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Method for sealing air removal and extraction pipe of composite sheath by hydraulic tongs

A technology of complex body and exhaust pipe, which is applied in the field of metal composite material processing, can solve the problems of low yield rate and air leakage of the jacket body, and achieve the effects of high yield rate, good quality of clamp seal, and stable process

Active Publication Date: 2014-07-02
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for hydraulically clamping and sealing the degassing and suction pipe of the composite body, which solves the problems of air leakage and low yield of the package that are easily caused by the existing clamp sealing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Vacuum electron beam welding is carried out between the degassing pipe and the upper cover of the composite package, and the vacuum degree of vacuum electron beam welding is 3×10 -5 MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, and then carry out vacuum electron beam welding on the upper and lower covers of the composite sheath and the composite sheath body, firstly the upper cover , The gap between the lower cover and the bag is welded at eight points, and the vacuum degree of the vacuum electron beam furnace chamber is 3×10 -5 MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, check the quality of solder joints, and conduct vacuum electron beam sealing welding after confirmation, welding current B=90mA, welding speed F=200° / min, focusing current Z=6000mA, to obtain the welded composite package; put the welded NbTi / Cu composite package with a diameter of Φ350mm and a length of 920mm into the degassing ...

Embodiment 2

[0035] Vacuum electron beam welding is carried out between the degassing pipe and the upper cover of the composite package, and the vacuum degree of vacuum electron beam welding is 6×10 -7 MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, and then carry out vacuum electron beam welding on the upper and lower covers of the composite sheath and the sheath respectively. The gap between the cover and the cover is welded at eight points, and the vacuum degree of the vacuum electron beam furnace chamber is 6×10 -7 MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, check the quality of solder joints, and conduct vacuum electron beam sealing welding after confirmation, welding current B=90mA, welding speed F=200° / min, focusing current Z=6000mA, to obtain the welded complex sheath; the welded Nb with a diameter of Φ120mm and a length of 240mm 3 The Al complex package is put into the degassing furnace, and the vacuum unit ...

Embodiment 3

[0037] Vacuum electron beam welding is performed on the degassing pipe and the upper cover of the composite package, and the vacuum degree of vacuum electron beam welding is 5×10 -6 MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, and then carry out vacuum electron beam welding on the upper and lower covers of the composite sheath and the sheath respectively. The gap between the cover and the jacket is welded at eight points, and the vacuum degree of the vacuum electron beam furnace chamber is 5×10 -6MPa, welding current B=80mA, welding speed F=300° / min, focusing current Z=6000mA, check the quality of solder joints, and conduct vacuum electron beam sealing welding after confirmation, welding current B=90mA, welding speed F=200° / min, focusing current Z=6000mA, to obtain the welded composite package; put the welded NbTi / Cu composite package with a diameter of Φ350mm and a length of 920mm into the degassing furnace, and vacuum the vacuum unit wit...

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Abstract

The invention discloses a method for sealing an air removal and extraction pipe of a composite sheath by hydraulic tongs. The method includes the following steps: performing vacuum electron beam welding on the air removal and extraction pipe and an upper cover of the composite sheath, and then subjecting the upper cover, a lower cover and a composite sheath body to vacuum electron beam welding; mounting the welded composite sheath in an air removal furnace, connecting a vacuum set with the air removal and extraction pipe of the sheath via a vacuum rubber hose, and sealing the joint part prior to heating and air removal; after air removal is finished, baking the extraction pipe to be reddish via an oxyacetylene torch; using flat hydraulic tongs for performing tongs pressure at the position baked to be red; then using hydraulic tongs with pressure grooves to perform tongs pressure in an flattened area again; using cutting nippers to cut through the composite sheath from the position of the topmost pressure groove; performing seal welding on the cut-through part via argon arc welding. The easily-caused problems of air leakage of the sheath body and low rate of finished products in an existing tongs sealing method are solved, and the method is stable in technologic process, good in tongs sealing quality and high in rate of finished products of composite rods and wires.

Description

technical field [0001] The invention belongs to the technical field of metal composite material processing, and in particular relates to a hydraulic clamp sealing method for a composite body covering a degassing and suction pipe. Background technique [0002] Metal composite rods / wires are generally stretched after secondary assembly of at least two types of metal materials. In its production process, it is first necessary to assemble one metal material into another metal material sheath and perform sealing welding, and then use vacuum equipment to degas the inside of the sheath through the exhaust pipe on the upper cover of the sheath to remove the air from the sheath. The air inside the casing is degassed and the suction pipe is clamped and sealed, and then the subsequent processing procedures such as extrusion and stretching are carried out. It should be noted that in order to enhance the degassing effect and remove the residual gas on the surface of the inner material, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 侯婧刘维涛朱秦岭严凌霄李永华周军昌李建峰刘建伟
Owner 西部超导材料科技股份有限公司
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