Grinding machine control

Details Grinding machine control Grinding machine control

1977-03-14

1978-02-21

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

5116593, B24B 4900

Patent

active

040744671

ABSTRACT:
A multimodal cycle for a grinding machine is modified as the function of the grinding force and the mode of operation. The grinding force is monitored by measuring the electrical load value upon the grinding wheel motor during operating conditions and biasing this value by a stored value representative of the nongrinding idle load. The idle load bias is updated with each grinding cycle and the grinding force signal is used to control a variety of machine operations. If the grinding force signal exceeds a predetermined threshold during an early portion of the grinding cycle, the wheelhead advancement is terminated; while the same situation in a later portion of the cycle permits continued wheelhead advancement but at a reduced rate. The grinding force signal is also used to count parts and detect part absence. It is further used to regulate rough and finished spark-outs as well as a peak load limit for the grinding cycle. The threshold level for these latter three functions is further modulated in accordance to the size of the grinding wheel.

REFERENCES:
patent: 3589077 (1971-06-01), Lenning
patent: 3728826 (1973-04-01), Wada
patent: 3796012 (1974-03-01), Uhtenwoldt

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