US 5,405,220 AGranted

Oil feeding collet chuck and its collet

AssigneeNt Tool Corporation

InventorHitoshi Ishikawa

Life of this patent

Estimating the term…

Loading patent…

Abstract

An annular front end base portion, a main portion and an annular rear end base portion form all together a substantial portion of a collet provided with a tapered outside surface adaptable closely in a tapered hole of a collet chuck and a tool holding hole is formed in the axial portion of the collet. In the main portion are formed a first set of axially long radial slits opening at the end surface of the front end base portion and terminating to be closing in the rear end base portion and a second set of axially long radial silts opening at the end surface of the rear end base portion and terminating to be closing in the front base portion. Each of the radial slits of the first set and each of the radial slits of the second set are arranged at proper angular intervals and alternately along the peripheral direction of the collet, and respective zigzag paths are formed which are closed over the whole peripheries of the outside and inside surfaces of the collet, respectively. The outside and inside surfaces of the collet contact closely the inside surface of the tapered hole and the outside surface of a tool fitted in the tool holding hole, respectively along the respective zigzag paths. The collet is able to contract radially owing to the radial slits of the two sets and the cutting oil supplied to the collet flows out of the collet outwards only through jets provided for feeding oil.

Claims10

Dependent claims

An oil feeding collet chuck comprising:

(a) a main body having a front end portion and a tapered hole formed in said front end portion;
(b) an oil passage communicating with said tapered hole,
(c) a collet having an axis, outside and inside surfaces, a tapered outside surface closely adaptable in said tapered hole, a tool holding hole formed along said axis of said collet and an engage portion;
(d) a clamp member to press said collet into said tapered hole, said engage portion connectable to said clamp member;
(e) jets communicating with said oil passage to make cutting oil flow out toward the front end of said tool;
and
(f) a tool fitted in said tool holding hole;
(g) said collet being formed with:
(i) a front end base portion, a main portion and a rear end base portion all together forming a substantial portion of said collet;
(ii) a first set of axially long radial slits opening at the end surface of said front end base portion and terminating in said rear end base portion;
and
(iii) a second set of axially long radial slits opening at the end surface of said rear end base portion and terminating in said front end base portion, each of the radial slits of said first set and each of said radial slits of said second set being arranged at proper angular intervals and alternately along the peripheral direction of said collet, respective zigzag paths being formed which are closed over the entire periphery of the outside and inside surfaces of said collet, respectively, said outside and inside surfaces of said collet contacting closely the inside peripheral surface of said tapered hole and the outside peripheral surface of said tool, respectively along said respective zigzag paths, said collet being contractible radially responsive to the slits of said two sets and said cutting oil supplied to said oil passage adapted to flow out of said collet through said jets toward said tool.

9 more elements

An oil feeding collet having an axis, a collet chuck having a tapered hole in a clamp member, comprising:

(a) a front end base portion having an engage portion connectable to said clamp member in said collet chuck, a main portion, and a rear end base portion, said two base portions and said main portion forming a substantial portion in said collet, said collet having a tapered outside surface closely adaptable in said tapered hole in said collet chuck,
(b) a tool holding hole formed along said axis of said collet,
(c) a first set of axially long radial slits opening at the end surface of said front end base portion and terminating in said rear end base portion,
(d) a second set of axially long radial slits opening at the end surface of said rear end base portion and terminating in said front end base portion,
(e) each of the radial slits of said first set and each of said radial slits of said second set being arranged at proper angular intervals and alternately along the peripheral direction of the collet, respective zigzag paths being formed which are closed over the whole periphery of the outside and inside surfaces of said collet, respectively,
(f) said collet being contractible radially responsive to the radial slits of said two sets to prevent cutting oil from flowing along the outside and inside surfaces of said collet.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/160,719Filed 2 Dec 1993
Priority: JP 5-09554330 Mar 1993
Granted: 11 Apr 1995
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B23B 31/202
Characterized by features relating primarily to remote control of the gripping means: details of the jaws
B23B 31/208
Longitudinally-split sleeves, e.g. collet chucks: with a tool positioning stop
B23B 2231/2021
Operating surfaces of collets, i.e. the surface of the collet acted on by the operating means: comprising two different cones
B23B 2231/2091
Slits of collets: extending from both axial ends of the collet