Defective workpiece sorting method and system for cutting-off machine

Abstract

The invention provides a defective workpiece sorting method and system for the cutting-off machine. According to the defective workpiece sorting method, the conveying speed of a conveying belt is accurately obtained through pulse signals and a proximity switch, the real-time conveying speed is obtained, and the problem that the detection precision is reduced due to fluctuation of the conveying speed in the actual conveying process can be solved; a workpiece gap length is accurately obtained through the conveying speed and the pulse signal, and the problem that the result precision is reduced due to fluctuation of the conveying speed is further avoided; the first sorting delay time is obtained through the distance between a cut-off position and a detection position, the workpiece gap length and the conveying speed, it can be guaranteed that the defective workpieces are accurately sorted out through the sorting executing mechanism by removing the workpiece gap length, and the defective workpieces cannot be wrongly selected or missed; and in addition, the acquisition of the first pulse segment is optimized, so that the problem of inaccurate data caused by fluctuation of the pulse signals is eliminated. According to the sorting system, defective workpieces can be automatically and accurately screened, and the yield is increased.

Description

technical field [0001] The invention relates to the technical field of cutting machines, in particular to a method and system for sorting defective workpieces of cutting machines. Background technique [0002] In the production of flat aluminum tubes (commonly known as harmonica tubes), the last process is to complete straightening, shaping, and cutting on the cutting machine; it is also equipped with defect detection, size detection and other means to screen out the "defect root". In the equipment equipped with detection means, there is currently no good screening means to sort out "defective roots". Defect roots refer to artifacts that do not conform to requirements. [0003] On the existing cutting machine, after the defect is detected, the workpiece is cut, and then the cut workpiece is transported to the packaging table through the conveyor belt. Since the defect detection has gone through two processes of cutting and conveying, the workpiece arrives at the packaging t...

AI Technical Summary

Problems solved by technology

[0004] However, removing defect detection and sorting requires manual selection, which is time-consuming and labor-intensive and may cause omissions, and often the cutting machine also needs to install encoders and marking devices, which increases equipment cost and volume

[0005] Furthermore, installing a defect detector on the cutting machine can detect defects on the workpiece, but often the defect will be cut off after moving away from the defect detector, transported after cutting, and the defective workpiece will be thrown out by a sorting mechanism. , in these processes, it is impossible to accurately judge which workpiece the defect is located on after being cut off, so that it is impossible to accurately judge when the defective workpiece leaves the cutting part, and it is impossible to accurately judge the specific position of the defective workpiece. , making it difficult to screen out defective workpieces; misscreening will lead to waste of qualified workpieces, increase costs, and reduce production yield

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