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Method and device for quickly inspecting welding performance of 35 # steel

A technology for testing equipment and welding performance, applied in welding equipment, measuring equipment, auxiliary equipment, etc., can solve the problems of high processing cost, long processing cycle, and low product qualification rate, so as to improve product qualification rate, reduce production cost, The effect of low technical requirements for workers

Active Publication Date: 2020-10-30
SHANXI NORTH MACHINE BUILDING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, in order to partially or completely solve the problems of low product qualification rate, high processing cost and long processing cycle caused by the direct application of 35# steel to production, and propose a rapid inspection method. The welding performance method of 35# steel and the corresponding inspection device are used for the cold cracking cracking performance of 35# steel spot welding test

Method used

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  • Method and device for quickly inspecting welding performance of 35 # steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for quickly testing the welding performance of 35# steel, including the following:

[0039] Take a piece of 35# steel A to be tested, and make 2 holes on it; the shape of the hole is square, for the convenience of processing, this example takes a rectangle, and the size is 400×200×20;

[0040] Another piece of 20CrMnSiA steel plate is taken as the restraining material, and its size can cover the two holes on the 35# steel 4 to be tested; the shape is not limited, and for the convenience of processing, this example is taken as 400×200×2;

[0041] placing said A on said restraint material so that the restraint material can completely cover the 2 holes on said A;

[0042] Take multiple points in one hole of A for spot welding; in this example, take 4 points, that is, take a point on each of the four sides of the rectangle, and spot weld a 3mm fillet weld respectively, so that the force on each point is even; of course , is not limited to this, it can also be othe...

Embodiment 2

[0047] A testing device for quickly testing the welding performance of 35# steel, such as figure 1 As shown, including outrigger 3, restraint material pad 2;

[0048] A stool-like structure is composed of outriggers 3 and restraint material pads 2;

[0049] The restraint material pad 2 is a plate made of 20CrMnSiA.

[0050] The supporting leg 3 shown in the figure is 2 plates, the actual production is not limited to this shape, it can also be 3 or 4 columns or other shapes, as long as the shape can be connected with the constraining material pad 2 to keep the constraining material pad 2 stable and horizontal That's it.

[0051] Preferably, the connection between the leg 3 and the restraint material pad 2 is welding.

[0052] Preferably, in order to facilitate the operation of the inspectors and improve the inspection efficiency, the inspection device further includes a limit block 5 for limiting the restraint material pad 2 and the 35# steel 4 to be inspected. In this exam...

Embodiment 3

[0059] The using method of the inspection device of rapid inspection 35# steel weldability described in embodiment 2, as figure 1 as shown,

[0060] Process the 35# steel 4 to be tested into a steel plate with 2 holes, whose length or width matches the distance between the two limit blocks 5; the specification of the 35# steel 4 to be tested in this example is 400×200× 20, open a square hole of 150×150 in the middle interval 40;

[0061]The 35# steel 4 to be tested is placed on the restraint material pad 2, and the position is between the two limit blocks 5;

[0062] In one hole of the 35# steel 4 to be tested, spot welding is carried out at the place where multiple points are connected with the restraint material; , to make it evenly stressed;

[0063] In the other hole of the 35# steel 4 to be inspected, spot welding is performed at the place where multiple points are connected to the restraint material; in this example, spot welding of 3mm in the upper, lower, left, and ...

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Abstract

The invention relates to a method for rapidly inspecting the welding performance of 35 # steel, and belongs to the technical field of welding. The method comprises the steps that a piece of 35 # steelA to be inspected is taken, and two holes are formed in the 35 # steel A; another 20CrMnSiA steel plate B which can cover the two holes in the A is taken, ; the A is placed on the B; multiple pointsare taken from one hole of the A to be subjected to spot welding with the hole B; multiple points are taken from the other hole of the A to be subjected to spot welding with the hole B; after the welding spots are completely cooled, whether there is a crack is detected, and if yes, the batch of 35 # steel where A is located is unqualified; otherwise, the batch is qualified. Compared with the priorart, the 20CrMnSiA steel plate and a to-be-inspected material are subjected to double-hole multi-point spot welding, whether the welding performance of the to-be-inspected material meets the production requirement or not is inspected, the method is simple and easy to implement, the technical requirement for workers is low, the inspected material is used for industrial production, the product percent of pass is greatly increased, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method and a device for quickly testing the welding performance of 35# steel, belonging to the field of welding technology. Background technique [0002] As a medium carbon steel, 35# steel is a material with little tendency to cold cracking. It is often used in steel structures. , cold cracking often occurs. In the field of construction machinery, 35# steel is used in various large and small parts, because 35# steel is fully used as a common steel. In the forming process of large and small parts, 35# steel It will be connected with Q235, Q345, 40Cr, 42CrMo, 20 steel, Q550, Q690, etc. by welding, but if there is a problem with the quality of 35# steel, it will cause weld cracking during welding, causing serious quality problems, resulting in Parts are scrapped, prolonging the processing cycle, reducing the pass rate of products, and increasing production costs. At present, there is a special need for a method that can deter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/207B23K37/00
CPCG01N33/207B23K37/00
Inventor 王树明李子青刘建伟温杰龙原星陈威先王素萍王平邢美栋
Owner SHANXI NORTH MACHINE BUILDING