Engineering ceramic laser induction metamorphic wet-type grinding method

A technology of laser induction and engineering ceramics, which is applied in the field of grinding processing, can solve the problems of reducing the service life and working reliability of ceramic parts, reducing the wear resistance of ceramic surfaces, and easily producing cracks and falling off, so as to reduce the grinding force and The effect of grinding wheel wear, improving processing conditions, and reducing strength

Inactive Publication Date: 2014-05-21
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

Since the metamorphic layer and the engineering ceramic matrix exhibit completely different physical and mechanical properties, cracks and shedding are prone to occur during the use of ceramic parts, resulting in a decrease in the wear resistance and fatigue resistance of the ceramic surface, thereby greatly reducing Service life and operational reliability of ceram

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  • Engineering ceramic laser induction metamorphic wet-type grinding method
  • Engineering ceramic laser induction metamorphic wet-type grinding method
  • Engineering ceramic laser induction metamorphic wet-type grinding method

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[0031] The following will be combined with Figure 1-8 The present invention is further described.

[0032] Existing research work is focused on how to avoid or minimize the occurrence of metamorphic layers during processing. In view of the loose structure of the metamorphic layer and its easy removal by grinding, the present invention adopts reverse thinking and proposes a new method of actively introducing the metamorphic layer to improve the machinability of engineering ceramics, that is, the laser-induced metamorphic wet grinding method, which specifically includes the following steps:

[0033] The first step is to use pulsed laser to induce a metamorphic layer on the surface of engineering ceramics, and precisely control the depth and distribution of the metamorphic layer;

[0034] In the second step, the degenerated surface layer is removed under wet grinding conditions.

[0035] Since the performance of ceramic materials has a great influence on the mechanism of laser...

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Abstract

The invention relates to an engineering ceramic material laser induction metamorphic wet-type grinding method. The engineering ceramic material laser induction metamorphic wet-type grinding method is characterized by including the following steps: (1) adopting Nd: radiating the surface of an engineering ceramic part through YAG lasers under the auxiliary-gas-free condition, and pre-inducing the surface of the engineering ceramic part to generate an initial metamorphic layer; (2) after the metamorphic layer is generated on the surface of the engineering ceramic part, carrying out accurate web-type grinding, wherein water-based cooling liquid is adopted, the liquid supplying pressure is 6 MPa, the grinding wheel linear speed is 60 m/s, the grinding depth is 1.5 mm, and the feeding speed is 2.0 m/min. By means of the engineering ceramic material laser induction metamorphic wet-type grinding method, the high-quality machined surface which is free of cracks, free of a fused metamorphic layer and low in roughness can be obtained, the machinability of ceramic materials can be greatly improved, and compared with engineering ceramic traditional grinding, machining by a large grinding depth is allowed. A new machining method is provided for hard, crisp and difficult-to-machine materials such as engineering ceramic.

Description

technical field [0001] The invention relates to a grinding processing method, in particular to a processing method for laser-induced metamorphic grinding of engineering ceramics. Background technique [0002] Engineering ceramics are widely used in aerospace, electronic appliances, automobiles and Manufacturing applications are increasingly widespread. At present, it is widely used in nozzles of aerospace machinery, high temperature resistant parts of engines, ceramic knives, electronic components, basic porcelain parts of machinery industry, ceramic parts of mining metallurgical system engineering, experimental instruments, etc. [0003] However, it is difficult to process engineering ceramics by traditional turning and milling methods. At present, diamond grinding wheels are mainly used for grinding, which has problems such as low processing efficiency, large consumption of diamond grinding wheels, and high manufacturing costs (accounting for more than 75% of the cost of...

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Application Information

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IPC IPC(8): B24B1/00
CPCB23K26/0006B23K26/0093B23K26/0643B23K26/57B23K2103/52B24B1/00
Inventor 张晓红安伟科陈根余邓朝晖周志雄
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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