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Laser spot welding method for metal panel components

A metal panel, laser spot welding technology, used in laser welding equipment, metal processing equipment, welding equipment and other directions, to achieve the effect of small deformation, firm connection and smooth surface

Active Publication Date: 2015-07-08
NINGBO FOTILE KITCHEN WARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of upper layer material that can ensure smooth surface, small deformation, no oxidation and other traces after welding when the upper layer material is thicker, and the connection between the metal panels after welding is firm and reliable. Laser spot welding method for metal panel parts without breakdown

Method used

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  • Laser spot welding method for metal panel components
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Experimental program
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Effect test

Embodiment 1

[0035] In the laser spot welding method for metal panel parts provided in this embodiment, a PB series optical fiber transmission laser welding machine is first selected, and then the lower stainless steel panel with a thickness of 0.8mm and the upper stainless steel panel with a thickness of 1mm to be spot welded are pretreated. , the pretreatment mainly removes the stains on the stainless steel panel, attaches and fixes the upper stainless steel panel and the lower stainless steel panel to be welded, and finally adopts the laser spot welding method to carry out the laser electric welding step on the two-layer stainless steel panel parts to be welded, in which the laser spot The welding process parameters are:

[0036] Laser power: choose a parameter value from 2.0KW to 3.0KW, and the laser power in this embodiment is 2.8KW;

[0037] Spot welding time: choose a parameter value from 180 to 220ms, and the spot welding time in this embodiment is 200ms;

[0038] Welding speed: cho...

Embodiment 2

[0052] Different from Embodiment 1, the thickness of the lower stainless steel panel to be spot welded is 1mm, and the thickness of the upper stainless steel panel is 1.2mm, wherein the process parameters during laser spot welding are:

[0053] The laser power is 3.0KW;

[0054] The spot welding time is 215ms;

[0055] Welding speed: 15mm / s;

[0056] Lens focal length: the same choice of φ50×150mm;

[0057] Defocus amount: choose a parameter value from 0 to 1mm, and the defocus amount in this embodiment is 0.7mm;

[0058] Light output frequency: 6HZ;

[0059] The remaining parameters and fixtures are consistent with the first embodiment.

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Abstract

The invention relates to a laser spot welding method for metal panel components. The method comprises the following steps: selecting a laser welding machine; carrying out pre-treatment on a to-be-spot-welded lower layer metal panel with thickness of 0.8 mm to 1 mm and a to-be-spot-welded upper layer metal panel with thickness of 1 mm to 1.2 mm; carrying out fit fixation on the to-be-spot-welded lower layer metal panel and the to-be-spot-welded upper layer metal panel; carrying out laser electric welding on two layers of to-be-welded metal panels by adopting a laser spot welding manner. The laser spot welding method for metal panel components is characterized in that technological parameters of laser spot welding are as follows: laser power is 2.3 KW to 3.0 KW, spot welding time is 180 ms to 220 ms, welding speed is 12 mm / s to 16 mm / s, focal length of lens is Phi 50 *120 to Phi 50*150 mm, off-focus value: is 0 to 1 mm, and light extraction frequency is 6 Hz to 10 Hz; the laser power is enabled to rise to 100% of total power within the first 0.5 ms and kept for 8.5 ms to 9 ms, the laser spot welding work is completed, and then the laser power is fallen to zero from 100% of total power within 0.4 ms. The laser spot welding method for metal panel components has the advantages that the flat surface, small deformation, non-oxidation and no other traces of the welded metal panels can be guaranteed, and the welded metal panels are connected fixedly and reliably without punctures.

Description

technical field [0001] The invention relates to a laser spot welding method for metal panel components. Background technique [0002] Spot welding technology is currently the most important connection method for connecting thin plate lap joints. As a mature welding process, it is widely used in various industrial productions. There are many types of spot welding, including traditional resistance spot welding and arc spot welding, as well as laser spot welding, friction stir spot welding and composite spot welding, which have developed rapidly in recent years; laser spot welding is a new spot welding method , Compared with traditional resistance spot welding, it has its unique advantages, especially for some stainless steel thin plate welded structural parts with high performance requirements. Due to the use of laser as the heat source, the spot welding speed is fast, the precision is high, the heat input is small, and the deformation of the workpiece is small; the accessibi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/22B23K26/70B23K37/04
Inventor 叶群茅忠群诸永定李立波
Owner NINGBO FOTILE KITCHEN WARE CO LTD
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