WO2009028747A1 - Outil de coupe avec vis de serrage inclinée - Google Patents

Outil de coupe avec vis de serrage inclinée Download PDF

Info

Publication number
WO2009028747A1
WO2009028747A1 PCT/KR2007/004180 KR2007004180W WO2009028747A1 WO 2009028747 A1 WO2009028747 A1 WO 2009028747A1 KR 2007004180 W KR2007004180 W KR 2007004180W WO 2009028747 A1 WO2009028747 A1 WO 2009028747A1
Authority
WO
WIPO (PCT)
Prior art keywords
insert
holder
hole
clamping screw
clamping
Prior art date
Application number
PCT/KR2007/004180
Other languages
English (en)
Inventor
Chang-Min Kwak
Original Assignee
Taegutec. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taegutec. Ltd. filed Critical Taegutec. Ltd.
Priority to PCT/KR2007/004180 priority Critical patent/WO2009028747A1/fr
Publication of WO2009028747A1 publication Critical patent/WO2009028747A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/007—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor for internal turning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/16—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped
    • B23B27/1662—Cutting tools of which the bits or tips or cutting inserts are of special material with exchangeable cutting bits or cutting inserts, e.g. able to be clamped with plate-like cutting inserts clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the cutting insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3618—Fixation holes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/04—Fixation screws, bolts or pins of particular form
    • B23B2205/045—Fixation screws, bolts or pins of particular form orientated obliquely to the hole in the insert or to the seating surface

Definitions

  • the present invention relates to a cutting tool, more particularly, to a cutting tool in which an insert can be rotated to change a cutting edge (or cutting corner) of an insert and an insert can be removed without detaching a clamping screw.
  • FIG. 1 is a partial plane view of a conventional cutting tool comprising a holder and an insert mounted to the holder.
  • An insert 1 is fixedly mounted in a pocket portion 2A formed on an upper portion of a holder 2 through a clamping screw 3, an cutting edge or a cutting corner (hereinafter, referred to as "cutting portion") of the insert 1 exposed out of the holder 2 is contacted with a work-piece (not shown) to machine the work-piece.
  • the present invention is conceived to solve the aforementioned problems which can be generated at the time of changing a cutting edge or cutting corner that is worn away into new cutting edge or cutting corner and replacing an insert with new one.
  • An object of the present invention is to provide a cutting tool having a structure in which an insert can be rotated without detaching completely a clamping screw from a holder to correspond the new cutting edge or cutting corner of the insert to a work-piece to be machined and an insert can be removed from a holder without detaching completely a clamping screw from a holder.
  • a cutting tool comprises a holder consisting of a pocket portion having a side surface and a bottom surface and a clamping hole formed below the pocket portion; an insert having cutting portions and a central through hole and mounted on the pocket portion of the holder; and a clamping screw for securing the insert to the holder, the clamping screw including a head portion contacted with an inner circumference surface of the through hole of the insert and a coupling portion passing through the through hole of the insert and coupled with the clamping hole of the holder.
  • the clamping hole of the holder has a central line inclined with an angle with respect to a perpendicular line to the bottom surface of pocket portion
  • the head portion of the clamping screw consists of an upper cylindrical portion and a lower frustum portion
  • the through hole of the insert includes a minimal diametral portion and an upper region having a diameter which gradually increases toward the upper end
  • the diameter of the upper cylindrical portion of the head portion of the clamping screw is smaller than that of the minimal diametral portion of the through hole of the insert, but a length of a horizontal prolate axis of the head portion of the clamp screw which is inclined with the angle is larger than a diameter of the minimal diametral portion.
  • the upper cylindrical portion and the lower frustum portion of the head portion of the clamping screw are simultaneously contacted with the upper region of the inner circumference surface of the through hole of the holder.
  • the through hole of the insert can further include a lower region having a diameter which gradually increases toward the lower end, and the coupling portion of the clamping screw has a length larger than a height of the pocket portion of the holder.
  • the insert can be rotated and correspond new cutting portion (cutting edge or cutting corner) to a work-piece and the insert can be removed from the holder without detaching completely a clamping screw from a holder, and so it is possible to prevent a clamping screw from being lost at the time of changing a cutting portion of an insert and replacing an insert with new one.
  • FIG. 1 is a partial plane view of a conventional cutting tool comprising a holder and an insert mounted to the holder.
  • FIG. 2 is a sectional view of a cutting tool according to the first embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • FIG. 3 is a view illustrating a state where the insert is rotated with respect to the clamping screw and removed from the holder.
  • FIG. 4 is a view illustrating a state where the insert is being removed from the holder.
  • FIG. 5 is a view corresponding to FIG. 2 and shows the cutting tool comprising the clamping screw having a modified shape.
  • FIG. 2 is a sectional view of a cutting tool according to the embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • a cutting tool comprises a holder 20 consisting of a pocket portion 22 having a side surface and a bottom surface and a clamping hole 21 formed below the pocket portion 22; an insert 10 having cutting portions and a central through hole 11 and mounted on the pocket portion 22 of the holder 20; and a clamping screw 30 including a head portion 31 contacted with an inner circumference surface of the through hole 11 of the insert 10 and a coupling portion 32 passing through the through hole 11 of the insert 10 and coupled with the clamping hole 21 of the holder 20.
  • the holder 20 is constituted such that a central line of the clamping hole 21 is inclined with an angle with respect to a perpendicular line to the bottom surface of pocket portion 20.
  • the clamping screw 30 is the member used for securing the insert 10 to the holder
  • the head portion 31 contacted with an inner circumference surface of the through hole 11 of the insert 10 consists of an upper cylindrical portion 31-1 and a lower frustum portion 31-2.
  • the lower frustum portion 31-2 has a diameter which gradually decreases toward a lower end, that is, the coupling portion 32.
  • the insert 10 has the through hole 11 formed at a central portion thereof, the through hole 11 comprises an upper region 11-1, a lower region 11-2 and a minimal diametral portion 11-3 disposed between the upper region 11-1 and the lower region 11-2.
  • the upper region 11-1 has a diameter which gradually increases toward the upper end
  • the lower region 11-2 has a diameter which gradually increases toward the lower end.
  • the diameter (d) of the upper cylindrical portion 31-1 of the head portion 31 of the clamping screw 30 is smaller than a diameter (D) of the minimal diametral portion 11-3 of the through hole 11 of the insert 10.
  • a length (L) of a horizontal prolate axis of the head portion 31 of the clamp screw 30 which is inclined with the angle is larger than a diameter (D) of the minimal diametral portion 11-3 of the through hole 11 of the insert 10.
  • the through hole 11 of the insert 10 includes a lower region 11-2 having a diameter which is gradually increased toward a lower end to prevent the coupling portion 32 of the clamping screw 30 from being interfered with an inner circumference surface of the through hole 11 of the insert 10.
  • FIG. 3 is a view illustrating a state where the insert is rotated with respect to the clamping screw and removed from the holder, once the user rotates reversely the clamping screw 30, the clamping screw 30 is moved inclinedly and upward. At this time, the head portion 31 of the clamping screw 30 is moved out of the through hole 11 of the insert 10, while a lower portion is screw-coupled with the a clamping hole 21 of the holder 20.
  • the clamping screw 30 is rotated to re-mount the insert 10 on the holder 20.
  • FIG. 4 is a view illustrating a state where the insert is being removed from the holder.
  • a shape of the clamping screw 30 constituting the cutting tool according to the present invention may be modified into a shape shown in FIG. 5
  • FIG. 5 is a view corresponding to FIG. 2 and shows the cutting tool comprising the clamping screw having a modified shape. Therefore, the lower frustum portion 131-1 constituting a head portion 131 of a clamping screw 130 in the present invention is defined to include a variation having rounded convex surface as shown in FIG. 5.
  • the present invention is applicable to a cutting tool in which an insert can be rotated to change a cutting edge (or cutting corner) of an insert and an insert can be removed without detaching a clamping screw.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Milling Processes (AREA)

Abstract

La présente invention concerne un outil de coupe ayant une structure selon laquelle un insert peut être amené à tourner sans complètement détacher une vis de serrage d'un organe de retenue pour faire correspondre la nouvelle arête de coupe ou angle de coupe de l'insert à une pièce à travailler devant être usinée, et un insert peut être retiré d'un organe de retenue sans complètement détacher une vis de serrage d'un organe de retenue. Un outil de coupe selon la présente invention comprend un organe de retenue consistant en une partie de logement comportant des surfaces latérale et inférieure et un trou de serrage formé au dessous de la partie de logement ; un insert comportant des parties de coupe et un trou traversant central et monté sur la partie de logement de l'organe de retenue ; et une vis de serrage pour fixer l'insert à l'organe de retenue, la vis de serrage comprenant une partie de tête amenée à être en contact avec une surface périphérique interne du trou traversant de l'insert et une partie d'accouplement passant à travers le trou traversant de l'insert et couplée avec le trou de serrage de l'organe de retenue. Ici, le trou de serrage de l'organe de retenue a une ligne centrale inclinée à un angle par rapport à une ligne perpendiculaire à la surface inférieure de la partie de logement, la partie de tête de la vis de serrage consiste en une partie cylindrique supérieure et en une partie conique inférieure, le trou traversant de l'insert comprend une partie de diamètre minimal et une région supérieure ayant un diamètre qui augmente progressivement en direction de l'extrémité supérieure, et le diamètre de la partie cylindrique supérieure de la partie de tête de la vis de serrage est plus petit que celui de la partie de diamètre minimal du trou traversant de l'insert, mais une longueur d'un axe allongé horizontal de la partie de tête de la vis de serrage qui est inclinée à l'angle est plus grande qu'un diamètre de la partie de diamètre minimal.
PCT/KR2007/004180 2007-08-30 2007-08-30 Outil de coupe avec vis de serrage inclinée WO2009028747A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/004180 WO2009028747A1 (fr) 2007-08-30 2007-08-30 Outil de coupe avec vis de serrage inclinée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/004180 WO2009028747A1 (fr) 2007-08-30 2007-08-30 Outil de coupe avec vis de serrage inclinée

Publications (1)

Publication Number Publication Date
WO2009028747A1 true WO2009028747A1 (fr) 2009-03-05

Family

ID=40387441

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2007/004180 WO2009028747A1 (fr) 2007-08-30 2007-08-30 Outil de coupe avec vis de serrage inclinée

Country Status (1)

Country Link
WO (1) WO2009028747A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016174663A1 (fr) * 2015-04-30 2016-11-03 No Screw Ltd. Mécanisme de serrage dynamique
USRE46858E1 (en) 2009-02-27 2018-05-22 No Screw Ltd. Cutting tool, cutting tool holder and cutting insert therefor
US10307833B2 (en) 2015-02-04 2019-06-04 No Screw Ltd. Cutting tool comprising a cutting tool holder and a cutting insert therefor
US10500647B2 (en) 2013-09-03 2019-12-10 No Screw Ltd. Mounting mechanism for a cutting insert, a cutting insert therefor and a cutting tool using said insert

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913197A (en) * 1973-11-19 1975-10-21 Heinz K Wolf Positive lock insert
US4398853A (en) * 1980-11-10 1983-08-16 Kennametal Inc. Insert holder and method of holding
US4615650A (en) * 1985-10-15 1986-10-07 Gte Valeron Corporation Locking pin for a tool holder
US6155754A (en) * 1995-02-27 2000-12-05 Sandvik Ab Fastening arrangement for cutting inserts
US6579042B1 (en) * 2000-10-11 2003-06-17 Sandvik Inc. Cutter body with cutting inserts and methods for assembling same
US20040223818A1 (en) * 2003-05-09 2004-11-11 Sheffler Glenn W. Cutting insert with elliptical cutting edge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913197A (en) * 1973-11-19 1975-10-21 Heinz K Wolf Positive lock insert
US4398853A (en) * 1980-11-10 1983-08-16 Kennametal Inc. Insert holder and method of holding
US4615650A (en) * 1985-10-15 1986-10-07 Gte Valeron Corporation Locking pin for a tool holder
US6155754A (en) * 1995-02-27 2000-12-05 Sandvik Ab Fastening arrangement for cutting inserts
US6579042B1 (en) * 2000-10-11 2003-06-17 Sandvik Inc. Cutter body with cutting inserts and methods for assembling same
US20040223818A1 (en) * 2003-05-09 2004-11-11 Sheffler Glenn W. Cutting insert with elliptical cutting edge

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE46858E1 (en) 2009-02-27 2018-05-22 No Screw Ltd. Cutting tool, cutting tool holder and cutting insert therefor
US10500647B2 (en) 2013-09-03 2019-12-10 No Screw Ltd. Mounting mechanism for a cutting insert, a cutting insert therefor and a cutting tool using said insert
US10307833B2 (en) 2015-02-04 2019-06-04 No Screw Ltd. Cutting tool comprising a cutting tool holder and a cutting insert therefor
WO2016174663A1 (fr) * 2015-04-30 2016-11-03 No Screw Ltd. Mécanisme de serrage dynamique
US10307832B2 (en) 2015-04-30 2019-06-04 No Screw Ltd. Dynamic clamping mechanism

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