Vision measuring method of crankshaft crank eccentricity and device thereof

Abstract

The present invention provides a vision measuring method of crankshaft crank eccentricity. The method comprises the steps of (1) making a standard shaft and calibrating a camera parameter, (2) obtaining a crankshaft part image, (3) analyzing and extracting crankshaft part image axis characteristic, (4) calculating a crankshaft crank eccentricity parameter, (5) repeating step (3) and step (4), completing the obtainment of the crank eccentricity parameters of ten groups of different crankshaft pose images, removing a maximum one and a minimum one in ten static data, and taking the average value of the remaining data as a final crank eccentricity value. The present invention also provides a vision measuring device of crankshaft crank eccentricity. The device comprises a rectangular-shaped frame formed by aluminum profile and a vertical camera and a horizontal camera arranged on the frame. According to the method and the device, the measurement time of the crank eccentricity is reduced, the measurement accuracy of the crank eccentricity is raised, the processing efficiency of a crankshaft production line is improved, and the measurement cost of the crank eccentricity is reduced at the same time.

Description

technical field [0001] The invention relates to the field of detection of industrial parts, in particular to a visual measurement method and device for the eccentricity of a crankshaft crank. Background technique [0002] The crankshaft is the key part of the engine, and the two journals rotate at high speed to complete the power transmission of the engine. Among them, crankshaft eccentricity is an important direction of crankshaft quality inspection, which is mainly used to measure the quality of crankshaft dynamic balance. [0003] The measurement parameter of crank throw eccentricity at the machining site is that one journal is used as the reference axis, and the other journal is offset in the radial direction when the axis of the other journal passes a unit distance relative to the reference axis. The eccentric parameters of the crankshaft directly affect the assembly process of the crankshaft and the working quality of the crankshaft. If the eccentric value of the cran...

AI Technical Summary

Problems solved by technology

The traditional quality measurement of crankshaft eccentricity is mainly completed by contact three-coordinate measuring machine or special measuring equipment (such as crankshaft eccentricity tester), the measurement steps are complicated, the measurement process takes a long time, the measurement efficiency is low, and the contact measurement method is easy to cause crankshaft Surface damage of parts, resulting in unqualified crankshaft products

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