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Single-surface traceless welding method for stainless steel composite panel of elevator

A composite panel, single-sided traceless technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of insufficient bonding strength, stainless steel mirror surface damage, environmental pollution, etc., to save subsequent processing procedures , smooth surface, and the effect of improving the working environment

Active Publication Date: 2014-03-26
ZHEJIANG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One is resistance spot welding. This method has the disadvantages of visible weld scars on the front of the panel, large heat impact, and damage to the mirror surface of stainless steel.
Another method is glue bonding. The advantage is that the stainless steel wire drawing surface or mirror surface will not be damaged, but the strength of the glue bonding is not high enough, it is easy to age, the efficiency is extremely low, and it will cause environmental pollution and other problems.

Method used

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  • Single-surface traceless welding method for stainless steel composite panel of elevator
  • Single-surface traceless welding method for stainless steel composite panel of elevator
  • Single-surface traceless welding method for stainless steel composite panel of elevator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The welding method used is as figure 1 and figure 2 As shown, the 1.1mm thick Q235 hot-rolled steel plate is used; the stainless steel surface plate is 1.1mm thick AISI 304 brushed stainless steel panel; the length of the spacer = the length of the weld + 20mm, the purpose of being longer than the weld is to facilitate pulling out after welding , Spacer width = 20mm, spacer material is ANSI 304 stainless steel.

[0035] Predetermine the welding position before laser welding, and then clean the workpiece with acetone and rosin water; place two spacers with a thickness of 0.1mm on the stainless steel surface plate, and the two spacers are located on both sides of the place to be welded. Place a hot-rolled steel plate on the surface of the hot-rolled steel plate at 8mm, and install a roller device on the surface of the hot-rolled steel plate to be welded. The roller is provided with a spring that can apply force in the vertical direction. The focusing mirror is fixedly ...

Embodiment 3

[0043] Change the Q235 hot-rolled steel plate into Q235 cold-rolled steel plate, and the others are the same as in Embodiment 1. After welding, the cross-section of the weld was intercepted and chemically etched (with 10g FeCl 3 +30ml concentrated HCl+120ml aqueous solution as chemical etching agent), obtain sample, observe the morphology of this sample under optical microscope, such as image 3 (d) shown.

[0044] Depend on image 3 (a), 3(b), 3(c), and 3(d) it can be seen that when the thickness of the partition is too large (0.2mm), the depth of the weld on the metal surface plate is very shallow, and the connection strength is not enough; while When the thickness of the partition is too small (0.05mm), the thermal resistance effect is not obvious, the penetration depth is large, and the weld quality is poor. Only when the gap between plates is selected properly (0.1mm), defects such as air holes and cracks hardly appear in the obtained weld, and the quality of the weld ...

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Abstract

The invention discloses a single-surface traceless welding method for a stainless steel composite panel of an elevator, comprising the following steps of: (1) eliminating oil stains on respective surfaces to be welded of a cold (hot) rolled steel plate and a stainless steel surface plate; (2) placing the stainless steel surface plate on a work table, respectively placing a separation bar at two sides of a position to be welded and 5-10 mm away from the position to be welded, and then placing the cold (hot) rolled steel plate on the separation bar so that a gap of 0.08-0.12mm is reserved between the cold (hot) rolled steel plate and the stainless steel surface plate; (3) carrying out laser welding on the cold (hot) rolled steel plate and the stainless steel surface plate with a mixed gas of oxygen gas and inert gas as a protective gas to ensure that a welding seam penetrates through the cold (hot) rolled steel plate and the depth of the welding seam on the stainless steel surface plate is controlled to be 1 / 3-1 / 2 of the thickness of the stainless steel surface plate; and ensuring that the stainless steel surface plate, the cold (hot) rolled steel plate and the separation bar are clamped tightly in a welding process. The method provided by the invention has the characteristics of no trace on a single stainless steel panel surface, high welding seam quality and high strength of a combination structure.

Description

(1) Technical field [0001] The invention belongs to the field of metal material welding engineering, in particular to a single-sided traceless welding method for a metal panel, in particular to a single-sided traceless welding method for an elevator stainless steel composite panel. (2) Background technology [0002] An elevator stainless steel panel is a composite door panel formed by connecting a cold-rolled steel or hot-rolled steel base plate with an inner lining and a stainless steel plate on the surface. Single-sided traceless welding requires that there be no traces on one side of the plate to be welded (usually the back, that is, the brushed stainless steel surface or the mirror stainless steel surface) after welding. [0003] The welded structure formed by combining the cold-rolled steel plate with the stainless steel plate as the internal reinforcement structure can make full use of the respective advantages of the two kinds of steel, and improve the strength of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/20B23K26/60B23K26/14B23K26/21
Inventor 姚建华张群莉楼程华周明召
Owner ZHEJIANG UNIV OF TECH
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