A Grinding Judgment Method for Ductility Zone of Hard and Brittle Materials Based on Brittle Removal Scale Coefficient and Surface Roughness

Abstract

The invention discloses a method for determining the ductility domain grinding of hard and brittle materials based on the brittleness removal ratio coefficient and surface roughness, belonging to the technical field of hard and brittle materials grinding, and selecting 100 sampling areas S on the grinding surface of hard and brittle materials c is the observation unit, for each observation unit surface area S mi Take the measurement, take the average value of 100 observation units as the grinding surface S k Value, measure the surface roughness S of 100 sampling areas a , calculate its average value as the surface roughness value S of the grinding surface a , if both satisfies S k <10%, S a <0.01μm, it is considered that hard and brittle materials have achieved ductile zone grinding. The invention can accurately judge whether the grinding surface of the hard and brittle material has reached the ductility zone grinding, and overcomes the limitation that the existing judging method only relies on the photo of the microscopic topography of the grinding surface, resulting in low reliability.

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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