On-line multi-layer lap-joint laser filler wire fusion welding method used for top cover of business purpose vehicle
A technology of laser wire filling and car roof cover, which is applied in the direction of laser welding equipment, welding equipment, vehicle parts, etc., can solve problems such as welding pores, unstable welding process, welding defects, etc., to reduce thermal deformation and stress concentration, improve Welding stability, the effect of reducing welding gap requirements
Active Publication Date: 2014-12-10
WUHAN FARLEYLASERLAB CUTTING SYST ENG +1
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Problems solved by technology
Laser lap fillet welding and laser brazing have very high requirements on the weld (0.1-0.35mm), but the long-stroke thin plate of the car roof cannot be guaranteed, which may easily cause instability in the welding process or other welding defects; the car roof and Sealant is coated between the side walls, and laser lap welding seam penetration welding will cause defects such as welding pores; laser filler wire fusion welding is a new welding technology, which can better meet the welding technology of commercial vehicle roofs. Requirements, but higher requirements for welding process
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[0020] In order to clearly illustrate the technical characteristics of the present solution, the present invention will be further described below through specific implementation modes and in conjunction with the accompanying drawings.
[0021] figure 1 Shown is a schematic structural diagram of the device used in the laser wire-filling fusion welding process of the commercial vehicle roof of the present invention, which mainly includes a reciprocating rod 1, a laser door 2, a clamp 3, a right cylinder 4, a right robot 5, and a laser welding head 6, left robot 7, and dust collector 8.
[0022] The commercial vehicle roof adopted by the present invention has an online multi-layer overlapping laser wire-filled fusion welding process as follows: the body is sent to the initial positioning station through the reciprocating rod 1 and settled → body identification, feedback signal to the central control system → central control system After receiving the feedback signal, an instruc...
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The invention discloses an on-line multi-layer lap-joint laser filler wire fusion welding method for a top cover of a vehicle. A self-adaptive press wheel is adopted, and self-adaptive adjustment is performed according to surface states to meet accuracy requirements for welded seam gaps of laser welding; by the adoption of a multi-section welded seam simulation and optimization technology and a sectionalized correction technology, thermal deformation and stress concentration can be effectively reduced; a stable relationship between laser and welding wire positions is built to obtain good welding quality; a set of optimum technology parameters is obtained through optimizing a great number of technology experiments, and welding quality and welding efficiency are effectively improved.
Description
technical field [0001] The invention belongs to the field of laser processing, in particular to lap welding of commercial vehicle roof covers with large size, long stroke and thin plate parts. Background technique [0002] In the roof welding technology of modern commercial vehicles, well-known international brand automobile companies have adopted laser welding technology in large quantities to ensure product quality and technological advancement; The field of laser welding is still blank, which seriously affects the promotion and application of advanced laser manufacturing technology in China's automobile industry. [0003] The welding of the commercial vehicle roof is large-scale, long-stroke, thin-plate structural parts, and multi-segment curve welding. The basic technical indicators are: the quality of the weld seam needs to meet the requirements for the appearance and strength of the entire vehicle, meet the requirements for sealed connection of the entire vehicle, and ...
Claims
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IPC IPC(8): B23K26/244
CPCB23K26/244B23K2101/006
Inventor 邵新宇李斌段正澄付远兵程思寇瑞环阮小进陈志
Owner WUHAN FARLEYLASERLAB CUTTING SYST ENG