Gear cutting – milling – or planing – Milling – Process
Patent
1996-09-20
1998-08-18
Howell, Daniel W.
Gear cutting, milling, or planing
Milling
Process
409193, 409239, 408 13, B23B 3500, B23Q 1518
Patent
active
057951128
ABSTRACT:
A temperature measuring device measures the temperature of a main shaft as a numerical value based on the outputs from temperature sensors. A temperature recorder stores the value as time series data. When the heat-induced displacement of the main shaft is in a stationary state, a heat-induced displacement estimate computing unit estimates the displacement based on the instantaneous temperature measurement. When the displacement is in a transient state due to a change in the rotation speed of the main shaft, the computing unit estimates the heat-induced displacement of the main shaft by multiplying the elapsed time from the beginning of the transient state by the ratio of the heat-induced displacement time constant to the temperature time constant and estimating the heat-induced displacement based on the time series data of the time preceding the current time by the result of the multiplication.
REFERENCES:
patent: 3735157 (1973-05-01), Whetham
patent: 4919575 (1990-04-01), Yoshimi et al.
patent: 5303458 (1994-04-01), Sheehan et al.
patent: 5332340 (1994-07-01), Pumphrey
patent: 5387061 (1995-02-01), Barkman et al.
Howell Daniel W.
Okuma Corporation
Tsai Henry W. H.
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