Search

CN-121988852-A - Diffusion connection process for aviation parts

CN121988852ACN 121988852 ACN121988852 ACN 121988852ACN-121988852-A

Abstract

The invention discloses a diffusion connection process for aviation parts, which belongs to the technical field of diffusion welding and comprises a hot isostatic pressing machine arranged in a vacuum furnace, wherein a machine body support is arranged in the hot isostatic pressing machine, support arm plates are arranged on two sides of a mode switching table, the support arm plates are connected with side pressure clamping plates through synchronous displacement assemblies, displacement switching pieces for directly clamping the side surfaces of base materials are arranged on the side pressure clamping plates, and the machine body support is provided with an optical detection camera for monitoring the time of the surfaces of the installed base materials. According to the invention, the intermediate body can be directly and independently heated by integrating the resistance heating plate on the intermediate body clamping plate, so that synchronous heating and temperature consistency of the intermediate body and the base material are realized, thermal stress generated by temperature difference is fundamentally avoided, joint performance degradation and deformation are prevented, stability and reliability of joint metallurgical quality are ensured, and the problems of delayed heating and non-uniformity of the intermediate body by means of base material heat conduction heating in the traditional process are solved.

Inventors

  • ZHANG BANGQING
  • XUE JIANHUI
  • QU ZHI

Assignees

  • 深圳市钧诚精密制造有限公司

Dates

Publication Date
20260508
Application Date
20251218

Claims (8)

  1. 1. The diffusion connection process for the aviation parts comprises a hot isostatic press (1) arranged in a vacuum furnace, wherein upper and lower hot pressing heads (2) for applying pressure to a base metal are arranged at the upper end and the lower end of the hot isostatic press (1), and the diffusion connection process is characterized in that a machine body support (3) is arranged in the hot isostatic press (1), a mode switching table (4) is rotatably arranged on the machine body support (3), support arm plates (6) are arranged at two sides of the mode switching table (4), the support arm plates (6) are connected with side pressure clamping plates (7) through synchronous displacement assemblies, displacement switching pieces for directly clamping the side surfaces of the base metal are arranged on the side pressure clamping plates (7), and optical detection cameras (8) are arranged at the upper end and the lower end of the machine body support (3) and used for monitoring the time of the surface of the installed base metal; The mode switching table (4) is connected with two opposite intermediate clamping plates (9) through symmetrical mutual pressing devices, heating grooves (10) for adapting to intermediate bodies are formed in opposite surfaces of the intermediate clamping plates (9), and heating devices are arranged on the intermediate clamping plates (9) and used for heating the intermediate bodies.
  2. 2. The diffusion bonding process for aviation components according to claim 1, wherein a rotary driving ring (5) is rotatably arranged on the outer side wall of the body support (3), and the mode switching table (4) is fixedly arranged on the rotary driving ring (5) and is used for switching a diffusion welding mode.
  3. 3. The diffusion bonding process for aviation components according to claim 1, wherein the synchronous displacement assembly comprises a rectangular through hole formed in the support arm plate (6), a synchronous driving seat (11) is slidably arranged in the rectangular through hole, and the synchronous driving seat (11) is connected with the support arm plate (6) through a clamping pneumatic push rod (12).
  4. 4. The diffusion connection process for aviation components according to claim 1, wherein the displacement switching piece comprises two sliding installation seats (13) sleeved on the side pressure clamping plates (7), the sliding installation seats (13) are locked with the side pressure clamping plates (7) in a sliding mode through positioning pieces, Z-shaped support plates (14) are oppositely arranged on the back portions of the two sliding installation seats (13), and interval adjusting cylinders (15) connected with the Z-shaped support plates (14) are arranged on the upper surface and the lower surface of the synchronous driving seat (11).
  5. 5. The diffusion bonding process for aviation components according to claim 4, wherein the positioning piece comprises a positioning vertical groove (16) formed in the side pressure clamping plate (7), and the sliding mounting seat (13) is sleeved on the intermediate clamping plate (9) and is in sliding connection with the positioning vertical groove (16) through a positioning block (17).
  6. 6. The diffusion connection process for aviation components according to claim 1, characterized in that the symmetrical mutual pressing device comprises a clamping plate movable cavity (19) arranged on a mode switching table (4), and intermediate clamping cylinders (18) are arranged on the upper inner wall and the lower inner wall of the mode switching table (4).
  7. 7. A diffusion bonding process for aerospace components according to claim 6, wherein two intermediate clamps (9) are located in the clamp moving chamber (19) and slidably connected to the inner wall of the clamp moving chamber (19) by means of vertical guides (20), and the output end of the intermediate clamping cylinder (18) extends through the clamp moving chamber (19) and is connected to the intermediate clamps (9).
  8. 8. A diffusion bonding process for aircraft parts according to claim 1, wherein the heating means comprise a temperature-controllable resistive heating plate (21) mounted on an intermediate clamping plate (9), the resistive heating plate (21) heating the intermediate located in the heating tank (10) directly.

Description

Diffusion connection process for aviation parts Technical Field The invention relates to the technical field of diffusion welding, in particular to a diffusion connection process for aviation parts. Background Diffusion welding is an advanced solid state joining technique which plays a critical role in the aerospace manufacturing industry, particularly in the production of high performance, structurally complex parts, and aerospace materials are mostly high performance alloys which, if metallurgically mismatched, can directly lead to dramatic degradation of joint performance even lower than the parent metal, constituting a serious threat to the safety of the whole part, which is known in the industry as metallurgical compatibility, and in order to avoid the occurrence of undesirable intermetallic compounds, intermediate bodies are often added in the middle of the parent metal to inhibit brittle phase formation, such as titanium alloys and stainless steel, with the use of intermediate layer materials as "buffers" to prevent direct contact of titanium with iron. When a diffusion welding machine (vacuum hot pressing furnace) at present is used for performing diffusion welding, a base material is usually heated through an upper pressing head and a lower pressing head, wherein an intermediate body positioned between two base materials is heated after heat is conducted through the base materials, so that the heating uniformity and heating time of the intermediate body are asynchronous with those of the base materials at two ends, the welding efficiency is influenced, and meanwhile, the final welding effect is influenced due to thermal stress caused by temperature difference. Disclosure of Invention The invention aims to solve the problems that the temperature rising uniformity and the temperature rising time of the traditional intermediate are asynchronous with base materials at two ends, the welding efficiency is influenced, and the final welding effect is influenced due to thermal stress caused by temperature difference. In order to achieve the above purpose, the present invention adopts the following technical scheme: The diffusion connection process for the aviation parts comprises a hot isostatic press arranged in a vacuum furnace, wherein upper and lower hot pressing heads for applying pressure to a base metal are arranged at the upper end and the lower end of the hot isostatic press, a machine body support is arranged in the hot isostatic press, a mode switching table is rotatably arranged on the machine body support, support arm plates are arranged at two sides of the mode switching table, the support arm plates are connected with side pressure clamping plates through synchronous displacement assemblies, displacement switching pieces for directly clamping the side surfaces of the base metal are arranged on the side pressure clamping plates, and optical detection cameras are arranged at the upper end and the lower end of the machine body support and used for monitoring the time of the surface of the installed base metal; The mode switching table is connected with two opposite intermediate clamping plates through symmetrical mutual pressing devices, heating grooves for adapting to intermediate bodies are formed in opposite surfaces of the intermediate clamping plates, and heating devices are arranged on the intermediate clamping plates and used for heating the intermediate bodies. Preferably, the outer side wall of the machine body support is rotatably provided with a rotary driving ring, and the mode switching table is fixedly arranged on the rotary driving ring and used for switching the diffusion welding mode. As a preferable scheme, the synchronous displacement assembly comprises a rectangular through hole formed in the support arm plate, a synchronous driving seat is slidably arranged in the rectangular through hole, and the synchronous driving seat is connected with the support arm plate through a clamping pneumatic push rod. As the preferred scheme, the displacement switching piece is including the cover two slip mount pad of establishing on the side pressure splint, the slip mount pad passes through setting element and side pressure splint slip locking, two slip mount pad back is provided with "Z" shape extension board relatively, synchronous drive seat upper and lower surface all is provided with the interval adjustment cylinder that is connected with "Z" shape extension board. As the preferable scheme, the locating piece is including seting up the location vertical groove on the side pressure splint, the slip mount seat cover is established on the midbody splint, and through locating piece and location vertical groove sliding connection. As a preferred scheme, the symmetrical mutual pressing device comprises a clamping plate movable cavity arranged on a mode switching table, wherein intermediate clamping cylinders are arranged on the upper inner wall and the lower inner wall of the mode switching