Automatic detection system for air hole defects of laser tailor-welded blanks

Abstract

The invention discloses an automatic detection system for air hole defects of laser tailor-welded blanks, and belongs to the technical field of welding defect detection. The automatic detection system aims to solve the problems that in the prior art, existing equipment is poor in automatic detection capacity, low in detection efficiency and poor in detection accuracy, the situation of misinformation of the heads and the tails of the tailor-welded blanks occurs in misalignment welding, and the risk of missing detection exists. The automatic detection system comprises a transmitting device, a receiving device and a counting alarm. The transmitting device transmits high-intensity infrared light in a conical transmitting mode. The receiving device is arranged opposite to the transmitting device, the receiving device at least comprises receiving lenses which are arranged opposite to emergent light of the transmitting device, and the three receiving lenses are sequentially arranged in the length direction of a welding seam. The counting alarm comprises a counting module, a reset module and a sound control module. The three receiving lenses of the receiving device are electrically connected with the counting alarm, and when only the middle receiving lens is triggered, the sound control module of the counting alarm sends out an alarm signal.

Description

technical field [0001] The invention belongs to the technical field of welding defect detection, and in particular relates to an automatic detection system for pore defects of laser tailor welded blanks. Background technique [0002] At present, laser tailor welded blanks have been widely used in the automotive industry, such as longitudinal beams, skeletons, floors, door inner panels, side panels and bumpers of the car body. The quality of tailor-welded blanks is an important indicator to measure the safety performance of the car body. Any quality defects in tailor-welded blanks are absolutely not allowed to flow into the next process. [0003] At present, the typical quality defects that often occur in laser tailor welding: 1. The problem of porosity in the welding process; 2. The problem of the head and tail of the weld; 3. The problem of the laser weld being biased towards one side of the plate; 4. The weld is not welded see through the problem. [0004] Among them, th...

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Problems solved by technology

[0012] The purpose of the present invention is to propose an automatic detection system for pore defects in laser tailor welded blanks, which solves the existing equipment existing in the prior art with poor automatic detection capability, low detection efficiency, poor detection accuracy, and the head and tail of tailor welded blanks in wrong side welding. The occurrence of false positives and the risk of missed detection

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