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A vacuum brazing method for workpiece joints based on strength compensation

A technology of strength compensation and brazing method, applied in the field of precision workpiece processing, can solve the problem of low strength of welding parts, and achieve the effect of ensuring strength, increasing service life and increasing strength

Active Publication Date: 2022-03-11
XIAN YUANHANG VACUUM BRAZING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a vacuum brazing method for workpiece joints based on strength compensation, which solves the problem of low strength of welding parts when directly brazing butt joints in the process of vacuum brazing

Method used

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  • A vacuum brazing method for workpiece joints based on strength compensation
  • A vacuum brazing method for workpiece joints based on strength compensation
  • A vacuum brazing method for workpiece joints based on strength compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A vacuum brazing method for workpiece joints based on strength compensation, such as figure 1 shown, including the following steps:

[0041] a. Assemble the two workpieces to be processed or repaired so that the contact surfaces of the two are flush; ensure that the misalignment distance error is within 0.05mm;

[0042] b. Determine the material of the compensation block according to the materials of the two workpieces;

[0043] When the two workpieces are of the same material, the compensation block shall be of the same material as the workpiece;

[0044] When the materials of the two workpieces are different, the material of the compensation block is determined according to the difference in the thermal expansion coefficients of the two workpieces: the difference in the expansion coefficients of the two workpieces is greater than 5×10 -6 / °C, the compensation block adopts a material with an expansion coefficient between the two workpieces; the difference between the...

Embodiment 2

[0059] in processing such as image 3In the cooling water chamber shown, since the first workpiece 11 is made of stainless steel and the second workpiece 12 is made of high-strength copper alloy, there are two joints between them, and both joints are butt joints. Add compensation block 13 and compensation block 14 respectively to vacuum weld the joints of the two workpieces; the specific steps are as follows:

[0060] a. Assemble the first workpiece 11 and the second workpiece 12, and use bolts and burrs for positioning, so that the contact surfaces of the two are flush; ensure that the misalignment distance error is within 0.05mm;

[0061] b. Determine the material of the compensation block according to the materials of the two workpieces;

[0062] Since the materials of the first workpiece 11 and the second workpiece 12 are different, and the difference between the coefficients of thermal expansion of the two workpieces is less than or equal to 5×10 -6 / °C, therefore, the ...

Embodiment 3

[0077] In maintenance such as Figure 4 In the shown device, there is a vacuum brazed annular butt joint between the third workpiece 21 and the fourth workpiece 22, wherein the material of the third workpiece 21 is stainless steel, and the material of the fourth workpiece 22 is a reinforced superalloy. Increase the compensation ring 23 to weld the joints of the two workpieces; the specific maintenance steps are as follows:

[0078] a. Assemble the third workpiece 21 and the fourth workpiece 22 so that the contact surfaces of the two are flush; ensure that the misalignment distance error is within 0.05mm;

[0079] b. Determine the material of the compensation ring 23 according to the materials of the two workpieces;

[0080] Since the materials of the third workpiece 21 and the fourth workpiece 22 are different, and the difference between the coefficients of thermal expansion of the two workpieces is less than or equal to 5×10 -6 / °C, therefore, the compensating ring 23 is ma...

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Abstract

The invention relates to the technical field of workpiece processing and maintenance, and discloses a vacuum brazing method for workpiece joints based on strength compensation, which includes the following steps: a. Assembling two workpieces to be processed or repaired so that their contact surfaces are flush; b. Determine the compensation block material according to the material of the two workpieces; c. Calculate the thickness B and length C of the compensation block according to the size of the two workpieces, and process the compensation block; d. Set up and compensate the joints of the two workpieces respectively Groove matching the size of the block; e. Apply solder to the bottom of the groove, then place the compensation block, position the compensation block with burrs, and then inject solder into the gap between the groove and the compensation block; f. Put the assembled compensation block The workpiece is vacuum brazed in a vacuum brazing furnace; e. Finishing the brazed workpiece to ensure that it reaches the standard size. The invention increases the brazing area by arranging a compensation block between the joints of two workpieces that need to be brazed, ensures the strength of the workpieces after processing and maintenance, and increases the service life of the workpieces.

Description

technical field [0001] The invention relates to the technical field of precision workpiece processing, in particular to a vacuum brazing method for workpiece joints based on strength compensation. Background technique [0002] Vacuum brazing is a brazing method performed in a vacuum atmosphere. The base metal does not melt during brazing, and the metallurgical combination between the molten brazing filler metal and the base metal is used to realize the connection between the base metals. Brazed joints can be divided into four categories: butt joints, lap joints, fillet joints and T-joints. [0003] In brazed connections, because the strength of the brazed seam is lower than that of the base metal, butt joints are generally not used, but due to structural limitations, a large number of brazed butt joints will be encountered. Based on the mechanism of vacuum brazing: relying on capillary action to realize the connection between brazing material and base metal, the strength o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/008B23K1/20
Inventor 任耀文康路路刘洋
Owner XIAN YUANHANG VACUUM BRAZING TECH
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