Method for determining ductile-regime grinding of hard and brittle material based on brittle removal proportionality coefficients and surface roughness

Abstract

The invention discloses a method for determining ductile-regime grinding of a hard and brittle material based on brittle removal proportionality coefficients and surface roughness, and belongs to thetechnical field of grinding of hard and brittle materials. 100 sample areas S<c> are selected as observation units on the grinding surface of the hard and brittle material, the surface area S of each observation unit is measured, the average value of the 100 observation units is taken as S<k> value of the grinding surface, the surface roughnesses S of the 100 sample areas are measured, theaverage value of the surface roughnesses S of the 100 sample areas is calculated as the surface roughness S of the grinding machining surface, and if both S<k><10% and S<0.01 [mu]m are met, it is considered that ductile-regime grinding of the hard and brittle material is achieved. According to the method for determining ductile-regime grinding of the hard and brittle material based on thebrittle removal proportionality coefficients and surface roughness, whether the ductile-regime grinding of the grinding surface of the hard and brittle material is reached can be accurately determined, and the limitation of low credibility due to the fact that an existing determination method only relies on a micro-topography photo of the grinding machining surface is overcome.

Description

technical field [0001] The invention relates to a grinding determination method for the ductility domain of hard and brittle materials, in particular to a grinding determination method for the ductility domain of hard and brittle materials based on the brittleness removal ratio coefficient and surface roughness, and belongs to the technical field of grinding of hard and brittle materials. Background technique [0002] With the development of modern science and technology, the development of advanced ceramic materials is extremely rapid. Advanced ceramic materials such as SiC ceramics often have special electronic, acousto-optic and thermodynamic properties, and play an extremely important role in aerospace, space technology and other fields. Function, in order to meet the requirements of assembly and use, hard and brittle material components generally need to be machined to meet the dimensional accuracy and surface quality requirements of parts. Due to the high hardness and b...

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Problems solved by technology

[0003] In 1991, Bifano clearly proposed a new grinding process for hard and brittle materials - ductile domain grinding, that is, under certain grinding conditions, any brittle material can be processed by grinding to remove material by plastic flow Technology, as an important high-quality and high-precision processing method for hard and brittle materials, ductile zone grinding has attracted widespread attention in the industry, especially in the field of mirror grinding of ceramic materials. Whether the grinding surface can achieve the ductile zone removal of materials, Bifano uses the proportion of the broken area of ​​the grinding surface of brittle materials to determine, and stipulates that the grinding surface in the ductile zone should control the proportion of the broken area of ​​the grinding surface below 10%. This method has been used by the grinding community since it was proposed, but this The first method has its obvious limitations, that is, whether the removal of ductile domains on the processed surface mainly depends on the photos of the microscopic topography of the processed surface and personal subjective judgment, and lacks specific and quantitative judgment indicators, which leads to inaccurate judgment results and subjective Strong, in this context, it is imminent to propose a stable, quantifiable, and small individual difference grinding judgment method for the ductility domain of the surface of hard and brittle materials

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