Water-cooled welding gun for casting repairing cold welding machine

Abstract

The utility model relates to the technical field of welding devices, in particular to a water-cooling welding gun for a casting repair cold welding machine, which comprises a front gun body and a rear gun body, a main shaft is assembled on the front gun body, and the front end of the main shaft is connected with a rotary chuck; a motor is assembled in the rear gun body and connected with the rear end of the main shaft through a coupler. A water cooling cavity distributed around the main shaft is formed in the front gun body; the water cooling cavity is provided with a water inlet and a water outlet; the rear gun body is provided with an inner cavity, and the rear end of the rear gun body is provided with an opening communicated with the inner cavity and used for connecting a water pipe; the water inlet and the water outlet simultaneously penetrate into the inner cavity to be connected with a water pipe; the water cooling cavity capable of being filled with cooling water is formed in the front gun body, so that the welding gun has an internal self-cooling function, the large-range water cooling effect of the shaft body and the coupler surrounding the main shaft and located in the gun body is achieved, the accurate and continuous cooling effect on a heating source is achieved, and the heating problem of welding gun operation is greatly solved.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to a cold welding machine for casting repair using a water-cooled welding torch. Background Technology

[0002] The welding torch of a cold welding machine for casting repair is an important piece of electromechanical equipment, mainly used for welding and repairing metal parts (in the casting industry, mold processing, machining, and manufacturing of various metal parts). During operation, the worker needs to hold the welding torch by hand. The torch rotates via a spindle, driving a rotating chuck to hold the welding rod. Overheating can occur during actual use.

[0003] The existing technology uses external water flushing to cool the heating part at the front of the welding torch. This involves running two water pipes outside the torch casing. When in use, cold water flows through the pipes to cool the torch body. This method has obvious disadvantages: First, external water flushing only cools the outer shell of the welding torch and does not cool the heat source, such as the spindle, bearings, or couplings. The inside of the welding torch still gets very hot. Second, with the water pipes outside the torch casing, it is very inconvenient for the operator to hold the welding torch and use it. The operator is also prone to bumping into the water pipes. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a water-cooled welding gun for a cold welding machine for casting repair, so as to solve the problems of poor cooling effect and inconvenience of external water pipe routing in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a water-cooled welding gun for a cold welding machine for casting repair, comprising a front gun body and a rear gun body;

[0006] The front gun body is equipped with a main shaft, and the front end of the main shaft is connected to a rotating chuck for holding welding rods.

[0007] The rear gun body is equipped with a motor, which is connected to the rear end of the main shaft via a coupling;

[0008] The front gun body is provided with a water-cooled cavity distributed around the main shaft, and the rear end of the water-cooled cavity is provided with a water inlet and a water outlet; the front end of the front gun body is provided with a flange ring, which is closed at the front end of the water-cooled cavity.

[0009] The rear gun body has an inner cavity, and the rear end of the rear gun body has multiple openings that connect to the inner cavity for connecting water pipes and electrical wires; the water inlet and water outlet both extend into the inner cavity and are connected to water pipes.

[0010] In one embodiment of the present invention, the flange ring is provided with an insulating seat, which is distributed on the outside of the main shaft and does not contact the main shaft; the insulating seat is equipped with a carbon brush, and a brass sheet is frictionally fitted at the front end of the carbon brush, which is sleeved on the main shaft.

[0011] In one embodiment of the present invention, the front gun body is further provided with wiring holes extending axially to both ends. The wiring holes are distributed on the outside of the water-cooling cavity. The wires are connected from the rear end of the rear gun body, pass through the inner cavity and the wiring holes in sequence, and are then connected to the carbon brush.

[0012] In one embodiment of the present invention, the rear end of the rear gun body is provided with a spiral welding gun tail for protecting the welding gun water pipe and electrical wire routing.

[0013] In one embodiment of this utility model, the front end of the front gun body is fitted with a threaded detachable welding gun cap for protecting the rotating chuck.

[0014] In one embodiment of this utility model, a ceramic bearing is provided in the front gun body, and the main shaft is rotatably assembled in the front gun body through the ceramic bearing.

[0015] As described above, the casting repair cold welding machine of this utility model uses a water-cooled welding torch, which has the following beneficial effects:

[0016] This invention features a water-cooling chamber within the front body, allowing cooling water to flow through, thus enabling the welding torch to have internal self-cooling capabilities. This achieves a wide-range water-cooling effect around the main shaft, bearings, and couplings within the torch body, providing precise and continuous cooling of the heat source. This prevents component failures caused by excessively high welding torch operating temperatures, significantly improving the welding torch's heat generation problem, effectively extending its service life, and enhancing its performance. With the water-cooling chamber and inlet / outlet ports located inside the torch body, water pipes can be routed internally, eliminating the inconvenience and risk of injury to the water pipes during handling. The overall appearance of the welding torch is also aesthetically pleasing. Attached Figure Description

[0017] Figure 1 The diagram shows the external view of the cold welding machine for casting repair disclosed in this utility model, with the water-cooled welding gun.

[0018] Figure 2 The diagram shown is a cross-sectional view of the casting repair cold welding machine disclosed in this utility model, showing the removal of the welding torch cap and tail using a water-cooled welding torch.

[0019] Figure 3 The image shown is a three-dimensional structural diagram of the front body of the water-cooled welding gun in the cold welding machine for casting repair disclosed in this utility model.

[0020] Figure 4 Displayed as Figure 3 A schematic diagram of the three-dimensional structure from another perspective.

[0021] Component designation explanation

[0022] Front gun body 1; water cooling cavity 11; water inlet 12; water outlet 13; wiring hole 14; rear gun body 2; inner cavity 21; main shaft 3; rotating chuck 4; motor 5; coupling 6; insulating seat 7; carbon brush 8; brass sheet 9; flange ring 10; welding torch cap 15; welding torch tail 16; ceramic bearing 17. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figures 1 to 4 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] Please see Figures 1-4This utility model provides a water-cooled welding torch for a cold welding machine for casting repair, comprising a front torch body 1 and a rear torch body 2, which are detachably connected by bolts. The front end of the front torch body 1 is fitted with a threaded, detachable welding torch cap 8, and the rear end of the rear torch body 2 is provided with a spiral welding torch tail 16 for protecting the welding torch water pipe and electrical wiring. A main shaft 3 is mounted on the front torch body 1, and a rotating chuck 4 is connected to the front end of the main shaft 3 for holding welding rods. The welding torch cap 8 protects the rotating chuck 4. A motor 5 is mounted in the rear torch body 2, and the motor 5 is connected to the rear end of the main shaft 3 via a coupling 6. The front end of the front gun body 1 is provided with a flange ring 10, which is formed by two threaded flanges screwed together with opposing threads, and a sealing ring is provided between the two threaded flanges; the flange ring 10 is provided with an insulating seat 7, which is distributed on the outside of the main shaft 3 and does not contact the main shaft 3; a carbon brush holder is mounted on the insulating seat 7, and a carbon brush 8 is mounted on the carbon brush holder. The insulating seat 7 and the carbon brush 8 remain stationary relative to the main shaft 3 so that the carbon brush 8 can be connected to the wire; a brass sheet 9 is frictionally fitted at the front end of the carbon brush 8, and the brass sheet 9 is sleeved on the main shaft 3; the insulating seat 7 contacts the flange ring 10 and the front gun body 1 to form insulation; the front gun body The front gun body 1 is provided with a wiring hole 14 extending axially to both ends. The wiring hole 14 is distributed on the outside of the water-cooling cavity 11. The wire is connected from the rear end of the rear gun body 2, passes through the inner cavity 21 and the wiring hole 14 in sequence, and is connected to the carbon brush 8. The front gun body 1 is also provided with a vent hole extending axially to both ends. The vent hole is distributed on one side of the wiring hole 14 and is used to introduce protective gas. In actual use, the motor 5 drives the spindle 3 to rotate, which drives the brass sheet 9 to conduct electricity through friction with the carbon brush 8. The rotating chuck 4 holds the welding rod and performs welding repair work on the product. At the same time, the welding protective gas is introduced into the position of the rotating chuck 4 through the vent hole.

[0026] The front gun body 1 is provided with a water-cooled cavity 11 surrounding the main shaft 3. The rear end of the water-cooled cavity 11 is provided with a water inlet 12 and a water outlet 13. The flange ring 10 is used to compress the sealing ring to seal the upper end face of the water-cooled cavity. The rear gun body 2 has an inner cavity 21. The rear end of the rear gun body 2 has an opening that connects to the inner cavity 21 for connecting water pipes and wires. The water inlet 12 and the water outlet 13 both pass through the inner cavity 21 to connect water pipes. The water-cooled cavity 11 and the water inlet and outlet are all located inside the gun body. The water pipes can run through the gun body, solving the problem of inconvenience caused by the water pipes when the operator is holding the gun and the problem of bumping into the water pipes. The overall appearance of the welding gun body is aesthetically pleasing. When the welding gun is actually in operation, cold water is connected through the water pipe. The cold water enters the water-cooled cavity 11 from the water inlet 12, which can simultaneously provide a surrounding circulation cooling for the main shaft 3 and the coupling 6, effectively solving the problem of overheating during the use of the welding gun.

[0027] The front gun body 1 is equipped with a ceramic bearing 10, and the main shaft 3 is rotatably mounted on the front gun body 1 via the ceramic bearing 10. The ceramic bearing 10 has advantages such as cold resistance, low elasticity under stress, high pressure resistance, poor thermal conductivity, light weight, low coefficient of friction, and electromagnetic insulation. It can be used in high-speed spindles of 12,000 to 75,000 revolutions per minute and other high-precision equipment. The ceramic bearing 10 material itself has a high temperature resistance of 1200 degrees Celsius, good self-lubrication, and an operating temperature range of 100 degrees Celsius to 800 degrees Celsius. The ceramic bearing 10 does not expand due to temperature differences within a certain range; the material itself is corrosion-resistant and can be used in fields such as strong acids, strong alkalis, inorganic and organic salts, and seawater, including electroplating equipment, electronic equipment, chemical machinery, shipbuilding, and medical devices; the ceramic bearing 10 has characteristics such as high temperature resistance, cold resistance, wear resistance, corrosion resistance, anti-magnetic and electrical insulation, oil-free self-lubrication, and high speed, and can be used in extremely harsh environments and special working conditions; furthermore, the ceramic bearing 10 has unique oil-free self-lubrication properties, resulting in better rotational connection. At least two ceramic bearings 10 are provided, and multiple ceramic bearings 10 can improve the rotational assembly effect of the main shaft 3 relative to the front gun body 1.

[0028] In summary, this utility model, by incorporating a water-cooling chamber 11 within the front gun body, enables the welding torch to possess an internal self-cooling function. This achieves a wide-range water-cooling effect around the main shaft 3 and the coupling 6 within the gun body, providing precise and continuous cooling of the heat source. This prevents component failures caused by excessively high welding torch operating temperatures, significantly improving the welding torch's overheating problem, effectively extending its service life and enhancing its performance. Furthermore, the water-cooling chamber 11 and the inlet / outlet are both located inside the gun body, allowing water pipes to run internally, eliminating the inconvenience and risk of injury to the water pipes during handling. The overall appearance of the welding torch is also aesthetically pleasing. This utility model features a reasonable overall design, simple structure, and high practicality. Therefore, it effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0029] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A cold welding machine for repairing castings uses a water-cooled welding torch, comprising a front torch body (1) and a rear torch body (2); The front gun body (1) is equipped with a main shaft (3), and the front end of the main shaft (3) is connected to a rotating chuck (4) for holding welding rods; The rear gun body (2) is equipped with a motor (5), which is connected to the rear end of the main shaft (3) via a coupling (6); Its features are: The front gun body (1) is provided with a water-cooled cavity (11) distributed around the main shaft (3). The rear end of the water-cooled cavity (11) is provided with a water inlet (12) and a water outlet (13). The front end of the front gun body (1) is provided with a flange ring (10), which is closed at the front end of the water-cooled cavity (11). The rear gun body (2) has an inner cavity (21), and the rear end of the rear gun body (2) has multiple openings that communicate with the inner cavity (21) for connecting water pipes and electrical wires; the water inlet (12) and the water outlet (13) are connected to the water pipes in the inner cavity (21).

2. The casting repair cold welding machine according to claim 1 uses a water-cooled welding torch, characterized in that: An insulating seat (7) is provided on the flange ring (10). The insulating seat (7) is distributed on the outside of the main shaft (3) and has no contact with the main shaft (3). A carbon brush (8) is installed on the insulating seat (7). A brass sheet (9) is frictionally fitted at the front end of the carbon brush (8). The brass sheet (9) is sleeved on the main shaft (3).

3. The casting repair cold welding machine according to claim 2 uses a water-cooled welding torch, characterized in that: The front gun body (1) is also provided with wiring holes (14) extending axially to both ends. The wiring holes (14) are distributed on the outside of the water-cooling cavity (11). The wire is connected from the rear end of the rear gun body (2), passes through the inner cavity (21) and the wiring hole (14) in sequence, and is then connected to the carbon brush (8).

4. The casting repair cold welding machine according to claim 3 uses a water-cooled welding torch, characterized in that: The rear end of the rear gun body (2) is provided with a spiral welding gun tail (16) for protecting the welding gun water pipe and wire routing.

5. The casting repair cold welding machine according to claim 1 uses a water-cooled welding torch, characterized in that: The front end of the front gun body (1) is fitted with a threaded detachable welding gun cap (15) for protecting the rotating chuck (4).

6. The casting repair cold welding machine according to claim 1 uses a water-cooled welding torch, characterized in that: The front gun body (1) is provided with a ceramic bearing (17), and the main shaft (3) is rotatably mounted in the front gun body (1) through the ceramic bearing (17).

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