Roundness detecting method for eccentric shaft part

Abstract

The invention belongs to mechanical methods, in particular to a roundness detecting method for an eccentric shaft part. The method is characterized in that a turntable and a measurement support are arranged on a base, an eccentric disc is arranged on the measurement support, a telescopic supporting rod is fixed on the eccentric disc through a rotating bearing, a V-shaped reference block is arranged on the telescopic supporting rod, the telescopic supporting rod is fixed on the eccentric disc through the rotating bearing, and the telescopic supporting rod can freely rotate around the rotating bearing. When the eccentric shaft part is driven to rotate by the turntable, the eccentric disc and the turntable rotate synchronously, so that a measurement probe, the V-shaped reference block and the telescopic supporting rod in the roundness detecting process only move in parallel; when the turntable continuously rotates for one circle, the roundness of the measurement probe on the surface of the part in a 360-degree range is measured by a measurement and control system; and the method is simple, convenient, feasible, scientific, reasonable and high in measurement precision.

Description

technical field [0001] The invention belongs to the category of mechanical methods, in particular to a method for detecting the roundness of eccentric shaft parts. Background technique [0002] In the precision machining process of eccentric shaft parts, such as the grinding process of engine crankshaft pin, it is necessary to measure the roundness deviation of eccentric shaft parts in situ. At present, the method for in situ measurement of the roundness of shaft parts is mainly to use V-shaped The reference block measurement method is to fix the measuring head on the V-shaped reference block. During the roundness measurement process, the two reference planes of the V-shaped reference block are always kept circumscribed with the surface of the measured shaft part by using the support structure, so that by installing on the The measuring probe of the V-shaped reference block obtains the roundness change value of each point on the surface of the measured shaft part. However, ...

AI Technical Summary

Problems solved by technology

However, there is no scientific, reasonable, simple and easy method to maintain a stable and reliable circumscribed relationship between the two reference planes of the V-shaped reference block and the eccentric shaft parts.

The patent application with the application number "03813741.0" and titled "Equipment for Checking Pin Dimensions and Geometric Features" discloses a method for measuring the roundness of eccentric pin parts based on a moving support. However, the structure of the support is complex and difficult to adjust, which is insufficient Flexible and convenient; the patent application with the application number 201110003560.9 and titled "A Method for Measuring the Roundness of Eccentric Parts" discloses a method for measuring the roundness of eccentric shaft parts based on a telescopic support mechanism, but during the measurement process, the measuring head detects The continuous change of angle complicates the roundness data acquisition and calculation process

Images