Title:
HOLDER FOR CUTTING-TOOL FASTENING
Document Type and Number:
WIPO Patent Application WO/2018/186695
Kind Code:
A1
Abstract:
The present invention relates to a holder for cutting-tool fastening which allows a cutting tool, such as a drill or an end mill, or a side milling cutter, to be fastened to the head part of a machine tool at the time of reaming or milling on a machining center or the like, and allows a driving screw gear and a spindle to be installed inside a holder having a single form, rather than dividing a holder body, so that verticality which is the center of the holder remains unchanged even if the driving screw gear and spindle are replaced as necessary. To this end, the present invention comprises: an integrated holder body (30) which has a tapering shank part (31) formed at the top thereof and an adapter (32) formed at the bottom thereof, the adapter (32) having a tapering part (32a) corresponding to the tapering part (81) of a collet (80), and also has a mounting hole (34) formed vertically so as to connect to the tapering part (32a), a flange part (33) which is in contact with the lower surface of a head part (9) and formed at the boundary between the shank part (31) and the adapter (32), an insertion hole (35) communicating with the mounting hole (34) and being orthogonally formed in the flange part (33), and a stop-pin fastening hole (38) formed in the flange part (33); a spindle (40) which is embedded via the mounting hole (34) formed in the center of the holder body (30) and has a first male screw part (41) formed at one end thereof and screw-coupled to the collet (80), a driven screw gear (42) formed at the other end thereof, and a ring-shaped recessed groove (43) formed between the first male screw part (41) and the driven screw gear (42); a stop pin (70) which is installed so as to be inserted in the ring-shaped recessed groove (43), formed on the spindle (40), via the stop-pin fastening hole (38) formed in the flange (33) and allows the idling of the spindle (40); a driving screw gear (50) which is installed via the insertion hole (35) of the flange part (33) formed on the holder body (30) and is engaged with the driven screw gear (42) of the spindle (40); and a cap (60) which is screw-coupled to the insertion hole (35) formed in the holder body (30), closes the insertion area of the driving screw gear (50), and has a tool insertion hole (61) formed at the center thereof, wherein the collet (80) is inserted via the collet storage/maintenance hole (39) of the adapter (32) and screw-coupled to the first male screw part (41) of the spindle (40).
Inventors:
SEO JAE WON (KR)
Application Number:
PCT/KR2018/004013
Publication Date:
October 11, 2018
Filing Date:
April 05, 2018
Export Citation:
Assignee:
SAMCHULLY MACHINERY CO LTD (KR)
International Classes:
B23Q3/12; B23C5/26; B23C9/00
Foreign References:
| JP3285809B2 | 2002-05-27 | |||
| JP4157420B2 | 2008-10-01 | |||
| JP3359038B2 | 2002-12-24 | |||
| KR20160052366A | 2016-05-12 | |||
| JP4100747B2 | 2008-06-11 |
Attorney, Agent or Firm:
KIM, Byung Jin et al. (KR)
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