CN111703081B - Plastic welding equipment and welding method for hot air welding - Google Patents
Plastic welding equipment and welding method for hot air welding Download PDFInfo
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- CN111703081B CN111703081B CN202010756690.9A CN202010756690A CN111703081B CN 111703081 B CN111703081 B CN 111703081B CN 202010756690 A CN202010756690 A CN 202010756690A CN 111703081 B CN111703081 B CN 111703081B
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- sliding table
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- 238000003466 welding Methods 0.000 title claims abstract description 137
- 238000004023 plastic welding Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 324
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 158
- 229920003023 plastic Polymers 0.000 claims abstract description 127
- 239000004033 plastic Substances 0.000 claims abstract description 127
- 238000010438 heat treatment Methods 0.000 claims abstract description 110
- 239000007789 gas Substances 0.000 claims abstract description 19
- 238000006073 displacement reaction Methods 0.000 claims description 55
- 230000001360 synchronised effect Effects 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 12
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 11
- 230000009467 reduction Effects 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
- B29C65/103—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined direct heating both surfaces to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/006—Handling moulds, e.g. between a mould store and a moulding machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7841—Holding or clamping means for handling purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/001—Joining in special atmospheres
- B29C66/0012—Joining in special atmospheres characterised by the type of environment
- B29C66/0014—Gaseous environments
- B29C66/00141—Protective gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/87—Auxiliary operations or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/87—Auxiliary operations or devices
- B29C66/872—Starting or stopping procedures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/97—Checking completion of joining or correct joining by using indications on at least one of the joined parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Robotics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention provides hot air welding plastic welding equipment and a welding method, wherein the welding equipment comprises a base, a first frame body, a second frame body, a third frame body and a fourth frame body are arranged on the base, a lower sliding table and an upper sliding table are arranged on the first frame body and the second frame body, an upper die clamp is arranged at the upper end of the lower sliding table, a lower die clamp is arranged at the lower end of the upper sliding table, a middle sliding table for occupying or avoiding the space position between the lower sliding table and the upper sliding table and the lower sliding table is arranged on the third frame body and the fourth frame, and a nitrogen heating middle die is arranged on the middle sliding table. When the hot gas welding plastic welding equipment is used for welding, the problem that the welding quality is poor after a hot plate is polluted by plastic parts in hot plate welding is solved, the problem that friction scraps exist in the vibration friction welding process is solved, the welding surfaces of the upper plastic part and the lower plastic part are heated to the welding temperature by using heated nitrogen, and the welding is lower than the laser welding cost, and the welding equipment can be used for welding any plastic part through the equipment, so that the application range of the equipment is widened.
Description
Technical Field
The invention belongs to the technical field of welding equipment, and particularly relates to hot air welding plastic welding equipment and a welding method.
Background
The existing plastic welding method mainly comprises hot plate welding, vibration friction welding, laser welding and the like, wherein the hot plate welding is to melt a plastic part by contacting the hot plate with the plastic part, and the plastic part is attached to the hot plate due to mutual contact between the plastic part and the hot plate, so that a wire drawing phenomenon is generated, a phenomenon of uneven pits is generated on the contact surface of the plastic part and the hot plate, and meanwhile, part of plastic materials can be remained when the surface of the hot plate is polluted by the plastic part, so that the welding quality of the plastic part in the re-welding process is influenced; the vibration friction welding is to load certain axial pressure on the welding surfaces of two plastic parts, and the welding surfaces of the two plastic parts are welded together through friction heat generated by intense friction movement, so that the welding surfaces of the two plastic parts usually fall off a lot of plastic scraps due to friction when the welding is finished, the scraps can be scattered on a tool or adhered on the welding surfaces of the plastic parts and are difficult to completely remove, the product is greatly influenced, and in addition, great noise is generated in the welding process, so that certain damage is caused to the health of operators; the laser welding is to press the welding surfaces of two plastic parts together by adopting lower pressure, then melt the welding surfaces of the plastic parts by the concentrated strong radiation wave generated by laser, thereby welding the two plastic parts together, the laser welding has certain requirements on the materials of the plastic parts, the two plastic parts welded together are transparent to the laser, the other plastic part is opaque to the laser, thus the laser welding can be realized, and the cost of the laser welding is higher.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a hot air welding plastic welding device and a welding method.
The technical scheme of the invention is as follows:
The hot air welding plastic welding equipment comprises a base, wherein a first frame body and a second frame body which are identical in structure and symmetrically arranged are fixedly arranged on two sides of the front end of the base, a lower sliding table and an upper sliding table which can move up and down are sequentially arranged between the first frame body and the second frame body from bottom to top, a lower die clamp for fixing a lower plastic piece is arranged at the upper end of the lower sliding table, and an upper die clamp for fixing an upper plastic piece is arranged at the lower end of the upper sliding table; the nitrogen heating middle die used for heating the welding surface of the upper plastic part and the welding surface of the lower plastic part is arranged on the middle sliding table, and the nitrogen heating middle die is used for conveying nitrogen through the nitrogen control device;
The lower sliding table comprises a lower frame body, two ends of the lower frame body are slidably mounted on sliding rails through sliding blocks, the sliding rails are fixedly mounted on a first frame body and a second frame body respectively, the sliding rails are perpendicular to a base, a lower mounting plate is fixedly mounted at the upper end of the lower frame body, positioning holes and bolt holes are formed in the lower mounting plate, and the lower frame body is driven to slide through a lower driving device; the upper sliding table comprises an upper frame body, two ends of the upper frame body are slidably arranged on sliding rails through sliding blocks, an upper mounting plate is fixedly arranged at the lower end of the upper frame body, and the upper sliding table is driven to slide through an upper driving device;
The middle sliding table comprises a left mounting plate and a right mounting plate, the bottom end of the left mounting plate is slidably mounted on a left sliding rail through a sliding block, the left sliding rail is fixedly mounted on an upper end cross beam of the third frame body, and the left mounting plate is driven to slide through a left driving device; the bottom of right side mounting panel passes through slider slidable mounting on right slide rail, right slide rail fixed mounting is on the upper end crossbeam of fourth support body, right side mounting panel passes through right drive arrangement drive and slides.
Preferably, the lower die clamp comprises a lower die bottom plate, positioning pins matched with positioning holes on a lower mounting plate are arranged at the front end of the lower die bottom plate, locking buttons matched with bolt holes on the lower mounting plate are arranged at corners of the lower die bottom plate, fixing columns are fixedly arranged on the lower die bottom plate, a lower die plate is fixedly arranged on the fixing columns, at least three guide sleeves are fixedly arranged on the lower die plate, lower die positioning pieces are fixedly arranged on the lower die plate, two lower die clamping cylinders are fixedly arranged at two sides of the bottom end of the lower die plate, the telescopic ends of the two lower die clamping cylinders are fixedly connected with the two lower die clamping blocks through connecting pieces respectively, and the lower plastic pieces are clamped and fixed under the combined action of the two lower die clamping blocks and the lower die positioning pieces;
the upper die clamp comprises an upper die plate, guide posts with the same number and positions as the guide sleeves are fixedly arranged at the lower end of the upper die plate, the upper die plate is fixedly arranged on an upper mounting plate through at least four upper die fixing pieces which are bilaterally symmetrical, an upper die positioning piece is fixedly arranged at the lower end of the upper die plate, two upper die clamping cylinders are arranged at the two sides of the upper die positioning piece, and the two upper die clamping cylinders are arranged on the upper die plate and clamp and fix an upper plastic piece under the combined action of the movement of the two upper die clamping cylinders and the upper die positioning piece;
The nitrogen heating middle die comprises a sealing box, a heating pipe is arranged in the sealing box, an air needle is arranged on the sealing box, the air needle penetrates through the sealing box, middle die mounting plates are fixedly arranged on two sides of the sealing box, two sides of the sealing box are respectively and fixedly arranged on a left side mounting plate and a right side mounting plate through middle die fixing pieces, at least two nitrogen conveying pipes are arranged on the middle die mounting plates on one side of the middle die mounting plates, the output end of each nitrogen conveying pipe is connected with the air needle after passing through the sealing box, the input end of each nitrogen conveying pipe is connected with a nitrogen control device, the nitrogen control device comprises pressure reducing valves connected with the output ends of nitrogen generators, the output ends of the pressure reducing valves are connected with air dividing blocks, the air dividing blocks are provided with output pipelines with the same quantity as the nitrogen conveying pipes, and nitrogen flowing into a flowmeter after passing through the throttle valves flows into the nitrogen conveying pipes.
Preferably, the upper driving device comprises an upper servo motor fixedly arranged on a servo motor mounting plate, the servo motor mounting plate is arranged above the upper sliding table, two ends of the servo motor mounting plate are fixedly arranged on the first frame body and the second frame body, an output shaft of the upper servo motor is connected with an input shaft of an upper T-shaped gear motor, two output shafts of the upper T-shaped gear motor are respectively connected with input shafts of two upper right-angle gear motors through a coupler and a connecting shaft, the two upper right-angle gear motors are fixedly arranged on the servo motor mounting plate, output shafts of the two upper right-angle gear motors are respectively fixedly connected with two upper ball screws, nuts of the two upper ball screws are fixedly arranged on the upper frame bodies, the other ends of the two upper ball screws are rotatably arranged in an upper screw mounting seat, and the upper screw mounting seat is fixedly arranged on the first frame body and the second frame body;
the lower driving device comprises a lower servo motor fixedly arranged on a base, an output shaft of the lower servo motor is connected with an input shaft of a lower T-shaped gear motor, output shafts at two ends of the lower T-shaped gear motor are respectively connected with input shafts of two lower right-angle gear motors through a coupler and a connecting shaft, the two lower right-angle gear motors are fixedly arranged on the base, output shafts of the two lower right-angle gear motors are respectively fixedly connected with two lower ball screws, nuts of the two lower ball screws are fixedly arranged on a lower frame body, the other ends of the two lower ball screws are rotatably arranged in lower screw mounting seats, and the lower screw mounting seats are fixedly arranged on a first frame body and a second frame body;
The left driving device comprises a left ball screw, one end of the left ball screw is fixedly provided with a synchronous pulley, one end of the left ball screw with the synchronous pulley is rotatably arranged in a mounting seat, the mounting seat of the left ball screw is fixedly arranged on an upper end cross beam of the third frame body and is arranged at the rear end of the third frame body, and a screw nut of the left ball screw is fixedly connected to a left mounting plate through a left connecting strip;
the right driving device comprises a right ball screw, one end of the right ball screw is fixedly provided with a synchronous pulley, one end of the right ball screw with the synchronous pulley is rotatably arranged in a mounting seat, the mounting seat of the right ball screw is fixedly arranged on an upper end cross beam of a fourth frame body and is arranged at the rear end of the fourth frame body, and a nut of the right ball screw is fixedly connected to a right side mounting plate through a right connecting strip;
The synchronous pulley at one end of the left ball screw and the synchronous pulley at one end of the right ball screw are meshed together on a synchronous belt, a servo motor provided with the synchronous pulley is meshed on the synchronous belt, and the servo motor is fixedly arranged on the third frame body.
Preferably, the lower sliding table further comprises a lower anti-falling device and a lower displacement detection device, the lower anti-falling device comprises a lower stop cylinder, the lower stop cylinder is fixedly arranged on a lower frame body between the second frame body and the lower mounting plate, a lower stop clamping plate is fixedly arranged at the telescopic end of the lower stop cylinder and is slidably arranged on a lower stop sliding rail through a sliding block, the lower stop sliding rail is fixedly arranged on the lower frame body, and when the telescopic end of the lower stop cylinder extends out, the lower stop clamping plate is driven to move from the lower frame body to the second frame body until being clamped on a stop shaft with a plurality of clamping steps, and the stop shaft is fixedly arranged on the second frame body and is perpendicular to the base; the lower displacement detection device comprises a lower displacement sensor, the lower displacement sensor is fixedly arranged on the first frame body and is perpendicular to the base, a lower displacement sensor sliding block is slidably arranged on the lower displacement sensor, and the lower displacement sensor sliding block is fixedly connected to the lower frame body through a lower sensor connecting plate;
The upper sliding table further comprises an upper anti-falling device and an upper displacement detection device, the upper anti-falling device comprises an upper stop cylinder, the upper stop cylinder is fixedly arranged on the upper frame body between the second frame body and the upper mounting plate, an upper stop clamping plate is fixedly arranged at the telescopic end of the upper stop cylinder and is slidably arranged on an upper stop sliding rail through a sliding block, the upper stop sliding rail is fixedly arranged on the upper frame body, and when the telescopic end of the upper stop cylinder extends out, the upper stop clamping plate is driven to move from the upper frame body to the second frame body until being clamped on a stop shaft; the upper displacement detection device comprises an upper displacement sensor, the upper displacement sensor is fixedly arranged on the first frame body and perpendicular to the base, an upper displacement sensor sliding block is slidably arranged on the upper displacement sensor, and the upper displacement sensor sliding block is fixedly connected to the upper frame body through an upper sensor connecting plate.
Preferably, the lower die moving device is arranged at the left end and the right end of the lower die bottom plate, the lower die moving device comprises two fixing seats fixedly arranged on the lower die bottom plate, cams are arranged in mounting holes of the two fixing seats, the two fixing seats and the two cams are fixedly arranged on a rotating shaft, a rotating shaft handle is fixedly arranged at one end of the rotating shaft, a rotating shaft sliding block is arranged in the fixing seat below the cams in a sliding manner, and rollers are arranged below the rotating shaft sliding block.
Preferably, the avoidance area is arranged at the middle position of the rear end of the base, the avoidance area is arranged between the third frame body and the fourth frame body, the hydraulic lifting vehicle is stored in the avoidance area, a die changing tool used for changing a nitrogen heating die is arranged on the hydraulic lifting vehicle, the die changing tool comprises a tool bottom plate which is in contact with the hydraulic lifting vehicle, a tool upright post is vertically arranged at the corner of the tool bottom plate, a tool top plate is fixedly arranged at the upper end of the tool upright post, a avoidance through hole is formed in the middle position of the tool top plate, and a plurality of limiting protrusions are arranged on the tool top plate.
Preferably, the base is provided with an outer frame body, the outer frame body covers the first frame body, the second frame body, the third frame body and the fourth frame body, an electric rolling door which is convenient for pushing a hydraulic lifting vehicle is arranged at the rear of the outer frame body, an electric cabinet is arranged on the side face of the outer frame body, a tower lamp used for exhausting fans and displaying running states of equipment is arranged at the upper end of the outer frame body, the exhausting fans are connected with ventilation pipelines of factories, a pneumatic safety door is arranged at the front end of the outer frame body, a safety correlation grating is arranged on the outer frame body around the safety door, and an operation touch screen is also arranged at the front end of the outer frame body.
Preferably, the guide post of the upper die clamp is a conical guide post, the guide sleeve of the lower die clamp is a conical guide sleeve, the conical guide post is fixedly arranged at the lower end of the upper die plate through a guide post support, and the free end of the conical guide post is provided with a conical head which is in contact with the lower die clamp when the die is closed; the conical guide sleeve comprises a guide sleeve positioning seat fixedly mounted on a lower template, a cushion block with a screw hole is fixedly mounted at the bottom end inside the guide sleeve positioning seat, a sliding guide sleeve is matched in the conical guide sleeve, a conical mounting hole matched with a conical head of a conical guide post is formed in the upper end of the sliding guide sleeve, a screw mounting hole is formed in the sliding guide sleeve below the conical mounting hole, a screw is mounted in the screw mounting hole, a spring is sleeved on the screw, the spring is arranged in the sliding guide sleeve, and when the spring is in a diastole state, the lower end of the sliding guide sleeve is in a suspension state.
Preferably, two handles are fixedly installed on the lower die bottom plate, and the two handles are arranged at the front end of the lower die bottom plate.
The invention also provides a welding method of the hot air welding plastic welding equipment, which comprises the following steps:
Step S1: upper part
The upper plastic piece and the lower plastic piece are respectively clamped and fixed by using an upper die clamp and a lower die clamp;
Step S11: clamping and fixing of upper plastic part
The operator takes the upper plastic part, the welding surface of the upper plastic part faces downwards, the non-welding surface of the upper plastic part faces upwards, the non-welding end of the upper plastic part is placed in the upper die positioning part, and the upper plastic part is clamped and fixed under the combined action of the upper die clamping cylinders and the upper die clamping jaws at the two sides;
Step S12: clamping and fixing of lower plastic part
The operator takes down the plastic part, the welding surface of the lower plastic part faces upwards, the non-welding surface of the lower plastic part faces downwards, the non-welding end of the lower plastic part is placed in the lower die positioning part, the lower die clamping cylinders at two sides are utilized to move to drive the lower die clamping blocks at two sides, and the lower plastic part is clamped and fixed under the combined action of the lower die positioning part and the lower die clamping blocks;
step S2: heating
Heating the welding surfaces of the upper plastic part and the lower plastic part by using a nitrogen heating middle die;
step S21: upper position of nitrogen heating middle mould
The left driving device and the right driving device are used for driving the middle sliding table to carry the nitrogen heating middle die to move to a preset position between the upper die clamp and the lower die clamp;
step S22: upper die clamp upper position
The upper sliding table is driven by the upper driving device to move downwards to a preset position above the middle mold adjacent to the nitrogen heating mold;
step S23: upper position of lower die clamp
The lower driving device is used for driving the lower sliding table to move upwards to a preset position below the middle die adjacent to the nitrogen heating die;
step S23: nitrogen supply and heating
The nitrogen is transmitted into the nitrogen control device by utilizing the nitrogen making machine, the nitrogen control device can control the pressure reduction, the gas distribution and the flow rate of the nitrogen, the nitrogen flowing out of the nitrogen control device is supplied into a gas needle of a nitrogen heating middle mold, the nitrogen is heated by utilizing a heating pipe, when the temperature of the nitrogen reaches the welding temperature, hot nitrogen is discharged by utilizing the gas needle penetrating through the sealing box, and the heating surface of an upper plastic part above the gas needle and the heating surface of a lower plastic part below the gas needle are heated by utilizing the hot nitrogen;
step S3: welding
Step S31: homing of a Nitrogen heated middle die
The left driving device and the right driving device are used for driving the middle sliding table to carry the nitrogen heating middle die to move out of a preset position between the upper die clamp and the lower die clamp to return to the original position, namely to be positioned above the rear end of the base;
Step S32: mold closing welding of upper plastic part welding surface and lower plastic part welding surface
The upper driving device and the lower driving device are used for respectively driving the upper die clamp and the lower die clamp to move relatively to a preset position, at the moment, the welding surface of the upper plastic part is completely contacted with the welding surface of the lower plastic part, and the guide pillar on the upper die plate is in butt joint with the guide sleeve on the lower die bottom plate;
Step S4: fetching part
Step S41: loosening of upper plastic parts
The upper die clamping cylinders on two sides are utilized to move, so that the upper plastic piece which is clamped and fixed is loosened;
Step S42: homing of upper die clamp
The upper driving device is used for driving the upper sliding table to move upwards to a preset position on the upper die clamp;
step S43: relaxation of lower plastic parts
The lower die clamping cylinders on two sides are utilized to move to drive the lower die clamping blocks on two sides to move outwards, the clamped and fixed lower plastic piece is loosened, and an operator takes down the welded plastic piece;
step S44: homing of lower die clamp
The lower driving device is used for driving the lower sliding table to move downwards to a preset position along with the lower die clamp;
step S5: die changing
When welding parts of different types are needed to be welded, die changing of an upper die clamp, a lower die clamp and a nitrogen heating middle die is carried out;
step S51: die changing of nitrogen heating middle die
Step S511: taking out mould
The operation worker lifts the electric rolling door, pushes the hydraulic lifting vehicle to carry the die changing tool to the position below the nitrogen heating middle die, lifts the hydraulic lifting vehicle until the die changing tool and the nitrogen heating middle die are in contact with each other, loosens the middle die fixing piece, removes the electric aviation plug and the air aviation plug which are electrically connected with the nitrogen heating middle die and the equipment, continuously lifts the hydraulic lifting vehicle, enables the nitrogen heating middle die to be separated from the middle sliding table, moves the middle sliding table forward, lowers the hydraulic lifting vehicle, lowers the nitrogen heating middle die at the same time, pushes out the hydraulic lifting vehicle, and removes the original nitrogen heating middle die;
Step S512: changing new mould
And simultaneously placing a new nitrogen heating middle die in the original nitrogen heating middle die, pushing the hydraulic lifting vehicle to the middle position of the third frame body and the fourth frame body along the rolling door, lifting the hydraulic lifting vehicle, moving the middle sliding table backwards to two sides of the new nitrogen heating middle die, fixing the new nitrogen heating middle die by utilizing a middle die fixing piece, installing an electric aviation plug and an air aviation plug which are electrically connected with the new nitrogen heating middle die and equipment, lowering the hydraulic lifting vehicle, and closing the electric rolling door.
Step S52: die changing of upper die clamp and lower die clamp
Step S521: taking out mould
Performing die assembly operation on the upper die clamp and the lower die clamp, wherein a guide post of the upper die clamp is in butt joint with a guide sleeve of the lower die clamp;
The operator removes the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the upper die clamp, loosens the upper die fixing piece, moves the upper sliding table upwards, and enables the upper die clamp to be separated from the upper sliding table;
The locking button on the lower die clamp is loosened by an operator, the positioning pin is lifted, the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the lower die clamp are detached, the roller is slipped out by using the lower die moving device, the handle is pulled to move the lower die clamp outwards, the lower die clamp and the upper die clamp roll out from the lower sliding table, and the lower die clamp and the upper die clamp are moved;
step S522: changing new mould
An operator moves the new upper die clamp and the new lower die clamp onto the lower sliding table, fixes the new lower die clamp onto the lower sliding table by utilizing a locking button and a positioning pin on the lower die clamp, and installs the electric aviation plug and the air aviation plug which are electrically connected with the equipment by the new lower die clamp;
the upper sliding table is moved downwards until the new upper die clamp is contacted with the upper sliding table, the upper die fixing piece is utilized to fix the new upper die clamp to the lower end of the upper sliding table, and the new upper die clamp is installed to be electrically connected with the electric aviation plug and the air aviation plug of the equipment.
The beneficial effects of the invention are as follows:
(1) The hot gas welding plastic welding equipment provided by the invention does not need to contact a plastic part with a hot plate, does not have the problem of poor welding quality after the hot plate is polluted by the plastic part in hot plate welding, does not need to carry out severe friction between the plastic parts, does not have the problem of friction scraps in the vibration friction welding process, and utilizes heated nitrogen to heat the welding surfaces of the upper plastic part and the lower plastic part to a welding temperature for welding.
(2) The upper driving device and the lower driving device are arranged on the periphery and do not occupy welding space, meanwhile, the upper sliding table is connected with the upper die clamp through the upper die fixing piece, the upper die clamp is convenient to detach and replace, the upper sliding table and the lower sliding table can be stably lifted or lowered by adopting a mode that a servo motor drives a ball screw to rotate through a gear motor, the upper sliding table is driven to move by using one upper servo motor, the consistency of the movement processes of the left side and the right side of the upper sliding table is ensured, the lower sliding table is driven to move by using one lower servo motor, and the consistency of the movement processes of the left side and the right side of the lower sliding table is ensured.
(3) The hot air welding plastic welding equipment provided by the invention adopts a mechanical clamping plate mode, has high locking force, and can prevent the plastic welding equipment from falling off accidentally in the static or moving process of the upper sliding table and the lower sliding table. In addition, an upper displacement detection device for detecting the displacement of the upper sliding table and a lower displacement detection device for detecting the displacement of the lower sliding table are further arranged, whether the displacement conditions of the upper sliding table and the lower sliding table are the same as the preset displacement is monitored in real time, and if the displacement conditions are the same, the operation of the welding equipment can be immediately stopped, and the safety of the welding equipment is further guaranteed.
(4) According to the hot air welding plastic welding equipment provided by the invention, the hydraulic lifting truck and the die changing tool are placed in the outer frame body, so that the equipment is convenient to store, meanwhile, the equipment has high flexibility, the nitrogen heating middle die can be changed through the die changing tool so as to meet the welding requirements of different products, wherein the lower die clamp is set to be of a dragging movement type, the upper die clamp and the lower die clamp are matched with each other through the handle and the idler wheels, and then the lower die clamp is dragged, sliding friction is changed into rolling friction in the dragging process, so that the die changing is convenient, and the die changing man-hour and the die changing manpower are saved.
(5) According to the hot gas welding plastic welding equipment provided by the invention, the nitrogen is utilized to control the pressure and flow of the nitrogen through the nitrogen control device, and then flows into the nitrogen heating middle mold, wherein the sealing box in the nitrogen heating middle mold reduces the heat loss of the heating pipe, the heating rate is improved, meanwhile, the air needle penetrates through the sealing box, the welding surfaces of upper and lower plastic parts are conveniently heated, in addition, the nitrogen is utilized to heat the plastic, the oxidation phenomenon caused by air heating is avoided, and the welding quality is improved.
(6) According to the hot air welding plastic welding equipment provided by the invention, the electric cabinet is electrically connected with the upper servo motor, the lower servo motor, the operation touch screen, the tower lamp, the safety door and the safety correlation grating, and the operation process of the equipment is controlled by operating the touch screen, so that the number of operators is saved. When the tower lamp shows green, this equipment operation is normal, when the tower lamp shows red, this equipment trouble, when the tower lamp shows yellow, this equipment gets into the debugging stage, and convenient management and maintenance personnel observe the equipment condition in time to handle equipment problem in the distance.
(7) The welding method of the hot air welding plastic welding equipment provided by the invention comprises the steps of feeding, heating, welding, taking and die changing, wherein the heating step is to heat the welding surfaces of the upper plastic part and the lower plastic part by using a nitrogen heating middle die, and the heating uniformity of the welding surfaces is ensured due to the fact that the welding surfaces of the upper plastic part and the lower plastic part are filled with hot nitrogen, so that the two welding surfaces can be completely fused together in the welding process, and the welding surfaces are attractive.
Drawings
Other objects and attainments together with a more complete understanding of the invention will become apparent and appreciated by referring to the following description taken in conjunction with the accompanying drawings. In the drawings:
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is another angular structure of fig. 1.
Fig. 4 is a schematic view of the structure of the present invention after the outer frame is removed.
Fig. 5 is an assembly schematic diagram of the upper sliding table and the lower sliding table, the first frame body and the second frame body.
Fig. 6 is a front view of fig. 5.
Fig. 7 is an enlarged view at a in fig. 5.
Fig. 8 is an enlarged view at B in fig. 5.
Fig. 9 is an enlarged view at C in fig. 5.
Fig. 10 is an enlarged view of D in fig. 5.
Fig. 11 is an assembly schematic diagram of the third frame body and the fourth frame body, the middle sliding table and the nitrogen heating middle die.
Fig. 12 is an exploded view of the third frame, the fourth frame and the middle slide table according to the present invention.
FIG. 13 is a schematic view of the structure of the upper die clamp in the present invention.
Fig. 14 is a schematic structural view of a lower die clamp in the present invention.
Fig. 15 is another angular structure diagram of fig. 14.
FIG. 16 is a schematic view of a nitrogen heating intermediate die according to the present invention.
Fig. 17 is a front view of fig. 16.
Fig. 18 is a top view of fig. 16.
FIG. 19 is a schematic view showing the structure of a nitrogen gas control device in the present invention.
Fig. 20 is a schematic structural diagram of a mold changing tool according to the present invention.
Fig. 21 is a cross-sectional view of a tapered guide sleeve in accordance with the present invention.
Wherein the reference numerals are as follows: the nitrogen gas heating device comprises a base 1, a lower sliding table 2, an upper sliding table 3, a lower die clamp 4, an upper die clamp 5, a nitrogen gas heating middle die 7, a nitrogen gas control device 8, an outer frame 9, a first frame 101, a second frame 102, a third frame 103, a fourth frame 104, an avoidance area 105, a hydraulic lifting car 106, a die changing tool 107, a tool bottom plate 108, a tool upright post 109, a tool top plate 110, an avoidance through hole 111, a limit bulge 112, a lower frame 201, a sliding rail 202, a lower mounting plate 203, a lower servo motor 204, a lower ball screw 205, a lower anti-falling device 206, a lower displacement detection device 207, a lower stop cylinder 208, a lower stop clamping plate 209, a lower stop slide 210, a stop shaft 211, a lower displacement sensor 212, a lower displacement sensor slider 213, a lower sensor connecting plate 214, an upper frame 301, an upper mounting plate 302, an upper servo motor 303, an upper ball screw 304 the upper anti-drop device 305, the upper displacement detection device 306, the upper stopper cylinder 307, the upper stopper clamp plate 308, the upper stopper slide rail 309, the upper displacement sensor 310, the upper displacement sensor slider 311, the upper sensor connecting plate 312, the lower die bottom plate 401, the tapered guide sleeve 402, the guide sleeve positioning seat 402-1, the cushion block 402-2, the sliding guide sleeve 402-3, the tapered mounting hole 402-4, the screw 402-5, the spring 402-6, the positioning pin 403, the locking knob 404, the fixed column 405, the lower die plate 406, the lower die positioning member 407, the lower die clamping cylinder 408, the lower die clamping block 409, the lower die moving device, the fixed seat 410, the cam 411, the rotating shaft handle 412, the rotating shaft slider 413, the roller 414, the pull handle 415, the upper die plate 501, the tapered guide post 502, the tapered head 502-1, the guide post support 502-2, the upper die fixing member 503, the upper die positioning member 504, the upper die clamping cylinder 505 (model: OFO-95), left mounting plate 601, right mounting plate 602, left slide rail 603, left driving device, right slide rail 604, left ball screw 605, left connecting bar 606, right ball screw 607, right connecting bar 608, toothed belt 609, servo motor 610, shroud 611, seal box 701, heating pipe 702, air needle 703, middle mounting plate 704, middle fixing piece 705, nitrogen delivery pipe 706, nitrogen generator 801, pressure reducing valve 802, air dividing block 803, throttle valve 804, flowmeter 805, electric roller shutter 901, electric cabinet 902, exhaust fan 903, tower light 904, safety door 905, safety correlation grating 906, and operation touch screen 907.
Detailed Description
The following detailed description of the application, taken in conjunction with the accompanying drawings, is not intended to limit the scope of the application, so that those skilled in the art may better understand the technical solutions of the application and their advantages.
Example 1: plastic welding equipment for hot air welding
Referring to fig. 2 to 4, it is shown that: the hot air welding plastic welding equipment comprises a base 1, wherein a first frame body 101 and a second frame body 102 which are identical in structure and symmetrically arranged are fixedly arranged on two sides of the front end of the base 1, a lower sliding table 2 and an upper sliding table 3 which can move up and down are sequentially arranged between the first frame body 101 and the second frame body 102 from bottom to top, a lower die clamp 4 for fixing a lower plastic part is arranged at the upper end of the lower sliding table 2, and an upper die clamp 5 for fixing an upper plastic part is arranged at the lower end of the upper sliding table 3; the rear end both sides fixed mounting of base 1 have the same and symmetrical third support body 103 and the fourth support body 104 that set up of structure, are provided with on third support body 103 and the fourth support body 104 to be used for taking or dodging the well slip table of space position between lower slip table 2 and the last slip table 3, well slip table can follow base 1 and reciprocate, installs the nitrogen gas heating well mould 7 that is used for heating last working of plastics welding face and working of plastics welding face down on the well slip table, and nitrogen gas heating well mould 7 carries nitrogen gas through nitrogen gas controlling means 8.
See fig. 6: the lower sliding table 2 comprises a lower frame 201, two ends of the lower frame 201 are slidably mounted on sliding rails 202 through sliding blocks, the sliding rails 202 are fixedly mounted on the first frame 101 and the second frame 102 respectively, a lower mounting plate 203 is fixedly mounted at the upper end of the lower frame 201, positioning holes and bolt holes are formed in the lower mounting plate 203, the lower frame 201 is driven to slide through a lower driving device, the lower driving device comprises a lower servo motor 204 fixedly mounted on a base 1, an output shaft of the lower servo motor 204 is connected with an input shaft of a lower T-shaped speed reducing motor, two output shafts of the lower T-shaped speed reducing motor are connected with input shafts of two lower right-angle speed reducing motors through couplings and connecting shafts respectively, the two lower right-angle speed reducing motors are fixedly mounted on the base 1, output shafts of the two lower right-angle speed reducing motors are fixedly connected with two lower ball screws 205 respectively, nuts of the two lower ball screws 205 are fixedly mounted on the lower frame 201, the other ends of the two lower ball screws 205 are rotatably mounted in a lower screw mounting seat, and the lower mounting seat is fixedly mounted on the first frame 101 and the second frame 102.
Referring to fig. 5, 8 and 10, it is shown that: the lower sliding table 2 further comprises a lower anti-falling device 206 and a lower displacement detection device 207, the lower anti-falling device 206 comprises a lower stop cylinder 208, the lower stop cylinder 208 is fixedly arranged on a lower frame 201 between the second frame 102 and the lower mounting plate 203, a lower stop clamping plate 209 is fixedly arranged at the telescopic end of the lower stop cylinder 208, the lower stop clamping plate 209 is slidably arranged on a lower stop sliding rail 210 through a sliding block, the lower stop sliding rail 210 is fixedly arranged on the lower frame 201, when the telescopic end of the lower stop cylinder 208 extends out, the lower stop clamping plate 209 is driven to move from the lower frame 201 to the second frame 102 until being clamped on a stop shaft 211 with a plurality of clamping steps, and the stop shaft 211 is fixedly arranged on the second frame 102 and is perpendicular to the base 1; the lower displacement detection device 207 includes a lower displacement sensor 212, where the lower displacement sensor 212 is fixedly installed on the first frame 101 and is perpendicular to the base 1, and a lower displacement sensor slider 213 is slidably installed on the lower displacement sensor 212, and the lower displacement sensor slider 213 is fixedly connected to the lower frame 201 through a lower sensor connection plate 214.
See fig. 5 and 6: the upper sliding table 3 comprises an upper frame body 301, two ends of the upper frame body 301 are slidably mounted on sliding rails 202 through sliding blocks, an upper mounting plate 302 is fixedly mounted at the lower end of the upper frame body 301, the upper sliding table 3 is driven to slide through an upper driving device, the upper driving device comprises an upper servo motor 303 fixedly mounted on the servo motor mounting plate, the servo motor mounting plate is arranged above the upper sliding table 3, two ends of the servo motor mounting plate are fixedly mounted on the first frame body 101 and the second frame body 102, an output shaft of the upper servo motor 303 is connected with an input shaft of an upper T-shaped gear motor, two output shafts of the upper T-shaped gear motor are respectively connected with input shafts of two upper right-angle gear motors through a coupler and a connecting shaft, the two upper right-angle gear motors are fixedly mounted on the servo motor mounting plate, output shafts of the two upper right-angle gear motors are respectively fixedly connected with two upper ball screws 304, nuts of the two upper ball screws 304 are fixedly mounted on the upper frame body 301, the other ends of the two upper ball screws 304 are rotatably mounted in upper screw mounting seats, and the upper screw mounting seats are fixedly mounted on the first frame body 101 and the second frame body 102.
Referring to fig. 5, 7 and 9, the upper sliding table 3 further includes an upper anti-falling device 305 and an upper displacement detection device 306, the upper anti-falling device 305 includes an upper stop cylinder 307, the upper stop cylinder 307 is fixedly installed on the upper frame 301 between the second frame 102 and the upper mounting plate 302, an upper stop clamping plate 308 is fixedly installed at the telescopic end of the upper stop cylinder 307, the upper stop clamping plate 308 is slidably installed on the upper stop sliding rail 309 through a sliding block, the upper stop sliding rail 309 is fixedly installed on the upper frame 301, and when the telescopic end of the upper stop cylinder 307 extends, the upper stop clamping plate 308 is driven to move from the upper frame 301 to the second frame 102 until being clamped on the stop shaft 211; the upper displacement detection device 306 includes an upper displacement sensor 310, where the upper displacement sensor 310 is fixedly installed on the first frame 101 and is perpendicular to the base 1, and an upper displacement sensor slider 311 is slidably installed on the upper displacement sensor 310, and the upper displacement sensor slider 311 is fixedly connected to the upper frame 301 through an upper sensor connection board 312.
Referring to fig. 11 and 12, it is shown that: the middle sliding table comprises a left mounting plate 601 and a right mounting plate 602, the bottom end of the left mounting plate 601 is slidably mounted on a left sliding rail 603 through a sliding block, the left sliding rail 603 is fixedly mounted on a cross beam of the third frame 103, and the left mounting plate 601 is driven to slide through a left driving device; the bottom end of the right mounting plate 602 is slidably mounted on a right sliding rail 604 through a sliding block, the right sliding rail 604 is fixedly mounted on a cross beam of the fourth frame 104, and the right mounting plate 602 is driven to slide through a right driving device;
The left driving device comprises a left ball screw 605, one end of the left ball screw 605 is provided with a synchronous pulley, one end of the left ball screw 605 provided with the synchronous pulley is rotatably arranged in a mounting seat of the left ball screw 605, the mounting seat of the left ball screw 605 is fixedly arranged on an upper end cross beam of the third frame body 103 and is arranged at the rear end of the third frame body 103, and a screw nut of the left ball screw 605 is fixedly connected on a left mounting plate 601 through a left connecting strip 606; the right driving device comprises a right ball screw 607, one end of the right ball screw 607 is provided with a synchronous pulley, one end of the right ball screw 607 provided with the synchronous pulley is rotatably arranged in a mounting seat of the right ball screw 607, the mounting seat of the right ball screw 607 is fixedly arranged on an upper end cross beam of the fourth frame 104 and is arranged at the rear end of the fourth frame 104, and a screw nut of the right ball screw 607 is fixedly connected on the right mounting plate 602 through a right connecting strip 608;
The synchronous pulley at one end of the left ball screw 605 and the synchronous pulley at one end of the right ball screw 607 are meshed together on a synchronous belt 609, a servo motor 610 provided with the synchronous pulley is meshed on the synchronous belt 609, the servo motor 610 is fixedly arranged on the third frame 103, and a shield 611 (see fig. 4) for covering the synchronous belt 609 is further arranged at the synchronous belt 609 at the rear ends of the third frame 103 and the fourth frame 104.
Referring to fig. 6, 14 and 15: the lower die clamp 4 comprises a lower die bottom plate 401, positioning pins 403 which are matched with positioning holes on the lower mounting plate 203 are arranged on the lower die bottom plate 401, the positioning pins 403 are arranged at the front end of the lower die bottom plate 401, locking buttons 404 which are matched with bolt holes on the lower mounting plate 203 are arranged at the corners of the lower die bottom plate 401, fixing columns 405 are fixedly arranged on the lower die bottom plate 401, a lower die plate 406 is fixedly arranged on the fixing columns 405, and three conical guide sleeves 402 are fixedly arranged on the lower die plate 406; the tapered guide sleeve 402 comprises a guide sleeve positioning seat 402-1 fixedly mounted on a lower template 406, a cushion block 402-2 with a screw hole is fixedly arranged at the bottom end inside the guide sleeve positioning seat 402-1, a sliding guide sleeve 402-3 is matched in the tapered guide sleeve 402, a tapered mounting hole 402-4 matched with the tapered head 502-1 of the tapered guide pillar 502 is formed in the upper end of the sliding guide sleeve 402-3, a screw mounting hole is formed in the sliding guide sleeve 402-3 below the tapered mounting hole 402-4, a screw 402-5 is mounted in the screw mounting hole, a spring 402-6 is sleeved on the screw, the spring 402-6 is arranged in the sliding guide sleeve 402-3, and when the spring 402-6 is in a relaxed state, the lower end of the sliding guide sleeve 402-3 is in a suspended state (see fig. 21).
The lower die plate 406 is fixedly provided with a lower die positioning piece 407, one side of the lower die positioning piece 407 is provided with an arc positioning groove, the bottom end of the lower die plate 406 is fixedly provided with two lower die clamping cylinders 408, the telescopic ends of the two lower die clamping cylinders 408 are respectively fixedly connected with two lower die clamping blocks 409, the two lower die clamping blocks 409 are symmetrically arranged, the front ends of the two lower die clamping blocks 409 are provided with arc positioning grooves, and the lower plastic piece is clamped and fixed in the arc positioning groove under the combined action of the two lower die clamping blocks 409 and the lower die positioning piece 407;
The lower die moving device is installed at both ends about lower die bottom plate 401, lower die moving device includes two fixing bases 410 of fixed mounting on lower die bottom plate 401, all be provided with cam 411 in the mounting hole of two fixing bases 410, two fixing bases 410 and two cams 411 are all fixed mounting in a pivot, pivot handle 412 is fixed mounting in one end of pivot, pivot handle 412 is adjacent the front end of lower die bottom plate 401, pivot slider 413 is installed to the fixing base 410 slidable in cam 411 below, gyro wheel 414 is installed to the below of pivot slider 413.
See fig. 14: two handles 415 are fixedly installed on the lower die bottom plate 401, and the two handles 415 are arranged at the front end of the lower die bottom plate 401.
Referring to fig. 6 and 13: the upper die clamp 5 comprises an upper die plate 501, three conical guide posts 502 are fixedly arranged at the lower end of the upper die plate 501, the conical guide posts 502 are fixedly arranged at the lower end of the upper die plate 501 through guide post supports 502-2, conical heads 502-1 which are mutually contacted with the lower die clamp 4 during die assembly are arranged at the free ends of the conical guide posts 502, the upper die plate 501 is fixedly arranged at the bottom end of the upper mounting plate 302 through six upper die fixing pieces 503 which are symmetrical left and right, a locking handle in the upper die fixing pieces 503 is rotated to drive a locking pressing block in the upper die fixing pieces 503 to fixedly arrange the upper die plate 501 on the upper mounting plate 302, an upper die positioning piece 504 is fixedly arranged at the lower end of the upper die plate 501, two upper die clamping cylinders 505 are arranged at two sides of the upper die positioning piece 504 and fixedly arranged on the upper die plate 501, and the upper plastic piece is clamped and fixed under the combined action of the two upper die clamping cylinders 505.
Referring to fig. 3, 12, and 16 to 19, it is shown that: the nitrogen heating middle die 7 comprises a sealing box 701, a heating pipe 702 is arranged in the sealing box 701, an air needle 703 is arranged on the sealing box 701, the air needle 703 penetrates through the sealing box 701, middle die mounting plates 704 are fixedly arranged on two sides of the sealing box 701, the middle die mounting plates 704 on two sides are respectively and fixedly arranged on a left side mounting plate 601 and a right side mounting plate 602 through middle die fixing pieces 705, two middle die mounting posts 707 are respectively arranged on the middle die mounting plates 704, the two middle die mounting posts 707 on the left side mounting plate 601 and the right side mounting plate 602 are arranged in the middle die fixing pieces 705, the middle die fixing pieces 705 comprise fixing blocks with through holes and screwing handles fixedly arranged on the fixing blocks, the middle die mounting posts 707 arranged in the fixing blocks are locked and fixed through rotation of the screwing handles, eight nitrogen conveying pipes 706 are arranged on the middle die mounting plates 704 on one side, the output ends of the nitrogen conveying pipes 706 are connected with the air needle 703 after penetrating through the sealing box 701, four nitrogen conveying pipes 706 are arranged at positions above the heating pipe 702, in addition, the four nitrogen conveying pipes 706 are arranged at positions below the heating pipe 702, the input ends of the nitrogen conveying pipes 706 are connected with a nitrogen conveying control device 802, the nitrogen conveying device 802 and a nitrogen conveying device 802 are connected with a nitrogen conveying device, and a nitrogen conveying device is connected with a nitrogen conveying device through a pressure reducing valve 803, and a nitrogen conveying device is connected with a nitrogen conveying device 803, and a nitrogen conveying device is connected with a nitrogen meter 803, and a nitrogen conveying device is connected through a pressure reducing valve 803, and a nitrogen flow meter 803.
Referring to fig. 4, 5 and 20, it is shown that: the area 105 of dodging has been seted up to base 1 rear end intermediate position, dodge the district 105 setting and be used for depositing hydraulic lift truck 106 in dodging between third support body 103 and fourth support body 104, be provided with the retooling frock 107 that is used for changing the mould 7 in the nitrogen gas heating on the hydraulic lift truck 106, retooling frock 107 includes the frock bottom plate 108 that contacts with hydraulic lift truck 106, frock stand 109 is installed perpendicularly to frock bottom plate 108's corner, frock stand 109 upper end fixed mounting has frock roof 110, the structure of dodging through-hole 111 in order to dodge intermediate position in the nitrogen gas heating mould 7 has been seted up to frock roof 110's intermediate position, be provided with a plurality of spacing arch 112 on the frock roof 110.
Referring to fig. 1 and 3, it is shown that: be provided with frame body 9 on the base 1, frame body 9 covers first support body 101, second support body 102, third support body 103, fourth support body 104, the rear of frame body 9 is installed and is convenient for push away the electronic rolling slats door 901 of hydraulic lift truck 106, electric cabinet 902 is installed to the side of frame body 9, be used for air fan 903 and display device running state's tower lamp 904 is installed to the upper end of frame body 9, air fan 903 is connected with the air pipe of factory side, pneumatic emergency exit 905 is installed to the front end of frame body 9, install safe correlation grating 906 on the frame body 9 around emergency exit 905, the operation touch screen is still installed to the front end of frame body 9, wherein electronic rolling slats door 901, air fan 903, tower lamp 904, emergency exit 905, safe correlation grating 906 all are connected with the electric cabinet 902 electricity.
Example 2: the welding method of the hot air welding plastic welding apparatus provided by the present invention will be described in detail with reference to fig. 1 to 21.
The welding method of the hot air welding plastic welding equipment comprises the steps of respectively clamping and fixing an upper plastic part and a lower plastic part by using an upper die clamp 5 and a lower die clamp 4; the operator takes the upper plastic part, the welding surface of the upper plastic part faces downwards, the non-welding surface of the upper plastic part faces upwards, the non-welding end of the upper plastic part is placed in the upper die positioning piece 504, and the upper plastic part is clamped and fixed under the combined action of the upper die clamping cylinder 505 and the upper die clamping jaw 505 on two sides; the operator takes down the plastic part, the welding surface of the lower plastic part faces upwards, the non-welding surface of the lower plastic part faces downwards, the non-welding end of the lower plastic part is placed in the lower die positioning part 407, the lower die clamping cylinders 408 on two sides are utilized to move to drive the lower die clamping blocks 409 on two sides, and the lower plastic part is clamped and fixed under the combined action of the lower die positioning part 407 and the lower die clamping blocks 409;
The welding surfaces of the upper plastic part and the lower plastic part are heated by using a nitrogen heating middle die 7; the left driving device and the right driving device are used for driving the middle sliding table to move to a preset position between the upper die clamp 5 and the lower die clamp 4 with the nitrogen heating middle die 7; the upper sliding table 3 is driven by the upper driving device to move downwards to a preset position above the middle die 7 adjacent to the nitrogen heating die by carrying the upper die clamp 5; the lower driving device is used for driving the lower sliding table 2 to move upwards to a preset position below the adjacent nitrogen heating middle die 7 along with the lower die clamp 4; the nitrogen is transmitted into the nitrogen control device 8 by the nitrogen making machine 801, the nitrogen control device 8 can control the pressure reduction, the gas distribution and the flow rate of the nitrogen, the nitrogen flowing out of the nitrogen control device 8 is supplied into the gas needle 703 of the nitrogen heating middle mould 7, the heating pipe 702 is used for heating the nitrogen, when the temperature of the nitrogen reaches the welding temperature, the gas needle 703 penetrating through the sealing box 701 is used for discharging hot nitrogen, and the hot nitrogen is used for heating the welding surface of the upper plastic part above the gas needle 703 and the welding surface of the lower plastic part below the gas needle 703;
The left driving device and the right driving device are used for driving the middle sliding table to carry the nitrogen heating middle die 7 to move out of the preset position between the upper die clamp 5 and the lower die clamp 4, and the middle sliding table is in the original position, namely, the position above the rear end of the base 1; the upper driving device and the lower driving device are used for respectively driving the upper die clamp 5 and the lower die clamp 4 to move relatively to a preset position, and the conical head 502-1 of the conical guide pillar 502 on the upper die plate 501 is inserted into the conical mounting hole 402-4 of the conical guide sleeve 402 on the lower die bottom plate 401, so that the welding surface of the upper plastic part and the welding surface of the lower plastic part are completely in contact welding;
The upper die clamping cylinders on two sides are utilized to move to drive the upper die clamping claws 505 on two sides to move outwards, so that the upper plastic piece which is clamped and fixed is loosened; the upper sliding table 3 is driven by an upper driving device to move upwards to a preset position by carrying an upper die clamp 5; the lower die clamping cylinders 408 on two sides are utilized to move to drive the lower die clamping blocks 409 on two sides to move outwards, so that the lower plastic piece which is clamped and fixed is loosened, and an operator takes down the welded plastic piece; the lower driving device is used for driving the lower sliding table 2 to move downwards to a preset position by carrying the lower die clamp 4.
When welding of different types of welding pieces is required, the die changing tool 107 is utilized to change the die of the nitrogen heating middle die 7;
The operator lifts the electric rolling door 901, pushes the hydraulic lifting vehicle 106 to carry the die changing tool 107 to the position below the nitrogen heating middle die 7, lifts the hydraulic lifting vehicle 106 until the die changing tool 107 and the nitrogen heating middle die 7 are in contact with each other, loosens the middle die fixing piece 705, removes electric aviation plug and gas aviation plug which are electrically connected with the nitrogen heating middle die 7 and equipment, continues to lift the hydraulic lifting vehicle 106, enables the nitrogen heating middle die 7 to be separated from the middle sliding table, moves forward the middle sliding table, lowers the hydraulic lifting vehicle 106, simultaneously lowers the nitrogen heating middle die 7, pushes out the hydraulic lifting vehicle 106, and removes the original nitrogen heating middle die 7; the method comprises the steps of taking down an original nitrogen heating middle die 7, simultaneously placing a new nitrogen heating middle die 7, pushing a hydraulic lifting vehicle 106 into an avoidance area 105 at the middle position of a third frame body 103 and a fourth frame body 104 along a rolling door, lifting the hydraulic lifting vehicle 106, moving a middle sliding table to two sides of the new nitrogen heating middle die, fixing the new nitrogen heating middle die by utilizing a middle die fixing piece 705, installing an electric aviation plug and an air aviation plug which are electrically connected with equipment in the new nitrogen heating middle die, lowering the hydraulic lifting vehicle 106, and closing an electric rolling door 901;
Performing die assembly operation on the upper die clamp 5 and the lower die clamp 4, wherein at the moment, the conical head 502-1 of the conical guide pillar 502 of the upper die clamp 5 enters the conical mounting hole 402-4 of the conical guide sleeve 402 of the lower die clamp 4 to be positioned; the operator removes the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the upper die clamp 5, loosens the upper die fixing part 503, moves the upper sliding table 3 upwards, and enables the upper die clamp 5 to be separated from the upper sliding table 3; the operator releases the locking button 404 on the lower die clamp 4, lifts the positioning pin 403, removes the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the lower die clamp 4, slides out the roller 414 by using the lower die moving device, pulls the handle 415 to move the lower die clamp 4 and the upper die clamp 5 outwards, so that the lower die clamp 4 is separated from the lower sliding table 2, and removes the lower die clamp 4 and the upper die clamp 5; placing the new upper die clamp and the new lower die clamp on the hydraulic lift truck 106 and transferring to the position of the safety door 905; an operator moves the new upper die clamp and the new lower die clamp onto the lower sliding table 2, fixes the new lower die clamp onto the lower sliding table 2 by utilizing a locking hand button 404 and a positioning pin 403 on the lower die clamp 4, and installs the electric aviation plug and the air aviation plug which are electrically connected with the equipment; the upper sliding table 3 is moved downwards until the new upper die clamp is contacted with the upper sliding table 3, the upper die fixing part 503 is utilized to fix the new upper die clamp to the lower end of the upper sliding table 3, the electric aviation plug and the air aviation plug which are electrically connected with the equipment are installed on the new upper die clamp, and die changing is finished.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A hot air welding plastic welding device is characterized in that: the device comprises a base, wherein a first frame body and a second frame body which are identical in structure and symmetrically arranged are fixedly arranged on two sides of the front end of the base, a lower sliding table and an upper sliding table which move up and down are sequentially arranged between the first frame body and the second frame body from bottom to top, a lower die clamp for fixing a lower plastic piece is arranged at the upper end of the lower sliding table, and an upper die clamp for fixing an upper plastic piece is arranged at the lower end of the upper sliding table; the nitrogen heating middle die is arranged on the middle sliding table and used for heating the welding surface of the upper plastic part and the welding surface of the lower plastic part, and the nitrogen heating middle die is used for conveying nitrogen through the nitrogen control device;
The lower sliding table comprises a lower frame body, two ends of the lower frame body are slidably mounted on sliding rails through sliding blocks, the sliding rails are fixedly mounted on a first frame body and a second frame body respectively, the sliding rails are perpendicular to a base, a lower mounting plate is fixedly mounted at the upper end of the lower frame body, positioning holes and bolt holes are formed in the lower mounting plate, and the lower frame body is driven to slide through a lower driving device; the upper sliding table comprises an upper frame body, two ends of the upper frame body are slidably mounted on the sliding rail through sliding blocks, an upper mounting plate is fixedly arranged at the lower end of the upper frame body, and the upper sliding table is driven to slide through an upper driving device;
The middle sliding table comprises a left mounting plate and a right mounting plate, the bottom end of the left mounting plate is slidably mounted on a left sliding rail through a sliding block, the left sliding rail is fixedly mounted on an upper end cross beam of the third frame body, and the left mounting plate is driven to slide through a left driving device; the bottom end of the right mounting plate is slidably mounted on a right sliding rail through a sliding block, the right sliding rail is fixedly mounted on the upper end cross beam of the fourth frame body, and the right mounting plate is driven to slide through a right driving device;
the lower die clamp comprises a lower die bottom plate, positioning pins matched with positioning holes on a lower mounting plate are arranged at the front end of the lower die bottom plate, locking buttons matched with bolt holes on the lower mounting plate are arranged at corners of the lower die bottom plate, fixing columns are fixedly arranged on the lower die bottom plate, a lower die plate is fixedly arranged on the fixing columns, at least three guide sleeves are fixedly arranged on the lower die plate, lower die positioning pieces are fixedly arranged on the lower die plate, two lower die clamping cylinders are fixedly arranged on two sides of the bottom end of the lower die plate, telescopic ends of the two lower die clamping cylinders are fixedly connected with the two lower die clamping blocks through connecting pieces respectively, and lower plastic pieces are clamped and fixed under the combined action of the two lower die clamping blocks and the lower die positioning pieces;
the upper die clamp comprises an upper die plate, guide posts with the same number and positions as the guide sleeves are fixedly arranged at the lower end of the upper die plate, the upper die plate is fixedly arranged on an upper mounting plate through at least four upper die fixing pieces which are bilaterally symmetrical, an upper die positioning piece is fixedly arranged at the lower end of the upper die plate, two upper die clamping cylinders are arranged at the two sides of the upper die positioning piece, and the two upper die clamping cylinders are arranged on the upper die plate and clamp and fix an upper plastic piece under the combined action of the movement of the two upper die clamping cylinders and the upper die positioning piece;
The nitrogen heating middle die comprises a sealing box, a heating pipe is arranged in the sealing box, air needles are arranged on the sealing box, the air needles penetrate through the sealing box, middle die mounting plates are fixedly arranged on two sides of the sealing box, the middle die mounting plates on two sides are respectively and fixedly arranged on a left side mounting plate and a right side mounting plate through middle die fixing pieces, at least two nitrogen conveying pipes are arranged on the middle die mounting plates on one side, the output end of each nitrogen conveying pipe is connected with the air needles after passing through the sealing box, the input end of each nitrogen conveying pipe is connected with a nitrogen control device, the nitrogen control device comprises pressure reducing valves connected with the output ends of the nitrogen making machines, the output ends of the pressure reducing valves are connected with air dividing blocks, the air dividing blocks are provided with output pipelines with the same quantity as the nitrogen conveying pipes, the output pipelines flow into a flowmeter after passing through the throttle valves, and nitrogen after flowing into the nitrogen conveying pipes after flowing into the flowmeter;
The guide pillar of the upper die clamp is a conical guide pillar, the guide sleeve of the lower die clamp is a conical guide sleeve, the conical guide pillar is fixedly arranged at the lower end of the upper die plate through a guide pillar support, and the free end of the conical guide pillar is provided with a conical head which is in contact with the lower die clamp during die assembly; the conical guide sleeve comprises a guide sleeve positioning seat fixedly mounted on a lower template, a cushion block with a screw hole is fixedly mounted at the bottom end inside the guide sleeve positioning seat, a sliding guide sleeve is matched in the conical guide sleeve, a conical mounting hole matched with a conical head of a conical guide post is formed in the upper end of the sliding guide sleeve, a screw mounting hole is formed in the sliding guide sleeve below the conical mounting hole, a screw is mounted in the screw mounting hole, a spring is sleeved on the screw, the spring is arranged in the sliding guide sleeve, and when the spring is in a diastole state, the lower end of the sliding guide sleeve is in a suspension state.
2. The hot air welding plastic welding apparatus according to claim 1, wherein: the upper driving device comprises an upper servo motor fixedly arranged on a servo motor mounting plate, the servo motor mounting plate is arranged above the upper sliding table, two ends of the servo motor mounting plate are fixedly arranged on the first frame body and the second frame body, an output shaft of the upper servo motor is connected with an input shaft of an upper T-shaped speed reduction motor, two output shafts of the upper T-shaped speed reduction motor are respectively connected with input shafts of two upper right-angle speed reduction motors through a coupler and a connecting shaft, the two upper right-angle speed reduction motors are fixedly arranged on the servo motor mounting plate, output shafts of the two upper right-angle speed reduction motors are respectively fixedly connected with two upper ball screws, nuts of the two upper ball screws are fixedly arranged on the upper frame bodies, the other ends of the two upper ball screws are rotatably arranged in an upper screw mounting seat, and the upper screw mounting seat is fixedly arranged on the first frame body and the second frame body;
the lower driving device comprises a lower servo motor fixedly arranged on a base, an output shaft of the lower servo motor is connected with an input shaft of a lower T-shaped gear motor, output shafts at two ends of the lower T-shaped gear motor are respectively connected with input shafts of two lower right-angle gear motors through a coupler and a connecting shaft, the two lower right-angle gear motors are fixedly arranged on the base, output shafts of the two lower right-angle gear motors are respectively fixedly connected with two lower ball screws, nuts of the two lower ball screws are fixedly arranged on a lower frame body, the other ends of the two lower ball screws are rotatably arranged in lower screw mounting seats, and the lower screw mounting seats are fixedly arranged on a first frame body and a second frame body;
The left driving device comprises a left ball screw, one end of the left ball screw is fixedly provided with a synchronous pulley, one end of the left ball screw with the synchronous pulley is rotatably arranged in a mounting seat, the mounting seat of the left ball screw is fixedly arranged on an upper end cross beam of the third frame body and is arranged at the rear end of the third frame body, and a screw nut of the left ball screw is fixedly connected to a left mounting plate through a left connecting strip;
the right driving device comprises a right ball screw, one end of the right ball screw is fixedly provided with a synchronous pulley, one end of the right ball screw with the synchronous pulley is rotatably arranged in a mounting seat, the mounting seat of the right ball screw is fixedly arranged on an upper end cross beam of a fourth frame body and is arranged at the rear end of the fourth frame body, and a nut of the right ball screw is fixedly connected to a right side mounting plate through a right connecting strip;
The synchronous pulley at one end of the left ball screw and the synchronous pulley at one end of the right ball screw are meshed together on a synchronous belt, a servo motor provided with the synchronous pulley is meshed on the synchronous belt, and the servo motor is fixedly arranged on the third frame body.
3. The hot air welding plastic welding apparatus according to claim 1, wherein: the lower sliding table further comprises a lower anti-falling device and a lower displacement detection device, the lower anti-falling device comprises a lower stop cylinder, the lower stop cylinder is fixedly arranged on a lower frame body between the second frame body and the lower mounting plate, a lower stop clamping plate is fixedly arranged at the telescopic end of the lower stop cylinder and is slidably arranged on a lower stop sliding rail through a sliding block, the lower stop sliding rail is fixedly arranged on the lower frame body, when the telescopic end of the lower stop cylinder extends out, the lower stop clamping plate is driven to move from the lower frame body to the second frame body until being clamped on a stop shaft with a plurality of clamping steps, and the stop shaft is fixedly arranged on the second frame body and is perpendicular to the base; the lower displacement detection device comprises a lower displacement sensor, the lower displacement sensor is fixedly arranged on the first frame body and is perpendicular to the base, a lower displacement sensor sliding block is slidably arranged on the lower displacement sensor, and the lower displacement sensor sliding block is fixedly connected to the lower frame body through a lower sensor connecting plate;
The upper sliding table further comprises an upper anti-falling device and an upper displacement detection device, the upper anti-falling device comprises an upper stop cylinder, the upper stop cylinder is fixedly arranged on the upper frame body between the second frame body and the upper mounting plate, an upper stop clamping plate is fixedly arranged at the telescopic end of the upper stop cylinder and is slidably arranged on an upper stop sliding rail through a sliding block, the upper stop sliding rail is fixedly arranged on the upper frame body, and when the telescopic end of the upper stop cylinder extends out, the upper stop clamping plate is driven to move from the upper frame body to the second frame body until being clamped on a stop shaft; the upper displacement detection device comprises an upper displacement sensor, the upper displacement sensor is fixedly arranged on the first frame body and perpendicular to the base, an upper displacement sensor sliding block is slidably arranged on the upper displacement sensor, and the upper displacement sensor sliding block is fixedly connected to the upper frame body through an upper sensor connecting plate.
4. The hot air welding plastic welding apparatus according to claim 1, wherein: the lower die moving device comprises two fixing seats fixedly mounted on the lower die bottom plate, cams are arranged in mounting holes of the fixing seats, the fixing seats and the cams are fixedly mounted on a rotating shaft, a rotating shaft handle is fixedly mounted at one end of the rotating shaft, a rotating shaft sliding block is mounted in the fixing seat below the cams, and idler wheels are mounted below the rotating shaft sliding block.
5. The hot air welding plastic welding apparatus according to claim 1, wherein: the utility model discloses a hydraulic lifting device, including base, base rear end intermediate position, back, the district has been seted up to back the intermediate position of base rear end, back the district setting between third support body and fourth support body, back the district in be used for depositing hydraulic lifting device, be provided with the retooling frock that is used for changing the nitrogen gas heating well mould on the hydraulic lifting device, retooling frock includes the frock bottom plate that contacts with hydraulic lifting device, the frock stand is installed perpendicularly to the corner of frock bottom plate, frock stand upper end fixed mounting has the frock roof, back the intermediate position of frock roof has been seted up and has been dodged the through-hole, be provided with a plurality of spacing archs on the frock roof.
6. The hot air welding plastic welding apparatus according to claim 1, wherein: be provided with the frame body on the base, the frame body covers first support body, second support body, third support body, fourth support body, the rear of frame body is installed and is convenient for push away the electronic rolling slats door of getting hydraulic lift truck, the electric cabinet is installed to the side-mounting of frame body, the tower lamp that is used for air discharge fan and display device running state is installed to the upper end of frame body, the air discharge fan is connected with the air pipe of factory, pneumatic emergency exit is installed to the front end of frame body, install safe correlation grating on the frame body around the emergency exit, the operation touch-sensitive screen is still installed to the front end of frame body.
7. The hot air welding plastic welding apparatus according to claim 1, wherein: two handles are fixedly arranged on the lower die bottom plate, and the two handles are arranged at the front end of the lower die bottom plate.
8. Welding method of a hot air welding plastic welding apparatus according to any of the claims 1-7, characterized in that it comprises the steps of:
Step S1: upper part
The upper plastic piece and the lower plastic piece are respectively clamped and fixed by using an upper die clamp and a lower die clamp;
Step S11: clamping and fixing of upper plastic part
The operator takes the upper plastic part, the welding surface of the upper plastic part faces downwards, the non-welding surface of the upper plastic part faces upwards, the non-welding end of the upper plastic part is placed in the upper die positioning part, and the upper plastic part is clamped and fixed under the combined action of the upper die clamping cylinders and the upper die clamping jaws at the two sides;
Step S12: clamping and fixing of lower plastic part
The operator takes down the plastic part, the welding surface of the lower plastic part faces upwards, the non-welding surface of the lower plastic part faces downwards, the non-welding end of the lower plastic part is placed in the lower die positioning part, the lower die clamping cylinders at two sides are utilized to move to drive the lower die clamping blocks at two sides, and the lower plastic part is clamped and fixed under the combined action of the lower die positioning part and the lower die clamping blocks;
step S2: heating
Heating the welding surfaces of the upper plastic part and the lower plastic part by using a nitrogen heating middle die;
step S21: upper position of nitrogen heating middle mould
The left driving device and the right driving device are used for driving the middle sliding table to carry the nitrogen heating middle die to move to a preset position between the upper die clamp and the lower die clamp;
step S22: upper die clamp upper position
The upper sliding table is driven by the upper driving device to move downwards to a preset position above the middle mold adjacent to the nitrogen heating mold;
step S23: upper position of lower die clamp
The lower driving device is used for driving the lower sliding table to move upwards to a preset position below the middle die adjacent to the nitrogen heating die;
step S23: nitrogen supply and heating
The nitrogen is transmitted into a nitrogen control device by utilizing a nitrogen making machine, the nitrogen control device is used for controlling the pressure reduction, the gas distribution and the flow rate of the nitrogen, the nitrogen flowing out of the nitrogen control device is supplied into a gas needle of a nitrogen heating middle mold, the nitrogen is heated by utilizing a heating pipe, when the temperature of the nitrogen reaches the welding temperature, hot nitrogen is discharged by utilizing a gas needle penetrating through a sealing box, and the heating surface of an upper plastic part above the gas needle and the heating surface of a lower plastic part below the gas needle are heated by utilizing the hot nitrogen;
step S3: welding
Step S31: homing of a Nitrogen heated middle die
The left driving device and the right driving device are used for driving the middle sliding table to carry the nitrogen heating middle die to move out of a preset position between the upper die clamp and the lower die clamp to return to the original position, namely to be positioned above the rear end of the base;
Step S32: mold closing welding of upper plastic part welding surface and lower plastic part welding surface
The upper driving device and the lower driving device are used for respectively driving the upper die clamp and the lower die clamp to move relatively to a preset position, at the moment, the welding surface of the upper plastic part is completely contacted with the welding surface of the lower plastic part, and the guide pillar on the upper die plate is in butt joint with the guide sleeve on the lower die bottom plate;
Step S4: fetching part
Step S41: loosening of upper plastic parts
The upper die clamping cylinders on two sides are utilized to move, so that the upper plastic piece which is clamped and fixed is loosened;
Step S42: homing of upper die clamp
The upper driving device is used for driving the upper sliding table to move upwards to a preset position on the upper die clamp;
step S43: relaxation of lower plastic parts
The lower die clamping cylinders on two sides are utilized to move to drive the lower die clamping blocks on two sides to move outwards, the clamped and fixed lower plastic piece is loosened, and an operator takes down the welded plastic piece;
step S44: homing of lower die clamp
The lower driving device is used for driving the lower sliding table to move downwards to a preset position along with the lower die clamp;
step S5: die changing
When welding parts of different types are needed, the upper die clamp, the lower die clamp and nitrogen heating are performed
Changing the die;
step S51: die changing of nitrogen heating middle die
Step S511: taking out mould
The operation worker lifts the electric rolling door, pushes the hydraulic lifting vehicle to carry the die changing tool to the position below the nitrogen heating middle die, lifts the hydraulic lifting vehicle until the die changing tool and the nitrogen heating middle die are in contact with each other, loosens the middle die fixing piece, removes the electric aviation plug and the air aviation plug which are electrically connected with the nitrogen heating middle die and the equipment, continuously lifts the hydraulic lifting vehicle, enables the nitrogen heating middle die to be separated from the middle sliding table, moves the middle sliding table forward, lowers the hydraulic lifting vehicle, lowers the nitrogen heating middle die at the same time, pushes out the hydraulic lifting vehicle, and removes the original nitrogen heating middle die;
Step S512: changing new mould
The method comprises the steps of taking down an original nitrogen heating middle die, simultaneously placing a new nitrogen heating middle die, pushing a hydraulic lifting vehicle to the middle positions of a third frame body and a fourth frame body along a rolling door, lifting the hydraulic lifting vehicle, moving a middle sliding table backwards to two sides of the new nitrogen heating middle die, fixing the new nitrogen heating middle die by using a middle die fixing piece, installing an electric aviation plug and an air aviation plug which are electrically connected with equipment of the new nitrogen heating middle die, lowering the hydraulic lifting vehicle, and closing the electric rolling door;
step S52: die changing of upper die clamp and lower die clamp
Step S521: taking out mould
Performing die assembly operation on the upper die clamp and the lower die clamp, wherein a guide post of the upper die clamp is in butt joint with a guide sleeve of the lower die clamp;
The operator removes the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the upper die clamp, loosens the upper die fixing piece, moves the upper sliding table upwards, and enables the upper die clamp to be separated from the upper sliding table;
The locking button on the lower die clamp is loosened by an operator, the positioning pin is lifted, the electric aviation plug and the air aviation plug which are electrically connected with the equipment on the lower die clamp are detached, the roller is slipped out by using the lower die moving device, the handle is pulled to move the lower die clamp outwards, the lower die clamp and the upper die clamp roll out from the lower sliding table, and the lower die clamp and the upper die clamp are moved;
step S522: changing new mould
An operator moves the new upper die clamp and the new lower die clamp onto the lower sliding table, fixes the new lower die clamp onto the lower sliding table by utilizing a locking button and a positioning pin on the lower die clamp, and installs the electric aviation plug and the air aviation plug which are electrically connected with the equipment by the new lower die clamp;
the upper sliding table is moved downwards until the new upper die clamp is contacted with the upper sliding table, the upper die fixing piece is utilized to fix the new upper die clamp to the lower end of the upper sliding table, and the new upper die clamp is installed to be electrically connected with the electric aviation plug and the air aviation plug of the equipment.
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| CN112440477A (en) * | 2020-11-09 | 2021-03-05 | 苏州凯尔博精密机械有限公司 | Hot gas heating welding mechanism |
| CN112873690B (en) * | 2020-12-24 | 2022-11-22 | 江苏天辰智能装备有限公司 | Two-end lifting mechanism for motor type door body foaming line |
| CN113601853A (en) * | 2021-08-27 | 2021-11-05 | 常州大钧汽车零部件制造有限公司 | Welding device for vehicle oil cup |
| CN114851576B (en) * | 2022-04-25 | 2024-02-09 | 南通超达装备股份有限公司 | Intelligent infrared thermal welding equipment |
| CN115446506A (en) * | 2022-09-29 | 2022-12-09 | 苏州凯尔博精密机械有限公司 | Hot gas welding mechanism of automobile air suspension air chamber and welding process thereof |
| CN116512611A (en) * | 2023-04-25 | 2023-08-01 | 上海三束实业有限公司 | Synchronous laser welding equipment |
| CN116749532A (en) * | 2023-07-19 | 2023-09-15 | 湖北鑫鼎泰自动化科技有限公司 | Thermal calibration laser welding machine and thermal calibration welding method |
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| CN107498167B (en) * | 2017-09-21 | 2023-01-17 | 广州敏惠汽车零部件有限公司 | Special spot welding machine capable of sharing multiple door frame center pillars |
| CN107984765B (en) * | 2017-12-29 | 2024-01-26 | 苏州凯尔博科技股份有限公司 | Intelligent die change welding machine |
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