Multi-layer cavity channel full-coverage water cooling robot welding gun

Abstract

The invention discloses a multi-layer cavity full-coverage water cooling robot welding gun which comprises a shell, a double-water-cooling gun neck and a water cooling nozzle. The shell is installed on the mechanical arm so as to be connected with the welding robot. The double-water-cooling gun neck is installed at the front end of the shell and sequentially comprises an inner pipe, an inner isolation pipe, an outer isolation pipe and an outer pipe from inside to outside, an inner ring water path channel is formed between the inner pipe and the inner isolation pipe, an air path channel is formed between the inner isolation pipe and the outer isolation pipe, an outer ring water path channel is formed between the outer isolation pipe and the outer pipe, and the air path channel is communicated with the outer pipe. Double-layer water cooling of the gun neck is achieved, and the cooling effect is improved. The water-cooling nozzle is mounted at the front end of the double-water-cooling gun neck and comprises an inner nozzle pipe and an outer nozzle pipe, a nozzle waterway channel is formed between the inner nozzle pipe and the outer nozzle pipe, and the nozzle waterway channel is communicated with the outer ring waterway channel, so that comprehensive water cooling of the whole welding gun is realized, and the water-cooling efficiency and the water-cooling effect are improved; the service life of parts of the welding gun is prolonged, and 24-hour welding operation all day long is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of robot welding guns, and in particular relates to a multi-layer cavity fully covered water-cooled robot welding gun. Background Art

[0002] In modern industrial production, robot welding guns, as a key welding equipment, are widely used in many fields such as automobile manufacturing and mechanical processing. With the continuous improvement of the degree of automated production, robot welding guns often need to work continuously for a long time. This high-intensity and long-term working mode puts higher requirements on the performance and durability of welding guns. However, there is a more prominent problem with the existing robot welding guns during long-term operation. Since a large amount of heat is generated during the welding process, especially the front end of the welding gun is directly involved in the welding operation and will be subjected to extremely high temperatures. If this heat cannot be dissipated in a timely and effective manner, the front end of the welding gun will be damaged due to overheating, such as nozzle deformation and increased wear of the conductive nozzle.

[0003] Traditional cooling welding guns have many shortcomings. First, their cooling efficiency is low and cannot meet the needs of high-intensity welding operations. Secondly, the cooling area is small, especially for the tip of the welding gun, the cooling effect is particularly poor. This insufficient cooling not only affects the welding quality, causing defects such as pores and slag inclusions in the weld, but also increases the maintenance cost and downtime of the welding gun, thereby reducing the overall production efficiency. In addition, due to the poor cooling effect, the front-end components of the welding gun are damaged frequently and need to be replaced frequently. This not only increases maintenance costs, but also causes a waste of resources, which is contrary to the green production concept pursued today. Frequent replacement of parts will also lead to frequent shutdowns of the production line, further affecting production efficiency. At the same time, the existing cooling system can usually only cool certain parts of the welding gun and cannot achieve full coverage. This local cooling method will cause uneven temperature distribution in various parts of the welding gun, which may cause thermal stress problems and affect the service life and welding accuracy of the welding gun.

[0004] In view of the above problems, the existing technology needs to be improved urgently. Summary of the invention

[0005] In view of the problems and shortcomings of the above-mentioned prior art, the present invention provides a multi-layer cavity fully covered water-cooled robot welding gun, which realizes double-layer water cooling of the welding gun neck by opening an inner ring water channel and an outer ring water channel on the double water-cooled gun neck, which can cool down both the inner tube and the outer tube, thereby improving the water cooling efficiency and water cooling quality. By opening a nozzle water channel in the water-cooled nozzle, water cooling of the front end of the welding gun is achieved, improving the welding quality and the service life of welding parts, so that the robot welding gun can work 24 hours a day and improve work efficiency.

[0006] The present invention is achieved through the following technical solutions:

[0007] A multi-layer cavity fully covered water-cooled robot welding gun comprises a shell, a double water-cooled gun neck and a water-cooled nozzle. The shell is mounted to a robotic arm to achieve connection with a welding robot. The double water-cooled gun neck is mounted to the front end of the shell, and the double water-cooled gun neck comprises an inner tube, an inner isolation tube, an outer isolation tube and an outer tube from the inside to the outside, an inner ring water channel is formed between the inner tube and the inner isolation tube, an air channel is formed between the inner isolation tube and the outer isolation tube, and an outer ring water channel is formed between the outer isolation tube and the outer tube. The water-cooled nozzle is mounted to the front end of the double water-cooled gun neck, and the water-cooled nozzle comprises an inner nozzle tube and an outer nozzle tube, a nozzle water channel is formed between the inner nozzle tube and the outer nozzle tube, and the nozzle water channel is connected with the outer ring water channel, so as to achieve comprehensive water cooling of the entire welding gun and improve the water cooling efficiency and effect.

[0008] Furthermore, separation ribs are provided in the inner ring water channel, the air channel, the outer ring water channel and the nozzle water channel. The separation ribs separate the inner ring water channel into an inner water inlet area and an inner water outlet area, the separation ribs separate the outer ring water channel into an outer water inlet area and an outer water outlet area, and the separation ribs separate the nozzle water channel into a nozzle water inlet area and a nozzle water outlet area.

[0009] The liquid in the chiller flows back to the chiller through the inner water inlet area, the inner water outlet area, the outer water inlet area, the nozzle water inlet area, the nozzle water outlet area and the outer water outlet area in sequence.

[0010] Furthermore, separation ribs are fixedly arranged between the inner tube and the inner isolation tube, between the inner isolation tube and the outer isolation tube, between the outer isolation tube and the outer tube, and between the inner nozzle tube and the outer nozzle tube;

[0011] Along the circumferential direction of the double water-cooled gun neck and the water-cooled nozzle, multiple separation ribs are evenly arranged to increase the connection strength between the inner tube and the inner isolation tube, between the inner isolation tube and the outer isolation tube, between the outer isolation tube and the outer tube, and between the inner nozzle tube and the outer nozzle tube, thereby improving the structural strength of the double water-cooled gun neck and the water-cooled nozzle.

[0012] Furthermore, the inner water inlet area and the inner water outlet area are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooling gun neck, and the outer water inlet area and the outer water outlet area are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooling gun neck.

[0013] Furthermore, the shell is provided with a water inlet joint connected to the inner water inlet area, a water outlet joint connected to the outer water outlet area, and an air inlet joint connected to the air path, the chiller is connected to the water inlet joint and the water outlet joint respectively, and the robot welding gun also includes an air supply device connected to the air inlet joint;

[0014] The inner nozzle tube is provided with a water inlet hole connected to the external water inlet area and a water outlet hole connected to the external water outlet area. There are multiple water inlet holes and water outlet holes, and they are evenly distributed along the circumferential direction of the inner nozzle tube, so that the water flow can flow evenly in the nozzle water channel, thereby improving the heat exchange efficiency of the water-cooled nozzle.

[0015] Furthermore, the outer wall of the inner tube, the outer wall of the outer isolation tube and the outer wall of the inner nozzle tube are all provided with guide ribs, which can change the flow direction of liquid in the inner ring water channel, the outer ring water channel and the nozzle water channel.

[0016] Furthermore, the lengths of the inner ring water channel, the gas channel and the outer ring water channel are equal to the length of the double water-cooled gun neck, and the length of the nozzle water channel is equal to the length of the water-cooled nozzle, thereby achieving full coverage water cooling of the welding gun.

[0017] Furthermore, flow rate sensors and temperature sensors are provided in the inner ring water channel, the outer ring water channel and the nozzle water channel to monitor the water flow velocity and temperature in the inner ring water channel, the outer ring water channel and the nozzle water channel.

[0018] Furthermore, a wire feeding tube is provided in the inner tube, and the robot welding gun also includes a conductive nozzle, which is installed at the front end of the gun neck through the conductive tube, and the conductive nozzle is connected to the wire feeding tube, and an air outlet hole connected to the air path is opened on the conductive tube, and a plurality of air outlet holes are provided and evenly distributed along the circumferential direction of the conductive tube. The conductive nozzle is directly installed on the conductive tube, which shortens the distance between the conductive nozzle and the gun neck, makes the conductive nozzle closer to the inner ring water path, and can extend the service life of the conductive nozzle by 20%-30% compared with the existing conductive nozzle installation method.

[0019] Furthermore, the water-cooling nozzle also includes a nozzle head, which is threadedly connected to the outer nozzle pipe, so that the nozzle head is easy to replace.

[0020] Beneficial effects of the present invention:

[0021] Full coverage water cooling is achieved through multi-layer cavity design, which effectively solves the problems of low cooling efficiency, small cooling area, complex structure, heavy weight, large volume, narrow application range and uneven temperature distribution of traditional welding guns. It has the advantages of high cooling efficiency, large cooling area, simple structure, light weight, small volume, wide application range, uniform temperature distribution, long service life and high welding precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A connection diagram for illustrating an exemplary embodiment of a multi-layer cavity fully covered water-cooled robot welding gun of the present invention;

[0023] Figure 2A cross-sectional view for illustrating a schematic embodiment of a multi-layer cavity fully covered water-cooled robot welding gun of the present invention;

[0024] Figure 3 A cross-sectional view for illustrating a schematic embodiment of a double water-cooled gun neck of a multi-layer cavity fully covered water-cooled robot welding gun of the present invention;

[0025] Figure 4 A schematic structural diagram for illustrating an exemplary embodiment of a water-cooling nozzle of a multi-layer cavity-fully-covered water-cooling robot welding gun in the present invention;

[0026] Figure 5 A cross-sectional view for illustrating a schematic embodiment of a water-cooling nozzle of a multi-layer cavity-fully-covered water-cooling robot welding gun of the present invention;

[0027] Figure 6 A schematic structural diagram for illustrating a schematic embodiment of a cutaway state of a multi-layer cavity-fully-covered water-cooled robot welding gun of the present invention;

[0028] Figure 7 A structural schematic diagram for illustrating another exemplary embodiment of a cutaway state of a multi-layer cavity fully covered water-cooled robot welding gun in the present invention.

[0029] List of parts and reference numerals:

[0030] 1. Shell; 11. Water inlet joint; 12. Water outlet joint; 13. Air inlet joint; 2. Double water-cooled gun neck; 21. Inner tube; 22. Inner isolation tube; 23. Outer isolation tube; 24. Outer tube; 25. Inner ring water channel; 251. Inner water inlet area; 252. Inner water outlet area; 26. Air channel; 27. Outer ring water channel; 271. Outer water inlet area; 272. Outer water outlet area; 3. Water-cooled nozzle; 31. Inner nozzle tube; 311. Water inlet hole; 312. Water outlet hole; 32. Outer nozzle tube; 33. Nozzle water channel; 331. Nozzle water inlet area; 332. Nozzle water outlet area; 34. Nozzle head; 4. Separation ribs; 5. Guide ribs; 6. Conductive nozzle; 7. Conductive tube; 71. Air outlet hole. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that the directional terms such as left, right, up, down, front and back in the embodiments of the present invention are merely relative concepts or are based on the normal use state of the product, that is, the direction of movement of the product, and should not be considered as limiting.

[0033] In addition, it should be noted that the dynamic terms such as "relative motion" mentioned in the embodiments of the present invention refer not only to changes in position, but also to movements such as rotation and rolling in which there is no relative change in position but a change in state.

[0034] Finally, it should be noted that when a component is referred to as being "located" or "set on" another component, it can be on the other component or there can be an intermediate component at the same time. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be an intermediate component at the same time.

[0035] like Figures 1 to 7 A multi-layer cavity fully covered water-cooled robot welding gun is shown, comprising a shell 1, a double water-cooled gun neck 2 and a water-cooled nozzle 3. The shell 1 is mounted on a robot arm to achieve connection with a welding robot. The double water-cooled gun neck 2 is mounted on the front end of the shell 1, and the double water-cooled gun neck 2 includes an inner tube 21, an inner isolation tube 22, an outer isolation tube 23 and an outer tube 24 from the inside to the outside. An inner ring water channel 25 is formed between the inner tube 21 and the inner isolation tube 22, an air channel 26 is formed between the inner isolation tube 22 and the outer isolation tube 23, and an outer ring water channel 27 is formed between the outer isolation tube 23 and the outer tube 24. The water-cooled nozzle 3 is mounted on the front end of the double water-cooled gun neck 2, and the water-cooled nozzle 3 includes an inner nozzle tube 31 and an outer nozzle tube 32, and a nozzle water channel 33 is formed between the inner nozzle tube 31 and the outer nozzle tube 32. The nozzle water channel 33 is connected with the outer ring water channel 27, so as to achieve comprehensive water cooling of the entire welding gun and improve the water cooling efficiency and water cooling effect.

[0036] In modern industrial production, robot welding guns are widely used in automobile manufacturing, mechanical processing and other fields as key welding equipment. With the continuous improvement of the degree of automated production, robot welding guns often need to work continuously for a long time. However, during the long operation process, the large amount of heat generated by welding, especially the extremely high temperature that the front end of the welding gun bears when it is directly involved in the welding operation, will cause damage to the front end parts of the welding gun if it cannot be dissipated in time and effectively. This heat accumulation problem seriously affects the welding quality and equipment life. Specifically, overheating may cause the nozzle to deform and the conductive nozzle 6 to wear faster, which in turn causes defects such as pores and slag inclusions in the weld. In addition, the cooling efficiency of traditional cooling welding guns is low and the cooling area is small, especially the cooling effect on the tip of the welding gun is poor, which cannot meet the needs of high-intensity welding operations.

[0037] Taking the automobile body welding production line as an example, a typical welding station may need to work continuously for more than 8 hours. In this high-intensity working environment, the temperature of the welding gun may quickly rise to more than 800°C. The traditional single-layer water cooling system usually only covers the main body of the welding gun, and the cooling effect on the front nozzle area is limited. For example, in a welding process lasting 30 minutes, the temperature at the front end of the welding gun may rise from room temperature to 600°C, while the traditional cooling system can only reduce the temperature to about 400°C. In this case, the conductive tip 6 and the nozzle at the front end of the welding gun will accelerate wear due to continuous high temperature. Specifically, the service life of the conductive tip 6 may be shortened from the normal 8 hours to less than 4 hours, and the frequency of nozzle replacement may also increase from once a week to once a day. In addition, due to unstable temperature control, welding parameters are difficult to accurately control, resulting in fluctuations in weld quality, and the rework rate may rise from the normal 1% to more than 5%.

[0038] If the problem of heat accumulation in the welding gun cannot be effectively solved, it will have a serious impact on the entire welding production process. First, the welding quality will be difficult to guarantee, and the strength and appearance of the weld may not meet the design standards, increasing the scrap rate and rework cost of the product. Secondly, the frequent replacement of welding gun parts not only increases the maintenance cost, but also leads to increased downtime of the production line, which directly affects production efficiency. For example, if a production line with an annual output of 100,000 vehicles is shut down for an additional hour per day due to welding gun problems, the annual production capacity loss may reach 4,000 vehicles. In addition, the accelerated consumption of welding gun parts is also contrary to the concept of sustainable production, increasing resource waste and environmental burden. In the long run, if this problem is not solved, it will seriously restrict the further development of welding automation technology and affect the upgrading process of the entire manufacturing industry. Therefore, the development of a new cooling system that can fully and efficiently cool the welding gun, especially the front end of the welding gun, has become a key issue that needs to be urgently solved in the current field of welding technology.

[0039] This application conducts in-depth analysis and thinking on the problem of heat accumulation in existing robot welding guns during long-term operation. Specifically, the large amount of heat generated during welding, especially the extremely high temperature borne by the front end of the welding gun, will cause damage to the front end parts of the welding gun if it cannot be dissipated effectively and in a timely manner, affecting the welding quality and equipment life.

[0040] To solve this problem, the present application first considered the solution of increasing the cooling water flow rate. However, simply increasing the water flow rate may lead to excessive water pressure, affecting the structural stability of the welding gun. Secondly, the solution of extending the cooling water circuit was considered, but this may increase the size and weight of the welding gun and affect the operational flexibility.

[0041] After repeated thinking and optimization, this application proposes an innovative solution for a multi-layer cavity full-coverage water cooling structure. Specifically, a multi-layer cooling system including an inner ring water channel 25, an outer ring water channel 27 and a nozzle water channel 33 is designed. Among them, the inner ring water channel 25 is arranged between the inner tube 21 and the inner isolation tube 22, the outer ring water channel 27 is arranged between the outer isolation tube 23 and the outer tube 24, and the nozzle water channel 33 is arranged between the inner nozzle tube 31 and the outer nozzle tube 32. This design not only increases the cooling area, but also realizes effective cooling of the front end of the welding gun.

[0042] To further improve the cooling efficiency, the present application sets separation ribs 4 in each water channel. These separation ribs 4 separate the water channel into a water inlet area and a water outlet area, ensuring that the cooling water forms an orderly circulation flow inside the welding gun, and avoiding the cooling efficiency reduction caused by the mixing of cold and hot water.

[0043] At the same time, considering the need for protective gas during welding, the present application designs a gas path 26 between the inner isolation tube 22 and the outer isolation tube 23. This design not only meets the delivery requirements of welding gas, but also enhances the overall heat dissipation effect through the multi-layer structure.

[0044] In addition, in order to ensure the stability and reliability of the cooling system, the present application sets a water inlet joint 11, a water outlet joint 12 and an air inlet joint 13 on the housing 1, which is convenient for connecting with an external chiller and an air supply device. A plurality of evenly distributed water inlet holes 311 and water outlet holes 312 are opened on the inner nozzle tube 31 to ensure that the cooling water can fully cover the front end area of ​​the welding gun.

[0045] Therefore, the present application proposes a multi-layer cavity fully covered water-cooled robot welding gun, including a shell 1, a double water-cooled gun neck 2 and a water-cooled nozzle 3. The shell 1 is installed to the robot arm. The double water-cooled gun neck 2 is installed to the front end of the shell 1, and includes an inner tube 21, an inner isolation tube 22, an outer isolation tube 23 and an outer tube 24 from the inside to the outside, forming an inner ring water channel 25, an air channel 26 and an outer ring water channel 27. The water-cooled nozzle 3 is installed to the front end of the double water-cooled gun neck 2, including an inner nozzle tube 31 and an outer nozzle tube 32, and a nozzle water channel 33 is formed between the two, which is connected to the outer ring water channel 27. This design realizes effective cooling of the entire body of the welding gun, especially the front end, and solves the problem of heat accumulation during long-term welding operations.

[0046] The housing 1 refers to an external structure installed on the robot arm, which may be made of metal materials such as aluminum alloy or stainless steel, and is used to fix and protect internal components.

[0047] The double water-cooled gun neck 2 refers to a multi-layer pipe structure installed at the front end of the shell 1, and can be specifically designed as a coaxial circular tube, which includes an inner tube 21, an inner isolation tube 22, an outer isolation tube 23 and an outer tube 24 from inside to outside.

[0048] The water-cooled nozzle 3 refers to a cooling structure installed at the front end of the double water-cooled gun neck 2 , and can specifically adopt an inner and outer two-layer pipeline design, including an inner nozzle pipe 31 and an outer nozzle pipe 32 .

[0049] The core innovation of this application is to use a multi-layer cavity structure to achieve full coverage water cooling. By setting an inner ring water channel 25, an air channel 26 and an outer ring water channel 27 in the double water-cooled gun neck 2, and setting a nozzle water channel 33 in the water-cooled nozzle 3, a multi-layer cooling system is formed. This design not only increases the cooling area, but also achieves effective cooling of the front end of the welding gun, solving the problem of heat accumulation during long-term welding operations.

[0050] Here’s how this application works:

[0051] The shell 1 is the external structure of the entire welding gun. It is made of high-temperature resistant and high-strength metal material and is usually cylindrical. One end is connected to the robot arm and the other end is connected to the double water-cooled gun neck 2. The shell 1 is provided with channels for cooling water and protective gas, which are used to connect the external cooling system and gas supply system.

[0052] The double water-cooled gun neck 2 is the core component of the present application and is composed of four layers of coaxial circular tubes. The inner tube 21 of the innermost layer is used to transmit welding wire and is usually made of wear-resistant material. The outer side of the inner tube 21 is the inner isolation tube 22, and an inner ring water channel 25 is formed between the two. The outer side of the inner isolation tube 22 is the outer isolation tube 23, and an air channel 26 is formed between the two for conveying shielding gas. The outermost layer is the outer tube 24, and an outer ring water channel 27 is formed between the outer isolation tube 23. This multi-layer structural design not only increases the cooling area, but also realizes the effective separation of cooling water and shielding gas.

[0053] The water-cooling nozzle 3 is installed at the front end of the double water-cooling gun neck 2, and is composed of an inner nozzle tube 31 and an outer nozzle tube 32. A nozzle water channel 33 is formed between the two, which is connected to the outer ring water channel 27. This design ensures that the cooling water can reach the front end of the welding gun and effectively cool the high-temperature area.

[0054] In actual operation, the cooling water first enters the inner ring water channel 25 to preliminarily cool the inner tube 21. Then it flows into the outer ring water channel 27 to continue cooling the outer isolation tube 23 and the outer tube 24. Finally, it enters the nozzle water channel 33 to cool the front end of the welding gun. This multi-layer cooling design ensures that the cooling water can fully cover the entire welding gun, especially the front end area with the highest temperature. At the same time, the shielding gas in the gas channel 26 not only protects the welding area, but also assists cooling to a certain extent.

[0055] The main reason for selecting the multi-layer cavity structure in this application is to increase the cooling area and improve the cooling efficiency. By setting the inner ring and outer ring water channel 27, the inside and outside of the welding gun can be cooled at the same time. The design of the nozzle water channel 33 solves the problem of insufficient cooling of the front end of the traditional welding gun. This structural design significantly improves the heat dissipation capacity of the welding gun, extends the service life of the welding gun, and also improves the welding quality and production efficiency.

[0056] As a preferred embodiment, the present application provides a specific embodiment of a multi-layer cavity fully covered water-cooled robot welding gun:

[0057] The housing 1 is made of 6061 aluminum alloy, with a length of 200 mm, an outer diameter of 60 mm, and an inner diameter of 55 mm. The front end of the housing 1 is provided with a threaded connection structure for installing a double water-cooled gun neck 2. The rear end of the housing 1 is provided with a standard interface for connecting with a robotic arm.

[0058] The total length of the double water-cooled gun neck 2 is 300 mm, and it includes, from inside to outside: inner tube 21: made of wear-resistant stainless steel, outer diameter 8 mm, inner diameter 6 mm. Inner isolation tube 22: made of 304 stainless steel, outer diameter 12 mm, inner diameter 10 mm. Outer isolation tube 23: made of 304 stainless steel, outer diameter 16 mm, inner diameter 14 mm. Outer tube 24: made of 304 stainless steel, outer diameter 20 mm, inner diameter 18 mm.

[0059] The cross-sectional area of ​​the inner ring water channel 25 is 28.27 mm 2 The cross-sectional area of ​​the outer ring water channel 27 is 50.27mm 2 The cross-sectional area of ​​the gas passage 26 is 31.42 mm 2 .

[0060] The water-cooling nozzle 3 is 50 mm long and includes: an inner nozzle tube 31 made of copper, with an outer diameter of 14 mm and an inner diameter of 12 mm. An outer nozzle tube 32 made of 304 stainless steel, with an outer diameter of 18 mm and an inner diameter of 16 mm.

[0061] The cross-sectional area of ​​the nozzle water channel 33 is 31.42 mm 2 .

[0062] In actual application, cooling water circulates at a flow rate of 2L / min through the inner ring water channel 25, the outer ring water channel 27 and the nozzle water channel 33. The shielding gas (such as argon) is delivered at a flow rate of 15L / min through the gas channel 26. During the 8-hour welding operation, the welding gun can control the front end temperature below 200°C, which is significantly lower than the 600-800°C of the traditional welding gun, effectively solving the problem of heat accumulation.

[0063] Preferably, the inner ring water channel 25, the gas channel 26, the outer ring water channel 27 and the nozzle water channel 33 are all provided with separation ribs 4, the separation ribs 4 separate the inner ring water channel 25 into an inner water inlet area 251 and an inner water outlet area 252, the separation ribs 4 separate the outer ring water channel 27 into an outer water inlet area 271 and an outer water outlet area 272, and the separation ribs 4 separate the nozzle water channel 33 into a nozzle water inlet area 331 and a nozzle water outlet area 332;

[0064] The liquid in the chiller flows back to the chiller via the inner water inlet area 251 , the inner water outlet area 252 , the outer water inlet area 271 , the nozzle water inlet area 331 , the nozzle water outlet area 332 and the outer water outlet area 272 in sequence.

[0065] In one embodiment, the improved multi-layer cavity fully covered water-cooled robot welding gun is provided with separation ribs 4 in the inner ring water channel 25, the gas channel 26, the outer ring water channel 27 and the nozzle water channel 33. The provision of these separation ribs 4 further separates each channel into different areas, thereby forming a more complex and efficient cooling system.

[0066] Specifically, the separation ribs 4 divide the inner ring water channel 25 into an inner water inlet area 251 and an inner water outlet area 252, divide the outer ring water channel 27 into an outer water inlet area 271 and an outer water outlet area 272, and divide the nozzle water channel 33 into a nozzle water inlet area 331 and a nozzle water outlet area 332. This partition design makes the flow path of the coolant more clear and orderly.

[0067] The liquid in the chiller flows in a specific order, passing through the inner water inlet area 251, the inner water outlet area 252, the outer water inlet area 271, the nozzle water inlet area 331, the nozzle water outlet area 332 and the outer water outlet area 272, and then flows back to the chiller. This design ensures that the coolant can fully contact all parts of the welding gun, especially the front end area with higher temperature.

[0068] Through this improved design, the present application achieves a more efficient and comprehensive cooling effect. The provision of the separation ribs 4 not only increases the contact area between the coolant and the inner wall of the welding gun, but also optimizes the flow path of the coolant through the partition design. This design allows the coolant to be more evenly distributed in various parts of the welding gun, especially for the front end area with higher temperature, which can provide more sufficient cooling.

[0069] Furthermore, the coolant flow path is carefully designed, advancing layer by layer from the inside to the outside, and finally forming a complete cooling cycle in the nozzle area. This design ensures that the coolant can fully absorb the heat generated by various parts of the welding gun and effectively remove the heat from the welding gun. As a result, the overall temperature of the welding gun is better controlled, especially the temperature of the front area can be more effectively reduced.

[0070] As a preferred embodiment, the separation ribs 4 can be made of metal materials, such as stainless steel or aluminum alloy. These materials have good thermal conductivity and corrosion resistance, and can promote heat transfer while ensuring structural strength. The thickness of the separation ribs 4 can be adjusted according to actual needs, for example, it can be set to between 0.5 mm and 2 mm. Thinner ribs can reduce the resistance to the flow of coolant, while thicker ribs can provide better structural support.

[0071] In practical applications, the flow rate and temperature of the coolant can be adjusted in real time through the control system. For example, when the welding current is large, the flow rate of the coolant can be appropriately increased to enhance the cooling effect. The temperature of the coolant can be set between 15°C and 25°C, and the specific temperature can be adjusted according to the welding process and ambient temperature.

[0072] Through this improved design, the multi-layer cavity fully covered water-cooled robot welding gun of the present application can better solve the overheating problem during long-term welding. Compared with the traditional cooling design, the solution of the present application can provide a more uniform and efficient cooling effect, especially the cooling effect of the front end of the welding gun is significantly improved. This not only extends the service life of the welding gun parts, but also improves the welding quality and production efficiency. At the same time, due to the improvement of the cooling effect, the maintenance frequency of the welding gun is reduced, thereby reducing downtime and maintenance costs.

[0073] Preferably, separation ribs 4 are fixedly provided between the inner tube 21 and the inner isolation tube 22, between the inner isolation tube 22 and the outer isolation tube 23, between the outer isolation tube 23 and the outer tube 24, and between the inner nozzle tube 31 and the outer nozzle tube 32;

[0074] Along the circumferential direction of the double water-cooled gun neck 2 and the water-cooled nozzle 3, a plurality of separation ribs 4 are evenly arranged to increase the connection strength between the inner tube 21 and the inner isolation tube 22, between the inner isolation tube 22 and the outer isolation tube 23, between the outer isolation tube 23 and the outer tube 24, and between the inner nozzle tube 31 and the outer nozzle tube 32, thereby improving the structural strength of the double water-cooled gun neck 2 and the water-cooled nozzle 3.

[0075] The present application can effectively separate and guide the flow of the coolant by evenly arranging multiple separation ribs 4 in the multi-layer cavity, thereby achieving a more uniform and efficient cooling effect. This design can not only solve the problem of uneven cooling of traditional welding guns, but also improve the overall cooling efficiency.

[0076] Specifically, the setting of the separation rib 4 plays an important role in many aspects:

[0077] First, a separation rib 4 is fixed between the inner tube 21 and the inner isolation tube 22, so that the inner ring water channel 25 can be divided into an inner water inlet area 251 and an inner water outlet area 252. This separation can ensure that the coolant forms an orderly circulation flow in the inner ring water channel 25, avoids the mixing of cold and hot water, and improves the cooling efficiency.

[0078] Secondly, a separation rib 4 is fixedly provided between the inner isolation tube 22 and the outer isolation tube 23. Although it is mainly used to form the gas path 26, it can also prevent the gas from mixing with the coolant, thereby ensuring the purity of the gas and the cooling effect of the coolant.

[0079] Thirdly, a separation rib 4 is fixed between the outer isolation tube 23 and the outer tube 24 to separate the outer ring water channel 27 into an outer water inlet area 271 and an outer water outlet area 272. This design allows the coolant to form independent water inlet and outlet flow paths in the outer ring water channel 27, further improving the cooling efficiency.

[0080] Finally, a separation rib 4 is fixed between the inner nozzle tube 31 and the outer nozzle tube 32 to separate the nozzle water channel 33 into a nozzle water inlet area 331 and a nozzle water outlet area 332. This is particularly important for cooling the front end of the welding gun, because this is the area where heat is concentrated and requires more efficient cooling.

[0081] It is worth noting that a plurality of separation ribs 4 are evenly arranged along the circumferential direction of the double water-cooled gun neck 2 and the water-cooled nozzle 3. This evenly distributed design ensures even flow of the coolant throughout the welding gun, avoiding the problem of local overheating or insufficient cooling. For example, 4-8 evenly distributed separation ribs 4 can be arranged in each cavity, and the specific number can be adjusted according to the size of the welding gun and the cooling requirements.

[0082] Through this design, the coolant can form a multi-layer, multi-path circulation flow in the welding gun. The coolant in the chiller first enters the inner water inlet area 251, then flows through the inner water outlet area 252, the outer water inlet area 271, the nozzle water inlet area 331, the nozzle water outlet area 332 and the outer water outlet area 272, and finally flows back to the chiller. This multi-layer circulation not only improves the cooling efficiency, but also ensures that all parts of the welding gun can be fully cooled.

[0083] In practical applications, the number and spacing of the separation ribs 4 can be adjusted according to the specific size and cooling requirements of the welding gun. For example, for a double water-cooled gun neck 2 with a length of 300 mm and a diameter of 50 mm, 6 evenly distributed separation ribs 4 can be set in each cavity, and the width of each rib is 2 mm and the height is the same as the cavity height. This ensures that the coolant will not form eddies or dead corners during the flow process, thereby achieving the best cooling effect.

[0084] In addition, the material selection of the separation ribs 4 is also very important. Materials with good thermal conductivity, such as copper or aluminum alloy, can be selected, which can not only play a role in separating the coolant, but also further enhance the conduction and dissipation of heat.

[0085] By adopting this multi-layer cavity full-coverage water cooling design and evenly arranging multiple separation ribs 4 in each cavity, the robot welding gun of the present application can achieve a more uniform and efficient cooling effect. Compared with the traditional single water channel cooling design, the solution of the present application can significantly improve the cooling efficiency of the welding gun, extend the service life of the welding gun, reduce the damage of parts caused by overheating, and thus improve the welding quality and production efficiency. At the same time, due to more uniform and efficient cooling, the welding gun can work for a long time at a higher power, meeting the demand for high-efficiency and high-quality welding in modern industrial production.

[0086] Preferably, the inner water inlet area 251 and the inner water outlet area 252 are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooled gun neck 2, and the outer water inlet area 271 and the outer water outlet area 272 are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooled gun neck 2.

[0087] This design has multiple technical effects. First, by making the water inlet and outlet areas symmetrically distributed in the cross section, the coolant can be evenly distributed in all parts of the welding gun to avoid local overheating or insufficient cooling. Second, the consistent volume of the water inlet and outlet areas can ensure the coolant flow rate is stable during the water inlet and outlet process, improving the heat exchange efficiency. In addition, this symmetrical design is also conducive to reducing thermal stress inside the welding gun and extending the service life of the equipment.

[0088] In practical applications, such a symmetrical design can be achieved through precision machining technology. For example, the inner tube 21, the inner isolation tube 22, the outer isolation tube 23 and the outer tube 24 can be machined by a CNC machine tool to ensure their concentricity and uniformity of wall thickness. The separation ribs 4 can be arranged at equal intervals and manufactured by laser cutting or precision casting to ensure the consistency of their shapes and sizes.

[0089] In the specific embodiment, it is assumed that the outer diameter of the double water-cooled gun neck 2 is 30 mm and the inner diameter is 25 mm. The cross-sectional area of ​​the inner ring water channel 25 can be designed to be 60 mm 2 , where the inner water inlet area 251 and the inner water outlet area 252 each occupy 30mm 2 The cross-sectional area of ​​the outer ring water channel 27 can be designed to be 80 mm 2 , where the external water inlet area 271 and the external water outlet area 272 each occupy 40mm 2 The outer diameter of the water cooling nozzle 3 can be set to 20 mm and the inner diameter to 16 mm. Such a design can ensure the symmetry and volume consistency of each water channel while providing sufficient coolant circulation space.

[0090] Compared with the prior art, the design of the present application significantly improves the cooling uniformity while ensuring the cooling effect. Traditional water-cooled welding guns often have only a single water channel, or the design of the water inlet and outlet areas is asymmetrical, which easily leads to insufficient cooling of certain parts of the welding gun. The present application achieves a full-range and uniform cooling effect through a multi-layer cavity design and symmetrically distributed water inlet and outlet areas, effectively solving the overheating problem during long-term welding operations, and improving welding quality and equipment service life.

[0091] Preferably, the housing 1 is provided with a water inlet joint 11 connected to the inner water inlet area 251, a water outlet joint 12 connected to the outer water area 272, and an air inlet joint 13 connected to the air passage 26, the chiller is connected to the water inlet joint 11 and the water outlet joint 12 respectively, and the robot welding gun also includes an air supply device connected to the air inlet joint 13;

[0092] The inner nozzle tube 31 is provided with a water inlet hole 311 connected to the external water inlet area 271 and a water outlet hole 312 connected to the external water outlet area 272. There are multiple water inlet holes 311 and water outlet holes 312, which are evenly distributed along the circumferential direction of the inner nozzle tube 31, so that the water flow can flow evenly in the nozzle water channel 33, thereby improving the heat exchange efficiency of the water-cooled nozzle 3.

[0093] In one embodiment, the key to this design is to optimize the layout of the water circuit and the gas circuit. The provision of the water inlet joint 11 and the water outlet joint 12 makes the inlet and outlet of the coolant more direct and efficient. The provision of the gas inlet joint 13 ensures the smooth supply of gas. The design of the water inlet hole 311 and the water outlet hole 312 on the inner nozzle tube 31 is particularly ingenious, which not only increases the distribution area of ​​the water circuit, but also improves the uniformity of the cooling effect through uniform distribution.

[0094] For example, the water inlet hole 311 and the water outlet hole 312 can be arranged at every 90 degrees, that is, 4 water inlet holes 311 and 4 water outlet holes 312 are evenly distributed in the circumference of the inner nozzle tube 31. Such a layout can ensure that the coolant forms a uniform cooling loop in the nozzle area. The diameter of the water inlet hole 311 can be designed to be 2-3 mm, and the diameter of the water outlet hole 312 can be slightly larger, designed to be 3-4 mm, to ensure smooth reflux of the coolant.

[0095] Specifically, when the welding gun is working, the heat is mainly concentrated in the front end area. Through the evenly distributed water inlet holes 311 on the inner nozzle tube 31, the coolant can directly enter the area that needs cooling the most. After absorbing the heat, the coolant flows back through the equally evenly distributed water outlet holes 312 to form an efficient cooling cycle. This design not only improves the cooling efficiency, but also ensures the uniformity of the cooling effect, effectively avoiding the problem of local overheating.

[0096] In addition, a temperature sensor can be installed at the water outlet connector 12 to monitor the temperature of the return coolant in real time. When the temperature exceeds a preset threshold (e.g., 40° C.), the chiller can be triggered to increase the cooling power or the coolant flow rate, thereby dynamically adjusting the cooling effect.

[0097] Compared with the prior art, the multi-layer cavity fully covered water-cooled robot welding gun of the present application has significantly improved cooling efficiency and uniformity. Traditional welding gun cooling systems usually have only a single water channel, and the cooling effect is limited and uneven. However, the present application achieves all-round cooling coverage of the welding gun through a multi-layer cavity design and evenly distributed inlet and outlet water holes 312. Especially in the area at the front end of the welding gun that is most prone to overheating, the design of the present application can provide more direct and efficient cooling. This not only extends the service life of the welding gun components, but also improves the stability of the welding quality and reduces welding defects caused by overheating.

[0098] Preferably, the outer wall of the inner tube 21 , the outer wall of the outer isolation tube 23 and the outer wall of the inner nozzle tube 31 are all provided with guide ribs 5 , which can change the flow direction of liquid in the inner ring water channel 25 , the outer ring water channel 27 and the nozzle water channel 33 .

[0099] This design can effectively change the direction of water flow and improve the uniformity and efficiency of water cooling by adding guide ribs 5 at key locations. The location of the guide ribs 5 is carefully designed to significantly improve the cooling effect without increasing the complexity of the overall structure.

[0100] Specifically, the guide ribs 5 can be in various shapes and arrangements. For example, a spiral, fishbone or wave-shaped structure can be used, which can effectively change the direction of water flow and increase the contact area between the water flow and the pipe wall. The number, spacing and angle of the guide ribs 5 can also be adjusted according to actual needs to achieve the best cooling effect.

[0101] The guide ribs 5 are arranged on the outer wall of the inner tube 21 to change the direction of the water flow in the inner ring water channel 25, so that the cooling water is more evenly distributed around the inner tube 21, thereby improving the cooling efficiency of the internal structure. The guide ribs 5 on the outer wall of the outer isolation tube 23 mainly act on the outer ring water channel 27, which can increase the turbulence of the water flow and promote heat exchange. The guide ribs 5 on the outer wall of the inner nozzle tube 31 guide the water flow in the nozzle water channel 33 to ensure that the nozzle part is fully cooled.

[0102] The synergistic effect of the three guide ribs 5 can form a complete cooling system. When the water flows through each channel, the guide ribs 5 continuously change the direction, increasing the contact time and area with the pipe wall, thereby improving the heat exchange efficiency. At the same time, the guide ribs 5 can also prevent the water flow from forming a "dead zone" to ensure the uniformity of the cooling effect.

[0103] As a preferred embodiment, the guide ribs 5 can be made of the same material as the pipe wall and fixed to the pipe wall by welding or integral molding. The height of the guide ribs 5 can be set to 10% to 30% of the channel diameter, so that a good guiding effect can be achieved without excessively hindering the water flow. The spacing of the guide ribs 5 can be adjusted according to the length of the channel, for example, a group of guide ribs 5 can be set every 50 mm to 100 mm.

[0104] In a specific embodiment, the guide ribs 5 on the outer wall of the inner tube 21 are spirally designed, with a pitch of 100 mm and a height of 20% of the channel diameter. The guide ribs 5 on the outer wall of the outer isolation tube 23 are herringbone-shaped, with a main rib spacing of 80 mm and branch ribs distributed at a 45-degree angle. The guide ribs 5 on the outer wall of the inner nozzle tube 31 are wavy, with a wavelength of 30 mm and an amplitude of 15% of the channel diameter. This design can form different water flow patterns in each channel to maximize the cooling effect.

[0105] By introducing the guide ribs 5, the multi-layer cavity fully covered water-cooled robot welding gun of the present application has achieved a significant improvement in cooling effect. Compared with the traditional straight-through water cooling channel, the design of the present application can increase the cooling efficiency by 20% to 30%. Especially in the heat-concentrated areas such as the front end of the welding gun, the temperature can be reduced by 50°C to 80°C. This not only extends the service life of the welding gun components, but also improves the welding quality and production efficiency.

[0106] Compared with the prior art, the design of the guide ribs 5 of the present application has obvious advantages. Traditional water-cooled welding guns usually rely on simple straight water channels for cooling, which is prone to uneven cooling. However, the present application achieves directional control of the water flow by setting guide ribs 5 at multiple key positions, greatly improving the uniformity and efficiency of cooling. In addition, the design of the present application also has the characteristics of simple structure and easy implementation, which will not significantly increase the manufacturing cost and complexity of the welding gun, and has high practical value.

[0107] Preferably, the lengths of the inner ring water channel 25, the gas channel 26 and the outer ring water channel 27 are equal to the length of the double water-cooled gun neck 2, and the length of the nozzle water channel 33 is equal to the length of the water-cooled nozzle 3, thereby achieving full coverage water cooling of the welding gun.

[0108] Specifically, the inner ring water channel 25 and the outer ring water channel 27 run through the entire double water-cooled gun neck 2, which can effectively cool the internal and external structures of the gun neck. The gas channel 26 also extends the entire length of the gun neck, which can not only provide the necessary protective gas, but also assist in cooling to a certain extent. The nozzle water channel 33 is the same length as the water-cooled nozzle 3, ensuring that the front end of the welding gun, which is also the part with the highest temperature, can be fully cooled.

[0109] The advantage of this design is that it enables uniform cooling throughout the entire length of the welding gun. Since the cooling channels are the same length as the corresponding components, the coolant and gas can be evenly distributed throughout the welding gun structure, avoiding the problem of local overheating or insufficient cooling. This not only improves the overall cooling effect of the welding gun, but also extends the service life of the various components of the welding gun and reduces the damage of parts caused by local overheating.

[0110] Furthermore, this design can also optimize the flow path of the coolant. For example, a spiral guide structure can be provided in the inner ring water channel 25 and the outer ring water channel 27 to allow the coolant to flow along the spiral path, thereby increasing the contact area between the coolant and the tube wall, thereby further improving the cooling efficiency.

[0111] As a preferred embodiment, the cross-sectional area of ​​the inner ring water channel 25 and the outer ring water channel 27 can be gradually reduced along the length direction of the gun neck. This design can ensure that the coolant maintains a high flow rate during the flow process, and prevent the cooling effect from decreasing due to too slow a flow rate. At the same time, the cross-sectional area of ​​the gas channel 26 can be kept constant to ensure a stable supply of protective gas.

[0112] In specific implementation, high thermal conductivity materials such as copper alloy or aluminum alloy can be used to make the double water-cooled gun neck 2 and the water-cooled nozzle 3. The inner walls of the inner ring water channel 25 and the outer ring water channel 27 can be polished to reduce the flow resistance of the coolant. The nozzle water channel 33 can adopt a labyrinth structure to increase the residence time of the coolant in the nozzle and improve the cooling effect.

[0113] By adopting this full-length cooling channel design, the welding gun of the present application can maintain a more stable temperature distribution when working continuously for a long time. Compared with the traditional design, the welding gun of the present application can dissipate the heat generated during the welding process more quickly and evenly, effectively preventing local overheating. This not only improves the welding quality and reduces welding defects caused by uneven temperature, but also significantly extends the service life of various parts of the welding gun and reduces maintenance costs and replacement frequency.

[0114] Compared with the prior art, the design of the present application has obvious advantages in the uniformity and durability of the cooling effect. Conventional welding guns usually only have cooling channels in local areas, which is prone to uneven cooling. However, the present application achieves comprehensive cooling from the gun neck to the nozzle through the design of the full-length cooling channel, greatly improving the overall performance and reliability of the welding gun. This improvement not only improves welding efficiency and quality, but also provides better protection for the long-term continuous operation of the automated production line.

[0115] Preferably, flow rate sensors and temperature sensors are provided in the inner ring water channel 25 , the outer ring water channel 27 and the nozzle water channel 33 to monitor the water flow velocity and temperature in the inner ring water channel 25 , the outer ring water channel 27 and the nozzle water channel 33 .

[0116] Specifically, the flow rate sensor and the temperature sensor are installed in the inner ring waterway channel 25, the outer ring waterway channel 27 and the nozzle waterway channel 33 respectively. The arrangement positions of these sensors can be adjusted according to actual needs to obtain the best monitoring effect. For example, the sensors can be installed at the waterway inlet and outlet, or in the middle of the waterway.

[0117] The flow rate sensor is used to measure the flow rate of the coolant in each water channel. By monitoring the flow rate data in real time, it is possible to detect problems such as blockage or leakage in the water channel in a timely manner. If the flow rate of a water channel suddenly decreases, it may mean that the water channel has an abnormality and needs to be inspected and maintained in a timely manner.

[0118] The temperature sensor is used to measure the temperature change of the coolant in each water channel. By monitoring the temperature data, the efficiency of the cooling system can be evaluated. If the temperature of a water channel rises abnormally, it may indicate that the heat dissipation effect in that area is not good, and it is necessary to adjust the coolant flow or check whether there is a problem of heat accumulation.

[0119] The data collected by these sensors can be transmitted to the control unit in real time through the data acquisition system. The control unit can analyze and judge based on these data, thereby realizing intelligent management of the welding gun cooling system. For example, when it is detected that the temperature of a certain water channel is too high, the system can automatically increase the flow of coolant or reduce the welding power to prevent the welding gun from overheating.

[0120] As a preferred embodiment, a flow rate sensor and a temperature sensor can be installed at the inlet and outlet of each water channel. In this way, the cooling effect of each water channel can be more accurately evaluated by comparing the inlet and outlet data. For example, the temperature difference between the inlet and outlet can reflect the heat dissipation capacity of the water channel, and the change in flow rate can indicate whether there is a risk of water channel blockage.

[0121] In addition, the data from these sensors can also be used to build a working status model of the welding gun. By collecting and analyzing this data over a long period of time, the maintenance needs of the welding gun can be predicted and a more scientific maintenance plan can be formulated, thereby extending the service life of the welding gun and reducing downtime caused by equipment failure.

[0122] Compared with the prior art, the technical solution of the present application has significant advantages. Traditional robot welding guns usually lack real-time monitoring capabilities, and it is difficult for operators to detect abnormal conditions in the cooling system in a timely manner. However, the present application achieves comprehensive monitoring of the cooling system by setting flow rate and temperature sensors in multiple water channels. This not only improves the safety and reliability of the welding gun, but also provides a data basis for the precise control of the welding process, which helps to improve welding quality and production efficiency.

[0123] Preferably, a wire feed tube is provided in the inner tube 21, and the robot welding gun further comprises a conductive nozzle 6, which is installed at the front end of the gun neck through a conductive tube 7, and the conductive nozzle 6 is connected to the wire feed tube, and an air outlet 71 communicating with the air path 26 is provided on the conductive tube 7, and a plurality of air outlets 71 are provided and evenly distributed along the circumferential direction of the conductive tube 7. The conductive nozzle is directly installed on the conductive tube, which shortens the distance between the conductive nozzle and the gun neck, and makes the conductive nozzle closer to the inner ring water path. Compared with the existing conductive nozzle installation method, the service life of the conductive nozzle can be extended by 20%-30%.

[0124] Specifically, the wire feeding tube is arranged in the inner tube 21, which can protect the welding wire from the influence of the external environment and reduce the deformation and damage of the welding wire during the transportation process. The conductive nozzle 6 is installed at the front end of the gun neck through the conductive tube 7 and connected with the wire feeding tube to form a complete welding wire transportation channel. This design can ensure the smooth transportation of the welding wire from the wire feeder to the welding point and reduce the problems of wire jamming and wire breakage.

[0125] The multiple gas outlet holes 71 opened on the conductive tube 7 are connected to the gas path 26, and the protective gas can be uniformly delivered to the welding area. The gas outlet holes 71 are evenly distributed along the circumferential direction of the conductive tube 7, and can form a uniform gas protective cover, effectively isolating the air, preventing oxidation and nitridation reactions during welding, and improving welding quality.

[0126] For example, the conductive tube 7 can be designed to be cylindrical, with a diameter of 20 mm and a height of 15 mm. Eight gas outlet holes 71 can be evenly opened in its circumference, and the diameter of each gas outlet hole 71 is 1 mm. This design can ensure uniform distribution of gas without affecting the structural strength of the conductive tube 7.

[0127] Furthermore, the wire feeding tube can be made of wear-resistant materials, such as a ceramic-lined metal tube, and the inner diameter can be selected according to the diameter of the welding wire, which is usually 0.2-0.5mm larger than the diameter of the welding wire. This can reduce the friction of the welding wire during transportation and extend the service life of the wire feeding tube.

[0128] The conductive tip 6 can be made of copper alloy material, which has good conductivity and heat dissipation. Its inner hole diameter can be selected according to the diameter of the welding wire, which is usually 0.1-0.2mm larger than the diameter of the welding wire. The shape of the conductive tip 6 can be designed to be conical for easy replacement and installation.

[0129] As a preferred embodiment, the gas passage 26 can be designed to be annular and arranged around the wire feeding tube. This design can ensure uniform gas distribution without affecting the delivery of the welding wire. The cross-sectional area of ​​the gas passage 26 can be designed according to the required gas flow rate, for example, it can be set to 50-100mm 2 .

[0130] Therefore, the technical solution of the present application realizes smooth delivery of welding wire and uniform distribution of shielding gas by rationally arranging the wire feeding tube, the conductive nozzle 6 and the gas outlet 71. This design not only improves the welding quality, but also increases the service life of the welding gun. Compared with the prior art, the solution of the present application optimizes the welding wire delivery and gas shielding system while ensuring the cooling effect, and significantly improves the welding efficiency and quality.

[0131] Specifically, conventional robot welding guns usually design the wire feeding tube and the gas path as one path, which easily leads to unstable wire feeding and uneven gas protection. However, the present application sets the wire feeding tube in the inner tube 21 and evenly distributes the gas through multiple gas outlets 71 on the conductive tube 7, thus solving these problems. This integrated design not only simplifies the structure of the welding gun, but also improves the collaborative working efficiency of various systems.

[0132] Preferably, the water-cooling nozzle 3 further comprises a nozzle head 34, which is threadedly connected to the outer nozzle tube 32, so that the nozzle head 34 can be easily replaced. This design realizes the detachable structure of the water-cooling nozzle 3 by threading the nozzle head 34 to the outer nozzle tube 32. The nozzle head 34, as the front-end component of the welding gun, is directly exposed to the high-temperature environment during the welding process, and is prone to wear and damage. Through the threaded connection, the nozzle head 34 can be easily disassembled and replaced without replacing the entire water-cooling nozzle 3 assembly.

[0133] Specifically, the nozzle head 34 can be designed to have a threaded structure that matches the front end of the outer nozzle tube 32. When the nozzle head 34 needs to be replaced, the old nozzle head 34 only needs to be screwed off and then a new nozzle head 34 needs to be screwed on. This design not only simplifies the maintenance process, but also reduces the replacement cost, because only the small component of the nozzle head 34 needs to be replaced, rather than the entire water-cooling nozzle 3.

[0134] In addition, the threaded connection also provides good sealing performance. In a high temperature and high pressure welding environment, the threaded connection can ensure a tight fit between the nozzle head 34 and the outer nozzle tube 32 to prevent leakage of coolant or welding gas. At the same time, the threaded connection is also convenient for adjusting the position of the nozzle head 34 to adapt to different welding requirements.

[0135] As a preferred embodiment, the nozzle head 34 can be made of a high temperature resistant and wear resistant material, such as a copper alloy or a special steel. The interior of the nozzle head 34 can be designed as a water channel that matches the internal structure of the outer nozzle tube 32 to ensure that the coolant can fully cool the front end of the nozzle head 34. The exterior of the nozzle head 34 can be designed into a shape suitable for a specific welding process, such as a conical or flat shape.

[0136] In practical applications, multiple nozzle heads 34 of different specifications or materials can be prepared to adapt to different welding processes and materials. The operator can quickly replace the nozzle head 34 as needed, which greatly improves the flexibility and adaptability of the welding equipment. For example, a small-caliber nozzle head 34 can be used for thin plate welding, while a large-caliber nozzle head 34 can be used for thick plate welding.

[0137] By adopting this detachable nozzle head 34 design, the multi-layer cavity fully covered water-cooled robot welding gun of the present application has been significantly improved in terms of maintainability and service life. Compared with the traditional integrated water-cooled nozzle 3, the design of the present application greatly reduces the replacement cost and time, and reduces the downtime caused by nozzle damage. At the same time, since the nozzle head 34 can be replaced in a targeted manner, the stability of the welding quality is also improved.

[0138] Compared with the prior art, the detachable design of the nozzle head 34 of the present application has obvious advantages. Conventional welding gun nozzles usually adopt a fixed design. Once damaged, the entire nozzle assembly needs to be replaced, which is not only costly but also complicated. The design of the present application achieves quick replacement through simple threaded connection, greatly improving the maintainability and economy of the equipment. In addition, this design also provides more application flexibility for the welding gun, and different types of nozzle heads 34 can be quickly replaced according to different welding requirements, which is difficult to achieve in the traditional fixed nozzle design.

[0139] When the above-mentioned multi-layer cavity fully covered water-cooled robot welding gun is used, by opening an inner ring water channel 25 and an outer ring water channel 27 on the double water-cooled gun neck 2, double-layer water cooling of the welding gun neck is achieved, which can cool the inner tube 21 and the outer tube 24, thereby improving the water cooling efficiency and water cooling quality. By opening a nozzle water channel 33 in the water-cooled nozzle 3, water cooling of the front end of the welding gun is achieved, improving the welding quality and the service life of welding parts, so that the robot welding gun can work 24 hours a day and improve work efficiency.

[0140] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A multi-layer cavity fully covered water-cooled robot welding gun, characterized in that: include: a housing mounted to the robotic arm; A double water-cooled gun neck, the double water-cooled gun neck is mounted to the front end of the shell, the double water-cooled gun neck comprises an inner tube, an inner isolation tube, an outer isolation tube and an outer tube from the inside to the outside, an inner ring water channel is formed between the inner tube and the inner isolation tube, an air channel is formed between the inner isolation tube and the outer isolation tube, and an outer ring water channel is formed between the outer isolation tube and the outer tube; A water-cooled nozzle is installed at the front end of the double water-cooled gun neck, and the water-cooled nozzle includes an inner nozzle tube and an outer nozzle tube, a nozzle water channel is formed between the inner nozzle tube and the outer nozzle tube, and the nozzle water channel is connected to the outer ring water channel.

2. A multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: Separation ribs are arranged in the inner ring water channel, the gas channel, the outer ring water channel and the nozzle water channel. The separation ribs separate the inner ring water channel into an inner water inlet area and an inner water outlet area, the separation ribs separate the outer ring water channel into an outer water inlet area and an outer water outlet area, and the separation ribs separate the nozzle water channel into a nozzle water inlet area and a nozzle water outlet area. The liquid in the chiller flows back to the chiller through the inner water inlet area, the inner water outlet area, the outer water inlet area, the nozzle water inlet area, the nozzle water outlet area and the outer water outlet area in sequence.

3. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 2, characterized in that: The separation ribs are fixedly arranged between the inner tube and the inner isolation tube, between the inner isolation tube and the outer isolation tube, between the outer isolation tube and the outer tube, and between the inner nozzle tube and the outer nozzle tube; A plurality of separation ribs are evenly arranged along the circumferential direction of the double water-cooling gun neck and the water-cooling nozzle.

4. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 2, characterized in that: The inner water inlet area and the inner water outlet area are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooled gun neck, and the outer water inlet area and the outer water outlet area are symmetrically distributed and have the same volume relative to the cross section passing through the center line of the double water-cooled gun neck.

5. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 2, characterized in that: The shell is provided with a water inlet joint connected to the inner water inlet area, a water outlet joint connected to the outer water area, and an air inlet joint connected to the air path, the chiller is connected to the water inlet joint and the water outlet joint respectively, and the robot welding gun also includes an air supply device connected to the air inlet joint; The inner nozzle tube is provided with a water inlet hole connected to the outer water inlet area and a water outlet hole connected to the outer water outlet area. There are multiple water inlet holes and multiple water outlet holes, and they are evenly distributed along the circumferential direction of the inner nozzle tube.

6. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: The outer wall of the inner tube, the outer wall of the outer isolation tube and the outer wall of the inner nozzle tube are all provided with guide ribs, and the guide ribs can change the flow direction of liquid in the inner ring waterway channel, the outer ring waterway channel and the nozzle waterway channel.

7. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: The lengths of the inner ring water channel, the gas channel and the outer ring water channel are equal to the length of the double water-cooled gun neck, and the length of the nozzle water channel is equal to the length of the water-cooled nozzle.

8. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: Flow rate sensors and temperature sensors are provided in the inner ring water channel, the outer ring water channel and the nozzle water channel.

9. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: A wire feeding tube is arranged in the inner tube, and the robot welding gun also includes a conductive nozzle, which is installed at the front end of the gun neck through a conductive tube, and the conductive nozzle is connected to the wire feeding tube. An air outlet hole connected to the air path is opened on the conductive tube, and the air outlet holes are provided in plurality and are evenly distributed along the circumferential direction of the conductive tube.

10. The multi-layer cavity fully covered water-cooled robot welding gun according to claim 1, characterized in that: The water-cooling nozzle also includes a nozzle head, and the nozzle head is threadedly connected to the outer nozzle pipe.

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