Combined electrode for projection welding machine

Abstract

The utility model relates to the technical field of projection welding machines, in particular to a combined electrode for a projection welding machine, which comprises an electrode holder, a locking ring and an electrode plate. The electrode plate is in a T shape, the locking ring is of a cylindrical structure with internal threads, an annular flange is arranged on the inner side of the bottom end of the cylindrical structure, the inner diameter of the annular flange is larger than the outer diameter of the rod portion of the electrode plate and smaller than the outer diameter of the head portion of the electrode plate, and the outer side of the head portion of the electrode plate is in lap joint with the upper portion of the annular flange. The rod part of the electrode plate extends out of the bottom end of the locking ring; one end of the electrode holder is in threaded connection with the interior of the locking ring, and the lower surface of the electrode holder is attached to the upper surface of the electrode plate, so that the electrode plate is pressed and fixed on the locking ring; by adopting the combined electrode, only the electrode plate needs to be replaced after the service life of the electrode is up, the electrode consumption cost in projection welding is greatly reduced, the electrode plate can be easily replaced only by manually unscrewing the locking ring during replacement, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of projection welding machines, in particular to a combined electrode used for projection welding machines. Background Art

[0002] With the rapid development of the automotive industry, projection welding is widely used in automobile body-in-white welding. Projection welding electrodes play a key role in projection welding. In production, projection welding electrodes are also consumable parts. The consumption of electrodes accounts for a large proportion of cost losses. Replacing electrodes is also cumbersome. After replacement, indentation testing is required. Electrode replacement takes up a certain amount of production time, consumes a lot of labor, and is inefficient. Utility Model Content

[0003] In view of the above-mentioned problems, the present invention provides a combined electrode for a projection welding machine to solve the problem of time-consuming and labor-intensive electrode replacement in projection welding in the prior art.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A combined electrode for a projection welding machine, comprising an electrode holder, a locking ring and an electrode sheet;

[0006] The electrode sheet is T-shaped, and includes a head portion and a rod portion located on the lower surface of the head portion;

[0007] The locking ring is a cylindrical structure with an internal thread, and an annular flange is provided on the inner side of the bottom end of the cylindrical structure. The inner diameter of the annular flange is larger than the outer diameter of the stem of the electrode sheet and smaller than the outer diameter of the head of the electrode sheet. The outer side of the head of the electrode sheet overlaps the top of the annular flange, and the stem of the electrode sheet extends from the bottom end of the locking ring.

[0008] One end of the electrode seat is threadedly connected to the locking ring, and the lower surface of the electrode seat is in contact with the upper surface of the electrode sheet.

[0009] In some embodiments, the end of the electrode holder that is not connected to the locking ring is tapered, and the tapered end of the electrode holder is connected to the lower electrode rod of the projection welding machine.

[0010] In some embodiments, a cooling water ring is provided on the outer side of one end of the lower electrode rod connected to the electrode holder.

[0011] In some embodiments, the cooling water ring is fixed to the lower electrode rod by threads.

[0012] In some embodiments, the lower electrode rod is provided with an air blowing joint that is in communication with the inner cavity of the lower electrode rod, and the air blowing joint is provided adjacent to the cooling water ring.

[0013] In some embodiments, the locking ring is made of stainless steel.

[0014] In some embodiments, the locking ring is an integral structure.

[0015] Compared with the prior art, the above utility model has at least one of the following advantages or beneficial effects:

[0016] The utility model discloses a combined electrode for a projection welding machine, in which the electrode sheet and the electrode holder are detachably connected together by a locking ring, so that after the service life of the electrode is reached, only the electrode sheet needs to be replaced, which greatly reduces the cost of electrode consumption in projection welding. When replacing, the electrode sheet can be easily replaced by manually unscrewing the locking ring. The operation is simple and convenient, and the electrode sheet can be quickly replaced, which reduces the replacement time. Therefore, the consumption of the electrode is changed from consuming the entire electrode to consuming only the electrode sheet at the front end, which greatly saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention and its features, configurations, and advantages will become more apparent upon reading the detailed description of the non-limiting embodiments described below with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not necessarily drawn to scale, with emphasis placed on illustrating the subject matter of the present invention.

[0018] Figure 1 This is a schematic structural diagram of a combined electrode for a projection welding machine according to an embodiment of the present invention;

[0019] Figure 2 This is an exploded schematic diagram of a combined electrode for a projection welding machine according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the application of a combined electrode for a projection welding machine in an embodiment of the present utility model;

[0021] Among them, 1 is a combined electrode; 11 is an electrode holder; 12 is an electrode sheet; 13 is a locking ring; 131 is an annular flange; 2 is a lower electrode rod; 3 is a cooling water ring; and 4 is an air blowing joint. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0023] like Figures 1 to 3As shown, the utility model discloses a combined electrode 1 for a projection welding machine, the combined electrode 1 includes an electrode holder 11, a locking ring 13 and an electrode sheet 12; the electrode sheet 12 is T-shaped, and includes a head and a rod located on the lower surface of the head; the locking ring 13 is a cylindrical structure with an internal thread (the internal thread is adapted to the external thread on the electrode holder 11), and an annular flange 131 is provided on the inner side of the bottom end of the cylindrical structure, and the inner diameter of the annular flange 131 is larger than the rod of the electrode sheet. The outer diameter of the head of the electrode sheet 12 is smaller than the outer diameter of the head of the electrode sheet, the outer side of the head of the electrode sheet 12 is overlapped above the annular flange 131, and the rod of the electrode sheet 12 extends from the bottom end of the locking ring 13; one end of the electrode holder 11 is threadedly connected to the locking ring 13, and the lower surface of the electrode holder 11 fits with the upper surface of the electrode sheet 12. The electrode holder 11 presses and fixes the electrode sheet 12 on the locking ring 13. The locking ring 13 is made of stainless steel (SUS304) and is an integrated structure.

[0024] Specifically, the end of the electrode holder that is not connected to the locking ring 13 is conical, and the conical end of the electrode holder 11 is connected to the lower electrode rod 2 of the projection welding machine (that is, the electrode holder 11 is connected to the lower electrode rod 2 of the projection welding machine through a taper), and a cooling water ring 3 is provided on the outer side of the end of the lower electrode rod 2 connected to the electrode holder 11; the cooling water ring 3 is fixed to the lower electrode rod 2 by threads; the lower electrode rod 2 is provided with a blowing joint 4 that is connected to the inner cavity of the lower electrode rod 2, and the blowing joint 4 is arranged adjacent to the cooling water ring 3.

[0025] When assembling the above-mentioned combined electrode 1, first put the electrode sheet 12 into the locking ring 13 from the upper mouth of the locking ring 13, and the head of the electrode sheet 12 overlaps the annular flange 131 of the locking ring 13 so that the electrode sheet 12 will not fall out of the locking ring 13, and then tighten the locking ring 13 to fix it on the electrode holder 11, and make the electrode holder 11 fit with the electrode sheet 12 to lock the electrode sheet 12; when the electrode sheet 12 needs to be replaced, it is only necessary to manually rotate the locking ring 13 to unscrew the locking ring 13 from the electrode holder 11, and then take out the electrode sheet 12 from the locking ring 13, replace it with a new electrode sheet 12, and then assemble it. The replacement is very convenient.

[0026] In summary, the combined electrode for the projection welding machine disclosed in the utility model adopts this combined electrode. When the electrode life is reached during the projection welding process, only the electrode sheet needs to be replaced, and there is no need to replace the entire electrode, thereby greatly reducing the cost of electrode consumption in projection welding. During electrode replacement, the electrode sheet can be easily replaced by manually loosening the locking ring, which is simple and convenient to operate.

[0027] Those skilled in the art should understand that they can implement variations based on the prior art and the above embodiments, which will not be described in detail here. Such variations do not affect the essence of the present invention and will not be described in detail here.

[0028] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A combined electrode for a projection welding machine, characterized in that: The combined electrode comprises an electrode holder, a locking ring and an electrode sheet; The electrode sheet is T-shaped, and includes a head portion and a rod portion located on the lower surface of the head portion; The locking ring is a cylindrical structure with an internal thread, and an annular flange is provided on the inner side of the bottom end of the cylindrical structure. The inner diameter of the annular flange is larger than the outer diameter of the stem of the electrode sheet and smaller than the outer diameter of the head of the electrode sheet. The outer side of the head of the electrode sheet overlaps the top of the annular flange, and the stem of the electrode sheet extends from the bottom end of the locking ring. One end of the electrode seat is threadedly connected to the locking ring, and the lower surface of the electrode seat is in contact with the upper surface of the electrode sheet.

2. The combined electrode for a projection welding machine according to claim 1, wherein: The end of the electrode holder that is not connected to the locking ring is tapered, and the tapered end of the electrode holder is connected to the lower electrode rod of the projection welding machine.

3. The combined electrode for a projection welding machine according to claim 2, wherein: A cooling water ring is sleeved on the outer side of one end of the lower electrode rod connected to the electrode seat.

4. The combined electrode for a projection welding machine according to claim 3, wherein: The cooling water ring is fixed on the lower electrode rod through threads.

5. The combined electrode for a projection welding machine according to claim 3, wherein: The lower electrode rod is provided with an air blowing joint which is in communication with the inner cavity of the lower electrode rod, and the air blowing joint is arranged adjacent to the cooling water ring.

6. The combined electrode for a projection welding machine according to claim 1, wherein: The locking ring is made of stainless steel.

7. The combined electrode for a projection welding machine according to claim 1, wherein: The locking ring is an integrated structure.

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