A method and device for quickly screening size defects of metal parts

Abstract

The invention discloses a metal piece size defect rapid screening method and device. According to the method, existence of the size defects is visually judged by light-up of indicating lamps through construction of a circuit loop between a metal piece and detection metal floating contacts, the indicating lamps, a power supply and a detection platform by utilizing conductivity of the metal piece. The size defects include a flatness defect and a slot / hole height size defect. The device comprises a pedestal, a conductive metal platform, a flatness detection metal floating contact, a height detection metal floating contact, a monochromatic indicating lamp, a bicolor indicating lamp, springs, conductive metal sheets, a position-limiting metal contact and the power supply. With application of the method and the device, the metal piece to be detected is arranged in a detection area, and then the flatness and height size defects of the metal piece to be detected can be visually judged by observing the change of the color of the indicating lamps so that rapid screening of the size defects of mass metal pieces can be realized.

Description

Technical field [0001] The invention relates to a method and a device for rapidly screening dimensional defects of metal parts, and belongs to the technical field of quality control. Background technique [0002] Because metal parts are processed through multiple forming processes, it is easy to form outward protrusions or inward depressions and other deformations during processing, which will affect the assembly performance and use performance of the metal parts. Therefore, in order to To avoid affecting the assembly performance and use performance of the metal parts, it is necessary to screen the defects in the flatness, grooves, holes and other height dimensions of the processed metal parts, and reject defective products in time. [0003] At present, the following methods are usually used to realize the size detection of metal parts: [0004] 1. The basic principle of the three-dimensional measuring instrument is to obtain the discrete spatial point position of the measured geome...

AI Technical Summary

Problems solved by technology

Although the accuracy of this detection method is very high, it has defects such as low detection efficiency and high detection cost. It is not suitable for batch inspection, but only for random inspection, so that it cannot meet the quality inspection requirements for batch production of high-precision metal parts;

[0005] 2. Laser sensor detection is used to detect various points of the product through multiple movements of the probe assembly. This detection method not only has defects such as low efficiency and unadjustable detection accuracy, but also has complex structure, high cost, insufficient stability, and easy Affected by environmental factors, this detection method is not suitable for the quality inspection requirements of mass production of high-precision metal parts

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