Single-grain continuous scratching interference behavioral testing method for spherical grinding head pre-maintenance rigid and brittle test piece

Abstract

The invention discloses a single-grain continuous scratching interference behavior testing method for a spherical grinding head pre-maintenance rigid and brittle test piece, and belongs to the field of material performance testing and precision and ultra-precision machining in machining.The method comprises the steps that the rigid and brittle test piece is fixed to an electric spindle, and online movable balance is performed on the test piece; then, a spherical grinding head is adopted for performing disc maintenance on the test piece, and the requirement for testing needed end face run-out and roughness is met; then, a reloading top end is fixedly connected with a tool head for single grains, and tool setting is performed in the displacement process; finally, scratching testing is performed, the test piece rotates at the designated rotating speed, a tool head performs radial feed with the designated cutting depth, interference spiral scratches are performed on the end face of the test piece, and a measuring system collects scratching force, acoustic emission signals and other physical quantity in the process.According to the single-grain continuous scratching interference behavior testing method, interference behaviors among the grains in the high-speed grinding process can be simulated, and the related testing result can be used for intensive study 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 processing in mechanical processing, and specifically relates to a method for testing the continuous scratching interference behavior of a single abrasive particle of a spherical grinding head pre-repaired hard and brittle test piece. Background technique [0002] The grinding process can be regarded as a cutting process in which a large number of unevenly arranged and irregularly distributed abrasive grains of various shapes are completed 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 action of the fine abrasive particles that make up the grinding wheel is the basis of the grinding process. As the basic mode of the grinding process, single abrasive particle cutting 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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