Spot welding electrode assembly

Abstract

The utility model discloses a spot welding electrode assembly, which belongs to the field of electric resistance welding, and comprises an electrode mechanism, a mounting mechanism and a pressing mechanism, the electrode mechanism comprises an electrode stem, the bottom of the electrode stem is provided with an electrode contact, the middle position of the electrode stem is provided with a limiting block, the mounting mechanism comprises a mounting seat, and the pressing mechanism is arranged on the mounting seat. A through hole for the electrode rod to penetrate through is formed in the middle of the mounting base, the pressing mechanism comprises a positioning plate fixed to the position, close to the electrode contact, of the electrode rod, and a pressing plate located below the electrode contact is arranged on the positioning plate through a connecting assembly. According to the electrode spot welding assembly, the compressible pressing mechanism is arranged at the position, located outside the electrode contact, of the bottom of the electrode rod, stable contact between the electrode contact and a plate can be guaranteed, poor contact caused by vibration or deviation possibly generated in the welding process is avoided, and therefore the welding quality can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance welding, in particular to a spot welding electrode assembly. Background Art

[0002] Resistance welding is a method that uses the resistance heat generated by the current passing through the weldment and the contact point as a heat source to locally heat the weldment to a molten or plastic state, while applying pressure for welding. Spot welding is a type of resistance welding that uses a cylindrical electrode to form a weld between the contact surfaces of two overlapping workpieces. Electrode spot welding is widely used in the fields of automobile manufacturing, home appliance manufacturing, and electronics manufacturing.

[0003] During the spot welding process, the spot welding electrode contacts the workpiece through the electrode contact. Due to the small contact area between the electrode contact and the workpiece, a stable contact point cannot be formed between the electrode contact and the plate. The electrode will wear out during spot welding. At this time, the unstable connection between the electrode contact and the plate will cause an offset between the electrode and the plate, which in turn affects the welding quality. In addition, the electrode material will wear out if the electrode is in a high temperature and high pressure working state for a long time. The current electrode assembly is inconvenient to replace the electrode, which will increase the downtime of the production line and reduce production efficiency. Utility Model Content

[0004] The utility model aims to propose a spot welding electrode assembly to solve the problem that the connection between the existing electrode contact and the workpiece is unstable, which leads to easy deviation between the electrode and the plate during welding and further leads to poor welding quality.

[0005] In order to achieve the above purpose, the utility model adopts the following technologies:

[0006] A spot welding electrode assembly, comprising:

[0007] An electrode mechanism, the electrode mechanism comprising an electrode rod, an electrode contact is arranged at the bottom of the electrode rod, and a limit block is arranged at the middle position of the electrode rod;

[0008] The mounting mechanism comprises a mounting seat, a through hole for the electrode rod to pass through is provided in the middle of the mounting seat, and guide grooves cooperating with the limit blocks are provided at positions on both sides of the through hole on the mounting seat, the inner wall of the guide groove is recessed outward to form a mounting groove, and a positioning portion is provided inside the mounting groove;

[0009] The clamping mechanism comprises a positioning plate fixed on the electrode rod near the electrode contact, and a pressing plate located below the electrode contact is arranged on the positioning plate through a connecting component.

[0010] As a further description of the above technical solution: the connecting assembly includes a connecting tube detachably connected to the positioning plate, a connecting rod is sleeved on the bottom of the connecting tube, and a second spring is arranged between one end of the connecting rod located inside the connecting tube and the inner wall of the connecting tube.

[0011] As a further description of the above technical solution: a threaded end is arranged on the top of the connecting pipe, a nut is arranged on the threaded end, and a connecting hole matching with the threaded end is opened on the positioning plate.

[0012] As a further description of the above technical solution: the pressing plate is arranged in a ring shape, and a ring-shaped anti-slip pad is pasted on the lower side of the pressing plate.

[0013] As a further description of the above technical solution: the positioning portion includes a stopper slidably arranged in the installation groove, one end of the stopper is provided with a first spring through a connecting head, and the stopper abuts against the upper side of the limit block through the first spring.

[0014] As a further description of the above technical solution: a slide groove connected to the mounting groove is provided on the upper side of the mounting seat, and a pull plate penetrating the slide groove and extending to the top of the mounting seat is provided on the upper side of the stopper.

[0015] As a further description of the above technical solution: inspection covers are provided on both the left and right sides of the mounting seat, and one end of the first spring abuts against the inspection cover.

[0016] As a further description of the above technical solution: a cooling assembly is arranged on the electrode rod, and the cooling assembly includes a connecting seat fixed on the top of the electrode rod, a water cooling pipe is arranged at the bottom of the connecting seat, and a water pipe joint connected to the water cooling pipe is arranged on the connecting seat;

[0017] The water cooling tube is arranged in a U shape, and a water cooling channel matching with the water cooling tube is provided on the electrode rod.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0019] 1. By arranging a clamping mechanism on the electrode rod, when spot welding is performed using the electrode, the electrode contact of the electrode rod contacts the workpiece, the pressing plate abuts against the surface of the workpiece and compresses the connecting component as the electrode contact contacts the surface of the workpiece, so that the pressing plate is tightly pressed against the plate, thereby preventing the electrode contact from deviating on the plate during spot welding, ensuring the stability of the electrode contact, avoiding poor contact due to deviation during welding, and preventing the welding quality from being affected;

[0020] 2. When the electrode is worn or damaged, the worn electrode can be quickly and conveniently removed from the mounting seat by pulling the positioning part. To replace the new electrode, just insert it into the mounting seat, thereby reducing the downtime caused by replacing the electrode due to electrode wear, thereby improving production efficiency. Moreover, timely replacement of electrodes can ensure the stable quality of the welding joint and avoid the generation of defective or waste products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure schematic diagram provided according to the embodiment of the utility model is shown;

[0022] Figure 2 A partial structural schematic diagram according to an embodiment of the utility model is shown;

[0023] Figure 3 A schematic diagram of the structure of a connection assembly provided according to an embodiment of the utility model is shown;

[0024] Figure 4 A schematic diagram of the structure of a pressing plate provided according to an embodiment of the utility model is shown;

[0025] Figure 5 A schematic diagram of the connection structure between the electrode rod and the mounting base provided according to an embodiment of the utility model is shown;

[0026] Figure 6 A schematic structural diagram of a positioning portion provided according to an embodiment of the utility model is shown;

[0027] Figure 7 A schematic structural diagram of a cooling assembly provided according to an embodiment of the utility model is shown.

[0028] Legend:

[0029] 1. Electrode mechanism; 11. Electrode rod; 12. Electrode contact; 13. Limit block; 14. Cooling assembly; 141. Connecting seat; 142. Water cooling pipe; 143. Water pipe joint;

[0030] 2. Mounting mechanism; 21. Mounting seat; 22. Through hole; 23. Guide groove; 24. Mounting groove; 25. Positioning portion; 251. Stopper; 252. Connector; 253. First spring; 254. Pull plate; 26. Slide groove; 27. Inspection cover;

[0031] 3. Clamping mechanism; 31. Positioning plate; 32. Connecting assembly; 321. Connecting pipe; 322. Connecting rod; 323. Second spring; 324. Threaded end; 325. Nut; 33. Pressing plate; 331. Anti-slip pad. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-Figure 7 A spot welding electrode assembly provided in this embodiment includes an electrode mechanism 1, a mounting mechanism 2 and a clamping mechanism 3, wherein the electrode mechanism 1 includes an electrode rod 11, an electrode contact 12 is arranged at the bottom of the electrode rod 11, and a limiting block 13 is arranged in the middle position of the electrode rod 11, the mounting mechanism 2 includes a mounting seat 21, a through hole 22 for the electrode rod 11 to pass through is opened in the middle position of the mounting seat 21, and guide grooves 23 cooperating with the limiting block 13 are opened at positions on both sides of the through hole 22 on the mounting seat 21, the inner wall of the guide groove 23 is recessed outward to form a mounting groove 24, and a positioning portion 25 is arranged inside the mounting groove 24, and the clamping mechanism 3 includes a positioning plate 31 fixed on the electrode rod 11 near the electrode contact 12, and a pressing plate 33 located below the electrode contact 12 is arranged on the positioning plate 31 through a connecting component 32.

[0034] In the utility model, the electrode rod 11 of the spot welding machine is inserted into the mounting seat 21 through the through hole 22 of the mounting seat 21. When the electrode rod 11 is inserted and installed, the limit block 13 in the middle of the electrode rod 11 is aligned with the guide grooves 23 on both sides of the through hole 22. As the electrode rod 11 is inserted, the limit block 13 abuts against the bottom of the guide groove 23, and the positioning part 25 is limited to fix the electrode rod 11 on the mounting seat 21. During welding, under the driving action of the spot welding machine, the electrode contact 12 of the electrode rod 11 approaches the surface of the workpiece, and the pressing plate 33 abuts against the surface of the workpiece and compresses the connecting component 32 as the electrode contact 12 contacts the surface of the workpiece, so that the pressing plate 33 is tightly against the plate, thereby avoiding the electrode contact 12 from deflecting on the plate during spot welding, ensuring the stability of the electrode contact 12. During spot welding, the current passes through the electrode contact 12 at the bottom of the electrode rod 11 and enters the workpiece, so that part of the metal on the surface of the workpiece is melted, and the molten metal liquid causes the surfaces of the two workpieces to fuse with each other and form a strong welding point.

[0035] Among them, the limit block 13 can not only play a guiding role when the electrode rod 11 is plugged in, but also prevent the electrode rod 11 from rotating in the circumferential direction when in use, so that the electrode rod 11 can be stably installed on the mounting seat 21. When the electrode rod 11 is worn, the positioning part 25 is loosened, and then the electrode rod 11 is pulled out to remove the electrode from the mounting seat 21, thereby reducing the downtime caused by replacing the electrode due to electrode wear, thereby improving production efficiency.

[0036] Specifically, Figure 2 and Figure 3 As shown, the connecting assembly 32 includes a connecting tube 321 detachably connected to the positioning plate 31 , a connecting rod 322 is sleeved on the bottom of the connecting tube 321 , and a second spring 323 is arranged between one end of the connecting rod 322 located inside the connecting tube 321 and the inner wall of the connecting tube 321 .

[0037] Among them, the second spring 323 can realize the telescopic movement of the connecting rod 322 at the bottom of the connecting tube 321. During spot welding, as the electrode contact 12 approaches the workpiece, the pressure plate 33 contacts the workpiece first. As the electrode rod 11 moves, the pressure plate 33 squeezes the connecting component 32, so that the connecting rod 322 compresses the second spring 323 and then contracts. The compressed second spring 323 has a restoring force, so that the pressure plate 33 is tightly pressed against the workpiece, thereby preventing the electrode contact 12 from deviating on the plate during spot welding.

[0038] It should be noted that a threaded end 324 is provided at the top of the connecting tube 321, a nut 325 is provided on the threaded end 324, and a connecting hole matching the threaded end 324 is provided on the positioning plate 31. The threaded end 324 at the upper end of the connecting tube 321 passes through the connecting hole of the positioning plate 31, and then the nut 325 is screwed on the threaded end 324 so that the nut 325 is against the positioning plate 31. The threaded end 324 and the nut 325 can facilitate the installation and removal of the connecting assembly 32 on the positioning plate 31.

[0039] Specifically, Figure 2 and Figure 4 As shown, the pressing plate 33 is arranged in an annular shape, and an annular anti-skid pad 331 is attached to the lower side of the pressing plate 33. The anti-skid pad 331 can increase the friction between the pressing plate 33 and the surface of the workpiece, so that the stability of the pressing plate 33 can be improved when the pressing plate 33 abuts against the surface of the workpiece, and the sliding deviation of the pressing plate 33 can be avoided.

[0040] Specifically, Figure 5 and Figure 6 As shown, the positioning portion 25 includes a stopper 251 slidably disposed in the mounting groove 24, and one end of the stopper 251 is provided with a first spring 253 through a connector 252, and the stopper 251 abuts against the upper side of the stopper 13 through the first spring 253. The stopper 251 is wedge-shaped, and when the electrode rod 11 is inserted, as the electrode rod 11 is inserted downward, the stopper 13 presses the inclined surface of the stopper 251, and at this time, the stopper 251 is pressed into the mounting groove 24, and when the stopper 13 abuts against the bottom of the guide groove 23, the stopper 251 pops out under the action of the first spring 253 and abuts against the upper side of the stopper 13, thereby realizing the positioning and fixing of the electrode rod 11 on the mounting seat 21.

[0041] The upper side of the mounting seat 21 is provided with a slide groove 26 connected to the mounting groove 24, and the upper side of the stopper 251 is provided with a pull plate 254 that penetrates the slide groove 26 and extends to the top of the mounting seat 21. The pull plate 254 can facilitate the pulling and moving of the stopper 251. When the electrode needs to be disassembled and replaced, the stopper 251 can be retracted into the mounting groove 24 by the pull plate 254, which can more conveniently retract the stopper 251 and make the disassembly of the electrode easier.

[0042] Specifically, Figure 1 and Figure 5 As shown, inspection covers 27 are provided on both sides of the mounting seat 21, and one end of the first spring 253 abuts against the inspection cover 27. After the inspection cover 27 is removed, the mounting groove 24 is connected to the outside of the mounting seat 21, so that the positioning part 25 can be inspected and the positioning part 25 can be ensured to accurately limit and fix the electrode rod 11.

[0043] Specifically, Figure 2 , Figure 5 and Figure 7 As shown, a cooling assembly 14 is provided on the electrode rod 11, and the cooling assembly 14 includes a connecting seat 141 fixed on the top of the electrode rod 11, a water cooling pipe 142 is provided at the bottom of the connecting seat 141, and a water pipe joint 143 connected to the water cooling pipe 142 is provided on the connecting seat 141;

[0044] The water cooling tube 142 is arranged in a U shape, and a water cooling channel matching with the water cooling tube 142 is provided on the electrode rod 11 .

[0045] Among them, the water pipe joint 143 is connected to the circulating water pipe of the circulating water mechanism, so that cooling water can be introduced into the water cooling pipe 142. The circulating cooling water can take away the heat generated during the welding process to extend the service life of the electrode. The water cooling channel can ensure that the water cooling pipe 142 is cooled in the electrode rod 11. The mounting seat 21 can be installed and connected to the electric welding machine using the connecting hole, so that the workpiece can be spot welded through the electrode.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A spot welding electrode assembly, characterized in that: include: An electrode mechanism (1), the electrode mechanism (1) comprising an electrode rod (11), an electrode contact (12) being arranged at the bottom of the electrode rod (11), and a limit block (13) being arranged at the middle position of the electrode rod (11); A mounting mechanism (2), the mounting mechanism (2) comprising a mounting seat (21), a through hole (22) for the electrode rod (11) to pass through being provided in the middle of the mounting seat (21), and guide grooves (23) cooperating with the limit blocks (13) are provided at positions on both sides of the through hole (22) on the mounting seat (21), the inner wall of the guide groove (23) is recessed outward to form a mounting groove (24), and a positioning portion (25) is provided inside the mounting groove (24); A clamping mechanism (3), the clamping mechanism (3) comprising a positioning plate (31) fixed on the electrode rod (11) near the electrode contact (12), the positioning plate (31) being provided with a pressing plate (33) located below the electrode contact (12) via a connecting assembly (32).

2. A spot welding electrode assembly according to claim 1, characterized in that: The connection assembly (32) comprises a connection tube (321) detachably connected to the positioning plate (31); a connection rod (322) is sleeved on the bottom of the connection tube (321); and a second spring (323) is provided between one end of the connection rod (322) located inside the connection tube (321) and the inner wall of the connection tube (321).

3. A spot welding electrode assembly according to claim 2, characterized in that: A threaded end (324) is provided at the top of the connecting pipe (321), a nut (325) is provided on the threaded end (324), and a connecting hole matching the threaded end (324) is provided on the positioning plate (31).

4. A spot welding electrode assembly according to claim 1, characterized in that: The pressing plate (33) is arranged in a ring shape, and a ring-shaped anti-slip pad (331) is adhered to the lower side of the pressing plate (33).

5. A spot welding electrode assembly according to claim 1, characterized in that: The positioning portion (25) comprises a stopper (251) slidably disposed in the mounting groove (24); one end of the stopper (251) is provided with a first spring (253) via a connector (252); and the stopper (251) abuts against an upper side surface of the limiting block (13) via the first spring (253).

6. A spot welding electrode assembly according to claim 5, characterized in that: The upper side surface of the mounting seat (21) is provided with a slide groove (26) connected to the mounting groove (24), and the upper side surface of the stopper (251) is provided with a pull plate (254) penetrating the slide groove (26) and extending to the top of the mounting seat (21).

7. A spot welding electrode assembly according to claim 5, characterized in that: Inspection covers (27) are provided on both left and right sides of the mounting seat (21), and one end of the first spring (253) abuts against the inspection cover (27).

8. A spot welding electrode assembly according to claim 1, characterized in that: The electrode rod (11) is provided with a cooling assembly (14), the cooling assembly (14) comprising a connecting seat (141) fixed to the top of the electrode rod (11), a water cooling pipe (142) being provided at the bottom of the connecting seat (141), and a water pipe joint (143) connected to the water cooling pipe (142) being provided on the connecting seat (141); The water cooling tube (142) is arranged in a U shape, and a water cooling channel matching the water cooling tube (142) is provided on the electrode rod (11).

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