A method for determining the surface roughness of glass-ceramic grinding

A glass-ceramic, surface roughness technology, applied in the field of engineering ceramics processing, can solve problems such as complex surface forming mechanism

Active Publication Date: 2018-04-03
NORTHEASTERN UNIV LIAONING
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  • Abstract
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  • Claims
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Problems solved by technology

Because glass-ceramic is different from the previous engineering ceramics, its surface forming mechanism is more complicated. There are no relevant reports on the parameters of glass-ceramic grinding conditions and the influence of grinding conditions on the surface roughness of processing.

Method used

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  • A method for determining the surface roughness of glass-ceramic grinding
  • A method for determining the surface roughness of glass-ceramic grinding
  • A method for determining the surface roughness of glass-ceramic grinding

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Embodiment

[0145] A method for determining the grinding surface roughness of glass-ceramics includes the following steps:

[0146] (1) According to the grinding processing conditions, the maximum undeformed chip thickness h is obtained by the following formula max :

[0147]

[0148] Where N d Is the effective number of abrasive particles per unit area, a p Is the grinding depth, d s Is the diameter of the grinding wheel;

[0149] (2) According to the material properties of glass-ceramics, the ductility-ductile brittleness critical depth h is obtained by the following formulas c1 And ductile brittleness-critical brittleness depth h c2 :

[0150]

[0151] Where η 1 Is the ductility domain coefficient, η 2 Is the extension-brittle domain coefficient, K d Is the dynamic change coefficient (commonly used coefficient, usually 0.3), K IC Is the fracture toughness, θ is the half angle of the cone tip of the abrasive grain, H is the microhardness, and E is the elastic modulus;

[0152] (3) According to ...

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Abstract

The invention discloses a determining method for the surface roughness of grinding of microcrystallite glass ceramic. The determining method includes the steps that firstly, the maximum undeformed chip thickness is obtained; secondly, the ductility-ductile brittleness critical depth and the ductile brittleness-brittleness critical depth are obtained; thirdly, a composite grinding factor is obtained; fourthly, an empirical constant, a brittle fracture coefficient, a ductility-brittleness fracture coefficient, an empirical constant x, the brittleness fracture factor and the ductility-brittleness fracture factor are obtained; and fifthly, the surface roughness is determined according to parameters in the first step, the second step, the third step and the fourth step. According to the determining method for the surface roughness of grinding of the microcrystallite glass ceramic, the relevant coefficient of the surface roughness is determined, a mathematical model of the maximum undeformed chip thickness and the surface roughness of the microcrystallite glass ceramic is established, the influence relation of the grinding condition parameters of the microcrystallite glass ceramic on the surface roughness of grinding is determined, and the determining method is suitable for explaining the molding mechanism of the surface roughness of grinding of the microcrystallite glass ceramic.

Description

Technical field [0001] The invention relates to a method for determining the grinding surface roughness of glass-ceramics, in particular to the technical field of engineering ceramics processing. Background technique [0002] Grinding processing belongs to finishing processing in mechanical processing, with less processing volume and high precision. It is widely used in the machinery manufacturing industry. During grinding, a large number of regularly arranged cracks often appear on the surface that is basically perpendicular to the grinding direction, that is, grinding cracks, which not only affect the appearance of the workpiece, but also directly affect it. Workpiece quality. [0003] Engineering ceramics have excellent properties such as high strength, high temperature resistance, wear resistance, and oxidation resistance, and have broad application prospects in aerospace, defense industry, machinery and other fields. Grinding is the main processing method of engineering cera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B1/00
CPCB24B1/00
Inventor 马廉洁顾立晨巩亚东王华
Owner NORTHEASTERN UNIV LIAONING
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