Ultrathin metal ring welding auxiliary device and method

Abstract

The invention discloses an ultrathin metal ring welding auxiliary device and method, and aims to overcome the defect that when an ultrathin metal cooling ring is welded, air inflation protection on the back face is poor, and air holes in a weld joint are caused. The device comprises a main gas-guide tube and a plug, a chuck and a pre-tightening piece which are movably arranged are installed on the main gas-guide tube, the pre-tightening piece abuts against the chuck, the plug is tightly matched with a ring hole in the ultrathin metal ring, the main gas-guide tube is communicated between the chuck and the plug, and a welding ring is pressed between the chuck and the end of the ring hole. According to the ultrathin metal ring welding auxiliary device, the inflation protection effect can be better achieved in the welding process, the penetration performance of single-face welding and double-face forming and the internal forming quality of a welding seam can be guaranteed, and welding seam air holes are reduced.

Description

Technical Field

[0001] The invention relates to a metal ring welding technology, and more particularly to an ultra-thin metal ring welding auxiliary device and method. Background Art

[0002] With the rapid development of the semiconductor industry, the requirements for semiconductor equipment processing and welding are also increasing. Ultra-thin metal cooling rings are one of the important structures in semiconductor equipment. They are mainly made of ultra-thin stainless steel or aluminum alloy after welding and machining. The quality of welding directly affects the cooling effect, processing size, service life and stability. In the process of welding ultra-thin metal cooling rings, the quality of the back gas protection of the weld directly affects the forming and welding quality of the weld, including pores, penetration, etc. Therefore, higher requirements are put forward for the back gas protection of the weld when welding ultra-thin metal cooling rings. Especially when the pipe butt weld and the side joint fillet weld require full penetration and require single-sided welding and double-sided forming, the back gas protection of the weld is particularly important. However, when welding ultra-thin metal cooling rings, the back gas protection is poor, causing pores inside the weld. These pores will directly cause pitting in the weld after polishing. These pitting are not allowed in semiconductor equipment components and will cause the product to be directly scrapped. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides an ultra-thin metal ring welding auxiliary device and method, which can better play the role of inflation protection during the welding process, ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce weld porosity.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: an ultra-thin metal ring welding auxiliary device, including a main air duct and a plug, a movably arranged chuck and a pre-tightening member are installed on the main air duct, the pre-tightening member is pressed against the chuck, the plug is tightly fitted with the ring hole on the ultra-thin metal ring, the main air duct is connected between the chuck and the plug, and the welding ring is pressed between the chuck and the end of the ring hole.

[0005] In the process of welding the ultra-thin metal ring and the welding ring, an ultra-thin metal ring welding auxiliary device is used to assist, which ensures the welding accuracy, and the inflation protection effect is good during the welding process, with less gas consumption and reduced costs. During the welding operation, the ultra-thin metal ring is first clamped and positioned; then the welding ring and the plug are put together; then the main gas guide tube is moved to make the plug tightly inserted into the ring hole on the ultra-thin metal ring, one end of the welding ring is pressed against the end of the ring hole, and the other end of the welding ring is pressed against the chuck. At this time, a protective gas chamber is formed between the plug and the chuck with good sealing; then the protective gas is introduced into the protective gas chamber through the main gas guide tube to realize the inflation protection of the back of the weld; finally, the weld between the welding ring and the end of the ring hole is welded, and the protective gas is always introduced during the welding process.

[0006] The ultra-thin metal ring welding auxiliary device of the patent application can better play the role of inflation protection during the welding process, can ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce weld porosity.

[0007] Preferably, a high silica cloth layer is provided on the side wall of the plug.

[0008] The high-silicon cloth is soft and heat-resistant, ensuring that the plug and the ring hole on the ultra-thin metal ring can be tightly plugged and connected to ensure sealing.

[0009] Preferably, a limit stopper is installed on the main air guide tube, and the chuck is clamped between the limit stopper and the pre-tightening member.

[0010] The limit stopper has a limiting effect on the chuck.

[0011] Preferably, an air core is provided on the main air guide tube, the air core is placed between the plug and the chuck, the air core is a tubular structure, and a plurality of air outlet holes are densely distributed on the side wall of the air core.

[0012] The shielding gas is discharged from the outlet holes on the gas core into the shielding gas chamber. The outlet holes face the weld, and the shielding gas discharged from the outlet holes can directly hit the weld, which has a good welding protection effect. The dense distribution of several outlet holes on the side wall of the gas core can better achieve 360° uniform gas discharge, and can achieve air pressure balance in various parts without causing local high pressure and air roll.

[0013] Preferably, a connecting column is provided on the main air guide tube, and the connecting column and the plug are tightly connected.

[0014] The connection is made through a connecting column and a plug, and the connection is convenient and reliable.

[0015] Preferably, the preload member is a preload spring, a spring seat is connected to the main air guide tube, and the preload member abuts between the spring seat and the chuck.

[0016] The preload spring is used as the preload element, and the preload force provided is stable and reliable. The setting of the spring seat facilitates the installation of the preload spring.

[0017] Preferably, a boss adapted to the welding ring is provided on the end surface of the chuck facing the plug.

[0018] Before welding the welding ring, the welding ring and the boss are inserted and positioned to ensure the accuracy of the welding position and prevent the welding ring from shaking during the welding process.

[0019] Preferably, the chuck is provided with a plurality of small exhaust holes.

[0020] During the welding process, the main air duct continuously introduces shielding gas into the shielding gas chamber, and the shielding gas chamber is filled with shielding gas. After the gas pressure increases, the gas flow is discharged outward from the exhaust hole to avoid excessive pressure in the shielding gas chamber.

[0021] Preferably, the main air guide tube is fastened to the slide plate, the slide plate is connected to the clamping seat, the clamping seat is provided with a clamping groove adapted to the ultra-thin metal ring, the clamping seat is provided with a guide column, the slide plate is slidably connected to the guide column, the guide column is connected to an abutment spring, and the abutment spring abuts against the slide plate.

[0022] During the welding process, first pull the slide plate to fit the ultra-thin metal ring into the clamping groove on the clamping seat for precise positioning. At this time, the relative position of the plug and the ultra-thin metal ring is accurate and reliable. Insert the welding ring onto the plug, then release the slide plate. Under the action of the abutment spring, the plug moves toward the ultra-thin metal ring, and the plug is tightly inserted into the ring hole on the ultra-thin metal ring. One end of the welding ring is pressed against the end of the ring hole, and the other end of the welding ring is pressed against the chuck. This structure is used to set up auxiliary welding operations, so that the welding ring and the ultra-thin metal ring are welded accurately and reliably, which is conducive to improving work efficiency.

[0023] A method for welding an ultra-thin metal ring uses an ultra-thin metal ring welding auxiliary device for auxiliary welding, comprising the following steps: S1, clamping and positioning the ultra-thin metal ring; S2, fitting the welding ring and the plug together; S3, moving a main air guide tube to tightly insert the plug into the ring hole on the ultra-thin metal ring, with one end of the welding ring pressed against the end of the ring hole, and the other end of the welding ring pressed against a chuck, thereby forming a protective gas chamber between the plug and the chuck; S4, introducing protective gas into the protective gas chamber through the main air guide tube; S5, welding the weld between the welding ring and the end of the ring hole.

[0024] During the welding process, the plug is tightly inserted into the ring hole on the ultra-thin metal ring, one end of the welding ring is pressed against the end of the ring hole, and the other end of the welding ring is pressed against the chuck, which realizes the reliable positioning of the welding ring and ensures the accuracy of the relative position of the welding ring and the ultra-thin metal ring. During the welding process, the protective gas is introduced into the protective gas chamber formed between the plug and the chuck to realize the gas inflation protection of the back of the weld, which can ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce the weld porosity.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) the ultra-thin metal ring welding auxiliary device can better play the role of inflation protection during the welding process, which can ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce the weld porosity; (2) during the welding process, protective gas is introduced into the protective gas chamber formed between the plug and the chuck, thereby realizing inflation protection of the back of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the use state of the present invention.

[0028] Figure 3 It is an internal schematic diagram of the present invention in use state.

[0029] Figure 4 It is a cross-sectional view of the usage state of Example 1 of the present invention.

[0030] Figure 5 It is a cross-sectional view of the usage state of Example 2 of the present invention.

[0031] Figure 6 It is a cross-sectional view of the usage state of Example 3 of the present invention.

[0032] Figure 7 The present invention Figure 6 Enlarged view of point A.

[0033] In the figure: 1, main air pipe, 2, plug, 3, air pipe joint, 4, chuck, 5, preload, 6, spring seat, 7, positioning screw, 8, welding ring, 9, ultra-thin metal ring, 10, ring hole, 11, high silica cloth layer, 12, air core, 13, air outlet, 14, connecting column, 15, air pipe body, 16, limit stopper, 17, boss, 18, slide plate, 19, clamping seat, 20, clamping groove, 21 , guide column, 22, abutment spring, 23, end cover, 24, ring groove, 25, rotating column, 26, support, 27, flip motor, 28, driving gear, 29, driven gear ring, 30, partition, 31, piston column, 32, positioning rod, 33, connecting rod, 34, transition hole, 35, return spring, 36, avoidance groove, 37, articulated seat, 38, sliding seat, 39, slide groove, 40, sliding column, 41, positioning head. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings: Embodiment 1: An auxiliary device for welding an ultra-thin metal ring (see attached Figure 1 To Attachment Figure 4), including a main air guide tube 1 and a plug 2, the plug 2 is fastened and installed at one end of the main air guide tube 1, and the other end of the main air guide tube 1 is connected to the air tube through an air pipe joint 3. A movably arranged chuck 4 and a pre-tightening member 5 are installed on the main air guide tube 1, the pre-tightening member 5 is pressed against the chuck 4, a sleeve hole is arranged on the chuck 4, and the chuck 4 is movably fitted with the main air guide tube 1 through the sleeve hole. The pre-tightening member 5 is a pre-tightening spring, which is movably fitted on the main air guide tube 1, and a spring seat 6 is connected to the main air guide tube 1, and the spring seat 6 can slide along the main air guide tube 1, and the pre-tightening member 5 abuts between the spring seat 6 and the chuck 4. A positioning screw 7 is connected to the spring seat 6, and the end of the positioning screw 7 abuts against the outer wall of the main air guide tube 1.

[0035] The plug 2 is tightly fitted with the ring hole 10 on the ultra-thin metal ring 9, the main air guide tube 1 is connected between the chuck 4 and the plug 2, and the welding ring 8 is pressed between the chuck 4 and the end of the ring hole 10. The end of the welding ring 8 is correspondingly fitted with the end of the ring hole 10 on the ultra-thin metal ring 9, and a weld is formed between the two.

[0036] A high-silicon cloth layer 11 is arranged on the side wall of the plug 2. The high-silicon cloth is soft and heat-resistant, ensuring that the plug 2 and the ring hole 10 on the ultra-thin metal ring 9 can be tightly plugged and connected to ensure sealing.

[0037] The main air guide tube 1 is provided with an air core 12, which is placed between the plug 2 and the chuck 4. The air core 12 is a tubular structure, and a plurality of air outlet holes 13 are densely distributed on the side wall of the air core 12. The main air guide tube 1 is provided with a connecting column 14, which is tightly connected to the plug 2.

[0038] The main air guide tube 1 includes an air guide tube body 15, an air core 12, and a connecting column 14. The air core 12 is threadedly connected between the air guide tube body 15 and the connecting column 14. The air outlet holes 13 on the air core 12 are arranged circumferentially to achieve 360° uniform air outlet, which can achieve air pressure balance in various parts without causing local high pressure and air entrainment.

[0039] The main air duct 1 is provided with a limit stopper 16, and the chuck 4 is clamped between the limit stopper 16 and the preload member 5. The chuck 4 and the limit stopper 16 are both installed on the air duct body 15. Both sides of the plug 2 on the connecting column 14 are connected with fastening nuts, and the two fastening nuts are respectively abutted against both sides of the plug 2.

[0040] A boss 17 adapted to the welding ring 8 is arranged on the end surface of the chuck 4 facing the plug 2. The chuck 4 is provided with a plurality of small exhaust holes.

[0041] The main air guide tube 1 is made of stainless steel, mainly considering the long-term use and the wear resistance of the thread. The length of the main air guide tube 1 can be determined according to the actual use of the product. The generally recommended length is 300-1000mm, the inner hole size is between 4mm-10mm in diameter, and the outer diameter size of the main body is between 12mm-22mm. The spring seat 6 is made of 304 stainless steel, mainly used to compress the preload spring and play a limiting role. A limiting step is set on the spring seat 6, and the preload spring abuts against the limiting step. The inner hole size of the limiting step is the outer diameter of the main air guide tube 1 plus about 1mm, ensuring that the spring seat 6 can slide freely on the main air guide tube 1. The preload spring is mainly beneficial to the elasticity of the spring to compress the chuck 4 and can provide an adaptive clamping force. The selection of the spring is mainly based on the external dimensions of the main air guide tube 1. The inner diameter of the spring should be greater than 1-2mm and not greater than the outer diameter of the upper limit step on the spring seat 6. The chuck 4 is relatively heavy due to its large area. Considering the convenience of actual construction, it is made of aluminum alloy. The chuck 4 can be composed of multiple chucks 4, and can be used on pipes of various specifications or can be a single chuck 4. The diameter of the small exhaust holes set on the chuck 4 is between 1.5mm and 3mm to balance the pressure of the protective air chamber. The holes can be arranged in multiple places around the circumference. The schematic diagram only shows 3 evenly distributed small holes. The PCD of the small hole arrangement position is smaller than the inner diameter of the welding ring 8. The limiting step is made according to the size of the preload spring, and the depth is between 1.5mm and 3mm. The limiting block 16 mainly plays the phase role of the chuck 4. The air core 12 is a hollow structure, and multiple air outlet holes 13 are evenly arranged. The internal thread at one end of the air core 12 is connected to the main air guide tube 1, and the external thread at the other end is connected to the connecting column 14. The connecting column 14 mainly serves as a connector between the air core 12 and the plug 2. The structure of the plug 2 can be matched according to the inner diameter size of the welding ring 8 and be 1-2mm smaller than the target size, and then high-silica cloth is wrapped around the plug 2 in the circumferential direction to form a high-silica cloth layer 11, so that the size of the plug 2 is just suitable for the inner diameter size of the ring hole 10 on the ultra-thin metal ring 9. Through the elastic deformation of the high-silica cloth, the inner diameter of the ring hole 10 is closely matched with the plug 2 during welding.

[0042] A method for welding an ultra-thin metal ring, such as Figure 2 , Figure 3 , Figure 4As shown, auxiliary welding is performed using an ultra-thin metal ring 9 welding auxiliary device, including the following steps: S1, clamping and positioning the ultra-thin metal ring 9; S2, fitting the welding ring 8 and the plug 2 together; S3, moving the main air guide tube 1, so that the plug 2 is tightly inserted into the ring hole 10 on the ultra-thin metal ring 9, one end of the welding ring 8 is pressed against the end of the ring hole 10, and the other end of the welding ring 8 is pressed against the chuck 4, at this time, a protective gas chamber is formed between the plug 2 and the chuck 4; S4, a protective gas is introduced into the protective gas chamber through the main air guide tube 1, and the protective gas in this embodiment is argon; S5, welding the weld between the welding ring 8 and the end of the ring hole 10, when welding, first weld several fixed points at intervals in the circumferential direction, so that the welding ring 8 and the end of the ring hole 10 are fixed first, and then complete the welding of all welds. After welding is completed, pull the main air guide tube 1 backward to separate the plug 2 from the welding ring 8.

[0043] During the welding process, the plug 2 is tightly inserted into the ring hole 10 on the ultra-thin metal ring 9, one end of the welding ring 8 is pressed against the end of the ring hole 10, and the other end of the welding ring 8 is pressed against the chuck 4, so that the welding ring 8 is reliably positioned and the relative position accuracy of the welding ring 8 and the ultra-thin metal ring 9 is ensured. During the welding process, protective gas is introduced into the protective gas chamber formed between the plug 2 and the chuck 4, so that the back of the weld is inflated and protected, which can ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce weld porosity.

[0044] Embodiment 2: An ultra-thin metal ring welding auxiliary device (see attached Figure 5 ), including a main air guide tube 1 and a plug 2, the plug 2 is fastened and installed at one end of the main air guide tube 1, and the other end of the main air guide tube 1 is connected to the air tube through an air pipe joint 3. A movably arranged chuck 4 and a pre-tightening member 5 are installed on the main air guide tube 1, the pre-tightening member 5 is pressed against the chuck 4, a sleeve hole is arranged on the chuck 4, and the chuck 4 is movably fitted with the main air guide tube 1 through the sleeve hole. The pre-tightening member 5 is a pre-tightening spring, which is movably fitted on the main air guide tube 1, and a spring seat 6 is connected to the main air guide tube 1, and the spring seat 6 can slide along the main air guide tube 1, and the pre-tightening member 5 abuts between the spring seat 6 and the chuck 4. A positioning screw 7 is connected to the spring seat 6, and the end of the positioning screw 7 abuts against the outer wall of the main air guide tube 1.

[0045] The plug 2 is tightly fitted with the ring hole 10 on the ultra-thin metal ring 9, the main air guide tube 1 is connected between the chuck 4 and the plug 2, and the welding ring 8 is pressed between the chuck 4 and the end of the ring hole 10. The end of the welding ring 8 is correspondingly fitted with the end of the ring hole 10 on the ultra-thin metal ring 9, and a weld is formed between the two.

[0046] A high-silicon cloth layer 11 is arranged on the side wall of the plug 2. The high-silicon cloth is soft and heat-resistant, ensuring that the plug 2 and the ring hole 10 on the ultra-thin metal ring 9 can be tightly plugged and connected to ensure sealing.

[0047] The main air guide tube 1 is provided with an air core 12, which is placed between the plug 2 and the chuck 4. The air core 12 is a tubular structure, and a plurality of air outlet holes 13 are densely distributed on the side wall of the air core 12. The main air guide tube 1 is provided with a connecting column 14, which is tightly connected to the plug 2.

[0048] The main air guide tube 1 includes an air guide tube body 15, an air core 12, and a connecting column 14. The air core 12 is threadedly connected between the air guide tube body 15 and the connecting column 14. The air outlet holes 13 on the air core 12 are arranged circumferentially to achieve 360° uniform air outlet, which can achieve air pressure balance in various parts without causing local high pressure and air entrainment.

[0049] The main air duct 1 is provided with a limit stopper 16, and the chuck 4 is clamped between the limit stopper 16 and the preload member 5. The chuck 4 and the limit stopper 16 are both installed on the air duct body 15. Both sides of the plug 2 on the connecting column 14 are connected with fastening nuts, and the two fastening nuts are respectively abutted against both sides of the plug 2.

[0050] A boss 17 adapted to the welding ring 8 is arranged on the end surface of the chuck 4 facing the plug 2. The chuck 4 is provided with a plurality of small exhaust holes.

[0051] The main air guide tube 1 is made of stainless steel, mainly considering the long-term use and the wear resistance of the thread. The length of the main air guide tube 1 can be determined according to the actual use of the product. The generally recommended length is 300-1000mm, the inner hole size is between 4mm-10mm in diameter, and the outer diameter size of the main body is between 12mm-22mm. The spring seat 6 is made of 304 stainless steel, mainly used to compress the preload spring and play a limiting role. A limiting step is set on the spring seat 6, and the preload spring abuts against the limiting step. The inner hole size of the limiting step is the outer diameter of the main air guide tube 1 plus about 1mm, ensuring that the spring seat 6 can slide freely on the main air guide tube 1. The preload spring is mainly beneficial to the elasticity of the spring to compress the chuck 4 and can provide an adaptive clamping force. The selection of the spring is mainly based on the external dimensions of the main air guide tube 1. The inner diameter of the spring should be greater than 1-2mm and not greater than the outer diameter of the upper limit step on the spring seat 6. The chuck 4 is relatively heavy due to its large area. Considering the convenience of actual construction, it is made of aluminum alloy. The chuck 4 can be composed of multiple chucks 4, and can be used on pipes of various specifications or can be a single chuck 4. The diameter of the small exhaust holes set on the chuck 4 is between 1.5mm and 3mm to balance the pressure of the protective air chamber. The holes can be arranged in multiple places around the circumference. The schematic diagram only shows 3 evenly distributed small holes. The PCD of the small hole arrangement position is smaller than the inner diameter of the welding ring 8. The limiting step is made according to the size of the preload spring, and the depth is between 1.5mm and 3mm. The limiting block 16 mainly plays the phase role of the chuck 4. The air core 12 is a hollow structure, and multiple air outlet holes 13 are evenly arranged. The internal thread at one end of the air core 12 is connected to the main air guide tube 1, and the external thread at the other end is connected to the connecting column 14. The connecting column 14 mainly serves as a connector between the air core 12 and the plug 2. The structure of the plug 2 can be matched according to the inner diameter size of the welding ring 8 and be 1-2mm smaller than the target size, and then high-silica cloth is wrapped around the plug 2 in the circumferential direction to form a high-silica cloth layer 11, so that the size of the plug 2 is just suitable for the inner diameter size of the ring hole 10 on the ultra-thin metal ring 9. Through the elastic deformation of the high-silica cloth, the inner diameter of the ring hole 10 is closely matched with the plug 2 during welding.

[0052] The main air guide tube 1 is fastened to the slide plate 18, and the slide plate 18 is connected to the clamping seat 19. The clamping seat 19 is provided with a clamping groove 20 adapted to the ultra-thin metal ring 9. The clamping seat 19 is provided with a guide column 21, and two guide columns 21 are provided. The slide plate 18 is provided with a sliding hole, and the sliding hole on the slide plate 18 is slidably connected to the guide column 21. The guide column 21 is connected with an abutment spring 22, and the end of the guide column 21 is fastened to the end cover 23, and the end cover 23 is provided with an annular groove 24. The abutment spring 22 is movably sleeved on the guide column 21, and one end of the abutment spring 22 abuts on the slide plate 18, and the other end of the abutment spring 22 abuts in the annular groove 24. The opening edge of the clamping groove 20 is chamfered to facilitate the ultra-thin metal ring 9 to be installed in the clamping groove 20. A rotating column 25 is arranged at one end of the clamping seat 19, and the rotating column 25 is rotatably mounted on a support 26. A flip motor 27 is installed on the support 26. The output shaft of the flip motor 27 is connected to a driving gear 28. A driven gear ring 29 is arranged on the rotating column 25, and the driving gear 28 and the driven gear ring 29 are meshed for transmission.

[0053] During the welding process, first pull the slide plate 18, and fit the ultra-thin metal ring 9 into the clamping groove 20 on the clamping seat 19 for precise positioning. At this time, the relative position of the plug 2 and the ultra-thin metal ring 9 is accurate and reliable. Insert the welding ring 8 onto the plug 2, and then release the slide plate 18. Under the action of the abutment spring 22, the plug 2 moves toward the ultra-thin metal ring 9, and the plug 2 is tightly inserted into the ring hole 10 on the ultra-thin metal ring 9. One end of the welding ring 8 is pressed against the end of the ring hole 10, and the other end of the welding ring 8 is pressed against the chuck 4. This structural setting assists the welding operation, so that the welding ring 8 and the ultra-thin metal ring 9 are welded accurately and reliably, which is conducive to improving work efficiency. During the welding process, the flip motor 27 drives the clamping seat 19 to flip, which is convenient for reliable welding of the entire circle of welds.

[0054] A method for welding an ultra-thin metal ring, such as Figure 5As shown, the auxiliary welding is performed using the ultra-thin metal ring 9 welding auxiliary device, including the following steps: S1, clamping and positioning the ultra-thin metal ring 9; pulling the slide plate 18 backward, and then loading the ultra-thin metal ring 9 into the clamping groove 20 on the clamping seat 19, and positioning is achieved through tight fit; S2, fitting the welding ring 8 and the plug 2 together; S3, moving the main air guide tube 1; releasing the slide plate 18, and under the action of the abutment spring 22, the main air guide tube 1 moves toward the ultra-thin metal ring 9, so that the plug 2 is tightly inserted into the ring hole 10 on the ultra-thin metal ring 9, and one end of the welding ring 8 is aligned with the ring hole 10. 0 ends are pressed together, and the other end of the welding ring 8 is pressed against the chuck 4, and a protective gas chamber is formed between the plug 2 and the chuck 4; S4, a protective gas is introduced into the protective gas chamber through the main body air guide pipe 1. In this embodiment, the protective gas is argon; S5, the weld between the welding ring 8 and the end of the ring hole 10 is welded. During welding, several fixed points are welded at intervals in the circumference to fix the welding ring 8 and the end of the ring hole 10 first, and then the welding of the upper half circle of the weld is completed; then the turning motor 27 drives the clamping seat 19 to turn over, so that the weld of the lower half circle faces upward, and then the welding of the lower half circle of the weld is completed. After the welding is completed, the slide plate 18 is pulled backward to separate the plug 2 from the welding ring 8, and then the ultra-thin metal ring 9 is removed.

[0055] During the welding process, the plug 2 is tightly inserted into the ring hole 10 on the ultra-thin metal ring 9, one end of the welding ring 8 is pressed against the end of the ring hole 10, and the other end of the welding ring 8 is pressed against the chuck 4, so that the welding ring 8 is reliably positioned and the relative position accuracy of the welding ring 8 and the ultra-thin metal ring 9 is ensured. During the welding process, protective gas is introduced into the protective gas chamber formed between the plug 2 and the chuck 4, so that the back of the weld is inflated and protected, which can ensure the penetration of single-sided welding and double-sided forming and the internal forming quality of the weld, and reduce weld porosity.

[0056] Embodiment 3: An ultra-thin metal ring welding auxiliary device (see attached Figure 6 , Attachment Figure 7 ), its structure is similar to that of Example 1 or Example 2, the main difference is that in this embodiment, a partition 30 and a piston column 31 are arranged in the air core 12, a plurality of radially movable positioning rods 32 are evenly installed on the outer wall of the air core 12, and a connecting rod 33 is hinged between the positioning rod 32 and the upper part of the piston column 31; a transition hole 34 is arranged in the air core 12, the upper end opening of the transition hole 34 is placed above the partition 30, and the lower end opening of the transition hole 34 is covered by the piston column 31, and the piston column 31 is pushed to move by the protective gas, and the positioning rod 32 is pushed to move radially by the connecting rod 33, and the positioning rod 32 is close to the inner wall of the ring hole 10 of the welding ring 8 and the ultra-thin metal ring 9, and the lower end opening of the transition hole 34 is exposed. Through this structural setting, the positioning rod 32 can realize the positioning and deviation correction of the welding ring 8 and the ring hole 10, and ensure the coaxiality of the welding ring 8 and the ring hole 10.

[0057] The partition 30 is placed above the piston column 31, and the piston column 31 is adapted to be installed at the lower part of the air core 12. The air outlet 13 is arranged at the upper part of the air core 12. A return spring 35 is installed between the partition 30 and the upper end of the piston column 31. An avoidance groove 36 is arranged on the side wall of the air core 12 corresponding to the connecting rod 33. The connecting rod 33 passes through the avoidance groove 36. The lower end of the connecting rod 33 is hinged on the hinge seat 37, and the hinge seat 37 is fastened to the upper end of the piston column 31. A sliding seat 38 is arranged on the outer wall of the air core 12 corresponding to the positioning rod 32. A sliding groove 39 is arranged on the sliding seat 38. A sliding column 40 is arranged on the positioning rod 32. The sliding column 40 is slidably installed in the sliding groove 39. The upper end of the connecting rod 33 is hinged to the sliding column 40. The upper and lower ends of the positioning rod 32 are provided with positioning heads 41 protruding outward, and the two positioning heads 41 are respectively in contact with the inner walls of the ring hole 10 of the welding ring 8 and the ultra-thin metal ring 9. The other structures are the same as those in either Embodiment 1 or Embodiment 2.

[0058] A method for welding an ultra-thin metal ring, the steps of which are similar to those of Example 1 or Example 2, the main difference being that in step S4 of this embodiment, protective gas is introduced into the protective gas chamber through the main gas guide pipe 1. In the initial stage, the piston column 31 is pushed, thereby pushing the positioning rod 32 to move radially through the connecting rod 33, and the positioning heads 41 at both ends of the positioning rod 32 are respectively in contact with the inner walls of the ring holes 10 of the welding ring 8 and the ultra-thin metal ring 9. At this time, the lower end opening of the transition hole 34 is no longer covered by the piston column 31, and the protective gas is transmitted to the top of the partition 30 through the transition hole 34, and is discharged into the protective gas chamber from the gas outlet 13 on the gas core 12. The other steps are the same as any one of Example 1 or Example 2.

[0059] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. An auxiliary device for welding ultra-thin metal rings, Its characteristics are: It includes a main air guide tube and a plug. A movably arranged chuck and a pre-tightening member are installed on the main air guide tube. The pre-tightening member is pressed against the chuck. The plug is tightly fitted with the ring hole on the ultra-thin metal ring. The main air guide tube is connected between the chuck and the plug. A welding ring is pressed between the chuck and the end of the ring hole.

2. An ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: A high silica cloth layer is arranged on the side wall of the plug.

3. The ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: A limit stopper is installed on the main air guide pipe, and the chuck is clamped between the limit stopper and the pre-tightening member.

4. The ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: An air core is arranged on the main air guide pipe, and the air core is placed between the plug and the chuck. The air core is in a tubular structure, and a plurality of air outlet holes are densely distributed on the side wall of the air core.

5. The ultra-thin metal ring welding auxiliary device according to claim 4, Its characteristics are: A connecting column is arranged on the main air guide pipe, and the connecting column and the plug are tightly connected.

6. The ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: The preload member is a preload spring, a spring seat is connected to the main air guide pipe, and the preload member abuts between the spring seat and the chuck.

7. The ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: A boss matched with the welding ring is arranged on the end surface of the chuck facing the plug.

8. The ultra-thin metal ring welding auxiliary device according to claim 1, Its characteristics are: The chuck is provided with a number of tiny exhaust holes.

9. An ultra-thin metal ring welding auxiliary device according to any one of claims 1 to 8, Its characteristics are: The main air guide tube is fastened to the slide plate, the slide plate is connected to the clamping seat, the clamping seat is provided with a clamping groove adapted to the ultra-thin metal ring, the clamping seat is provided with a guide column, the slide plate is slidably connected to the guide column, the guide column is connected to an abutting spring, and the abutting spring abuts against the slide plate.

10. A method for welding an ultra-thin metal ring, Its characteristics are: Auxiliary welding is performed using the ultra-thin metal ring welding auxiliary device as described in any one of claims 1 to 9, comprising the following steps: S1, clamping and positioning the ultra-thin metal ring; S2, fitting the welding ring and the plug together; S3, moving the main air duct so that the plug is tightly inserted into the ring hole on the ultra-thin metal ring, with one end of the welding ring pressed against the end of the ring hole, and the other end of the welding ring pressed against the chuck, at which time a protective gas chamber is formed between the plug and the chuck; S4, introducing protective gas into the protective gas chamber through the main air duct; S5, welding the weld between the welding ring and the end of the ring hole.

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