CN110947858A - Electro-hydraulic synchronous numerical control bending machine - Google Patents
Electro-hydraulic synchronous numerical control bending machine Download PDFInfo
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- CN110947858A CN110947858A CN201911345176.XA CN201911345176A CN110947858A CN 110947858 A CN110947858 A CN 110947858A CN 201911345176 A CN201911345176 A CN 201911345176A CN 110947858 A CN110947858 A CN 110947858A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/002—Positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/008—Bending sheet metal along straight lines, e.g. to form simple curves combined with heating or cooling of the bends
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- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention provides an electro-hydraulic synchronous numerical control bending machine which comprises a rack, a sliding plate, a die, a hydraulic system and a control system, wherein the rack comprises a left vertical plate and a right vertical plate which are oppositely arranged; the X-axis positioning device adopts double linear guide rails for positioning, and the R-axis positioning device adopts a linear guide rail and a square guide rod for guiding. The electro-hydraulic synchronous numerical control bending machine provided by the invention has the characteristics of stable and reliable work, accurate positioning and the like, is suitable for bending products of different models and specifications, and is strong in universality and convenient to operate.
Description
Technical Field
The invention relates to the technical field of bending machines, in particular to an electro-hydraulic synchronous numerical control bending machine.
Background
The bending machine is a mechanical device commonly used by mechanical device manufacturing enterprises, is mainly used for machining sheet metal parts, and has higher and higher requirements on the bending machine along with higher and higher requirements on machining precision.
When a plate is machined by the bending machine, the feeding size of the plate to be machined needs to be accurately positioned, so that a rear positioning device is generally installed at the rear part of a machine tool of the bending machine. In the prior art, the rear positioning device comprises an X-axis positioning device, an R-axis positioning device, a beam device and a stop finger moving left and right along the beam, the X-axis positioning device and the R-axis positioning device respectively drive the stop finger to move in the front-back direction and move vertically, and the stop finger is enabled to accurately position the position of a workpiece to be processed through a plurality of positioning devices. However, in the prior art, the X-axis positioning device adopts a single linear guide rail for guiding, and when the bearing capacity of the guide rail is large, the slide block is easy to droop, so that the precision is insufficient when the X-axis linear motion is performed; the R shaft positioning device adopts a round guide rod and a gear transmission rack guide device for guiding, the positioning precision cannot be achieved due to the fact that gear transmission is gapped, the guide rod and copper sleeve structure can generate abrasion gaps after long-term operation, the quality of a bent product cannot be guaranteed, and the copper sleeve is not impact-resistant and is easy to damage.
Moreover, in the bending machine in the prior art, different dies need to be adopted for sheet metal parts of different models and specifications, the die cost is high, and the die replacement is inconvenient.
In view of the above, it is necessary to provide a new bending machine to solve the above technical problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing an electro-hydraulic synchronous numerical control bending machine which has the characteristics of stable and reliable work, accurate positioning and the like, is suitable for bending products of different models and specifications, and has strong universality and convenient operation.
In order to solve the problems, the technical scheme of the invention is as follows:
an electro-hydraulic synchronous numerical control bending machine comprises a frame, a sliding plate, a die, a hydraulic system, a control system and a rear positioning device, the machine frame comprises a left vertical plate, a right vertical plate and a workbench vertical plate which is fixed between the left vertical plate and the right vertical plate which are arranged oppositely, a working table top is arranged on the vertical plate of the working table, the oil cylinder of the hydraulic system drives the sliding plate to slide along the sliding guide rails of the left vertical plate and the right vertical plate in the direction vertical to the working table top, the die comprises an upper die and a lower die, the upper die is arranged at the bottom of the sliding plate, the lower die is arranged on the surface of the worktable, the rear positioning device comprises two groups of X-axis positioning devices fixed on the left vertical plate and the right vertical plate, R-axis positioning devices correspondingly connected with the two groups of X-axis positioning devices, a cross beam connected with the two groups of R-axis positioning devices, and a four-stage finger blocking device connected with the cross beam and capable of sliding along the extending direction of the cross beam;
the X-axis positioning device comprises an X-axis wallboard connected with a left vertical plate or a right vertical plate, a first linear guide rail and a second linear guide rail which are fixed on the X-axis wallboard and are oppositely arranged at intervals, an X-axis screw rod arranged on the X-axis wallboard, a first driving device for driving the X-axis screw rod to rotate, a nut seat arranged on the X-axis screw rod, and an X-axis sliding plate fixedly connected with the nut seat and slidably connected with the first linear guide rail and the second linear guide rail;
the R-axis positioning device comprises an R-axis seat which is connected with the X-axis sliding plate and is provided with a sliding groove, an R-axis lead screw which penetrates through the R-axis seat and is in matched connection with the R-axis seat, a cross beam connecting plate which is connected with the R-axis lead screw, a second driving device which drives the R-axis lead screw to rotate so as to enable the cross beam connecting plate to carry out lifting motion, a third linear guide rail which is connected to the sliding groove of the R-axis seat, and a square guide rod which is arranged in the sliding groove and is in sliding connection with the third linear guide rail, wherein one end of the square guide rod is connected with the cross beam;
the beam comprises a fourth linear guide rail arranged along the extending direction of the beam, the fourth-stage finger blocking device comprises a mounting plate in sliding connection with the fourth linear guide rail, a sliding plate arranged on the mounting plate and capable of sliding relative to the mounting plate, an adjusting screw rod arranged at the end part of the mounting plate and used for adjusting the relative position of the mounting plate and the sliding plate, a blocking finger connected with one end of the sliding plate and arranged opposite to the adjusting screw rod, and an eccentric blocking column penetrating through the sliding plate and used for adjusting the position, wherein the blocking finger comprises a blocking finger rear section in rotatable connection with the end part of the sliding plate, a first-stage finger blocking finger, a second-stage finger blocking finger and a third-stage finger blocking finger which are connected with the blocking finger rear section and distributed in;
the rear positioning device also comprises a pneumatic spring, one end of the pneumatic spring is connected with the X-axis sliding plate, and the other end of the pneumatic spring is connected with the beam connecting plate.
Further, the R-axis positioning device further comprises a beam adjusting plate connected with the beam connecting plate, the beam adjusting plate is perpendicular to the beam connecting plate, and the beam adjusting plate is adjusted through an adjusting bolt without offsetting the position of the beam.
Furthermore, the R shaft seat is integrally square.
Furthermore, the R-axis positioning device further comprises an upper cushion pad fixed on the R-axis lead screw and located between the beam connecting plate and the R-axis seat, a limiting portion connected with the bottom of the square guide rod, and a lower cushion pad arranged on the limiting portion and located below the R-axis seat.
Furthermore, the limiting part comprises a bottom plate and a side plate bent and extended from one side of the bottom plate, the lower cushion pad is arranged on the bottom plate, and the R shaft seat is located on the inner side of the side plate.
Further, the end of the adjusting screw is provided with a dial.
Furthermore, a straightness adjusting device is arranged on the sliding plate, and the straightness adjusting device comprises a rib plate which is connected with the sliding plate and the extending direction of the rib plate is perpendicular to the moving direction of the sliding plate, and a plurality of adjusting bolts arranged on the rib plate.
Furthermore, the rack also comprises an oil tank support frame connected with the left vertical plate and the right vertical plate, and the oil tank support frame comprises a support bottom plate and support side plates connected with two side edges of the support bottom plate;
the hydraulic system comprises an oil tank, an oil pump motor device connected with the oil tank, an electromagnetic valve connected with an output pipe of the oil pump motor device, and an oil cylinder connected with a liquid supply output end of the electromagnetic valve, wherein the oil cylinder drives the sliding plate to slide, and a liquid return end of the electromagnetic valve is connected with the oil tank; the oil tank is fixedly connected with one supporting side plate, the oil pump motor device is supported on the supporting bottom plate, and a notch is formed in the position, corresponding to the oil pump motor device, of the other supporting side plate. .
Furthermore, the oil tank is flat, and grids are respectively arranged on two sides of an oil suction port of the oil pump motor in the oil tank.
Furthermore, the number of the oil cylinders is two, and the two oil cylinders are distributed on two sides of the sliding plate; the liquid filling ports of the oil tank are distributed on two sides of the oil tank and are respectively arranged close to the oil cylinders at corresponding positions.
Compared with the prior art, the electro-hydraulic synchronous numerical control bending machine provided by the invention has the beneficial effects that:
according to the electro-hydraulic synchronous numerical control bending machine, the X-axis positioning device in the rear positioning device adopts the double linear guide rails, so that the bearing capacity of the linear guide rails is increased, and the stability of the R-axis positioning device connected with the X-axis positioning device is ensured; the R-axis positioning device adopts a guide device with a structure of matching a linear guide rail and a square guide rod, and the contact area of the linear guide rail and the square guide rod in the guide device is increased compared with the prior art, so that the stress uniformity and the guide accuracy of the R-axis are ensured, and the positioning accuracy is further ensured; meanwhile, the linear guide rail has strong impact resistance and long service life; and a pneumatic spring is arranged between the X-axis sliding plate and the beam connecting plate and is used for balancing the weight of the beam, so that the transmission power of a driving device of the R-axis positioning device is reduced, and the energy is saved.
The four-level blocking finger device is connected with the beam, blocking fingers in the four-level blocking finger device are rotatably connected with the sliding plate and comprise first-level blocking fingers, second-level blocking fingers and third-level blocking fingers which are distributed in a step mode, the positioning of the third-level blocking fingers can be achieved by rotating the blocking fingers, eccentric blocking columns are arranged on the sliding plate and serve as fourth-level positioning of the blocking fingers, only a universal die is used in product processing, the die is low in cost and convenient to replace, and therefore the four-level blocking finger device can achieve bending of products of different models and specifications, particularly ultra-wide products, by the aid of the universal die.
According to the electro-hydraulic synchronous numerical control bending machine, the beam adjusting plate is arranged on the R-axis positioning device, the beam adjusting plate adjusts the position of the beam through the adjusting bolt to be not deviated, and the stability of the R axis is guaranteed; the R shaft seat in the R shaft positioning device is integrally square, so that the strength of the R shaft seat is increased, and compared with a 7-shaped R shaft seat structure in the prior art, the R shaft positioning device can prevent the deformation caused by heavy weight of the cross beam, and further ensure the positioning accuracy of the R shaft; the R-shaft positioning device further comprises an upper cushion pad positioned between the beam connecting plate and the R-shaft seat, a limiting portion connected with the bottom of the square guide rod, and a lower cushion pad arranged on the limiting portion and positioned below the R-shaft seat, so that the stability of the R-shaft positioning device is further improved.
According to the electro-hydraulic synchronous numerical control bending machine, the end part of the adjusting screw rod of the four-stage stop finger device is provided with the dial, accurate fine adjustment can be achieved through the dial, and the positioning accuracy is further improved.
The electro-hydraulic synchronous numerical control bending machine is characterized in that the sliding plate is provided with a straightness adjusting device, and after deformation occurs after long-term use of the machine tool, the machine tool is adjusted through the straightness adjusting device, so that the straightness of the sliding plate is guaranteed, and further the product quality is guaranteed.
According to the electro-hydraulic synchronous numerical control bending machine, the oil pump motor device and the oil tank in the hydraulic system are respectively fixed on the supporting bottom plate and the supporting side plate of the oil tank supporting frame, and the oil tank supporting frame is fixed with the left vertical plate and the right vertical plate, so that the resonance phenomenon generated between the motor and the oil tank during operation is avoided, and the noise is reduced; a notch is formed in the position, corresponding to the oil pump motor device, of the supporting side plate of the oil tank supporting frame, so that heat dissipation and noise dispersion of the motor are facilitated; the oil tank is designed to be flat, so that the contact area between oil and the oil tank is increased, the heat dissipation of the oil is facilitated, and the working oil temperature of the bending machine is not too high; the grids are respectively arranged on the two sides of the oil suction port of the oil pump motor in the oil tank, so that oil is favorably divided, oil with air is not sucked by the pump at once, and oil with impurities is cut off, so that the oil has sufficient time to precipitate, and the stability of a hydraulic system is ensured; the liquid filling ports of the oil tank are distributed on two sides of the oil tank and are respectively arranged close to the oil cylinders at corresponding positions, and the distance between the liquid filling ports and the oil cylinders is shorter when the distance is closer to the liquid filling time, so that the speed is faster and more stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an electro-hydraulic synchronous numerical control bending machine provided by the invention;
FIG. 2 is a schematic view of another angle structure of the electro-hydraulic synchronous numerical control bending machine shown in FIG. 1;
FIG. 3 is a schematic view of another angle of the slide plate in the electro-hydraulic synchronous numerical control bending machine shown in FIG. 1;
FIG. 4 is a schematic structural diagram of an X-axis positioning device in the electro-hydraulic synchronous numerical control bending machine shown in FIG. 2;
FIG. 5 is a schematic view of an alternate angle of the X-axis positioning apparatus of FIG. 4;
FIG. 6 is a schematic structural diagram of an R-axis positioning device in the electro-hydraulic synchronous numerical control bending machine shown in FIG. 2;
FIG. 7 is a schematic view of another angular configuration of the R-axis positioning device of FIG. 6;
FIG. 8 is a schematic cross-sectional view of the R-axis positioning device of FIG. 6 taken along line A-A;
FIG. 9 is a schematic structural view of an R-axis seat in the R-axis positioning device shown in FIG. 6;
FIG. 10 is a schematic structural diagram of a four-stage stop finger device in the electro-hydraulic synchronous numerical control bending machine shown in FIG. 2;
FIG. 11 is a schematic cross-sectional view of the fourth finger device of FIG. 10 taken along line B-B.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described below with reference to the accompanying drawings.
It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Please refer to fig. 1 and fig. 2 in combination, wherein fig. 1 is a schematic structural diagram of an electro-hydraulic synchronous numerical control bending machine provided by the present invention; fig. 2 is a schematic structural diagram of another angle of the electro-hydraulic synchronous numerical control bending machine shown in fig. 1. The electro-hydraulic synchronous numerical control bending machine 100 comprises a frame 1, a sliding plate 2, a die 3, a hydraulic system 4, a control system 5 and a rear positioning device 6, and the structure of each part is explained in detail below.
The machine frame 1 comprises a left vertical plate 11 and a right vertical plate 12 which are oppositely arranged, a workbench vertical plate 13 fixed between the left vertical plate 11 and the right vertical plate 12, and an oil tank support frame 14 connected with the left vertical plate 11 and the right vertical plate 12, wherein a workbench surface 15 is arranged on the workbench vertical plate 13.
The oil tank support frame 14 is a U-shaped groove structure, and includes a support base plate 141 and support side plates 142 connected to two side edges of the support base plate 141, and the connection relationship between the oil tank support frame 14 and the oil tank is as follows.
And brass and graphite guide devices are arranged on the same side of the left vertical plate 11 and the right vertical plate 12, and the sliding plate 2 is in sliding connection with the brass and graphite guide devices and moves up and down along the brass and graphite guide devices.
Please refer to fig. 3, which is a schematic structural diagram of another angle of the slide plate in the electro-hydraulic synchronous numerical control bending machine shown in fig. 1. The slide plate 2 is provided with a straightness adjusting device 21, and after the machine tool is deformed after long-term use, the straightness adjusting device 21 is used for adjusting to ensure the straightness of the slide plate and further ensure the product quality. In this embodiment, the straightness adjusting device 21 includes a rib 211 connected to the sliding plate 1 and having an extending direction perpendicular to a moving direction of the sliding plate, and a plurality of adjusting bolts 212 disposed on the rib 211, and the bending deformation of the sliding plate 2 is realized by the adjusting bolts on the adjusting rib, so as to ensure the straightness of the sliding plate. Preferably, the straightness adjusting means is provided on the back of the slide plate 2.
The die 3 comprises an upper die 31 and a lower die 32, the upper die 31 is connected with the bottom of the sliding plate 2 through a rotary wrench type quick clamp, and the lower die 32, a die holder and a die pad are assembled and installed on the working table surface 15.
The hydraulic system 4 comprises an oil tank 41, an oil pump motor device 42 connected with the oil tank 41, an electromagnetic valve 43 connected with an output pipe of the oil pump motor device 42, and an oil cylinder 44 connected with a liquid supply output end of the electromagnetic valve 43, wherein a liquid return end of the electromagnetic valve 43 is connected with the oil tank 41; the number of the oil cylinders 44 is two, and the two oil cylinders are respectively distributed on two sides of the sliding plate 2, and the oil cylinders 44 drive the sliding plate 2 to slide. The piping connection of the hydraulic system can refer to the prior art, and is not described herein.
In the invention, the oil tank 41 is fixedly connected with one supporting side plate 142, the oil pump motor device 42 is supported on the supporting bottom plate 141 of the oil tank supporting frame 14, wherein the oil tank 41 is flat, the contact area between oil and the oil tank is increased, thus being beneficial to the heat dissipation of the oil, and the oil temperature of the working of the bending machine is ensured not to be too high; grids (not shown) are respectively arranged on two sides of an oil suction port of an oil pump motor in the oil tank 41, so that oil can be divided, oil with air can not be sucked by a pump immediately, and oil with impurities is blocked, so that the oil can be deposited for a sufficient time, and the stability of a hydraulic system is ensured; the liquid filling ports 411 of the oil tank 41 are distributed on two sides of the oil tank and are respectively arranged close to the oil cylinders 44 at corresponding positions, and the distance between the liquid filling ports 411 and the oil cylinders is shorter as the liquid filling time is shorter, so that the speed is faster and more stable.
In the embodiment, the oil tank 41 and the oil pump motor device 42 are separately installed and are not in direct contact, so that the resonance phenomenon generated between the motor and the oil tank during operation is avoided, and the noise is reduced; and the supporting bottom plate 141 and the supporting side plate 142 which are provided with the two are respectively connected with the left vertical plate 11 and the right vertical plate 12, so that the connecting strength is increased, and the resonance phenomenon can disappear.
Meanwhile, a gap 143 is formed at a position of the other supporting side plate 142 corresponding to the oil pump motor device 42, which is beneficial to heat dissipation and noise dispersion of the motor; preferably, the notch 143 is U-shaped.
The control system 5 is disposed at one side of the frame 1, and is used for controlling the operation of the hydraulic system, the rear positioning device, and other components.
The rear positioning device 6 is used for enabling the stop finger to accurately position the position of the workpiece to be machined and comprises an X-axis positioning device 61, an R-axis positioning device 62, a cross beam 63 and a four-stage stop finger device 64. The two groups of X-axis positioning devices 61 are respectively fixed on the left vertical plate 11 and the right vertical plate 12, the two groups of R-axis positioning devices 62 are respectively connected with the X-axis positioning devices 61 at corresponding positions, the cross beam 63 is used for connecting the two groups of R-axis positioning devices 61 opposite to each other, and the four-stage finger blocking device 64 is connected with the cross beam 63 in a sliding manner. The structure of the rear positioning device 6 will be described in detail below.
Please refer to fig. 4 and fig. 5 in combination, wherein fig. 4 is a schematic structural diagram of an X-axis positioning device in the electro-hydraulic synchronous numerical control bending machine shown in fig. 2; FIG. 5 is a schematic view of another angular configuration of the X-axis positioning device shown in FIG. 4. The X-axis positioning device 61 includes an X-axis wall 611 connected to the left vertical plate 11 or the right vertical plate 12, a first linear guide 612 and a second linear guide 613 fixed to the X-axis wall 611 and disposed at an interval, an X-axis lead screw 614 mounted to the X-axis wall 611, a first driving device 615 for driving the X-axis lead screw 614 to rotate, a nut seat 617 mounted to the X-axis lead screw 614, and an X-axis sliding plate 618 fixedly connected to the nut seat 617 and slidably connected to the first linear guide 612 and the second linear guide 613, wherein the X-axis sliding plate 618 is connected to the R-axis positioning device 62. The extending directions of the first linear guide 612, the second linear guide 613 and the X-axis lead 614 are the same, and the working principle of the X-axis positioning device 61 is as follows: the first driving device 615 rotates the X-axis lead screw 614 to linearly displace the nut seat 617, thereby driving the X-axis sliding plate 618 to slide along the first linear guide 612 and the second linear guide 613.
The X-axis wallboard 611 is fixed with the left vertical plate 11 or the right vertical plate 12 through four mounting bolts, and the joints of the mounting bolts and the X-axis wallboard 611 are connected through spherical washers.
The X-axis lead screw 614 is connected to the X-axis wall 611 through a bearing and a bearing seat, and the connection relationship is the prior art and is not described herein.
The forward and reverse rotation of the first driving device 615 drives the X-axis sliding plate 618 to slide back and forth along the first and second linear guides 612 and 613. It should be noted that the first driving device 615 includes a servo motor and a synchronous pulley connected to an output shaft of the servo motor, and the first driving device 615 only shows a synchronous pulley structure in the drawings, and the principle and structure thereof are related to the prior art, so that the description thereof will not be repeated.
Please refer to fig. 6 to 9 in combination, wherein fig. 6 is a schematic structural diagram of an R-axis positioning device in the electro-hydraulic synchronous numerical control bending machine shown in fig. 2; FIG. 7 is a schematic view of another angular configuration of the R-axis positioning device of FIG. 6; FIG. 8 is a schematic cross-sectional view of the R-axis positioning device of FIG. 6 taken along line A-A; fig. 9 is a schematic structural view of an R-axis seat in the R-axis positioning device shown in fig. 6. The R-axis positioning device 62 includes an R-axis seat 622 having a sliding slot 621, an R-axis screw 623 penetrating through the R-axis seat 622 and connected to the R-axis screw 623 in a matching manner, a beam connecting plate 624 connected to the R-axis screw 623, a second driving device 625 driving the R-axis screw 623 to rotate so as to enable the beam connecting plate 624 to perform a lifting motion, a third linear guide 626 connected to the sliding slot 621 of the R-axis seat 622, and a square guide rod 627 disposed in the sliding slot 621 and slidably connected to the third linear guide 626, wherein the R-axis seat 622 is connected to the X-axis sliding plate 618, the beam connecting plate 624 is used for connecting the beam 63, and one end of the square guide rod 627 is connected to the beam.
The operating principle of the R-axis positioning device 62 is: the second driving device 625 drives the R-axis screw 623 to rotate, so that the beam connecting plate 624 generates a lifting motion, and the beam 63 connected with the beam connecting plate 624 is driven to generate a lifting motion. One end of the square guide rod 627 is connected with the beam connecting plate 624, so that the lifting movement of the beam 63 is guided.
In the invention, the R-axis positioning device 62 adopts a guide device with a structure of matching a linear guide rail and a square guide rod, and the contact area of the linear guide rail and the square guide rod in the guide device is increased compared with the prior art, so that the stress uniformity and the guide accuracy of the R axis are ensured, and the positioning accuracy is further ensured; meanwhile, the linear guide rail has strong impact resistance and long service life.
In order to optimize the stability of the R-axis positioning device 62, preferably, the R-axis positioning device further includes a beam adjusting plate 628 connected to the beam connecting plate 624, the beam adjusting plate 628 is disposed perpendicular to the beam connecting plate 624, and the beam 63 and the R-axis positioning device 62 are adjusted by an adjusting bolt so that the beam position is not shifted and the stability of the R-axis is ensured.
Further preferably, the R-axis seat 622 is square as a whole, please refer to fig. 9, the square R-axis seat increases the strength of the R-axis seat, and compared with the prior art that the R-axis seat is 7-shaped, the R-axis seat can prevent the deformation caused by the heavy weight of the cross beam, and further ensure the positioning accuracy of the R-axis.
Furthermore, the R-axis positioning device 62 further includes an upper cushion 629a located between the cross beam connecting plate 624 and the R-axis seat 622, a limiting portion 620 connected to the bottom of the square guide rod 627, and a lower cushion 629b located below the limiting portion 620 and the R-axis seat 622, so as to further improve the stability of the R-axis positioning device. Wherein the upper cushion 629a is used to provide a cushioning force when the beam connecting plate 624 comes into contact with the R-axis seat 622 during the lowering process; the limiting portion 620 is used for limiting the maximum stroke of the guide rod 627, so that the maximum lifting stroke of the guide rod is that the bottom of the guide rod is flush with the R-axis seat 622, and the lower cushion pad 629b is used for providing a buffering acting force when the limiting portion 620 contacts with the R-axis seat 622.
In this embodiment, the limiting portion 620 includes a bottom plate 6201 and a side plate 6202 extending from one side of the bottom plate 6201, the lower cushion pad 629b is disposed on the bottom plate 6201, and the R-axis seat 622 is disposed on the inner side of the side plate 6202.
In the invention, the rear positioning device 6 further comprises a pneumatic spring 65 connected with the X-axis positioning device 61 and the R-axis positioning device 62, and the pneumatic spring 65 is arranged for balancing the weight of the cross beam 63, so that the transmission power of a driving device of the R-axis positioning device 62 is reduced, and the energy is saved. Specifically, one end of the pneumatic spring 65 is connected to the X-axis slide plate 618, and the other end is connected to the beam connection plate 624.
The cross member 63 includes a fourth linear guide 631 provided along the extending direction thereof, and the fourth shift finger device 64 slides along the fourth linear guide 631.
Please refer to fig. 10 and fig. 11 in combination, wherein fig. 10 is a schematic structural diagram of a four-stage stop finger device in the electro-hydraulic synchronous numerical control bending machine shown in fig. 2; FIG. 11 is a schematic cross-sectional view of the fourth finger device of FIG. 10 taken along line B-B. The fourth-stage finger stopping device 64 comprises a mounting plate 641 slidably connected to the fourth linear guide 631, a sliding plate 642 provided on the mounting plate 641 and slidable relative to the mounting plate, an adjusting screw 643 provided at an end of the mounting plate 641 and connected to the sliding plate 642, a finger 644 connected to an end of the sliding plate 642 and disposed opposite to the adjusting screw 643, and an eccentric finger 645 penetrating the sliding plate 642 for positioning, wherein the finger 644 comprises a finger stopping rear section 6441 rotatably connected to the end of the sliding plate 642, a first-stage finger stopping 6442 connected to the finger stopping rear section 6441 and distributed in a stepped manner, a second-stage finger stopping 6443, and a third-stage finger stopping 6444.
In the present invention, the mounting plate 641 is provided with a slide groove so that the slide plate 642 can slide relative to the mounting plate 641, and after the position of the slide plate 642 is adjusted, the position of the slide plate 642 is fixed by a fastening bolt. The sliding direction of the sliding plate 642 is perpendicular to the extending direction of the fourth linear guide 631, a push-pull plate 647 is connected to the end of the sliding plate 642, and an adjusting screw 643 connects the push-pull plate 647 and the mounting plate 641 to adjust the relative position of the mounting plate 641 and the sliding plate 642. Preferably, a dial 6431 is provided at an end of the adjusting screw 643, and the dial 6431 can realize precise fine adjustment, thereby further improving the positioning precision.
The blocking finger rear section 6441 is rotationally connected with the sliding plate 642 through the cylindrical pin 646, the blocking finger rear section 6441 rotates to drive the first-stage blocking finger 6442, the second-stage blocking finger 6443 and the third-stage blocking finger 6444 to rotate together, and therefore proper blocking fingers can be selected to be positioned according to the type and the specification of a workpiece to be machined; the eccentric blocking columns 645 arranged on the sliding plate 642 are used for fourth-stage positioning of the blocking fingers 644, only a universal mold is needed in product processing, the mold is low in cost and convenient to replace, and therefore, by adopting the fourth-stage blocking finger device, bending of products of different models and different specifications, especially ultra-wide products can be achieved by adopting the universal mold.
In the present invention, the fourth finger device 64 can be manually or electrically displaced.
It should be noted that, besides the above structure, the electrohydraulic synchronous numerical control bending machine of the present invention further includes components such as a grating ruler, a foot switch device, etc., and the structure of the electrohydraulic synchronous numerical control bending machine is not a key point of the present invention, so that the description is not made in the specification, and the specific structure refers to relevant contents in the prior art.
In conclusion, the electro-hydraulic synchronous numerical control bending machine provided by the invention has the characteristics of stable and reliable work, accurate positioning and the like, is suitable for bending products of different models and specifications, and is strong in universality and convenient to operate.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and alterations to these embodiments will occur to those skilled in the art without departing from the spirit and scope of the present invention.
Claims (10)
1. An electro-hydraulic synchronous numerical control bending machine comprises a frame, a sliding plate, a die, a hydraulic system, a control system and a rear positioning device, the machine frame comprises a left vertical plate, a right vertical plate and a workbench vertical plate which is fixed between the left vertical plate and the right vertical plate which are arranged oppositely, a working table top is arranged on the vertical plate of the working table, the oil cylinder of the hydraulic system drives the sliding plate to slide along the sliding guide rails of the left vertical plate and the right vertical plate in the direction vertical to the working table top, the die comprises an upper die and a lower die, the upper die is arranged at the bottom of the sliding plate, the lower die is arranged on the surface of the worktable, the rear positioning device comprises two groups of X-axis positioning devices fixed on the left vertical plate and the right vertical plate, R-axis positioning devices correspondingly connected with the two groups of X-axis positioning devices, a cross beam connected with the two groups of R-axis positioning devices, and a four-stage finger blocking device connected with the cross beam and capable of sliding along the extending direction of the cross beam;
the X-axis positioning device comprises an X-axis wallboard connected with a left vertical plate or a right vertical plate, a first linear guide rail and a second linear guide rail which are fixed on the X-axis wallboard and are oppositely arranged at intervals, an X-axis screw rod arranged on the X-axis wallboard, a first driving device for driving the X-axis screw rod to rotate, a nut seat arranged on the X-axis screw rod, and an X-axis sliding plate fixedly connected with the nut seat and slidably connected with the first linear guide rail and the second linear guide rail;
the R-axis positioning device comprises an R-axis seat which is connected with the X-axis sliding plate and is provided with a sliding groove, an R-axis lead screw which penetrates through the R-axis seat and is in matched connection with the R-axis seat, a cross beam connecting plate which is connected with the R-axis lead screw, a second driving device which drives the R-axis lead screw to rotate so as to enable the cross beam connecting plate to carry out lifting motion, a third linear guide rail which is connected to the sliding groove of the R-axis seat, and a square guide rod which is arranged in the sliding groove and is in sliding connection with the third linear guide rail, wherein one end of the square guide rod is connected with the cross beam;
the beam comprises a fourth linear guide rail arranged along the extending direction of the beam, the fourth-stage finger blocking device comprises a mounting plate in sliding connection with the fourth linear guide rail, a sliding plate arranged on the mounting plate and capable of sliding relative to the mounting plate, an adjusting screw rod arranged at the end part of the mounting plate and used for adjusting the relative position of the mounting plate and the sliding plate, a blocking finger connected with one end of the sliding plate and arranged opposite to the adjusting screw rod, and an eccentric blocking column penetrating through the sliding plate and used for adjusting the position, wherein the blocking finger comprises a blocking finger rear section in rotatable connection with the end part of the sliding plate, a first-stage finger blocking finger, a second-stage finger blocking finger and a third-stage finger blocking finger which are connected with the blocking finger rear section and distributed in;
the rear positioning device also comprises a pneumatic spring, one end of the pneumatic spring is connected with the X-axis sliding plate, and the other end of the pneumatic spring is connected with the beam connecting plate.
2. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein the R-axis positioning device further comprises a beam adjusting plate connected with the beam connecting plate, the beam adjusting plate is perpendicular to the beam connecting plate, and the beam adjusting plate adjusts the position of the beam through an adjusting bolt so as not to deviate.
3. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein the R-axis seat is square in shape as a whole.
4. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein the R-axis positioning device further comprises an upper cushion pad fixed to the R-axis lead screw and located between the beam connecting plate and the R-axis seat, a limiting portion connected with the bottom of the square guide rod, and a lower cushion pad arranged on the limiting portion and located below the R-axis seat.
5. The electro-hydraulic synchronous numerical control bending machine according to claim 4, wherein the limiting part comprises a bottom plate and a side plate bent and extended from one side of the bottom plate, the lower cushion pad is arranged on the bottom plate, and the R shaft seat is located on the inner side of the side plate.
6. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein a dial is arranged at the end of the adjusting screw.
7. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein the sliding plate is provided with a straightness adjusting device, and the straightness adjusting device comprises a rib plate which is connected with the sliding plate and has an extending direction perpendicular to a moving direction of the sliding plate, and a plurality of adjusting bolts arranged on the rib plate.
8. The electro-hydraulic synchronous numerical control bending machine according to claim 1, wherein the frame further comprises an oil tank support frame connected with the left vertical plate and the right vertical plate, and the oil tank support frame comprises a support bottom plate and support side plates connected with two side edges of the support bottom plate;
the hydraulic system comprises an oil tank, an oil pump motor device connected with the oil tank, an electromagnetic valve connected with an output pipe of the oil pump motor device, and an oil cylinder connected with a liquid supply output end of the electromagnetic valve, wherein the oil cylinder drives the sliding plate to slide, and a liquid return end of the electromagnetic valve is connected with the oil tank; the oil tank is fixedly connected with one supporting side plate, the oil pump motor device is supported on the supporting bottom plate, and a notch is formed in the position, corresponding to the oil pump motor device, of the other supporting side plate.
9. The electro-hydraulic synchronous numerical control bending machine according to claim 8, wherein the oil tank is flat, and grids are respectively arranged on two sides of an oil suction port of the oil pump motor in the oil tank.
10. The electro-hydraulic synchronous numerical control bending machine according to claim 8, wherein two oil cylinders are arranged on two sides of the sliding plate; the liquid filling ports of the oil tank are distributed on two sides of the oil tank and are respectively arranged close to the oil cylinders at corresponding positions.
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| CN201911345176.XA CN110947858A (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic synchronous numerical control bending machine |
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| CN201911345176.XA CN110947858A (en) | 2019-12-24 | 2019-12-24 | Electro-hydraulic synchronous numerical control bending machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120268851A (en) * | 2025-06-12 | 2025-07-08 | 常州锦晟源机电设备有限公司 | Hydraulic bending machine convenient to position and used for processing steel plate |
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