Automatic spot welding machine and wire harness welding method

Abstract

The invention belongs to the technical field of mechanical automation, and particularly relates to an automatic spot welding machine and a wiring harness welding method.The jacking driving assembly is used for driving a jacking block to ascend so that a first clamping block and a second clamping block can clamp a circuit board from the two sides and abut against the circuit board; the first moving driving piece drives the sliding block to move, the sliding block drives the first pressing claw to rotate through a first roller inserted into the first sliding groove set so as to press the first section of the coaxial line, and then the sliding block further rotates through a second roller inserted into the second sliding groove set so as to press the second section of the coaxial line. And the welding mechanism is used for welding the coaxial line on the circuit board. According to the invention, during welding, the first pressing claw and the second pressing claw can successively press the coaxial line, so that the stability and tightness of the coaxial line pressed on the circuit board are ensured, and the welding firmness and welding quality of the coaxial line welded on the circuit board are further ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical automation, and in particular relates to an automatic spot welding machine and a wire harness welding method. Background Art

[0002] After the outer skin of one end of the coaxial cable is peeled off, it needs to be soldered to the circuit board. At present, most of the back-end circuit board welding stations are still in the manual soldering stage. Manual soldering often results in problems such as unreliable solder joints, uneven solder joint sizes, low efficiency and low quality.

[0003] With the continuous advancement of mechanical automation technology, many manufacturers have also developed automatic welding machines, which can automatically identify the welding position between the coaxial line and the circuit board, and then drive the welding head to automatically weld the welding position between the coaxial line and the circuit board. The automatic welding machine in the prior art usually directly welds the coaxial line on the circuit board. Due to the loose contact between the coaxial line and the circuit board, the welding point after welding is not reliable and the welding quality is poor. Summary of the invention

[0004] Aiming at the technical problems that after the automatic welding machine in the prior art welds the coaxial line on the circuit board, the welding spot is not reliable and the welding quality is poor, the present invention provides an automatic spot welding machine and a wire harness welding method.

[0005] In view of the above technical problems, the first embodiment of the present invention provides an automatic spot welding machine for welding a coaxial line on a circuit board, comprising a clamping mechanism, a welding mechanism, a positioning mechanism and a carrier; the coaxial line and the circuit board are both mounted on the carrier; The clamping mechanism comprises a first movable driving member, a slider, a bearing assembly, a first roller, a second roller, and a first pressing claw and a second pressing claw both mounted on the bearing assembly, the slider being provided with a first sliding groove group and a second sliding groove group that are parallel and spaced apart; the first movable driving member is mounted on the bearing assembly and connected to the slider, and the first pressing claw and the second pressing claw are both rotatably connected to the bearing assembly; The first roller is slidably mounted on the first slide groove group and is rotatably connected to the first pressing claw, and the second roller is slidably mounted on the second slide groove group and is rotatably connected to the second pressing claw; The first moving driving member drives the slider to move, and after the slider drives the first pressing claw to rotate to press the first section of the coaxial line by the first roller inserted into the first slide groove group, the slider also rotates by the second roller inserted into the second slide groove group to press the second section of the coaxial line; wherein the distance between the first section and the circuit board is greater than the distance between the second section and the circuit board; The positioning mechanism comprises a top block installed on the top block by a top drive assembly; the top block is provided with a first clamping block and a second clamping block distributed at intervals; the top drive assembly is used to drive the top block to rise, so that the first clamping block and the second clamping block clamp and support the circuit board from both sides; The welding mechanism is used for welding the coaxial line onto the circuit board.

[0006] Optionally, a positioning hole is provided on the carrier, and the positioning mechanism further includes a positioning pin installed on the top block, and the lifting drive assembly is used to drive the top block to rise, and also enables the positioning pin to be inserted into the positioning hole.

[0007] Optionally, the positioning mechanism further includes a third roller and a support seat provided with a second guide through hole; an end of the top block away from the positioning pin passes through the second guide through hole and then connects to the third roller; The lifting drive assembly comprises a second moving drive member and a bottom plate provided with an inclined surface, and the third roller abuts against the inclined surface; The second moving driving member is used to drive the bottom plate to move, and the bottom plate drives the top block to move up and down through the third roller abutting against the inclined surface.

[0008] Optionally, a first through hole is provided on the jacking block, and the jacking drive assembly further comprises a limiting claw installed on the bottom plate, the limiting claw extends into the through hole and abuts against the third roller.

[0009] Optionally, the automatic spot welding machine further comprises a support frame mounted on the support seat, the bearing assembly is mounted on the support frame, and the clamping mechanism is located above the positioning mechanism.

[0010] Optionally, the bearing assembly includes a carrier block, a guide plate, and a first rotating shaft and a second rotating shaft both fixedly mounted on the guide plate; the first moving driving member and the guide plate are both mounted on the carrier block; the first rotating shaft is rotatably connected to the first pressing claw, and the second rotating shaft is rotatably connected to the second pressing claw; The slider drives the first pressing claw to rotate around the first rotating shaft to press the first section of the coaxial line by inserting the first roller of the first sliding groove group; The slider also drives the second pressing claw to rotate around the second rotating shaft to press the second section of the coaxial line through the second roller inserted into the first sliding groove group.

[0011] Optionally, the first slide groove group includes a first flat groove, a first inclined groove and a second flat groove connected in sequence, and the second slide groove group includes a third flat groove, a second inclined groove and a fourth flat groove connected in sequence; the first flat groove, the second flat groove, the third flat groove and the fourth flat groove are parallel to each other; the first inclined groove and the second inclined groove are parallel; the distance between the second flat groove and the bottom of the bearing component is equal to the distance between the fourth flat groove and the bottom of the bearing component.

[0012] Optionally, the first pressing jaw is provided with a first pressing groove adapted to the coaxial line, and the first pressing jaw presses the first section of the coaxial line through the first pressing groove; The second pressing jaw is provided with a second pressing groove matched with the coaxial line, and the second pressing jaw presses the second section of the coaxial line through the second pressing groove.

[0013] Optionally, the welding mechanism includes a mobile module and a visual camera and a spot welding head both mounted on the mobile module; The automatic spot welding machine also includes a base and a cleaner for cleaning the spot welding head, and the mobile driving module and the cleaner are both installed on the base.

[0014] Another embodiment of the present invention further provides a wire harness welding method, which is applied to the above-mentioned automatic spot welding machine, comprising: The lifting drive assembly is used to drive the lifting block to rise, so that the first clamping block and the second clamping block clamp and support the circuit board from both sides; The first moving driving member drives the slider to move, and after the slider drives the first pressing claw to rotate to press the first section of the coaxial line through the first roller inserted into the first sliding groove group, the slider also rotates through the second roller inserted into the second sliding groove group to press the second section of the coaxial line; The welding mechanism welds the coaxial harness onto the circuit board.

[0015] In the present invention, the coaxial line and the circuit board are located on the carrier and move together to the top of the positioning mechanism, the positioning mechanism drives the top block to move upward, the first clamping block and the second clamping block can clamp the circuit board from both sides, and the circuit board is supported on the first clamping block and the second clamping block; in the process of the first movable driving member driving the slider to move, the first roller moves in the first slide groove group, so that the first pressing claw rotates and presses the first section of the coaxial line, and the second roller moves in the second slide groove group and presses the second section of the coaxial line, so that the coaxial line is pressed on the carrier by the first pressing claw and the second pressing claw; the welding mechanism welds the coaxial line to the circuit board. In the present invention, since the distance between the second section of the coaxial line and the circuit board is smaller than the distance between the first section of the coaxial line and the circuit board, when the first pressing claw presses the first section of the coaxial line, the end of the coaxial line may be tilted, and the second pressing claw presses the second section of the coaxial line afterwards, thereby avoiding the accident of the end of the coaxial line tilting during one-time pressing. The design that the first pressing claw and the second pressing claw can press the first section and the second section of the coaxial line successively ensures the smoothness and stability of the end of the coaxial line pressed on the circuit board, and improves the welding quality between the coaxial line and the circuit board. In addition, the first clamping block and the second clamping block can clamp the circuit board from opposite sides, avoiding the process of the clamping assembly pressing the coaxial line, and avoiding the phenomenon of displacement between the circuit board and the coaxial line, further ensuring the welding quality between the coaxial line and the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 A schematic structural diagram of an automatic spot welding machine provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a welding mechanism of an automatic spot welding machine provided in one embodiment of the present invention; Figure 3 A partial structural schematic diagram of an automatic spot welding machine provided by an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a clamping mechanism of an automatic spot welding machine provided by an embodiment of the present invention when it is in a clamping state; Figure 5 A schematic diagram of the structure of an automatic spot welding machine provided by an embodiment of the present invention when the clamping mechanism is in an open state; Figure 6 A schematic diagram of the structure of a positioning mechanism and a carrier of an automatic spot welding machine provided in one embodiment of the present invention; Figure 7 A schematic structural diagram of a positioning mechanism of an automatic spot welding machine provided in one embodiment of the present invention; Figure 8A schematic diagram of a wire harness welding method provided in one embodiment of the present invention.

[0018] The reference numerals in the specification are as follows: 1. Clamping mechanism; 11. First mobile driving member; 12. Slider; 121. First slide group; 122. Second slide group; 13. Carrying assembly; 131. Carrying block; 132. Guide plate; 133. First rotating shaft; 134. Second rotating shaft; 14. First roller; 15. Second roller; 16. First pressing claw; 17. Second pressing claw; 2. Mobile module; 3. Visual camera; 4. Spot welding head; 5. Positioning mechanism; 51. Lifting driving assembly; 511. Second mobile driving member; 512. Bottom plate; 513. Limiting claw; 52. Lifting block; 53. Positioning pin; 54. First clamping block; 55. Second clamping block; 56. Third roller; 57. Support seat; 6. Carrier; 7. Support frame; 8. Base; 9. Cleaner; 101. Coaxial line; 102. Circuit board. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] It should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation of the present invention. Moreover, the workpieces applicable to the automatic spot welding machine in the present invention are not limited to coaxial lines, etc.

[0021] like Figure 1 As shown, the first embodiment of the present invention provides an automatic spot welding machine for welding a coaxial line 101 on a circuit board 102, comprising a clamping mechanism 1, a welding mechanism, a positioning mechanism 5 and a carrier 6; the coaxial line 101 and the circuit board 102 are both mounted on the carrier 6; it can be understood that the end of the coaxial line 101 (with the outer skin peeled off) is overlapped on the welding part of the circuit board 102.

[0022] like Figure 4 and Figure 5As shown, the clamping mechanism 1 includes a first movable driving member 11, a slider 12, a bearing assembly 13, a first roller 14, a second roller 15, and a first pressing claw 16 and a second pressing claw 17 both installed on the bearing assembly 13, and the slider 12 is provided with a first slide groove group 121 and a second slide groove group 122 that are parallel and spaced apart; the first movable driving member 11 is installed on the bearing assembly 13 and connected to the slider 12, and the first pressing claw 16 and the second pressing claw 17 are both rotatably connected to the bearing assembly 13; it can be understood that the first movable driving member 11 includes but is not limited to a linear motor, a pneumatic cylinder, a hydraulic cylinder, and a screw nut mechanism.

[0023] The first roller 14 is slidably mounted on the first slide groove group 121 and is rotatably connected to the first pressing claw 16 , and the second roller 15 is slidably mounted on the second slide groove group 122 and is rotatably connected to the second pressing claw 17 ; it can be understood that the second pressing claw 17 is located above the first pressing claw 16 .

[0024] The first movable driving member 11 drives the slider 12 to move, and the slider 12 drives the first pressing claw 16 to rotate to press the first section of the coaxial line 101 by inserting the first roller 14 of the first slide groove group 121, and then the slider 12 rotates to press the second section of the coaxial line 101 by inserting the second roller 15 of the second slide groove group 122; wherein the distance between the first section and the circuit board 102 is greater than the distance between the second section and the circuit board 102.

[0025] like Figure 6 and Figure 7 As shown, the positioning mechanism 5 includes a lifting drive component 51 and a top block 52 installed on the lifting drive component 51; the top block 52 is provided with a first clamping block 54 and a second clamping block 55 distributed at intervals; the lifting drive component 51 is used to drive the top block 52 to rise, so that the first clamping block 54 and the second clamping block 55 clamp and support the circuit board 102 from both sides; it can be understood that the lifting drive component 51 includes but is not limited to a pneumatic cylinder, a hydraulic cylinder, a screw nut assembly, etc.; and the positioning mechanism 5 is located below the carrier 6.

[0026] The welding mechanism is used to weld the coaxial line 101 onto the circuit board 102 .

[0027] Specifically, the coaxial line 101 and the circuit board 102 are located on the carrier 6 and move together to the top of the positioning mechanism 5. The positioning mechanism 5 drives the top block 52 to move upward. The first clamping block 54 and the second clamping block 55 can clamp the circuit board 102 from both sides, and the circuit board 102 is supported on the first clamping block 54 and the second clamping block 55. In the process of the first movable driving member 11 driving the slider 12 to move, the first roller 14 moves in the first slide groove group 121, so that the first pressing claw 16 rotates and presses the first section of the coaxial line 101, and the second roller 15 moves in the second slide groove group 122 and presses the second section of the coaxial line 101, so that the coaxial line 101 is pressed on the carrier 6 by the first pressing claw 16 and the second pressing claw 17. The welding mechanism welds the coaxial line 101 to the circuit board 102. In the present invention, since the distance between the second section of the coaxial line 101 and the circuit board 102 is smaller than the distance between the first section of the coaxial line 101 and the circuit board 102, when the first pressing claw 16 presses the first section of the coaxial line 101, the end of the coaxial line 101 may be tilted, and the second pressing claw 17 presses the second section of the coaxial line 101 afterwards, thereby avoiding the accident of the end of the coaxial line 101 tilting when pressing once, and the design that the first pressing claw 16 and the second pressing claw 17 can press the first section and the second section of the coaxial line 101 successively ensures the smoothness and stability of the end of the coaxial line 101 pressed on the circuit board 102, and improves the welding quality between the coaxial line 101 and the circuit board 102. In addition, the first clamping block 54 and the second clamping block 55 can clamp the circuit board 102 from opposite sides, avoiding the process of the clamping assembly pressing the coaxial line 101, and the phenomenon of displacement between the circuit board 102 and the coaxial line 101, further ensuring the welding quality between the coaxial line 101 and the circuit board 102.

[0028] In one embodiment, if Figure 6 and Figure 7 As shown, the carrier 6 is provided with a positioning hole, and the positioning mechanism 5 also includes a positioning pin 53 installed on the top block 52. The jacking drive assembly 51 is used to drive the top block 52 to rise, and the positioning pin 53 is inserted into the positioning hole. It can be understood that the jacking drive assembly 51 drives the top block 52 to move upward, and the positioning pin 53 is inserted into the positioning hole to achieve the function of positioning the carrier 6. At the same time, the first clamping block 54 and the second clamping block 55 can clamp the circuit board 102 from both sides. In this embodiment, the positioning pin 53 is inserted into the positioning hole to ensure the stability of the docking between the top block 52 and the carrier 6, thereby ensuring that the first clamping block 54 and the second clamping block 55 can stably clamp the circuit board 102.

[0029] In one embodiment, if Figure 6 and Figure 7 As shown, the positioning mechanism 5 also includes a third roller 56 and a support seat 57 provided with a second guide through hole; the end of the top block 52 away from the positioning pin 53 passes through the second guide through hole and is connected to the third roller 56; it can be understood that the third roller 56 is installed at the bottom of the top block 52, and the positioning pin 53, the first clamping block 54 and the second clamping block 55 are all installed on the top of the top block 52.

[0030] The lifting drive assembly 51 includes a second movable drive member 511 and a bottom plate 512 with an inclined surface, and the third roller 56 abuts against the inclined surface; it can be understood that the second movable drive member 511 includes but is not limited to a linear motor, a pneumatic cylinder, and a hydraulic cylinder.

[0031] The second mobile driving member 511 is used to drive the bottom plate 512 to move, and the bottom plate 512 drives the top block 52 to rise and fall through the third roller 56 abutting against the inclined surface. Specifically, the second mobile driving member 511 drives the bottom plate 512 to move, and the bottom plate 512 drives the top block 52 to rise and fall through the inclined surface thereon, and in the process of the bottom plate 512 driving the top block 52 to rise and fall through the inclined surface, the third roller 56 rolls on the inclined surface. In this embodiment, the second mobile driving member 511 has a large lifting force on the top block 52, and the positioning mechanism 5 has a compact structure and occupies a small space.

[0032] In one embodiment, if Figure 6 and Figure 7 As shown, the top block 52 is provided with a first through hole, and the jacking drive assembly 51 further includes a limiting claw 513 installed on the bottom plate 512, and the limiting claw 513 extends into the through hole and abuts against the third roller 56. It can be understood that the limiting claw 513 is low connected to the top of the third roller 56, and the inclined surface is low connected to the bottom of the third roller 56. In this embodiment, the design of the limiting claw 513 ensures the stability of the bottom plate 512 driving the roller to roll through the inclined surface.

[0033] In one embodiment, if Figure 3 As shown, the automatic spot welding machine further includes a support frame 7 mounted on the support seat 57, the bearing assembly 13 is mounted on the support frame 7, and the clamping mechanism 1 is located above the positioning mechanism 5. It can be understood that the support frame 7 can play a role in supporting the positioning mechanism 5.

[0034] In one embodiment, if Figure 4 and Figure 5As shown, the supporting assembly 13 includes a carrier block 131, a guide plate 132, and a first rotating shaft 133 and a second rotating shaft 134 both fixedly mounted on the guide plate 132; the first movable driving member 11 and the guide plate 132 are both mounted on the carrier block 131; the first rotating shaft 133 is rotatably connected to the first pressing claw 16, and the second rotating shaft 134 is rotatably connected to the second pressing claw 17; it can be understood that the second rotating shaft 134 is located above and in front of the first rotating shaft 133.

[0035] The slider 12 drives the first pressing claw 16 to rotate around the first rotating shaft 133 to press the first section of the coaxial line 101 by inserting the first roller 14 of the first sliding groove group 121; it can be understood that during the relative sliding of the first roller 14 in the first sliding groove group 121 (the slider 12 moves and the first roller 14 does not move), the first pressing claw 16 rotates around the first rotating shaft 133 so that the first pressing claw 16 presses the first section of the coaxial line 101.

[0036] The slider 12 also drives the second pressing claw 17 to rotate around the second rotating shaft 134 to press the second section of the coaxial line 101 through the second roller 15 inserted into the first slide groove group 121. It can be understood that during the relative sliding of the second roller 15 in the second slide groove group 122 (the slider 12 moves, and the second roller 15 does not move), the second pressing claw 17 rotates around the second rotating shaft 134, so that the second pressing claw 17 presses the second section of the coaxial line 101. In this embodiment, the pressing mechanism 1 has a compact structure and occupies a small space.

[0037] In one embodiment, if Figure 5 As shown, the first slide groove group 121 includes a first flat groove, a first inclined groove and a second flat groove connected in sequence, and the second slide groove group 122 includes a third flat groove, a second inclined groove and a fourth flat groove connected in sequence; the first flat groove, the second flat groove, the third flat groove and the fourth flat groove are parallel to each other; the first inclined groove and the second inclined groove are parallel; the distance between the second flat groove and the bottom of the bearing component 13 is equal to the distance between the fourth flat groove and the bottom of the bearing component 13.

[0038] During the process of the wire pressing driving member driving the limit block to move, the first guide member slides to the second flat groove through the first flat groove and the first inclined groove in sequence, and the first pressing claw 16 rotates downward and presses the first section of the coaxial line 101; during the process of the first guide member sliding in the second flat groove (the first pressing claw 16 is always in a state of pressing the first section of the coaxial line 101), the second guide member slides from the second inclined groove to the fourth inclined groove, and the second pressing claw 17 rotates downward and presses the second section of the coaxial line 101. In the present invention, since the distance between the second section of the coaxial line 101 and the circuit board 102 is smaller than the distance between the first section of the coaxial line 101 and the circuit board 102, when the first pressing claw 16 presses the first section of the coaxial line 101, the end of the coaxial line 101 may be warped, and the second pressing claw 17 then presses the second section of the coaxial line 101, thereby avoiding the accident of the end of the coaxial line 101 being warped when pressed at one time. The design of the first pressing claw 16 and the second pressing claw 17 can press the first section and the second section of the coaxial line 101 successively ensures the smoothness and stability of the end of the coaxial line 101 being pressed on the circuit board 102, and improves the welding quality between the coaxial line 101 and the circuit board 102.

[0039] In addition, after the end of the coaxial line 101 is welded to the circuit board 102, the wire pressing drive member drives the limit block to retreat, the second guide member first slides into the third flat groove through the second inclined groove, and the second pressing claw 17 rotates upward and releases the second section of the coaxial line 101; then, the first guide member slides from the first inclined groove to the first flat groove, and the first pressing claw 16 rotates upward and releases the first section of the coaxial line 101. In the present invention, during the solidification of the solder between the coaxial line 101 and the circuit board 102, the second pressing claw 17 first releases the second section of the coaxial line 101, and then the first pressing claw 16 releases the first section of the coaxial line 101, further ensuring the welding quality between the coaxial line 101 and the circuit board 102.

[0040] Furthermore, when the first guide member slides in the first inclined groove, the first pressing claw 16 will gradually tighten or loosen the first section of the coaxial line 101; when the second guide member slides in the second inclined groove, the second pressing claw 17 will gradually tighten or loosen the second section of the coaxial line 101; thereby further ensuring the stability of the connection between the coaxial line 101 and the circuit board 102.

[0041] In one embodiment, if Figure 4 and Figure 5As shown, the first pressing jaw 16 is provided with a first pressing groove (not shown in the figure) adapted to the coaxial line 101, and the first pressing jaw 16 presses the first section of the coaxial line 101 through the first pressing groove; it can be understood that the first pressing groove is arranged at the front end of the first pressing jaw 16, and the first pressing jaw presses the first section of the coaxial line 101 through the first pressing groove, thereby ensuring the stability of the first pressing jaw 16 pressing the coaxial line 101.

[0042] The second pressing jaw 17 is provided with a second pressing groove adapted to the coaxial line 101, and the second pressing jaw 17 presses the second section of the coaxial line 101 through the second pressing groove. It can be understood that the second pressing groove is provided at the front end of the second pressing jaw 17, and the second pressing jaw 17 presses the second section of the coaxial line 101 through the second pressing groove, thereby ensuring the stability of the second pressing jaw 17 pressing the coaxial line 101.

[0043] In one embodiment, if Figure 4 and Figure 5 As shown, the first pressing jaw 16 is provided with a plurality of first pressing grooves distributed at intervals, and the second pressing jaw 17 is provided with a plurality of second pressing grooves distributed at intervals. It can be understood that the number of the first pressing grooves is equal to the number of the second pressing grooves, and the design of the plurality of first pressing grooves and the second pressing grooves enables the clamping mechanism 1 to clamp the plurality of coaxial lines 101 integrated together, thereby improving the working efficiency of the automatic spot welding machine.

[0044] In one embodiment, if Figure 1 As shown, the welding mechanism includes a mobile module 2 and a visual camera 3 and a spot welding head 4 both mounted on the mobile module 2; it can be understood that the mobile module 2 can drive the visual camera 3 and the spot welding head 4 to move in space (that is, movement in the X, Y and Z directions can be achieved), the visual camera 3 can identify the welding position between the coaxial line 101 and the circuit board 102, and the spot welding head 4 can automatically weld the coaxial line 101 to the circuit board 102.

[0045] The automatic spot welding machine further includes a base 8 and a cleaner 9 for cleaning the spot welding head 4, and the mobile drive module and the cleaner 9 are both mounted on the base 8. It can be understood that the support frame 7 is arranged at the front end of the base 8, and the cleaner 9 can play a role in cleaning the spot welding head 4, thereby ensuring the cleanliness of the spot welding head 4.

[0046] like Figure 8 As shown, another embodiment of the present invention further provides a wire harness welding method, which is applied to the above-mentioned automatic spot welding machine, comprising: S100, the lifting drive assembly 51 is used to drive the lifting block 52 to rise, so that the first clamping block 54 and the second clamping block 55 clamp and support the circuit board 102 from both sides; S200, the first moving driving member 11 drives the slider 12 to move, and the slider 12 drives the first pressing claw 16 to rotate to press the first section of the coaxial line 101 by the first roller 14 inserted into the first slide groove group 121, and then the slider 12 rotates by the second roller 15 inserted into the second slide groove group 122 to press the second section of the coaxial line 101; S300 , the welding mechanism welds the coaxial line bundle 101 onto the circuit board 102 .

[0047] Specifically, the coaxial line 101 and the circuit board 102 are located on the carrier 6 and move together to the top of the positioning mechanism 5. The positioning mechanism 5 drives the top block 52 to move upward. The first clamping block 54 and the second clamping block 55 can clamp the circuit board 102 from both sides, and the circuit board 102 is supported on the first clamping block 54 and the second clamping block 55. In the process of the first movable driving member 11 driving the slider 12 to move, the first roller 14 moves in the first slide groove group 121, so that the first pressing claw 16 rotates and presses the first section of the coaxial line 101, and the second roller 15 moves in the second slide groove group 122 and presses the second section of the coaxial line 101, so that the coaxial line 101 is pressed on the carrier 6 by the first pressing claw 16 and the second pressing claw 17. The welding mechanism welds the coaxial line 101 to the circuit board 102. In the present invention, since the distance between the second section of the coaxial line 101 and the circuit board 102 is smaller than the distance between the first section of the coaxial line 101 and the circuit board 102, when the first pressing claw 16 presses the first section of the coaxial line 101, the end of the coaxial line 101 may be tilted, and the second pressing claw 17 presses the second section of the coaxial line 101 afterwards, thereby avoiding the accident of the end of the coaxial line 101 tilting when pressing once, and the design that the first pressing claw 16 and the second pressing claw 17 can press the first section and the second section of the coaxial line 101 successively ensures the smoothness and stability of the end of the coaxial line 101 pressed on the circuit board 102, and improves the welding quality between the coaxial line 101 and the circuit board 102. In addition, the first clamping block 54 and the second clamping block 55 can clamp the circuit board 102 from opposite sides, avoiding the process of the clamping assembly pressing the coaxial line 101, and the phenomenon of displacement between the circuit board 102 and the coaxial line 101, further ensuring the welding quality between the coaxial line 101 and the circuit board 102.

[0048] The above are only embodiments of the automatic spot welding machine of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic spot welding machine for welding coaxial lines on circuit boards, characterized in that: It includes a pressing mechanism, a welding mechanism, a positioning mechanism and a carrier; the coaxial line and the circuit board are both mounted on the carrier; The clamping mechanism comprises a first movable driving member, a slider, a bearing assembly, a first roller, a second roller, and a first pressing claw and a second pressing claw both mounted on the bearing assembly, the slider being provided with a first sliding groove group and a second sliding groove group that are parallel and spaced apart; the first movable driving member is mounted on the bearing assembly and connected to the slider, and the first pressing claw and the second pressing claw are both rotatably connected to the bearing assembly; The first roller is slidably mounted on the first slide groove group and is rotatably connected to the first pressing claw, and the second roller is slidably mounted on the second slide groove group and is rotatably connected to the second pressing claw; The first moving driving member drives the slider to move, and after the slider drives the first pressing claw to rotate to press the first section of the coaxial line by the first roller inserted into the first slide groove group, the slider also rotates by the second roller inserted into the second slide groove group to press the second section of the coaxial line; wherein the distance between the first section and the circuit board is greater than the distance between the second section and the circuit board; The positioning mechanism comprises a top block installed on the top block by a top drive assembly; the top block is provided with a first clamping block and a second clamping block distributed at intervals; the top drive assembly is used to drive the top block to rise, so that the first clamping block and the second clamping block clamp and support the circuit board from both sides; The welding mechanism is used for welding the coaxial line onto the circuit board.

2. The automatic spot welding machine according to claim 1, characterized in that: The carrier is provided with a positioning hole, and the positioning mechanism also includes a positioning pin installed on the top block. The lifting drive assembly is used to drive the top block to rise, and also enables the positioning pin to be inserted into the positioning hole.

3. The automatic spot welding machine according to claim 2, characterized in that: The positioning mechanism further includes a third roller and a support seat provided with a second guide through hole; an end of the top block away from the positioning pin passes through the second guide through hole and then connects to the third roller; The lifting drive assembly comprises a second moving drive member and a bottom plate provided with an inclined surface, and the third roller abuts against the inclined surface; The second moving driving member is used to drive the bottom plate to move, and the bottom plate drives the top block to move up and down through the third roller abutting against the inclined surface.

4. The automatic spot welding machine according to claim 3, characterized in that: The top block is provided with a first through hole, and the jacking drive assembly further comprises a limiting claw mounted on the bottom plate, the limiting claw extends into the through hole and abuts against the third roller.

5. The automatic spot welding machine according to claim 3, characterized in that: The automatic spot welding machine also includes a support frame installed on the support seat, the bearing assembly is installed on the support frame, and the clamping mechanism is located above the positioning mechanism.

6. The automatic spot welding machine according to claim 1, characterized in that: The bearing assembly includes a carrier block, a guide plate, and a first rotating shaft and a second rotating shaft both fixedly mounted on the guide plate; the first moving driving member and the guide plate are both mounted on the carrier block; the first rotating shaft is rotatably connected to the first pressing claw, and the second rotating shaft is rotatably connected to the second pressing claw; The slider drives the first pressing claw to rotate around the first rotating shaft to press the first section of the coaxial line by inserting the first roller of the first sliding groove group; The slider also drives the second pressing claw to rotate around the second rotating shaft to press the second section of the coaxial line through the second roller inserted into the first sliding groove group.

7. The automatic spot welding machine according to claim 1, characterized in that: The first slide groove group includes a first flat groove, a first inclined groove and a second flat groove connected in sequence, and the second slide groove group includes a third flat groove, a second inclined groove and a fourth flat groove connected in sequence; the first flat groove, the second flat groove, the third flat groove and the fourth flat groove are parallel to each other; the first inclined groove and the second inclined groove are parallel; the distance between the second flat groove and the bottom of the bearing component is equal to the distance between the fourth flat groove and the bottom of the bearing component.

8. The automatic spot welding machine according to claim 1, characterized in that: The first pressing jaw is provided with a first pressing groove adapted to the coaxial line, and the first pressing jaw presses the first section of the coaxial line through the first pressing groove; The second pressing jaw is provided with a second pressing groove matched with the coaxial line, and the second pressing jaw presses the second section of the coaxial line through the second pressing groove.

9. The automatic spot welding machine according to claim 1, characterized in that: The welding mechanism includes a mobile module and a visual camera and a spot welding head both mounted on the mobile module; The automatic spot welding machine also includes a base and a cleaner for cleaning the spot welding head, and the mobile driving module and the cleaner are both installed on the base.

10. A wire harness welding method, applied to the automatic spot welding machine according to any one of claims 1 to 9, characterized in that: include: The lifting drive assembly is used to drive the lifting block to rise, so that the first clamping block and the second clamping block clamp and support the circuit board from both sides; The first moving driving member drives the slider to move, and after the slider drives the first pressing claw to rotate to press the first section of the coaxial line through the first roller inserted into the first sliding groove group, the slider also rotates through the second roller inserted into the second sliding groove group to press the second section of the coaxial line; The welding mechanism welds the coaxial harness onto the circuit board.

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