Automobile wheel hub screw hole recognition method based on machine vision and shielding method and system

Abstract

The invention discloses an automobile wheel hub screw hole recognition method based on machine vision and a shielding method and system. The recognition method comprises the steps that a wheel hub image of a wheel hub to be detected is collected; the wheel hub image is preprocessed, edge information is extracted, screening is performed through the roundness characteristic, and the hole center coordinate of a PCD hole is primarily determined; a hole center coordinate value of the PCD hole is finally determined according to the distribution characteristic of the PCD hole in the wheel hub; the image coordinate is converted into the space coordinate, a two-dimensional manipulator is driven to drive a shielding spraying placer to move to the position over the PCD hole, shielding spraying balls are placed one by one, and automatic control over paint shielding spraying of automobile wheel hubs of various specifications is achieved. According to the recognition method, the wheel hub PCD hole positioning precision is high, automatic screw hole shielding can be achieved, the labor cost is reduced, and the automation and intelligentization degree of the production process is improved.

Description

technical field [0001] The invention belongs to the technical field of product surface detection and manipulator control, and in particular relates to a machine vision-based method for identifying screw holes in automobile wheel hubs, and a method and system for automatically covering the screw holes. Background technique [0002] With the rapid development of my country's automobile industry, as the key upstream parts of automobiles, the demand for automobile wheels is increasing day by day. The production scale of wheel enterprises is expanding rapidly. Each wheel production line requires a lot of manpower. The traditional production method relying on manpower can no longer To adapt to the requirements of modern wheel hub production, and the diversification of wheel hub models also puts forward higher requirements for the automatic production level of wheel hub manufacturers. [0003] In the wheel painting production line, a wheel needs to be painted three times. In order t...

AI Technical Summary

Problems solved by technology

Due to the gradual diversification of wheel hub models, the labor intensity of workers is high. Although the needs of testing are met to a certain extent, due to the high speed of the wheel hub production line, the large number of hub models, and the small differences between the hubs, two problems have been brought about: 1. One is that the working environment of workers is monotonous and boring, which will cause visual fatigue and error-prone for a long time; the other is that the degree of automation of manual operation is low, the production efficiency is low, the number of screw holes and position recognition rate is low, and the placement of blocking balls is slow, which cannot meet the needs of enterprises. , which increases the production cost of the enterprise

[0005] Therefore, domestic automobile wheel hub manufacturers have not yet realized the automatic shielding of screw holes in the automotive wheel hub spraying process. The simple manual operation is time-consuming, laborious, and has low accuracy and poor reliability.

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