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1. 发明专利

JPH02232101A MIRROR LIKE SURFACE CUTTING METHOD FOR GERMANIUM MONOCRYSTAL 失效
公开(公告)号：JPH02232101A
公开(公告)日：1990-09-14
申请号：JP5265389
申请日：1989-03-03
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAKASUJI TOMOAKI , KODERA SUNAO , HARA MOICHI , MATSUNAGA HIROYUKI
IPC分类号： B23B1/00
摘要： PURPOSE:To obtain such a mirror like surface cutting method for a germanium monocrystal face as to finish efficiently the cut face into the uniform and preferable surface roughness by setting the cutting direction in the vicinity of the fixed direction or its equivalent direction. CONSTITUTION:A work piece 2 with a germanium monocrystal face is fixed at a work holder with wax, and the work holder is fixed at the tip of a lathe main spindle. For the tip of a turning tool, a diamond R-bite with a round knife-edge is used. Clockwise rotation is given to the main spindle, the feed from the outside to the center of the work piece 2 is given to the tool, the radial direction toward the rotation center is made B, the main spindle clockwise rotation direction is made C, and a cutting direction D is made a direction 110 which is a cutting direction preferable in surface roughness. As the turning is thus performed in the fixed cutting direction and further in the direction set only to have the best machinability, brittle fracture is not easily generated, and the surface roughness of the cut face can be made uniform and preferable.

2. 发明专利

JPH01121107A CURVED SURFACE MACHINING DEVICE 失效
公开(公告)号：JPH01121107A
公开(公告)日：1989-05-12
申请号：JP27732287
申请日：1987-11-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： NAKASUJI TOMOAKI , KODERA SUNAO , HARA MOICHI , MATSUNAGA HIROYUKI
IPC分类号： B23B5/36
摘要： PURPOSE:To enable the machining device to perform machining operations regardless of the length of the focal distance of a paraboloidal shape by installing an inching rotary table rotating at a specified angle of rotation to a Y axis control table, and providing a sample holder fixing its one end on the inching rotary table and holding a work on the other end. CONSTITUTION:An inching rotary table rotating around its central axis at a specified angle is installed on a Y axis control table 6b of a two-axes control table 6, and one end of a sample holder 8 is fixed on the table 7 and the other end of it holds a work 2. A spindle 1 to which a cutting tool is attached is arranged near the two-axes control table so that the rotary shaft is at right angles to X direction of a X axis control table 6a and Y direction of the Y axis control table 6b, thus a paraboloidal shape is formed by the rotation of the table 7. Thus, the focal distance of the paraboloidal shape formed on the work 2 can be set in accordance with the distance from the center of rotation of the table 7 to the position of the work 2 simply by changing the length of the end side of the sample holder 8 holding the work 2.

3. 发明专利

JPS6487135A HIGH-PRECISE LATHE MACHINING METHOD 失效
公开(公告)号：JPS6487135A
公开(公告)日：1989-03-31
申请号：JP24271987
申请日：1987-09-29
申请人： MITSUBISHI ELECTRIC CORP
发明人： KODERA SUNAO , NAKASUJI TOMOAKI , HARA MOICHI , MATSUNAGA HIROYUKI
IPC分类号： B23Q15/013
摘要： PURPOSE:To form a high-precise shape without needing primary reference surface, by a method wherein a premaching surface shape is measured, and a cutting amount is corrected according to a surface shape serving as an absolute precision reference. CONSTITUTION:A non-contact displacement gauge 3 is situated ahead, in an advancing direction, of a tool 1, and a distance between a premachining surface 5a right before machining and a tool rest 4 is determined. In which case, the tool rest 4 is moved in a direction X at a specified speed V, and the tool 1 is situated in a position of X=Vt at a time (t). In machining, a premachining surface is previously determined by a shape measuring device, and by controlling a fine cut device 2 so as to satisfy a formula of U(t)=S(t)+f(Vt+d)-Z0(x), wherein f(x) is a premachining surface, U(t) is a cutting amount, S(t) is an output of the displacement gauge 3, and Z0(x) is a desired machining shape, a desired finish surface can be formed even if an error is produced in a cutting direction. Since an absolute reference is set according to a premachining surface, this method eliminates the need for a primary reference surface and enables formation of a high-precise shape.

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