A pipe line adaptive clamping and welding device for rotatable tungsten needle

Abstract

The application discloses a pipeline self-adaptive clamping and welding device with a rotatable tungsten needle and relates to the technical field of pipeline self-adaptive clamping and welding. The device comprises a table body, a welding machine and a gas pressure regulating valve. A welding gun is arranged at the side end of the table body. A first electric push rod is installed at the side end of the table body. An extension table is installed at the extending end of the first electric push rod. A second electric push rod is installed at the top of the extension table. A pneumatic clamping jaw is installed at the extending end of the second electric push rod. The device can realize self-adaptive adjustment of different pipe diameters by manually twisting the handle to drive the upper and lower abutting blocks to displace and adjust. The clamping precision of the pipe can be ensured. The synchronous adjustment can be completed by twisting the handle. The operation steps are simplified. The device does not need to rely on experienced clamping personnel. The clamping deviation caused by the out-of-sync of the upper and lower clamps during step-by-step adjustment is avoided. The upper and lower abutting blocks displace synchronously, so that the central positioning of the pipeline can be maintained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline adaptive clamping and welding, in particular to a pipeline adaptive clamping and welding device with rotatable tungsten needle. BACKGROUND

[0002] The semiconductor ultra-high purity gas delivery system is a core part of the semiconductor manufacturing equipment, which is responsible for storing critical process gases and ensuring that these gases can be safely delivered to the process chamber. Once these media are contaminated, the chip yield will be greatly reduced. The industry requires that the cleanliness level of the inner wall of the pipeline should reach ISO14644-1 Class 5 or above, and the welding residual oxides, metal debris and the like must be strictly controlled. Early semiconductor pipeline welding relies on manual welding gun operation, and the distance between the tungsten electrode and the workpiece needs to be controlled within 0.6-1.2mm. It is difficult for manual operation to continuously maintain this precise distance, and the "tungsten clamping" defect caused by the contact between the tungsten electrode and the workpiece is prone to occur. At the same time, when manually controlling the pipe butt angle, it is easy to cause the edge deviation to be out of tolerance, and the flame welding may also cause uneven welding due to angle deviation, resulting in virtual welding, porosity and other problems. The pipeline adaptive clamping and welding device with rotatable tungsten needle combines the welding mechanism of the rotatable tungsten needle and the pipeline adaptive clamping mechanism, which can automatically adapt to different specifications of the pipeline and complete high-precision ring seam or longitudinal seam welding.

[0003] The existing device needs to manually adjust the clamping mechanism multiple times according to the specifications of the pipeline to achieve the effect of stable clamping of the pipeline. When manually adjusting the clamping mechanism, it is usually dependent on the experience and feel of the operator, which is not convenient to ensure the consistency of the positioning accuracy of each clamping. On the other hand, when welding different specifications of the pipeline, it is not convenient to adjust the position of the tungsten needle installation. When the tungsten needle is too close to the pipeline, it is easy to stick to the molten pool, which not only needs to be frequently stopped for cleaning the metal slag attached to the tungsten needle, but also may cause the tungsten needle to break in severe cases.

[0004] In view of the above problems, it is necessary to make innovative design on the basis of the original. SUMMARY

[0005] The purpose of the present application is to provide a pipeline adaptive clamping and welding device with rotatable tungsten needle to solve the problem of manual adjustment of the clamping mechanism in the background art, which is not convenient to ensure the consistency of the positioning accuracy of each clamping. The present application provides a solution significantly different from the prior art to solve the technical problem that the prior art solution is too single.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a pipe self-adaptive clamping and welding device of a rotatable tungsten needle, comprising a table body, a welding machine and a gas pressure regulating valve, a welding gun is arranged at the side end of the table body, a first electric push rod is installed at the side end of the table body, an extension table is installed at the extending end of the first electric push rod, a second electric push rod is installed at the top of the extension table, a pneumatic clamping jaw is installed at the extending end of the second electric push rod, a lower shell is installed at the top of the welding gun, an upper shell is rotatably connected to the top of the lower shell, an installation ring is installed inside the lower shell, a rotating ring is rotatably connected inside the installation ring, a pipe clamping is limitingly and slidably arranged inside the rotating ring, a size adjusting assembly is arranged on the outer surfaces of the lower shell and the upper shell, and a distance fine adjusting assembly is arranged inside the installation ring.

[0007] The size adjusting assembly comprises two groups of moving tables installed on the left and right sides of the lower shell and mounting brackets installed on the left and right sides of the upper shell, the moving tables are internally provided with two symmetrically sliding lower abutting blocks, the mounting brackets are internally provided with two symmetrically sliding upper abutting blocks, a connecting frame is installed on the surface of the lower shell, and a rotating table is rotatably connected inside the connecting frame.

[0008] Preferably, a power line is connected between the welding machine and the welding gun, a gear set is installed inside the lower shell and the upper shell, and a motor is installed outside the lower shell and the upper shell, and the output end of the motor is connected with the gear set.

[0009] Preferably, an annular groove is formed inside the installation ring, the rotating ring is limitingly and slidably arranged in the annular groove, the installation ring and the rotating ring are designed as three-quarter circular rings, and teeth are installed on the outer part of the rotating ring and engaged with the gear set.

[0010] Preferably, an oil tank is installed at the bottom side end of the moving table, a first piston rod is slidably arranged inside the oil tank, the extending end of the first piston rod is connected with the lower abutting block, a piston pipe is installed at the side end of the mounting bracket, a second piston rod is slidably arranged inside the piston pipe, the end of the second piston rod is connected with the upper abutting block, and a hose is connected between the oil tank and the piston pipe; the two groups of upper abutting blocks and the two groups of lower abutting blocks are mirror image arranged.

[0011] Preferably, a bidirectional screw rod is rotatably arranged inside the moving table, two groups of rotating tables are rotatably connected inside the connecting frame, and a belt is sleeved between the two groups of rotating tables; the rotating rods at the back ends of the two groups of rotating tables penetrate through the connecting frame and are connected with the bidirectional screw rods inside the moving tables on the left and right sides of the lower shell, and a handle is installed on the surface of the rotating table.

[0012] Preferably, a screw thread is formed inside the lower abutting block and connected with the screw thread on the surface of the bidirectional screw rod; the lower abutting block is composed of a bottom vertical rod and a top inclined rod.

[0013] Preferably, the distance fine adjustment assembly comprises a contact ring sliding in the annular groove in the mounting ring, the surface of the contact ring is connected with a pressing block through a support rod, the back end of the pressing block is provided with a spring, the other end of the spring is connected with the surface of the lower shell, the inside of the swivel ring is slidingly provided with a contact rod, the end of the contact rod inside the swivel ring is provided with a pressing ring, the surface of the contact rod is sleeved with a spring, one end of the spring is connected with the circular table, and the other end is connected with the inside of the swivel ring, and the pipe clamp is provided with a circular table at one end inside the swivel ring, the circular table is provided with a spring close to one end of the swivel ring, and the other end of the spring is connected with the swivel ring.

[0014] Preferably, the surface of the pressing block is provided with an inclined surface, the surface of the lower contact block is provided with a connecting rod, and the connecting rod is in contact with the inclined surface of the pressing block.

[0015] Preferably, the inside of the pressing ring is provided with an inclined surface, the circular table is in contact with the inclined surface of the inside of the pressing ring, the end of the contact rod away from the pressing ring is provided with a ball on the surface, and the ball is in contact with the contact ring.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The present application, through the upper contact block, the lower contact block and the size adjustment assembly, by manually twisting the handlebar, the upper contact block and the lower contact block are displaced together to adjust, the self-adaptive adjustment of different pipe diameters is realized, the problem that the operator needs to manually adjust the clamping mechanism multiple times is avoided, the clamping precision of the pipe can be ensured, synchronous adjustment can be completed by twisting the handlebar, the operation steps are simplified, it is not necessary to rely on experienced clamping personnel, and the clamping deviation caused by the asynchronous position of the upper clamp and the lower clamp during step-by-step adjustment is avoided, the upper contact block and the lower contact block are synchronously displaced, the central positioning of the pipeline can be maintained at all times, the coaxiality deviation can be controlled within 0.1 mm regardless of thin pipeline or thick pipeline, and the situation that one side is tightly clamped and the other side is loosely clamped does not occur.

[0018] 2、The present application, through the mounting ring, the swivel ring, the pipe clamp and the distance fine adjustment assembly, the position of the pipe clamp can be synchronously adjusted while the upper contact block and the lower contact block are displaced and adjusted, the position of the tungsten needle can be further adjusted according to the specifications of the pipe, the tungsten needle of the thin pipeline needs to be accurately aligned with the center of the pipeline, and the tungsten needle of the thick pipeline needs to be aligned with the root of the groove, the linkage design can adjust the position of the pipe clamp (tungsten needle installation carrier) while adjusting the upper contact block and the lower contact block to clamp the pipeline, so that the tungsten needle is always in the optimal welding position corresponding to the pipe diameter, the problems that the tungsten needle is too close to burn through the thin-walled pipeline or too far to cause the thick-walled pipeline not to be welded through are avoided, the tungsten needle is always aligned with the center of the weld, and the weld edge biting and edge missing caused by arc deviation are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The schematic diagram of the main structure of one perspective of the present application;

[0020] Figure 2 The schematic diagram of the main structure of another perspective of the present application;

[0021] Figure 3 The schematic diagram of the structure of the welding gun of the present application;

[0022] Figure 4 The schematic diagram of the structure of the lower shell and the upper shell of the present application;

[0023] Figure 5 The schematic diagram of the cross-sectional structure of the lower shell and the upper shell of the present application;

[0024] Figure 6 The schematic diagram of the exploded structure of the size adjusting assembly of the present application;

[0025] Figure 7 The schematic diagram of the partial structure of the lower shell of the present application;

[0026] Figure 8 The schematic diagram of the exploded structure of the mounting ring, the rotating ring and the pipe clamp of the present application;

[0027] Figure 9 The schematic diagram of the internal exploded structure of the rotating ring of the present application;

[0028] Figure 10 The schematic diagram of the enlarged structure of A in the present application Figure 9

[0029] Figure 11 The schematic diagram of the cross-sectional structure of the oil tank and the piston pipe of the present application.

[0030] In the figure: 1, table body; 2, welding machine; 3, air pressure adjusting valve; 4, welding gun; 5, first electric push rod; 6, extension table; 7, second electric push rod; 8, pneumatic clamping jaw; 9, lower shell; 10, upper shell; 11, upper abutting block; 12, lower abutting block; 13, gear set; 14, mounting ring; 15, rotating ring; 16, pipe clamp; 171, moving table; 172, mounting frame; 173, connecting frame; 174, rotating table; 175, oil tank; 176, first piston rod; 177, piston pipe; 178, second piston rod; 181, abutting ring; 182, extrusion block; 183, connecting rod; 184, abutting rod; 185, extrusion ring; 186, circular table. DETAILED DESCRIPTION

[0031] ​Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present application.

[0032] Please refer to Figures 1-11 The present application provides a technical solution: a pipe self-adaptive clamping and welding device of a rotatable tungsten needle, comprising a table body 1, a welding machine 2 and a gas pressure regulating valve 3, the table body 1 is provided with a welding gun 4 at the side end, the welding machine 2 and the welding gun 4 are connected by a power line, a lower shell 9 and an upper shell 10 are internally provided with a gear set 13, the lower shell 9 and the upper shell 10 are externally provided with a motor, the output end of the motor is connected with the gear set 13, the table body 1 is provided with a first electric push rod 5 at the side end, the first electric push rod 5 is provided with an extension table 6 at the extending end, the extension table 6 is provided with a second electric push rod 7 at the top, the second electric push rod 7 is provided with a pneumatic clamping jaw 8 at the extending end, the welding gun 4 is provided with the lower shell 9 at the top, the lower shell 9 is rotatably connected with the upper shell 10 at the top, the lower shell 9 is internally provided with a mounting ring 14, the mounting ring 14 is internally provided with an annular groove, and a rotating ring 15 is limitingly and slidably arranged in the annular groove; the mounting ring 14 and the rotating ring 15 are both designed as three-fourths of a circular ring; the rotating ring 15 is externally provided with a gear tooth, and the gear tooth is engaged with the gear set 13; the mounting ring 14 is rotatably connected with the rotating ring 15 internally, and the rotating ring 15 is limitingly and slidably provided with a pipe clamping 16 internally; the lower shell 9 and the upper shell 10 are provided with a size adjusting assembly on the outer surface, and the mounting ring 14 is internally provided with a distance fine adjusting assembly.

[0033] The upper shell 10 is rotated and opened from the top of the lower shell 9, then the tungsten needle is inserted into the pipe clamping 16, and then the pipe to be welded is placed in the lower shell 9, and the tungsten needle is aligned with the groove of the pipe; the extending ends of the first electric push rod 5 and the second electric push rod 7 are synchronously moved by the controller, until the inside of the pneumatic clamping jaw 8 is flush with the pipe, and then the non-welding part of the pipe is clamped by the pneumatic clamping jaw 8; at this time, the protective gas is injected into the pipe by the gas pressure regulating valve 3, and the welding protection gas / purging gas should be pure argon or a mixture of argon and hydrogen gas with a volume percentage of not more than 5%; the mixed gas must be mixed in advance, and the purity and concentration thereof are certified by a special gas supply company; then the welding gun 4 is driven by the welding machine 2 to perform welding, and at the same time, the gear set 13 is driven by the motor to operate, and when the gear set 13 operates, the rotating ring 15 is driven to rotate in the mounting ring 14 by the gear tooth on the outer side of the rotating ring 15, so as to realize the annular welding of the pipe.

[0034] As an embodiment of the present application, the size adjusting assembly comprises two groups of moving tables 171 mounted on the left and right sides of the lower shell 9, and mounting frames 172 mounted on the left and right sides of the upper shell 10, the moving tables 171 are internally provided with two symmetrically sliding lower abutting blocks 12, the mounting frames 172 are internally provided with two symmetrically sliding upper abutting blocks 11, the surface of the lower shell 9 is provided with a connecting frame 173, the connecting frame 173 is internally rotatably connected with a rotating table 174, the moving tables 171 are rotatably connected with bidirectional screw rods, the connecting frame 173 is internally rotatably connected with two groups of rotating tables 174, and the two groups of rotating tables 174 are sleeved with a belt; the back end rotating rods of the two groups of rotating tables 174 penetrate through the connecting frame 173 and are connected with the bidirectional screw rods in the moving tables 171 on the left and right sides of the lower shell 9, the surface of the rotating table 174 is provided with a handle, the bottom side end of the moving table 171 is provided with an oil tank 175, the oil tank 175 is internally slidably connected with a first piston rod 176, the extending end of the first piston rod 176 is connected with the lower abutting block 12, the side end of the mounting frame 172 is provided with a piston pipe 177, the piston pipe 177 is internally slidably connected with a second piston rod 178, the end of the second piston rod 178 is connected with the upper abutting block 11, and a hose is connected between the oil tank 175 and the piston pipe 177; the two groups of upper abutting blocks 11 and the two groups of lower abutting blocks 12 are mirror image arranged, the lower abutting block 12 is internally provided with a thread, and the thread is connected with the surface thread of the bidirectional screw rod; the lower abutting block 12 is composed of a bottom vertical rod and a top inclined rod;

[0035] The upper shell 10 is rotated and opened from the top of the lower shell 9, at this time the pipe to be welded is placed on the top of the lower shell 9, then the upper shell 10 is rotated and closed, then the worker manually twists the handle, the handle drives the rotating table 174 to rotate in the connecting frame 173, and drives the other rotating table 174 to rotate through the belt, so that the two rotating tables 174 drive the bidirectional screw rods in the moving tables 171 to rotate through the rotating rods, so that the lower abutting blocks 12 gradually move inward, while the lower abutting blocks 12 move, the first piston rod 176 is pulled to inject the oil in the oil tank 175 into the piston pipe 177, at this time the increased oil in the piston pipe 177 pushes the second piston rod 178 to move outward, and drives the upper abutting block 11 to adjust together with the lower abutting block 12, then the inclined surfaces of the two groups of lower abutting blocks 12 and the upper abutting blocks 11 respectively abut the tangent points of the pipe, realizing self-adaptive adjustment of different pipe diameters, avoiding the problem that the operator needs to manually adjust the clamping mechanism many times, and also ensuring the clamping precision of the pipe, synchronous adjustment can be completed by twisting the handle, the operation steps are simplified, it is not necessary to rely on experienced clamping personnel, and clamping deviation caused by different positions of the upper and lower clamps during step-by-step adjustment is avoided, the upper abutting block 11 and the lower abutting block 12 are synchronously displaced, and the central positioning of the pipe can be always maintained.

[0036] As an embodiment of the present application, the distance fine-tuning assembly comprises a contact ring 181 sliding in the annular groove inside the mounting ring 14, the surface of the contact ring 181 is connected with a pressing block 182 through a support rod; the surface of the pressing block 182 is provided with an inclined surface, the surface of the lower contact block 12 is provided with a connecting rod 183, the connecting rod 183 is in contact with the inclined surface of the pressing block 182, the back end of the pressing block 182 is provided with a spring, and the other end of the spring is connected with the surface of the lower shell 9; the contact rod 184 is sliding in the inside of the rotating ring 15, the end of the contact rod 184 inside the rotating ring 15 is provided with a pressing ring 185, the surface of the contact rod 184 is provided with a spring, one end of the spring is connected with the circular table 186, and the other end is connected with the inside of the rotating ring 15; the end of the pipe clamp 16 inside the rotating ring 15 is provided with the circular table 186, the end of the circular table 186 close to the rotating ring 15 is provided with a spring, the other end of the spring is connected with the rotating ring 15, the inner side of the pressing ring 185 is provided with an inclined surface, and the circular table 186 is in contact with the inner inclined surface of the pressing ring 185; the surface of the end of the contact rod 184 away from the pressing ring 185 is provided with a ball, and the ball is in contact with the contact ring 181;

[0037] The surface connecting rod 183 applies pressure to the inclined surface of the pressing block 182, at this time, the pressing block 182 is gradually extruded and slides to the inside of the mounting ring 14, and the pressing block 182 slides to drive the contact ring 181 to move, and the contact rod 184 is pressed, the ball at the end of the contact rod 184 away from the pressing ring 185 can reduce the wear of the end of the contact rod 184 when the rotating ring 15 rotates, and the installation of the contact rod 184 can continuously apply pressure to the contact ring 181 to drive the pressing ring 185 to gradually move to the inside of the rotating ring 15 when the rotating ring 15 rotates, and the inclined surface of the pressing ring 185 continuously applies pressure to the circular table 186, so that the pipe clamp 16 gradually slides outward, and the position of the tungsten needle gradually fine-tunes the position of the pipe, the tungsten needle of the fine pipe needs to be accurately aligned with the center of the pipe, and the tungsten needle of the thick pipe needs to be aligned with the root of the groove, and this linkage design can adjust the position of the "tungsten needle installation carrier" of the pipe clamp 16 while clamping the pipe by the upper contact block 11 and the lower contact block 12, so that the tungsten needle is always in the optimal welding position corresponding to the pipe diameter.

[0038] Pre-weld preparation: The welding equipment shall have constant current DCEN and electronic control capabilities to perform 5 Hz or higher pulse welding with fast response capabilities. All welding fixtures and fittings shall be clean and free of any particulate and excessive discoloration. The fittings shall rotate freely and smoothly at all speeds. All fixtures shall be capable of securing the applicable fitting or tubing and the tubing and fitting shall not move more than 0.075 mm after clamping to ensure proper assembly. The electrode shall be precisely ground according to the factory's specifications for the type of fitting and welding process. The electrode gap shall be set using a tool or procedure that provides an accurate and repeatable gap and shall be set to within 0.005 cm (0.002 in). A 2% cerium doped or 2% lanthanum doped tungsten electrode shall be used. Stainless steel tubing and fittings with face seals shall be used whenever possible for purge gas. Acceptable PFA plastic tubing can be used as final tubing for flexibility. The length shall be limited to 3 meters. All components that come in contact with the weldment shall be stainless steel. Only thick wall PFA or stainless steel tubing can be used for ID purging. High pressure systems can only use stainless steel tubing and the purge gas supply line shall be equipped with a flow indicator to ensure proper purging.

[0039] Tubing preparation: The operation shall be performed in a specified clean room or controlled environment; the tubing cutting size and tolerance calculation shall take into account the welding shrinkage, and the welding shrinkage of tubing of different diameters, wall thicknesses, materials, and processes shall be calculated to the tubing cutting length through sufficient testing and formation of SOP to ensure that the final product meets the line function dimensions and tolerances in the drawing; if there is particulate contamination, it can be reduced through nitrogen blowing or cleaning that meets the requirements; the welding end face of all components or tubing shall be cut using sharp tools; UHP and HP tubing is not allowed to use any lubricant; after cutting the welding end face of all components and tubing, burrs shall be removed; the surface to be welded shall be clean and not allowed to have oxidation, discoloration, oil stains, scale, debris, or any other material that is not conducive to welding; the pipe to be welded shall be flat and all necking / wedging caused by cutting shall be removed; for pipe cutting, a lathe-type tool with a wheel cutter or a specially designed cutter with an alignment guide shall be used; UHP and HP tubing is not allowed to use lubricant. If any cracks are found, re-flattening (maintaining all dimensional tolerances) or discarding the pipe; after cutting the pipe, the burrs in the inner diameter shall be carefully removed. UHP and HP tubing shall not scratch the inner diameter surface, and if scratched, it shall be re-prepared (if all dimensional tolerances can be maintained) or scrapped; the maximum chamfer of the inner diameter and the outer diameter shall be less than 10% of the wall thickness or 0.13 mm, whichever is smaller; all cutters, flat cutters, chucks, or brushes used on stainless steel pipes shall not be used on carbon steel pipes. All tools shall be kept clean and free of grease, oil, dirt, and other impurities to avoid cross-contamination of different materials.

[0040] Working principle: when welding, first open the upper shell 10 from the top of the lower shell 9, then insert the tungsten needle into the clamp pipe 16, then place the pipe to be welded in the lower shell 9, and make the tungsten needle align with the pipe groove, drive the first electric push rod 5 and the second electric push rod 7 to move synchronously through the controller, until the inside of the pneumatic clamp jaw 8 is flush with the pipe, then clamp the pipe at the non-welding position through the pneumatic clamp jaw 8, at this time, inject protective gas into the pipe through the gas pressure regulating valve 3, then drive the welding gun 4 through the welding machine 2 to weld, at the same time of welding, the motor driven gear set 13 operates, when the gear set 13 operates, the rotating ring 15 is driven to rotate in the installation ring 14 through the external teeth, realizing the annular welding of the pipe.

[0041] When welding small size pipes, open the upper shell 10 from the top of the lower shell 9, then place the pipe to be welded on the top of the lower shell 9, then close the upper shell 10, then manually twist the handle, which drives the rotating table 174 to rotate in the connecting frame 173, and drives the other rotating table 174 to rotate through the belt, so that the two rotating tables 174 drive the bidirectional screw in the moving table 171 to rotate through the rotating rod, so that the lower abutting block 12 moves inward step by step, while the lower abutting block 12 pulls the first piston rod 176 to inject oil in the piston pipe 177, at this time, the oil in the piston pipe 177 pushes the second piston rod 178 to move outward, and drives the upper abutting block 11 to adjust with the lower abutting block 12, then the inclined surface of the two groups of lower abutting blocks 12 and upper abutting blocks 11 respectively abuts with the tangent point of the pipe, realizing clamping and limiting of pipes of different specifications.

[0042] When the lower abutting block 12 moves step by step, the surface connecting rod 183 applies pressure to the inclined surface of the extrusion block 182, at this time, the extrusion block 182 is gradually extruded and slides into the installation ring 14, while the extrusion block 182 slides and moves the abutting ring 181, and applies pressure to the abutting rod 184, the ball at the end of the abutting rod 184 away from the extrusion ring 185 can reduce the wear of the end of the abutting rod 184 when the rotating ring 15 rotates, and the installation of a number of abutting rods 184 can make the abutting ring 181 continuously apply pressure to the abutting rod 184 when the rotating ring 15 rotates, so as to drive the extrusion ring 185 to gradually move into the rotating ring 15, and the inclined surface of the extrusion ring 185 continuously applies pressure to the circular table 186, so as to gradually slide the clamp pipe 16 outward, and gradually adjust the position of the tungsten needle to the position of the pipe.

[0043] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotatable tungsten needle tube adaptive clamping welding device, comprising a table (1), a welding machine (2), and a gas pressure regulating valve (3), characterized in that: A welding torch (4) is provided on the side of the table body (1). A first electric push rod (5) is installed on the side of the table body (1). An extension platform (6) is installed on the extended end of the first electric push rod (5). A second electric push rod (7) is installed on the top of the extension platform (6). A pneumatic gripper (8) is installed on the extended end of the second electric push rod (7). A lower housing (9) is installed on the top of the welding torch (4). An upper housing (10) is rotatably connected to the top of the lower housing (9). An installation ring (14) is installed inside the lower housing (9). A rotating ring (15) is rotatably connected inside the installation ring (14). A clamping tube (16) is limited and slidably connected inside the rotating ring (15). Size adjustment components are provided on the outer surfaces of the lower housing (9) and the upper housing (10). A distance fine-tuning component is provided inside the installation ring (14). The size adjustment assembly includes two sets of movable platforms (171) installed on the left and right sides of the lower housing (9) and mounting brackets (172) installed on the left and right sides of the upper housing (10). The movable platforms (171) are provided with two symmetrically sliding lower abutment blocks (12), and the mounting brackets (172) are provided with two symmetrically sliding upper abutment blocks (11). A connecting frame (173) is installed on the surface of the lower housing (9), and a turntable (174) is rotatably connected inside the connecting frame (173). The distance fine-tuning component includes a contact ring (181) that slides laterally within an annular groove inside the mounting ring (14). A pressing block (182) is connected to the surface of the contact ring (181) via a support rod. A spring is installed on the back end of the pressing block (182), and the other end of the spring is connected to the surface of the lower housing (9). A contact rod (184) slides laterally within the rotating ring (15). A pressing ring (185) is installed at one end of the contact rod (184) inside the rotating ring (15). A spring is sleeved on the surface of the contact rod (184). One end of the spring is connected to a frustum (186), and the other end is connected to the inside of the rotating ring (15). A frustum (186) is installed at one end of the clamp tube (16) inside the rotating ring (15). A spring is installed at one end of the frustum (186) near the rotating ring (15), and the other end of the spring is connected to the rotating ring (15).

2. The rotatable tungsten needle self-adaptive clamping and welding device according to claim 1, characterized in that: A power cord is connected between the welding machine (2) and the welding torch (4). A gear set (13) is installed inside the lower housing (9) and the upper housing (10). A motor is installed outside the lower housing (9) and the upper housing (10), and the output end of the motor is connected to the gear set (13).

3. The self-adaptive clamping and welding device for rotatable tungsten needles according to claim 2, characterized in that: The mounting ring (14) has an annular groove inside, and the rotating ring (15) slides within the annular groove. Both the mounting ring (14) and the rotating ring (15) are three-quarters of an annular design. The rotating ring (15) has teeth installed on its outside, and the teeth mesh with the gear set (13).

4. The rotatable tungsten needle adaptive clamping and welding device for pipelines according to claim 3, characterized in that: An oil tank (175) is installed on the bottom side of the mobile platform (171). A first piston rod (176) slides inside the oil tank (175). The extended end of the first piston rod (176) is connected to the lower contact block (12). A piston tube (177) is installed on the side of the mounting bracket (172). A second piston rod (178) slides inside the piston tube (177). The end of the second piston rod (178) is connected to the upper contact block (11). A hose is connected between the oil tank (175) and the piston tube (177). The two sets of upper contact blocks (11) and the two sets of lower contact blocks (12) are arranged in a mirror image.

5. The self-adaptive clamping and welding device for rotatable tungsten needles according to claim 4, characterized in that: The movable platform (171) has a bidirectional lead screw rotating inside, and the connecting frame (173) has two sets of turntables (174) rotating inside, with a belt sleeved between the two sets of turntables (174); the rotating rods at the back ends of the two sets of turntables (174) pass through the connecting frame (173) and are connected to the bidirectional lead screws inside the movable platform (171) on the left and right sides of the lower housing (9), and a handle is installed on the surface of the turntable (174).

6. The self-adaptive clamping and welding device for rotatable tungsten needles according to claim 5, characterized in that: The lower contact block (12) has a thread inside and is threaded to the surface of the bidirectional lead screw; the lower contact block (12) is composed of a bottom section of vertical rod and a top section of inclined rod.

7. The self-adaptive clamping and welding device for rotatable tungsten needles according to claim 6, characterized in that: The surface of the extrusion block (182) is provided with an inclined surface, and the surface of the lower contact block (12) is provided with a connecting rod (183), which abuts against the inclined surface of the extrusion block (182).

8. The self-adaptive clamping and welding device for rotatable tungsten needles according to claim 7, characterized in that: The inner side of the extrusion ring (185) is provided with an inclined surface, and the truncated cone (186) abuts against the inclined surface of the inner side of the extrusion ring (185); a ball is installed on the surface of the end of the abutting rod (184) away from the extrusion ring (185), and the ball abuts against the abutting ring (181).

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