Argon arc welding device for metal piece processing

Abstract

This invention relates to the field of welding equipment technology, specifically to an argon arc welding device for metal parts processing, comprising a welding torch rod, a flow guide installed at the head of the welding torch rod, a ceramic nozzle installed on the flow guide, a tungsten needle clamp installed inside the flow guide, a tungsten electrode penetrating inside the tungsten needle clamp, and a pressure cap installed at the tail of the welding torch rod. A spring is installed between the tungsten needle clamp and the flow guide. The welding torch rod has a sliding hole, and the end of the tungsten needle clamp slides axially within the sliding hole. The pressure cap has a threaded blind hole, and a contact member is threadedly connected to the threaded blind hole. The end of the contact member has a non-circular blind hole, and a hollow member is axially slidably installed within the non-circular blind hole. The end of the hollow member is fixedly connected to the end of the tungsten needle clamp. The end of the pressure cap is axially slidably connected to the sliding hole. A snap-fit ​​member is fixedly installed at the end of the pressure cap, and a snap-fit ​​groove that mates with the snap-fit ​​member is provided on the welding torch rod.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to an argon arc welding device for metal parts processing. Background Technology

[0002] Argon arc welding is a welding technique that uses argon gas as a shielding gas. Based on the principle of ordinary electric arc welding, it utilizes argon gas to protect the metal welding material. A high current is used to melt the welding material into a liquid state on the substrate to form a molten pool, enabling the welded metal and welding material to achieve metallurgical bonding. Argon gas is continuously supplied during the high-temperature molten welding process, preventing the welding material from coming into contact with oxygen in the air and thus preventing oxidation. Therefore, it can be used to weld stainless steel and ferrous metals.

[0003] The most important part of the argon arc welding equipment is the welding torch. The welding torch is used to hold the tungsten electrode and guide the argon gas. When welding with the welding torch, the angle between the plates being welded may change. Sometimes different ceramic nozzles need to be replaced, and sometimes the length of the tungsten electrode extending out of the welding torch needs to be roughly adjusted to ensure that the tungsten electrode is always between the two plates to melt the welding wire and the base material.

[0004] In existing welding torches, when adjusting the length of the tungsten electrode extension, the ceramic nozzle is first unscrewed, and then the flow guide is loosened so that the flow guide no longer works with the pressure cap to compress and deform the tungsten needle clamp. After the tungsten needle clamp no longer clamps the tungsten electrode, a tool is used to clamp the tungsten electrode and roughly pull it out or insert it into the welding torch for a certain length. The operation is quite cumbersome and troublesome.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to design an argon arc welding device that allows for rapid adjustment of the tungsten electrode extension length from the welding torch without removing the ceramic nozzle or loosening the flow guide, thereby addressing the aforementioned shortcomings in the technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an argon arc welding device for metal parts processing, comprising a welding torch rod, a flow guide installed at the head of the welding torch rod, a ceramic nozzle installed on the flow guide, a tungsten needle clip installed inside the flow guide, a tungsten electrode penetrating inside the tungsten needle clip, and a pressure cap installed at the tail of the welding torch rod. A spring is installed between the tungsten needle clip and the flow guide. The welding torch rod has a sliding hole. The end of the tungsten needle clip slides axially within the sliding hole. The pressure cap has a threaded blind hole. A contact member is threadedly connected to the threaded blind hole. A non-circular blind hole is opened at the end of the contact member. A hollow member is axially slidably installed within the non-circular blind hole. The end of the hollow member is fixedly connected to the end of the tungsten needle clip. The end of the pressure cap is axially slidably connected to the sliding hole. A snap fastener is fixedly installed at the end of the pressure cap. A snap groove that mates with the snap fastener is opened on the welding torch rod.

[0008] By pulling the pressure cap out of the welding torch rod, the spring separates the tungsten needle clamp and the flow guide, thus no longer clamping the tungsten electrode. Rotating the pressure cap clockwise or counterclockwise allows the tungsten electrode to extend or retract into the welding torch rod. Pushing the pressure cap back into the welding torch rod allows the tungsten needle clamp to re-clamp the tungsten electrode.

[0009] Preferably, both the end of the tungsten needle clamp and the sliding hole are designed as mutually cooperating polygons, which can restrict the tungsten needle clamp from rotating circumferentially within the sliding groove.

[0010] Preferably, the outer circumferential surface of the end of the pressure cap inserted into the sliding hole is circular, the cross-section of the non-circular blind hole is polygonal, and the hollow part does not contact the inner circumferential surface of the pressure cap, so as to avoid the pressure cap colliding with the hollow part and the sliding hole when rotating.

[0011] Preferably, the distance between the end of the hollow component and the end of the threaded blind hole is less than the length of the abutment component, to prevent the hollow component from not being inserted into the abutment component.

[0012] Preferably, the fastener includes multiple connecting rods fixedly installed at the end of the pressure cap, and multiple connecting blocks fixedly installed on opposite sides of the connecting rods.

[0013] Preferably, the snap-fit ​​groove includes an annular groove formed on the welding torch rod, a splitting groove formed on one side of the annular groove, and an L-shaped groove formed on the other side of the annular groove. The number and position of the L-shaped groove and the splitting groove are matched with the connecting block.

[0014] Preferably, a first sealing plate is provided between the welding torch rod and the ceramic nozzle, and the flow guide passes through the first sealing plate for sealing between the ceramic nozzle and the welding torch rod.

[0015] Preferably, a second sealing plate is provided between the plurality of connecting rods, and one end of the pressure cap inserted into the sliding hole passes through the second sealing plate, which is used to seal the welding torch rod when the pressure cap presses against the tungsten needle clamp.

[0016] Preferably, the diameter of the tungsten electrode is smaller than the inner diameter of the hollow component, so that the tungsten electrode does not come into contact with the hollow component, ensuring that the tungsten electrode does not collide with the hollow component when the diameter of the tungsten electrode is changed.

[0017] Preferably, the size of the portion of the tungsten needle clip located inside the sliding hole is larger than the size of the portion located inside the flow guide. The adjacent ends of the flow guide and the tungsten needle clip are respectively in contact with the two ends of the spring. The spring is used to apply an elastic force to the tungsten needle clip away from the flow guide. The pressure cap can be made of a transparent material to ensure that the movement distance of the internal contacting member can be seen when the pressure cap is rotated.

[0018] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0019] This invention allows the tungsten electrode to automatically extend or retract into the welding gun rod by rotating the pressure cap clockwise or counterclockwise after pulling the pressure cap away from the welding gun rod to a certain distance. Compared with the prior art, which first removes the ceramic nozzle from the guide, then loosens the guide to prevent deformation of the tungsten needle clamp, and finally pulls out or pushes the tungsten electrode into the welding gun rod, this invention is simple to operate and can be adjusted quickly.

[0020] This invention automatically drives the tungsten needle clamp to clamp the tungsten electrode by inserting the connecting block on the pressure cap into the L-shaped groove. When the connecting block is passed through the split groove, the pressure cap can be removed from the welding torch rod. This allows the tail end of the tungsten electrode with a relatively low temperature to be clamped and removed from the tail end of the welding torch rod, without having to clamp the head of the tungsten electrode with a higher temperature.

[0021] Meanwhile, when adjusting the length of the tungsten electrode extending out of the welding torch rod, the present invention does not require tools to clamp the tungsten electrode. It can be adjusted directly after welding, without having to wait for the ceramic nozzle and flow guide to cool down before operation, as is done in the prior art. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the disassembled parts of the present invention;

[0025] Figure 3 This is a schematic diagram showing the disassembled welding torch rod and pressure cap of the present invention;

[0026] Figure 4 This is a cross-sectional view of the present invention;

[0027] Figure 5 This is a cross-sectional view of the welding torch rod and ceramic nozzle of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Welding torch rod; 2. Flow guide; 3. Ceramic nozzle; 4. Tungsten needle clip; 5. Tungsten electrode; 6. Pressure cap; 7. Spring; 8. Sliding hole; 9. Threaded blind hole; 10. Abutting part; 11. Non-circular blind hole; 12. Hollow part; 13. Clip-on part; 13a. Connecting rod; 13b. Connecting block; 14. Clip-on groove; 14a. Circular groove; 14b. Splitting groove; 14c. L-shaped groove; 15. First sealing plate; 16. Second sealing plate. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] This invention provides, for example Figure 1-5The illustrated argon arc welding apparatus for metal part processing includes a welding torch rod 1, a flow guide 2, a ceramic nozzle 3, a tungsten needle clip 4, a tungsten electrode 5, and a pressure cap 6, as per existing technology. The flow guide 2 is threaded to the head of the welding torch rod 1. A polygonal sliding hole 8 is formed inside the welding torch rod 1. A spring 7 is inserted into the sliding hole 8. Then, the tungsten needle clip 4 is inserted from the tail of the welding torch rod 1 into the sliding hole 8, the spring 7, and the flow guide 2. The length of the tungsten needle clip 4 is greater than that of the flow guide 2. However, to ensure that the tungsten needle clip 4 can move axially as required, the portion of the tungsten needle clip 4 protruding from the flow guide 2 is changed from a circle to a polygon that mates with the sliding hole 8. The end of the pressure cap 6 is not connected by a thread as in existing technology; instead, the end of the pressure cap 6 is directly inserted into the sliding hole 8, so that the end of the pressure cap 6... The tungsten electrode 5 is inserted into the tungsten needle clip 4, fitting snugly against the end of the tungsten needle clip 4. To facilitate adjustment of the extension length of the tungsten electrode 5 without removing the ceramic nozzle 3 or loosening the guide 2, a threaded blind hole 9 is provided at the end of the pressure cap 6. A contact element 10 is threadedly connected to the threaded blind hole 9, and a non-circular blind hole 11 is provided near the end of the welding torch rod 1 within the contact element 10. A hollow component 12, fixedly connected to the end of the tungsten needle clip 4, is slidably installed within the non-circular blind hole 11. When the pressure cap 6 is rotated, the sliding hole 8 restricts the rotation of the tungsten needle clip 4, which in turn restricts the rotation of the hollow component 12. The hollow component 12, through the non-circular blind hole 11, restricts the rotation of the contact element 10. Therefore, the contact element 10 will move axially due to the threaded connection between its outer circumference and the threaded blind hole 9. The tungsten electrode 5, which is in contact with the inner end of the contact member 10, will be pushed out into the welding torch rod 1. When rotating in the reverse direction, simply hold the welding torch rod 1 with the tungsten electrode 5 facing upwards. This will ensure that the end of the tungsten electrode 5 remains in contact with the contact member 10 under the action of gravity, thus gradually retracting into the welding torch rod 1. This allows adjustment of the length of the tungsten electrode 5 when it extends. However, to achieve this, it is necessary to ensure that the tungsten needle clamp 4 does not clamp the tungsten electrode 5, that is, the spring 7 is in an uncompressed state, and the guide member 2 does not compress the end of the tungsten needle clamp 4 to generate clamping force. For this purpose, we have fixedly installed multiple latching members 13 composed of connecting rods 13a and connecting blocks 13b at the end of the pressure cap 6, and opened latching grooves 14 composed of annular grooves 14a, multiple splitting grooves 14b, and multiple L-shaped grooves 14c on the welding torch rod 1. When the connecting block 13b is located in the L-shaped groove 14c, the end of the pressure cap 6 presses the tungsten needle clamp 4 into the guide member 2 and compresses the spring 7. At this time, the tungsten electrode 5 is clamped by the tungsten needle clamp 4. When the connecting block 13b is screwed into the annular groove 14a, the spring 7 pushes the tungsten needle clamp 4 out of the guide member 2 a certain distance through the elastic force. At this time, the tungsten needle clamp 4 no longer clamps the tungsten electrode 5. When the pressure cap 6 is rotated, the pressure cap 6 will drive the connecting block 13b to rotate in the annular groove 14a through the connecting rod 13a without being affected. When it is necessary to replace the tungsten electrode 5 of different thicknesses, the connecting block 13b can be directly removed from the split groove 14b, and the pressure cap 6 can be removed from the welding gun rod 1. The tungsten electrode 5 can be pulled out, the new tungsten electrode 5 can be inserted into the tungsten electrode clamp, and then the pressure cap 6 can be reversed to reset the above steps.

[0033] Here is a general description of the operation process: With the tungsten electrode 5 facing upwards, rotate and pull the pressure cap 6 to allow the connecting block 13b to enter the annular groove 14a from the L-shaped groove 14c. Then, rotate the pressure cap 6 clockwise or counterclockwise to extend or retract the tungsten electrode 5 into the welding torch rod 1. When reversing the operation to re-engage the connecting block 13b on the pressure cap 6 into the L-shaped groove 14c, the tungsten needle clamp 4 will clamp the tungsten electrode 5. When the tungsten electrode 5 needs to be replaced, remove the pressure cap 6, pass the connecting block 13b through the split groove 14b, then pull out the tungsten electrode 5, insert the new tungsten electrode 5, and reset the pressure cap 6.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application.

Claims

1. An argon arc welding apparatus for metal part processing, comprising a welding torch rod (1), a flow guide (2) mounted on the head of the welding torch rod (1), a ceramic nozzle (3) mounted on the flow guide (2), a tungsten needle clip (4) mounted inside the flow guide (2), a tungsten electrode (5) penetrating inside the tungsten needle clip (4), and a pressure cap (6) mounted on the tail of the welding torch rod (1), characterized in that: A spring (7) is installed between the tungsten needle clamp (4) and the guide (2). The welding torch rod (1) has a sliding hole (8). The end of the tungsten needle clamp (4) slides axially within the sliding hole (8). The pressure cap (6) has a threaded blind hole (9). A contact member (10) is threadedly connected to the threaded blind hole (9). The end of the contact member (10) has a non-circular blind hole (11). A hollow member (12) is axially slidably installed within the non-circular blind hole (11). The end of the hollow member (12) is fixedly connected to the end of the tungsten needle clamp (4). The end of the pressure cap (6) is axially slidably connected to the sliding hole (8). A buckle member (13) is fixedly installed at the end of the pressure cap (6). The welding torch rod (1) is provided with a snap-fit ​​groove (14) that cooperates with the snap-fit ​​component (13). The snap-fit ​​component (13) includes multiple connecting rods (13a) fixedly installed at the end of the pressure cap (6), and multiple connecting blocks (13b) fixedly installed on opposite sides of the connecting rods (13a). The snap-fit ​​groove (14) includes an annular groove (14a) opened on the welding torch rod (1), a splitting groove (14b) opened on one side of the annular groove (14a), and an L-shaped groove (14c) opened on the other side of the annular groove (14a). The number and position of the L-shaped groove (14c) and the splitting groove (14b) are matched with the connecting block (13b). By pulling the pressure cap (6) out of the welding gun rod (1), the spring (7) separates the tungsten needle clamp (4) and the guide (2) so that the tungsten electrode (5) is no longer clamped. By rotating the pressure cap (6) clockwise or counterclockwise, the tungsten electrode (5) can be extended or retracted into the welding gun rod (1). When the pressure cap (6) is pushed back into the welding gun rod (1), the tungsten needle clamp (4) can be clamped back into the tungsten electrode (5).

2. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: The end of the tungsten needle clip (4) and the sliding hole (8) are both designed as mutually cooperating polygons.

3. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: The outer circumferential surface of the end of the pressure cap (6) inserted into the sliding hole (8) is circular, the cross-section of the non-circular blind hole (11) is polygonal, and the hollow part (12) does not contact the inner circumferential surface of the pressure cap (6).

4. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: The distance between the end of the hollow part (12) and the end of the threaded blind hole (9) is less than the length of the abutting part (10).

5. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: A first sealing plate (15) is provided between the welding torch rod (1) and the ceramic nozzle (3), and the flow guide (2) passes through the first sealing plate (15).

6. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: A second sealing plate (16) is provided between the plurality of connecting rods (13a), and one end of the pressure cap (6) inserted into the sliding hole (8) passes through the second sealing plate (16).

7. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: The diameter of the tungsten electrode (5) is smaller than the inner diameter of the hollow part (12), and the tungsten electrode (5) does not contact the hollow part (12).

8. The argon arc welding apparatus for metal part processing according to claim 1, characterized in that: The size of the portion of the tungsten needle clip (4) located inside the sliding hole (8) is larger than the size of the portion located inside the guide member (2). The adjacent ends of the guide member (2) and the tungsten needle clip (4) respectively contact the two ends of the spring (7).

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