Honeycomb structure diffusion brazing connection method

A technology of honeycomb structure and connection method, which is applied in the direction of welding equipment, manufacturing tools, auxiliary devices, etc., can solve the problems of difficult pressure control, poor surface accuracy, and low brazing strength in diffusion brazing process, and achieve the solution of process pressure control Difficult, improved mechanical properties, excellent weld strength

Active Publication Date: 2020-11-03
SHANGHAI SPACE PRECISION MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 o

Method used

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  • Honeycomb structure diffusion brazing connection method

Examples

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 magnetron sputtering method, and the honeycomb core and the upper and lower two skins are assembled. The height of the honeycomb core is larger than the surrounding skeleton. 0.01mm. After the assembly is put into the graphite mold, place a 100Kg briquetting block on the top of the graphite mold. After the gap between the skin and the skeleton of the workpiece is controlled at 0.3mm, 8 groups of C-type graphite clamps are evenly arranged around the tooling to clamp the graphite mold. , Place a back-type cushion block at the contact part between the clamp block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Place the assembled mold and workpiece in a vacuum furnace to evacuate to 10 -3 Start heating after Pa, keep warm for 10 minutes after the temperature ri...

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 magnetron sputtering method, and the honeycomb core and the upper and lower two skins are assembled. The height of the honeycomb core is larger than the surrounding skeleton. 0.02mm. After the assembly is put into the graphite mold, place a 200Kg compact on the top of the graphite mold. After the gap between the skin and the skeleton of the workpiece is controlled at 0.2mm, arrange 10 sets of C-type graphite clamps evenly around the tooling to clamp the graphite mold. , Place a back-type cushion block at the contact part between the clamp block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Place the assembled mold and workpiece in a vacuum furnace to evacuate to 10 -3 Start heating after Pa, keep warm for 15 minutes after the temperature rises to 40°C abov...

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 sets of skins are assembled. The height of the honeycomb core is larger than the surrounding skeleton. 0.03mm. After the assembly is put into the graphite mold, place a 250Kg compact on the top of the graphite mold. After the gap between the skin and the skeleton of the workpiece is controlled at 0.15mm, 10 groups of C-type graphite clamps are evenly arranged around the tooling to clamp the graphite mold. , Place a back-type cushion block at the contact part between the clamp block and the mold. The remaining gap between the spacer and the mold is filled with metal gaskets to a tight fit. Place the assembled mold and workpiece in a vacuum furnace to evacuate to 10 -3 Start heating after Pa, keep warm for 15 minutes after the temperature rises ...

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Abstract

The invention relates to a honeycomb structure diffusion brazing connection method, and belongs to the technical field of welding. The method comprises the steps that 1, a framework is arranged on thehorizontal circumferential side wall of a honeycomb core; 2, after a middle layer is preset on the upper surface of lower skin, the lower skin is attached to the bottom of the honeycomb core, after amiddle layer is preset on the lower surface of upper skin, the upper skin is attached to the top of the honeycomb core, and the honeycomb core is placed on a lower graphite mold, and an upper graphite mold is placed at the top; 3, a pressing block is preset at the top of the upper graphite mold, and a workpiece is formed; 4, n graphite clamping blocks are evenly arranged on the side wall of the workpiece to achieve clamping of the circumferential edge of the workpiece; and 5, a clamping tool is heated and cooled, and a honeycomb structure obtained after diffusion brazing is obtained. According to the method, the welding quality is higher, and the method is particularly suitable for high-temperature alloy honeycomb structure products with complex molded surfaces and high requirements for mechanical properties and forming precision.

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 puts 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 corrosion of the solder, while the welding of honeycomb components with complex profiles has problems such as difficult tooling pressure and poor forming accuracy after welding. Instantaneous liquid phase diffusion connection, also known as diffusion brazing, under the condition that the welding interface is in close contact, is heated above the eutectic temperature of the elements, and relies on the interdiffusion between material atoms to form a eutectic liquid phase at the contact interface, and the eutectic liquid phase is formed at the contact in...

Claims

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Application Information

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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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