A welding device for processing a sample holder support ring

Abstract

The application discloses a kind of welding devices of sample rack support circle processing, it is related to annular profile positioning and resistance butt welding technical field, the welding device of sample rack support circle processing, including rack, positioning base, radial positioning sliding seat, arc-shaped supporting block, interface guide block, pressing cylinder and pressing block, multiple radial positioning sliding seat drives arc-shaped supporting block to carry out radial support and centering to sample rack support circle, interface end is limited by interface guide slot, and the welding avoidance space is formed on the both sides of interface by guide slope, and the guide slope on the two pressing blocks is oppositely arranged and respectively as butt welding electrode, so that the both sides of interface complete guide, arc transition and stable pressing during pressing process, reduce the influence of interface height difference, radial misplacement and local warping on butt welding quality.

Description

Technical Field

[0001] This invention relates to the field of annular profile positioning and resistance welding technology, specifically a welding device for processing sample holder support rings. Background Technology

[0002] Sample holder support rings are usually made by rolling strip profiles into annular blanks, and then joining and welding the two end faces of the annular blanks to obtain a continuous closed annular support structure. Resistance welding utilizes the current flowing through the contact area of ​​the two end faces to generate resistance heat, and forms a welded joint under pressure on the end faces. Therefore, the end position before welding and the clamping state during welding will directly affect the joint formation.

[0003] Even after the profile is rolled into a circle, it still has springback and local deformation. The two sides of the interface are prone to height difference, radial misalignment, end face gap and roundness deviation. When the existing fixture clamps the ring blank, the contact area between the flat pressure block or the pressure block with edge and the workpiece is small. Rolling, lateral displacement and local warping are prone to occur near the interface. Manual point-by-point adjustment is difficult to take into account both the interface position and the overall roundness at the same time.

[0004] In addition, when ordinary positioning blocks are placed close to the interface, they will occupy the welding area, affecting electrode clamping, welding observation and joint heat release. When there is a stroke difference between the two independent clamping actuators, the pressure state on both sides of the interface will be inconsistent. Therefore, a sample holder support ring processing and welding device is needed that takes into account the centering of the annular blank, interface limiting, welding avoidance, guiding clamping and observation of the downward pressure state. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for processing sample holder support rings, so as to solve the problems that there are height differences, radial misalignment and local warping on both sides of the interface after the sample holder support ring is rolled into a circle, and that existing clamping structures cannot simultaneously achieve overall centering, interface limiting and welding space avoidance.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a welding device for processing sample rack support rings, comprising a frame, a positioning base, two clamping cylinders, and two clamping blocks. The positioning base is mounted on the frame, and the two clamping cylinders are mounted above the positioning base and respectively connected to the two clamping blocks. Multiple radial positioning slides are spaced circumferentially on the positioning base, and each radial positioning slide has an arc-shaped support block. The arc-shaped support block has an arc-shaped support groove for supporting the sample rack support ring. The positioning base is provided with sections arranged at the interface of the sample rack support ring. Two interface guide blocks on both sides, each with an interface guide groove and an inlet ramp extending to the groove opening. Two clamping blocks are arranged above the interface on both sides and electrically connected to the two output ends of the welding machine. Both clamping blocks are welding electrodes. Each clamping block has an arc-shaped clamping groove on the side facing the sample holder support ring. The arc-shaped clamping groove includes a guide ramp, a circular arc transition surface, and a circular arc clamping section. The guide ramp is located at the end of the arc-shaped clamping groove facing the interface. The circular arc transition surface connects the guide ramp and the circular arc clamping section. The guide ramps on the two clamping blocks are set facing each other.

[0007] Furthermore, a turntable is rotatably mounted on the positioning base, and a transmission gear ring is fixedly mounted on the outer circumference of the turntable. A motor is mounted on the positioning base, and a drive shaft is connected to the output end of the motor. The drive shaft is fixedly connected to the main bevel gear, and the main bevel gear meshes with the transmission gear ring.

[0008] Furthermore, a progressive threaded bar extending from the axis of the turntable is provided on the side of the turntable facing the radial positioning slide. A progressive threaded groove is provided on the side of the radial positioning slide facing the turntable. The progressive threaded bar meshes with the progressive threaded grooves on multiple radial positioning slides. The moving directions of multiple radial positioning slides all pass through the axis of the turntable.

[0009] Furthermore, the positioning base is equipped with two cylinder clamps arranged on both sides of the interface. The output ends of the two cylinder clamps are respectively connected to arc-shaped clamping blocks. The moving direction of the two arc-shaped clamping blocks is pointing towards the center of the sample holder support ring. A guide post is provided between the arc-shaped clamping block and the positioning base. The cylinder clamp is equipped with an air pipe interface that communicates with the working chamber of the cylinder clamp.

[0010] Furthermore, the output end of one of the clamping cylinders is movably connected to the transverse guide rod, and the output end of the other clamping cylinder is movably connected to the connecting slider. The connecting slider is sleeved on the transverse guide rod and slidably connected to the transverse guide rod. A level is fixedly installed on the transverse guide rod, and two clamping blocks are respectively installed at the lower part of the transverse guide rod and the connecting slider.

[0011] Furthermore, the groove surface of the arc-shaped clamping section is a cylindrical surface that extends tangentially along the interface of the sample holder support ring. The guide slope is inclined upward along the direction close to the interface. The arc transition surface is tangent to the guide slope and the arc-shaped clamping section respectively. The two guide slopes are set opposite to each other about the center of the interface. The two arc-shaped clamping sections are located on both sides of the interface. The interface is located between the two clamping blocks.

[0012] Furthermore, each interface guide groove is set along the extension direction of the sample holder support ring end, the two side walls of the interface guide groove are arranged on both sides of the sample holder support ring end, the bottom of the interface guide groove is located below the sample holder support ring end, the guide slope is set at the end of the interface guide block facing the sample holder support ring interface, the distance between the two guide slopes increases along the direction closer to the interface, and the two interface guide blocks form welding avoidance space on both sides of the interface.

[0013] Furthermore, the length direction of the level is parallel to the length direction of the transverse guide rod. When the lower ends of the two clamping blocks are at the same height, the axis of the transverse guide rod is parallel to the upper surface of the positioning base. Multiple arc-shaped support blocks are distributed at intervals along the circumference of the turntable, and multiple arc-shaped support grooves face the axis of the turntable. The multiple arc-shaped support grooves together form the annular support area of ​​the sample rack support ring.

[0014] The present invention has the following beneficial effects: (1) The welding device for processing the sample frame support ring sets interface guide blocks on both sides of the interface, and forms interface guide grooves and guide slopes on the interface guide blocks. This allows the two ends of the sample frame support ring to be first limited laterally and lowerly by the groove wall and bottom of the interface guide groove. Then, the guide slopes that gradually expand towards the interface form a welding clearance space near the joint. Combined with the guide slopes, arc transition surfaces and arc pressing sections on the two pressing blocks, the pressing process sequentially forms a guiding effect towards the interface, a continuous transition and arc pressing, thereby reducing radial misalignment, local warping and point pressure on both sides of the interface, and improving the mating state of the two end faces.

[0015] (2) The welding device for processing the sample rack support ring forms a radial linkage path through a motor, drive shaft, main bevel gear, transmission gear ring, turntable, progressive threaded strip and progressive threaded groove. When the turntable rotates, multiple radial positioning slides drive the arc-shaped support block to move in linkage towards the turntable axis. The arc-shaped support groove supports the sample rack support ring from multiple circumferential positions. At the same time, the cylinder clamp drives the arc-shaped clamping block to move towards the center of the sample rack support ring, thereby establishing a unified center reference before interface positioning and reducing the influence of roundness changes caused by local clamping on the interface position.

[0016] (3) The welding device for processing the sample rack support ring drives the transverse guide rod and the connecting slider through two clamping cylinders respectively, and makes the connecting slider and the transverse guide rod form a sliding fit. The level on the transverse guide rod changes its posture according to the height difference between the two clamping blocks, so that the operator can judge the pressure difference between the two clamping cylinders and adjust the clamping state according to the level display. At the same time, the movable connection retains the relative motion margin for the two independent output ends, reducing rigid interference and unilateral overpressure caused by the stroke difference.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the positioning base and clamping mechanism of the present invention.

[0020] Figure 3 This is a schematic diagram of the clamping cylinder, transverse guide rod, and connecting slider structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the clamping block and arc-shaped pressure groove structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the radial positioning slide and arc-shaped support block arrangement of the present invention.

[0023] Figure 6 This is a schematic diagram of the turntable drive structure of the present invention.

[0024] Figure 7 This is a schematic diagram of the combined structure of the radial positioning slide, arc-shaped support block, and cylinder clamp of the present invention.

[0025] Figure 8 This is a schematic diagram of the cylinder clamp, arc-shaped clamping block, and guide post structure of the present invention.

[0026] Figure 9 This is a schematic diagram of the interface guide block structure of the present invention.

[0027] Figure 10 This is a schematic diagram of the overall structure of the arc-shaped pressure groove of the present invention.

[0028] In the diagram: 1. Frame; 2. Positioning base; 3. Sample rack support ring; 4. Clamping cylinder; 5. Clamping block; 6. Horizontal guide rod; 601. Level; 7. Connecting slider; 8. Arc-shaped pressure groove; 801. Guide slope; 802. Arc transition surface; 803. Arc clamping section; 9. Radial positioning slide; 10. Arc-shaped support block; 1001. Arc-shaped support groove; 11. Motor; 12. Drive shaft; 13. Main bevel gear; 14. Transmission gear ring; 15. Turntable; 16. Progressive threaded strip; 17. Progressive threaded groove; 18. Air pipe interface; 19. Cylinder clamp; 20. Arc-shaped clamping block; 21. Guide post; 22. Interface guide block; 2201. Interface guide groove; 2202. Guide slope. Detailed Implementation

[0029] 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.

[0030] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0031] Please see Figures 1-10 The present invention provides a technical solution: a welding device for processing sample rack support rings, including a frame 1, a positioning base 2, two clamping cylinders 4 and two clamping blocks 5. The positioning base 2 is disposed on the frame 1, the two clamping cylinders 4 are disposed above the positioning base 2 and are respectively connected to the two clamping blocks 5. Multiple radial positioning slides 9 are arranged at intervals along the circumference on the positioning base 2, and each radial positioning slide 9 is provided with an arc-shaped support block 10. An arc-shaped support groove 1001 for supporting the sample rack support ring 3 is opened on the arc-shaped support block 10. The positioning base 2 is provided with two interface guide blocks 22 arranged on both sides of the interface of the sample rack support ring 3. Each interface guide block 22 has an interface guide groove 2201 and an inlet slope 2202 extending to the opening of the interface guide groove 2201. Two clamping blocks 5 are positioned above the interface on both sides and electrically connected to the two output ends of the welding machine. Both clamping blocks 5 are welding electrodes. Each clamping block 5 has an arc-shaped pressure groove 8 on the side facing the sample holder support ring 3. The arc-shaped pressure groove 8 includes a guiding slope 801, an arc transition surface 802, and an arc pressing section 803. The guiding slope 801 is located at the end of the arc-shaped pressure groove 8 facing the interface. The arc transition surface 802 connects the guiding slope 801 and the arc pressing section 803. The guiding slopes 801 on the two clamping blocks 5 are arranged facing each other. The guiding slopes 801, arc transition surfaces 802, and arc pressing sections 803 on the two clamping blocks 5 sequentially complete the end guiding, continuous transition, and arc surface pressing, thereby reducing the interface height difference, radial misalignment, local warping, and concentrated pressure, and ensuring that the clamping blocks 5, as welding electrodes, maintain stable pressing and conductive contact.

[0032] A turntable 15 is rotatably mounted on the positioning base 2. A transmission gear ring 14 is fixedly mounted on the outer periphery of the turntable 15. A motor 11 is mounted on the positioning base 2. The output end of the motor 11 is connected to a drive shaft 12. The drive shaft 12 is fixedly connected to a main bevel gear 13. The main bevel gear 13 meshes with the transmission gear ring 14, so that the turntable 15 rotates stably around the center of the positioning base 2. This provides a unified power source for the linkage adjustment of multiple radial positioning slides 9 and reduces the center deviation caused by adjusting each positioning position separately.

[0033] A progressive threaded bar 16 extending from the axis of the turntable 15 is provided on the side of the turntable 15 facing the radial positioning slide 9. A progressive threaded groove 17 is provided on the side of the radial positioning slide 9 facing the turntable 15. The progressive threaded bar 16 meshes with the progressive threaded groove 17 on the multiple radial positioning slides 9. The moving direction of the multiple radial positioning slides 9 all passes through the axis of the turntable 15. The progressive threaded bar 16 meshes with the progressive threaded groove 17 on the multiple radial positioning slides 9 at the same time, so that the rotational motion of the turntable 15 is converted into the linkage motion of the multiple radial positioning slides 9 toward or away from the axis of the turntable 15. The multiple arc-shaped support blocks 10 synchronously change the support radius from different circumferential positions, so that the center of the sample holder support ring 3 is consistent with the axis of the turntable 15, and takes into account the placement of the workpiece and the release of the positioning after welding.

[0034] The positioning base 2 is equipped with two cylinder clamps 19 arranged on both sides of the interface. The output ends of the two cylinder clamps 19 are respectively connected to arc-shaped clamping blocks 20. The moving direction of the two arc-shaped clamping blocks 20 is towards the center of the sample frame support ring 3. A guide post 21 is provided between the arc-shaped clamping blocks 20 and the positioning base 2. The cylinder clamps 19 are equipped with air pipe interfaces 18 that communicate with the working chamber of the cylinder clamps 19. The two cylinder clamps 19 drive the arc-shaped clamping blocks 20 to move towards the center of the sample frame support ring 3, and the moving direction of the arc-shaped clamping blocks 20 is limited by the guide post 21, so that the arc-shaped clamping blocks 20 clamp the sample frame support ring 3 radially, further limiting the radial displacement of the workpiece during the clamping and energizing process. The air pipe interface 18 is connected to the working chamber of the cylinder clamps 19, so that the two radial clamping positions have independent pneumatic input conditions.

[0035] One of the pressing cylinders 4 has its output end movably connected to the transverse guide rod 6, and the other pressing cylinder 4 has its output end movably connected to the connecting slider 7. The connecting slider 7 is sleeved on the transverse guide rod 6 and slidably connected to the transverse guide rod 6. A level 601 is fixedly installed on the transverse guide rod 6. Two pressing blocks 5 are respectively installed at the lower part of the transverse guide rod 6 and the connecting slider 7. One pressing cylinder 4 drives the transverse guide rod 6 to move, and the other pressing cylinder 4 drives the connecting slider 7 to move, and makes the connecting slider 7 slide along the transverse guide rod 6. This keeps the two pressing cylinders 4 on their respective downward pressing paths and reserves relative movement margin for the output stroke difference. The level 601 on the transverse guide rod 6 changes its display according to the height difference between the two pressing blocks 5, which makes it easy for the operator to find that the pressure on both sides of the interface is inconsistent and adjust the pressing state.

[0036] The groove surface of the arc-shaped clamping section 803 is a cylindrical surface that extends tangentially along the interface of the sample holder support ring 3. The guide slope 801 is inclined upward along the direction close to the interface. The arc-shaped transition surface 802 is tangent to the guide slope 801 and the arc-shaped clamping section 803 respectively. By making the guide slope 801 inclined upward along the direction close to the interface, the clamping block 5 forms a tangential force towards the interface in the vertical clamping force when it moves downward. The arc-shaped transition surface 802 is tangent to the guide slope 801 and the arc-shaped clamping section 803 respectively, so that the sample holder support ring 3 maintains continuous contact when it enters the stable clamping position from the guide position. The arc-shaped clamping section 803 then applies pressure to the outer peripheral surface of the workpiece tangentially along the interface, thereby reducing the impact, indentation and end rolling caused by abrupt edge changes.

[0037] Two guide slopes 801 are positioned opposite each other about the center of the interface, and two arc-shaped clamping sections 803 are located on both sides of the interface. The interface is located between two clamping blocks 5. By positioning the two guide slopes 801 opposite each other about the center of the interface, the two clamping blocks 5 apply tangential forces to both ends of the interface in opposite directions and towards the center of the interface when they descend. The two arc-shaped clamping sections 803 clamp the two sides of the interface without covering the center of the interface. This allows the two ends to maintain the engagement tendency while reserving space for joint heating, upsetting, and welding observation, and reduces the possibility of the end faces tilting due to the clamping position being biased to one side.

[0038] Each interface guide groove 2201 is provided along the extension direction of the end of the sample rack support ring 3. The two side walls of the interface guide groove 2201 are arranged on both sides of the end of the sample rack support ring 3, and the bottom of the interface guide groove 2201 is located below the end of the sample rack support ring 3. The guide ramp 2202 is set at one end of the interface guide block 22 facing the interface of the sample holder support ring 3. The distance between the two guide ramps 2202 increases in the direction closer to the interface. The two interface guide blocks 22 form a welding avoidance space on both sides of the interface. The two side walls of the interface guide groove 2201 are set on both sides of the end of the sample holder support ring 3 and the bottom of the groove is set below the end. This allows the interface guide groove 2201 to simultaneously limit the lateral position and lower height of the end. The distance between the two guide ramps 2202 increases in the direction closer to the interface. This allows the interface guide block 22 to avoid the center of the interface while maintaining the end limit, thereby increasing the space for the clamping block 5 to approach the joint, the welding current to pass through the joint, and the operator to observe the joint.

[0039] The length direction of the level 601 is parallel to the length direction of the transverse guide rod 6. When the lower ends of the two clamping blocks 5 are at the same height, the axis of the transverse guide rod 6 is parallel to the upper surface of the positioning base 2, making the length direction of the level 601 parallel to the length direction of the transverse guide rod 6. The state of the transverse guide rod 6 being parallel to the upper surface of the positioning base 2 when the lower ends of the two clamping blocks 5 are at the same height is used as the observation benchmark. The height difference between the two clamping blocks 5 is converted into the tilt of the transverse guide rod 6 and the display offset of the level 601. Thus, the consistency of the downward pressure of the two clamping positions can be intuitively judged without adding an automatic detection and control system.

[0040] Multiple arc-shaped support blocks 10 are distributed at intervals along the circumference of the turntable 15, and multiple arc-shaped support grooves 1001 face the axis of the turntable 15. The multiple arc-shaped support grooves 1001 together form an annular support area of ​​the sample rack support ring 3. The multiple arc-shaped support blocks 10 are distributed at intervals along the circumference of the turntable 15, and the multiple arc-shaped support grooves 1001 together face the axis of the turntable 15 to form an annular support area. This allows the sample rack support ring 3 to be supported by multiple circumferential positions, reducing local sagging and elliptical deformation caused by single-point or double-point support, and providing a unified circular reference for the subsequent positioning of the interface guide block 22, the arc-shaped clamping block 20 and the clamping block 5.

[0041] The specific workflow of this invention is as follows: The sample rack support ring 3 is placed in the arc-shaped support groove 1001 of multiple arc-shaped support blocks 10, so that the interface of the sample rack support ring 3 is located between two interface guide blocks 22. The two ends of the sample rack support ring 3 enter the interface guide groove 2201 along the guide slope 2202 respectively. The interface guide groove 2201 performs radial limiting and height correction on the two ends, so that the two end faces correspond to each other.

[0042] The motor 11 drives the main bevel gear 13 to move through the drive shaft 12. The main bevel gear 13 meshes with the transmission gear ring 14 and drives the turntable 15 to rotate. The progressive threaded strip 16 on the turntable 15 cooperates with the progressive threaded groove 17 on the radial positioning slide 9, so that multiple radial positioning slides 9 move synchronously toward the sample frame support ring 3. The arc-shaped support block 10 supports and corrects the sample frame support ring 3 from different radial positions, so that the two sides of the interface are on the same circumferential reference.

[0043] Gas enters cylinder clamp 19 through gas pipe interface 18. Cylinder clamp 19 drives arc-shaped clamping block 20 to move along guide post 21. The two arc-shaped clamping blocks 20 act on both sides of the interface and push the two ends of sample holder support ring 3 toward the center of the interface, so that the two end faces complete the initial alignment under the restriction of interface guide groove 2201.

[0044] The two clamping cylinders 4 operate independently. The output end of one clamping cylinder 4 drives the transverse guide rod 6 to move downward, and the output end of the other clamping cylinder 4 drives the connecting slider 7 to move downward. The transverse guide rod 6 and the connecting slider 7 are movably connected, so that there is a relative movement margin between the transverse guide rod 6 and the connecting slider 7, so as to avoid rigidly pushing each other or causing the mechanism to jam when there is a slight difference in the stroke of the two clamping cylinders 4.

[0045] Two clamping cylinders 4 drive the corresponding clamping blocks 5 to descend. The two clamping blocks 5 press on both sides of the interface of the sample rack support ring 3 and avoid the center of the interface. The sample rack support ring 3 first contacts the guide slope 801 at the front end of the arc-shaped pressure groove 8. The two guide slopes 801 are set facing each other towards the center of the interface. When the clamping blocks 5 continue to descend, the guide slopes 801 convert part of the vertical clamping force into a tangential force pointing towards the center of the interface, thereby pushing the two ends of the interface to move closer together.

[0046] As the clamping block 5 continues to descend, the sample holder support ring 3 enters the arc clamping section 803 from the guide slope 801 through the arc transition surface 802. The arc transition surface 802 eliminates the abrupt sharp angle between the guide slope 801 and the arc clamping section 803, reducing the impact and local indentation generated during the clamping process. The arc clamping section 803 fits against the outer peripheral surface of the sample holder support ring 3, using arc surface contact to disperse the clamping force, while limiting rolling, radial lateral displacement and local warping on both sides of the interface.

[0047] The level 601 on the horizontal guide rod 6 is used to display the actual downward pressure difference between the two clamping cylinders 4. When the extension of the two clamping cylinders 4 is the same, the horizontal guide rod 6 remains horizontal and the bubble of the level 601 is located at the center mark. When there is a difference in the extension of the two clamping cylinders 4, the horizontal guide rod 6 tilts relative to the connecting slider 7 and the bubble of the level 601 deviates from the center mark. The operator adjusts the air pressure, throttle valve or clamping stroke accordingly to make the clamping state on both sides of the interface nearly consistent. It should be noted that the level 601 is only used to observe the downward pressure state on both sides and does not directly control the synchronous movement of the two clamping cylinders 4.

[0048] After the clamping is completed, the welding machine inputs welding current to both sides of the interface. The clamping block 5 maintains stable conductive contact with the sample holder support ring 3. The current flows through the interface through both ends of the sample holder support ring 3. The contact resistance at the interface generates concentrated heat and makes the end face reach a plasticized state. At the same time, the arc-shaped clamping block 20 and the guide inclined surface 801 continuously apply the extrusion force pointing towards the center of the interface, so that the two end faces complete the resistance welding and upsetting combination.

[0049] After welding is completed, the welding current is cut off. The two clamping cylinders 4 retract and drive the transverse guide rod 6, connecting slider 7 and clamping block 5 to reset upward. The cylinder clamp 19 drives the arc clamping block 20 to exit. The motor 11 drives the turntable 15 in the opposite direction, so that the radial positioning slide 9 and arc support block 10 reset outward, releasing the positioning of the sample frame support ring 3. Then the welded sample frame support ring 3 is taken out.

Claims

1. A welding device for processing a sample holder support ring, comprising a frame (1), a positioning base (2), two clamping cylinders (4), and two clamping blocks (5), wherein the positioning base (2) is disposed on the frame (1), and the two clamping cylinders (4) are disposed above the positioning base (2) and respectively connected to the two clamping blocks (5) in a transmission manner, characterized in that: The positioning base (2) is provided with multiple radial positioning slides (9) spaced apart along the circumference. Each radial positioning slide (9) is provided with an arc-shaped support block (10). The arc-shaped support block (10) is provided with an arc-shaped support groove (1001) for supporting the sample rack support ring (3). The positioning base (2) is provided with two interface guide blocks (22) arranged on both sides of the interface of the sample rack support ring (3). Each interface guide block (22) has an interface guide groove (2201) and an inlet slope (2202) extending to the groove opening of the interface guide groove (2201). Two clamping blocks (5) are arranged above the two sides of the interface and electrically connected to the two output ends of the welding machine. Both clamping blocks (5) are welding electrodes. Each clamping block (5) has an arc-shaped pressure groove (8) on the side facing the sample holder support ring (3). The arc-shaped pressure groove (8) includes a guide slope (801), an arc transition surface (802), and an arc clamping section (803). The guide slope (801) is located at the end of the arc-shaped pressure groove (8) facing the interface. The arc transition surface (802) connects the guide slope (801) and the arc clamping section (803). The guide slopes (801) on the two clamping blocks (5) are arranged facing each other.

2. The welding device for processing a sample holder support ring according to claim 1, characterized in that: A turntable (15) is rotatably mounted on the positioning base (2). A transmission gear ring (14) is fixedly mounted on the outer periphery of the turntable (15). A motor (11) is mounted on the positioning base (2). A drive shaft (12) is connected to the output end of the motor (11). The drive shaft (12) is fixedly connected to the main bevel gear (13). The main bevel gear (13) meshes with the transmission gear ring (14).

3. The welding device for processing a sample holder support ring according to claim 2, characterized in that: The turntable (15) is provided with a progressive threaded bar (16) extending from the axis of the turntable (15) on the side facing the radial positioning slide (9). The radial positioning slide (9) is provided with a progressive threaded groove (17) on the side facing the turntable (15). The progressive threaded bar (16) meshes with the progressive threaded grooves (17) on the multiple radial positioning slides (9). The moving directions of the multiple radial positioning slides (9) all pass through the axis of the turntable (15).

4. The welding device for processing a sample holder support ring according to claim 1, characterized in that: The positioning base (2) is provided with two cylinder clamps (19) arranged on both sides of the interface. The output ends of the two cylinder clamps (19) are respectively connected to arc-shaped clamping blocks (20). The moving direction of the two arc-shaped clamping blocks (20) is directed towards the center of the sample rack support ring (3). A guide post (21) is provided between the arc-shaped clamping block (20) and the positioning base (2). The cylinder clamp (19) is provided with an air pipe interface (18) that communicates with the working chamber of the cylinder clamp (19).

5. The welding device for processing a sample holder support ring according to claim 1, characterized in that: One of the clamping cylinders (4) is movably connected to the transverse guide rod (6), and the other clamping cylinder (4) is movably connected to the connecting slider (7). The connecting slider (7) is sleeved on the transverse guide rod (6) and slidably connected to the transverse guide rod (6). A level (601) is fixedly installed on the transverse guide rod (6). The two clamping blocks (5) are respectively installed at the lower part of the transverse guide rod (6) and the connecting slider (7).

6. The welding device for processing a sample holder support ring according to claim 1, characterized in that: The groove surface of the arc pressing section (803) is a cylindrical surface that extends tangentially along the interface of the sample holder support ring (3). The guide slope (801) is inclined upward along the direction close to the interface. The arc transition surface (802) is tangent to the guide slope (801) and the arc pressing section (803) respectively.

7. The welding device for processing a sample holder support ring according to claim 6, characterized in that: The two guide slopes (801) are arranged opposite each other about the center of the interface, and the two arc clamping sections (803) are located on both sides of the interface, with the interface located between the two clamping blocks (5).

8. The welding device for processing a sample holder support ring according to claim 1, characterized in that: Each of the interface guide grooves (2201) is provided along the extension direction of the end of the sample rack support ring (3), the two side walls of the interface guide groove (2201) are arranged on both sides of the end of the sample rack support ring (3), and the bottom of the interface guide groove (2201) is located below the end of the sample rack support ring (3). The inlet ramp (2202) is located at one end of the interface guide block (22) facing the interface of the sample holder support ring (3). The distance between the two inlet ramps (2202) increases in the direction close to the interface. The two interface guide blocks (22) form a welding avoidance space on both sides of the interface.

9. The welding device for processing a sample holder support ring according to claim 5, characterized in that: The length direction of the level (601) is parallel to the length direction of the transverse guide rod (6). When the lower ends of the two clamping blocks (5) are at the same height, the axis of the transverse guide rod (6) is parallel to the upper surface of the positioning base (2).

10. The welding device for processing a sample holder support ring according to claim 3, characterized in that: Multiple arc-shaped support blocks (10) are distributed circumferentially along the turntable (15), and multiple arc-shaped support grooves (1001) face the axis of the turntable (15). The multiple arc-shaped support grooves (1001) together form the annular support area of ​​the sample rack support ring (3).

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