Method and appartus for machining a screw thread with little dispersion
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United States of America Patent
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-
Aug 9, 1988
Issued Date -
N/A
app pub date -
Nov 10, 1987
filing date -
Jul 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an NC-lathe comprising a thread touch sensor provided with a touch portion to be brought into contact with an effective radius/diameter portion of a screw thread, an automatic measuring device electrically connected to the thread touch sensor, and an automatic correction device connected to the automatic measuring device; an effective radius or diameter of a screw thread is measured by bringing the touch portion of the thread touch sensor into contact with an effective radius/diameter portion of the screw thread, the measured dimension is compared with a desired dimension, and when a difference is produced between the respective dimensions, the NC-lathe is controlled by correcting an amount of machining by means of the automatic correction device.
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