Method for identifying and positioning flexible printed circuit (FPC) board plug

Abstract

The invention relates to a method for identifying and positioning a flexible printed circuit (FPC) board plug. The method comprises the following steps of: 1, calibrating at least four virtual identifier characteristic points on an image of the edge of an FPC board on a corresponding computer aided manufacturing (CAM) figure file and importing laser processing software to set the virtual identifier characteristic points as machine tool coordinate points; 2, flatly placing the FPC board with slightly large expansion ratio after manual detection on a platform and fixing the FPC board; 3, calibrating the camera resolution ratio of a positioning system by using a high-precision dimension standard sheet, wherein the resolution ratio remains unchanged when the height from a camera imaging plane to a platform plane is not changed; 4, aligning the camera with each identifier point of the FPC board real object obtained in the step 1 and capturing and calculating the actual coordinate point, corresponding to the platform, of each identifier point; 5, performing projective transformation on an FPC board coordinate system and a machine tool coordinate system, identifying and positioning the FPC board plug, and performing malformation correction compensation; and 6, adjusting laser cutting parameters acquired from cutting system software to be optimum and performing laser cutting processing on the FPC board and the plug appearance. The method is simple and convenient in operation and high in precision.

Description

technical field [0001] The invention relates to an identification and positioning method, in particular to an identification and positioning method for an FPC board plug. Background technique [0002] The increase in demand for portable products has driven the continuous development of circuit boards from single-sided to double-sided, multi-layer, flexible and rigid-flexible boards, and continues to develop in the direction of high precision, high density and high reliability. [0003] Flexible circuit board, that is, the base material of FPC board is copper, and it needs to be covered with a layer of cover film on the circuit. The material of the cover film is generally polyimide. The surface of the circuit board plays a protective role. In the later stage of FPC board production, the shape needs to be processed, and there is a row of plugs on the shape for connecting with other electronic products. The reliability of circuit board connection is stricter and higher for l...

AI Technical Summary

Problems solved by technology

[0005] In traditional production, the CCD positioning technology commonly used in laser cutting technology can only identify and position the cursor point on the FPC board. The cursor point is circular, cross-shaped or square, and it is easy to cause the plug cutting accuracy to fail to meet the requirements and the qualified rate of finished products to be low. Case

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