Welding heat treatment device and system for dissimilar metal shaft type thin-walled parts

Abstract

The invention provides a dissimilar metal shaft thin-wall part welding heat treatment device and system.The dissimilar metal shaft thin-wall part welding heat treatment device comprises a heating ring assembly, a fixing device and a temperature control module, and the fixing device is used for installing the heating ring assembly and adjusting the position of the heating ring assembly; the heating ring assembly is arranged outside a welding seam between a first shaft type thin-wall part and a second shaft type thin-wall part on the external positioner in a sleeving mode and used for heating the welding seam, and the first shaft type thin-wall part and the second shaft type thin-wall part are made of dissimilar metal materials; the temperature control module is electrically connected with the heating ring assembly. The device is simple in structure and convenient to operate, the annular heating structure capable of continuously preserving heat in the welding process is arranged on the outer side of the welding seam, the temperature change of base metal around the welding seam in the welding process can be effectively controlled, the welding temperature gradient is reduced, the stress state around the welding seam is improved, the occurrence probability of cracks in the welding seam is reduced, and the welding quality is improved; and the product qualification rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of dissimilar metal welding, and in particular to a device and system for heat treatment of dissimilar metal shaft thin-walled parts, especially a device for controlling the temperature of parts around the weld before and after high-energy beam welding of soft magnetic alloy-stainless steel shaft thin-walled parts, and a welding system comprising the device. Background Art

[0002] Soft magnetic materials have the advantages of low coercive force, easy magnetization and demagnetization, and low hysteresis loss. When combined with stainless steel materials, they can manufacture precision electromagnets and other structures, and are widely used in the aerospace field. Among them, the typical soft magnetic alloy 1J22 has low strength, poor toughness, strong sensitivity to defects, and poor welding performance after heat treatment. When the soft magnetic alloy is welded with austenitic stainless steel dissimilar metals, due to the difference in physical and chemical properties of the dissimilar metals, the internal stress generated during the welding process is higher than the yield limit of the material, and welding cracks are easily generated inside the weld, affecting the welding quality. Controlling the temperature change during the welding process is an important factor in improving the stress state of the weld.

[0003] In order to improve the stability of product quality, the existing technology mainly adopts two methods: optimizing process parameters and increasing the machining allowance of parts. Studies have shown that optimizing process parameters can reduce welding internal stress and thus reduce the occurrence of welding cracks. However, the process window obtained by this method is narrow, resulting in unreliable welding process, unstable welding quality, and difficulty in engineering application. As for increasing the machining allowance of parts, the internal quality of the weld cannot be guaranteed, and the manufacturing cost of the parts is increased. Therefore, the existing technology urgently needs to propose a method to improve weld stress by controlling temperature changes. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a welding heat treatment device and system for thin-walled parts such as dissimilar metal shafts.

[0005] The welding heat treatment device for thin-walled parts of dissimilar metal shafts provided by the present invention comprises a heating ring assembly, a fixing device and a temperature control module, wherein the fixing device is used to install the heating ring assembly and to adjust the position of the heating ring assembly; The heating ring assembly is sleeved on the outside of the weld between the first shaft-like thin-walled part and the second shaft-like thin-walled part on the external positioner and is used to heat the weld, wherein the first shaft-like thin-walled part and the second shaft-like thin-walled part are made of dissimilar metals; The temperature control module is electrically connected to the heating ring assembly.

[0006] Preferably, the heating ring assembly comprises an annular heating module and a high energy beam incident hole arranged on the top of the annular heating module; The position of the high-energy beam incident hole corresponds to the external laser, the annular heating module is circumferentially sleeved on the outside of the weld, and the temperature control module is connected to the annular heating module and is used to control the temperature change gradient of the weld before and after welding.

[0007] Preferably, the annular heating module is an induction heater.

[0008] Preferably, a gap is provided between the inner surface of the annular heating module and the first shaft-like thin-walled part and the second shaft-like thin-walled part.

[0009] Preferably, a cavity is formed between the inner surface of the annular heating module and the first shaft-like thin-walled part and the second shaft-like thin-walled part, and the cavity is filled with an inert gas to form an inert gas protection chamber.

[0010] Preferably, the bottom of the annular heating module is provided with an opening diameter-changing structure, and the opening diameter-changing structure includes a support ear structure and an adjusting bolt; An opening is provided at the bottom of the annular heating module, and ear structures are provided at the bottoms of both ends of the opening. A through hole is provided in the middle of the ear structure, and the adjusting bolt passes through the through holes of the ear structures at both ends of the opening to adjust the opening of the bottom opening of the annular heating module.

[0011] Preferably, the fixing device comprises a fixing part and a hinge bracket, the fixing part is fixedly mounted on the external processing plane, one end of the hinge bracket is connected to the fixing part, and the other end of the hinge bracket is fixedly connected to the heating ring assembly.

[0012] Preferably, the fixing portion is magnetically mounted on an external processing plane.

[0013] The welding system for dissimilar metal shaft thin-walled parts provided by the present invention comprises a laser, a gas protection device, a positioner, a welding work platform and the dissimilar metal shaft thin-walled parts welding heat treatment device; The positioner is installed on the welding work platform and is used to clamp the first shaft-type thin-walled part and the second shaft-type thin-walled part. The fixing device is installed on the welding work platform and is located on one side of the positioner. The laser is installed on the top of the high-energy beam incident hole of the heating ring assembly.

[0014] Preferably, one of the first shaft-like thin-walled part and the second shaft-like thin-walled part is a stainless steel shaft-like thin-walled part, and the other of the first shaft-like thin-walled part and the second shaft-like thin-walled part is a soft magnetic alloy shaft-like thin-walled part.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention has a simple structure and is easy to operate. By arranging an annular heating structure on the outside of the weld that can continuously keep warm during welding, the temperature change of the parent material around the weld during welding can be effectively controlled, the welding temperature gradient can be reduced, the stress state around the weld can be improved, the probability of cracks inside the weld can be reduced, the welding quality can be improved, and the product qualification rate can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the heating ring assembly in the present invention; Figure 3 It is a schematic diagram of the positional relationship between the present invention, the parts to be welded and the positioner.

[0017] The figure shows: DETAILED DESCRIPTION

[0018] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0019] The present invention discloses a welding heat treatment device and system for thin-walled parts of dissimilar metal shafts. On the basis of a traditional welding system, a heat treatment device that can continuously heat the weld during the welding process is added. The temperature change of the parent material around the weld during the welding process can be effectively controlled, the welding temperature gradient can be reduced, and the stress state around the weld can be improved, thereby reducing the probability of cracks inside the weld.

[0020] According to the welding heat treatment device for thin-walled parts of dissimilar metal shafts provided by the present invention, Figure 1 As shown, it includes a heating ring assembly, a fixing device 2 and a temperature control module 5, wherein the fixing device 2 is used to install the heating ring assembly and to adjust the position of the heating ring assembly; the heating ring assembly is sleeved on the outside of the weld 8 between the first shaft-type thin-walled part 7 and the second shaft-type thin-walled part 9 on the external positioner 6, and is used to heat the weld 8, wherein the first shaft-type thin-walled part 7 and the second shaft-type thin-walled part 9 are made of dissimilar metals; the temperature control module 5 is electrically connected to the heating ring assembly, and preferably, the annular heating module 3 in the heating ring assembly is connected to the temperature control digital display module, which ensures the temperature change gradient before and after welding.

[0021] Through the above-mentioned heat treatment device for thin-walled shaft parts made of dissimilar metals before and after welding, the temperature rise and fall rates of the weld can be reduced without interfering with the rotation of the original welding positioner, the internal stress state of the weld during welding can be improved, and the probability of internal crack formation in the weld can be reduced.

[0022] like Figure 2 As shown, the heating ring assembly includes an annular heating module 3 and a high-energy beam incident hole 1 arranged on the top of the annular heating module 3; the position of the high-energy beam incident hole 1 corresponds to the external laser, the annular heating module 3 is circumferentially sleeved on the outside of the weld 8, and the temperature control module 5 is connected to the annular heating module 3 and is used to control the temperature change gradient of the weld 8 before and after welding.

[0023] The annular heating module 3 is an induction heater. A gap is set between the inner surface of the annular heating module 3 and the first shaft-like thin-walled part 7 and the second shaft-like thin-walled part 9. A cavity is formed between the inner surface of the annular heating module 3 and the first shaft-like thin-walled part 7 and the second shaft-like thin-walled part 9, and the cavity is filled with an inert gas to form an inert gas protection chamber. The annular heating module 3 does not directly contact the welding workpiece, and the induction heating method does not interfere with the rotation of the parts.

[0024] Preferably, in order to be suitable for thin-walled shaft parts with different outer diameters, the bottom of the annular heating module 3 is provided with an opening variable diameter structure 4, and the opening variable diameter structure 4 includes a lug structure and an adjusting bolt; the bottom of the annular heating module 3 is provided with an opening, and the bottoms of both ends of the opening are provided with lug structures, and the middle of the lug structure is provided with a through hole, and the adjusting bolt passes through the through holes of the lug structures at both ends of the opening to adjust the opening of the bottom of the annular heating module 3. The opening variable diameter structure 4 of the annular heating module 3 adjusts the diameter of the ring through bolts of different lengths. If the diameter of the part increases, the opening of the variable diameter structure opening is increased by adjusting the bolt.

[0025] The fixing device 2 includes a fixing part and a hinge bracket. The fixing part is fixedly mounted on the external processing plane. One end of the hinge bracket is connected to the fixing part, and the other end of the hinge bracket is fixedly connected to the heating ring assembly. The fixing part is magnetically mounted on the external processing plane. The annular heating module 3 is connected to the hinge bracket, and the hinge bracket changes the position of the annular heating module 3 through the hinge structure.

[0026] Example This embodiment discloses a device for heat treatment of thin-walled parts such as soft magnetic alloy and stainless steel shafts before and after welding by high-energy beam welding. Figure 1-Figure 3 , which is described in further detail; Existing laser welding equipment mainly includes a laser, a gas protection device, a positioner and a welding work platform. If there is a need for heat treatment before and after welding, it is generally placed in a heat treatment furnace for heat treatment before clamping and after disassembly. In this embodiment: a set of heating ring assemblies that do not directly contact the parts are arranged around the weld of the welding workpiece, and the parts to be welded are heated directly on the positioner 6. After the welding is completed, there is no need to disassemble and assemble, and the temperature is cooled slowly on the positioner to ensure the timeliness of the heat treatment.

[0027] This embodiment improves the temperature change inside and around the weld by adding a welding heat treatment device, improves the stress state around the weld, reduces the probability of cracks inside the weld, improves welding quality, and increases product qualification rate. Figure 1 and Figure 2 The heat treatment device for pre-welding and post-welding parts of soft magnetic alloy-stainless steel shaft thin-walled parts for high-energy beam welding of this embodiment comprises a high-energy beam incident hole 1, a fixing device 2, an annular heating module 3, an opening variable diameter structure 4 and a digital display temperature control module 5; The high-energy beam entrance hole 1, the annular heating module 3 and the opening variable diameter structure 4 are integrated to form the heating ring assembly of the main structure of the equipment. The heating ring assembly is connected to the fixing device 2, and the hinge of the fixing device 2 realizes the full-position clamping of the heating ring assembly. The digital display temperature control module 5 controls the temperature of the heating ring assembly in real time to ensure the welding preheating temperature and slow cooling after welding. The high-energy beam entrance hole 1 determines the specific height according to the welding equipment, and forms an inert gas protection cavity in the cavity.

[0028] The heat treatment device for pre- and post-welding of thin-walled parts such as soft magnetic alloy-stainless steel shafts for high-energy beam welding in this embodiment can effectively improve the stress state around the weld, reduce the probability of internal cracks in the weld, improve welding quality, and increase product qualification rate.

[0029] According to the welding system of dissimilar metal shaft thin-walled parts provided by the present invention, Figure 3 As shown, it includes a laser, a gas protection device, a positioner 6, a welding work platform and the welding heat treatment device for dissimilar metal shaft thin-walled parts; the positioner 6 is installed on the welding work platform, and is used to clamp the first shaft thin-walled part 7 and the second shaft thin-walled part 9, the fixing device 2 is installed on the welding work platform and is located on one side of the positioner 6, the laser is installed on the top of the high-energy beam incident hole 1 of the heating ring assembly, and the heat treatment device has no contact with the positioner and the parts to be welded, and does not affect the rotation of the parts driven by the positioner.

[0030] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0031] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A welding heat treatment device for thin-walled parts of dissimilar metal shafts, characterized in that: It comprises a heating ring assembly, a fixing device (2) and a temperature control module (5), wherein the fixing device (2) is used for installing the heating ring assembly and for adjusting the position of the heating ring assembly; The heating ring assembly is sleeved on the outside of a weld (8) between a first shaft-like thin-walled part (7) and a second shaft-like thin-walled part (9) on an external positioner (6) and is used to heat the weld (8), wherein the first shaft-like thin-walled part (7) and the second shaft-like thin-walled part (9) are made of dissimilar metal materials; The temperature control module (5) is electrically connected to the heating ring assembly.

2. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 1 is characterized in that: The heating ring assembly comprises an annular heating module (3) and a high-energy beam incident hole (1) arranged on the top of the annular heating module (3); The position of the high-energy beam incident hole (1) corresponds to the external laser, the annular heating module (3) is circumferentially sleeved on the outside of the weld (8), and the temperature control module (5) is connected to the annular heating module (3) and is used to control the temperature change gradient of the weld (8) before and after welding.

3. The welding heat treatment device for thin-walled parts such as dissimilar metal shafts according to claim 1 is characterized in that: The annular heating module (3) is an induction heater.

4. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 1, characterized in that: A gap is provided between the inner surface of the annular heating module (3) and the first shaft-like thin-walled part (7) and the second shaft-like thin-walled part (9).

5. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 4 is characterized in that: A cavity is formed between the inner surface of the annular heating module (3) and the first shaft-like thin-walled part (7) and the second shaft-like thin-walled part (9), and the cavity is filled with an inert gas to form an inert gas protection cavity.

6. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 1, characterized in that: An opening diameter-changing structure (4) is provided at the bottom of the annular heating module (3), and the opening diameter-changing structure (4) comprises a support ear structure and an adjusting bolt; The bottom of the annular heating module (3) is provided with an opening, the bottoms of both ends of the opening are provided with ear structures, the middle of the ear structures is provided with a through hole, and the adjustment bolt passes through the through holes of the ear structures at both ends of the opening, so as to adjust the opening degree of the bottom opening of the annular heating module (3).

7. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 1 is characterized in that: The fixing device (2) comprises a fixing part and a hinge bracket, the fixing part is fixedly mounted on an external processing plane, one end of the hinge bracket is connected to the fixing part, and the other end of the hinge bracket is fixedly connected to the heating ring assembly.

8. The device for welding heat treatment of thin-walled parts such as dissimilar metal shafts according to claim 7, characterized in that: The fixing part is magnetically mounted on the external processing plane.

9. A welding system for thin-walled parts of dissimilar metal shafts, characterized in that: It comprises a laser, a gas protection device, a positioner (6), a welding work platform and the welding heat treatment device for thin-walled parts of dissimilar metal shafts as described in any one of claims 1 to 8; The positioner (6) is installed on the welding work platform and is used to clamp the first shaft-type thin-walled part (7) and the second shaft-type thin-walled part (9). The fixing device (2) is installed on the welding work platform and is located on one side of the positioner (6). The laser is installed on the top of the high-energy beam incident hole (1) of the heating ring assembly.

10. The welding system for thin-walled parts of dissimilar metal shafts according to claim 9, characterized in that: One of the first shaft-like thin-walled part (7) and the second shaft-like thin-walled part (9) is a stainless steel shaft-like thin-walled part, and the other of the first shaft-like thin-walled part (7) and the second shaft-like thin-walled part (9) is a soft magnetic alloy shaft-like thin-walled part.

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