TIP HOLDING MEMBER, CHAMFERING MACHINE, AND CUTTING TIP

WIPO Patent Application WO/2020/137571

A1

[Problem] To provide a chamfering machine with which it is possible to change a cutting edge contact angle without switching a tip holding member. [Solution] In said chamfering machine 1, a tip holding member 16 has, in a leading edge section 28 thereof, a tip fixing recess 34 with which it is possible to selectively fix a thick cutting tip 30 and a thin cutting tip 32. The tip fixing recess 34 has a first side surface 38 that engages with the periphery 30b of the thick cutting tip 30, and a second side surface 40 that engages with the periphery 32b of the thin cutting tip 32. The second side surface 40 is formed so as to protrude from the first side surface 38, on a side on which a cutting edge 32d of the thin cutting tip 32 protrudes outward of the leading edge section 28. By switching the cutting tips 30, 32 of different thicknesses, the cutting edge position in a rotating direction changes, and it is possible to change the cutting edge contact angle. Moreover, the thin cutting tip 32 is fixed in a position shifted towards the cutting edge 32d by the second side surface 40, and the trajectory T2 of the cutting edge 32d of said thin cutting tip 32 and the trajectory T2 of the cutting edge 30d of the thick cutting tip 30 are substantially the same.

MIYAGI TAKANORI (JP)

PCT/JP2019/048630

July 02, 2020

December 12, 2019

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NITTO KOHKI CO (JP)

B23C3/12; B23C5/10

JP2012206243A	2012-10-25
JP2010179409A	2010-08-19
JP2007229857A	2007-09-13
CN206083961U	2017-04-12
JPH08243828A	1996-09-24

ITOH, Shigeru et al. (JP)

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