Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1990-05-04
1992-09-08
Schwartz, Larry I.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
82 111, 82106, 409199, 74813C, 51237CS, 51216ND, B24B 542, B24B 4722
Patent
active
051447720
ABSTRACT:
An indexing mechanism in a machine tool for selectively positioning plural pin portions of a crankshaft at the machining position aligned with the work spindle, wherein a indexing member engaging with the crankshaft through an engaging pin is rotated by an indexing motor through a gear train. The crankshaft is initially rotated in a first direction until a selected pin portion engages with a rest shoe of a rest device provided on the bed in order to be positioned in a reference angle position, in which the selected pin portion is located at the machining position aligned with a work spindle. The crankshaft is then clamped on the chucking device. After that, the indexing motor is rotated in a second direction opposite to the first direction until the load of the motor exceeds a reference level, so that the influence of a backlash in the gear train and a clearance between the engaging pin and the crankshaft is eliminated. After the completion of a grinding operation on the selected pin portion, the indexing member is thereafter rotated in the second direction by a predetermined amount so as to position a next pin portion in the machining position.
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Patent Abstracts of Japan; vol. 6, No. 83 (M-130)(961) May 21, 1982, & JP-A-57 21261 (Toyoda Koki K.K.) Feb. 3, 1982.
Patent Abstracts of Japan; vol. 11, No. 188 (M-599)(2635) Jun. 17, 1987, & JP-A-62 15070 (Honda Motor Co., Ltd.) Jan. 23, 1987.
Inoue Masayoshi
Irie Hidetaka
Kawamata Taisuke
Maruyama Toshio
Murayama Koichi
Carroll Kevin J.
Schwartz Larry I.
Toyoda Koki Kabushiki Kaisha
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