Resistance welding system and method

Abstract

The present invention relates to the field of welding technology, and in particular, to a resistance welding system and method. The resistance welding system includes a welding machine assembly, a workpiece assembly, a first pole assembly, and a second pole assembly. The welding machine assembly includes a main machine and a workbench. The workpiece assembly includes a welding plate unit, a first nut, and a second nut. The welding plate unit includes a plate body, a first hole, and a second hole. The first pole assembly includes a first pole unit, a positioning unit, a support unit, and a first drive unit. The positioning unit includes a first positioning module, a second positioning module, and a third positioning module. The second pole assembly includes a second pole body and a second drive unit. The resistance welding system also includes a positioning state, a first welding state, and a second welding state. In this way, the problem of low welding efficiency of various types of nuts and thin plates is solved.

Description

Technical Field

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

[0002] To connect a component to a thin plate, you can punch a hole in the thin plate and weld a nut on the thin plate. The bolt passes through the component and the light hole on the thin plate in turn, and is threadedly connected with the nut, thereby firmly fixing the component to the thin plate. In order to ensure that there is a large locking force between the bolt and the nut, the front end of the bolt needs to extend and pass through the hole in the thin plate, so that the thread of the nut is completely connected with the thread of the bolt, thereby increasing the locking force. Resistance welding is usually used to weld thin plates and nuts. Even if the workpieces are under a certain electrode pressure, the resistance heat generated when the current passes through the workpieces is used to melt the contact surface between the two workpieces to achieve the welding method of connection.

[0003] In order to allow the bolt to pass through the hole in the thin plate smoothly, it is usually necessary to use a positioning tool to align the hole in the thin plate with the threaded hole of the nut, that is, the central axis of the hole in the thin plate coincides with the axis of the threaded hole. However, when at least two sizes of nuts need to be welded on the thin plate, and these nuts of different sizes need to be welded in different positions, the positioning tool of the nut needs to be switched back and forth, and the processing efficiency is low. Summary of the invention

[0004] In order to solve the problem of low welding efficiency between nuts of various models and thin plates, the present invention provides a resistance welding system and method.

[0005] In a first aspect, the present invention provides a resistance welding system, the resistance welding system comprising:

[0006] A welding machine assembly, the welding machine assembly comprising a main machine and a workbench; the main machine and the workbench are detachably connected;

[0007] A workpiece assembly, the workpiece assembly comprising a welding plate unit, a first nut, and a second nut; the welding plate unit comprises a plate body, a first hole, and a second hole; the first hole and the second hole are arranged at intervals;

[0008] A first pole assembly, the first pole assembly comprises a first pole unit, a positioning unit, a supporting unit, and a first driving unit; the first driving unit is detachably connected to the workbench; the first driving unit drives the first pole unit to move; the first pole unit is arranged to be hollow; the positioning unit comprises a first positioning module, a second positioning module, and a third positioning module; the first positioning module and the second positioning module are arranged to be tubular; the inner peripheral wall of the second positioning module abuts against the outer peripheral wall of the third positioning module; the outer peripheral wall of the second positioning module abuts against the inner peripheral wall of the first positioning module; the outer peripheral wall of the first positioning module abuts against the inner wall of the hollow cavity of the first pole unit; at least one end of the first positioning module, one end of the third positioning module, and the hollow cavity of the first pole unit surround to form a supporting chamber; the supporting chamber is communicated with the supporting unit; the first pole unit is electrically connected to the host;

[0009] A second pole assembly, the second pole assembly comprising a second pole body and a second driving unit; the second driving unit drives the second pole body to move; the second driving unit is detachably connected to the workbench; the second pole body is electrically connected to the host;

[0010] The resistance welding system also includes a positioning state, a first welding state, and a second welding state; the positioning state includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the first positioning module and the first pole unit to abut against each other in the axial direction of the first positioning module and remain stationary; the first welding state includes when the support unit supplies fluid to the support chamber, the second pole body pushes the first nut sleeved on the third positioning module, so that the first nut abuts against the plate body on the side of the first hole, and the plate body abuts against the first pole unit; the first pole unit is electrically connected to the second pole body through the plate body and the first nut in turn; the second welding state includes when the support unit supplies fluid to the support chamber, the second pole body pushes the second nut sleeved on the second positioning module, so that the second nut abuts against the plate body on the side of the second hole, and the plate body abuts against the first pole unit; the first pole unit is electrically connected to the second pole body through the plate body and the second nut in turn.

[0011] In some embodiments, the first pole unit includes a first pole body, a first positioning hole, a second positioning hole, and a third positioning hole; the first positioning hole, the second positioning hole, and the third positioning hole are sequentially connected along the axial direction of the first positioning hole, and penetrate from one side of the first pole body to the other side; the inner diameter of the second positioning hole gradually decreases along the direction from the third positioning hole to the first positioning hole; at least one end of the first positioning module, one end of the third positioning module, and the third positioning hole surround and form a supporting chamber; the first pole body is electrically connected to the host;

[0012] The positioning state also includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the first positioning module to abut the first positioning hole, the second positioning hole, and the third positioning hole in the axial direction of the first positioning hole and remain stationary; the first welding state also includes when the support unit supplies fluid to the support chamber, the plate body abuts against the first pole body; the first pole body is electrically connected to the second pole body through the plate body and the first nut in turn.

[0013] In some embodiments, the first positioning module includes a first positioning ring, a second positioning ring, a third positioning ring, and a fourth positioning ring; the first positioning ring, the second positioning ring, the third positioning ring, and the fourth positioning ring are fixedly connected in sequence along the axial direction of the first positioning ring; the outer diameter of the first positioning ring gradually increases from the first positioning ring to the third positioning ring; the inner diameter of the third positioning ring gradually increases from the first positioning ring to the third positioning ring; the outer diameter of the third positioning ring gradually increases from the first positioning ring to the third positioning ring; the outer peripheral wall of the second positioning ring, the outer peripheral wall of the third positioning ring, and the outer peripheral wall of the fourth positioning ring are respectively abutted against the inner wall of the hollow cavity of the first pole unit;

[0014] The positioning state also includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the fourth positioning ring, so that the second positioning ring, the third positioning ring, and the fourth positioning ring are respectively in contact with the first pole unit in the axial direction of the second positioning ring and remain stationary.

[0015] In some embodiments, the second positioning module includes a fifth positioning ring, a sixth positioning ring, a seventh positioning ring, and an eighth positioning ring; the fifth positioning ring, the sixth positioning ring, the seventh positioning ring, and the eighth positioning ring are fixedly connected in sequence along the axial direction of the fifth positioning ring; the outer diameter of the fifth positioning ring gradually increases from the fifth positioning ring to the seventh positioning ring; the outer diameter of the seventh positioning ring gradually increases from the fifth positioning ring to the seventh positioning ring; the outer peripheral walls of parts of the sixth positioning ring, the seventh positioning ring, and the eighth positioning ring are respectively abutted against the inner peripheral wall of the first positioning module;

[0016] The second welding state also includes the second pole body pushing the second nut sleeved on the sixth positioning ring.

[0017] In some embodiments, the third positioning module includes a first positioning column, a second positioning column, a third positioning column, a fourth positioning column, and a fifth positioning column; the first positioning column, the second positioning column, the third positioning column, the fourth positioning column, and the fifth positioning column are fixedly connected in sequence along the axial direction of the first positioning column; the outer diameter of the first positioning column gradually increases from the first positioning column to the fourth positioning column; the outer peripheral wall of the second positioning column abuts against the inner peripheral wall of the second positioning module; the diameter of the third positioning column is larger than the inner diameter of the second positioning module and smaller than the outer diameter of the second positioning module; the outer peripheral wall of the fourth positioning column abuts against the inner wall of the hollow cavity of the first pole unit; the fifth positioning column is spaced apart from the inner wall of the hollow cavity of the first pole unit;

[0018] The positioning state also includes the support unit supplying fluid to the support chamber, driving the fourth positioning column to push the first positioning module and the first pole unit to abut and remain stationary in the axial direction of the first positioning module; the first welding state also includes when the support unit supplies fluid to the support chamber, the second pole body pushes the first nut sleeved on the first positioning column.

[0019] In some embodiments, the third positioning module also includes a first elastic part; the first elastic part is detachably connected to the third positioning column; the third positioning column is arranged on a side of the third positioning column close to the first positioning column; the first elastic part abuts against an end of the second positioning module away from the plate body.

[0020] In some embodiments, the third positioning module further includes a balancing hole; the balancing hole penetrates from one side of the fourth positioning column to the other side along the axial direction of the fourth positioning column.

[0021] In some embodiments, the support unit includes an air supply part, a second elastic part, and a cover plate; the cover plate is detachably connected to one side of the first pole unit; the air supply part is detachably connected to the cover plate; the air supply part is communicated with the support chamber; one end of the second elastic part is detachably connected to the third positioning module, and the other end is detachably connected to the cover plate.

[0022] In some embodiments, the first nut includes a first mother body and a first welding point; the first welding point is fixedly connected to one side of the first mother body;

[0023] The second nut includes a second mother body and a second welding point; the second welding point is fixedly connected to one side of the second mother body;

[0024] The first welding state also includes that when the support unit supplies fluid to the support chamber, the second pole body pushes the first mother body mounted on the third positioning module, so that the first welding point abuts against the plate body on the side around the first hole; the first pole unit is electrically connected to the second pole body through the plate body, the first welding point, and the first mother body in sequence; the second welding state also includes that when the support unit supplies fluid to the support chamber, the second pole body pushes the second mother body mounted on the second positioning module, so that the second welding point abuts against the plate body on the side around the second hole; the first pole unit is electrically connected to the second pole body through the plate body, the second welding point, and the second mother body in sequence.

[0025] In a second aspect, the present invention provides a resistance welding method, which is applied to any one of the resistance welding systems described in the first aspect, and the resistance welding method may include:

[0026] Step S11, based on the completion of the plate positioning, obtaining the distances between the first hole that has not been welded yet, the second hole that has not been welded yet and the positioning unit respectively;

[0027] Step S12, based on the distances between the first hole of unfinished welding and the second hole of unfinished welding and the positioning unit, the positioning unit moves to be coaxial with the first hole of unfinished welding or the second hole of unfinished welding that is closest to the first hole of unfinished welding or the second hole of unfinished welding;

[0028] Step S13, based on the positioning unit moving to be coaxial with the first hole or the second hole that is closest to the unfinished welding, the positioning unit moves toward the plate body;

[0029] Step S14, based on the positioning unit moving toward the plate body to the first setting state or the second setting state, the second pole body moves toward the plate body; wherein the first setting state includes the second positioning module abutting against the first hole that has not been welded, the first nut is sleeved on the outer circumference of the third positioning module, and the first positioning module abuts against the first pole unit in the axial direction of the first positioning module and remains stationary; the second setting state includes the first positioning module abutting against the second hole that has not been welded, the second nut is sleeved on the outer circumference of the second positioning module, and the first positioning module abuts against the first pole unit in the axial direction of the first positioning module and remains stationary;

[0030] Step S15, based on the first nut abutting against the plate body on the side of the first hole that has not been welded, the plate body abuts against the first pole unit, and welding begins; wherein the welding includes the first pole unit being electrically connected to the second pole body in sequence through the plate body and the first nut;

[0031] Step S16, based on the second nut abutting against the plate body on the side of the second hole that has not been welded, the plate body abuts against the first pole unit, and welding begins; wherein the welding also includes the first pole unit being electrically connected to the second pole body in sequence through the plate body and the second nut;

[0032] Step S17, based on completion of welding, the second pole body moves a set distance away from the first pole unit;

[0033] Step S18, based on the second polar body moving the set distance in a direction away from the first polar unit, executing step S11.

[0034] In order to solve the problem of low welding efficiency of various types of nuts and thin plates, the present invention has the following advantages:

[0035] The positioning unit includes a tubular first positioning module, a tubular second positioning module, and a columnar third positioning module, and the central axes of the first positioning module, the second positioning module, and the third positioning module coincide. The inner peripheral wall of the second positioning module abuts against the outer peripheral wall of the third positioning module; the outer peripheral wall of the second positioning module abuts against the inner peripheral wall of the first positioning module. In the first welding state, the outer peripheral wall of the second positioning module abuts against the inner peripheral wall of the first hole, and the outer peripheral wall of the third positioning module abuts against the inner peripheral wall of the first nut, thereby realizing the positioning of the first nut and the first hole. In the second welding state, the outer peripheral wall of the first positioning module abuts against the inner peripheral wall of the second hole, and the outer peripheral wall of the second positioning module abuts against the inner peripheral wall of the second nut, thereby realizing the positioning of the second nut and the second hole. Using the same positioning unit, the positioning of holes and nuts of different sizes on the plate can be realized, and the positioning method is simple, the reliability is strong, and the efficiency of repeated positioning is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a resistance welding system according to an embodiment is shown;

[0037] Figure 2 A partial enlarged view of a resistance welding system according to an embodiment is shown;

[0038] Figure 3 A partial enlarged view of a resistance welding system according to another embodiment is shown;

[0039] Figure 4 A schematic diagram of a welding plate unit according to an embodiment is shown;

[0040] Figure 5 A partial schematic diagram of a resistance welding system according to an embodiment is shown;

[0041] Figure 6 A partial schematic diagram of a resistance welding system according to another embodiment is shown;

[0042] Figure 7 A partial schematic diagram of a resistance welding system according to another embodiment is shown;

[0043] Figure 8 A partial schematic diagram of a resistance welding system according to another embodiment is shown;

[0044] Fig. 9 A partial schematic diagram of a resistance welding system according to another embodiment is shown;

[0045] Fig.10 A partial schematic diagram of a resistance welding system according to another embodiment is shown;

[0046] Fig.11 A flow chart of a resistance welding method according to an embodiment is shown.

[0047] Reference numerals: 01 welding machine assembly; 11 main machine; 12 workbench; 02 first pole assembly; 21 first pole unit; 211 first pole body; 212 first positioning hole; 213 second positioning hole; 214 third positioning hole; 22 positioning unit; 221 first positioning module; 2211 first positioning ring; 2212 second positioning ring; 2213 third positioning ring; 2214 fourth positioning ring; 222 second positioning module; 2221 fifth positioning ring; 2222 sixth positioning ring; 2223 seventh positioning ring; 2224 eighth positioning ring; 223 third positioning module; 2231 first positioning column; 22 32 second positioning column; 2233 third positioning column; 2234 first elastic part; 2235 fourth positioning column; 2236 balancing hole; 2237 fifth positioning column; 23 supporting unit; 231 air supply part; 232 second elastic part; 233 cover plate; 24 first driving unit; 03 second pole assembly; 31 second pole body; 32 avoidance hole; 33 second driving unit; 04 workpiece assembly; 41 welding plate unit; 411 plate body; 412 first hole; 413 second hole; 42 first nut; 421 first mother body; 422 first welding point; 43 second nut; 431 second mother body; 432 second welding point. DETAILED DESCRIPTION

[0048] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0049] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0050] In this embodiment, nuts are welded on a plate 411 with holes, and bolts are used in conjunction to achieve connection between an object and a thinner plate 411. The bolts need to pass through the holes and threaded holes on the plate 411 at the same time, so the nuts and the holes on the plate 411 need to be positioned during welding. When at least two sizes of nuts need to be welded on the plate 411, and these nuts of different sizes need to be welded at different positions, it is necessary to switch the nut positioning tooling back and forth (long replacement time), or to weld nuts of one specification and then weld nuts of another specification (long welding movement path), which ultimately leads to long processing time, low efficiency, and easy problem of nut positioning tilt. Therefore, a resistance welding system is proposed. As Figure 1 As shown, the resistance welding system may include a welding machine assembly 01 , a workpiece assembly 04 , a first pole assembly 02 , and a second pole assembly 03 .

[0051] The welding machine assembly 01 may include a host 11 and a workbench 12. The host 11 may be detachably connected to the workbench 12, and the host 11 may be fixed by the workbench 12. The workbench 12 may also provide a fixing and supporting position for the workpiece assembly 04, the first pole unit 21, and the second pole unit. During the processing, the plate 411 may be fixed by the workbench 12 to prevent the plate 411 from shaking during the resistance welding process, thereby improving the welding quality.

[0052] The workpiece assembly 04 may include a welding plate unit 41, a first nut 42, and a second nut 43. Figure 4 As shown, the welding plate unit 41 may include a plate body 411, a first hole 412, and a second hole 413. The first hole 412 and the second hole 413 may respectively penetrate from one side of the plate body 411 to the other side along the thickness direction of the plate body 411, and the first hole 412 and the second hole 413 may be arranged at intervals. The first nut 42 may be arranged corresponding to the first hole 412, and the second nut 43 may be arranged corresponding to the second hole 413.

[0053] like Figure 1As shown, the first pole assembly 02 may include a first pole unit 21, a positioning unit 22, a support unit 23, and a first drive unit 24. The first drive unit 24 may be detachably connected to the workbench 12. The first drive unit 24 may drive the first pole unit 21 to move, so that the positioning unit 22 can position the first nut 42, the first hole 412 or the second nut 43, the second hole 413 at different positions. The first pole unit 21 may be configured to be hollow. The positioning unit 22 may include a first positioning module 221, a second positioning module 222, and a third positioning module 223. The first positioning module 221 and the second positioning module 222 may be configured to be tubular, and the third positioning module 223 may be columnar. The first positioning module 221, the second positioning module 222, and the third positioning module 223 may have the same central axis. The inner peripheral wall of the second positioning module 222 may abut against the outer peripheral wall of the third positioning module 223. The outer peripheral wall of the second positioning module 222 may abut against the inner peripheral wall of the first positioning module 221. The outer peripheral wall of the first positioning module 221 abuts against the inner wall of the hollow cavity of the first pole unit 21. When the first nut 42 and the first hole 412 need to be welded, the outer peripheral wall of the second positioning module 222 abuts against the inner peripheral wall of the first hole 412, and the outer peripheral wall of the third positioning module 223 abuts against the inner peripheral wall of the first nut 42, thereby realizing the positioning of the first nut 42 and the first hole 412; when the second nut 43 and the second hole 413 need to be welded, the outer peripheral wall of the first positioning module 221 abuts against the inner peripheral wall of the second hole 413, and the outer peripheral wall of the second positioning module 222 abuts against the inner peripheral wall of the second nut 43, thereby realizing the positioning of the second nut 43 and the second hole 413. At least one end of the first positioning module 221, one end of the third positioning module 223, and the hollow cavity of the first pole unit 21 surround and form a support chamber. The support chamber can accommodate the positioning unit 22, and the support chamber can be connected with the support unit 23. The support unit 23 can drive the positioning unit 22 to rise or fall. The first pole unit 21 may be electrically connected to the host 11 , so that the plate 411 is charged through the first pole unit 21 during the resistance welding process.

[0054] The second pole assembly 03 may include a second pole body 31 and a second drive unit 33. The second drive unit 33 may be detachably connected to the workbench 12. The second drive unit 33 may drive the second pole body 31 to move, so that the second pole body 31 may abut against the first nut 42 or the second nut 43, and drive the first nut 42 or the second nut 43 to descend, so that the first nut 42 or the second nut 43 may abut against the plate body 411, and generate a certain extrusion force, so as to facilitate resistance welding of the plate body 411 with the first nut 42 and the second nut 43 respectively. The second pole body 31 may be electrically connected to the host 11, so that the first nut 42 or the second nut 43 may be charged through the first pole unit 21 during the resistance welding process.

[0055] The resistance welding system may also include a positioning state, a first welding state, and a second welding state. The positioning state may include the support unit 23 supplying fluid to the support chamber, thereby driving the third positioning module 223 to move upward along the axis direction of the third positioning module 223; one end of the third positioning module 223 may protrude in the axis direction away from the third positioning module 223, pushing the first positioning module 221 and the first pole unit 21 to abut and remain stationary in the axial direction of the first positioning module 221, so as to provide positioning for the first hole 412, the first nut 42 or the second hole 413, the second nut 43. The first welding state may include that when the support unit 23 supplies fluid to the support chamber to drive the positioning unit 22 to move upward, the second driving unit 33 may drive the second pole body 31 to push the first nut 42 sleeved on the third positioning module 223 to move downward along the axis direction of the third positioning module 223, so that the first nut 42 abuts against the plate body 411 on the side of the first hole 412. The plate body 411 can be in contact with the first pole unit 21, and the first pole unit 21 can be electrically connected to the second pole body 31 through the plate body 411 and the first nut 42 in sequence, so that a current path can be formed between the first nut 42 and the plate body 411 around the first hole 412, and resistance welding of the first nut 42 and the plate body 411 around the first hole 412 can be achieved. The second welding state can include that when the support unit 23 supplies fluid to the support chamber, the second pole body 31 pushes the second nut 43 sleeved on the second positioning module 222 to move downward along the axial direction of the second positioning module 222, so that the second nut 43 is in contact with the plate body 411 around the second hole 413. The plate body 411 can be abutted against the first pole unit 21, and the first pole unit 21 can be electrically connected to the second pole body 31 through the plate body 411 and the second nut 43 in sequence, so that a current path can be formed between the second nut 43 and the plate body 411 on the side around the second hole 413, thereby realizing resistance welding of the second nut 43 and the plate body 411 on the side around the second hole 413.

[0056] In other embodiments, the manner in which the support unit 23 drives the positioning unit 22 to rise or fall is not limited and can be flexibly selected according to actual conditions. For example, the support unit 23 may input air, oil, etc. into the support chamber, and change the pressure in the support chamber by controlling the input or output of the fluid, thereby driving the positioning unit 22 to rise or fall. The second pole assembly 03 may also include an avoidance hole 32, which may be located on the vertical axis of the second pole body 31, and the diameter of the avoidance hole 32 may be slightly larger than the inner diameter of the second nut 43, so as to avoid the positioning unit 22 in the process of the second pole body 31 driving the first nut 42 or the second nut 43 to descend. In the positioning state, two results can be produced according to the difference between the first hole 412 and the second hole 413. One is that when the welding objects are the first nut 42 and the first hole 412, the outer peripheral wall of the second positioning module 222 abuts against the inner wall of the first hole 412, and the outer peripheral wall of the third positioning module 223 abuts against the inner peripheral wall of the first nut 42, thereby realizing the positioning of the first nut 42 and the first hole 412; the other is that when the welding objects are the second nut 43 and the second hole 413, the outer peripheral wall of the first positioning module 221 abuts against the inner peripheral wall of the second hole 413, and the outer peripheral wall of the second positioning module 222 abuts against the inner peripheral wall of the second nut 43, thereby realizing the positioning of the second nut 43 and the second hole 413.

[0057] In this embodiment, if Figure 1As shown, the first pole unit 21 may include a first pole body 211, a first positioning hole 212, a second positioning hole 213, and a third positioning hole 214. The first pole body 211 may be a solid part of the first pole unit 21, and the first positioning hole 212, the second positioning hole 213, and the third positioning hole 214 may all be holes arranged on the first pole body 211. The first positioning hole 212, the second positioning hole 213, and the third positioning hole 214 may be sequentially connected along the axial direction of the first positioning hole 212, and pass through from one side of the first pole body 211 to the other side. In the positioning state, the central axis of the positioning unit 22 coincides with the central axes of the first positioning hole 212, the second positioning hole 213, and the third positioning hole 214 at the same time. The internal space of the first pole body 211 formed by the first positioning hole 212, the second positioning hole 213, and the third positioning hole 214 is adapted to the shape of the positioning unit 22, especially to the shape of the outer peripheral wall of the first positioning module 221, so as to meet the up and down movement of the positioning unit 22 in the internal space of the first pole body 211. When the positioning unit 22 slides up and down along the central axis of the first pole body 211, the first positioning hole 212 and the third positioning hole 214 can continuously contact the positioning unit 22 to play a guiding role, so as to prevent the positioning unit 22 from tilting. The inner diameter of the second positioning hole 213 can be gradually reduced along the direction from the third positioning hole 214 to the first positioning hole 212, so as to limit the upward movement of the first positioning module 221. At least one end of the first positioning module 221, one end of the third positioning module 223, and the third positioning hole 214 surround and form a support chamber, and the positioning unit 22 can slide up and down along the axis direction of the first pole body 211 in the support chamber under the guidance of the first positioning hole 212 and the third positioning hole 214. The first pole body 211 is electrically connected to the host 11. When the first pole body 211 contacts the plate body 411, the plate body 411 can be charged, which is convenient for resistance welding.

[0058] The positioning state may also include the support unit 23 supplying fluid to the support chamber, driving the third positioning module 223 to rise along the axial direction of the first positioning hole 212, and the end of the third positioning module 223 may abut against the bottom end surface of the first positioning module 221, thereby pushing the first positioning module 221 to rise until the first positioning module 221 abuts against the first positioning hole 212, the second positioning hole 213, and the third positioning hole 214 in the axial direction of the first positioning hole 212 and remains stationary, thereby limiting the vertical stroke of the first positioning module 221, and the positioning unit 22 is in a stationary state to facilitate positioning of the workpiece assembly 04. The first welding state may also include that when the support unit 23 supplies fluid to the support chamber, the plate body 411 abuts against the first pole body 211 and conducts electricity. The first pole body 211 may be electrically connected to the second pole body 31 through the plate body 411 and the first nut 42 in sequence, thereby forming a current between the first nut 42 and the plate body 411, which is convenient for starting resistance welding.

[0059] In this embodiment, if Figure 2 As shown, the first positioning module 221 may include a first positioning ring 2211, a second positioning ring 2212, a third positioning ring 2213, and a fourth positioning ring 2214. The first positioning ring 2211, the second positioning ring 2212, the third positioning ring 2213, and the fourth positioning ring 2214 may be fixedly connected in sequence along the axial direction of the first positioning ring 2211. The inner diameters of the first positioning ring 2211, the second positioning ring 2212, the third positioning ring 2213, and the fourth positioning ring 2214 may abut against the outer diameter of the second positioning module 222, respectively. The outer diameter of the first positioning ring 2211 may gradually increase from the first positioning ring 2211 to the third positioning ring 2213. The aperture of the second hole 413 on the plate body 411 is adapted to the outer diameter of the second positioning ring 2212 of the first positioning module 221. When the support unit 23 drives the positioning unit 22 to rise, the first positioning ring 2211 may guide the second positioning ring 2212 of the first positioning module 221 to pass through the second hole 413. At the same time, when the second nut 43 is sleeved on the second positioning module 222, the first positioning ring 2211 can provide support for the second nut 43 to achieve the positioning of the second nut 43. The inner diameter of the third positioning ring 2213 can gradually increase along the direction from the first positioning ring 2211 to the third positioning ring 2213, and the inner diameter of the third positioning ring 2213 can abut against the outer diameter of the second positioning module 222, which can limit the upward movement of the second positioning module 222. The outer diameter of the third positioning ring 2213 can gradually increase along the direction from the first positioning ring 2211 to the third positioning ring 2213, and the outer diameter of the third positioning ring 2213 can abut against the inner peripheral wall of the second positioning hole 213 of the first pole unit 21, which can limit the upward movement of the first positioning module 221. The outer peripheral wall of the second positioning ring 2212, the outer peripheral wall of the third positioning ring 2213, and the outer peripheral wall of the fourth positioning ring 2214 are respectively abutted against the inner wall of the hollow cavity of the first pole unit 21. The second positioning ring 2212 and the fourth positioning ring 2214 cooperate with the first pole unit 21 to play a guiding role in the process of the first positioning module 221 sliding along the central axis direction of the positioning unit 22 .

[0060] The positioning state can also include the support unit 23 supplying fluid to the support chamber, driving the end of the third positioning module 223 to drive the fourth positioning ring 2214 to move upward, so that the second positioning ring 2212, the third positioning ring 2213, and the fourth positioning ring 2214 are respectively abutted against the axial direction of the second positioning ring 2212 with the first pole unit 21 and remain stationary, thereby facilitating resistance welding of the workpiece assembly 04.

[0061] In this embodiment, if Figure 2As shown, the second positioning module 222 may include a fifth positioning ring 2221, a sixth positioning ring 2222, a seventh positioning ring 2223, and an eighth positioning ring 2224. The fifth positioning ring 2221, the sixth positioning ring 2222, the seventh positioning ring 2223, and the eighth positioning ring 2224 may be fixedly connected in sequence along the axial direction of the fifth positioning ring 2221. The inner circumferential walls of the fifth positioning ring 2221, the sixth positioning ring 2222, the seventh positioning ring 2223, and the eighth positioning ring 2224 may all be in contact with the outer circumferential wall of the third positioning module 223, so that the second positioning module 222 and the third positioning module 223 may guide each other in the axial movement of the positioning unit 22. The outer diameter of the fifth positioning ring 2221 may gradually increase from the fifth positioning ring 2221 to the seventh positioning ring 2223. The outer diameter of the sixth positioning ring 2222 may match the inner diameter of the second nut 43. The aperture of the first hole 412 on the plate body 411 is adapted to the outer diameter of the sixth positioning ring 2222 of the second positioning module 222. When the support unit 23 drives the positioning unit 22 to rise, the fifth positioning ring 2221 can guide the sixth positioning ring 2222 of the second positioning module 222 to pass through the first hole 412. When the first nut 42 is sleeved on the third positioning module 223, the fifth positioning ring 2221 can provide support for the second nut 43 to achieve the positioning of the first nut 42. At the same time, the fifth positioning ring 2221 can also guide the sixth positioning ring 2222 to pass through the inner circumferential wall of the second nut 43 to achieve the positioning of the second nut 43. The outer diameter of the seventh positioning ring 2223 can gradually increase from the fifth positioning ring 2221 to the seventh positioning ring 2223. The outer diameter of the seventh positioning ring 2223 can abut against the inner circumferential wall of the first positioning module 221, and can limit the upward movement of the second positioning module 222. The outer peripheral walls of the sixth positioning ring 2222, the seventh positioning ring 2223, and the eighth positioning ring 2224 are respectively in contact with the inner peripheral wall of the first positioning module 221. The sixth positioning ring 2222 and the eighth positioning ring 2224 cooperate with the inner peripheral wall of the first positioning module 221 to guide the second positioning module 222 in the process of sliding along the central axis of the positioning unit 22.

[0062] The second welding state may further include the second pole body 31 pushing the second nut 43 sleeved on the sixth positioning ring 2222 to move toward a direction close to the plate body 411 .

[0063] In this embodiment, if Figure 3As shown, the third positioning module 223 may include a first positioning column 2231, a second positioning column 2232, a third positioning column 2233, a fourth positioning column 2235, and a fifth positioning column 2237. The first positioning column 2231, the second positioning column 2232, the third positioning column 2233, the fourth positioning column 2235, and the fifth positioning column 2237 may be fixedly connected in sequence along the axial direction of the first positioning column 2231. The outer diameter of the first positioning column 2231 may gradually increase from the first positioning column 2231 to the fourth positioning column 2235. The first positioning column 2231 may guide a portion of the positioning unit 22 to pass through the first nut 42 or the second nut 43 and the first hole 412 or the second hole 413. The outer peripheral wall of the second positioning column 2232 may abut against the inner peripheral wall of the second positioning module 222. The outer diameter of the second positioning column 2232 may match the inner diameter of the first nut 42, so that the first nut 42 may be positioned. The diameter of the third positioning column 2233 can be larger than the inner diameter of the second positioning module 222 and smaller than the outer diameter of the second positioning module 222. A stepped step can be formed at the junction of the second positioning column 2232 and the third positioning column 2233. The end surface of the step close to the side of the plate body 411 can abut against the second positioning module 222, so that the first positioning module 221 can drive the second positioning module 222 to rise together. The outer peripheral wall of the fourth positioning column 2235 can abut against the inner wall of the hollow cavity of the first pole unit 21, the bottom end surface of the fourth positioning column 2235 can form a supporting chamber with the inner wall of the first pole unit 21, and the top end surface of the fourth positioning column 2235 can abut against the first positioning module 221. The first positioning module 221 can drive the first positioning module 221 to rise together. The second positioning column 2232 and the fourth positioning column 2235 can also play a guiding role in the process of the first positioning module 221 rising or falling along the central axis of the positioning unit 22. The fifth positioning column 2237 may protrude downward from the center of the bottom end surface of the fourth positioning column 2235, and the fifth positioning column 2237 may be spaced apart from the inner wall of the hollow cavity of the first pole unit 21. The fifth positioning column 2237 may cooperate with the support unit 23 and play a role in the process of the first positioning module 221 rising or falling.

[0064] The positioning state may also include the support unit 23 supplying fluid to the support chamber, the fluid pressure acting on the bottom end surface of the fourth positioning column 2235, driving the fourth positioning column 2235 to push the first positioning module 221 to rise to abut against the first pole unit 21 in the axial direction of the first positioning module 221 and remain stationary. The first welding state may also include that when the support unit 23 supplies fluid to the support chamber, the second pole body 31 pushes the first nut 42 sleeved on the first positioning column 2231 to move toward the direction close to the plate body 411.

[0065] In this embodiment, if Figure 3As shown, the third positioning module 223 may further include a first elastic portion 2234. The first elastic portion 2234 can be retracted in a direction parallel to the axis of the positioning unit 22 and has a certain elasticity. The first elastic portion 2234 may be detachably connected to the third positioning column 2233. The third positioning column 2233 may be arranged on a side of the third positioning column 2233 close to the first positioning column 2231. One end face of the first elastic portion 2234 may be detachably connected to an upper end face of a stepped step formed by the third positioning column 2233 protruding relative to the second positioning column 2232, and the other end face of the first elastic portion 2234 may abut against an end of the second positioning module 222 away from the plate body 411. After the support unit 23 drives the third positioning module 223 to rise to the set position, if the first positioning module 221 and the second positioning module 222 are pressed by the upper end surface of the fourth positioning column 2235 and the upper end surface of the protruding step formed by the third positioning column 2233, the first positioning module 221 and the second positioning module 222 cannot be pressed at the same time due to over-definition, thereby affecting the positioning of the workpiece assembly 04. Therefore, by setting the first elastic part 2234 between the upper end surface of the protruding step formed by the third positioning column 2233 and the bottom end surface of the second positioning module 222, when the third positioning module 223 drives the first positioning module 221 and the second positioning module 222 to rise at the same time, and after rising to the specified position, the first positioning module 221 and the second positioning module 222 can be pressed at the same time, thereby avoiding the occurrence of over-definition.

[0066] In this embodiment, the third positioning module 223 may further include a balancing hole 2236. The balancing hole 2236 may penetrate from one side of the fourth positioning column 2235 to the other side along the axial direction of the fourth positioning column 2235. Thus, during the upward and downward movement of the positioning unit 22, it is possible to prevent excessive accumulation of air or other fluids on the side of the fourth positioning column 2235 close to the plate body 411, and to prevent the fourth positioning column 2235 from being blocked from moving due to pressure imbalance at both ends of the fourth positioning column 2235 along the axial direction, thereby affecting the positioning of the workpiece assembly 04.

[0067] In this embodiment, if Figure 1As shown, the support unit 23 may include an air supply portion 231, a second elastic portion 232, and a cover plate 233. The cover plate 233 may be detachably connected to a side of the first pole unit 21 away from the plate body 411, so that the support chamber can be isolated from the external environment. The cover plate 233 can also be used to fix and support the second elastic portion 232. The air supply portion 231 can be detachably connected to the cover plate 233. The air supply portion 231 can be communicated with the support chamber. The air supply portion 231 can input fluid into the support chamber to drive the positioning unit 22 to rise or fall. One end of the second elastic portion 232 can be detachably connected to the third positioning module 223, and the other end can be detachably connected to the cover plate 233. By providing the second elastic portion 232, a buffering effect can be played when the air supply portion 231 fails or the positioning unit 22 descends, thereby avoiding damage to the positioning unit 22.

[0068] In this embodiment, if Figure 8 As shown, the first nut 42 may include a first matrix 421 and a first welding point 422. The first matrix 421 may be the main body of the first nut 42. The first welding point 422 may be fixedly connected to one side of the first matrix 421. When the first nut 42 abuts against and squeezes the plate 411, the first welding point 422 melts after power is applied, so that the first matrix 421 can be welded to the plate 411.

[0069] like Figure 2 As shown, the second nut 43 may include a second matrix 431 and a second welding point 432. The second matrix 431 may be the body of the second nut 43. The second welding point 432 may be fixedly connected to one side of the second matrix 431. When the second nut 43 abuts against and squeezes the plate 411, the second welding point 432 melts after power is applied, so that the second matrix 431 can be welded to the plate 411.

[0070] The first welding state may also include that when the support unit 23 supplies fluid to the support chamber, the second pole body 31 may push the first matrix 421 sleeved on the third positioning module 223, so that the first welding point 422 abuts against the plate body 411 around the first hole 412. The first pole unit 21 may be electrically connected to the second pole body 31 through the plate body 411, the first welding point 422, and the first matrix 421 in sequence, so that the first welding point 422 melts and the plate body 411 and the first matrix 421 are welded together. The second welding state may also include that when the support unit 23 supplies fluid to the support chamber, the second pole body 31 pushes the second matrix 431 sleeved on the second positioning module 222, so that the second welding point 432 abuts against the plate body 411 around the second hole 413. The first pole unit 21 is electrically connected to the second pole body 31 through the plate body 411 , the second welding point 432 , and the second matrix 431 in sequence, so that the second welding point 432 is melted and the plate body 411 and the second matrix 431 are welded together.

[0071] In other embodiments, the first welding spot 422 can be circumferentially distributed on the side of the first nut 42 close to the plate body 411 according to the first set radius, and the second welding spot 432 can be circumferentially distributed on the side of the second nut 43 close to the plate body 411 according to the second set radius. The first set radius is slightly smaller than the outer diameter of the first nut 42, and the second set radius is slightly smaller than the outer diameter of the second nut 43, so as to avoid welding the first nut 42 or the second nut 43 to the positioning unit 22 during the welding process. The horizontal cross-sectional area of ​​the first welding spot 422 can be gradually reduced from close to the first matrix 421 to far away from the first matrix 421, and the horizontal cross-sectional area of ​​the second welding spot 432 can be gradually reduced from close to the second matrix 431 to far away from the second matrix 431. During the welding process, the second pole assembly 03 is continuously pressed down, and the contact area between the first welding spot 422 or the second welding spot 432 and the plate body 411 is small, so that the pressure becomes larger under a constant pressure, making the welding more firm.

[0072] This embodiment discloses a resistance welding method, which is applied to a resistance welding system of any of the above embodiments, such as Fig.11 As shown, the resistance welding method may include:

[0073] In step S11, based on the positioning and fixing of the plate body 411 by the workbench 12, the displacement of the plate body 411 can be limited, and the distances between the unfinished first hole 412, the unfinished second hole 413 and the positioning unit 22 can be respectively obtained.

[0074] Step S12, based on the distances between the first hole 412 of the unfinished welding and the second hole 413 of the unfinished welding and the positioning unit 22, the positioning unit 22 moves to the coaxial center with the nearest first hole 412 of the unfinished welding or the nearest second hole 413 of the unfinished welding. By finding the nearest first hole 412 of the unfinished welding or the nearest second hole 413 of the unfinished welding, the welding path can be shortened and the welding efficiency can be improved.

[0075] Step S13, based on the positioning unit 22 moving to the coaxial center with the nearest unfinished welding first hole 412 or unfinished welding second hole 413, the support unit 23 can drive the positioning unit 22 to move toward the direction close to the plate body 411, thereby completing the positioning of the first nut 42 or the second nut 43 before welding.

[0076] Step S14: Based on the positioning unit 22 moving toward the plate 411 to the first setting state or the second setting state, the second pole unit can drive the second pole body 31 to move toward the plate 411. Figure 8As shown, the first setting state may include that the outer wall of the second positioning module 222 abuts against the inner wall of the first hole 412 that has not been welded, the first nut 42 is sleeved on the outer circumference of the third positioning module 223, and the first positioning module 221 abuts against the first pole unit 21 in the axial direction of the first positioning module 221 and is in a stationary state. Figure 5 As shown, the second setting state may include the outer wall of the first positioning module 221 abutting against the inner wall of the second hole 413 that has not been welded, the second nut 43 may be sleeved on the outer peripheral side of the second positioning module 222, and the first positioning module 221 may abut against the first pole unit 21 in the axial direction of the first positioning module 221 and remain stationary. In the first setting state or the second setting state, the positioning of the workpiece assembly 04 before welding can be achieved. The second pole unit can drive the second pole body 31 to move toward the plate body 411, which may include two situations: one is, Fig. 9 , Fig.10 As shown, the second pole body 31 moves toward the plate body 411 until the second pole body 31 abuts against the first nut 42, and then continues to move, driving the first nut 42 to abut against the plate body 411 around the first hole 412, thereby achieving the positioning of the first nut 42 and the first hole 412 before welding; secondly, as shown Figure 6 , Figure 7 As shown, the second pole body 31 moves toward the plate body 411 until the second pole body 31 abuts against the second nut 43, and then continues to move, driving the second nut 43 to abut against the plate body 411 around the second hole 413, thereby achieving the positioning of the second nut 43 and the second hole 413 before welding.

[0077] Step S15, based on the first nut 42 abutting against the plate 411 on the side of the first hole 412 that has not been welded, the plate 411 can abut against the first pole unit 21 to start welding. The welding can include the first pole unit 21 being electrically connected to the second pole body 31 in sequence through the plate 411 and the first nut 42, and the second pole body 31 can continuously apply pressure to the first nut 42 during the welding process, so that a certain pressure is maintained between the first nut 42 and the plate 411, which can improve the welding quality.

[0078] Step S16, based on the second nut 43 abutting against the plate 411 around the unwelded second hole 413, the plate 411 abuts against the first pole unit 21, and welding begins. The welding may also include the first pole unit 21 being electrically connected to the second pole body 31 in sequence through the plate 411 and the second nut 43, and the second pole body 31 may continuously apply pressure to the second nut 43 during the welding process, so that a certain pressure is maintained between the second nut 43 and the plate 411, which can improve the welding quality.

[0079] Step S17, based on the completion of welding, the second pole body 31 can move away from the first pole unit 21 by a set distance, and the support unit 23 can drive the positioning unit 22 to descend by a set distance to prevent the positioning unit 22 from interfering with the horizontal movement of the first pole unit 21. The first pole unit 21 can move away from the plate body 411 by a certain distance to facilitate moving to the position of the next first hole 412 or the second hole 413.

[0080] Step S18 , based on the second pole body 31 moving away from the first pole unit 21 by a set distance, step S11 is executed until the first hole 412 and the first nut 42 , and the second hole 413 and the second nut 43 set on the plate body 411 are welded.

[0081] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A resistance welding system, characterized in that: The resistance welding system comprises: A welding machine assembly, the welding machine assembly comprising a main machine and a workbench; the main machine and the workbench are detachably connected; A workpiece assembly, the workpiece assembly comprising a welding plate unit, a first nut, and a second nut; the welding plate unit comprises a plate body, a first hole, and a second hole; the first hole and the second hole are arranged at intervals; A first pole assembly, the first pole assembly comprises a first pole unit, a positioning unit, a supporting unit, and a first driving unit; the first driving unit is detachably connected to the workbench; the first driving unit drives the first pole unit to move; the first pole unit is arranged to be hollow; the positioning unit comprises a first positioning module, a second positioning module, and a third positioning module; the first positioning module and the second positioning module are arranged to be tubular; the inner peripheral wall of the second positioning module abuts against the outer peripheral wall of the third positioning module; the outer peripheral wall of the second positioning module abuts against the inner peripheral wall of the first positioning module; the outer peripheral wall of the first positioning module abuts against the inner wall of the hollow cavity of the first pole unit; at least one end of the first positioning module, one end of the third positioning module, and the hollow cavity of the first pole unit surround to form a supporting chamber; the supporting chamber is communicated with the supporting unit; the first pole unit is electrically connected to the host; A second pole assembly, the second pole assembly comprising a second pole body and a second driving unit; the second driving unit drives the second pole body to move; the second driving unit is detachably connected to the workbench; the second pole body is electrically connected to the host; The resistance welding system also includes a positioning state, a first welding state, and a second welding state; the positioning state includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the first positioning module and the first pole unit to abut against the axial direction of the first positioning module and remain stationary; the first welding state includes when the support unit supplies fluid to the support chamber, the second pole body pushes the first nut sleeved on the third positioning module, so that the first nut abuts against the plate body on the side of the first hole, and the plate body abuts against the first pole unit; the first pole unit is electrically connected to the second pole body through the plate body and the first nut in turn; the second welding state includes when the support unit supplies fluid to the support chamber, the second pole body pushes the second nut sleeved on the second positioning module, so that the second nut abuts against the plate body on the side of the second hole, and the plate body abuts against the first pole unit; the first pole unit is electrically connected to the second pole body in turn through the plate body and the second nut; The first positioning module includes a first positioning ring, a second positioning ring, a third positioning ring, and a fourth positioning ring; the first positioning ring, the second positioning ring, the third positioning ring, and the fourth positioning ring are fixedly connected in sequence along the axial direction of the first positioning ring; the outer diameter of the first positioning ring gradually increases from the first positioning ring to the third positioning ring; the inner diameter of the third positioning ring gradually increases from the first positioning ring to the third positioning ring; the outer diameter of the third positioning ring gradually increases from the first positioning ring to the third positioning ring; the outer peripheral wall of the second positioning ring, the outer peripheral wall of the third positioning ring, and the outer peripheral wall of the fourth positioning ring are respectively abutted against the inner wall of the hollow cavity of the first pole unit; The positioning state also includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the fourth positioning ring, so that the second positioning ring, the third positioning ring, and the fourth positioning ring are respectively in contact with the first pole unit in the axial direction of the second positioning ring and remain stationary.

2. A resistance welding system according to claim 1, characterized in that: The first pole unit includes a first pole body, a first positioning hole, a second positioning hole, and a third positioning hole; the first positioning hole, the second positioning hole, and the third positioning hole are sequentially connected along the axial direction of the first positioning hole, and penetrate from one side of the first pole body to the other side; the inner diameter of the second positioning hole gradually decreases along the direction from the third positioning hole to the first positioning hole; at least one end of the first positioning module, one end of the third positioning module, and the third positioning hole surround and form a supporting chamber; the first pole body is electrically connected to the host; The positioning state also includes the support unit supplying fluid to the support chamber, driving the end of the third positioning module to push the first positioning module to abut the first positioning hole, the second positioning hole, and the third positioning hole in the axial direction of the first positioning hole and remain stationary; the first welding state also includes when the support unit supplies fluid to the support chamber, the plate body abuts against the first pole body; the first pole body is electrically connected to the second pole body through the plate body and the first nut in turn.

3. A resistance welding system according to claim 1, characterized in that: The second positioning module comprises a fifth positioning ring, a sixth positioning ring, a seventh positioning ring and an eighth positioning ring; the fifth positioning ring, the sixth positioning ring, the seventh positioning ring and the eighth positioning ring are fixedly connected in sequence along the axial direction of the fifth positioning ring; the outer diameter of the fifth positioning ring gradually increases from the fifth positioning ring to the seventh positioning ring; the outer diameter of the seventh positioning ring gradually increases from the fifth positioning ring to the seventh positioning ring; the outer peripheral walls of parts of the sixth positioning ring, the seventh positioning ring and the eighth positioning ring are respectively in contact with the inner peripheral wall of the first positioning module; The second welding state also includes the second pole body pushing the second nut sleeved on the sixth positioning ring.

4. A resistance welding system according to claim 1, characterized in that: The third positioning module includes a first positioning column, a second positioning column, a third positioning column, a fourth positioning column, and a fifth positioning column; the first positioning column, the second positioning column, the third positioning column, the fourth positioning column, and the fifth positioning column are fixedly connected in sequence along the axial direction of the first positioning column; the outer diameter of the first positioning column gradually increases from the first positioning column to the fourth positioning column; the outer peripheral wall of the second positioning column abuts against the inner peripheral wall of the second positioning module; the diameter of the third positioning column is larger than the inner diameter of the second positioning module and smaller than the outer diameter of the second positioning module; the outer peripheral wall of the fourth positioning column abuts against the inner wall of the hollow cavity of the first pole unit; the fifth positioning column is spaced apart from the inner wall of the hollow cavity of the first pole unit; The positioning state also includes the support unit supplying fluid to the support chamber, driving the fourth positioning column to push the first positioning module and the first pole unit to abut and remain stationary in the axial direction of the first positioning module; the first welding state also includes when the support unit supplies fluid to the support chamber, the second pole body pushes the first nut sleeved on the first positioning column.

5. A resistance welding system according to claim 4, characterized in that: The third positioning module also includes a first elastic part; the first elastic part is detachably connected to the third positioning column; the third positioning column is arranged on a side of the third positioning column close to the first positioning column; the first elastic part abuts against an end of the second positioning module away from the plate body.

6. A resistance welding system according to claim 4, characterized in that: The third positioning module further includes a balancing hole; the balancing hole penetrates from one side of the fourth positioning column to the other side along the axial direction of the fourth positioning column.

7. A resistance welding system according to claim 1, characterized in that: The support unit includes an air supply part, a second elastic part, and a cover plate; the cover plate is detachably connected to one side of the first pole unit; the air supply part is detachably connected to the cover plate; the air supply part is communicated with the support chamber; one end of the second elastic part is detachably connected to the third positioning module, and the other end is detachably connected to the cover plate.

8. A resistance welding system according to claim 1, characterized in that: The first nut includes a first mother body and a first welding point; the first welding point is fixedly connected to one side of the first mother body; The second nut includes a second mother body and a second welding point; the second welding point is fixedly connected to one side of the second mother body; The first welding state also includes that when the support unit supplies fluid to the support chamber, the second pole body pushes the first mother body sleeved on the third positioning module, so that the first welding point abuts against the plate body on the side around the first hole; The first pole unit is electrically connected to the second pole body through the plate body, the first welding point, and the first mother body in sequence; the second welding state also includes when the support unit supplies fluid to the support chamber, the second pole body pushes the second mother body mounted on the second positioning module, so that the second welding point abuts against the plate body on the side around the second hole; the first pole unit is electrically connected to the second pole body through the plate body, the second welding point, and the second mother body in sequence.

9. A resistance welding method, characterized in that: The resistance welding method is applied to a resistance welding system as described in any one of claims 1 to 8, and the resistance welding method comprises: Step S11, based on the completion of the plate positioning, obtaining the distances between the first hole that has not been welded yet, the second hole that has not been welded yet and the positioning unit respectively; Step S12, based on the distances between the first hole of unfinished welding and the second hole of unfinished welding and the positioning unit, the positioning unit moves to be coaxial with the first hole of unfinished welding or the second hole of unfinished welding that is closest to the first hole of unfinished welding or the second hole of unfinished welding; Step S13, based on the positioning unit moving to be coaxial with the first hole or the second hole that is closest to the unfinished welding, the positioning unit moves toward the plate body; Step S14, based on the positioning unit moving toward the plate body to the first setting state or the second setting state, the second pole body moves toward the plate body; wherein the first setting state includes the second positioning module abutting against the first hole that has not been welded, the first nut is sleeved on the outer circumference of the third positioning module, and the first positioning module abuts against the first pole unit in the axial direction of the first positioning module and remains stationary; the second setting state includes the first positioning module abutting against the second hole that has not been welded, the second nut is sleeved on the outer circumference of the second positioning module, and the first positioning module abuts against the first pole unit in the axial direction of the first positioning module and remains stationary; Step S15, based on the first nut abutting against the plate body on the side of the first hole that has not been welded, the plate body abuts against the first pole unit, and welding begins; wherein the welding includes the first pole unit being electrically connected to the second pole body in sequence through the plate body and the first nut; Step S16, based on the second nut abutting against the plate body on the side of the second hole that has not been welded, the plate body abuts against the first pole unit, and welding begins; wherein the welding also includes the first pole unit being electrically connected to the second pole body in sequence through the plate body and the second nut; Step S17, based on completion of welding, the second pole body moves a set distance away from the first pole unit; Step S18, based on the second polar body moving the set distance in a direction away from the first polar unit, executing step S11.

Images