A test method for continuous scratching interference behavior of single abrasive grains in pre-repaired hard and brittle specimens by mutual reference method

Abstract

The invention discloses a single abrasive particle continuous scratching interference behavior test method using a mutual reference method to pre-repair a hard and brittle test piece and belongs to the fields of material performance test and precision and ultra-precision machining in machining.The method includes: subjecting the hard and brittle test piece to back lining, and using the mutual reference method to treat the test piece and the back lining so as to reach the surface quality and parallelism requirement needed by the test; changing a tool head with a single abrasive particle fixedly connected to the top end, and performing tool setting during the changing process; performing the scratching test, to be more specific, allowing the test piece to rotate at appointed rotation speed, radially feeding the tool head at appointed knifing to form interference spiral scratches on the end face of the test piece, and by a measuring system, collecting physical quantities such as scratching force and acoustic emission signals.The method has the advantages that the interference behavior between abrasive particles during a high-speed grinding process can be simulated, and related test results are applicable to the deep researches of the grinding mechanism and grinding parameter optimization.

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 single abrasive grain continuous scratching interference behavior test method for pre-repairing hard and brittle test pieces using a mutual reference method. 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. In the a...

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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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