Precision polishing system of fatigue specimen installed on cylindrical grinding machine and precision polishing method

Abstract

The invention discloses a precision polishing system of a fatigue specimen installed on a cylindrical grinding machine and a precision polishing method, belongs to the technical field of metal fatiguespecimen polishing and relates to a longitudinal precision free abrasive polishing system and method for fatigue specimens with circular sections. The system is composed of a cantilever mechanism, aclamping plate, an adjusting spring, a polishing spindle and a polishing slurry spraying circulation system. The system can be installed on the basis of the existing cylindrical grinding machine, so that the fatigue specimen grinding and polishing functions are achieved through one grinding machine, the forming process is concentrated, the workpiece mounting frequency is reduced, and efficiency isimproved; and compared with manual grinding with abrasive paper, the precision, stability and reliability are high, the polishing efficiency can be greatly improved, and the labor intensity of workers is relieved.

Description

technical field [0001] The invention belongs to the technical field of metal fatigue sample polishing processing, and relates to a longitudinal precision free abrasive gas drum polishing system and method for circular cross-section fatigue samples. Background technique [0002] According to GB / T 3075-2008 "Metal Material Fatigue Test Axial Force Control Method", the original cross-section of the metal material fatigue test sample has two types: circular and rectangular. At present, the most widely used is the circular cross-section sample. The suggested machining process of the sample is longitudinal milling, finishing turning and fine grinding, and the final finishing of the surface of the working part is carried out by longitudinal polishing. The purpose of polishing is to minimize the residual stress and work hardening on the surface of the sample. , under a magnification of at least 20 times, there is no trace of transverse processing. Usually, the number of fatigue samp...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the limitation of equipment, lateral grinding is often used. If the polishing is not thorough, the knife marks and scratches will not be completely removed, which will become stress concentration points; the current polishing methods are mostly manual sandpaper polishing, and the surface roughness and residual Stress distribution is uneven, resulting in scattered data of fatigue test results; and manual polishing is inefficient, labor-intensive, and consumes a lot of sandpaper

At present, there is no equipment for polishing fatigue samples. It is necessary to invent a longitudinal precision free abrasive air drum polishing system and method for circular cross-section fatigue samples.

Images