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Machining method used for steel 35 and 3Cr13 metal material welding rack

A technology of metal materials and processing methods, which is applied in the direction of machines/brackets, engine frames, supporting machines, etc., to achieve the effects of reducing errors, reducing processing deformation, and stabilizing dimensions

Active Publication Date: 2015-09-16
XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is: a kind of processing method that is used for steel 35 and 3Cr13 two kinds of metal material welding frame bodies, and this method technology is reasonable, reduces the deformation of parts by using the method of vibration aging; The accuracy problem, overcome the welding deformation, processing stress, etc., to ensure the processing accuracy and welding quality of the frame

Method used

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  • Machining method used for steel 35 and 3Cr13 metal material welding rack
  • Machining method used for steel 35 and 3Cr13 metal material welding rack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The specific steps of a processing method for welding frame bodies of steel 35 and 3Cr13 are as follows:

[0043] 1) Part blanking: blank steel 35 and 3Cr13 metal materials according to the specified size and requirements of the frame; figure 1 As shown, the frame base material 2 is steel 35, and the material of each insert 1 is stainless steel 3Cr13;

[0044] 2) Welding:

[0045] a) Welding method: manual arc welding welding method;

[0046] b) The selection of welding rods: J507 steel welding rod for welding between frame base materials, and Ao 302 welding rod for welding between frame base materials and insert materials; this ensures the uniformity of each weld structure and reduces alloy elements To avoid the cracks caused by the thinning, it not only ensures the weld structure and performance, but also ensures the welding quality of the product;

[0047] c) Welding process: first use the rigid fixing method to fix the welded parts on the welding platform, and then use symme...

Embodiment 2

[0067] On the basis of Example 1, the specific steps of the method are as follows:

[0068] 1. Blanking: Complete the blanking of the workpiece with the serial number shown in the drawing according to the drawing;

[0069] 2. Welding:

[0070] a. The manual arc welding method is adopted, welding can be carried out in all positions, and the welding speed can be easily controlled. It can be changed according to the size and length of the part and the weld to ensure the quality of the weld and the height of the weld;

[0071] b. Welding materials are selected from two types of welding rods containing high Cr A302 (A302) welding rod and structural steel welding rod J507. The frame base part is all steel 35 material, which is welded with structural steel welding rod J507, and the joint of the two materials is welded with stainless steel welding rod A302. This ensures the uniformity of the structure of each weld, reduces the thinning of alloy elements, and avoids the cracks caused by thinni...

Embodiment 3

[0090] Vibration aging is abbreviated as VSR (Vibratory Stress Relief), which uses a strictly controlled vibration energy to process metal workpieces to solve the dimensional changes and changes in load resistance caused by internal residual stress during and after the workpiece processing. problem. VSR has a significant effect on eliminating, reducing or homogenizing the residual stress in the metal workpiece, improving the resistance of the workpiece to dynamic and static load, deformation resistance, and stabilizing the dimensional accuracy.

[0091] In order to verify the effect of vibration aging, comparative tests were carried out in two states of stress relief by heat treatment and stress relief by vibration. 3 test pieces (160mm×350mm×10mm, wall thickness 2mm) were taken for each state. Use the same 2A12 (LY12) aluminum plate to blank, and then rough machining (leave 3mm allowance on one side), semi-finishing (leave 1mm allowance on one side), and finish machining. In or...

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Abstract

The invention relates to a machining method used for a steel 35 and 3Cr13 metal material welding rack. The machining method includes steps of 1) feeding parts; 2) welding, to be specifically, a) welding by a manual electric arc welding method, and b) selecting welding rods, selecting J507 steel welding rods for welding a frame base material, and selecting Ao302 welding rods for welding the combined portion of the frame base material and the insert material; c) welding according to the processes including firstly fixing welding parts on a welding platform by a rigid fixing method and welding the welding parts symmetrically, to be specifically, welding four corners of the welding parts symmetrically, cooling the parts to be welded and then welding inwards layer by layer, welding the first layer and welding the next layer after the parts to be welded are cooled; after welding, eliminating welding stress by vibration distressing; 3) thermally treating; 4) spraying sand; 5) detecting flaw; 6) scribing by a bench worker; 7) milling; 8) finely machining; 9) detecting and measuring. The machining method is reasonable in technique, and machining accuracy and welding quality of the welding rack of two metal materials are guaranteed.

Description

technical field [0001] The invention relates to a processing method, in particular to a processing method for welding frames of two metal materials, steel 35 and 3Cr13. It belongs to the field of mechanical processing. Background technique [0002] In the processing of large frame parts, it is usually welding and processing between the same materials, but with the development of science and technology, there are higher requirements for the weight, structural performance and precision of large frames. The welding process between different metal materials occurs in the welding frame. In the field of mechanical processing, the welding of steel 35 and 3Cr13 is rare, and it is only simple veneer splicing. There is no relevant report on the welding of complex frames. Due to the difference in mechanical properties and welding properties of steel 35 and 3Cr13, large deformation or cracks occur during the welding process, which cannot meet the design requirements. At the same time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00F16M1/00F16M11/00
Inventor 刘沛杨风军柴蓬林冯文星李海刚丁斌窦鑫红
Owner XIAN NORTH ELECTRO OPTIC TECH DEFENSE
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