Initial position setting method of grinding wheel in...

Details Initial position setting method of grinding wheel in... Initial position setting method of grinding wheel in...

2004-12-10

2008-10-14

Morgan, Eileen P. (Department: 3723)

Abrading

Precision device or process - or with condition responsive...

With indicating

C451S010000, C451S011000, C451S041000, C451S063000, C451S287000, C451S262000, C451S269000

Reexamination Certificate

active

07435158

ABSTRACT:
The present invention provides an initial position setting method of grinding wheels, before starting a grinding operation, in a vertical double disc surface grinding machine for surface grinding the upper and lower grinding surfaces of a work-piece simultaneously by rotation-driving a pair of grinding wheels by a grinding wheel rotation drive motor and moving the grinding wheels up and down by a grinding wheel vertical drive motor. This method comprises a moving stroke (#1, #4) for rotating the grinding wheels (2, 3) by the grinding wheel rotation drive motors (46), and vertically moving the grinding wheels (2, 3) by the motors for elevating/lowering the grinding wheels (41) toward ground surfaces of the work-piece (W) from a setting-start position (Q1) which is vertically separated away from the ground surfaces of the work-piece (W), a detection stroke (#2, #5) for detecting contacts between the grinding wheels (2, 3) and the ground surfaces of the work-piece (W), and stopping the vertical movement of the grinding wheels (2, 3) based on the detection, and an initial position setting stroke (#3, #6) for vertically moving the grinding wheels (2, 3) by the motors (41)for elevating/lowering the grinding wheels, by a predetermined amount in a direction separating away from the ground surfaces of the work-piece (W).

REFERENCES:
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patent: 5980366 (1999-11-01), Waddle et al.
patent: 6881133 (2005-04-01), Saitoh et al.
patent: 2006/0194511 (2006-08-01), Nagayama et al.
patent: 47-2195 (1972-02-01), None
patent: 4-365548 (1992-12-01), None
patent: 2002-307270 (2002-10-01), None
patent: 2004-066392 (2004-03-01), None
patent: 2004-98197 (2004-04-01), None
International Search Report dated Mar. 22, 2005 with English translation of relevant portion (Four (4) Pages).

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