Digitally controlled grinding machine with rest apparatus

Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof

Patent

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Details

51238S, B24B 4902, B24B 4106

Patent

active

042054923

ABSTRACT:
A digitally controlled grinding machine provided with a rest apparatus which is opposed to a wheel head, carrying a grinding wheel, for supporting against grinding resistance a workpiece rotatable on a support device, and with a measuring device, which outputs first and second size signals to a digital feed controller respectively when the workpiece is ground to first and second predetermined sizes. The feed controller controls a first servomotor to advance a pair of shoes of the rest apparatus until the first size signal is output and also controls a second servomotor to advance the wheel head until the second size signal is output. The controller, when receiving the second size signal, controls the first servomotor to retract each of the shoes by a predetermined retraction amount, being set in a digital switch, from an advanced end position which is adjusted in dependence upon the first size signal and in a successive grinding cycle, controls the first servomotor to start the advance feed of each of the shoes from a retracted end position which is spaced by the predetermined retraction amount from the advanced end position, so that compensation is made for wear of the shoes.

REFERENCES:
patent: 3967414 (1976-07-01), Tamesui
patent: 3977129 (1976-08-01), Bottomley

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