Study on Finishing of Curved High Performance Ceramic Surface by using a Semispherical Diamond Grinding Tool

半球形金刚石磨具精加工高性能陶瓷曲面表面的研究

基本信息

批准号：
61550087
负责人：
MIYOSHI Takashi
金额：
$ 1.28万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1987
项目状态：
已结题

项目摘要

The purpose of this research project is to first develop a dual-axis spherical diamond grinding tool for finishing the curved high performace ceramic surfaces, secondly study the finishing mechanism and properties of the dual-axis grinding tool in which the semi-spherical (or a part of spherical body) diamond grinding wheel can be revolve on both the main spindle and the wheel axis at the same time.The grinding experiments for example Si_3N_4 and Al_2O_3 ceramics are carried out by using the developed grinding tool directly attached to the main spindle of the N/C milling machine tool. On the other hand, in order to examine the breaking strength of the ground Al_2O_3 ceramics, the three-points flexural strength tests are done.The results obtained are summarized as follows.(1)By dual-axis grinding the vertical surfaces of Si_3N_4 ceramics with the semispherical diamond wheel, we can obtain the surface roughness of less than 5<micrn>mRz and the stock removal corresponding to the given depth of cut.(2)By the dual-axis diamond grinding wheel with the part of spherical body, the surface roughness of about 1.3<micrn>mRz and 2.4<micrn>mRz can be obtained for the plane surfaces and the vertical surfaces of Al_2O_3 ceramics respectively. The normal forces are relatively small values of about 7N for the plane surfaces and 4N for the vertical surfaces.(3)By the tree-points flexural strength tests of Al_2O_3 ceramics, the average values of flexural strength are 50 kgf/mm^2 for the plane surfaces and 41 kgf/mm^2 for the vertical surfaces. It is noticed that the strength for the vertical surfaces is rather higher than that of general Al_2O_3 ceramics (about 40 kgf/mm^2).

该研究项目的目的是首先开发一种双轴球形钻石研磨工具，用于完成弯曲的高性能陶瓷表面，其次研究双轴磨削工具的饰面机制和特性，其中半球体（或球体的一部分）可以在两个方向盘上旋转时，钻石磨碎的时刻是钻石磨碎的，钻石磨碎的时间是射线的仪表。 SI_3N_4和AL_2O_3陶瓷是通过使用直接连接到N/C铣床主轴的开发的磨削工具来执行的。另一方面，为了检查地面AL_2O_3陶瓷的破裂强度，进行了三点弯曲强度测试。所获得的结果总结如下所示。（1）通过双轴磨削SI_3N_4陶瓷的垂直表面，用SI_3N_4陶瓷的垂直表面与半球钻石轮的相关性，我们可以将其转换为不小于5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 < （2）通过双轴钻石磨牙带有球形体的一部分，可以在平面表面和Al_2o_3 ceramics的平面表面和垂直表面上获得约1.3 <mincn> mrn> mrn> mrn> mrz的表面粗糙度。平面表面的正态力相对较小，垂直表面的值相对较小。（3）通过Tree-Points Al_2O_3陶瓷的弯曲强度测试，弯曲强度的平均值为50 kgf/mmmm^2的平面表面和41 kgf/mm^2的平均值。人们注意到，垂直表面的强度高于一般的Al_2O_3陶瓷（约40 kgf/mm^2）。