CN112589245A

CN112589245A - Resistance welding equipment

Info

Publication number: CN112589245A
Application number: CN202011531753.7A
Authority: CN
Inventors: 丁修凡
Original assignee: Nonstandard Automation Technology Co ltd
Current assignee: Nonstandard Automation Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-04-02

Abstract

The invention relates to resistance welding equipment which comprises a substrate, a left mounting plate, a right mounting plate, a power part, a conductive electrode part, a welding electrode part, a conductive electrode rotation driving part and a welding electrode rotation driving part. The left mounting plate and the right mounting plate are uniformly arranged right in front of the base plate. The conductive electrode part is arranged right in front of the left mounting plate and comprises a disc-shaped conductive electrode and a left clamping unit. The welding electrode part is arranged right in front of the right mounting plate and is opposite to the conductive electrode part, and comprises a disc-shaped welding electrode and a right clamping unit. The power part acts to drag the conductive electrode part and the welding electrode part to move upwards until the conductive electrode part and the welding electrode part are respectively opposite to the conductive electrode rotation driving part and the welding electrode rotation driving part. The conductive electrode rotation driving part and the welding electrode rotation driving part act to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to respectively rotate in the circumferential direction by a preset angle.

Description

Resistance welding equipment

Technical Field

The invention relates to the technical field of resistance welding, in particular to resistance welding equipment.

Background

With the development of aerospace, electronics, automobiles, household appliances and other industries, resistance welding is gaining more and more attention. Resistance welding uses the effect of electrical resistance heating produced by current flowing through the contact surfaces and adjacent areas of the workpieces to heat them to a molten or plastic state to form a metallic bond. In the case of spot welding, for example, a welding material is assembled into a lap joint and pressed between a conductive electrode and a welding electrode, and a base metal is melted by resistance heat to form a welding spot. In the prior art, the conductive electrode and the welding electrode are both columnar electrodes, and the lower end face of the columnar electrode is used for realizing the compression and subsequent electrifying hot melting welding of a welding piece. However, after a period of use, practical examination shows that a large amount of pitting corrosion or even pits exist on the lower end surfaces of the conductive electrode and the welding electrode, which causes serious adverse effects on the final welding quality of the weldment, mainly manifested by poor compactness and regularity of the formed weld joint, and further causes the reduction of the welding connection strength of the weldment. Thus, a skilled person is urgently needed to solve the above problems.

Disclosure of Invention

Therefore, in view of the above-mentioned problems and drawbacks, the present inventors have collected relevant information, evaluated and considered in many ways, and made continuous experiments and modifications by technicians engaged in the industry through years of research and development experience, which finally resulted in the appearance of the electric resistance welding equipment.

In order to solve the above technical problem, the present invention relates to an electric resistance welding apparatus including a substrate, a left mounting plate, a right mounting plate, a power section, a conductive electrode section, a welding electrode section, a conductive electrode rotation driving section, and a welding electrode rotation driving section. The left mounting plate and the right mounting plate are arranged in parallel right in front of the base plate and are arranged side by side. The conductive electrode part is arranged in parallel right in front of the left mounting plate and comprises 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 part is arranged in parallel right in front of the right mounting plate and is opposite to the conductive electrode part, and comprises a disc-shaped welding electrode and a right clamping unit. When the right clamping unit acts, the disk-shaped welding electrode is switched between a free rotation state and a locked state. The power part is fixed with the substrate and is used for simultaneously driving the conductive electrode part and the welding electrode part to synchronously perform displacement motion along the up-down direction. The conductive electrode rotation driving part is fixed on the left mounting plate and is arranged on the left side of the conductive electrode part. The welding electrode rotation driving part is fixed on the right mounting plate and arranged on the left side of the welding electrode part. The power part acts to drag the conductive electrode part to move upwards until the disc-shaped conductive electrode and the conductive electrode rotation driving part are in relative position, and meanwhile, the welding electrode part is dragged to move upwards until the disc-shaped welding electrode and the welding electrode rotation driving part are in relative position. The conductive electrode rotation driving part and the welding electrode rotation driving part act to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to rotate around the central axes of the disc-shaped conductive electrode and the disc-shaped welding electrode respectively by a set angle.

As a further improvement of the technical scheme of the invention, the conductive electrode rotary driving part comprises a left linear motion element, a left rack, a left gear, a left bearing seat, a first sliding rail and sliding block assembly and a left transmission shaft. The left bearing seat is arranged right in front of the left mounting plate and is assisted with the first sliding rail and sliding block component to move synchronously in a displacement mode along with the conductive electrode part. The left transmission shaft penetrates through the left bearing seat, and the right end part of the left transmission shaft is directly fixed with the disc-shaped conductive electrode into a whole. The left linear motion element is detachably fixed on the left mounting plate and is used for driving the left rack to perform reciprocating displacement along the front-back direction. The left gear matched with the left rack is sleeved on the left transmission shaft to drive the left transmission shaft to rotate synchronously along with the left gear.

Similar to the conductive electrode rotation driving part, 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 and a right transmission shaft. The right bearing seat is arranged right in front of the right mounting plate and is assisted with the second sliding rail and sliding block component to perform synchronous displacement motion along with the welding electrode part. The right transmission shaft transversely penetrates through the right bearing seat, and the left end part of the right transmission shaft is directly fixed with the disc-shaped welding electrode into a whole. The right linear motion element is detachably fixed on the right mounting plate and is used for driving the right rack to perform reciprocating displacement along the front-back direction. The right gear matched with the right rack is sleeved on the right transmission shaft to drive the right transmission shaft to rotate synchronously along with the right gear.

As a further improvement of the technical scheme of the invention, the resistance welding equipment also comprises a contact type displacement sensor. The contact type displacement sensor is fixed on the substrate and is arranged right opposite to the right bearing seat.

As a further improvement of the technical scheme of the invention, the left linear motion element and the right linear motion element are preferably any one of an air cylinder, a hydraulic cylinder and a linear motor.

As a further improvement of the technical scheme of the invention, the power part comprises an upper linear motion element, a sliding block, a guide plate, a third sliding rail and sliding block assembly, a roller assembly and a bearing seat. The upper linear motion element is detachably fixed on the base plate, and the combined action of the third sliding rail and sliding block assembly is used for dragging the sliding block to move along the left and right directions. The guide plate is detachably fixed on the front side wall of the sliding block and is provided with a guide groove matched with the roller assembly. The roller components are inserted on the force bearing seat and are simultaneously fixed with the conductive electrode part and the welding electrode part as a whole. When the upper linear motion element acts, the roller assembly always moves along the guide groove in a displacement manner so as to pull up/push down the conductive electrode part and the welding electrode part simultaneously.

As a further improvement of the technical scheme of the invention, the power part also comprises a limiting component. The limiting assembly is fixed with the base plate and arranged right and right of the third sliding rail and sliding block assembly. The limiting component comprises a bearing plate, a limiting bolt and a hydraulic buffer. The limit bolt and the hydraulic buffer are inserted on the bearing plate side by side and are opposite to the sliding block.

As a further improvement of the technical solution of the present invention, the upper linear motion element is preferably any one of a cylinder, a hydraulic cylinder and a linear motor.

As a further improvement of the technical scheme of the invention, the right mounting plate can be detachably fixed with the base plate. The resistance welding equipment also comprises a fourth sliding rail sliding block component and a push-pull piece. The fourth slide rail sliding block component is arranged between the base plate and the left mounting plate. The push-and-pull piece is fixed on the base plate and arranged on the left side of the left mounting plate so as to drag the left mounting plate to perform sliding motion along the left-and-right direction.

As a further improvement of the technical scheme of the invention, the push-pull piece is preferably a quick elbow clip.

Compared with the resistance welding equipment with the traditional design structure, in the technical scheme disclosed by the invention, the conductive electrode rotation driving part and the welding electrode rotation driving part are additionally arranged and are respectively matched with the disc-shaped conductive electrode and the disc-shaped welding electrode for use. After the resistance welding equipment is 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 the central axis of the disc-shaped conductive electrode and the disc-shaped welding electrode; and then, 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 for a set angle, so that the damaged working surfaces on the disc-shaped conductive electrode and the disc-shaped welding electrode are staggered for a certain angle relative to the circumferential direction of the weldment, and new undamaged working surfaces on the disc-shaped conductive electrode and the disc-shaped welding electrode participate in the welding process of welding. Therefore, the welding quality of the resistance welding equipment is effectively guaranteed, namely the compactness and the forming regularity of a formed welding line are guaranteed, and the welded piece is guaranteed to have good bonding strength after being welded.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of one aspect of the resistance welding apparatus of the present invention.

Fig. 2 is a perspective view of another perspective of the resistance welding apparatus of the present invention.

Fig. 3 is an enlarged view of a portion I of fig. 1.

Fig. 4 is a partial enlarged view II of fig. 2.

Fig. 5 is a front view of fig. 1.

Fig. 6 is a sectional view a-a of fig. 5.

Fig. 7 is a partially enlarged view III of fig. 5.

Fig. 8 is a sectional view B-B of fig. 5.

Fig. 9 is a perspective view of a disc-shaped conductive electrode in the resistance welding apparatus of the present invention.

Fig. 10 is a perspective view of a disc-shaped welding electrode in the resistance welding apparatus of the present invention.

FIG. 11 is a perspective view of the left clamping unit of the resistance welding apparatus of the present invention.

FIG. 12 is a perspective view of the right clinching unit in the resistance welding apparatus of the present invention.

1-a substrate; 2-left mounting plate; 3, placing a mounting plate at the right; 4-a power section; 41-upper linear motion element; 42-a sliding block; 43-a guide plate; 431-a guide groove; 44-a third slide rail slider assembly; 45-a roller assembly; 46-bearing seat; 47-a stop assembly; 471-bearing plate; 472-limit bolt; 473-hydraulic buffer; 5-a conductive electrode portion; 51-disk-shaped conductive electrodes; 52-left clamping unit; 6-welding the electrode part; 61-disc-shaped welding electrodes; 62-right clamping unit; 7-conductive electrode rotation drive section; 71-left disposed linear motion element; 72-left rack; 73-left gear; 74-left bearing seat; 75-a first sliding rail slider assembly; 76-left drive shaft; 8-welding electrode rotation driving part; 81-right-hand linear motion element; 82-right rack; 83-right gear; 84-right bearing seat; 85-a second sliding rail sliding block component; 86-right transmission shaft; 9-a contact displacement sensor; 10-a fourth sliding rail slider assembly; 11-quick elbow clip.

Detailed Description

In the description of the present invention, it is to be understood that the terms "left", "right", "upper", "lower", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

To facilitate those skilled in the art to fully understand the technical solutions disclosed in the present invention, the following will explain the present invention in detail with reference to specific embodiments, and fig. 1 and fig. 2 respectively show schematic perspective views of two different viewing angles of the resistance welding apparatus of the present invention, and it can be seen that the apparatus mainly comprises a substrate 1, a left mounting plate 2, a right mounting plate 3, a power unit 4, a conductive electrode unit 5, a welding electrode unit 6, a conductive electrode rotation driving unit 7, a welding electrode rotation driving unit 8, and so on. The left mounting plate 2 and the right mounting plate 3 are arranged in parallel right in front of the substrate 1, are arranged side by side, and are spaced from each other by a set distance. As shown in fig. 5, the conductive electrode section 5 is arranged in parallel just in front of the left mount board 2, and it includes a disk-shaped conductive electrode 51 (as shown in fig. 9) and a left clamp unit 52 (as shown in fig. 11). When the left clamping unit 52 is actuated, the disk-shaped conductive electrode 51 is switched between a freely rotating state and a locked state. The welding electrode portion 6 is arranged in parallel just in front of the right mounting plate 3 and opposed to the conductive electrode portion 5, and includes a disk-shaped welding electrode 61 (shown in fig. 8 and 10) opposed to the right clamping unit 62 and the right clamping unit 62 (shown in fig. 12). When the right clamping unit 62 is operated, the disk-shaped welding electrode 61 is switched between a freely rotating state and a locked state. Since the design of the left clamping unit 52 and the right clamping unit 62 is well-known in the art, they will not be described in detail herein. The power unit 4 is fixed to the substrate 1 for simultaneously driving the conductive electrode portion 5 and the bonding electrode portion 6 to perform a displacement motion in synchronization with each other in the up-down direction. The conductive electrode rotation driving portion 7 is fixed to the left mounting plate 2 and is disposed on the left side of the conductive electrode portion 5. The welding electrode rotation driving portion 8 is fixed to the right mounting plate 3 and is disposed on the left side of the welding electrode portion 6. The power part 4 acts to drag the conductive electrode part 5 to move upwards until the disc-shaped conductive electrode 51 is completely opposite to the conductive electrode rotation driving part 7, and at the same time, drag the welding electrode part 6 to move upwards until the disc-shaped welding electrode 61 is completely opposite to the welding electrode rotation driving part 8. The conductive electrode rotation driving part 7 and the welding electrode rotation driving part 8 operate to drive the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 to rotate around their respective central axes by a set angle. Therefore, the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 can be rotated in real time according to the actual damaged condition of the welding working face, so that a new working face participates in the welding operation, the welding quality of the electric resistance welding equipment is effectively ensured, the compactness and the forming regularity of a formed weld joint are ensured, and a welded part has good bonding strength after being welded.

The working principle of the resistance welding equipment is as follows: after the resistance welding equipment is applied for a period of time, when the working surfaces of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 are damaged, the left clamping unit 52 and the right clamping unit 62 act to respectively loosen the clamping of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61, so that the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 can freely rotate around the central axis of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61; subsequently, the conductive electrode rotation driving part 7 and the welding electrode rotation driving part 8 act to respectively drive the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 to rotate by a set angle, so that the damaged working surfaces of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 are staggered by a certain angle relative to the circumferential direction of the weldment, and new undamaged working surfaces of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 participate in the welding process of welding.

As is known, the conductive electrode rotation driving part 7 may adopt various design structures to realize the rotation driving of the disc-shaped conductive electrode 51, however, an embodiment with simple structural design, easy manufacturing implementation, and easy maintenance and repair at the later stage is recommended here, specifically as follows: as shown in fig. 3, 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 sliding rail block assembly 75 and a left transmission shaft 76. The left bearing seat 74 is arranged right in front of the left mounting plate 2 and is assisted by the first slide rail slider assembly 75 to move synchronously in a displacement manner along with the conductive electrode part 5. The left transmission shaft 76 passes through the left bearing seat 74, and the right end of the left transmission shaft is directly fixed 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 in the front-rear direction. The left gear 73 matched with the left rack 72 is sleeved on the left transmission shaft 76 to drive the left transmission shaft 76 to rotate synchronously along with the left gear. In addition, it should be noted that the rack and pinion driving has the advantages of high operation speed, smooth operation, high transmission precision, accurate transmission ratio and high transmission efficiency, thereby facilitating the realization of accurate driving of the rotation motion of the disc-shaped conductive electrode 51.

For the same design purpose, the welding electrode rotation driving portion 8 may also be designed by referring to the conductive electrode rotation driving portion 7, which is as follows: as shown in fig. 4, 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 sliding rail slider assembly 85 and a right transmission shaft 86. The right bearing seat 84 is arranged right in front of the right mounting plate 3 and is assisted by the second slide rail slider assembly 85 to perform synchronous displacement motion along with the welding electrode part 6. The right transmission shaft 86 passes through the right bearing seat 84, and the left end of the right transmission shaft is directly fixed with the disk-shaped welding electrode 61 into a whole. The right linear motion element 81 is detachably fixed to the right mounting plate 3 to drive the right rack 82 to reciprocate in the front-rear 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 rotate synchronously therewith.

As can be seen from fig. 2 and 5, a contact type displacement sensor 9 is additionally provided in the resistance welding apparatus. The contact type displacement sensor 9 is detachably fixed to the base plate 1 and is disposed to face the right-hand bearing housing 84 described above. When the power unit 4 acts to drag the conductive electrode unit 5 and the welding electrode unit 6 to perform synchronous displacement motion upwards, the real-time displacement of the conductive electrode unit 5 and the welding electrode unit 6 can be detected in real time by the contact displacement sensor 9, so as to ensure the accuracy of the alignment of the left gear 73 and the right gear 83 with the left rack 72 and the right rack 82, and further ensure the smoothness and the accuracy of the rotation driving of the left linear motion element 71 and the right linear motion element 81 to the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61, respectively.

As shown in fig. 5 and 6, as a further refinement of the structure of the electric resistance welding apparatus, the power unit 4 preferably includes an upper linear motion element 41, a slide block 42, a guide plate 43, a third slide rail slider assembly 44, a roller assembly 45, and a force bearing seat 46. The upper linear motion element 41 is detachably fixed on the base plate 1, and is assisted by the cooperation of the third sliding rail block assembly 44 to drag the sliding block 42 to perform displacement motion 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 matched with the roller assembly 45 is formed on the guide plate. The roller assembly 45 is inserted on the force bearing seat 46 and is fixed with the conductive electrode part 5 and the welding electrode part 6 as a whole. When the upper linearly-moving member 41 is actuated, the roller assembly 45 always performs a displacement motion along the guide groove 431 to simultaneously pull up/push down the conductive electrode part 5 and the welding electrode part 6. Through adopting above-mentioned technical scheme to set up, can realize driving simultaneously conductive electrode portion 5 and welding electrode portion 6 with the help of a overhead linear motion component 41 to simplified the design structure of power portion, do benefit to the manufacturing and implement, and ensured conductive electrode portion 5 and welding electrode portion 6 and carried out the precision of synchronous displacement motion.

In view of simultaneously defining the extreme positions of the downward movement of the conductive electrode part 5 and the welding electrode part 6 to ensure good pressing against the welding member, as shown in fig. 5 and 7, the power part 4 may be additionally provided with a limit component 47 according to practical situations. The limiting component 47 is fixed with the base plate 1 and arranged right to the third sliding rail sliding block component 44. The limit assembly 47 includes a 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 on the force bearing plate 471 and are both opposite to the sliding block 42. Therefore, when the limit positions of the downward movement of the conductive electrode part 5 and the welding electrode part 6 need to be adjusted, the limit bolt 472 and the working stroke of the hydraulic buffer 473 need to be adjusted correspondingly, which is convenient and fast.

It should be noted that, the left linear motion element 71, the right linear motion element 82, and the upper linear motion element 41 may be preferably an air cylinder, a hydraulic cylinder, or a linear motor according to different application scenarios.

As can also be seen from fig. 1 and 5, the right mounting plate 3 is detachably fixed to the base plate 1. And the resistance welding equipment can be additionally provided with a fourth sliding rail sliding block component 10 and a quick elbow clamp 11 according to actual needs. The fourth sliding rail slider assembly 10 is arranged between the base plate 1 and the left mounting plate 2. The fast elbow clip 11 is fixed on the base plate 1 and arranged on the left side of the left mounting plate 2 to drag the left mounting plate 2 to perform sliding motion along the left-right direction. Therefore, when the whole peripheral side walls of the disc-shaped conductive electrode 51 and the disc-shaped welding electrode 61 are completely applied and the whole operation needs to be replaced, the connection between the conductive electrode part 5 and the force bearing seat 46 is firstly loosened, and then the quick elbow clamp 11 is pulled to drag the left mounting plate 2 to slide leftwards until the conductive electrode part 5 and the welding electrode part 6 are separated by a sufficient distance, so that the whole operation process is time-saving and labor-saving, and has high safety.

Finally, it should be noted that, in addition to the above-mentioned rapid elbow clamp 11 being used for directionally dragging the left mounting plate 2, other pushing and pulling members such as a screw, an air cylinder or a hydraulic cylinder may be selected according to different practical application scenarios.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A resistance welding device is characterized by comprising a substrate, a left mounting plate, a right mounting plate, a power part, a conductive electrode part, a welding electrode part, a conductive electrode rotation driving part and a welding electrode rotation driving part; the left mounting plate and the right mounting plate are arranged in parallel right in front of the substrate and are arranged side by side; the conductive electrode part is arranged in parallel right in front of the left mounting plate and comprises 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 part is arranged in parallel right in front of the right mounting plate, is opposite to the conductive electrode part and comprises 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 part is fixed with the substrate and is used for simultaneously driving the conductive electrode part and the welding electrode part to synchronously perform displacement motion along the vertical direction; the conductive electrode rotation driving part is fixed on the left mounting plate and is arranged on the left side of the conductive electrode part; the welding electrode rotation driving part is fixed on the right mounting plate and is arranged on the left side of the welding electrode part; the power part acts to drag the conductive electrode part to move upwards until the disc-shaped conductive electrode and the conductive electrode rotation driving part are in relative position, and meanwhile, the welding electrode part is dragged to move upwards until the disc-shaped welding electrode and the welding electrode rotation driving part are in relative position; the conductive electrode rotation driving part and the welding electrode rotation driving part act to drive the disc-shaped conductive electrode and the disc-shaped welding electrode to rotate around the central axes of the disc-shaped conductive electrode and the disc-shaped welding electrode respectively by a set angle.

2. An electric resistance welding device according to claim 1, wherein the conductive electrode rotary driving part comprises a left linear motion element, a left rack, a left gear, a left bearing seat, a first sliding rail and sliding block assembly and a left transmission shaft; the left bearing seat is arranged right in front of the left mounting plate and is assisted with the first sliding rail and sliding block component to move synchronously in a displacement manner along with the conductive electrode part; the left transmission shaft penetrates through the left bearing seat, and the right end part of the left transmission shaft is directly fixed with the disc-shaped conductive electrode into a whole; the left linear motion element is detachably fixed on the left mounting plate and is used for driving the left rack to perform reciprocating displacement along the front-back direction; the left gear matched with the left rack is sleeved on the left transmission shaft to drive the left transmission shaft to rotate synchronously along with the left transmission shaft.

3. An electric resistance welding apparatus according to claim 2, wherein said welding electrode rotary drive portion 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 right in front of the right mounting plate and is assisted with the second slide rail sliding block component to perform synchronous displacement motion along with the welding electrode part; the right transmission shaft penetrates through the right bearing seat, and the left end part of the right transmission shaft is directly fixed with the disc-shaped welding electrode into a whole; the right linear motion element is detachably fixed on the right mounting plate and is used for driving the right rack to perform reciprocating displacement along the front-back direction; and the right gear matched with the right rack is sleeved on the right transmission shaft to drive the right transmission shaft to perform synchronous rotary motion along with the right transmission shaft.

4. A resistance welding apparatus according to claim 3, further comprising a contact displacement sensor; the contact type displacement sensor is fixed on the substrate and is arranged right opposite to the right bearing seat.

5. The electric resistance welding apparatus according to claim 3, wherein the left-located linear motion element and the right-located linear motion element are each any one of a cylinder, a hydraulic cylinder, and a linear motor.

6. An electric resistance welding device as set forth in any one of claims 1-5, characterized in that said power part comprises 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 base plate, and the third sliding rail and sliding block assembly is assisted to drag the sliding block to perform displacement motion along the left and right directions; the guide plate is detachably fixed on the front side wall of the sliding block and is provided with a guide groove matched with the roller assembly; the roller wheel assembly is inserted on the force bearing seat and is fixed with the conductive electrode part and the welding electrode part simultaneously as a whole; when the upper linear motion element acts, the roller assembly always performs displacement motion along the guide groove so as to simultaneously pull up/push down the conductive electrode part and the welding electrode part.

7. A resistance welding apparatus according to claim 6, wherein said power section further includes a limit assembly; the limiting assembly is fixed with the base plate and is arranged right to the third sliding rail sliding block assembly; the limiting assembly comprises a bearing plate, a limiting bolt and a hydraulic buffer; the limiting bolt and the hydraulic buffer are inserted in the bearing plate side by side and are opposite to the sliding block.

8. A resistance welding apparatus according to claim 6, wherein said upper linear motion member is any one of a cylinder, a hydraulic cylinder and a linear motor.

9. A resistance welding apparatus according to any one of claims 1 to 5, wherein the right mounting plate is detachably fixed to the base plate; the resistance welding equipment also comprises a fourth sliding rail sliding block component and a push-pull piece; the fourth sliding rail sliding block component is arranged between the base plate and the left mounting plate; the push-pull piece is fixed on the base plate and arranged on the left side of the left mounting plate so as to drag the left mounting plate to perform sliding motion along the left-right direction.

10. A resistance welding apparatus according to claim 9, wherein the push-pull member is a quick toggle clamp.