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Procession welding method for superfine stainless steel mesh

A technology of precision welding and stainless steel screen, used in welding equipment, plasma welding equipment, metal processing equipment and other directions, can solve problems such as unfavorable industrial promotion, low production efficiency, difficult cleaning, etc., to achieve industrial promotion, good welding effect, welding reliable results

Inactive Publication Date: 2010-07-14
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the welding method, there are the following technical difficulties in fusion welding ultra-fine stainless steel screen mesh: (1) the wire diameter on the screen is very small, and it is very easy to overheat during welding, so that the mesh wire is burnt; (2) the screen mesh is made of Made of stainless steel filaments, the cross-section of the screen is an alternating layered structure of single-layer wire-double-layer wire, which is easy to cause cleaning difficulties and discontinuous melting and wetting between layers; (3) due to the screen material Functional requirements, the new aperture formed in the weld area cannot be larger than the aperture of the screen holes in other areas; (4) The solder joints are discontinuous
[0006] In addition, there are two problems in the fusion welding of ultra-fine stainless steel mesh: (1) the alignment of the welding seam and the welding torch
This stainless steel wire mesh micro-beam plasma arc welding method is essentially the spot welding of micro-beam plasma arc; it is also limited to manual operation, and the degree of automation is low. Therefore, the production efficiency is low and it is not conducive to industrial promotion.

Method used

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  • Procession welding method for superfine stainless steel mesh
  • Procession welding method for superfine stainless steel mesh
  • Procession welding method for superfine stainless steel mesh

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] combine Figure 2 to Figure 6 A total of 5 pictures are used for illustration.

[0052] Explanation of symbols in the figure: 101. Nozzle; 103. Tungsten rod; 106. Pressing plate; 107. Pressing plate; 110. Backing plate; 110-1. A. Tungsten rod diameter; B. Nozzle aperture; C. Gap distance at the lower part of the pressure plate; D. Tungsten rod shrinkage; E. Torch height; F. Protrusion length; G. Continuous welding forward direction.

[0053] A precision welding method for ultra-fine stainless steel screens in this embodiment, the screens are braided by ultra-fine stainless steel wires, and the diameter of the ultra-fine stainless steel wires is Φ0.20mm, and the precision welding is two Block screens are butt welded. Follow the steps below in sequence.

[0054] The first step: the preparatory work step.

[0055] The following description of the first step can be found in image 3 , Figure 4 to understand.

[0056] First, design according to the needs of the actua...

Embodiment 2

[0066] In the process of moving the welding torch from one end to the other, the position of the welding torch should be moved forward, that is, the welding machine and the welding torch should be in the welding working state in advance. In the working state, when the welding torch reaches one end of the joint, the welding machine and the welding torch have entered a stable and reliable working state, so that the front end of the screen at the joint can have a good and stable welding effect; if the aforementioned operation measures are not taken, Instead, the welding machine and the welding torch are turned on when the welding torch is located at one end of the butt joint, which may cause the problems of poor welding effect and unstable quality at the front end of the butt joint of the screen. In the same way, when the welding torch reaches the other end, the welding machine and welding torch should not stop working immediately, but should keep the welding machine and welding t...

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Abstract

The invention relates to the technical field of welding, and discloses a procession welding method for a superfine stainless steel mesh. In order to solve the problem of incapability of rapid welding in the prior art, the invention provides the following technical scheme: the method is characterized by comprising the steps: a, preparation work; b, mesh alignment and compression; c, one-time successive welding from one end of a joint to the other end thereof by utilizing a microbeam plasma arc welding machine, wherein, the diameter of a tungsten rod is 0.8-1.2 mm, the aperture of a nozzle is 0.8-1.2 mm, the neck-in amount of the tungsten rod is 1.8-2.2 mm, the height of a welding torch is 2.8-3.2 mm, the current of DC welding is 1.9-2.1 A, the welding speed is 10.0-13 mm / s, the shielding gas flow is 3.0-4.0 L / min, and the ionic gas flow is 0.25-0.35 L / min. The invention has the beneficial effects of realizing automatic rapid welding and high welding line strength; in addition, normal screenability is maintained.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a precision welding method for ultrafine stainless steel mesh. Background technique [0002] Ultra-fine stainless steel mesh is usually woven from ultra-fine stainless steel wires. The ultra-fine stainless steel screen has the characteristics of wear resistance, heat resistance, acid resistance and corrosion resistance, and can screen various fine particle raw materials. Due to these properties, it is widely used in many fields such as mining, chemical industry, food industry and pharmaceutical industry. In many occasions, stainless steel wire mesh needs to be welded before use. If the wire diameter of the screen is smaller and the mesh number is larger, the welding difficulty will be higher. [0003] In the production and production of ultra-fine stainless steel screens, according to the specific requirements of use, it is often necessary to weld them in order to connect two...

Claims

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Application Information

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IPC IPC(8): B23K10/02
Inventor 何建萍向锋王付鑫
Owner SHANGHAI UNIV OF ENG SCI
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