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Method for Diffusion Bonding Using a Membrane Removal Assist Device

An auxiliary device and diffusion connection technology, which is applied in the direction of drive devices, welding equipment, non-electric welding equipment, etc., can solve the problems of coarse grains of the base metal, reduced diffusion connection strength, and reduced strength, etc., to achieve simple process and ideal film removal effect , the effect of reducing requirements

Active Publication Date: 2015-10-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the passivation film on the surface of the material reduces the strength of the diffusion connection during the existing diffusion connection, and the temperature of the diffusion connection is increased or the connection time is prolonged, resulting in the coarse grains of the base material, the reduction of the strength and the generation of intermetallic compounds at the interface. , while providing a method for diffusion bonding using a membrane-removal assist device

Method used

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  • Method for Diffusion Bonding Using a Membrane Removal Assist Device
  • Method for Diffusion Bonding Using a Membrane Removal Assist Device

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specific Embodiment approach 1

[0018] Specific embodiment 1: In this embodiment, a film removal auxiliary device includes a clamping ring 1, a longitudinal rack 2, an upper gear 3, an oblique rack 4, a lower gear 5, a transverse rack 6, a cutter 7, and a cutter gear 8 and the cutter rack 9, the lower end of the longitudinal rack 2 is fixedly connected with the clamping ring 1, the upper gear 3 is fixed on the frame 10, the upper gear 3 meshes with the longitudinal rack 2 and the oblique rack 4, and the oblique The rack 4 is slidingly fixed on the frame 10, the oblique rack 4 meshes with the lower gear 5, and the lower gear 5 is arranged on the frame 10 through a rotating shaft, the lower gear 5 meshes with the transverse rack 6, and the transverse rack 6 slides Fixed on the frame 10, the disc-shaped cutter 7 is coaxially fixed with the cutter gear 8, the cutter 7 and the cutter gear 8 are installed on the shaft at the tail of the transverse rack 6, the cutter rack 9 is fixed on the frame 10, and the cutter r...

specific Embodiment approach 2

[0019] Embodiment 2: The method of diffusion connection using the membrane removal auxiliary device described in Embodiment 1 is specifically carried out in accordance with the following steps:

[0020] 1. Install the film removal auxiliary device described in Embodiment 1 between the upper pressure column 11 and the lower pressure column 12 in the vacuum welding furnace, and the clamping ring 1 is set on the lower end of the upper pressure column 11, and the two The materials to be connected are respectively clamped on the end surfaces of the upper pressure column 11 and the lower pressure column 12;

[0021] 2. Vacuum the vacuum welding furnace and control the vacuum degree to 8.0×10 -3 Pa~3.0×10 -5 Pa;

[0022] 3. Start the press of the vacuum welding furnace, the longitudinal rack 2 moves with the upper pressure column 11 of the press, drives the upper gear 3 to rotate, and drives the oblique rack 4 to move, and the oblique rack 4 drives the lower gear 5 to rotate, The ...

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment two is: in step two, the degree of vacuum is controlled to be 7.0×10 -3 Pa~4.0×10 -5 Pa. Others are the same as in the second embodiment.

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Abstract

The invention relates to a device and a method for diffusion connection, in particular to an auxiliary stripping device and a method for diffusion bonding by the aid of the auxiliary stripping device and aims to solve the problems that during current diffusion connection, diffusion connection strength is lowered by a passive film on the surface of a material, and large and low-strength base materials and generation of intermetallic compound on interfaces are caused since a diffusion connection temperature is increased or diffusion connection time is prolonged. The auxiliary stripping device comprises a clamp ring, a longitudinal rack, an upper gear, an inclined rack, a lower gear, a transverse rack, a cutter, a cutter gear and a cutter rack. The method includes: 1, clamping a material to be connected; 2, vacuuming; 3, stripping; 4, performing diffusion connection. The auxiliary stripping device and the method for diffusion bonding by the aid of the auxiliary stripping device have the advantages that requirements on connection faces are lowered, required temperature for diffusion connection is decreased obviously, connection time is shortened, diffusion connection efficiency is improved, influence on the base materials during welding is reduced, and welding strength is improved effectively.

Description

technical field [0001] The present invention relates to methods of diffusion bonding. Background technique [0002] Diffusion bonding is a connection method in which the materials to be connected are bonded together under a certain temperature and pressure. Only microscopic plastic deformation occurs on the connection surface of the workpiece, and the atoms at the interface diffuse each other to form a stable joint; the diffusion bonding method has high precision and small deformation. , can realize the connection of large-area plates and columns, so it has unique advantages in industrial production. However, the diffusion connection has strict requirements on the surface to be welded, and the surface to be welded should reach a certain degree of smoothness, and the influence of the surface passivation film on the diffusion connection must be overcome. Some materials are mechanically processed and corroded and cleaned before connection, and the surface will quickly form a p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/14B23K20/26
CPCB23D79/00B23K20/14B23K20/26B23Q5/04
Inventor 曹健李瑞陈海燕张丽霞亓均雷冯吉才
Owner HARBIN INST OF TECH