Spot welding device

Abstract

The invention relates to the technical field of spot welding device tools, and provides a spot welding device.A conveying assembly comprises two conveying supports and a conveying belt, the two conveying supports are symmetrically arranged in the second direction, and the conveying belt is in transmission connection with the conveying supports and installed on the adjacent sides of the two conveying supports; the two conveying supports can limit movement of a workpiece in the second direction, two threaded rods in the adjusting assembly are coaxially connected through a coupler, the thread directions of the two threaded rods are opposite, two first support supports are in threaded connection with the two threaded rods in a one-to-one correspondence mode, each first support support is fixed to one conveying support, and the two first support supports are fixed to the other conveying support in a one-to-one correspondence mode. The two conveying supports have the two states of getting close to each other and getting away from each other. The spot welding assembly is located at the machining position. The distance between the two conveying supports is adjusted through the adjusting assembly, so that the conveying device can be suitable for conveying workpieces of various sizes.

Description

Technical Field

[0001] The invention relates to the technical field of spot welding device tooling, in particular to a spot welding device. Background Art

[0002] Spot welding is a process in which the spot welding electrode applies and maintains a certain pressure on the workpiece to keep the workpieces in stable contact. The current output by the welding power supply then passes through the workpiece and their contact surface to generate heat, increase the temperature, and melt the contact point to form a weld spot, thereby achieving the purpose of welding the metal workpieces together.

[0003] Since spot welding requires no consumables, such as welding rods, welding wires, and welding flux, the welding process consumes little heat, contains no harmful substances such as smoke and dust, has no glaring light pollution, and the operating voltage is only a few volts, making it easy to automate.

[0004] The existing spot welding device includes a conveying component and a welding component. The conveying component is responsible for transporting the workpiece, and the welding component is responsible for spot welding the workpiece. Among them, the conveying component generally includes two conveying brackets and two conveyor belts, each conveying bracket is equipped with a conveyor belt, and the two conveying brackets are placed in parallel. The workpiece forms a logistics channel between the two conveying brackets, and moves with the help of the conveyor belt, so as to keep the workpiece stable along the established route without deviation. However, since the gap between the two conveying brackets is generally preset and fixed, the size of the workpiece that can be transported by the conveying component is limited. If the size of the workpiece is too large, it cannot be placed in the logistics channel and contact the conveyor belt. If the size is too small, it cannot be carried on two conveyor belts at the same time. When encountering workpieces of different sizes, the spacing between the conveying brackets can only be adjusted manually, which needs to be disassembled and reinstalled, and the parallelism of the two conveying brackets must be ensured during installation, so the operation is quite cumbersome.

[0005] Therefore, a spot welding device is urgently needed to solve the above-mentioned technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a spot welding device, which can adaptively adjust the spacing of the conveying brackets in the conveying assembly according to the size of the workpiece, so that workpieces of various sizes can be stably placed on two conveyor belts, and can also maintain a certain distance from the side walls of the two conveying brackets, thereby reducing friction during movement.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] Spot welding device, comprising:

[0009] An operating platform, wherein the operating platform is provided with a loading position, a processing position and a unloading position along a first direction;

[0010] A conveying assembly, wherein the conveying assembly comprises a conveying bracket, a conveyor belt and a first driving motor, wherein the conveying bracket extends along the first direction and connects the loading position, the processing position and the unloading position, wherein two conveying brackets are symmetrically arranged in the second direction, wherein the conveyor belt is drivingly connected to the conveying bracket and installed on one side adjacent to the two conveying brackets, and the two conveying brackets can limit the movement of the workpiece in the second direction, and the first driving motor is fixed to the conveying bracket and is used to drive the conveyor belt to rotate;

[0011] An adjustment component, the adjustment component includes a second drive motor, two threaded rods, a coupling, two first bracket supports and a screw bracket, the second drive motor and the screw bracket are both fixed to the working platform, the two threaded rods are coaxially connected through the coupling, and the thread directions of the two threaded rods are opposite, one of the threaded rods is rotatably connected to the screw bracket, the two first bracket supports are threadedly connected to the two threaded rods in a one-to-one correspondence, the second drive motor is used to drive the other threaded rod to rotate around the axial direction, and each of the first bracket supports is respectively fixed to one of the conveying brackets, and the two conveying brackets include two states of approaching each other and moving away from each other;

[0012] A spot welding assembly, the spot welding assembly is located at the processing position;

[0013] The first direction and the second direction are perpendicular to each other.

[0014] As a preferred technical solution of the above-mentioned spot welding device, the above-mentioned spot welding assembly includes an adjusting bracket and a spot welding gun, the above-mentioned adjusting bracket includes a first slide rail, a first slider, a second slide rail, a second slider and a first telescopic member, the above-mentioned first slide rail extends along the above-mentioned first direction and is fixed to the above-mentioned working platform, the above-mentioned first slider is slidably connected to the above-mentioned first slide rail, the above-mentioned second slide rail extends in a vertical direction, and one end of it is fixed to the above-mentioned first slider, the above-mentioned second slider is slidably connected to the above-mentioned second slide rail, one end of the above-mentioned first telescopic member is fixed to the above-mentioned second slider, and the other end is fixed to the above-mentioned spot welding gun and can move it along the above-mentioned second direction.

[0015] As a preferred technical solution of the spot welding device, two spot welding assemblies are provided, and the two spot welding assemblies are symmetrically arranged on both sides of the conveying assembly in the second direction.

[0016] As a preferred technical solution of the above-mentioned spot welding device, it also includes a fixing component, which is located at the above-mentioned processing position. The above-mentioned fixing component includes a lifting unit and a fixing bracket. The above-mentioned lifting unit and the above-mentioned fixing bracket are arranged opposite to each other in the above-mentioned vertical direction. The above-mentioned fixing bracket is fixed to the above-mentioned working platform and is erected above the above-mentioned conveying component. The above-mentioned lifting unit is located between the two above-mentioned conveying brackets. The above-mentioned lifting unit can lift the above-mentioned workpiece along the above-mentioned vertical direction so that the above-mentioned workpiece is clamped between the above-mentioned lifting unit and the above-mentioned fixing bracket.

[0017] As a preferred technical solution of the above-mentioned spot welding device, it also includes a straightening assembly located at the above-mentioned processing position, and the above-mentioned straightening assemblies are provided with two, which are symmetrically arranged on both sides of the above-mentioned conveying assembly in the above-mentioned second direction. The above-mentioned straightening assembly includes a second telescopic member and a straightening block, one end of the above-mentioned second telescopic member is fixed to the above-mentioned working platform, and the other end is fixed to the above-mentioned straightening block, which is used for driving the above-mentioned straightening block to reciprocate along the second direction, and the two above-mentioned straightening blocks are arranged adjacent to each other.

[0018] As a preferred technical solution of the above-mentioned spot welding device, it also includes an auxiliary support component. The above-mentioned auxiliary support components are provided in multiple numbers and are distributed at intervals along the above-mentioned first direction. The above-mentioned auxiliary support component includes a guide rail and a second bracket support. The above-mentioned guide rail is fixed to the above-mentioned working platform and extends along the above-mentioned second direction. The above-mentioned second bracket support is provided with two, one end of which is fixed to the above-mentioned conveying bracket, and the other end is slidably connected to the above-mentioned guide rail.

[0019] As a preferred technical solution of the above-mentioned spot welding device, it also includes a grinding assembly, and the above-mentioned grinding assembly includes a third driving motor and a grinding belt, and the above-mentioned grinding belt is drivingly connected to the output shaft of the above-mentioned third driving motor.

[0020] As a preferred technical solution of the above-mentioned spot welding device, it also includes a positioning component, the above-mentioned positioning component includes a photoelectric sensor, the above-mentioned loading position, the above-mentioned processing position and the above-mentioned unloading position are respectively provided with at least one of the above-mentioned photoelectric sensors, and the above-mentioned photoelectric sensor is arranged between the two above-mentioned conveying brackets for sensing whether there is a workpiece placed above it.

[0021] As a preferred technical solution of the above-mentioned spot welding device, the above-mentioned positioning assembly also includes a third telescopic member, and at least one third telescopic member is arranged between the above-mentioned upper material position and the above-mentioned processing position and between the above-mentioned processing position and the above-mentioned lower material position. One end of the above-mentioned third telescopic member is fixed to the above-mentioned working platform, and the other end can be reciprocated and telescoped along the above-mentioned vertical direction.

[0022] As a preferred technical solution of the spot welding device, a universal wheel and a rotation stop are provided at the bottom of the working platform, the universal wheel is rotatably connected to the working platform, and the rotation stop can limit the movement of the working platform.

[0023] Beneficial effects of the present invention:

[0024] The present application provides a spot welding device, including a work platform, a transmission component, an adjustment component and a welding machine component. Among them, the work platform is provided with a loading position, a processing position and a unloading position along the first direction; the transmission component can carry the workpiece through the loading position, the processing position and the unloading position in sequence, wherein the two transmission brackets can limit the movement of the workpiece in the second direction to ensure the stability of the workpiece during transportation on the conveyor belt. In the adjustment component, when the second drive motor drives one of the threaded rods to rotate, the other threaded rod is driven by the coupling to rotate together, and the first bracket support is threadedly connected with the threaded rod. Since one end of the first bracket support is fixed to the transmission bracket and cannot rotate around the threaded rod, it can only move along the axial direction of the threaded rod. Since the thread directions of the two threaded rods are opposite, the movement directions of the two first bracket supports in the second direction are also opposite, so as to realize that the first bracket supports the transmission bracket to approach or move away from each other in the second direction. Before placing the workpiece, the spacing between the two transmission brackets is adjusted by the adjustment component, so that workpieces of various sizes can be stably placed on the two conveyor belts, and a certain spacing can be maintained with the side walls of the two transmission brackets, and friction can be reduced during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 is a schematic structural diagram of a spot welding device provided by an embodiment of the present invention;

[0027] Figure 2 is a front view of a spot welding device provided by an embodiment of the present invention;

[0028] Figure 3 is a side view of a spot welding device provided by an embodiment of the present invention;

[0029] Figure 4 is a top view of a spot welding device provided by an embodiment of the present invention.

[0030] In the figure:

[0031] X, first direction; Y, second direction;

[0032] 100. Workpiece;

[0033] 10. working platform; 11. universal wheel; 12. anti-rotation member; 121. stud; 122. support plate; 13. support frame; 131. support beam;

[0034] 20. Conveying assembly; 21. Conveying bracket; 211. Transmission wheel; 22. Conveying belt; 23. First driving motor;

[0035] 30. Adjustment assembly; 31. Second drive motor; 32. Threaded rod; 33. Coupling; 34. First bracket support; 35. Screw bracket;

[0036] 40. spot welding assembly; 41. adjustment bracket; 411. first slide rail; 412. first slider; 413. second slide rail; 414. second slider; 415. first telescopic member; 42. spot welding gun;

[0037] 51. Lifting unit; 52. Fixed bracket; 521. Clamping plate;

[0038] 60. Righting assembly; 61. Second telescopic member; 62. Righting block;

[0039] 70. Auxiliary support assembly; 71. Guide rail; 72. Second bracket support;

[0040] 80. grinding assembly; 81. third driving motor; 82. grinding belt;

[0041] 90. Positioning component; 91. Photoelectric sensor; 92. Third telescopic member. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0046] like Figures 1 to 4 As shown, the present application provides a spot welding device, including a work platform 10, a conveying assembly 20, an adjusting assembly 30 and a welding machine assembly. The work platform 10 is provided with a loading position, a processing position and a unloading position along a first direction X; the conveying assembly 20 includes a conveying bracket 21, a conveyor belt 22 and a first driving motor 23. The conveying bracket 21 extends along the first direction X, connecting the loading position, the processing position and the unloading position. Two conveying brackets 21 are symmetrically arranged in the second direction Y. The conveyor belt 22 is transmission-connected to the conveying bracket 21 and installed on one side adjacent to the two conveying brackets 21. The two conveying brackets 21 can limit the movement of the workpiece 100 in the second direction Y. The first driving motor 23 is fixed to the conveying bracket 21 and is used to drive the conveyor belt 22 to rotate; the adjusting assembly 30 includes a second driving motor 31, two threaded rods 3 2. A coupling 33, two first bracket supports 34 and a screw bracket 35, the second drive motor 31 and the screw bracket 35 are all fixed to the working platform 10, the two threaded rods 32 are coaxially connected through the coupling 33, and the thread directions of the two threaded rods 32 are opposite, one of the threaded rods 32 is rotatably connected to the screw bracket 35, the two first bracket supports 34 are threadedly connected to the two threaded rods 32 in a one-to-one correspondence, the second drive motor 31 is used to drive the other threaded rod 32 to rotate around the axis, and each first bracket support 34 is respectively fixed to one of the conveying brackets 21, and the two conveying brackets 21 include two states of approaching each other and moving away from each other; the spot welding assembly 40 is located at the processing position.

[0047] It should be noted that the first direction X and the second direction Y are perpendicular to each other, and in this embodiment, the first direction X and the second direction Y are both horizontal directions.

[0048] Specifically, the conveying bracket 21 is provided with transmission wheels 211 at both ends of the first direction X, the conveyor belt 22 is sleeved on the two transmission wheels 211, the first driving motor 23 can drive the conveyor belt 22 to rotate, the workpiece 100 is placed on the conveyor belt 22 from the loading position, and the conveyor belt 22 can carry the workpiece 100 through the loading position, the processing position and the unloading position in sequence. Further, in order to prevent the workpiece 100 from falling during the transportation of the conveyor belt 22, in the vertical direction, the end face of the conveying bracket 21 is higher than the transmission wheel 211, so that the upper end face of the conveyor belt 22 is lower than the end face of the conveying bracket 21, and because the conveyor belt 22 is installed on the adjacent side of the two conveying brackets 21, that is, when the workpiece 100 is placed on the conveyor belt 22, the workpiece 100 is located between the two conveying brackets 21, and the side walls of the adjacent side of the two conveying brackets 21 on both sides of the second direction Y can abut against the two side walls of the workpiece 100 in the corresponding direction, so as to limit the movement of the workpiece 100 in the second direction Y.

[0049] Furthermore, since the spacing between the two conveying brackets 21 in the second direction Y is greater than the size of the workpiece 100 in the second direction Y, when the width size of the workpiece 100 is different, the spacing between the two conveying brackets 21 also needs to be adaptively adjusted. For this reason, in this embodiment, an adjustment component 30 is also provided. When the second drive motor 31 drives one of the threaded rods 32 to rotate, the other threaded rod 32 is driven by the coupling 33 to rotate together. The first bracket support 34 is threadedly connected to the threaded rod 32. Since one end of the first bracket support 34 is fixed to the conveying bracket 21 and cannot rotate around the threaded rod 32, the first bracket support 34 can only move along the axial direction of the threaded rod 32. Since the thread directions of the two threaded rods 32 are opposite, the movement directions of the two first bracket supports 34 in the second direction Y are also opposite, so that the first bracket support 34 carries the conveying bracket 21 to move closer to or away from each other in the second direction Y. Before placing the workpiece 100, the distance between the two conveying brackets 21 is adjusted by adjusting the component 30, so that workpieces 100 of various sizes can be stably placed on the two conveyor belts 22, and can also maintain a certain distance from the side walls of the two conveying brackets 21 to reduce friction during movement.

[0050] Optionally, the spot welding assembly 40 includes an adjusting bracket 41 and a spot welding gun 42, the adjusting bracket 41 includes a first slide rail 411, a first slider 412, a second slide rail 413, a second slider 414 and a first telescopic member 415, the first slide rail 411 extends along the first direction X and is fixed to the working platform 10, the first slider 412 is slidably connected to the first slide rail 411, the second slide rail 413 extends along the vertical direction, and one end of it is fixed to the first slider 412, the second slider 414 is slidably connected to the second slide rail 413, one end of the telescopic member is fixed to the second slider 414, and the other end is fixed to the spot welding gun 42 and can move it along the second direction Y. The first slide rail 411 is fixed to the work platform to keep the spot welding assembly 40 able to operate stably. The first slider 412 and the first slide rail 411 are slidably matched to meet the displacement of the spot welding gun 42 in the first direction X. The second slide rail 413 is fixed to the first slider 412 so that the first slider 412 can carry the second slide rail 413 to move together when moving. The second slide rail 413 and the second slider 414 are slidably matched to meet the displacement of the spot welding gun 42 in the vertical direction. The first telescopic member 415 can move with the first slider 412 and / or the second slider 414, and the output end of the first telescopic member 415 is fixed to the spot welding gun 42, and can carry the spot welding gun 42 to reciprocate in the second direction Y.

[0051] Optionally, two spot welding assemblies 40 are provided, and the two spot welding assemblies 40 are symmetrically arranged on both sides of the conveying assembly 20 in the second direction Y. In this arrangement, when the workpiece 100 is in the processing position, the two spot welding assemblies 40 can simultaneously perform welding operations on the two sides of the workpiece 100 in the second direction Y, thereby improving work efficiency.

[0052] When the spot welding gun 42 performs welding on the end face of the workpiece 100, a certain force needs to be applied to the workpiece 100. Under the action of the force, the workpiece 100 is prone to shaking or rotating, causing the welding trajectory to shift, affecting the welding quality. When the spot welding gun 42 completes the welding operation, it is also easy to adhere to the side wall of the workpiece 100 at the weld position. When the adjustment bracket 41 controls the spot welding gun 42 to reset, the workpiece 100 will be pulled, causing the workpiece 100 to detach from the conveyor belt 22 or fall from the conveying bracket 21.

[0053] Based on this, in this embodiment, the spot welding device also provides a fixing component, which is located at the processing position. The fixing component includes a lifting unit 51 and a fixed bracket 52. The lifting unit 51 and the fixed bracket 52 are arranged opposite to each other in the vertical direction. The fixed bracket 52 is fixed to the working platform 10 and is erected above the conveying component 20. The lifting unit 51 is located between the two conveying brackets 21. The lifting unit 51 can lift the workpiece 100 in the vertical direction so that the workpiece 100 is clamped between the lifting unit 51 and the fixed bracket 52.

[0054] Specifically, the work platform 10 is fixed with a support frame 13, and the support frame 13 includes a support beam 131 extending along the first direction X, and the support beam 131 is located directly above the conveying assembly 20. One end of the fixed bracket 52 is fixed to the support beam 131, and the other end is fixed with a clamping plate 521, and the clamping plate 521 is between the support beam 131 and the conveying assembly 20 in the vertical direction. The lifting unit 51 is located between the two conveying brackets 21, and the lifting unit 51 includes a fourth telescopic member and a support plate. The output end of the fourth telescopic member is fixed to the support plate and can carry the support plate in the vertical direction. The lifting unit 51 moves back and forth, and includes a retracted state and a supporting state. When it is in the retracted state, the upper end surface of the support plate is lower than the upper end surface of the conveyor belt 22 to avoid interfering with the transportation of the workpiece 100 in the first direction X. When it is necessary to clamp the workpiece 100 in the processing position, the lifting unit 51 switches to the supporting state, and the fourth telescopic member carries the support plate to move upward. The support plate can support the bottom end surface of the workpiece 100 and lift the workpiece 100 to make it separate from the conveyor belt 22 until the upper end surface of the workpiece 100 abuts against the clamping plate 521. In this way, the fixing assembly can fix the workpiece 100 to reduce shaking and maintain stability during the welding operation. By clamping the fixing assembly in the vertical direction, the shielding of the welding area by the clamping member can be reduced, and the lifting unit 51 lifts the workpiece 100, so that the conveying bracket 21 no longer shields the two side walls of the workpiece 100.

[0055] It should be noted that the lifting unit 51 is an existing structure and will not be described in detail here.

[0056] When the size of the workpiece 100 in the vertical direction is relatively small, and the support plate of the lifting unit 51 supports the workpiece 100 to reach the maximum extension range of the fourth telescopic member, the upper end surface of the workpiece 100 still cannot abut against the clamping plate 521, which will cause the fixing component to fail. Therefore, in this embodiment, the fixed bracket 52 also includes a fifth telescopic member, one end of the fifth telescopic member is fixed to the support beam 131, and the other end is fixed to the clamping plate 521. The fifth telescopic member can carry the clamping plate 521 to reciprocate in the vertical direction, thereby cooperating with the lifting unit 51 to complete the clamping work in the vertical direction.

[0057] Since the lifting unit 51 needs to push the workpiece 100 away from the conveyor belt 22 and the limit of the conveyor bracket 21 to perform the welding operation, when the lifting unit 51 is carrying the workpiece 100 to reset, the workpiece 100 will inevitably shift, and the workpiece 100 will be placed on the conveyor bracket 21 without contacting the conveyor belt 22, or although it is placed on the conveyor belt 22, it will abut against the side wall of the conveyor bracket 21.

[0058] Based on this, the spot welding device in this embodiment also includes a straightening assembly 60 located at the processing position, and two straightening assemblies 60 are provided, which are symmetrically arranged on both sides of the conveying assembly 20 in the second direction Y. The straightening assembly 60 includes a second telescopic member 61 and a straightening block 62. One end of the second telescopic member 61 is fixed to the working platform 10, and the other end is fixed to the straightening block 62, which is used to drive the straightening block 62 to move back and forth along the second direction Y, and the two straightening blocks 62 are arranged adjacent to each other. In this way, after the jacking unit 51 is reset, the two straightening assemblies 60 are started at the same time, and the two straightening blocks 62 approach each other along the second direction Y until they are both in contact with the workpiece 100, and then the straightening blocks 62 are reset and move away from each other. The workpiece 100 is re-centered under the correction of the two straightening blocks 62 to ensure that the workpiece 100 is stably placed on the two conveyor belts 22, and the two side walls of the workpiece 100 are parallel to the adjacent two side walls of the two conveying brackets 21.

[0059] Optionally, the spot welding device further includes an auxiliary support assembly 70, which is provided with a plurality of auxiliary support assemblies 70 and is spaced apart along the first direction X. The auxiliary support assembly 70 includes a guide rail 71 and a second bracket support 72, the guide rail 71 is fixed to the work platform 10 and extends along the second direction Y, and two second bracket supports 72 are provided, one end of which is fixed to the conveying bracket 21, and the other end is slidably connected to the guide rail 71. In this way, the auxiliary support assembly 70 provides more support for the conveying bracket 21 to avoid stress concentration, which causes the conveying bracket 21 to bend.

[0060] When the spot welding gun 42 is used for repeated welding, impurities are attached to the surface of the electrode. For example, the metal melted during spot welding is attached to the surface of the electrode. This will affect the quality of the next processing operation of the spot welding gun 42. Based on this, in the present embodiment, the spot welding device also includes a grinding assembly 80, and the grinding assembly 80 includes a third drive motor 81 and a grinding belt 82, and the grinding belt 82 is connected to the output shaft of the third drive motor 81. In this way, after the spot welding gun 42 completes the spot welding operation each time, the adjustment bracket 41 carries the spot welding gun 42 to the position of the grinding assembly 80, so that the electrode of the spot welding gun 42 contacts the grinding belt 82, and the third drive motor 81 drives the grinding belt 82 to rotate to clean the electrode.

[0061] Optionally, the spot welding device also includes a positioning component 90, which includes a photoelectric sensor 91. The loading position, processing position and unloading position are respectively provided with at least one photoelectric sensor 91. The photoelectric sensor 91 is arranged between two conveying brackets 21 to sense whether a workpiece 100 is placed above it.

[0062] Specifically, in the present embodiment, the spot welding device further comprises a controller, and the photoelectric sensor 91, the conveying assembly 20, the fixing assembly, the spot welding assembly 40, the straightening assembly 60 and the grinding assembly 80 are all communicatively connected with the controller. When the photoelectric sensor 91 located at the loading position detects that a workpiece 100 is placed at the loading position, the controller controls the first drive motor 23 to start, and the conveyor belt 22 carries the workpiece 100 to the processing position. When the photoelectric sensor 91 at the processing position detects that the workpiece 100 has reached the processing position, the first drive motor 23 is turned off; the lifting unit 51 is started, and the two adjacent end surfaces of the support plate and the clamping plate 521 of the fixing assembly are provided with touch switches. When both touch switches are triggered, the workpiece 100 is deemed to have been fixed. If only one touch switch is triggered and the fourth telescopic member has reached its maximum extension range, the controller controls the fifth telescopic member to carry the clamping plate 521 to move downward. The workpiece 100 is moved to clamp the workpiece 100 until both touch switches are triggered; the grinding assembly 80 and the spot welding assembly 40 are started, the third drive motor 81 starts to rotate with the grinding belt 82, the adjustment bracket 41 carries the spot welding gun 42 to move to the grinding belt 82, and its electrode is cleaned, and then the adjustment bracket 41 carries the spot welding gun 42 to perform spot welding operation on the workpiece 100 along the preset operation trajectory. After the spot welding operation is completed, the adjustment bracket 41 carries the spot welding gun 42 to reset, avoid the workpiece 100, and the lifting unit 51 is reset, and the workpiece 100 is put back to the conveying assembly 20. The straightening assembly 60 is started, and the second telescopic member 61 drives the straightening block 62 to correct the placement state of the workpiece 100 and reset; after the above actions are completed, the first drive motor 23 is restarted, and the conveyor belt 22 carries the workpiece 100 that has been processed to the unloading position, and sends the workpiece 100 to be processed into the processing position.

[0063] Furthermore, the adjustment component 30 is connected to the controller for communication. By inputting the size of the workpiece 100 to be processed into the controller, the controller controls the adjustment component 30 to start, and adjusts the spacing between the two conveying brackets 21 through the adjustment component 30 to accommodate the workpiece 100.

[0064] Furthermore, the positioning component 90 also includes an anti-foolproof plate, which is fixed to the side end face of the workpiece 100 that should contact the conveyor belt 22. The anti-foolproof plate can trigger the photoelectric sensor 91 when it is facing the photoelectric sensor 91. When the photoelectric sensor 91 of the loading position only detects that there is a workpiece 100 placed at the loading position, but does not detect the anti-foolproof plate, it is deemed that the workpiece 100 is placed upside down and the conveyor belt 22 remains stationary.

[0065] Furthermore, the spot welding device also includes an alarm, which can use sound effects or visual effects to prompt the staff that the workpiece 100 is placed upside down and needs to be corrected, or to prompt that there is a completed workpiece 100 parked at the unloading position, asking the staff to take away the workpiece 100 at the unloading position, etc.

[0066] Since the workpiece 100 has a certain mass, when the conveyor belt 22 stops, the workpiece 100 continues to move in the forward direction due to inertia, resulting in a deviation in the positioning of the workpiece 100 .

[0067] Optionally, the positioning assembly 90 further includes a third telescopic member 92, and at least one third telescopic member 92 is provided between the loading position and the processing position and between the processing position and the unloading position, and one end of the third telescopic member 92 is fixed to the working platform 10, and the other end can reciprocate in the vertical direction. In this way, when the photoelectric sensor 91 detects the workpiece 100, the third telescopic member 92 is extended in the vertical direction and abuts against the end face of the workpiece 100 in the first direction X to limit the workpiece 100 from entering the next station.

[0068] Optionally, a universal wheel 11 and a rotation-stopping member 12 are provided at the bottom of the working platform 10 . The universal wheel 11 is rotationally connected to the working platform 10 , and the rotation-stopping member 12 can limit the movement of the working platform 10 .

[0069] Specifically, in this embodiment, the stopper 12 includes a stud 121 and a support plate 122. Four studs 121 are provided and extend in the vertical direction. The studs 121 are installed at the bottom of the working platform 10 and are respectively located at four corners. The support plate 122 is coaxially threaded with the stud 121. When the working platform 10 needs to be moved, the support plate 122 is away from the ground, so that the universal wheel 11 can carry the working platform 10 to move. When the working platform 10 needs to be fixed, the support plate 122 is rotated so that it abuts against the ground and the universal wheel 11 is separated from the ground.

[0070] In other embodiments, the anti-rotation member 12 can also lock the universal wheel 11 so that the universal wheel 11 cannot rotate, thereby achieving the effect of fixing the working platform 10. This is an existing structure and will not be described in detail here.

[0071] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Spot welding device, characterized in that, include: An operating platform (10), wherein the operating platform (10) is provided with a loading position, a processing position and a unloading position along a first direction (X); A conveying assembly (20), the conveying assembly (20) comprising a conveying support (21), a conveyor belt (22) and a first driving motor (23), the conveying support (21) extending along the first direction (X) and connecting the loading position, the processing position and the unloading position, two conveying supports (21) are symmetrically arranged in the second direction (Y), the conveyor belt (22) is transmission-connected to the conveying support (21) and installed on one side adjacent to the two conveying supports (21), and the two conveying supports (21) can limit the movement of the workpiece (100) in the second direction (Y), and the first driving motor (23) is fixed to the conveying support (21) and is used to drive the conveyor belt (22) to rotate; An adjustment component (30), the adjustment component (30) comprising a second drive motor (31), two threaded rods (32), a coupling (33), two first bracket supports (34) and a screw bracket (35), the second drive motor (31) and the screw bracket (35) are both fixed to the working platform (10), the two threaded rods (32) are coaxially connected through the coupling (33), and the thread directions of the two threaded rods (32) are opposite, one of the threaded rods (32) is rotatably connected to the screw bracket (35), the two first bracket supports (34) are threadedly connected to the two threaded rods (32) in a one-to-one correspondence, the second drive motor (31) is used to drive the other threaded rod (32) to rotate around the axial direction, and each of the first bracket supports (34) is respectively fixed to one of the conveying brackets (21), and the two conveying brackets (21) include two states of approaching each other and moving away from each other; A spot welding assembly (40), wherein the spot welding assembly (40) is located at the processing position; The first direction (X) and the second direction (Y) are perpendicular to each other.

2. The spot welding device according to claim 1, characterized in that: The spot welding assembly (40) comprises an adjustment bracket (41) and a spot welding gun (42); the adjustment bracket (41) comprises a first slide rail (411), a first slider (412), a second slide rail (413), a second slider (414) and a first telescopic member (415); the first slide rail (411) extends along the first direction (X) and is fixed to the working platform (10); the first slider (412) is slidably connected to the first slide rail (411); the second slide rail (413) extends along a vertical direction and one end of the second slide rail is fixed to the first slider (412); the second slider (414) is slidably connected to the second slide rail (413); one end of the first telescopic member (415) is fixed to the second slider (414) and the other end is fixed to the spot welding gun (42) and can move the spot welding gun along the second direction (Y).

3. The spot welding device according to claim 2, characterized in that: Two spot welding assemblies (40) are provided, and the two spot welding assemblies (40) are symmetrically arranged on both sides of the conveying assembly (20) in the second direction (Y).

4. The spot welding device according to claim 3, characterized in that: The invention also comprises a fixing component, which is located at the processing position, and comprises a lifting unit (51) and a fixing bracket (52). The lifting unit (51) and the fixing bracket (52) are arranged opposite to each other in the vertical direction. The fixing bracket (52) is fixed to the working platform (10) and is erected above the conveying component (20). The lifting unit (51) is located between the two conveying brackets (21). The lifting unit (51) can lift the workpiece (100) in the vertical direction so that the workpiece (100) is clamped between the lifting unit (51) and the fixing bracket (52).

5. The spot welding device according to claim 4, characterized in that: It also includes a straightening component (60) located at the processing position, wherein two straightening components (60) are provided and are symmetrically arranged on both sides of the conveying component (20) in the second direction (Y), and the straightening component (60) includes a second telescopic member (61) and a straightening block (62), one end of the second telescopic member (61) is fixed to the working platform (10), and the other end is fixed to the straightening block (62), and is used to drive the straightening block (62) to reciprocate along the second direction (Y), and the two straightening blocks (62) are arranged adjacent to each other.

6. The spot welding device according to claim 1, characterized in that: It also includes an auxiliary support assembly (70), wherein the auxiliary support assembly (70) is provided in plurality and is spaced apart along the first direction (X), wherein the auxiliary support assembly (70) includes a guide rail (71) and a second bracket support (72), wherein the guide rail (71) is fixed to the working platform (10) and extends along the second direction (Y), and wherein two second bracket supports (72) are provided, one end of which is fixed to the conveying bracket (21), and the other end of which is slidably connected to the guide rail (71).

7. The spot welding device according to claim 1, characterized in that: It also comprises a grinding assembly (80), wherein the grinding assembly (80) comprises a third driving motor (81) and a grinding belt (82), wherein the grinding belt (82) is drivingly connected to an output shaft of the third driving motor (81).

8. The spot welding device according to claim 1, characterized in that: The invention also comprises a positioning component (90), wherein the positioning component (90) comprises a photoelectric sensor (91), wherein the loading position, the processing position and the unloading position are respectively provided with at least one photoelectric sensor (91), and the photoelectric sensor (91) is arranged between the two conveying brackets (21) to sense whether a workpiece (100) is placed above the workpiece.

9. The spot welding device according to claim 8, characterized in that: The positioning assembly (90) also includes a third telescopic member (92), and at least one third telescopic member (92) is provided between the upper material position and the processing position and between the processing position and the lower material position. One end of the third telescopic member (92) is fixed to the working platform (10), and the other end can reciprocate and telescope in the vertical direction.

10. The spot welding device according to any one of claims 1 to 9, characterized in that: A universal wheel (11) and a rotation-stopping member (12) are provided at the bottom of the working platform (10); the universal wheel (11) is rotationally connected to the working platform (10); and the rotation-stopping member (12) can limit the movement of the working platform (10).

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