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High-accuracy brazing method

A brazing method and high-precision technology, which is applied in the field of high-precision brazing and brazing environment, can solve problems such as difficult to handle multi-plate welding workpieces, welding quality cannot be guaranteed, and workpieces cannot be processed after welding.

Inactive Publication Date: 2018-10-19
SOUTHWESTERN INST OF PHYSICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such conventional brazing is difficult to handle multi-plate welded workpieces with long aspect ratios requiring high precision
At the same time, the existing brazing method cannot guarantee accurate positioning, the quality of the welding surface is poor, and the surface of the weld seam is rough and has welding spots, and the workpiece with a long aspect ratio cannot be processed after welding, and such workpieces with strict requirements on the weld seam cannot be processed. Guarantee welding quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] refer to figure 1 , figure 1 A flowchart of the welding method of this embodiment is shown.

[0048] A welding method, comprising the steps of:

[0049] In step 101, firstly, a bar-shaped groove is opened on the welding main part. According to the design information, multiple bar-shaped grooves can be opened on the same welding main part. These strip grooves can be maintained in parallel, vertical or other states according to actual needs. And preferably, the width of the bar-shaped groove is consistent everywhere, and the inside of the groove is smooth.

[0050] Step 102, pre-embed solder in the strip-shaped groove, and the thickness of the solder can be different according to the actual needs of different positions in the strip-shaped groove.

[0051] Preferably, before pre-embedding the solder, the size of the solder is trimmed so that the size of the solder matches the bar-shaped groove, and it is advisable not to slide after being embedded in the bar-shaped gro...

Embodiment 2

[0056] refer to figure 2 , in this embodiment, taking the welding of the sheet metal part 110 and the inserting plate 120 as an example, the sheet metal part 110 is the main welding part, and the sheet metal part 110 is a roughly rectangular plate. Three bar-shaped grooves 130, wherein, the extension directions of the three bar-shaped grooves 130 are parallel to each other, the bar-shaped grooves 130 run through the sheet metal part 110 along the length direction of the sheet metal part 110, and ensure that the inside of the bar-shaped grooves 130 is smooth, Same width.

[0057] In this embodiment, the strip groove 130 has a width of 2mm and a depth of 8mm. Moreover, the strip groove 130 is a strip groove of equal depth, and the depths of all places thereof are equal.

[0058] Then embed solder in the strip-shaped groove 130. In the present embodiment, the solder selects sheet solder, and at first the sheet solder is trimmed to a strip shape with a width slightly less than ...

Embodiment 3

[0063] refer to Figure 4 , in this embodiment, taking the welding of the sheet metal part 110 and the inserting plate 120 as an example, the sheet metal part 110 is the main welding part, and the sheet metal part 110 is a roughly rectangular plate. Two strip-shaped grooves 130 , wherein the extension directions of the two strip-shaped grooves 130 are parallel to each other, and the strip-shaped grooves 130 penetrate the sheet metal part 110 along the length direction of the sheet metal part 110 .

[0064] In this embodiment, the strip groove 130 has a width of 2mm and a depth of 8mm. Moreover, the strip groove 130 is a strip groove of equal depth, and the depths of all places thereof are equal.

[0065] Then embed solder in the strip-shaped groove 130. In the present embodiment, the solder selects sheet solder, and at first the sheet solder is trimmed to a strip shape with a width slightly less than 2mm, so that its size is the same as that of the strip. slots to match.

...

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Abstract

The invention provides a high-accuracy brazing method and belongs to the technical field of brazing. The high-accuracy brazing method comprises the following steps: forming grooves in a welding main part according to design information on the welding main part, embedding welding flux in the grooves, embedding welding subparts into the groove and propping the welding flux, heating and melting the welding flux. Through the high-accuracy brazing method, a manner of pre-forming the grooves and embedding the welding flux in the grooves is used for welding the welding main part with the welding subparts together after heating and melting the welding sheets; the welding subparts are embedded into the pre-formed grooves; the connecting and positioning accuracy can be effectively controlled duringpre-forming the strip-shaped grooves; angles R at the corners of welding lines can be controlled in R0.3; the welding lines are smooth and consistent; meanwhile, the welding flux is melted in the grooves and is low in possibility of overflowing and causing influence on the appearance of the welding surfaces.

Description

technical field [0001] The invention relates to the field of brazing technology, in particular to high-precision brazing, especially suitable for brazing environments that require high welding precision and strict requirements on weld corners. Background technique [0002] At present, the brazing technology requires only the strength of the weld, but there is no requirement for the R size of the corner and the consistency of the R angle. Although the cost of traditional brazing is relatively low, it relies on the technical techniques of the operator, the degree of precision is not high, and the welding quality is not easy to control. For example: the welding of the impeller of the aircraft engine is the exterior solder used in the brazing solder. The size of the R angle of such a weld or the consistency of the weld is not good. Even if the solder overflows, it can be processed after welding. Such conventional brazing is difficult to handle multi-plate welded workpieces wi...

Claims

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Application Information

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IPC IPC(8): B23K1/00
Inventor 梁军白兴宇肖体平
Owner SOUTHWESTERN INST OF PHYSICS