Resistance welding apparatus for metal working

Abstract

The application belongs to the technical field of machining and welding, and discloses a resistance welding device for metal machining, which comprises a welding device, and a cleaning assembly is installed on the welding device. In the application, the welding head automatically reaches the cleaning station along the first electric guide rail, the two side clamps are synchronously moved inward under the drive of the annular electric guide rail, the cleaning brush and the scraper on the L-shaped plate are attached to the outer wall of the welding head, the micro water pump is synchronously started, the cleaning liquid in the water storage tank is sprayed to the surface of the welding head from the spray hole through the conveying pipe, the angle of the cleaning brush and the scraper can be adjusted and the cleaning brush and the scraper can rotate, the surface welding slag and splashes are scraped off, the water storage tank slides along the annular guide rail during cleaning, the L-shaped plate moves around the circumference of the welding head under the drive of the magnetic block, omnidirectional and dead-angle-free cleaning is realized, after cleaning is completed, the L-shaped plate is turned over under the drive of the rotating shaft, the cleaning part is separated from the welding head and is reset under the magnetic attraction of the magnetic block, automatic operation is realized, the cleaning effect is stable, the safety hidden danger of manual operation is eliminated, and the welding slag and splashes can be completely removed.

Description

Technical Field

[0001] This invention belongs to the field of processing and welding technology, specifically a resistance welding device for metal processing. Background Technology

[0002] Resistance welding is widely used as a mature and efficient joining method in various metal processing techniques. Its core principle is to utilize the concentrated heat generated by the contact resistance when current passes through the contact surfaces of two metal workpieces, which rapidly heats the metal materials in the contact area to a molten or plastic state, and achieves a strong metallurgical bond under the application of a certain pressure. This welding technology has significant advantages, including a high degree of automation and fast operation speed, resulting in outstanding welding efficiency. At the same time, due to the relatively concentrated heat-affected zone, the welded joints are usually aesthetically pleasing, have reliable strength, and stable quality. In addition, compared with some fusion welding processes, its overall energy consumption is relatively low, meeting the needs of energy-saving production. Resistance welding plays an important role in many key areas of modern industry.

[0003] CN119870843B discloses a welding device for processing metal parts, including a main body. A lifting moving arm is fixedly connected to the top of the main body, and a welding head is provided on the left side of the lifting moving arm. A welding table is fixedly connected to the top of the left side of the main body, and a workpiece fixing mechanism is provided at the top of the welding table. The workpiece fixing mechanism consists of two sets, which are respectively located on the front and rear sides of the top of the welding table. The workpiece fixing mechanism includes a main fixing module, a combination module, a release module, and a positioning module. The combination module is located inside the main fixing module, and the release module is located at the top of the combination module. Through the structural design of the workpiece fixing mechanism, metal parts of different specifications, shapes, and volumes can be fixed, and the metal parts can be welded stably, avoiding the occurrence of incomplete welding and misaligned welding.

[0004] In the aforementioned technical solutions, although the specially designed workpiece fixing mechanism can effectively adapt to and stably clamp various metal parts of different specifications, shapes, and volumes, thus meeting the fixing needs of diverse workpieces to a certain extent, in actual welding operations, due to the splashing of high-temperature molten metal, a large number of fine metal particles are often sputtered from the area around the weld point. These splashed particles adhere to and accumulate on the workpiece surface, causing the originally smooth surface to become rough and uneven. At the same time, it can also cause local material defects and form a contamination layer on the workpiece surface. This phenomenon not only significantly reduces the surface finish and overall appearance quality of the workpiece, but also causes continuous wear and adverse effects on the welding electrode, which may in turn affect the stability of the welding process and the reliability of the final product. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides a resistance welding apparatus for metal processing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a resistance welding device for metal processing, comprising a welding device, the welding device comprising a support, a base fixedly connected to the top of the support, a first electric guide rail fixedly connected to the side of the base, and a welding head slidably connected on the first electric guide rail;

[0007] The cleaning assembly includes a connecting block slidably connected to a first electric guide rail via a sliding base, and a welding head mounted at the bottom of the connecting block. An annular guide rail is fitted onto the surface of the connecting block, and a water tank slidably connected to the annular guide rail. The water tank is filled with cleaning fluid. An annular electric guide rail fitted onto the surface of the welding head is fixedly connected to the bottom of the connecting block. A set of clamping plates is slidably connected to the annular electric guide rail. An L-shaped plate is rotatably connected to the inner wall of the set of clamping plates via a rotating shaft. Several spray holes are opened on the L-shaped plate near the welding head. Cleaning brushes and scrapers located on both sides of the spray holes are fixedly connected to the L-shaped plate near the welding head, and the cleaning brushes and scrapers contact the side wall of the welding head. The water tank and the L-shaped plate are connected via a delivery pipe. A magnetic block corresponding to the L-shaped plate is fixedly connected to the bottom of the water tank, and the L-shaped plate and the magnetic block are magnetically attracted to each other.

[0008] Preferably, the cleaning brush is a wire brush and the scraper is a steel plate.

[0009] Preferably, the water tank has a water inlet at the top, and the water inlet is internally threaded with a sealing cap.

[0010] Preferably, the water storage tank has an outlet at the bottom, and a solenoid valve is installed at the connection between the delivery pipe and the outlet.

[0011] Preferably, the bottom of the magnetic block is designed at an angle, and the L-shaped plate is a sheet metal box.

[0012] Preferably, the bracket is equipped with a recycling assembly located inside the base. The recycling assembly includes a pair of second electric guide rails fixed to the top of the bracket, and the second electric guide rails are located between the inner walls of the base.

[0013] Preferably, a recycling bin is slidably connected to the second electric guide rail via a slide block, and an extension bucket is fixedly connected above the end of the recycling bin near the welding head.

[0014] Preferably, the extension bucket is positioned below the welding head after moving towards the welding head via the second electric guide rail.

[0015] Preferably, a protective barrier is fixedly connected to the top of the base, and the protective barrier is made of transparent high-temperature resistant acrylic material, with an openable operation window on the protective barrier.

[0016] Preferably, a miniature water pump is fixedly installed on the side wall of the connecting block, the input end of the miniature water pump is connected to the water storage tank, and the output end is connected to the delivery pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] After the welding operation is completed, the welding head automatically moves to the cleaning station along the first electric guide rail. The annular electric guide rail drives the clamping plates on both sides to move inward synchronously, so that the cleaning brush and scraper on the L-shaped plate are in close contact with the outer wall of the welding head. At the same time, the micro water pump starts, and the cleaning liquid in the water tank is evenly sprayed onto the surface of the welding head through the delivery pipe and the spray hole. The cleaning brush and scraper can be adjusted in angle and rotate in coordination to scrape and wash the welding slag and spatter on the surface of the welding head. During the cleaning operation, the water tank slides smoothly along the annular guide rail and drives the L-shaped plate to move around the welding head in a circular motion through magnetic attraction, so as to achieve a comprehensive and thorough cleaning of the welding head in all directions. After cleaning, the rotating shaft drives the L-shaped plate to flip upward, so that the cleaning brush and scraper are detached from the welding head and magnetically fixed and reset with the magnetic block. This device adopts a fully automatic cleaning mode, which eliminates the need for manual cleaning of the welding head. The cleaning effect is stable and uniform, avoiding the safety hazards of manual operation. It can thoroughly remove residual welding slag and spatter from the surface of the welding head, preventing residue from adhering and affecting the accuracy of subsequent welding processing and the quality of finished products. It has a high degree of automation, comprehensive cleaning, and is safe and reliable to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the welding device of the present invention;

[0021] Figure 3 This is a schematic diagram of the cleaning component of the present invention;

[0022] Figure 4 This is a cross-sectional schematic diagram of the water storage tank of the present invention;

[0023] Figure 5 This is a schematic diagram of the L-shaped plate installation of the present invention;

[0024] Figure 6 This is a schematic diagram of the cleaning brush and scraper of the present invention;

[0025] Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0026] In the picture:

[0027] 1. Welding device; 101. Support; 102. Base; 103. First electric guide rail; 104. Welding head; 2. Cleaning assembly; 201. Connecting block; 202. Water tank; 203. Circular guide rail; 204. Circular electric guide rail; 205. L-shaped plate; 206. Conveying pipe; 207. Cleaning brush; 208. Solenoid valve; 209. Water inlet; 210. Sealing cover; 211. Clamping plate; 212. Magnetic block; 213. Scraper; 214. Spray hole; 215. Rotating shaft; 3. Recycling assembly; 301. Second electric guide rail; 302. Recycling box; 303. Extension bucket; 4. Protective enclosure. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figures 1 to 7 As shown, the present invention provides a resistance welding apparatus for metal processing, including a welding apparatus 1, on which a cleaning component 2 is installed;

[0030] Welding device 1 includes a bracket 101, a base 102 is fixedly connected to the top of the bracket 101, a first electric guide rail 103 is fixedly connected to the side of the base 102, and a welding head 104 is slidably connected on the first electric guide rail 103.

[0031] The cleaning component 2 includes a connecting block 201 slidably connected to the first electric guide rail 103 via a slide block, and a welding head 104 mounted on the bottom end of the connecting block 201. An annular guide rail 203 is fitted onto the surface of the connecting block 201, and a water tank 202 is slidably connected to the annular guide rail 203. The water tank 202 is filled with cleaning fluid. An annular electric guide rail 204 fitted onto the surface of the welding head 104 is fixedly connected to the bottom end of the connecting block 201. A set of clamping plates 211 is slidably connected to the annular electric guide rail 204, and the inner walls of the set of clamping plates 211 are rotatably connected via a rotating shaft 215. An L-shaped plate 205 is provided, with several spray holes 214 at one end of the L-shaped plate 205 near the welding head 104. A cleaning brush 207 and a scraper 213 located on both sides of the spray holes 214 are fixedly connected to the end of the L-shaped plate 205 near the welding head 104, and the cleaning brush 207 and the scraper 213 are in contact with the side wall of the welding head 104. A water tank 202 is connected to the L-shaped plate 205 through a delivery pipe 206. A magnetic block 212 located corresponding to the L-shaped plate 205 is fixedly connected to the bottom of the water tank 202, and the L-shaped plate 205 and the magnetic block 212 are magnetically attracted to each other.

[0032] A miniature water pump is fixedly installed on the side wall of the connecting block 201. The input end of the miniature water pump is connected to the water storage tank 202, and the output end is connected to the delivery pipe 206.

[0033] Using the above scheme: After the welding operation is completed, the welding head 104 can be automatically moved to the designated cleaning station along the first electric guide rail 103. Then, the annular electric guide rail 204 drives the clamping plates 211 on both sides to move inward synchronously, so that the cleaning brush 207 and scraper 213 installed on the L-shaped plate 205 are tightly attached to the outer wall of the welding head 104. At the same time, the micro water pump is started, and the cleaning liquid pre-stored in the water tank 202 is pumped to the spray hole 214 on the L-shaped plate 205 through the delivery pipe 206, and evenly sprayed on the surface of the welding head 104. By adjusting the angle and coordinating the rotation of the cleaning brush 207 and scraper 213, the welding slag and spatter attached to the surface of the welding head 104 can be effectively scraped and brushed.

[0034] During the cleaning process, the water tank 202 can slide smoothly along the annular guide rail 203. With the help of magnetic attraction, the L-shaped plate 205 is driven to move around the welding head 104 in a circular motion, thereby achieving comprehensive cleaning of the surface of the welding head 104 in all directions. After the cleaning process is completed, the L-shaped plate 205 is rotated upward by the rotating shaft 215, and the cleaning brush 207 and scraper 213 are removed from the welding head 104, so that they are magnetically attracted and fixed to the magnetic block 212.

[0035] This automated cleaning mechanism eliminates the need for manual cleaning of the welding head 104, ensuring a stable and reliable cleaning effect and significantly reducing potential safety hazards during operation. It also thoroughly removes residual welding slag, preventing it from adversely affecting the processing quality of subsequent welding processes.

[0036] like Figures 3 to 4 As shown, the cleaning brush 207 is a wire brush, the scraper 213 is a steel plate, the top of the water tank 202 has a water inlet 209, the water inlet 209 is internally threaded with a sealing cap 210, the bottom of the water tank 202 has a water outlet, and a solenoid valve 208 is installed at the connection position between the delivery pipe 206 and the water outlet. The bottom of the magnetic block 212 is designed with an angle, and the L-shaped plate 205 is a sheet metal box.

[0037] Using the above solution: After the L-shaped plate 205 is rotated and stored, it can be tightly and stably attached to the surface of the magnetic block 212, achieving a precise and reliable positioning and storage effect. This ensures that the welding process will not be interfered with by any shaking or accidental displacement during the welding operation. The structural design of the water inlet 209 allows for convenient replenishment of cleaning fluid into the water tank 202 at any time, thereby effectively maintaining the continuity and stability of the cleaning operation and avoiding interruption of the cleaning process due to insufficient fluid. The sealing cap 210, through its reliable sealing performance, effectively prevents accidental spillage or splashing of cleaning fluid during the cleaning operation, strongly ensuring the overall cleanliness of the working environment and operational safety. The solenoid valve 208 can precisely control the cleaning fluid. The precise timing and volume of the delivery, combined with the efficient and stable pumping action of the micro water pump, not only significantly avoids unnecessary waste of cleaning fluid, but also ensures that the amount of liquid sprayed each time is just right, fully meeting the actual cleaning needs without causing overflow or accumulation due to excessive liquid. The cleaning brush 207, made of high-strength steel wire, and the sturdy steel scraper 213 have excellent wear and deformation resistance. Even in long-term, high-intensity welding slag scraping operations, they are not prone to wear or deformation, thus significantly extending their overall service life, reducing the frequency and cost of frequent replacement of cleaning parts, and better adapting to the stringent actual needs of high-frequency, high-intensity cleaning operations in industrial welding scenarios.

[0038] like Figures 1 to 2 As shown, a recycling assembly 3 located inside the base 102 is installed on the bracket 101. The recycling assembly 3 includes a pair of second electric guide rails 301 fixed to the top of the bracket 101. The second electric guide rails 301 are located between the inner walls of the base 102. A recycling box 302 is slidably connected to the second electric guide rails 301 via a slide block. An extension bucket 303 is fixedly connected above the end of the recycling box 302 near the welding head 104. After the extension bucket 303 moves in the direction near the welding head 104 via the second electric guide rails 301, it is located below the welding head 104.

[0039] The above solution works as follows: After the welding operation is completed, the second electric guide rail 301 can move the recycling box 302 and its connected extension bucket 303 together, accurately positioning it directly below the welding head 104. Then, the welding head 104 moves downward to begin the cleaning operation. During this process, the scraped welding slag and splashed cleaning fluid will slide directly down the slope of the extension bucket 303 and flow into the recycling box 302 below. This achieves centralized collection and containment of waste residue and waste liquid, effectively preventing welding slag and waste liquid from scattering and falling onto the surface of the base 102 or the external area of ​​the equipment. This significantly reduces the workload of subsequent manual cleaning of the surrounding environment. When it is necessary to clean up the recycled debris, the second electric guide rail 301 can be used to move the entire recycling box 302 out of the area where the base 102 is located, allowing for quick dumping and disposal of debris. The entire process is convenient, time-saving, and labor-saving. It not only effectively maintains the cleanliness and orderliness of the equipment interior but also reduces the negative impact on the overall service life of the device caused by long-term accumulation of debris, which is conducive to the long-term stable operation of the equipment.

[0040] like Figure 1 As shown, a protective barrier 4 is fixedly connected to the top of the base 102, and the protective barrier 4 is made of transparent high-temperature resistant acrylic material. An openable operation window is provided on the protective barrier 4.

[0041] By adopting the above solution, the protective enclosure 4 can effectively separate the welding operation area of ​​the welding device 1 from the external environment, thereby significantly blocking the slag spatter and arc radiation generated during the welding process. This design not only prevents unauthorized personnel from accidentally entering or touching the work area and ensuring the safety of the surrounding area, but also significantly reduces the potential damage of arc light to the eyes and skin of the operators. At the same time, the transparent material used allows the operators to clearly observe the real-time status of the welding operation at any time, ensuring that the operator's field of vision is not affected. In addition, the openable operation window equipped on the enclosure provides convenience for the welding process, allowing the operator to flexibly adjust the position of the workpiece when necessary, thereby ensuring the safety of the operation while taking into account the convenience and flexibility of the operation.

[0042] Working principle and usage process of this invention:

[0043] First, the metal workpiece to be welded must be precisely positioned and firmly fixed on the preset welding position of the base 102 to ensure its accuracy and stability throughout the welding process, avoiding any deviation or shaking. Then, the operating window of the protective enclosure 4 should be closed immediately to effectively isolate the work area, thereby ensuring the safety of the operators and preventing potential impacts from the external environment. Next, the first electric guide rail 103 starts, smoothly and precisely driving the welding head 104 to move along the preset path until it accurately reaches the welding position of the workpiece. At this time, the resistance welding equipment is started, and efficient and precise processing is carried out by precisely controlling the current and pressure, ensuring that the strength and quality of the weld point fully meet the strict process requirements, and ultimately achieving a reliable and consistent welding effect.

[0044] After the welding process is successfully completed, the first electric guide rail 103 will strictly follow the preset program instructions to smoothly move the welding head 104 away from the workpiece surface and accurately guide it to the dedicated cleaning station along the predetermined trajectory. At the same time, the second electric guide rail 301 will start synchronously, precisely driving the recycling box 302 and its front-end extension bucket 303 to move together, so that it can be quickly and accurately positioned directly below the welding head 104, so as to receive various waste materials such as welding slag and spatter generated during the subsequent cleaning process. Then, the annular electric guide rail 204 will start, driving the clamping plate 211 mechanism to gradually and smoothly move inward. Through precise displacement control, the cleaning brush 207 and scraper 213 can completely fit the surface contour of the welding head 104, making full preparations for the next efficient and thorough cleaning work.

[0045] Next, under precise control, the water tank 202 slides smoothly and continuously along the preset annular guide rail 203. Its movement is smooth and without jamming. Through a carefully designed magnetic coupling mechanism, the water tank 202 can stably and reliably drive the L-shaped plate 205 fixed to it, so that it can rotate around the axis of the welding head 104 at a constant speed. During this synchronous rotation, the micro water pump and high-response solenoid valve 208 integrated in the system are precisely and collaboratively triggered and started. They pump out the special cleaning liquid that has been pre-mixed in proportion in the water tank 202 with controlled pressure and flow rate, and deliver it through pipeline to the reasonably distributed array of nozzles 214. The nozzles 214 then spray the cleaning liquid in a uniform, fine and comprehensive mist or jet form with optimized spray angle and atomization effect, and fully wet the entire outer surface of the welding head 104.

[0046] Simultaneously, the sprayed cleaning fluid works in close combination with the mechanical action of the synchronously moving flexible cleaning brush 207 and the scraper 213 with a scraping function. The cleaning brush 207 removes softened dirt by rotating or reciprocating, while the scraper 213 removes more stubborn deposits. This organic combination of chemical cleaning and physical brushing forms a highly efficient composite cleaning mechanism, thereby achieving a thorough cleaning of the surface and complex contours of the welded head 104 without any blind spots, ensuring the effective removal of all welding slag and spatter remaining after welding operations. Other process stains, the mixture of stripping waste and post-use waste liquid generated during the entire cleaning process, are smoothly guided into the carefully arranged extension hopper 303 below under the action of gravity and flow guidance design, and quickly collected into the sealed recycling bin 302 located directly below it. This realizes the centralized collection of waste and provides convenience for subsequent unified treatment or recycling. In this way, it fundamentally avoids the environmental pollution problems that may be caused by waste splashing or liquid overflow, and also maintains the cleanliness and order of the work area, which meets the requirements of modern green manufacturing and safe production standards.

[0047] After all cleaning is completed, the L-shaped plate 205 will flip upwards and be securely stored in the magnetic block 212 to save space and keep the equipment tidy. Then, the second electric guide rail 301 will move the recycling box 302 out of the cleaning area, making it convenient for staff to directly pour out the collected waste residue and waste liquid for subsequent processing. Finally, the operation window of the protective enclosure 4 will be opened to safely remove the welded and cleaned metal workpiece. At this point, the entire welding process and subsequent cleaning process are successfully completed, and the equipment will automatically return to standby mode to be fully prepared for the next operation.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resistance welding apparatus for metal processing, comprising a welding device (1), characterized in that: The welding device (1) is equipped with a cleaning component (2); The welding device (1) includes a bracket (101), a base (102) is fixedly connected to the top of the bracket (101), a first electric guide rail (103) is fixedly connected to the side of the base (102), and a welding head (104) is slidably connected on the first electric guide rail (103). The cleaning component (2) includes a connecting block (201) slidably connected to a first electric guide rail (103) via a slide block, and a welding head (104) mounted on the bottom end of the connecting block (201). An annular guide rail (203) is fitted on the surface of the connecting block (201), and a water tank (202) is slidably connected to the annular guide rail (203). The water tank (202) is filled with cleaning fluid. An annular electric guide rail (204) fitted on the surface of the welding head (104) is fixedly connected to the bottom end of the connecting block (201). A set of clamping plates (211) is slidably connected to the annular electric guide rail (204), and the inner walls of the set of clamping plates (211) are rotatably connected via a rotating shaft (215). An L-shaped plate (205) is provided, with several spray holes (214) at one end of the L-shaped plate (205) near the welding head (104). A cleaning brush (207) and a scraper (213) located on both sides of the spray holes (214) are fixedly connected to the end of the L-shaped plate (205) near the welding head (104), and the cleaning brush (207) and the scraper (213) are in contact with the side wall of the welding head (104). The water tank (202) is connected to the L-shaped plate (205) through a conveying pipe (206). A magnetic block (212) located corresponding to the L-shaped plate (205) is fixedly connected to the bottom of the water tank (202), and the L-shaped plate (205) and the magnetic block (212) are magnetically attracted to each other.

2. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The cleaning brush (207) is a wire brush, and the scraper (213) is a steel plate.

3. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The water storage tank (202) has a water inlet (209) at the top, and a sealing cap (210) is threaded into the water inlet (209).

4. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The water storage tank (202) has an outlet at the bottom, and a solenoid valve (208) is installed at the connection position between the delivery pipe (206) and the outlet.

5. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The bottom of the magnetic block (212) is designed with an angle, and the L-shaped plate (205) is a sheet metal box.

6. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The bracket (101) is equipped with a recycling component (3) located inside the base (102). The recycling component (3) includes a pair of second electric guide rails (301) fixed to the top of the bracket (101) and the second electric guide rails (301) are located between the inner walls of the base (102).

7. The resistance welding apparatus for metal processing according to claim 6, characterized in that: A recycling bin (302) is slidably connected to the second electric guide rail (301) via a slide block, and an extension bucket (303) is fixedly connected above the end of the recycling bin (302) near the welding head (104).

8. The resistance welding apparatus for metal processing according to claim 7, characterized in that: The extension bucket (303) moves towards the welding head (104) via the second electric guide rail (301) and is located below the welding head (104).

9. The resistance welding apparatus for metal processing according to claim 1, characterized in that: The base (102) is fixedly connected to a protective barrier (4) at its top, and the protective barrier (4) is made of transparent high-temperature resistant acrylic material. The protective barrier (4) has an openable operation window.

10. The resistance welding apparatus for metal processing according to claim 1, characterized in that: A miniature water pump is fixedly installed on the side wall of the connecting block (201). The input end of the miniature water pump is connected to the water storage tank (202), and the output end is connected to the delivery pipe (206).

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