Title:
CIRCULAR SAW CUTTING MACHINE
Document Type and Number:
Japanese Patent JP2018183824
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To accurately and early detect chipping during cutting in a circular saw cutting machine.SOLUTION: A control apparatus 200 comprises: a calculation processing substrate 210 which comprises a pulse reception circuit 211, a pulse count circuit 212, a rotational frequency derivation circuit 213, a memory part data storage circuit 214, an integrated circuit 215, a normalization processing circuit 216, and a moving average processing circuit 217, and derives a determination value for each cutting operation; and a detection processing substrate 220 which comprises a reference value storage circuit 221, a signal extraction circuit 222, a spike determination circuit 223, a spike cycle extraction circuit 224, and a periodicity determination circuit 225, and determines that chipping occurs when the state such that a difference between a determination value and a reference value exceeds a prescribed threshold periodically occurs during plural times of rotation of a main spindle.SELECTED DRAWING: Figure 6
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Inventors:
WATANABE DAISUKE
Application Number:
JP2017085872A
Publication Date:
November 22, 2018
Filing Date:
April 25, 2017
Export Citation:
Assignee:
NISHIJIMA CORP
International Classes:
B23Q17/09; B23D47/00
Domestic Patent References:
| JPS6224909A | 1987-02-02 | |||
| JPH01164537A | 1989-06-28 | |||
| JP2000317710A | 2000-11-21 | |||
| JP2013132734A | 2013-07-08 | |||
| JPS62271626A | 1987-11-25 | |||
| JP2013252572A | 2013-12-19 |
Foreign References:
| US20040068394A1 | 2004-04-08 |
Attorney, Agent or Firm:
Yashiko Mori