Device for automatic control of non-roundness and eccentricity of small rotating parts
DOI:
https://doi.org/10.31643/2027/6445.39Keywords:
small products, non-roundness of products, inspection accuracy, eccentricity, inspection device.Abstract
In the field of mechanical engineering, one of the key tasks is quality control of manufactured products. Particular attention should be paid to quality control of small parts used in precision devices, metalworking machines, and equipment for the metallurgical and defense industries that operate at high rotational speeds. The aim of this study is to develop a device for controlling the out-of-roundness and eccentricity of rollers weighing up to 10 g. The paper proposes a device using a new method of free rotation of cylindrical products with a radius of r = 4 mm on support rollers rotating at a speed of up to 15000 rpm. The advantage of this work is that the geometric and kinematic parameters of the device were determined depending on the mass-geometric characteristics of the controlled products in the absence of radial displacement of the center of mass: e=0. Five products with a conditional displacement of the center of mass e=4; 6; 8; 12; 15 μm, artificially created by removing a certain amount of material from the average outer surface. The mass of the product before and after removal was determined on analytical scales. The number of measurements of one product at each roller rotation speed was n=12. Based on the data obtained, the average angle of product breakage from the rollers was calculated, which can be used to judge the quality of the controlled products: as the eccentricity increases, the angle at which the product breaks from the rollers decreases. The measurement accuracy of the device was evaluated for the case when measurements were taken for a product with e=8 μm at nr=9000 rpm.
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