Prestress grinding processing method of ceramic material

A ceramic material, grinding technology, used in metal processing equipment, grinding/polishing equipment, grinding machines, etc., can solve the problems of crushing and cracking, low surface roughness, etc., to increase grinding depth and reduce processing costs , the effect of improving stability and reliability

Inactive Publication Date: 2009-10-28
XIANGTAN UNIV
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Problems solved by technology

With conventional processing technology, ceramic materials are removed by fracture, which is very easy to produce breakage and cracks. It is very difficult to require high processing precision and low surface roughness. Therefore, only the development of advanced processing methods can obtain efficient processing technology. parameters to enable ceramic devices to be more widely used

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  • Prestress grinding processing method of ceramic material
  • Prestress grinding processing method of ceramic material

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Embodiment Construction

[0012] The main principle of the present invention is: taking indentation fracture mechanics and elastoplastic mechanics as the theoretical basis, its schematic diagram is as attached figure 1 shown. Two types of crack systems generated during the grinding process of ceramic materials are analyzed: median cracks and transverse cracks. Among them, the median crack extends to the bottom of the material surface and remains inside the processed ceramic workpiece; the transverse crack will expand to the material surface with the removal of the normal load to form the removal of material. By applying prestress to the processed ceramic parts, the law of crack propagation has changed accordingly. Within the strength range of the ceramic material, as the prestress increases, cracks are not easy to propagate along the bottom of the material, but extend into lateral cracks along both sides of the material to remove the material; and the greater the prestress, the lateral cracks propagat...

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Abstract

The invention discloses a prestress grinding processing method of a ceramic material. The method comprises the following steps of: firstly, testing to obtain compression strength of processed ceramic material work pieces; secondly, using a prestress applying device to applying prestress to the ceramic material work pieces; and then arranging the ceramic material work pieces with the prestress applying device on a grinding machine for grinding and processing. The prestress grinding processing method has the following beneficial effects that 1. from the damage caused to the surface/subsurface, the processing method improves the stability and reliability of processing quality of the ceramic work pieces; 2. in the coarse grinding process of the work pieces, the grinding depth can be increased, thus improving the production efficiency without generating deeper processing damage; 3. not only high-efficiency low-damage grinding processing can be conducted on the common grinding machine, the processing cost is reduced, but also a new processing technique route is provided for high-precision low-damage processing of the ceramic work pieces; and 4. the new technology of ceramic grinding and processing is improved and developed, a new technique for high-efficiency ultraprecision ductile-regime grinding processing is found and the engineering practical application of engineering ceramic is further promoted.

Description

technical field [0001] The invention relates to a processing method of a ceramic material mill. Background technique [0002] Ceramic is a kind of difficult-to-machine material with high hardness and high brittleness. Due to its hard and brittleness, it is easy to form processing cracks during processing, which will cause surface damage and reduce the stability and reliability of ceramic workpieces. The processing quality requirements of ceramic workpieces are very demanding. At present, the main processing method of ceramics in industrial production is grinding, and grinding is the most expensive of all mechanical processing methods. The cost of processing ceramic workpieces can sometimes be as high as 80% of the cost of the entire ceramic workpiece. Obviously, the high cost of processing ceramic workpieces and the difficult-to-control and detectable surface damage limit their wide application. However, when grinding ceramics under normal conditions, the abrasive grains a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B19/22
Inventor 谭援强姜胜强杨冬民张高峰彭锐涛聂时君
Owner XIANGTAN UNIV
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