Argon arc welding equipment

Abstract

The invention discloses argon arc welding equipment and belongs to the technical field of welding equipment.The argon arc welding equipment comprises a base and clamping assemblies and further comprises a vertical frame, the clamping assemblies comprise the first clamping assembly and the second clamping assembly, the first clamping assembly is fixed to the vertical frame, and the second clamping assembly is installed on the vertical frame or the base; the first clamping assembly and the second clamping assembly are each provided with a workpiece clamping cavity. The second clamping assembly comprises a chuck jaw and a chuck seat, the chuck seat is provided with a driving mechanism, and the first clamping assembly is provided with a roller; the cooling assembly is fixed on the chuck seat; the cooling assembly comprises a heat conduction cylinder with a plurality of heat conduction sheets; the cooling assembly is provided with a cold fluid flowing pipeline, a heat transfer structure is arranged between the cold fluid flowing pipeline and the heat conducting fin, and the welding device is suitable for welding of the circular weld joint on the side face of the long-shaft-shaped workpiece and has the advantage of being capable of guaranteeing the quality of the welded workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to a argon arc welding equipment. Background Art

[0002] Argon arc welding, also known as tungsten inert gas welding (TIG welding), is a welding technology that uses argon as a shielding gas. Different from other welding methods, its notable features include: high current density and concentrated heat, which makes it easy to obtain high welding efficiency and ensure the deposition rate; it can form a dense weld joint, reduce the burning of alloy elements in the material during welding, and obtain a highly reliable joint; the arc burns stably, making the welding process controllable and the welding quality highly reliable; the metal material has a wide range of applications; the welding process is easy to observe, which helps to ensure and control the welding quality; the welding electrode and arc length are stable during the welding process, and it is easy to further ensure the welding quality and improve the welding efficiency through automated welding. Argon arc welding is particularly suitable for applications with high requirements on the quality of the welded joint and high requirements on the post-weld performance of the workpiece.

[0003] Regarding automated / mechanized equipment for implementing argon arc welding and suitable for obtaining circular welding joints / implementing circular weld seam welding on tubular workpieces, a related technical scheme is disclosed in the patent document with patent application number CN 202021992744.3. In this scheme, the stainless steel cylinder is fixed by a rotating chuck, and the stainless steel cylinder is driven to rotate with the rotating chuck by a rotating motor. During the rotation process, a circular weld seam is welded using a welding gun located on the side of the stainless steel cylinder. The welding gun adjusts the welding gun position and welding gun angle under the action of a slide rail rack mechanism, a slide table, an adjusting motor, a swing cylinder, a fixing frame, etc., so that the welding gun can efficiently complete the welding of the bottom cover and the stainless steel cylinder within a small range of motion.

[0004] In the prior art, there is no argon arc welding equipment suitable for long-axis workpieces. Summary of the invention

[0005] In response to the need for welding circular annular welds on the side of long-axis workpieces, the present invention provides an argon arc welding device. The argon arc welding device is not only suitable for welding circular annular welds on the side of long-axis workpieces, but also has the characteristic of ensuring the quality of the workpiece after welding from the perspective of the influence of welding heat on material properties.

[0006] In view of the above problems, the present invention provides an argon arc welding device to solve the problems through the following technical points: an argon arc welding device, comprising a base, a clamping assembly connected to the base, and a stand with a lower end fixed to the base, the clamping assembly comprising a first clamping assembly and a second clamping assembly, the first clamping assembly is fixed to the stand, the second clamping assembly is installed on the stand or the base, and the first clamping assembly and the second clamping assembly are both provided with a workpiece clamping cavity, and the workpiece clamping cavities of the two are located on the same straight line; The second clamping assembly is a chuck clamping assembly including a chuck jaw and a chuck seat, the chuck jaw is movably connected to the chuck seat, the workpiece clamping cavity of the second clamping assembly is formed between the chuck jaws, the chuck seat is provided with a driving mechanism for driving the chuck seat to rotate around its own axis, and the first clamping assembly is provided with a roller as a contact member on the first clamping assembly for contacting the workpiece and can rotate with the workpiece; It also includes a cooling assembly fixed on the chuck seat, the cooling assembly includes a heat-conducting cylinder having a plurality of heat-conducting sheets, the heat-conducting sheets are arranged at intervals in the circumferential direction of the heat-conducting cylinder, the heat-conducting cylinder is coaxial with the workpiece clamping cavity of the second clamping assembly, and the heat-conducting sheets are located on a side of the second clamping assembly close to the first clamping assembly; The cooling assembly is provided with a cold fluid flow pipeline, and a heat transfer structure is provided between the cold fluid flow pipeline and the heat conducting plate.

[0007] When the present scheme is used to weld a workpiece to be welded, the first clamping assembly and the second clamping assembly are used to clamp the workpiece, and the workpiece clamping position is located in the workpiece clamping cavity of the above two. The specific method of clamping the workpiece may be: by operating the second clamping assembly, the chuck claws thereon move inward, and the workpiece between the chuck claws completes the clamping of the lower end of the workpiece during the shrinking process, and then, the first clamping assembly is operated to reduce the workpiece clamping cavity thereon, and cooperate with the workpiece to clamp the middle section and / or upper section of the workpiece through a roller. After completing the above clamping operation, the second clamping assembly is driven to rotate by a driving mechanism acting on the clamping claw seat, and the workpiece completes the welding of the circular weld seam thereon under the action of the welding gun assembly during the rotation of the second clamping assembly.

[0008] In order to better illustrate the present solution, the following description is made by taking the stroke sleeve on the control rod drive mechanism as the workpiece. In the prior art, the stroke sleeve and the pressure shell on the control rod drive mechanism of a nuclear reactor can be manufactured separately and the two can be made of different materials. When connected later, there is an Ω weld between the stroke sleeve and the pressure shell. In order to ensure the sealing reliability and life of the Ω weld, it can be set that the basis for forming the Ω weld on the stroke sleeve is an annular structure welded on the outside of the stroke sleeve, located at the orifice end of the stroke sleeve (there is a blind hole on the stroke sleeve, the lower end of the stroke sleeve is the orifice end, and the upper end is the blind end), and made of the same material as the pressure shell. The annular structure is welded on the reducing section at the lower end of the stroke sleeve (the side of the reducing section is used to form a connecting thread for threaded connection with the pressure shell), and the upper and lower ends of the annular structure and the pressure shell both have annular welds, and the notch to be welded for forming the upper annular weld faces the blind end of the stroke sleeve, and the annular structure for forming the lower annular weld is welded on the reducing section at the lower end of the stroke sleeve (the side of the reducing section is used to form a connecting thread for threaded connection with the pressure shell). The notch of the welding groove faces the outside of the stroke sleeve. In order to ensure the welding quality, for the welding groove used to form the upper annular weld, it is advisable to weld it with the stroke sleeve upright. The welding groove is suitable for welding annular welds using this equipment. This scheme is configured to include a first clamping component and a second clamping component. When the first clamping component is used to clamp the middle section or the upper end of the stroke sleeve and the second clamping component is used to clamp the lower end of the stroke sleeve, for such a long-axis workpiece, when the driving mechanism is actuated, the welding is completed by rotating the workpiece and fixing the welding gun. Since clamping support is provided for the workpiece at different positions in the axial direction of the workpiece, this scheme can effectively ensure the rotation accuracy of the workpiece during rotation and ensure the stability of the workpiece during rotation. This can not only ensure the welding quality, but also ensure the welding efficiency.

[0009] Due to the use environment of the stroke sleeve and the above Ω weld as a component of the boundary of the reactor primary loop, it is required that the annular structure and the stroke sleeve have a high-quality welding joint. Argon arc welding is a welding technology that can ensure the quality of the welding joint and the performance of the material after welding. During the implementation process, although the energy is concentrated, due to the high welding temperature, there are also a lot of heat introduction problems in the stroke sleeve and the annular structure. From the perspective of the adverse effects of welding heat on the post-welding performance of the material, this solution provides a cooling component based on the characteristics that the corresponding welding groove is close to the lower end of the stroke sleeve. The cooling component includes a heat-conducting tube, the heat-conducting tube includes multiple heat-conducting sheets, and the heat-conducting tube is coaxial with the corresponding workpiece clamping cavity. Specifically, the heat-conducting sheet extends above the second clamping assembly. When the lower end of the sleeve is embedded in the second clamping assembly, the heat conducting sheet is embedded in the stroke sleeve. Since the heat conducting sheets are arranged at intervals in the circumferential direction of the heat conducting tube, in specific use, the gaps between the heat conducting sheets allow the heat conducting sheets to be pushed, and the heat conducting tube is expanded by utilizing the deformation of the heat conducting sheets, so that the outer side of the heat conducting sheet is in contact with the inner wall of the stroke sleeve, and a heat conduction relationship between the heat conducting tube and the stroke sleeve is established. When the welding heat is transferred to the heat conducting tube through the contact between the heat conducting tube and the inner wall of the stroke sleeve, the heat on the heat conducting tube is then transferred to the cold fluid in the cold fluid flow pipeline by the heat transfer structure. Through the circulation of the cold fluid, the heat on the stroke sleeve and the annular structure during the welding process can be forced to be discharged, so as to achieve the purpose of ensuring the quality of the workpiece after welding from the perspective of the influence of welding heat on material properties.

[0010] It is easy to understand that as a complete set of products, this solution also includes a welding gun assembly, which includes a TIG welding gun. According to needs, it is set to also include a wire filling mechanism, a welding gun fine-tuning structure, a welding swing mechanism, an arc length tracking mechanism, etc. The driving mechanism can drive the chuck seat by a spindle box motor, and drive the chuck seat to rotate through gear transmission. In addition, since there is also an annular weld located at the lower end of the annular structure, it is set that the second clamping assembly is connected to the base through a flip assembly, so that the second clamping assembly can achieve a flip working range of 0°~N° (N° is greater than or equal to 90°) under the action of the flip assembly as a positioner, and is suitable for vertical welding of annular welds (welding of the upper end of the annular structure) and horizontal welding of annular welds (welding of the lower end of the annular structure). When used for welding a workpiece for a travel sleeve, the number of the first clamping assembly is greater than or equal to 2. Of course, this solution is also suitable for welding long-axis workpieces other than travel sleeves. It is easy to understand that when used for welding annular welds on the side of a long-axis workpiece, when the long-axis workpiece is fixed vertically, the first clamping assembly and the second clamping assembly are both used to clamp the workpiece. When the second clamping assembly is flipped over to fix the long-axis workpiece horizontally, only the second clamping assembly is used to clamp one end of the workpiece, and the other end of the workpiece is supported by other simple ground support methods.

[0011] As a further technical solution of the argon arc welding equipment: The cooling assembly also includes a cooling disk of a plate-ring structure, wherein the cooling disk has a cold fluid flow pipeline; The heat conducting sheet is a sheet structure divided by strip grooves on the heat conducting tube, the strip grooves start from the upper end of the heat conducting tube and pass through the inner and outer sides of the heat conducting tube, and the lower end of the strip grooves is located above the lower end surface of the heat conducting tube; The lower end of the heat-conducting tube is fixed on the cooling plate, and the heat-conducting tube is in surface contact with the cooling plate; A conical hole section with a large end located at the upper end is provided between the heat conducting sheets.

[0012] The above provides a specific cooling component implementation form, which can be used as the lower end of the cooling plate is supported on the chuck seat, the lower end of the travel sleeve is supported on the upper end of the cooling plate, and an avoidance groove is provided on the inner bottom side of the chuck jaw, and the avoidance groove is used to prevent the cooling plate from interfering with the inward movement of the chuck jaw when the chuck jaw clamps the travel sleeve. In this solution, the cooling plate carries the cold fluid flow pipeline and fixes the lower end of the heat-conducting tube. The lower end of the heat-conducting tube can be a rigid complete ring (the strip groove does not penetrate to the lower end of the heat-conducting tube) to constrain the heat-conducting tube to be an integral structure. The lower end of the heat-conducting tube contacts the surface of the cooling plate to ensure the heat conductivity between the heat-conducting tube and the cooling plate. The tapered hole section is used to adapt to the following tapered sleeve: by pulling down the tapered sleeve, the upper end of the heat-conducting tube is forced to expand under the oblique downward thrust of the tapered shaft section on the tapered sleeve on the tapered hole section, thereby realizing the expansion function of the cooling component. The outer side of the heat-conducting plate and the inner side of the stroke sleeve form a contact heat transfer surface. After removing the effect of the tapered sleeve on the tapered hole section, the heat-conducting plate forces the upper end of the heat-conducting tube to shrink in diameter through elastic rebound, and the heat-conducting plate and the stroke sleeve are transformed into a loose fit, which is convenient for removing the welded stroke sleeve from the equipment.

[0013] The heat-conducting tube structure, the connection method between the heat-conducting tube and the cooling plate, and the method of using the tapered hole section to expand the cooling assembly adopted in this scheme can utilize the radial force of the heat-conducting plates on the stroke sleeve at the upper end of the heat-conducting tube to correct the deviation of the stroke sleeve during the clamping process.

[0014] The cooling assembly also includes a sleeve shaft, a pipe joint, a connecting rod, and a connecting cylinder; The upper end of the cooling plate is butted against the lower end of the heat-conducting tube, the lower end of the cooling plate is butted against the upper end of the connecting tube, there are multiple connecting rods, the upper end of each connecting rod is butted against the lower end of the connecting tube, and the lower end of each connecting rod is butted against the upper end of the sleeve shaft; The heat-conducting cylinder is a cylindrical structure, the cooling plate is a disc-shaped plate ring, the connecting cylinder is a cylindrical structure, and the sleeve shaft is a cylindrical structure; The axes of the heat-conducting tube, the cooling plate, the connecting tube and the sleeve shaft are coaxial; The connecting rods are evenly distributed in an annular pattern around the axis; There are two pipe joints arranged on the sleeve shaft, and each pipe joint is butted with the inlet and outlet ends of the cold fluid flow pipeline in the cooling disk through a pipeline.

[0015] The above scheme provides a further implementation form of the cooling component. Specifically, the sleeve shaft serves as a structure for establishing a cold fluid circulation connection between the cold fluid flow pipeline and the external water circulation system (such as an external water circulation system including a circulating water tank). The connecting rods are surrounded by a cage-like structure to utilize the space between the connecting rods as an operating channel for realizing the rotating cone sleeve operation. The connecting cylinder can be used as a connecting mechanism for establishing a threaded connection with the cone sleeve. It is preferably configured so that the connection position of the cone sleeve on the connecting cylinder is located at the lower end of the connecting cylinder to better constrain the axial position of the cone sleeve when the cone sleeve extrude the conical hole section. The four are coaxial in order to match the need for the cooling component to rotate with the chuck seat, so as to optimize the stability of the device when the second clamping component rotates by controlling the center of gravity of the cooling component. The two connecting pipe heads are: one of the connecting pipe heads is used as a connecting pipe head for water inlet, and the other pipe joint is used as a pipe joint for water outlet. Each pipe joint establishes a cold fluid connection with different ends (inlet and outlet ends) of the cold fluid flow pipeline through different pipes.

[0016] The cooling assembly further includes a medium sleeve which is sleeved on the outer side of the sleeve shaft and is rotatable relative to the sleeve shaft, the medium sleeve is provided with a medium inlet pipe and a medium outlet pipe, the sleeve shaft is provided with a first flow path and a second flow path which are respectively communicated with different pipe joints, the medium inlet pipe is communicated with the first flow path through a first annular groove, and the medium outlet pipe is communicated with the second flow path through a second annular groove; The first annular groove and the second annular groove are both located on the outer side surface of the sleeve shaft and extend along the circumferential direction of the sleeve shaft. The first annular groove and the second annular groove are located at different axial positions of the sleeve shaft.

[0017] The above scheme provides a further implementation form of the cooling assembly. Specifically, when the second clamping assembly rotates, the sleeve shaft rotates with the second clamping assembly, and the sleeve shaft rotates relative to the medium sleeve. The medium inlet pipe and the medium outlet pipe are used to connect to the external water circulation system, and through the first annular groove, the second annular groove, and the first flow path and the second flow path on the sleeve shaft, respectively establish a conducting relationship with different pipe joints, that is, the sleeve shaft and the medium sleeve form a rotary cold fluid adapter, and respectively form an inlet flow path and an outlet flow path with different pipe joints. It is easy to understand that when the medium sleeve forms a relative rotation relationship with the sleeve shaft under the pull of the external pipeline, when the sleeve shaft rotates to any angle, it can establish a conducting relationship between the medium inlet pipe and the medium outlet pipe and different pipe joints through the first annular groove and the second annular groove. To ensure the conducting relationship, for example, the pipe opening that is connected to the medium inlet pipe and located on the inner side of the medium sleeve and the first annular groove are located at the same axial position of the sleeve shaft, and the pipe opening that is connected to the medium outlet pipe and located on the inner side of the medium sleeve and the second annular groove are located at the same axial position of the sleeve shaft.

[0018] The pipe joint is arranged on the upper end surface of the sleeve shaft and is symmetrical with respect to the axis of the sleeve shaft; The sleeve shaft is provided with a transition section, which is a reduced diameter section on the sleeve shaft. The first annular groove and the second annular groove are both located on the transition section. A sealing ring is arranged between the first annular groove and the second annular groove to achieve mutual sealing and isolation between the first annular groove and the second annular groove.

[0019] The above scheme provides a further implementation form of the cooling component. Specifically, the position of the above pipe joint is convenient to implement: the pipeline between the pipe joint and the cold fluid flow pipeline is arranged on the inner side of the cooling component, which can ensure the reliability of the cooling component from the perspective of interference from external unstable factors; the relative position of the pipe joint is beneficial to the control of the center of gravity position of the cooling component. The above is a transition section of the reduced diameter section, which is convenient for realizing the position constraint of the medium sleeve on the axis of the sleeve shaft, such as one end of the medium sleeve is constrained by the shoulder at the end of the transition section, and the other end of the medium sleeve is constrained by the end plate connected to the sleeve shaft. The sealing ring serves as an axial seal between the medium sleeve and the sleeve shaft, and is used to achieve water isolation between the first annular groove and the second annular groove. Preferably, sealing rings are provided on each side of the first annular groove and the second annular groove. For the sealing ring located on the side of the first annular groove away from the second annular groove, and the sealing ring located on the side of the second annular groove away from the first annular groove, these sealing rings are used to prevent the cold fluid from leaking to the outside of the cooling component.

[0020] It also includes a tapered sleeve, the tapered sleeve has a tapered shaft segment adapted to the tapered hole segment, the tapered sleeve is threadedly connected to the cooling assembly, and the tapered hole segment is coaxial with the tapered shaft segment; When the cone sleeve is rotated and moved downward along its axis relative to the cooling plate, the cone sleeve squeezes the cone hole section through the cone shaft section thereon, forcing the outer diameter of the upper end of the heat conducting tube to expand.

[0021] The above scheme provides a further implementation form of the cooling component. As described above, by rotating the tapered sleeve and utilizing the tapered shaft section on the pulled-down tapered sleeve to push the tapered hole section, the upper end of the heat-conducting tube can be inflated, forcing the outer diameter of the upper end of the heat-conducting tube to expand to be squeezed against the inner wall of the stroke sleeve, thereby enhancing welding heat conduction and correcting the deviation of the stroke sleeve during the clamping process.

[0022] The first clamping assembly includes a bottom plate, a guide rail disposed on the bottom plate, and a slide table slidably matched with the bottom plate through the guide rail; The number of the guide rails is greater than or equal to 2, and the guide rails are parallel to each other; The number of slides is 2, and each slide forms a sliding fit relationship with each guide rail; Each slide is equipped with a roller group, wherein the roller group includes two rollers that can rotate around their own axes, and the axes of the rollers are parallel to the straight line; The workpiece clamping cavity of the first clamping assembly is formed between the four rollers; The first clamping assembly is fixed to the stand through the bottom plate; Also included is a driver, which is used to change the position of the slide on the guide rail.

[0023] The above scheme provides an implementation form of a first clamping component. Specifically, guide rails whose number is greater than or equal to 2 and are parallel to each other are used to ensure the sliding trajectory accuracy of the slide. The number of slides is set to enable the first clamping component to synchronously clamp and loosen the stroke sleeve on a pair of opposite sides, thereby reducing the skew interference that may be caused to the stroke sleeve during the clamping process. Four rollers are used to provide four-point support for the stroke sleeve. The four-point support is arranged in the circumferential direction of the stroke sleeve to ensure the stability and reliability of clamping the stroke sleeve. The roller can rotate around itself to adapt to the rotation of the roller synchronously with the stroke sleeve. The driver changes the size of the corresponding workpiece clamping cavity by changing the position to achieve clamping and loosening of the stroke sleeve.

[0024] The driver is connected to one of the slides, and a linkage mechanism of a multi-link mechanism is arranged between the two slides; The linkage mechanism is used to achieve: When the driver is in motion, the driver drives the slide connected to it to slide along the guide rail, and the slide drives another slide to slide along the guide rail through the linkage mechanism; According to the driving direction of the driver, the motion states of the two slides can be switched between moving toward each other and moving away from each other.

[0025] The above provides a more specific implementation form of the first clamping assembly, which is: through a linkage mechanism, a driver is used to act on two slides, so that the two slides can slide synchronously along the guide rail on the basis of a simple structure, reducing the possibility of a single slide pushing the travel sleeve and causing the travel sleeve to be skewed. The above opposite movement process is the process of reducing the workpiece clamping cavity and achieving the clamping of the travel sleeve, and the above back movement process is the process of expanding the workpiece clamping cavity and achieving the loosening of the travel sleeve.

[0026] As a multi-link mechanism with a simple structure, the multi-link mechanism is configured to include a first link, a second link and a third link. The ends of the above three links are connected in series in sequence through a hinged rod. The first link is hingedly connected to the upper end of one of the slides, the second link is hingedly connected to the base plate through its middle part, and the third link is hingedly connected to the lower end of the other slide.

[0027] Each roller is equipped with a pressure measuring module for measuring the magnitude of the positive pressure between the roller and the workpiece.

[0028] In the above scheme, the detection results of the pressure measuring modules configured for each roller are used to determine whether the contact and extrusion of each roller and the stroke sleeve are synchronous. If the detection results of different pressure measuring modules at the same moment have a large deviation, it means that there is a large deviation in the axial direction of the stroke sleeve constrained by the second clamping assembly. At this time, while maintaining a certain clamping force of the second clamping assembly on the stroke sleeve, the axial direction of the stroke sleeve is adjusted, and the first clamping assembly is used to clamp the stroke sleeve again, so as to achieve the purpose of optimizing the rotation accuracy of the stroke sleeve under the action of the driving mechanism.

[0029] Both ends of each roller are equipped with a rotating shaft, and each roller is rotatably connected to the slide table through the rotating shaft at both ends; The pressure measuring module is fixed on the slide table, and is used to measure the radial supporting force provided by the slide table to the rotating shaft.

[0030] The above provides a specific method for setting up the pressure measurement module. For example, compared with setting the pressure measurement module on the roller, the radial support force provided by the slide to the rotating shaft is measured by a pressure measurement module at a fixed position on the slide, so as to obtain whether the contact and extrusion between the roller and the stroke sleeve are synchronized. In this way, the pressure measurement module can be set at a specific circumferential position of the rotating shaft (the side of the rotating shaft away from the workpiece clamping cavity of the first clamping assembly). The pressure measurement module of this scheme is easy to set up, and the current support status of the roller on the stroke sleeve can be stably obtained.

[0031] The present invention has the following beneficial effects: The present solution is configured to include a first clamping component and a second clamping component. When the first clamping component is used to clamp the middle section or the upper end of the travel sleeve and the second clamping component is used to clamp the lower end of the travel sleeve, for such a long-axis workpiece, when the driving mechanism is actuated, welding is completed by rotating the workpiece and fixing the welding gun. Since clamping support is provided for the workpiece at different positions in the axial direction of the workpiece, the present solution can effectively ensure the rotation accuracy of the workpiece during the rotation process and ensure the stability of the workpiece during the rotation process. This can not only ensure the welding quality, but also ensure the welding efficiency.

[0032] In the present solution, the gap between the heat conducting sheets allows the heat conducting sheets to be pushed and the heat conducting tube to be expanded by utilizing the deformation of the heat conducting sheets, so that the outer side of the heat conducting sheets is in contact with the inner wall of the travel sleeve, and a heat conduction relationship between the heat conducting tube and the travel sleeve is established. When the welding heat is transferred to the heat conducting tube through the contact between the heat conducting tube and the inner wall of the travel sleeve, the heat on the heat conducting tube is transferred to the cold fluid in the cold fluid flow pipeline by the heat transfer structure. Through the circulation of the cold fluid, the heat on the travel sleeve and the annular structure during the welding process can be forcibly discharged, so as to achieve the purpose of ensuring the quality of the workpiece after welding from the perspective of the influence of welding heat on material properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view of a specific embodiment of the argon arc welding equipment described in this scheme; Figure 2 for Figure 1 A partial enlarged view of the middle A part; Figure 3 This is a schematic diagram of the three-dimensional structure of a cooling assembly in a specific embodiment of the argon arc welding equipment described in this solution; Figure 4 This is a front view of a cooling assembly in a specific embodiment of the argon arc welding equipment described in this solution, and Figure 3 There is a difference. Figure 4 The medium sleeve is not shown; Figure 5 for Figure 2 Cross-sectional view of area B in the middle; Figure 6 for Figure 5 A partial enlarged view of the middle C area; Figure 7 for Figure 2 The cross-sectional view of area B in the middle, Figure 5 There is a difference. Figure 7 The cone sleeve is shown in; Figure 8 This is a schematic diagram of the three-dimensional structure of the first clamping assembly in a specific embodiment of the argon arc welding equipment described in this solution; Fig. 9 A bottom view of a first clamping assembly in a specific embodiment of the argon arc welding equipment described in this solution; Fig.10 This is a front view of the first clamping assembly in a specific embodiment of the argon arc welding equipment described in this scheme.

[0034] The reference numerals in the figure are respectively: 1. travel sleeve, 11. groove to be welded, 2. first clamping assembly, 21. bottom plate, 22. guide rail, 23. slide, 24. linkage mechanism, 25. roller group, 26. drive, 27. pressure measuring module, 3. stand, 4. welding gun assembly, 5. second clamping assembly, 51. chuck claw, 52. chuck seat, 6. flip assembly, 7. base, 8. cooling assembly, 81. heat conducting sheet, 82. cooling plate, 83. connecting cylinder, 84. connecting rod, 85. pipe joint, 86. medium sleeve, 87. sleeve shaft, 88. transition section, 89. strip groove, 810. conical hole section, 811. conical sleeve. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with embodiments, but the present invention is not limited to the following embodiments: Embodiment 1: like Figures 1 to 10As shown, a argon arc welding device includes a base 7, a clamping assembly connected to the base 7, and a stand 3 whose lower end is fixed to the base 7, wherein the clamping assembly includes a first clamping assembly 2 and a second clamping assembly 5, wherein the first clamping assembly 2 is fixed to the stand 3, and the second clamping assembly 5 is installed on the stand 3 or the base 7, and both the first clamping assembly 2 and the second clamping assembly 5 are provided with a workpiece clamping cavity, and the workpiece clamping cavities of the two are located on the same straight line; The second clamping assembly 5 is a chuck clamping assembly including a chuck jaw 51 and a chuck seat 52, the chuck jaw 51 is movably connected to the chuck seat 52, the workpiece clamping cavity of the second clamping assembly 5 is formed between the chuck jaws 51, the chuck seat 52 is provided with a driving mechanism for driving the chuck seat 52 to rotate around its own axis, and the first clamping assembly 2 is provided with a roller as a contact member on the first clamping assembly 2 for contacting the workpiece and can rotate with the workpiece; It also includes a cooling assembly 8 fixed on the chuck seat 52, the cooling assembly 8 includes a heat-conducting cylinder having a plurality of heat-conducting sheets 81, the heat-conducting sheets 81 are arranged at intervals in the circumferential direction of the heat-conducting cylinder, the heat-conducting cylinder is coaxial with the workpiece clamping cavity of the second clamping assembly 5, and the heat-conducting sheets 81 are located on a side of the second clamping assembly 5 close to the first clamping assembly 2; The cooling assembly 8 is provided with a cold fluid flow pipeline, and a heat transfer structure is provided between the cold fluid flow pipeline and the heat conducting sheet 81 .

[0036] When the present scheme is used to weld a workpiece to be welded, the first clamping assembly 2 and the second clamping assembly 5 are used to clamp the workpiece, and the workpiece clamping position is located in the workpiece clamping cavity of the above two. The specific method of clamping the workpiece can be: by operating the second clamping assembly 5, the chuck jaws 51 thereon move inward, and the workpiece between the chuck jaws 51 completes the clamping of the lower end of the workpiece during the shrinking process, and then, the first clamping assembly 2 is operated to reduce the workpiece clamping cavity thereon, and cooperate with the workpiece to clamp the middle section and / or upper section of the workpiece through a roller. After completing the above clamping operation, the second clamping assembly 5 is driven to rotate by a driving mechanism acting on the clamping jaw seat. During the rotation of the workpiece with the second clamping assembly 5, the circular weld seam on it is welded under the action of the welding gun assembly 4.

[0037] In order to better illustrate the present solution, the following description is made by taking the stroke sleeve 1 on the control rod drive mechanism as the workpiece. In the prior art, the stroke sleeve 1 and the pressure shell on the control rod drive mechanism of a nuclear reactor can be manufactured separately and the two can be made of different materials. When connected later, there is an Ω weld between the stroke sleeve 1 and the pressure shell. In order to ensure the sealing reliability and life of the Ω weld, it can be set that the foundation for forming the Ω weld on the stroke sleeve 1 is an annular structure welded on the outside of the stroke sleeve 1, located at the orifice end of the stroke sleeve 1 (the stroke sleeve 1 has a blind hole, the lower end of the stroke sleeve 1 is the orifice end, and the upper end is the blind end), and made of the same material as the pressure shell. The annular structure is welded on the reducing section at the lower end of the stroke sleeve 1 (the side of the reducing section is used to form a connecting thread for threaded connection with the pressure shell), and the upper and lower ends of the annular structure and the pressure shell both have annular welds, and the notch 11 for forming the upper annular weld faces the blind end of the stroke sleeve 1, and the notch 11 for forming the lower annular weld faces the blind end of the stroke sleeve 1. The notch of the groove 11 faces the outside of the stroke sleeve 1. In order to ensure the welding quality, for the groove 11 to be welded for forming the upper annular weld, it is advisable to weld it with the stroke sleeve 1 in an upright posture. The groove 11 to be welded is a groove 11 to be welded suitable for welding annular welds using this equipment. This scheme is configured to include a first clamping component 2 and a second clamping component 5. When the first clamping component 2 is used to clamp the middle section or upper end of the stroke sleeve 1 and the second clamping component 5 is used to clamp the lower end of the stroke sleeve 1, for such a long-axis workpiece, when the driving mechanism is actuated, the welding is completed by rotating the workpiece and fixing the welding gun. Since clamping support is provided for the workpiece at different positions in the axial direction of the workpiece, this scheme can effectively ensure the rotation accuracy of the workpiece during rotation and ensure the stability of the workpiece during rotation. This can not only ensure the welding quality, but also ensure the welding efficiency.

[0038] Due to the use environment of the stroke sleeve 1 and the above Ω weld as a component of the boundary of the reactor primary loop, it is required that the annular structure and the stroke sleeve 1 have a high-quality welding joint. Argon arc welding is a welding technology that can ensure the quality of the welding joint and the performance of the material after welding. During the implementation process, although the energy is concentrated, due to the high welding temperature, there are also a lot of heat introduction problems in the stroke sleeve 1 and the annular structure. From the perspective of the adverse effects of welding heat on the post-welding performance of the material, this solution provides a cooling component 8 based on the characteristics that the corresponding welding groove 11 is close to the lower end of the stroke sleeve 1. The cooling component 8 includes a heat-conducting tube, and the heat-conducting tube includes a plurality of heat-conducting sheets 81. The heat-conducting tube is coaxial with the corresponding workpiece clamping cavity. Specifically, the heat-conducting sheet 81 extends to the top of the second clamping assembly 5, and is located on the stroke sleeve 1. During the process of embedding the lower end into the second clamping assembly 5, the heat conducting sheet 81 is embedded into the stroke sleeve 1. Since the heat conducting sheets 81 are arranged at intervals in the circumferential direction of the heat conducting tube, in specific use, the gaps between the heat conducting sheets 81 allow the heat conducting tube to expand in diameter by pushing the heat conducting sheets 81 and utilizing the deformation of the heat conducting sheets 81, so that the outer side of the heat conducting sheet 81 is in contact with the inner wall of the stroke sleeve 1, and a heat conduction relationship between the heat conducting tube and the stroke sleeve 1 is established. When the welding heat is transferred to the heat conducting tube through the contact between the heat conducting tube and the inner wall of the stroke sleeve 1, the heat on the heat conducting tube is then transferred to the cold fluid in the cold fluid flow pipeline by the heat transfer structure. Through the circulation of the cold fluid, the heat on the stroke sleeve 1 and the annular structure during the welding process can be forced to be discharged, so as to achieve the purpose of ensuring the quality of the workpiece after welding from the perspective of the influence of welding heat on material properties.

[0039] It is easy to understand that as a complete set of products, this solution also includes a welding gun assembly 4, which includes a TIG welding gun. According to needs, it is set to also include a wire filling mechanism, a welding gun fine-tuning structure, a welding swing mechanism, an arc length tracking mechanism, etc. The driving mechanism drives the chuck seat 52 in a manner that a spindle box motor is used to drive the chuck seat 52 to rotate through a gear transmission. In addition, since there is also an annular weld at the lower end of the annular structure, it is set that the second clamping assembly 5 is connected to the base 7 through a flip assembly 6, so that the second clamping assembly 5 can achieve a flip working range of 0°~N° (N° is greater than or equal to 90°) under the action of the flip assembly 6 as a positioner, and is suitable for both vertical welding of annular welds (welding of the upper end annular weld of the annular structure) and horizontal welding of annular welds (welding of the lower end annular weld of the annular structure). When used for welding a workpiece for a travel sleeve 1, the number of the first clamping assembly 2 is greater than or equal to 2. Of course, this solution is also suitable for welding long-axis workpieces other than the travel sleeve 1. It is easy to understand that when used for welding annular welds on the side of a long-axis workpiece, when the long-axis workpiece is fixed vertically, the first clamping assembly 2 and the second clamping assembly 5 are both used to clamp the workpiece. When the second clamping assembly 5 is flipped over to fix the long-axis workpiece horizontally, only the second clamping assembly 5 is used to clamp one end of the workpiece, and the other end of the workpiece is supported by other simple ground support methods.

[0040] Embodiment 2: This embodiment is further refined on the basis of embodiment 1: The cooling assembly 8 also includes a cooling disk 82 of a plate-ring structure, wherein the cooling disk 82 has a cold fluid flow pipeline; The heat conducting sheet 81 is a sheet structure divided by the strip grooves 89 on the heat conducting tube. The strip grooves 89 start from the upper end of the heat conducting tube and pass through the inner and outer sides of the heat conducting tube. The lower end of the strip grooves 89 is located above the lower end surface of the heat conducting tube. The lower end of the heat-conducting tube is fixed on the cooling plate 82, and the heat-conducting tube is in surface contact with the cooling plate 82; There is a tapered hole section 810 between the heat conducting plates 81 with the larger end located at the upper end.

[0041] The above provides a specific implementation form of the cooling assembly 8, which can be used as the lower end of the cooling disk 82 is supported on the chuck seat 52, the lower end of the travel sleeve 1 is supported on the upper end of the cooling disk 82, and the inner bottom side of the chuck claw 51 is provided with an avoidance groove, which is used to prevent the cooling disk 82 from interfering with the inward movement of the chuck claw 51 during the process of the chuck claw 51 clamping the travel sleeve 1. In this scheme, the cooling disk 82 carries the cold fluid flow pipeline and fixes the lower end of the heat-conducting tube. The lower end of the heat-conducting tube can be a rigid complete ring (the strip groove 89 does not penetrate to the lower end of the heat-conducting tube) to constrain the heat-conducting tube to be an integral structure. The lower end of the heat-conducting tube is in surface contact with the cooling disk 82 to ensure the heat conduction capacity between the heat-conducting tube and the cooling disk 82. The conical hole section 810 is used to adapt to the following cone sleeve 811: by pulling down the cone sleeve 811, The tapered shaft section on 811 pushes the tapered hole section 810 obliquely downward to force the upper end of the heat-conducting tube to expand, thereby realizing the expansion function of the cooling component 8. The outer side of the heat-conducting sheet 81 and the inner side of the stroke sleeve 1 form a contact heat transfer surface. After the effect of the tapered sleeve 811 on the tapered hole section 810 is removed, the heat-conducting sheet 81 forces the upper end of the heat-conducting tube to shrink in diameter through elastic rebound, and the heat-conducting sheet 81 and the stroke sleeve 1 are transformed into a loose fit, which facilitates the removal of the welded stroke sleeve 1 from the equipment.

[0042] The heat-conducting tube structure, the connection method between the heat-conducting tube and the cooling plate 82, and the method of using the tapered hole section 810 to expand the cooling assembly 8 adopted in this scheme can utilize the radial force of the heat-conducting plates 81 on the upper end of the heat-conducting tube on the travel sleeve 1 to correct the deviation of the travel sleeve 1 during the clamping process.

[0043] Embodiment 3: This embodiment is further refined on the basis of Embodiment 2: The cooling assembly 8 also includes a sleeve shaft 87, a pipe joint 85, a connecting rod 84, and a connecting cylinder 83; The upper end of the cooling plate 82 is butted against the lower end of the heat-conducting tube, and the lower end of the cooling plate 82 is butted against the upper end of the connecting tube 83. There are multiple connecting rods 84, and the upper end of each connecting rod 84 is butted against the lower end of the connecting tube 83, and the lower end of each connecting rod 84 is butted against the upper end of the sleeve shaft 87. The heat-conducting cylinder is a cylindrical structure, the cooling plate 82 is a disc-shaped plate ring, the connecting cylinder 83 is a cylindrical structure, and the sleeve shaft 87 is a cylindrical structure; The axes of the heat-conducting tube, the cooling plate 82, the connecting tube 83 and the sleeve shaft 87 are coaxial; The connecting rods 84 are evenly distributed in an annular pattern around the axis; There are two pipe joints 85 disposed on the sleeve shaft 87 , and each pipe joint 85 is connected to the inlet and outlet ends of the cooling fluid flow pipeline in the cooling plate 82 through a pipeline.

[0044] The above scheme provides a further implementation form of the cooling assembly 8. Specifically, the sleeve shaft 87 is used as a structure for establishing a cold fluid circulation connection with an external water circulation system (such as an external water circulation system including a circulating water tank) as a cold fluid flow pipeline. The connecting rods 84 are surrounded by a cage-like structure to utilize the space between the connecting rods 84 as an operating channel for realizing the operation of rotating the cone sleeve 811. The connecting cylinder 83 can be used as a connecting mechanism for establishing a threaded connection with the cone sleeve 811. It is preferably configured so that the connection position of the cone sleeve 811 on the connecting cylinder 83 is located at the bottom of the connecting cylinder 83. end, so as to better constrain the axial position of the tapered sleeve 811 when extruding the tapered hole section 810. The four coaxialities are intended to match the need for the cooling component 8 to rotate with the chuck seat 52, so as to optimize the stability of the device when the second clamping component 5 rotates by controlling the center of gravity of the cooling component 8. The two connecting pipes are: one of the connecting pipes is used as a connecting pipe for water inlet, and the other pipe joint 85 is used as a pipe joint 85 for water outlet. Each pipe joint 85 is connected to the different ends (inlet and outlet ends) of the cold fluid flow pipeline through different pipelines to establish a cold fluid connection.

[0045] Embodiment 4: This embodiment is further refined on the basis of Embodiment 3: The cooling assembly 8 further includes a medium sleeve 86 which is sleeved on the outer side of the sleeve shaft 87 and is rotatable relative to the sleeve shaft 87. The medium sleeve 86 is provided with a medium inlet pipe and a medium outlet pipe. The sleeve shaft 87 is provided with a first flow path and a second flow path which are respectively communicated with different pipe joints 85. The medium inlet pipe is communicated with the first flow path through a first annular groove, and the medium outlet pipe is communicated with the second flow path through a second annular groove. The first annular groove and the second annular groove are both located on the outer side surface of the sleeve shaft 87 and extend along the circumferential direction of the sleeve shaft 87 . The first annular groove and the second annular groove are located at different axial positions of the sleeve shaft 87 .

[0046] The above scheme provides a further implementation form of the cooling component 8. Specifically, when the second clamping component 5 rotates, the sleeve shaft 87 rotates with the second clamping component 5, and the sleeve shaft 87 rotates relative to the medium sleeve 86. The medium inlet pipe and the medium outlet pipe are used to be connected to the external water circulation system, and through the first annular groove, the second annular groove, and the first flow path and the second flow path on the sleeve shaft 87, a conductive relationship with different pipe joints 85 is established respectively, that is, the sleeve shaft 87 and the medium sleeve 86 form a rotary cold fluid adapter, which respectively form a water inlet flow path and a water outlet flow path with different pipe joints 85. It is easy to understand that when the medium sleeve 86 forms a relative rotation relationship with the sleeve shaft 87 under the traction of the external pipeline, when the sleeve shaft 87 rotates to any angle, it can establish a conductive relationship between the medium inlet pipe and the medium outlet pipe and different pipe joints 85 respectively through the first annular groove and the second annular groove. To ensure the conductive relationship, for example, the pipe opening that is connected to the medium inlet pipe and located on the inner side of the medium sleeve 86 is located at the same axial position of the sleeve shaft 87 as the first annular groove, and the pipe opening that is connected to the medium outlet pipe and located on the inner side of the medium sleeve 86 is located at the same axial position of the sleeve shaft 87 as the second annular groove.

[0047] Embodiment 5: This embodiment is further refined on the basis of Embodiment 4: The pipe joint 85 is arranged on the upper end surface of the sleeve shaft 87 and is symmetrical with respect to the axis of the sleeve shaft 87; The sleeve shaft 87 is provided with a transition section 88, which is a reduced diameter section on the sleeve shaft 87. The first annular groove and the second annular groove are both located on the transition section 88. A sealing ring is arranged between the first annular groove and the second annular groove to achieve mutual sealing and isolation between the first annular groove and the second annular groove.

[0048] The above scheme provides a further implementation form of the cooling assembly 8. Specifically, the position of the above pipe joint 85 is convenient to implement: the pipeline between the pipe joint 85 and the cold fluid flow pipeline is arranged on the inner side of the cooling assembly 8, which can ensure the reliability of the cooling assembly 8 from the perspective of interference from external unstable factors; the relative position of the pipe joint 85 is beneficial to the control of the center of gravity position of the cooling assembly 8. The above adapter section 88, which is a reduced diameter section, is convenient for realizing the position constraint of the medium sleeve 86 on the axis of the sleeve shaft 87, such as one end of the medium sleeve 86 is constrained by the shoulder at the end of the adapter section 88, and the other end of the medium sleeve 86 is constrained by the end plate connected to the sleeve shaft 87. The sealing ring is used as an axial seal between the medium sleeve 86 and the sleeve shaft 87 to achieve water isolation between the first annular groove and the second annular groove. Preferably, sealing rings are provided on each side of the first annular groove and the second annular groove. For the sealing ring located on the side of the first annular groove away from the second annular groove, and the sealing ring located on the side of the second annular groove away from the first annular groove, these sealing rings are used to prevent the cold fluid from leaking to the outside of the cooling assembly 8.

[0049] Embodiment 6: This embodiment is further refined on the basis of Embodiment 2: It also includes a tapered sleeve 811, on which there is a tapered shaft section adapted to the tapered hole section 810, the tapered sleeve 811 is threadedly connected to the cooling assembly 8, and the tapered hole section 810 is coaxial with the tapered shaft section; In the process of rotating the conical sleeve 811 and moving the conical sleeve 811 downward along its axis relative to the cooling plate 82, the conical sleeve 811 squeezes the conical hole section 810 through the conical shaft section thereon, forcing the outer diameter of the upper end of the heat-conducting tube to expand.

[0050] The above scheme provides a further implementation form of the cooling component 8. As described above, by rotating the conical sleeve 811 and utilizing the conical shaft section on the pulled-down conical sleeve 811 to push the conical hole section 810, the upper end of the heat-conducting tube can be inflated, forcing the outer diameter of the upper end of the heat-conducting tube to expand to be squeezed against the inner wall of the stroke sleeve 1, thereby enhancing welding heat conduction and correcting the stroke sleeve 1 during the clamping process.

[0051] Embodiment 7: This embodiment is further refined on the basis of embodiment 1: The first clamping assembly 2 includes a bottom plate 21, a guide rail 22 disposed on the bottom plate 21, and a slide table 23 slidably matched with the bottom plate 21 through the guide rail 22; The number of the guide rails 22 is greater than or equal to 2, and the guide rails 22 are parallel to each other; The number of slides 23 is 2, and each slide 23 forms a sliding fit relationship with each guide rail 22; A roller group 25 is installed on each slide 23, and the roller group 25 includes two rollers that can rotate around their own axes, and the axes of the rollers are parallel to the straight line; The workpiece clamping cavity of the first clamping assembly 2 is formed between the four rollers; The first clamping assembly 2 is fixed to the stand 3 via a bottom plate 21; The guide rail 22 further comprises a driver 26 , which is used to change the position of the slide 23 on the guide rail 22 .

[0052] The above scheme provides an implementation form of a first clamping component 2. Specifically, guide rails 22, the number of which is greater than or equal to 2 and parallel to each other, are used to ensure the sliding trajectory accuracy of the slide 23. The number of slides 23 is set to enable the first clamping component 2 to synchronously clamp and loosen the stroke sleeve 1 on a pair of opposite sides, thereby reducing the skew interference that may be caused to the stroke sleeve 1 during the clamping process. Four rollers are used to provide four-point support for the stroke sleeve 1. The four-point support is arranged in the circumferential direction of the stroke sleeve 1 to ensure the stability and reliability of clamping the stroke sleeve 1. The rollers can rotate around themselves to adapt to the rotation of the rollers synchronously with the stroke sleeve 1. The driver 26 changes the size of the corresponding workpiece clamping cavity by changing the position to achieve clamping and loosening of the stroke sleeve 1.

[0053] Embodiment 8: This embodiment is further refined on the basis of Embodiment 7: The driver 26 is connected to one of the slides 23, and a linkage mechanism 24 of a multi-link mechanism is provided between the two slides 23; The linkage mechanism 24 is used to achieve: When the driver 26 is in motion, the driver 26 drives the slide 23 connected thereto to slide along the guide rail 22, and the slide 23 drives another slide 23 to slide along the guide rail 22 through the linkage mechanism 24; According to the driving direction of the driver 26 , the movement states of the two slides 23 can be switched between moving toward each other and moving away from each other.

[0054] The above provides a more specific implementation form of the first clamping assembly 2, which is: through the linkage mechanism 24, a driver 26 is used to act on the two slides 23, so that the two slides 23 slide along the guide rail 22 with synchronization on the basis of a simple structure, reducing the possibility that a single slide 23 pushes the stroke sleeve 1 and causes the stroke sleeve 1 to be skewed. The above opposite movement process is the process of reducing the workpiece clamping cavity and achieving the clamping of the stroke sleeve 1, and the above back movement process is the process of expanding the workpiece clamping cavity and achieving the loosening of the stroke sleeve 1.

[0055] As a multi-link mechanism implementation form with a simple structure, the multi-link mechanism is configured to include a first link, a second link and a third link. The ends of the above three links are connected in series in sequence through a hinged rod. The first link is hingedly connected to the upper end of one of the slides 23, the second link is hingedly connected to the base plate 21 through its middle part, and the third link is hingedly connected to the lower end of another slide 23.

[0056] Embodiment 9: This embodiment is further refined on the basis of Embodiment 7: Each roller is equipped with a pressure measuring module 27 for measuring the positive pressure between the roller and the workpiece.

[0057] In the above scheme, the detection results of the pressure measuring modules 27 configured for each roller are used to determine whether the contact and extrusion of each roller and the stroke sleeve 1 are synchronous. If the detection results of different pressure measuring modules 27 at the same moment have a large deviation, it means that there is a large deviation in the axial direction of the stroke sleeve 1 constrained by the second clamping assembly 5. At this time, while maintaining a certain clamping force of the second clamping assembly 5 on the stroke sleeve 1, the axial direction of the stroke sleeve 1 is adjusted, and the first clamping assembly 2 is used to clamp the stroke sleeve 1 again, so as to achieve the purpose of optimizing the rotation accuracy of the stroke sleeve 1 under the action of the driving mechanism.

[0058] Embodiment 10: This embodiment is further refined on the basis of Embodiment 9: Each roller is provided with a rotating shaft at both ends, and each roller is rotatably connected to the slide 23 through the rotating shaft at both ends; The pressure measuring module 27 is fixed on the slide 23 , and is used to measure the radial supporting force provided by the slide 23 for the rotating shaft.

[0059] The above provides a specific setting method of the pressure measuring module 27. For example, compared with setting the pressure measuring module 27 on the roller, the radial support force provided by the slide 23 to the rotating shaft is measured by the pressure measuring module 27 at a fixed position on the slide 23, so as to obtain whether the contact and extrusion between the roller and the stroke sleeve 1 are synchronous. In this way, the pressure measuring module 27 can be set at a specific circumferential position of the rotating shaft (the side of the rotating shaft away from the workpiece clamping cavity of the first clamping assembly 2). The pressure measuring module 27 of this scheme is easy to set up, and the current support state of the roller on the stroke sleeve 1 can be stably obtained.

[0060] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A argon arc welding device, comprising a base (7) and a clamping assembly connected to the base (7), characterized in that: It also comprises a stand (3) whose lower end is fixed on a base (7), the clamping assembly comprises a first clamping assembly (2) and a second clamping assembly (5), the first clamping assembly (2) is fixed on the stand (3), the second clamping assembly (5) is installed on the stand (3) or the base (7), and both the first clamping assembly (2) and the second clamping assembly (5) are provided with a workpiece clamping cavity, and the workpiece clamping cavities of the two are located on the same straight line; The second clamping assembly (5) is a chuck clamping assembly comprising a chuck jaw (51) and a chuck seat (52), the chuck jaw (51) being movably connected to the chuck seat (52), a workpiece clamping cavity of the second clamping assembly (5) being formed between the chuck jaws (51), the chuck seat (52) being provided with a driving mechanism for driving the chuck seat (52) to rotate around its own axis, and the first clamping assembly (2) being provided with a roller as a contact member on the first clamping assembly (2) for contacting the workpiece and being capable of rotating with the workpiece; It also includes a cooling assembly (8) fixed on the chuck seat (52), the cooling assembly (8) including a heat-conducting cylinder having a plurality of heat-conducting sheets (81), the heat-conducting sheets (81) being arranged at intervals in the circumferential direction of the heat-conducting cylinder, the heat-conducting cylinder being coaxial with the workpiece clamping cavity of the second clamping assembly (5), and the heat-conducting sheets (81) being located on a side of the second clamping assembly (5) close to the first clamping assembly (2); The cooling assembly (8) is provided with a cold fluid flow pipeline, and a heat transfer structure is provided between the cold fluid flow pipeline and the heat conducting sheet (81).

2. The argon arc welding equipment according to claim 1, characterized in that: The cooling assembly (8) further comprises a cooling disk (82) of a plate-ring structure, wherein a cold fluid flow pipeline is provided in the cooling disk (82); The heat conducting sheet (81) is a sheet structure formed by dividing the strip grooves (89) on the heat conducting tube, wherein the strip grooves (89) start from the upper end of the heat conducting tube and penetrate the inner and outer sides of the heat conducting tube, and the lower end of the strip grooves (89) is located above the lower end surface of the heat conducting tube; The lower end of the heat-conducting tube is fixed on the cooling plate (82), and the heat-conducting tube is in surface contact with the cooling plate (82); A conical hole section (810) with a larger end located at the upper end is provided between the heat conducting sheets (81).

3. The argon arc welding equipment according to claim 2, characterized in that: The cooling assembly (8) further comprises a sleeve shaft (87), a pipe joint (85), a connecting rod (84), and a connecting cylinder (83); The upper end of the cooling plate (82) is butt-jointed with the lower end of the heat-conducting tube, the lower end of the cooling plate (82) is butt-jointed with the upper end of the connecting tube (83), there are a plurality of connecting rods (84), the upper end of each connecting rod (84) is butt-jointed with the lower end of the connecting tube (83), and the lower end of each connecting rod (84) is butt-jointed with the upper end of the sleeve shaft (87); The heat-conducting cylinder is a cylindrical structure, the cooling disk (82) is a disc-shaped plate ring, the connecting cylinder (83) is a cylindrical structure, and the sleeve shaft (87) is a columnar structure; The axes of the heat-conducting tube, the cooling plate (82), the connecting tube (83) and the sleeve shaft (87) are coaxial; The connecting rods (84) are evenly distributed in an annular pattern around the axis; There are two pipe joints (85) arranged on the sleeve shaft (87), and each pipe joint (85) is butt-jointed with the inlet and outlet ends of the cooling fluid flow pipeline in the cooling plate (82) through a pipeline.

4. The argon arc welding equipment according to claim 3, characterized in that: The cooling assembly (8) further comprises a medium sleeve (86) sleeved on the outside of the sleeve shaft (87) and rotatable relative to the sleeve shaft (87); the medium sleeve (86) is provided with a medium inlet pipe and a medium outlet pipe; the sleeve shaft (87) is provided with a first flow path and a second flow path respectively connected to different pipe joints (85); the medium inlet pipe is connected to the first flow path via a first annular groove; and the medium outlet pipe is connected to the second flow path via a second annular groove; The first annular groove and the second annular groove are both located on the outer side surface of the sleeve shaft (87) and extend along the circumferential direction of the sleeve shaft (87). The first annular groove and the second annular groove are located at different axial positions of the sleeve shaft (87).

5. The argon arc welding equipment according to claim 4, characterized in that: The pipe joint (85) is arranged on the upper end surface of the sleeve shaft (87) and is symmetrical with respect to the axis of the sleeve shaft (87); The sleeve shaft (87) is provided with a transition section (88), the transition section (88) being a reduced diameter section on the sleeve shaft (87), the first annular groove and the second annular groove both being located on the transition section (88), and a sealing ring being arranged between the first annular groove and the second annular groove to achieve mutual sealing and isolation between the first annular groove and the second annular groove.

6. The argon arc welding equipment according to any one of claims 2 to 5, characterized in that: It also comprises a tapered sleeve (811), the tapered sleeve (811) having a tapered shaft segment adapted to the tapered hole segment (810), the tapered sleeve (811) being threadedly connected to the cooling assembly (8), and the tapered hole segment (810) being coaxial with the tapered shaft segment; In the process of rotating the conical sleeve (811) and causing the conical sleeve (811) to move downward along its axis relative to the cooling plate (82), the conical sleeve (811) squeezes the conical hole section (810) through the conical shaft section thereon, forcing the outer diameter of the upper end of the heat-conducting tube to expand.

7. The argon arc welding equipment according to claim 1, characterized in that: The first clamping assembly (2) comprises a base plate (21), a guide rail (22) arranged on the base plate (21), and a slide table (23) slidably engaged with the base plate (21) via the guide rail (22); The number of the guide rails (22) is greater than or equal to 2, and the guide rails (22) are parallel to each other; The number of slides (23) is 2, and each slide (23) forms a sliding fit relationship with each guide rail (22); A roller group (25) is mounted on each slide (23), wherein the roller group (25) comprises two rollers that can rotate around their own axes, and the axes of the rollers are parallel to the straight line; The workpiece clamping cavity of the first clamping assembly (2) is formed between four rollers; The first clamping assembly (2) is fixed to the stand (3) via a bottom plate (21); It also includes a driver (26), which is used to change the position of the slide (23) on the guide rail (22).

8. The argon arc welding equipment according to claim 7, characterized in that: The driver (26) is connected to one of the slides (23), and a linkage mechanism (24) which is a multi-link mechanism is provided between the two slides (23); The linkage mechanism (24) is used to achieve: When the driver (26) is in motion, the driver (26) drives the slide (23) connected thereto to slide along the guide rail (22), and the slide (23) drives another slide (23) to slide along the guide rail (22) through the linkage mechanism (24); According to the driving direction of the driver (26), the movement state of the two slides (23) can be switched between moving towards each other and moving away from each other.

9. The argon arc welding equipment according to claim 7, characterized in that: Each roller is equipped with a pressure measuring module (27) for measuring the magnitude of the positive pressure between the roller and the workpiece.

10. The argon arc welding equipment according to claim 9, characterized in that: Both ends of each roller are provided with a rotating shaft, and each roller is rotatably connected to the slide table (23) via the rotating shaft at both ends; The pressure measurement module (27) is fixed on the slide table (23), and the pressure measurement module (27) is used to measure the radial support force provided by the slide table (23) for the rotating shaft.

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