Projection welding electrode structure

Abstract

This utility model relates to a projection welding electrode structure in the field of projection welding. It solves the problem that when projecting bolts (nuts) onto the side of U-shaped products using existing medium-frequency projection welding machines, the installation faces the machine side, making it difficult for operators to observe the positioning and installation of standard parts, and hindering the verification of proper installation of nuts and bolts, thus complicating operation. The technical features include: a medium-frequency projection welding machine and a workpiece; it also includes: an upper electrode assembly mounted on the upper electrode of the medium-frequency projection welding machine and a lower electrode assembly mounted on the lower electrode of the medium-frequency projection welding machine; the upper electrode assembly includes: an L-shaped upper electrode holder connected to the upper electrode of the medium-frequency projection welding machine and a projection welding upper electrode mounted on the L-shaped upper electrode holder. The L-shaped upper electrode holder has a built-in cooling water channel to directly cool the welding contact area. Combined with an all-chromium zirconium copper electrode system, the structure is relatively simple and easy to use.

Description

Technical Field

[0001] This utility model relates to the field of projection welding technology, and in particular to a projection welding electrode structure. Background Technology

[0002] Welding of automotive parts is a core technology in automobile manufacturing, involving the connection of various processes and different materials. It is generally divided into resistance spot welding, laser welding, arc welding, ultrasonic welding, etc.

[0003] In automotive parts welding, U-shaped products with projection welding on the side walls are more common.

[0004] When using existing medium-frequency projection welding machines to project bolts (nuts) onto the side of U-shaped products, the installation faces the medium-frequency projection welding machine side, making it difficult for manual observation of the positioning and standard parts installation. It is also difficult to observe whether the nuts and bolts are installed in place, which is not conducive to operation. Therefore, it is necessary to design a projection welding electrode structure to solve this problem. Utility Model Content

[0005] This utility model aims to solve the technical problem in the existing medium-frequency projection welding machine that, when projecting bolts (nuts) onto the side of U-shaped products, the installation faces the medium-frequency projection welding machine side, making it difficult for manual observation of the positioning and standard parts installation, and making it difficult to observe whether the nuts and bolts are installed in place, which is not conducive to operation. The present invention provides a projection welding electrode structure.

[0006] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0007] A projection welding electrode structure, comprising:

[0008] Medium frequency projection welding machine and workpiece;

[0009] Also includes:

[0010] The upper electrode assembly installed on the upper electrode of the medium frequency projection welding machine and the lower electrode assembly installed on the lower electrode of the medium frequency projection welding machine;

[0011] The upper electrode assembly includes: an L-shaped upper electrode gripping rod connected to the upper electrode of the medium frequency projection welding machine, and a projection welding upper electrode mounted on the L-shaped upper electrode gripping rod;

[0012] The lower electrode assembly includes: a lower electrode grip rod connected to the lower electrode of the medium frequency projection welding machine, a projection welding lower electrode mounted on the lower electrode grip rod, a positioning pin mounted on the projection welding lower electrode, and a projection welding bolt insulating sleeve fitted on the positioning pin.

[0013] The upper projection electrode, lower projection electrode, and projection bolt insulating sleeve are located near the inside of the medium-frequency projection welding machine. The L-shaped upper electrode handle can drive the upper projection electrode to move downward, thereby completing the welding.

[0014] Preferably, the L-shaped upper electrode grip has a water channel inside, and the L-shaped upper electrode grip is cooled during welding through the internal water channel.

[0015] Preferably, the L-shaped upper electrode grip is a chromium-zirconium-copper upper electrode grip.

[0016] Preferably, the positioning pin is a KCF positioning pin.

[0017] Preferably, the projection weld bolt insulating sleeve is a KCF projection weld bolt insulating sleeve.

[0018] Preferably, the lower electrode grip is a chromium-zirconium-copper lower electrode grip.

[0019] Preferably, the projection-welded upper electrode is connected to the L-shaped upper electrode handle, and the projection-welded upper electrode is a chromium-zirconium-copper projection-welded upper electrode.

[0020] Preferably, the projection welding lower electrode matches the positioning pin, and the projection welding lower electrode is a chromium-zirconium-copper projection welding lower electrode.

[0021] Preferably, the projection welding upper electrode and the positioning pin are close to the inside of the medium frequency projection welding machine.

[0022] This utility model has the following beneficial effects:

[0023] This projection welding electrode structure is convenient to operate and improves operator productivity. The installation method facilitates observation of positioning and whether standard parts are installed correctly, reducing scrap due to improper installation. By centrally placing the upper and lower projection welding electrodes and the projection welding bolt insulating sleeve inside the medium-frequency projection welding machine, combined with the movable design of the L-shaped upper electrode handle, the operator can clearly confirm from the outside whether the bolts / nuts on the positioning pins are installed correctly. This completely solves the blind spot problem caused by component obstruction in traditional structures, reducing the rate of human error. The combination design of KCF positioning pins and projection welding bolt insulating sleeves ensures precise alignment of the bolts / nuts with the workpiece projection points, preventing welding misalignment. The insulating sleeve effectively isolates the welding current, preventing shunting and resulting in incomplete welds or workpiece damage. The L-shaped upper electrode handle has a built-in cooling water channel to directly cool the welding contact area. Combined with the all-chromium zirconium copper electrode system, the structure is relatively simple and easy to use. Attached Figure Description

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Figure 1 This is a schematic diagram of a projection welding electrode structure according to the present invention;

[0026] Figure 2 This is a partial schematic diagram of a projection welding electrode structure according to the present invention.

[0027] The reference numerals in the figure are:

[0028] Medium frequency projection welding machine 1, workpiece 2, upper electrode assembly 3, lower electrode assembly 4;

[0029] L-shaped upper electrode grip 31, projection welded upper electrode 32;

[0030] Lower electrode grip 41, projection welded lower electrode 42, positioning pin 43, projection welded bolt insulating sleeve 44. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-2 A projection welding electrode structure includes: a medium-frequency projection welding machine 1 and a workpiece 2, and further includes: an upper electrode assembly 3 mounted on the upper electrode of the medium-frequency projection welding machine 1 and a lower electrode assembly 4 mounted on the lower electrode of the medium-frequency projection welding machine 1. The upper electrode assembly 3 includes: an L-shaped upper electrode handle 31 connected to the upper electrode of the medium-frequency projection welding machine 1 and a projection welding upper electrode 32 mounted on the L-shaped upper electrode handle 31. The lower electrode assembly 4 includes: a lower electrode handle 41 connected to the lower electrode of the medium-frequency projection welding machine 1, a projection welding lower electrode 42 mounted on the lower electrode handle 41, a positioning pin 43 mounted on the projection welding lower electrode 42, and a projection welding bolt insulating sleeve 44 fitted on the positioning pin 43. The projection welding upper electrode 32, the projection welding lower electrode 42, and the projection welding bolt insulating sleeve 44 are close to the inside of the medium-frequency projection welding machine 1. The L-shaped upper electrode handle 31 can drive the projection welding upper electrode 32 to move downward, thereby completing the welding.

[0033] The L-shaped upper electrode holder 31 has a water channel inside, which is used to cool the L-shaped upper electrode holder 31 during welding.

[0034] The L-shaped upper electrode grip 31 is a chromium-zirconium-copper upper electrode grip.

[0035] Positioning pin 43 is a KCF positioning pin.

[0036] The projection weld bolt insulating sleeve 44 is a KCF projection weld bolt insulating sleeve.

[0037] The lower electrode grip 41 is a chromium-zirconium-copper lower electrode grip.

[0038] The projection-welded upper electrode 32 is connected to the L-shaped upper electrode handle 31. The projection-welded upper electrode 32 is a chromium-zirconium-copper projection-welded upper electrode.

[0039] The projection welding lower electrode 42 is matched with the positioning pin 43, and the projection welding lower electrode 42 is a chromium zirconium copper projection welding lower electrode.

[0040] The projection welding upper electrode 32 and the positioning pin 43 are close to the inside of the medium frequency projection welding machine 1.

[0041] The lower electrode grip 41 is vertically locked to the lower electrode seat of the projection welding machine. The projection welding lower electrode 42 is installed on the top of the grip and fixed by threads. The KCF locating pin 43 is pressed into the center hole of the projection welding lower electrode through an interference fit. The projection welding bolt insulating sleeve 44 is fitted into the locating pin. The horizontal section of the L-shaped upper electrode grip 31 is fixed to the upper electrode seat of the projection welding machine. The projection welding upper electrode 32 is installed at the end of the vertical section of the grip through a conical fit, with the spherical surface of the projection welding upper electrode 32 facing downwards. The cooling water circuit is connected, with the water inlet pipe connected to the top port of the L-shaped upper electrode grip 31 and the water outlet pipe connected to the cooling water circuit. When welding the side port of the pipe, the U-shaped workpiece 2 is placed on the platform of the projection welding lower electrode 42, with the side wall close to the positioning block. The bolt is put into the projection welding bolt insulating sleeve 44. Visually confirm that the bolt head is completely in contact with the end face of the projection welding bolt insulating sleeve 44. Start the projection welding machine. The L-shaped upper electrode handle 31 drives the projection welding upper electrode 32 to press down. The spherical surface of the projection welding upper electrode presses the bolt head. The projection welding bolt insulating sleeve 44 prevents the current from being diverted to the positioning pin 43. After welding is completed, the cooling water circuit works synchronously. The L-shaped upper electrode handle 31 retracts and the workpiece is removed, which is very convenient.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A projection welding electrode structure, comprising: Medium frequency projection welding machine (1) and workpiece (2); Its characteristic is that it further includes: The upper electrode assembly (3) is installed on the upper electrode of the medium frequency projection welding machine (1) and the lower electrode assembly (4) is installed on the lower electrode of the medium frequency projection welding machine (1); The upper electrode assembly (3) includes: an L-shaped upper electrode grip (31) connected to the upper electrode of the medium frequency projection welding machine (1) and a projection welding upper electrode (32) mounted on the L-shaped upper electrode grip (31); The lower electrode assembly (4) includes: a lower electrode grip (41) connected to the lower electrode of the medium frequency projection welding machine (1), a projection welding lower electrode (42) mounted on the lower electrode grip (41), a positioning pin (43) mounted on the projection welding lower electrode (42), and a projection welding bolt insulating sleeve (44) fitted on the positioning pin (43). The upper projection electrode (32), lower projection electrode (42), and projection bolt insulating sleeve (44) are located near the inside of the medium frequency projection welding machine (1). The L-shaped upper electrode grip (31) can drive the upper projection electrode (32) to move downward, thereby completing the welding.

2. A projection welding electrode structure according to claim 1, wherein The L-shaped upper electrode grip (31) is provided with a water channel inside, and the L-shaped upper electrode grip (31) is cooled during welding through the internal water channel.

3. A projection welding electrode structure according to claim 1, wherein The L-shaped upper electrode grip (31) is a chromium-zirconium-copper upper electrode grip.

4. A projection welding electrode structure according to claim 1, wherein The positioning pin (43) is a KCF positioning pin.

5. A projection welding electrode structure according to claim 1, wherein The projection weld bolt insulating sleeve (44) is a KCF projection weld bolt insulating sleeve.

6. The projection welding electrode structure according to claim 1, characterized in that, The lower electrode grip (41) is a chromium-zirconium-copper lower electrode grip.

7. The projection welding electrode structure according to claim 1, characterized in that, The projection welding upper electrode (32) is connected to the L-shaped upper electrode handle (31), and the projection welding upper electrode (32) is a chromium zirconium copper projection welding upper electrode.

8. The projection welding electrode structure according to claim 1, characterized in that, The projection welding lower electrode (42) is matched with the positioning pin (43), and the projection welding lower electrode (42) is a chromium zirconium copper projection welding lower electrode.

9. The projection welding electrode structure according to claim 1, characterized in that, The projection welding upper electrode (32) and the positioning pin (43) are close to the inside of the medium frequency projection welding machine (1).

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