A kind of honeycomb structure diffusion brazing connection method

A honeycomb structure and connection method technology, applied in welding equipment, manufacturing tools, auxiliary devices, etc., can solve the problems of difficult pressure control, poor profile accuracy, and low brazing strength in the diffusion brazing process, and achieve process pressure control. Difficulty, reduced corrosion, high welding quality

Active Publication Date: 2022-07-29
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to propose a honeycomb structure diffusion brazing connection method, which solves the problems of low direct brazing strength and large corrosion degree of the honeycomb structure, and at the same time solves the pressure of the diffusion brazing process. Difficult to control, poor surface accuracy, etc.

Method used

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  • A kind of honeycomb structure diffusion brazing connection method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] After the surface of the skin, skeleton and honeycomb core to be welded is polished and cleaned, a layer of 0.02mm thick intermediate layer is preset by the magnetron sputtering method, and the honeycomb core and the upper and lower two sets of skins are assembled. The height of the honeycomb core is larger than that of the surrounding skeleton. 0.01mm. After the assembly parts are put into the graphite mold, first place a 100Kg pressure block above the graphite mold. After the gap between the workpiece skin and the skeleton is controlled at 0.3mm, 8 groups of C-type graphite clamp blocks are evenly arranged around the tooling to clamp the graphite mold. , and place the return pad at the contact part between the clamping block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Put the assembled mold and workpiece in a vacuum furnace and vacuum to 10 -3 After the temperature rises to 30°C above the melting point...

Embodiment 2

[0041] After the surface of the skin, skeleton and honeycomb core to be welded is polished and cleaned, a layer of 0.03mm thick intermediate layer is preset by the magnetron sputtering method, and the honeycomb core and the upper and lower two sets of skins are assembled. The height of the honeycomb core is larger than that of the surrounding skeleton. 0.02mm. After the assembly parts are put into the graphite mold, first place a 200Kg pressure block above the graphite mold. After the gap between the workpiece skin and the skeleton is controlled at 0.2mm, 10 sets of C-type graphite clamping blocks are evenly arranged around the tooling to clamp the graphite mold. , and place the return pad at the contact part between the clamping block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Put the assembled mold and workpiece in a vacuum furnace and vacuum to 10 -3 After Pa, the heating is started. When the temperature ri...

Embodiment 3

[0043] After the surface of the skin, skeleton and honeycomb core to be welded is polished and cleaned, a layer of 0.04mm thick intermediate layer is preset by magnetron sputtering method, and the honeycomb core and the upper and lower two sets of skins are assembled. The height of the honeycomb core is larger than the surrounding skeleton. 0.03mm. After the assembly parts are put into the graphite mold, first place a 250Kg pressure block above the graphite mold. After the gap between the workpiece skin and the skeleton is controlled at 0.15mm, 10 sets of C-type graphite clamping blocks are evenly arranged around the tooling to clamp the graphite mold. , and place the return pad at the contact part between the clamping block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Put the assembled mold and workpiece in a vacuum furnace and vacuum to 10 -3 After Pa, the heating is started. When the temperature rises to 40°C...

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Abstract

The invention relates to a honeycomb structure diffusion brazing connection method, which belongs to the technical field of welding; in step 1, a skeleton is arranged at the horizontal circumferential side wall of a honeycomb core; in step 2, an intermediate layer is preset on the upper surface of a lower skin , attach the lower skin to the bottom of the honeycomb core; after pre-setting an intermediate layer on the lower surface of the upper skin, attach the upper skin to the top of the honeycomb core; place it on the lower graphite mold and place it on top upper graphite mold; step 3, presetting a pressing block on the top of the upper graphite mold; forming a workpiece; step 4, evenly disposing n graphite clamping blocks on the side wall of the workpiece; realizing the clamping of the circumferential edge of the workpiece; step 5. Heat and cool the clamping tool to obtain the honeycomb structure after diffusion brazing; the welding quality of the invention is higher, and it is especially suitable for the high temperature alloy honeycomb structure with complex profile and high requirements on mechanical properties and forming accuracy product.

Description

technical field [0001] The invention belongs to the technical field of welding, and relates to a honeycomb structure diffusion brazing connection method. Background technique [0002] With the development of the aerospace industry, the structure has put forward higher requirements for light weight and functionality. The honeycomb components obtained by the traditional brazing method have problems such as low weld strength and easy dissolution of the solder, and the welding of honeycomb components with complex profiles has problems such as difficulty in applying tooling pressure and poor forming accuracy after welding. Instantaneous liquid phase diffusion connection, also known as diffusion brazing, is heated to above the eutectic temperature of the elements under the condition that the welding interface is in close contact. The crystalline liquid phase is used as a filling material, which wets and spreads over the entire joint gap under the action of pressure, and gradually...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K3/08
CPCB23K1/008B23K3/08
Inventor 陈旭马平义韩兴刘海建彭赫力戴铮
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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