Method and device for detecting surface topography of fixed abrasive grinding tool

Abstract

The invention discloses a method and device for detecting the surface topography of a fixed abrasive grinding tool. The method comprises the following steps that a CCD camera is connected to a computer through an image acquisition card, the CCD camera transmits the image of the fixed abrasive grinding tool to be detected to the computer and displays the image on a computer monitor, and the position of the CCD camera is changed and the fixed abrasive grinding tool to be detected is rotated so that a lens of the CCD camera can be aligned with a detected surface area of the fixed abrasive grinding tool to be detected; surface topography images of the detected area of the grinding tool are acquired continuously to form an image sequence, and the acquired surface topography images of the detected area of the fixed abrasive grinding tool to be detected are transmitted to the computer form image processing; and the acquired three-dimensional information of the surface topography of the fixedabrasive grinding tool is used for calculating the surface three-dimensional evaluation parameters in accordance with the international standard ISO25178-2, and the evaluation of the surface topography of the fixed abrasive grinding tool is realized. The method and device do not cause abrasion and damage to the grinding tool.

Description

technical field [0001] The invention relates to a method and a device for detecting the surface topography of a workpiece, in particular to a method and a device for detecting the surface topography of a consolidated abrasive tool. Background technique [0002] Hard and brittle materials are widely used in aerospace, biomedical, electronic communications, automobiles, new energy and other industrial fields. At present, precision ultra-precision grinding using bonded abrasive tools is still the most effective method for hard and brittle materials. Consolidated abrasives have strong material removal ability, low wear rate, long service life, stable grinding process, easy to obtain high surface quality and processing efficiency, etc. The abrasive grains whose surface protrudes from the bond perform micro-cutting on the surface of the workpiece to achieve precise and ultra-precision surface processing. Therefore, the microscopic topography of the abrasive tool surface, such as...

AI Technical Summary

Problems solved by technology

However, non-contact measurement, especially the optical measurement method is very sensitive to environmental factors, and the grains of different shapes are randomly distributed on the surface of the abrasive tool, which is easy to cause diffraction

Holes or deep grooves formed on the surface during the manufacturing or dressing process of abrasive tools will cause light scattering, making the corresponding areas imaged as bright spots (black holes), which are difficult to be identified, resulting in the detection results of the abrasive tool surface cannot accurately reflect the abrasive tool surface Actual landform

At present, there is no mature measuring device in the market that can comprehensively and accurately detect the surface topography of bonded abrasives such as grinding wheels and abrasive belts, and then evaluate their grinding performance.

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