A test method for the continuous scratching interference behavior of a single abrasive particle on a ferrous metal specimen pre-conditioned by a spherical grinding head

Abstract

The invention discloses a method for testing the continuous scratching interference behavior of single abrasive particles of a black metal test piece pre-ground by a spherical grinding head and belongs to the field of material performance testing in machining and precise and ultra-precise machining.The black metal test piece is fixed to an electric main shaft and subjected to online dynamic balance; the spherical grinding head is adopted for grinding a disk of the test piece, and the end face run-out and roughness requirement required for testing is met; a tool head with single abrasive particles fixedly connected to the top end is reloaded then, and tool setting is performed in the replacement process; finally, a scratching test is started, the test piece rotates at an assigned rotating speed, the tool head performs radial feeding at assigned cutting depth, interference spiral scratches are formed on the end face of the test piece, and a measuring system collects scratching force, sound emitting signals and other physical quantity in the process.By means of the method, the interference behavior between the abrasive particles in the high-speed grinding process can be simulated.A relevant testing result can be used for deep research of a grinding mechanism and optimization of grinding parameters.

Description

technical field [0001] The invention belongs to the field of material performance testing and precision and ultra-precision machining in mechanical processing, and specifically relates to a method for testing the continuous scratching interference behavior of a single abrasive grain of a ferrous metal specimen pre-conditioned by a spherical grinding head. Background technique [0002] The grinding process can be regarded as a cutting process completed by a large number of unevenly arranged and irregularly distributed abrasive particles of various shapes on the surface of the abrasive tool. In scientific research, complex phenomena are often abstracted into a simplified model to explore some essential issues. The cutting effect of the fine abrasive grains that make up the grinding wheel is the basis of the grinding process. As the basic mode of the grinding process, the cutting of a single abrasive grain has become an important means to understand the complex grinding action....

AI Technical Summary

Problems solved by technology

[0003] Many scholars have done a lot of work on the scratching experiment of single abrasive particles, and developed related test methods and devices. However, due to the lack of test methods and test devices, the influence of multiple abrasive particles interference has not been considered. Most of the research on the mutual interference of abrasive particles is still in the simulation stage, such as using Boolean operations to simulate the material removal of the abrasive particle interference process, or using numerical simulation methods to model and analyze the interference process of multiple abrasive particles

There are also a small number of devices that study the mutual interference of multiple abrasive grains, such as arranging multiple abrasive grains at a certain relative angle and radial spacing, which will produce interference effects when scratching, but the radial spacing of multiple abrasive grains The arrangement error is relatively large (resolution 10μm), so when multiple abrasive particles interfere, the control accuracy of the actual interference amount is not higher than 10μm, so only some large-size (greater than 100μm) abrasive particles can be tested for interference, and the equipment structure Complicated, the adjustment process largely depends on the operator's experience, without automatic adjustment and position feedback control, so it is difficult to achieve high-precision interference behavior testing

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