Apparatus for automatically inspecting defects of PCB (printed circuit board)

Abstract

The invention discloses an apparatus for automatically inspecting defects of PCB (printed circuit board), comprising a frame, wherein a horizontally-arranged board feeding roller group, a board feeding compacting roller group, a position detecting switch, a light source detecting mechanism, a camera device, a board exit compacting roller group, a horizontally-arranged board exit roller group and a power device are arranged on the frame; the horizontally-arranged board feeding roller group is connected with a computer with a detecting and controlling program and is operated under the control of the computer; the position detecting switch is used for detecting the PCB; in use, the board feeding compacting roller group and the board exit compacting roller group act sequentially to send the PCB to be photographed gradually by the camera device, then the photographed images are spliced into an image by the computer, and the computer conducts comparison and operational analysis on the spliced image and a standard image prepared in advance so as to find the defect; furthermore, the outside of the defects are surrounded by lines of different colors and the serial number of the board is marked so that the board can be searched and repaired. The apparatus has a simple structure, smart concept, high automation, high inspection efficiency, high detection veracity, convenience in operationand low manufacturing cost, and is suitable for general popularization and application.

Description

technical field [0001] The invention relates to the technical field of product defect inspection machinery manufacturing, in particular to a fully automatic inspection device for PCB circuit board defects. Background technique [0002] At present, a large part of product defect inspection in the PCB circuit board production process relies on manual visual inspection, and the other part is inspected by machinery. When using mechanical inspection, most of them are compared with the correct circuit board image obtained by line scanning, and the computer automatically analyzes and finds out the inspection method of circuit board defects. Compared with manual inspection, the inspection accuracy is greatly improved. improve. However, the operator needs to put the PCB circuit board to be inspected on the inspection table, and after manually marking the detected defect position, manually take it out and enter the next repair process. This kind of mechanical inspection relies on ma...

AI Technical Summary

Problems solved by technology

However, the operator needs to put the PCB circuit board to be inspected on the inspection table, and manually mark the detected defect position, then manually take it out and enter the next repair process

This kind of mechanical inspection relies on manual operation, the degree of automation is low, the inspection speed is slow, and the operation is cumbersome

Moreover, this kind of machine uses line scanning to obtain the drawing image. The mechanical movement has high precision, high production cost, complex structure, and high maintenance technical requirements. It is difficult to popularize and use it in general small and medium-sized circuit board manufacturers. Compact, ingenious, capable of automatic inspection of PCB circuit board defects, high inspection accuracy, low manufacturing cost, and easy maintenance, the fully automatic inspection equipment for PCB circuit board defects is the idea of ​​the present invention

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