A resistance welding device

Abstract

The present invention relates to a resistance welding device, which includes a substrate, a left mounting plate, a right mounting plate, a power unit, a conductive electrode unit, a welding electrode unit, a conductive electrode rotation driving unit, and a welding electrode rotation driving unit. The left mounting plate and the right mounting plate are both arranged directly in front of the substrate. The conductive electrode unit is arranged directly in front of the left mounting plate and includes a disc-shaped conductive electrode and a left clamping unit. The welding electrode unit is arranged directly in front of the right mounting plate and is opposite to the conductive electrode unit, and includes a disc-shaped welding electrode and a right clamping unit. The power unit operates to drag the conductive electrode unit and the welding electrode unit to move upward until they are respectively aligned with the conductive electrode rotation driving unit and the welding electrode rotation driving unit. The conductive electrode rotation driving unit and the welding electrode rotation driving unit operate to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to respectively rotate circumferentially by a predetermined angle.

Description

Technical Field

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

[0002] With the development of industries such as aerospace, electronics, automobiles, and household appliances, resistance welding has received more and more extensive attention. Resistance welding is a method of heating a workpiece to a molten or plastic state by using the resistance heat generated when an electric current flows through the contact surface and adjacent areas of the workpiece, so as to form a metal bond. Taking spot welding as an example, it assembles the workpieces into a lap joint and compresses them between a conductive electrode and a welding electrode, and uses the resistance heat to melt the base metal to form a spot welding method for the weld spot. In the prior art, both the conductive electrode and the welding electrode are columnar electrodes, and the workpieces are compressed and subsequently welded by electric heating through their lower end surfaces. However, after a period of use, it is actually found that there are a large number of pitting corrosion and even pits on the lower end surfaces of the conductive electrode and the welding electrode, which have a serious adverse impact on the final welding quality of the workpieces, mainly manifested in the poor density and regularity of the formed weld seams, and then resulting in a decrease in the welding connection strength of the workpieces. Therefore, it is urgent for technical personnel to solve the above problems. Summary of the Invention

[0003] Therefore, in view of the above existing problems and defects, the designers of the present invention collected relevant materials, evaluated and considered them from multiple aspects, and through continuous experiments and modifications by technical personnel with many years of R & D experience in this industry, finally led to the emergence of this resistance welding device.

[0004] To solve the above technical problems, the present invention relates to a resistance welding device, which includes a substrate, a left mounting plate, a right mounting plate, a power unit, a conductive electrode unit, a welding electrode unit, a conductive electrode rotation driving unit, and a welding electrode rotation driving unit. The left mounting plate and the right mounting plate are both arranged in parallel in front of the substrate and are arranged side by side. The conductive electrode unit is arranged in parallel in front of the left mounting plate and includes a disc-shaped conductive electrode and a left clamping unit. When the left clamping unit operates, the disc-shaped conductive electrode is switched between a free rotation state and a locked state. The welding electrode unit is arranged in parallel in front of the right mounting plate and is arranged opposite to the conductive electrode unit. It includes a disc-shaped welding electrode and a right clamping unit. When the right clamping unit operates, the disc-shaped welding electrode is switched between a free rotation state and a locked state. The power unit is fixed to the substrate to simultaneously drive the conductive electrode unit and the welding electrode unit to perform displacement movements synchronously in the vertical direction. The conductive electrode rotation driving unit is fixed on the left mounting plate and is arranged on the left side of the conductive electrode unit. The welding electrode rotation driving unit is fixed on the right mounting plate and is arranged on the left side of the welding electrode unit. The power unit operates to drag the conductive electrode unit to move upward in displacement until the disc-shaped conductive electrode is aligned with the conductive electrode rotation driving unit. At the same time, it drags the welding electrode unit to move upward in displacement until the disc-shaped welding electrode is aligned with the welding electrode rotation driving unit. The conductive electrode rotation driving unit and the welding electrode rotation driving unit operate to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to rotate by a set angle around their respective central axes.

[0005] As a further improvement of the technical solution of the invention, the conductive electrode rotation driving unit includes a left linear motion element, a left rack, a left gear, a left bearing seat, a first slide block assembly, and a left transmission shaft. The left bearing seat is arranged in front of the left mounting plate and follows the conductive electrode unit to perform synchronous displacement movement under the action of the first slide block assembly. The left transmission shaft passes through the left bearing seat, and its right end is directly fixed integrally with the disc-shaped conductive electrode. The left linear motion element is detachably fixed on the left mounting plate to drive the left rack to perform reciprocating displacement in the front-rear direction. The left gear adapted to the left rack is sleeved on the left transmission shaft to drive the left transmission shaft to perform synchronous rotational movement therewith.

[0006] Analogous to the rotating drive unit of the conductive electrode, the rotating drive unit of the welding electrode includes a right linear motion element, a right rack, a right gear, a right bearing block, a second slide block assembly, and a right transmission shaft. The right bearing block is arranged directly in front of the right mounting plate and, with the assistance of the second slide block assembly, follows the welding electrode unit for synchronous displacement movement. The right transmission shaft passes through the right bearing block, and its left end is directly fixed integrally with the disc-shaped welding electrode. The right linear motion element is detachably fixed to the right mounting plate to drive the right rack to reciprocate in the front-rear direction. The right gear adapted to the right rack is sleeved on the right transmission shaft to drive the right transmission shaft to rotate synchronously with it.

[0007] As a further improvement of the inventive technical solution, the resistance welding device further includes a contact displacement sensor. The contact displacement sensor is fixed to the substrate and is arranged directly corresponding to the right bearing block.

[0008] As a further improvement of the inventive technical solution, both the left linear motion element and the right linear motion element are preferably any one of a cylinder, a hydraulic cylinder, and a linear motor.

[0009] As a further improvement of the inventive technical solution, the power unit includes an upper linear motion element, a sliding block, a guide plate, a third slide block assembly, a roller assembly, and a load-bearing seat. The upper linear motion element is detachably fixed to the substrate and, with the combined action of the third slide block assembly, drags the sliding block to displace in the left-right direction. The guide plate is detachably fixed to the front side wall of the sliding block, and a guide groove adapted to the roller assembly is provided thereon. The roller assembly is inserted into the load-bearing seat and is fixed to both the conductive electrode unit and the welding electrode unit as a whole. When the upper linear motion element acts, the roller assembly always displaces along the guide groove to simultaneously pull up / push down the conductive electrode unit and the welding electrode unit.

[0010] As a further improvement of the inventive technical solution, the power unit further includes a limiting assembly. The limiting assembly is fixed to the substrate and is arranged directly on the right side of the third slide block assembly. The limiting assembly includes a load-bearing plate, a limiting bolt, and a hydraulic buffer. The limiting bolt and the hydraulic buffer are inserted into the load-bearing plate side by side and are both positioned opposite to the sliding block.

[0011] As a further improvement of the inventive technical solution, the upper linear motion element is preferably any one of a cylinder, a hydraulic cylinder, and a linear motor.

[0012] As a further improvement of the technical solution of the invention, the right mounting plate is detachably fixed to the substrate. The resistance welding device further includes a fourth slide rail slider assembly and a pushing and pulling member. The fourth slide rail slider assembly is arranged between the substrate and the left mounting plate. The pushing and pulling member is fixed to the substrate and arranged on the left side of the left mounting plate to drag the left mounting plate to slide along the left-right direction.

[0013] As a further improvement of the technical solution of the invention, the pushing and pulling member is preferably a quick-action toggle clamp.

[0014] Compared with the resistance welding device of the traditional design structure, in the technical solution disclosed by the present invention, a conductive electrode rotation driving part and a welding electrode rotation driving part are additionally provided and are respectively used in cooperation with the disc-shaped conductive electrode and the disc-shaped welding electrode. After the resistance welding device has been applied for a period of time, when the working surfaces of the disc-shaped conductive electrode and the disc-shaped welding electrode are damaged, the left clamping unit and the right clamping unit act to respectively loosen the clamping of the disc-shaped conductive electrode and the disc-shaped welding electrode, so that the disc-shaped conductive electrode and the disc-shaped welding electrode can freely rotate around their own central axes; subsequently, the conductive electrode rotation driving part and the welding electrode rotation driving part act to respectively drive the disc-shaped conductive electrode and the disc-shaped welding electrode to rotate by a set angle, so that the damaged working surfaces on the disc-shaped conductive electrode and the disc-shaped welding electrode are circumferentially offset by a certain angle relative to the weldment, and the new and undamaged working surfaces on the disc-shaped conductive electrode and the disc-shaped welding electrode participate in the welding process. In this way, the welding quality of the resistance welding device is effectively guaranteed, that is, the density and the forming regularity of the formed weld seam are ensured, and further the good bonding strength of the weldment after welding is ensured. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a perspective schematic diagram of a perspective of the resistance welding device in the present invention.

[0017] Figure 2 It is a perspective schematic diagram of another perspective of the resistance welding device in the present invention.

[0018] Figure 3 is Figure 1 The I partial enlarged view of.

[0019] Figure 4 is Figure 2 The II partial enlarged view of.

[0020] Figure 5 is Figure 1 the front view of

[0021] Figure 6 is Figure 5 the A-A sectional view of

[0022] Figure 7 is Figure 5 the enlarged view of part III of

[0023] Figure 8 is Figure 5 the B-B sectional view of

[0024] Figure 9 is the perspective schematic view of the disc-shaped conductive electrode in the resistance welding equipment of the present invention.

[0025] Figure 10 is the perspective schematic view of the disc-shaped welding electrode in the resistance welding equipment of the present invention.

[0026] Figure 11 is the perspective schematic view of the left clamping unit in the resistance welding equipment of the present invention.

[0027] Figure 12 is the perspective schematic view of the right clamping unit in the resistance welding equipment of the present invention.

[0028] 1 - Substrate; 2 - Left mounting plate; 3 - Right mounting plate; 4 - Power unit; 41 - Upper linear motion element; 42 - Sliding block; 43 - Guide plate; 431 - Guide groove; 44 - Third slide rail slider assembly; 45 - Roller assembly; 46 - Load-bearing seat; 47 - Limit assembly; 471 - Load-bearing plate; 472 - Limit bolt; 473 - Hydraulic buffer; 5 - Conductive electrode part; 51 - Disc-shaped conductive electrode; 52 - Left clamping unit; 6 - Welding electrode part; 61 - Disc-shaped welding electrode; 62 - Right clamping unit; 7 - Conductive electrode rotation drive part; 71 - Left linear motion element; 72 - Left rack; 73 - Left gear; 74 - Left bearing seat; 75 - First slide rail slider assembly; 76 - Left transmission shaft; 8 - Welding electrode rotation drive part; 81 - Right linear motion element; 82 - Right rack; 83 - Right gear; 84 - Right bearing seat; 85 - Second slide rail slider assembly; 86 - Right transmission shaft; 9 - Contact displacement sensor; 10 - Fourth slide rail slider assembly; 11 - Quick elbow clamp. Detailed implementation mode

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "left", "right", "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0030] To facilitate those skilled in the art to fully understand the technical solutions disclosed in the present invention, the following further details the content of the present invention in combination with specific embodiments. Figure 1 、 Figure 2 Stereoscopic schematic diagrams of two different perspectives of the resistance welding equipment in the present invention are respectively shown. It can be seen that it mainly consists of a substrate 1, a left-mounted mounting plate 2, a right-mounted mounting plate 3, a power unit 4, a conductive electrode part 5, a welding electrode part 6, a conductive electrode rotation driving part 7, a welding electrode rotation driving part 8, etc. Among them, the left-mounted mounting plate 2 and the right-mounted mounting plate 3 are both arranged parallel to the front of the substrate 1, side by side, and spaced apart by a set distance. As Figure 5 shown, the conductive electrode part 5 is arranged parallel to the front of the left-mounted mounting plate 2, and it includes a disc-shaped conductive electrode 51 (as Figure 9 shown) and a left clamping unit 52 (as Figure 11 shown). When the left clamping unit 52 operates, it enables the disc-shaped conductive electrode 51 to switch between a free rotation state and a locked state. The welding electrode part 6 is arranged parallel to the front of the right-mounted mounting plate 3 and is opposite to the conductive electrode part 5. It includes a disc-shaped welding electrode 61 (as Figure 8 、 10 shown) opposite to the right clamping unit 62 and the right clamping unit 62 (as Figure 12). When the right clamping unit 62 is activated, the disc-shaped welding electrode 61 is switched between a free rotation state and a locked state. Since the design of the left clamping unit 52 and the right clamping unit 62 is an existing mature technology, it is not repeated here. The power unit 4 is fixed to the base plate 1 to simultaneously drive the conductive electrode part 5 and the welding electrode part 6 to synchronously move in the up and down directions. The conductive electrode rotation drive part 7 is fixed to the left mounting plate 2 and arranged on the left side of the conductive electrode part 5. The welding electrode rotation drive part 8 is fixed to the right mounting plate 3 and arranged on the left side of the welding electrode part 6. The power unit 4 is activated to drag the conductive electrode part 5 to move upward until the disc-shaped conductive electrode 51 is aligned with the conductive electrode rotation drive part 7. At the same time, the welding electrode part 6 is dragged to move upward until the disc-shaped welding electrode 61 is aligned with the welding electrode rotation drive part 8. The conductive electrode rotation drive unit 7 and the welding electrode rotation drive unit 8 are activated to drive the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 to rotate around their respective central axes at set angles. In this way, the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 can be rotated in real time according to the actual damage condition of the welding working surface, so that the new working surface can participate in the welding operation, thereby effectively ensuring the welding quality of the resistance welding equipment, that is, ensuring the density and regularity of the formed weld, and then ensuring that the weldment has good bonding strength after welding.

[0031] The working principle of the above-mentioned resistance welding equipment is roughly as follows: after the resistance welding equipment has been used for a period of time, when the working surfaces of the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61 are damaged, the left clamping unit 52 and the right clamping unit 62 are actuated to respectively loosen the clamping of the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61, so that the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61 can freely rotate around their own central axes; then, the conductive electrode rotation drive unit 7 and the welding electrode rotation drive unit 8 are actuated to respectively drive the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61 to rotate at a set angle, thereby making the damaged working surfaces on the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61 staggered at a certain angle relative to the circumference of the weldment, so that the new, undamaged working surfaces on the disk-shaped conductive electrode 51 and the disk-shaped welding electrode 61 participate in the welding process.

[0032] As is known, the conductive electrode rotation driving unit 7 can adopt a variety of design structures to realize the rotation driving of the disc-shaped conductive electrode 51. However, here we recommend an implementation scheme that is simple in structure design, easy to manufacture and easy to maintain and repair in the later stage, as follows: Figure 3As shown in the figure, the conductive electrode rotation driving part 7 preferably includes a left linear motion element 71, a left rack 72, a left gear 73, a left bearing seat 74, a first slide rail slider assembly 75, and a left transmission shaft 76. The left bearing seat 74 is arranged directly in front of the left mounting plate 2, and follows the conductive electrode part 5 to perform synchronous displacement movement under the action of the first slide rail slider assembly 75. The left transmission shaft 76 passes through the left bearing seat 74, and its right end is directly fixed integrally with the disc-shaped conductive electrode 51. The left linear motion element 71 is detachably fixed to the left mounting plate 2 to drive the left rack 72 to perform reciprocating displacement along the front-back direction. The left gear 73 adapted to the left rack 72 is sleeved on the left transmission shaft 76 to drive the left transmission shaft 76 to perform synchronous rotation movement therewith. In addition, it should be noted here that the gear-rack drive has the advantages of high running speed, stable running, high transmission accuracy, accurate transmission ratio, and high transmission efficiency, which is conducive to realizing the precise drive of the rotational movement of the disc-shaped conductive electrode 51.

[0033] For the same design purpose, the welding electrode rotation driving part 8 can also refer to the above-mentioned conductive electrode rotation driving part 7 for structural design, as follows: As Figure 4 shown in the figure, the welding electrode rotation driving part 8 preferably includes a right linear motion element 81, a right rack 82, a right gear 83, a right bearing seat 84, a second slide rail slider assembly 85, and a right transmission shaft 86. The right bearing seat 84 is arranged directly in front of the right mounting plate 3, and follows the welding electrode part 6 to perform synchronous displacement movement under the action of the second slide rail slider assembly 85. The right transmission shaft 86 passes through the right bearing seat 84, and its left end is directly fixed integrally with the disc-shaped welding electrode 61. The right linear motion element 81 is detachably fixed to the right mounting plate 3 to drive the right rack 82 to perform reciprocating displacement along the front-back direction. The right gear 83 adapted to the right rack 82 is sleeved on the right transmission shaft 86 to drive the right transmission shaft 86 to perform synchronous rotation movement therewith.

[0034] Furthermore, by Figure 2 、 Figure 5It can also be seen that the resistance welding equipment is additionally provided with a contact displacement sensor 9. The contact displacement sensor 9 is detachably fixed on the substrate 1 and is arranged exactly corresponding to the above-mentioned right bearing seat 84. When the power unit 4 acts to drive the conductive electrode part 5 and the welding electrode part 6 to move upward synchronously, the contact displacement sensor 9 can be used to detect the real-time displacement of the conductive electrode part 5 and the welding electrode part 6 in real time, so as to ensure the accuracy of the alignment between the left gear 73, the right gear 83 and the left rack 72, the right rack 82, and further ensure the smoothness and accuracy of the rotation drive of the left linear motion element 71 and the right linear motion element 81 on the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 respectively.

[0035] In addition, it can also be known from Figure 5 , 6 shown in that, as a further refinement of the above-mentioned resistance welding equipment structure, the power unit 4 preferably includes an upper linear motion element 41, a sliding block 42, a guide plate 43, a third slide rail slider assembly 44, a roller assembly 45 and a bearing seat 46. The upper linear motion element 41 is detachably fixed on the substrate 1 and, with the cooperation of the third slide rail slider assembly 44, drives the sliding block 42 to move along the left-right direction. The guide plate 43 is detachably fixed on the front side wall of the sliding block 42, and a guide groove 431 adapted to the roller assembly 45 is provided thereon. The roller assembly 45 is inserted on the bearing seat 46 and is fixed to both the conductive electrode part 5 and the welding electrode part 6 as a whole. When the upper linear motion element 41 acts, the roller assembly 45 always moves along the guide groove 431 to simultaneously pull up / push down the conductive electrode part 5 and the welding electrode part 6. By adopting the above technical solution, the conductive electrode part 5 and the welding electrode part 6 can be simultaneously driven by means of one upper linear motion element 41, thus simplifying the design structure of the power unit, facilitating manufacturing implementation, and ensuring the accuracy of the synchronous displacement motion of the conductive electrode part 5 and the welding electrode part 6.

[0036] For the consideration of simultaneously limiting the extreme position of the downward movement of the conductive electrode part 5 and the welding electrode part 6 to ensure good pressing against the welded part, as Figure 5 , 7As shown in the figure, the power unit 4 may also be provided with a limit component 47 according to the actual situation. The limit component 47 is fixed to the base plate 1 and is arranged directly to the right of the third slide rail slider assembly 44. The limit component 47 includes a load-bearing plate 471, a limit bolt 472, and a hydraulic buffer 473. The limit bolt 472 and the hydraulic buffer 473 are inserted side by side into the load-bearing plate 471 and are both positioned opposite to the sliding block 42. In this way, when it is necessary to adjust the extreme downward movement positions of the conductive electrode part 5 and the welding electrode part 6, it is only necessary to correspondingly rotate the limit bolt 472 and adjust the working stroke of the hydraulic buffer 473, which is convenient and fast.

[0037] Here, it should be noted that the above-mentioned left linear motion element 71, right linear motion element 82, and upper linear motion element 41 can all be preferably selected as cylinders, hydraulic cylinders, or linear motors according to different actual application scenarios.

[0038] As can be seen from Figure 1 , Figure 5 the figure, the right mounting plate 3 can be detachably fixed to the base plate 1. The resistance welding equipment can also be provided with a fourth slide rail slider assembly 10 and a quick elbow clamp 11 according to actual needs. The fourth slide rail slider assembly 10 is arranged between the base plate 1 and the left mounting plate 2. The quick elbow clamp 11 is fixed to the base plate 1 and is arranged on the left side of the left mounting plate 2 to drag the left mounting plate 2 to perform a sliding movement along the left-right direction. In this way, when the entire circumferential side walls of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 have been fully used and need to be replaced as a whole, it is only necessary to first loosen the connection between the conductive electrode part 5 and the bearing seat 46, and then pull the quick elbow clamp 11 to drag the left mounting plate 2 to slide to the left until there is a sufficient distance between the conductive electrode part 5 and the welding electrode part 6. The entire operation process saves time and effort and has high safety.

[0039] Finally, it should be noted that in addition to being able to use the above-mentioned quick elbow clamp 11 to directionally drag the left mounting plate 2, other push-pull members such as screws, cylinders, or hydraulic cylinders can also be selected according to different actual application scenarios.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A resistance welding device, characterized in that, it includes a substrate, a left mounting plate, a right mounting plate, a power unit, a conductive electrode unit, a welding electrode unit, a conductive electrode rotation driving unit, and a welding electrode rotation driving unit; the left mounting plate and the right mounting plate are both arranged in parallel in front of the substrate and are arranged side by side; the conductive electrode unit is arranged in parallel in front of the left mounting plate and includes a disc-shaped conductive electrode and a left clamping unit; when the left clamping unit acts, the disc-shaped conductive electrode is switched between a free rotation state and a locked state; the welding electrode unit is arranged in parallel in front of the right mounting plate and is arranged opposite to the conductive electrode unit, and includes a disc-shaped welding electrode and a right clamping unit; when the right clamping unit acts, the disc-shaped welding electrode is switched between a free rotation state and a locked state; the power unit is fixed to the substrate to simultaneously drive the conductive electrode unit and the welding electrode unit to perform displacement movement synchronously in the up and down direction; the conductive electrode rotation driving unit is fixed to the left mounting plate and is arranged on the left side of the conductive electrode unit; the welding electrode rotation driving unit is fixed to the right mounting plate and is arranged on the left side of the welding electrode unit; the power unit acts to drag the conductive electrode unit to move upward in displacement until the disc-shaped conductive electrode is aligned with the conductive electrode rotation driving unit, and at the same time, drag the welding electrode unit to move upward in displacement until the disc-shaped welding electrode is aligned with the welding electrode rotation driving unit; the conductive electrode rotation driving unit and the welding electrode rotation driving unit act to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to rotate by a set angle around their respective central axes.

2. The resistance welding device according to claim 1, characterized in that, the conductive electrode rotation driving unit includes a left linear motion element, a left rack, a left gear, a left bearing seat, a first slide block assembly, and a left transmission shaft; the left bearing seat is arranged in front of the left mounting plate and follows the conductive electrode unit to perform synchronous displacement movement under the action of the first slide block assembly; the left transmission shaft passes through the left bearing seat, and its right end is directly fixed to the disc-shaped conductive electrode as a whole; the left linear motion element is detachably fixed to the left mounting plate to drive the left rack to perform reciprocating displacement in the front and back direction; the left gear adapted to the left rack is sleeved on the left transmission shaft to drive the left transmission shaft to perform synchronous rotation movement with it.

3. The resistance welding device according to claim 2, characterized in that, The welding electrode rotation driving part includes a right linear motion element, a right rack, a right gear, a right bearing seat, a second slide rail slider assembly, and a right transmission shaft; the right bearing seat is arranged directly in front of the right mounting plate and follows the welding electrode part to perform synchronous displacement motion under the action of the second slide rail slider assembly; the right transmission shaft passes through the right bearing seat, and its left end is directly fixed integrally with the disc-shaped welding electrode; the right linear motion element is detachably fixed on the right mounting plate to drive the right rack to perform reciprocating displacement along the front-back direction. The right gear adapted to the right rack is sleeved on the right transmission shaft to drive the right transmission shaft to perform synchronous rotation motion therewith.

4. The resistance welding equipment according to claim 3, characterized in that it further includes a contact displacement sensor; the contact displacement sensor is fixed on the substrate and is arranged directly opposite to the right bearing seat.

5. The resistance welding equipment according to claim 3, characterized in that both the left linear motion element and the right linear motion element are any one of a cylinder, a hydraulic cylinder, and a linear motor.

6. The resistance welding equipment according to any one of claims 1-5, characterized in that the power part includes an upper linear motion element, a sliding block, a guide plate, a third slide rail slider assembly, a roller assembly, and a bearing seat; the upper linear motion element is detachably fixed on the substrate and, under the combined action of the third slide rail slider assembly, drags the sliding block to perform displacement motion along the left-right direction; the guide plate is detachably fixed on the front side wall of the sliding block, and a guide groove adapted to the roller assembly is formed thereon; the roller assembly is inserted on the bearing seat and is fixed to both the conductive electrode part and the welding electrode part as a whole; when the upper linear motion element acts, the roller assembly always performs displacement motion along the guide groove to simultaneously pull up / push down the conductive electrode part and the welding electrode part.

7. The resistance welding equipment according to claim 6, characterized in that the power part further includes a limiting component; the limiting component is fixed to the substrate and is arranged directly on the right side of the third slide rail slider assembly; the limiting component includes a bearing plate, a limiting bolt, and a hydraulic buffer; the limiting bolt and the hydraulic buffer are inserted side by side on the bearing plate and are both arranged opposite to the sliding block.

8. The resistance welding equipment according to claim 6, characterized in that the upper linear motion element is any one of a cylinder, a hydraulic cylinder, and a linear motor.

9. The resistance welding equipment according to any one of claims 1-5, characterized in that The right mounting plate is detachably fixed to the substrate; the resistance welding device further includes a fourth slide rail slider assembly and a pushing and pulling member; the fourth slide rail slider assembly is arranged between the substrate and the left mounting plate; the pushing and pulling member is fixed to the substrate and arranged on the left side of the left mounting plate to drag the left mounting plate to slide along the left-right direction.

10. The resistance welding device according to claim 9, wherein, the pushing and pulling member is a quick-action toggle clamp.

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