Title:
LATHE
Document Type and Number:
WIPO Patent Application WO/2022/244630
Kind Code:
A1
Abstract:
Provided is a lathe that can eliminate the need for a device dedicated to detection of breakage of a parting tool. A lathe 1 is provided with a spindle (11), a counter spindle (16), a tool rest 30, a stopper 40, a driving unit (31), and a control unit (70). The stopper 40 positions a bar material B1 at an advanced position P1 where the bar material B1 pushed forward by a material feeding machine 20 from the spindle (11) having released the bar material B1 bumps, and is retractable from the advanced position P1. After completion of an operation of cutting off a workpiece W1 by a parting tool TO3 in a state where the stopper 40 is retracted from the advanced position P1, the control unit (70) carries out a control of causing the driving unit (31) to move the stopper 40 to a position (P3) between the bar material B1 grasped by the spindle (11) and the workpiece W1 grasped by the counter spindle (16), and, when a torque generated by the driving unit (31) exceeds reference torque for detecting the bump of the stopper 40 against the bar material B1, carries out a process (S124) for a case in which the parting tool TO3 is broken.
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Inventors:
ASABA YOHEI (JP)
Application Number:
PCT/JP2022/019624
Publication Date:
November 24, 2022
Filing Date:
May 09, 2022
Export Citation:
Assignee:
STAR MFG CO (JP)
International Classes:
B23B25/06; B23B5/14; B23B13/04; B23B13/12; B23Q17/09
Foreign References:
| JPH05301148A | 1993-11-16 | |||
| JP2020082263A | 2020-06-04 | |||
| JP2012148352A | 2012-08-09 |
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