CN110587093B - Automatic welding equipment for resistance welding of IC card - Google Patents
Automatic welding equipment for resistance welding of IC card Download PDFInfo
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- CN110587093B CN110587093B CN201910757053.0A CN201910757053A CN110587093B CN 110587093 B CN110587093 B CN 110587093B CN 201910757053 A CN201910757053 A CN 201910757053A CN 110587093 B CN110587093 B CN 110587093B
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- 238000003466 welding Methods 0.000 title claims abstract description 308
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 230000006835 compression Effects 0.000 claims description 20
- 238000007906 compression Methods 0.000 claims description 20
- 229910000679 solder Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 7
- 238000009966 trimming Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims 1
- 210000003128 head Anatomy 0.000 description 118
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 210000001331 nose Anatomy 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/25—Monitoring devices
- B23K11/252—Monitoring devices using digital means
- B23K11/255—Monitoring devices using digital means the measured parameter being a force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
- B23K11/312—Electrode holders and actuating devices therefor for several electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/36—Auxiliary equipment
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Abstract
The invention discloses an automatic welding device for resistance welding of an IC card, which comprises a plurality of resistance welding devices, an automatic spot welding operation table for the IC card and an automatic spot welding control device. The automatic spot welding operation table for the IC card comprises an operation table bottom plate, two Y-axis sliding tables and an X-axis sliding table, wherein the two Y-axis sliding tables are installed on the operation table bottom plate, the X-axis sliding table is installed above the two Y-axis sliding tables through a gantry support, a plurality of pulse output transformers are installed on an automatic pulley of the X-axis sliding table in a horizontal mode, and a plurality of automatic spot welding machine heads are installed on the outer side of the automatic pulley beside the pulse transformers in a hanging mode. The invention also installs the electric connection pre-pressure electrode force display circuit and electrode force display detection circuit on the spot welding machine head; mounting a welding head clamp at the lower end of the front sliding shaft in a fastening mode and on the middle shaft extension shaft in a sliding mode; two rear sliding shafts are arranged on the machine head frame, and the machine head frame is arranged between the upper end face and the lower end face of the groove-shaped rear seat through the two rear sliding shafts, so that the machine head frame is changed into a movable component of the spot welding machine head.
Description
Technical Field
The invention belongs to the field of resistance welding spot welding and the field of automation and intellectualization, and particularly relates to automatic welding equipment for resistance welding of an IC card.
Background
In the prior art, in the resistance welding automatic spot welding, an automatic spot welding machine head is arranged on a pulley of an X-axis automatic sliding table, a spot welding machine host provided with a pulse transformer is arranged outside an automatic spot welding operation table, and the pulse output transformer on the spot welding machine host is electrically connected with a welding head clamp on the automatic spot welding machine head through two large output cables. Because the pulse output transformer installed in the main machine of the spot welding machine does not move along with the automatic spot welding machine head, the output cable needs to be very long, often more than 200 cm. When a plurality of micro resistance welding spot welding devices are needed to be used for welding the IC card, a plurality of thick and large output cables bring great trouble to the automatic spot welding operation.
In addition, the prior art IC card resistance welding automatic welding equipment has the following defects:
1. the spot welding machine head is not provided with a device for detecting and correcting the pre-pressurizing electrode force, so that the pre-pressurizing electrode force cannot be accurate and consistent;
2. the welding head clamp is only fixed on one front sliding shaft, the parallelism and the stability are poor, and the tip of the welding head can easily slide on a weldment;
3. the spot welding machine head is provided with a movable component consisting of a middle shaft, a sliding shaft clamp and a front sliding shaft in a machine head frame, so that the movable stroke is small and the stability is poor;
in view of the above, there is a need for improvement in an IC card stitch welding work table and a stitch welding head in providing an IC card resistance welding stitch welding apparatus.
Disclosure of Invention
The invention aims to: the defects in the prior art are overcome, and the novel automatic welding equipment for the electric resistance welding of the IC card is provided.
In order to achieve the above object, the present invention provides an automatic welding device for resistance welding of an IC card, which comprises a plurality of resistance welding spot welding devices, an automatic spot welding operation table for the IC card, and an automatic spot welding control device; the multi-resistance welding spot welding device comprises a multi-spot welding machine main machine, a plurality of pulse output transformers, a plurality of spot welding machine heads, a plurality of welding head clamps arranged on the spot welding machine heads, and a plurality of parallel electrode welding heads arranged on the welding head clamps;
the IC card automatic spot welding operation table comprises an operation table bottom plate, two Y-axis sliding tables, an X-axis sliding table, a plurality of pulse output transformers and a plurality of automatic spot welding machine heads, wherein the two Y-axis sliding tables are installed on the operation table bottom plate; the automatic spot welding machine comprises an X-axis sliding table, a plurality of automatic spot welding machine heads, a plurality of pulse output transformers, a plurality of automatic spot welding machine heads and a plurality of automatic spot welding machine heads, wherein the plurality of pulse output transformers are horizontally arranged on an automatic pulley of the X-axis sliding table; the automatic spot welding machine head is formed by assembling a spot welding machine head with a small cylinder, and the automatic pulleys of the two Y-axis sliding tables are respectively provided with an IC card tool clamp work piece table;
the automatic spot welding control device and the spot welding machine hosts are arranged outside the automatic spot welding operation table, each pulse output transformer and each spot welding machine head are respectively and electrically connected with the corresponding spot welding machine host, and the automatic spot welding control device is respectively and electrically connected with the small cylinder, the X-axis sliding table and the driving motors of the two Y-axis sliding tables;
the automatic spot welding machine head is provided with welding head clamps, each welding head clamp is provided with the same first through pin hole at the same position, and the same first through pin penetrates through the first through pin holes of the plurality of welding head clamps;
and the welding head clamp is provided with parallel electrode welding heads, each parallel electrode welding head is provided with the same second through pin hole at the same position, and the same second through pin penetrates through the second through pin holes of the parallel electrode welding heads.
As an improvement of the IC card resistance welding automatic welding equipment, the spot welding machine head comprises a machine head frame provided with a front sliding shaft and a middle shaft, a welding head clamp used for installing a parallel electrode welding head is arranged at the lower end of the front sliding shaft, a compression spring used for pre-pressurizing electrode force is arranged on the middle shaft, an electrode force detection display circuit and a preset electrode force display circuit are arranged on the machine head frame, the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, and the display of detecting and correcting the preset electrode force is realized through an external pressure sensor.
As an improvement of the IC card resistance welding automatic welding equipment, a fine tuning resistor is arranged on the preset electrode force display circuit, and the display of the preset electrode force is corrected through the fine tuning resistor, so that the display of the preset electrode force is the same as the display of the electrode force detected by the external pressure sensor.
As an improvement of the automatic welding equipment for the resistance welding of the IC card, the lower end of the middle shaft is provided with an extension shaft, and the welding head clamps are respectively installed at the lower end of the front sliding shaft in a fastening mode and are installed on the extension shaft of the middle shaft in a sliding mode.
As an improvement of the IC card resistance welding automatic welding equipment, the welding head clamps are respectively arranged at the lower end of the front sliding shaft in a fastening mode and are arranged on the middle shaft extension shaft in a sliding mode through the linear sliding bearing.
As an improvement of the IC card resistance welding automatic welding equipment, the spot welding machine head comprises a groove-shaped rear seat provided with an upper end surface and a lower end surface, the machine head frame is provided with two rear sliding shafts installed through linear sliding bearings, the machine head frame is installed between the upper end surface and the lower end surface of the groove-shaped rear seat through the two rear sliding shafts, and the machine head frame can move up and down relative to the groove-shaped rear seat along the two rear sliding shafts as a movable member.
As an improvement of the IC card resistance welding automatic welding equipment, the lower section of one of the two rear sliding shafts is provided with a return compression spring, and the lower section of the other rear sliding shaft is provided with a stroke limiting metal ring with a set screw.
Advantageous technical effects of the invention
Compared with the prior art, the IC card resistance welding automatic welding equipment has the technical effects that:
1. the invention provides a structure of an IC card automatic spot welding operation table, which comprises: two Y axle slip tables are installed on the operation platform bottom plate, install X axle slip table through the gantry support in two Y axle slip table tops, and install a plurality of pulse output transformers and a plurality of automatic spot welding aircraft noses on X axle slip table, a plurality of pulse output transformers are installed on the automatic coaster of X axle slip table with horizontal mode and a plurality of automatic spot welding aircraft noses are installed in the outside of automatic coaster with the mode of hanging by corresponding pulse output transformer, so set up, the output cable that pulse output transformer and automatic spot welding machine head are connected shortens greatly, and pulse output transformer output cable all moves along with automatic spot welding aircraft nose, effectively increase output current's stability and the precision of automatic spot welding operation.
2. The electrode force detection display circuit is added on the basis that the preset electrode force display circuit is erected on the machine head frame, the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, the display of the preset electrode force can be detected and corrected at any time as long as the external pressure sensor is connected, and the accuracy and consistency of the electrode force displayed by the multiple spot welding machine heads are ensured.
3. An extension shaft is arranged on a middle shaft of the spot welding head, and the welding head clamp is arranged at the lower end of the front sliding shaft in a fastening mode and is arranged on the middle shaft extension shaft in a sliding mode through a linear sliding bearing, so that the stability and the parallelism of the installation of the welding head clamp can be effectively improved.
4. In the prior art, a machine head frame is a fixed support and is used for mounting moving components including a front sliding shaft, a middle shaft and the like, the middle shaft is a moving component, and a pre-pressurizing preset electrode force structure and an electrode force following structure are mounted on the middle shaft, so that electrode force on a parallel electrode welding head is unstable easily, and meanwhile, the moving stroke of the front sliding shaft and the middle shaft is limited by the machine head frame and cannot meet the requirements of some workpieces with long required stroke due to too short stroke. The invention installs two rear sliding shafts on the frame of the spot welder head by a linear sliding bearing, the two rear sliding shafts are installed between the upper and lower end surfaces of the groove-shaped rear seat, the frame of the spot welder head is changed into a moving component, and the middle shaft is fixed and does not participate in the movement. The groove-shaped backseat rear sliding shaft is provided with a limiting metal ring structure, so that the moving stroke of the machine head frame can be increased or changed easily. In addition, the middle shaft is fixed, and the consistency of preset electrode force on the parallel electrode welding head can be ensured.
Drawings
The IC card resistance welding automatic welding equipment is described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a block diagram of an automatic solder resist welding apparatus for IC cards according to the present invention.
FIG. 2 is a schematic structural diagram of an automatic spot welding workbench for an IC card in the automatic resistance welding equipment for an IC card of the present invention.
Fig. 3 is a schematic structural view of a spot welder head and a welding head clamp according to the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, fig. 1 is a block diagram of an automatic solder resist welding apparatus for an IC card, and fig. 2 is a schematic structural diagram of an automatic spot welding workbench for an IC card. The automatic welding equipment for the resistance welding of the IC card comprises a plurality of resistance welding spot welding devices 100, an automatic spot welding workbench 200 of the IC card and an automatic spot welding control device 300; the multiple resistance spot welding apparatus 100 includes multiple spot welding machine hosts 101, multiple pulse output transformers 102, multiple spot welding heads 103, multiple welding head holders 104 respectively mounted on the spot welding heads 103, and multiple parallel electrode welding heads 105 respectively mounted on the welding head holders 104;
the IC card automatic spot welding workbench 200 comprises a workbench bottom plate 201, two Y-axis sliding tables 202 arranged on the workbench bottom plate 201, an X-axis sliding table 204 arranged above the two Y-axis sliding tables 202 through a gantry support 203, a plurality of pulse output transformers 102 arranged on the X-axis sliding table 204 and a plurality of automatic spot welding heads 206; the pulse output transformers 102 are horizontally arranged on an automatic pulley of the X-axis sliding table 204, the automatic spot welding heads 206 are arranged on the outer side of the automatic pulley beside the corresponding pulse output transformers 102 in a suspension mode, and each pulse output transformer 102 is electrically connected with a welding head clamp 104 arranged on the automatic spot welding head 206 through an output cable; the automatic spot welding machine head 206 is formed by assembling a small cylinder 205 on the spot welding machine head 103, and the two Y-axis slide tables 202 are respectively provided with an IC card tool holder work table 207.
It should be noted that the IC card workpiece proposed by the present invention refers to a workpiece composed of up to tens of IC card chips and small coils mounted on a 4-inch cardboard, and the IC card resistance welding automatic welding device of the present invention performs automatic spot welding on the enameled wire lead-out wires of the small coils on the IC card chips. Because the number of welding spots is large, in order to improve the production efficiency, a plurality of resistance welding spot welding devices need to be applied, and two Y-axis sliding tables are arranged on the bottom plate of the workbench.
Fig. 2 shows four resistance spot welding apparatuses, the automatic pulleys of two Y-axis sliding tables 202 are respectively provided with IC card workpieces to be welded through IC card fixture workpiece tables 207, and the programming of the automatic spot welding control apparatus 300 realizes the alternate operation of mounting or dismounting the IC card workpieces on the other Y-axis sliding table 202 when the multiple automatic spot welding heads 206 weld the IC card workpieces on one Y-axis sliding table 202. The automatic spot welding control device 300 and the multiple spot welding machine main units 101 are arranged outside the automatic spot welding operation table 200, each pulse output transformer 102 and each spot welding machine head 103 are electrically connected with the corresponding spot welding machine main unit 101, and the automatic spot welding control device 300 is electrically connected with the small cylinder 205, the X-axis sliding table 204 and the driving motors of the two Y-axis sliding tables 202.
In the embodiment shown in fig. 1, the automatic spot welding control device 300 and the multiple spot welding machine main unit 101 are both chassis structures and are disposed outside the IC card automatic spot welding operation table 200, wherein the automatic spot welding control device 300 is controlled by the drive control of the drive motor of the X-axis sliding table 204 and the Y-axis sliding table 202, the drive control of the small cylinder 205 and the programming control of various software, the automatic spot welding control device 300 is electrically connected with the drive motors of the small cylinder 205, the X-axis sliding table 204 and the Y-axis sliding table 202, and the automatic sliding trolley of the Y-axis sliding table 202 is respectively provided with a tool clamp operation table 207 for installing a workpiece to be welded with an IC card. For example, the X-axis sliding table 204, the Y-axis sliding table 202 and the spot welder head 206 on the IC card automatic spot welding operation table 200 can realize automatic spot welding operation on the IC card workpiece to be welded by programming control of general-purpose PLC software.
Although the present embodiment employs four resistance spot welding apparatuses, it is understood that three or five resistance spot welding apparatuses may be employed depending on the requirements of the IC card workpieces to be welded.
The main circuit for controlling the output pulse transformer, a power transformer, a large capacitor (not shown) and the like are installed in the chassis of the spot welding machine main machine 101, the pulse output transformer 102 and the spot welding head 103 are electrically connected with the spot welding machine main machine 101, when the electrode force applied to the parallel electrode welding head 105 on the welding head clamp 104 reaches a preset value, the spot welding head 103 can send out an electric signal to trigger the spot welding machine main machine 101, pulse output current is provided for the parallel electrode welding head 105, and welding is achieved.
When the resistance welding spot welding device 100 needs to apply an electrode force on the parallel electrode welding head 105 to reach a preset value, the spot welding machine head 103 sends an electric signal to trigger the spot welding machine main machine 101, and pulse output current is provided for the parallel electrode welding head 105 to realize welding. Therefore, the mounting heights of the plurality of automatic spot welding heads 206 on the X-axis slide automatic carriage must be uniform, and the requirement for uniformity of the mounting heights of the plurality of head holders 104 mounted on the automatic spot welding heads 206 and the plurality of parallel electrode welding heads 105 mounted on the head holders 104 is higher.
In order to meet this requirement, in the present embodiment, the same first through-pin hole is provided at the same position of each of the plurality of solder head holders 104, and when the plurality of solder head holders 104 are mounted, the same first through-pin is inserted through the first through-pin holes of the plurality of solder head holders 104, thereby ensuring uniformity in mounting height of the plurality of solder head holders 104. Accordingly, the same second through-pin hole is provided at the same position of each parallel electrode bonding tool 105, and when the parallel electrode bonding tools 105 are mounted, the same second through-pin hole penetrates through the second through-pin holes of the plurality of parallel electrode bonding tools 105, so that the mounting heights of the plurality of parallel electrode bonding tools 105 are ensured to be consistent.
In addition, the improved structure of the spot welding machine head of the automatic spot welding equipment for resistance welding comprises: the machine head frame is provided with an electrode force detection display circuit and a preset electrode force display circuit which are electrically connected with each other, and the display of detecting and correcting the preset electrode force is realized through an external pressure sensor; the welding head clamp is arranged on the lower end of the front sliding shaft in a fastening mode and is also arranged on the middle shaft extension shaft in a sliding mode; the frame of the machine head is changed into three parts of the movable component of the spot welding machine head.
The structure of the spot welding machine head, the preset electrode force display circuit and the electrode force detection display circuit which are electrically connected and mounted on the machine head frame, and the mounting structure of the external pressure sensor are described below with reference to fig. 3.
Referring to fig. 3, the spot welding head of the present invention includes a head frame 304 having a front sliding shaft 305 and a central shaft 306, a welding head clamp 104 disposed at the lower end of the front sliding shaft 305 for mounting a parallel electrode welding head 105, and the central shaft 306 having a compression spring 308A for pre-pressurizing an electrode force and a lower compression spring 308B for increasing the electrode force compliance, wherein the head frame 304 is provided with an electrode force detection display circuit for detecting and correcting a preset electrode force through an external pressure sensor 320 and a preset electrode force display circuit, the electrode force detection display circuit is electrically connected to the preset electrode force display circuit, and the display for detecting and correcting the preset electrode force is realized through the external pressure sensor 320.
In one embodiment of the present invention, a trimming resistor is provided on the preset electrode force display circuit, and the display of the preset electrode force is corrected by the trimming resistor to be the same as the display of the electrode force detected by the external pressure sensor.
As shown in fig. 3, a preset electrode force display circuit is provided on the front outer groove 316 of the handpiece frame 304, an upper compression spring 308A for pre-pressurizing the electrode force and a lower compression spring 308B for increasing the electrode force followability are mounted on the center shaft 306, a slide shaft clamp 309 is mounted between the upper compression spring 308A and the lower compression spring 308B, and the slide shaft clamp 309 is clamped on the front slide shaft 305. So configured, the pre-set electrode force of the upper compression spring 308A can be applied to the front slide shaft 305 via the slide shaft clamp 309.
It should be noted that the structure of the front sliding shaft 305, the sliding shaft clamp 309 and the upper and lower compression springs 308A,308B mounted on the central shaft 306 can be referred to as an "electrode force following structure", which can ensure that the provided electrode force is very soft, and through detection, the electrode force provided by the structure is at least 0.1N, and can increase or decrease the preset electrode force with the accuracy of 0.1N.
In order to detect and correct the electrode force preset by the compression spring, the illustrated embodiment is provided with a preset electrode force display circuit and an electrode force detection display circuit for detecting the preset electrode force through an external pressure sensor, wherein the preset electrode force display circuit is electrically connected with the electrode force detection display circuit. As shown in fig. 3, the front outer side of the head frame 304 of the spot welding head 103 is provided with a groove 316 for mounting a preset electrode force display circuit and an electrode force detection display circuit, which are electrically connected. When the preset electrode force needs to be detected and corrected, the electrode force of the preset electrode force at the moment of triggering the welding current can be detected only by externally connecting the pressure sensor 320 and electrically connecting the electrode force detection display circuit through the electric signal outgoing line 324 of the pressure sensor.
Referring to fig. 3, in the illustrated embodiment, the external pressure sensor has a measuring range of 5KG and a size of about 30x 15x 15mm (length x width x height), the pressure sensor 320 has a fixed end 321 and a force measuring end 322, a dumbbell-shaped deformation frame 323 is disposed in the middle of the pressure sensor 320, a pressure sensing plate is mounted on the deformation frame 323, and an electrical signal generated when the deformation frame 323 deforms can be led out through an electrical signal outgoing line 324.
In the illustrated embodiment, the fixed end 321 circumscribing the pressure sensor 320 is mounted on the housing of the pressure sensor, and the load end 322 of the pressure sensor 320 is suspended. When the preset electrode force needs to be detected and corrected, only the electric signal leading-out wire 324 of the external pressure sensor is electrically connected with the electrode force detection display circuit through the electric socket, the parallel electrode welding head 105 is installed on the welding head clamp 104 or the electrode force pressurizing rod like the welding head is installed on the welding head clamp 104, the parallel electrode welding head 105 or the electrode force pressurizing rod is used for pressurizing the force measuring end 322 of the pressure sensor 320, and when the pressurized force reaches the moment of the preset electrode force, the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, so the electrode force detection display circuit can read the electrode force of the electrode force at the moment of switching on the power supply.
The preset electrode force display circuit, the electrode force detection display circuit, the preset electrode force display circuit and the electrode force detection display circuit are electrically connected, and the structure and the working principle of the external pressure sensor are further explained below.
Firstly, presetting the structure of an electrode force display circuit to connect the compressed stroke of a compression spring with the stroke of a sliding resistor; the resistance value of the sliding resistor is changed at the same time when the compression stroke of the spring is changed, and the change of the resistance value realizes that the size of the electrode force of the compression amount of the spring is displayed by a digital display tube through an A/D conversion circuit. Because the change of the spring compression amount and the compression force is not linear, but the change of the stroke of the sliding resistor and the change of the resistance value are linear, the force displayed by the preset electrode force display circuit inevitably has inevitable errors, and the resistance welding spot welding head in the prior art has no structure for detecting and correcting the display of the preset electrode force.
Next, it should be noted that the principle of the electrode force detection display circuit of this embodiment is basically the same as that of the detection display circuit of the commercially available electronic scale of the pressure sensor, as shown in fig. 3, when the pressure sensor 320 is stressed, the deformation frame 323 generates deformation to generate a potential difference, the change of the potential difference is detected by the pressure sensing sheet tightly attached to the deformation frame 323 and is led out by the lead 324, and the accurate electrode force displayed in digital form can be obtained by a/D conversion on the circuit.
The electrode force displayed by the preset electrode force display circuit is substantially an indication for triggering the welding power supply, when the electrode force applied to the weldment by the welding head reaches the preset electrode force display value, the preset electrode force display circuit sends an electric signal to trigger the welding power supply, in the embodiment, the welding head or the electrode force pressurizing rod replaces the welding head to pressurize the force measuring end 322 of the external pressure sensor 320 on the welding head clamp 104, so that the size of the electrode force can be detected, and the size of the electrode force is completely the same as the electrode force applied to the weldment by the welding head for welding. Because the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, the electrode force applied to the weldment for welding can be taken as the peak value of the electrode force detection display circuit, and when the force of the force measuring end 322 of the external pressure sensor 320 reaches the peak value, the electric signal of the welding power supply is triggered and simultaneously transmitted to the pressure sensor detection display circuit, and the digital display is converted. In other words, the electrode force detection display circuit of the present embodiment detects only the electrode force (i.e., the peak value) applied to the weldment for welding by the external pressure sensor, and corrects the display of the preset electrode force accordingly.
This embodiment is provided with the digital display screen of presetting electrode strength display circuit and the digital display screen of electrode strength detection display circuit simultaneously on aircraft nose frame 304, the electrode strength that shows presetting electrode strength display circuit and demonstration electrode strength detection display circuit external pressure sensor actual measurement when showing respectively, be provided with trimming resistor simultaneously on presetting electrode strength display circuit, through trimming resistor the demonstration correction of presetting electrode strength, make it show the same with the electrode strength that external pressure sensor detected.
It should be noted that after the work of detecting and correcting the preset electrode force is completed, the external pressure sensor 320 needs to be removed, and the electric signal lead-out wire 324 on the electric socket is removed, so that the micro resistance welding spot welding work can be performed.
Referring to fig. 3, a middle shaft extension shaft 315 is disposed at the lower end of the middle shaft 306, and the welding head clamp 104 is mounted on the front sliding shaft 305 of the head frame 304 at the lower end thereof and is mounted on the middle shaft extension shaft 315 in a sliding manner. According to a preferred embodiment of the present invention, the weld head holder 104 is mounted in a tight manner on the lower end of the front slide shaft 305 of the head frame 304 and in a sliding manner on the middle shaft extension shaft 315 via linear slide bearings, respectively. The spot welding machine head of the invention is provided with a middle shaft extension shaft 315 arranged at the lower end of a middle shaft 306, and the welding head clamp is arranged at the lower end of a front sliding shaft 305 in a fastening mode and is also arranged on the middle shaft extension shaft 315 in a sliding mode through a linear sliding bearing, so that the mounting stability and parallelism of the welding head clamp 104 can be well increased, and the slippage of the tip of a welding head on a weldment during welding can be effectively eliminated.
In the following, referring to fig. 3, the present embodiment is described, in which the frame of the head is provided with two rear sliding shafts 307A,307B mounted via linear sliding bearings, and the frame of the head is mounted between the upper and lower end surfaces of the groove-shaped rear seat 303 via the two rear sliding shafts 307A,307B, so that the frame of the head moves up and down along the two rear sliding shafts 307A,307B relative to the groove-shaped rear seat 303 as a movable member, thereby changing the frame of the head 304 into a movable member of the resistance welding spot welding head.
The head frame of the spot welding head in the prior art is a fixed support, the head frame is used for installing moving components including a front sliding shaft, a middle shaft and the like, the middle shaft is a moving component, and a pre-pressurizing preset electrode force structure and an electrode force following structure are arranged on the middle shaft, so that the provided electrode force is easy to be unstable, and meanwhile, the moving strokes of the front sliding shaft and the middle shaft are limited by the head frame and generally exceed 20 mm. Because the welding head clamp is arranged at the lower end of the front sliding shaft and the parallel electrode welding head is arranged on the welding head clamp, the moving stroke of the parallel electrode welding head is limited by the frame of the welding head, and the moving stroke of the parallel electrode welding head is too short to meet the requirements of some workpieces with long stroke.
In the embodiment, two rear sliding shafts 307A and 307B are arranged on the machine head frame 304 by a linear sliding bearing, and the two rear sliding shafts 307A and 307B are arranged between the upper end surface and the lower end surface of the groove-shaped rear seat 303, so that the machine head frame 304 is changed into a moving component, and the middle shaft 306 is fixed and does not participate in movement. The movable stroke of the handpiece frame 304 can be easily increased or changed due to the structure that the rear sliding shafts 307A,307B of the groove-shaped rear seat 303 are provided with the limiting metal rings 314. In addition, the central axis 306 is fixed to ensure consistency of the preset electrode force on the parallel electrode weld head.
In order to increase the moving stroke of the parallel electrode welding head 105, the embodiment proposes that the machine head frame 304 is arranged on the groove-shaped rear seat 303, the middle shaft 306 is fixed in the machine head frame 304, the machine head frame 304 is changed into a movable component of the spot welding machine head 103, and the moving stroke and the installation stability of the spot welding machine head 103 are increased.
Referring to fig. 3, the spot welding head 103 of the present embodiment includes a groove-shaped rear seat 303 having upper and lower end surfaces 311A,311B, the head frame 304 is provided with two rear sliding shafts 307A,307B installed through linear sliding bearings, the head frame 304 is installed between the upper and lower end surfaces 311A,311B of the groove-shaped rear seat 303 through the two rear sliding shafts 307A,307B, and the head frame 304 can move up and down relative to the groove-shaped rear seat 303 along the two rear sliding shafts 311A, 311B. So configured, the head frame 304 becomes a moving member of the spot welder head 103. Meanwhile, in the present embodiment, the middle shaft 306 is fixed on the handpiece frame 304 by the fastening screw, the middle shaft 306 is no longer a moving component, and the front sliding shaft 305 of the sliding shaft clamp 309 can still make a small range of displacement between the upper and lower compression springs 308A, 308B. So configured, the head frame 304 is movable up and down relative to the slotted backseat 303 along two rear slide shafts 307A, 307B. When welding operation is carried out, as long as a welding acting force and a resetting force are added, the machine head frame 304 is used as a movable component of the spot welding machine head 103, the welding head clamp 104 can be driven to carry out resistance welding spot welding operation of reciprocating movement within the range of the groove-shaped rear seat 303, and the central shaft 306 is fixed, so that the consistency of electrode force can be ensured.
Referring to fig. 3, a pedal cable 312 for providing a welding force to the head frame 304 through a pedal is installed between the two rear sliding shafts 307A,307B, a lower end of the head frame 304 is connected to the cable 312, the two rear sliding shafts 307A,307B are installed on a lower end surface of the groove-shaped rear seat 303, a return compression spring 313 is installed on one rear sliding shaft 307B near the outer side, a stroke limiting metal ring 314 with an adjustable screw is installed on one rear sliding shaft 307A near the inner side, and the installation position of the limiting metal ring 314 on the rear sliding shaft 307A is adjusted through the adjustable screw, so that the moving stroke of the head frame 304 on the groove-shaped rear seat 303 can be increased or decreased.
The machine head frame 304 is used as a moving component of the spot welding machine head 103, so that the mounting stability of the spot welding machine head 103 can be increased, the consistency of the provided electrode force is ensured, and the adjustment of the movable stroke of the parallel electrode welding head through the machine head frame 304 is facilitated. Tests show that the moving stroke of the parallel electrode welding head can be increased to more than 50mm by the welding head clamp 104 driven by the machine head frame 304.
In combination with the above detailed description of the embodiments of the present invention, it can be seen that, compared with the prior art, the IC card resistance welding automatic welding device of the present invention has the technical effects of:
1. the invention lists pulse output transformers from a spot welding machine host, and provides a structure of an IC card automatic spot welding operation table, which comprises: two Y-axis sliding tables are installed on the bottom plate of the operation table, an X-axis sliding table is installed above the two Y-axis sliding tables through a gantry support, and a plurality of pulse output transformers and a plurality of automatic spot welding heads are installed on the X-axis sliding table. According to the automatic spot welding machine head, the pulse output transformers are horizontally arranged on the automatic pulley of the X-axis sliding table, the automatic spot welding machine heads are arranged on the outer side of the automatic pulley beside the corresponding pulse output transformers in a hanging mode, so that output cables connected with the pulse output transformers and the automatic spot welding machine heads are greatly shortened, the output cables of the pulse output transformers move along with the automatic spot welding machine heads, and the stability of output current and the accuracy of automatic spot welding operation are effectively improved.
2. The electrode force detection display circuit is added on the basis that the preset electrode force display circuit is erected on the machine head frame, the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, the display of the preset electrode force can be detected and corrected at any time as long as the external pressure sensor is connected, and the accuracy and consistency of the electrode force displayed by the multiple spot welding machine heads are ensured.
3. An extension shaft is arranged on a middle shaft of the spot welding head, and the welding head clamp is arranged at the lower end of the front sliding shaft in a fastening mode and is arranged on the middle shaft extension shaft in a sliding mode through a linear sliding bearing, so that the stability and the parallelism of the installation of the welding head clamp can be effectively improved.
4. The invention installs two rear sliding shafts on the frame of the spot welder head by a linear sliding bearing, the two rear sliding shafts are installed between the upper and lower end surfaces of the groove-shaped rear seat, the frame of the spot welder head is changed into a moving component, and the middle shaft is fixed and does not participate in the movement. The groove-shaped backseat rear sliding shaft is provided with a limiting metal ring structure, so that the moving stroke of the machine head frame can be increased or changed easily. In addition, the center shaft is fixed, so that the consistency of the preset electrode force on the parallel electrode welding head can be ensured.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (7)
1. An automatic welding device for IC card resistance welding comprises a plurality of resistance welding spot welding devices, an automatic IC card spot welding operation table and an automatic spot welding control device; the multi-resistance welding spot welding device comprises a multi-spot welding machine main machine, a plurality of pulse output transformers, a plurality of spot welding machine heads, a plurality of welding head clamps arranged on the spot welding machine heads, and a plurality of parallel electrode welding heads arranged on the welding head clamps; it is characterized in that the preparation method is characterized in that,
the IC card automatic spot welding operation table comprises an operation table bottom plate, two Y-axis sliding tables, an X-axis sliding table, a plurality of pulse output transformers and a plurality of automatic spot welding machine heads, wherein the two Y-axis sliding tables are installed on the operation table bottom plate; the automatic spot welding machine comprises an X-axis sliding table, a plurality of automatic spot welding machine heads, a plurality of pulse output transformers, a plurality of automatic spot welding machine heads and a plurality of automatic spot welding machine heads, wherein the plurality of pulse output transformers are horizontally arranged on an automatic pulley of the X-axis sliding table; the automatic spot welding machine head is formed by assembling a spot welding machine head with a small cylinder, and the automatic pulleys of the two Y-axis sliding tables are respectively provided with an IC card tool clamp work piece table;
the automatic spot welding control device and the spot welding machine hosts are arranged outside the automatic spot welding operation table, each pulse output transformer and each spot welding machine head are respectively and electrically connected with the corresponding spot welding machine host, and the automatic spot welding control device is respectively and electrically connected with the small cylinder, the X-axis sliding table and the driving motors of the two Y-axis sliding tables;
the automatic spot welding machine head is provided with welding head clamps, each welding head clamp is provided with the same first through pin hole at the same position, and the same first through pin penetrates through the first through pin holes of the plurality of welding head clamps;
and the welding head clamp is provided with parallel electrode welding heads, each parallel electrode welding head is provided with the same second through pin hole at the same position, and the same second through pin penetrates through the second through pin holes of the parallel electrode welding heads.
2. The automatic welding equipment for resistance welding of IC card according to claim 1, wherein the spot welding head comprises a head frame having a front slide shaft and a central shaft, a welding head clamp for mounting a parallel electrode welding head is provided at the lower end of the front slide shaft, the central shaft is provided with a compression spring for pre-pressurizing the electrode force, the head frame is provided with an electrode force detection display circuit and a preset electrode force display circuit, the electrode force detection display circuit is electrically connected with the preset electrode force display circuit, and the display of detection and correction of the preset electrode force is realized by an external pressure sensor.
3. The automatic solder resist welding equipment for IC cards according to claim 2, characterized in that the preset electrode force display circuit is provided with a trimming resistor, and the display of the preset electrode force is corrected by the trimming resistor to be the same as the display of the electrode force detected by the external pressure sensor.
4. The automatic solder resist welding equipment for the IC card according to claim 2, wherein the lower end of the middle shaft is provided with an extension shaft, and the solder head clamps are respectively and tightly mounted at the lower end of the front slide shaft and slidably mounted on the extension shaft of the middle shaft.
5. The IC card resistance welding automatic welding device according to claim 2, wherein the solder head clips are respectively mounted on the lower end of the front slide shaft in a fastening manner and on the extension shaft of the middle shaft in a sliding manner through linear slide bearings.
6. The automatic solder resist welding apparatus for IC cards according to claim 2, wherein the spot welding head includes a groove-shaped backseat provided with upper and lower end faces, and the head frame is provided with two rear slide shafts mounted via linear slide bearings, and the head frame is mounted between the upper and lower end faces of the groove-shaped backseat via the two rear slide shafts, so that the head frame as a movable member can move up and down along the two rear slide shafts with respect to the groove-shaped backseat.
7. The automatic solder resist welding equipment for the IC card according to claim 6, wherein the lower section of one of the two rear slide shafts is provided with a return compression spring, and the lower section of the other rear slide shaft is provided with a stroke limiting metal ring with a set screw.
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| CN201910757053.0A CN110587093B (en) | 2019-08-16 | 2019-08-16 | Automatic welding equipment for resistance welding of IC card |
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| CN102303189A (en) * | 2011-08-15 | 2012-01-04 | 佛山市顺德区德芯智能科技有限公司 | IC card welding device for dual-interface welding packaging machine and control method of IC card welding device |
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