WO2009028744A1 - Cutting tool having a structure for easy rotation of insert - Google Patents

Cutting tool having a structure for easy rotation of insert Download PDF

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Publication number
WO2009028744A1
WO2009028744A1 PCT/KR2007/004129 KR2007004129W WO2009028744A1 WO 2009028744 A1 WO2009028744 A1 WO 2009028744A1 KR 2007004129 W KR2007004129 W KR 2007004129W WO 2009028744 A1 WO2009028744 A1 WO 2009028744A1
Authority
WO
WIPO (PCT)
Prior art keywords
holder
insert
hole
thread portion
clamping
Prior art date
Application number
PCT/KR2007/004129
Other languages
French (fr)
Inventor
Kang-Sool Jung
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/KR2007/004129 priority Critical patent/WO2009028744A1/en
Publication of WO2009028744A1 publication Critical patent/WO2009028744A1/en

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
    • B23B27/14—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
    • B23B27/1614—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 of special shape clamped against the walls of the recess in the shank by a clamping member acting upon the wall of a hole in the insert
    • 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
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/04—Fixation screws, bolts or pins of particular form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2260/00—Details of constructional elements
    • B23B2260/138—Screw threads

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 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 when changing a cutting edge or cutting corner that is worn away into new cutting edge or cutting corner of the insert.
  • 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.
  • 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 a plurality of cutting edges 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, wherein one of an inner circumference of the clamping hole of the holder and the coupling portion of the coupling screw is provided with an upper thread portion and a lower thread portion spaced apart from each other by an region on which threads are not formed, while the other one is provided with one thread portion couplable with the upper thread portion and the lower thread portion.
  • the upper and lower thread portions are formed on an inner circumference surface of the clamping hole of the holder and spaced apart from each other and the one thread portion is formed on a lower portion of the coupling portion of the coupling screw.
  • the thread portion of the clamping screw has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping hole of the holder and the upper thread portion has a length shorter than that of the lower thread portion and the lower thread portion has a length longer than that height of the pocket portion.
  • the upper and lower thread portions may be formed on the clamping screw and spaced apart from each other, and the one thread portion may be formed on an upper portion of an inner circumference surface of the clamping hole of the holder.
  • the thread portion formed on the clamping hole of the holder has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping screw and the upper thread portion has a length longer than that of the lower thread portion and the upper thread portion has a length longer than that height of the pocket portion.
  • the insert can be rotated and correspond a new cutting portion (cutting edge or cutting corner) to a work-piece without detaching completely a clamping screw from a holder, and so it is possible to prevent a clamping screw from being lost when changing a cutting portion of an insert.
  • 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 sectional view of a cutting tool according to the second embodiment of the present invention having another structure and corresponds to the view taken along the line A-A in FIG. 1.
  • FIG. 4 is a sectional view of a cutting tool according to the third embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • FIG. 32 FIG.
  • FIG. 5 is a sectional perspective view for showing a structure of a securing member shown in FIG. 4.
  • FIG. 6 is a sectional view of a cutting tool according to the fourth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • FIG. 7 is a sectional view of a cutting tool according to the fifth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1. [35]
  • 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.
  • the clamping screw 30 comprises a head portion 31 contacted with a circumference surface of a 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 clamping hole 21 comprises a first thread portion 21-1 (an upper thread portion) formed on an upper region of the inner circumference surface thereof and a second thread portion 21-2 (a lower thread portion) formed on a lower region thereof.
  • one thread portion 32-1 is formed on a lower portion of the coupling portion 32 of the clamping screw 30.
  • the thread portion 32-1 formed on a lower portion of the coupling portion 32 of the clamping screw 30 is screw-coupled with the first thread portion 21-1 formed on the upper region of the clamping hole 21 of the holder 20.
  • a screw-couple between the first thread portion 21-1 of the clamping hole 21 of the holder 20 and the thread portion 32-1 of the coupling portion 32 of the clamping screw 30 becomes released, the thread portion 32-1 of the clamping screw 30 is then screw-coupled to the second thread portion 21-2 formed on a lower region of the clamping hole 21 of the holder 20 (a state of FIG. 2).
  • the clamping screw 30 can be rotated freely in the clamping hole 21 of the holder 20 and the insert 10 can be released from the pocket portion 22. Accordingly, the user can rotate the insert 10 about the clamping screw 30 to correspond new cutting portion of the insert 10 to the work-piece.
  • the first thread portion 21-1 formed in the clamping hole 21 of the holder 20 has a length (height) shorter than that of the second thread portion 21-1 and a length of the thread portion 32-1 of the clamping screw 30 should be shorter than a distance between the first thread portion 21-1 and the second thread portion 21-2 of the clamping hole 21 of the holder 20.
  • the length of the second thread portion 21-2 formed on the clamping hole 21 of the holder 20 is larger than a thickness (height) of the insert 10 or the height of the pocket portion 22 for escaping entirely the head portion 31 of the clamping screw 30 out of the through hole 11 of the insert 10 when the clamping screw 30 is freely moved (or rotated) in the clamping hole 21 of the holder 20.
  • FIG. 3 is a sectional view of a cutting tool according to the second embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • the cutting tool according to the second embodiment of the present invention comprises a holder 120 having a pocket portion 122 formed on an upper portion thereof and a clamping hole 121 formed below the pocket portion 122; an insert 110 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 122 of the holder 120; and a clamping screw 130 for securing the insert 110 to the holder 120.
  • the clamping screw 130 comprises a head portion 131 contacted with a circumference surface of a through hole 111 of the insert 110 and a coupling portion 132 passing through the through hole 111 of the insert 110 and coupled with the clamping hole 121 of the holder 120.
  • the coupling portion 132 of the clamping screw 130 comprises a first thread portion 132-1 (an upper thread portion) formed on an upper region thereof and a second thread portion 132-2 (a lower thread portion) formed on a lower region thereof.
  • one thread portion 121-1 is formed on an upper portion of an inner circumference surface of the clamping hole 121 of the holder 120.
  • the second thread portion 132-2 formed on a lower region of the coupling portion 132 of the clamping screw 130 is screw-coupled with the thread portion 121-1 formed on the upper portion of the clamping hole 121 of the holder 120.
  • a screw-couple between the thread portion 121-1 of the clamping hole 21 of the holder 20 and the second thread portion 132-2 of the clamping screw 130 becomes released and the first thread portion 132-1 formed on the upper region of the coupling portion 132 of the clamping screw 130 is then screw- coupled to the thread portion 121-1 of the clamping hole 121 of the holder 120 (a state of FIG. 3).
  • the clamping screw 130 can be rotated freely in the clamping hole 121 of the holder 120 and the inset 110 can be released fro the pocket portion 122. Accordingly, the user can rotate the insert 110 about the clamping screw 130 to correspond new cutting portion of the insert 110 to the work-piece.
  • the second thread portion 132-2 formed on the coupling portion 132 of the clamping screw 130 has a length (height) shorter than that of the first thread portion 132-1.
  • a length of the first thread portion 132- 1 of the clamping screw 130 is larger than a thickness (height) of the insert 110 or a height of the pocket portion 122 for escaping entirely the head portion 131 of the clamping screw 130 out of the through hole 111 of the insert 110 when the clamping screw 130 is freely moved (or rotated) in the clamping hole 121 of the holder 120.
  • FIG. 4 is a sectional view of a cutting tool according to the third embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • the cutting tool according to the third embodiment of the present invention comprises a holder 220 having a pocket portion 222 formed on an upper portion thereof and a clamping hole 221 formed below the pocket portion 222; a seat 250 having a central hole and placed on the pocket portion 222 of the holder 220; a securing member 240 having a cylindrical shape and having a head portion contacted with the inner wall of the central hole of the seat 250, an outer circumference portion coupled with an inner circumference surface of the clamping hole 221 of the holder 220, and an inner circumference surface on which a coupling portion is formed; an insert 210 having a plurality of cutting portion edges and a through hole and placed on the seat 250; and a clamping screw 230 comprising a head portion 231 contacted with a circumference surface of a through hole 211 of the insert 210 and a coupling portion 232 passing through the through hole 211 of the insert 210 and coupled with the securing member 240 provided in the clamping hole 221 of the holder 2
  • the securing member 240 has the function to secure a seat 250 into the pocket portion 222 of the holder 220and is secured in the clamping hole 221 of the holder 220 by a screw-coupling between a thread portion formed on an outer circumference surface thereof and a thread portion formed on an inner circumference of the clamping hole 221 of the holder 220.
  • FIG. 5 is a sectional view for illustrating the structure of the securing member 240 shown in FIG 4 and shows that a first thread portion 240- 1 (an upper thread portion) and a second thread portion 240-2 (a lower thread portion) are formed on an upper region and a lower region of an inner circumference surface of the securing member 240, respectively, and also a thread portion is formed over the outer circumference surface.
  • the clamping screw 230 comprises a first thread portion 232-1 (an upper thread portion) formed on an upper region of the coupling portion 232 and a second thread portion 232-2 (a lower thread portion) formed on a lower region of the coupling portion 232.
  • a process for securing the insert 210 to the holder 220 is the same as the processes for securing the inserts 10 and 110 to the holder 20 and 120 in the first and second embodiments, and so the detailed description thereon is omitted.
  • the clamping screw 230 can be rotated freely in the securing member 240 and the insert 210 can be released from the pocket portion 222. Accordingly, the user can rotate the insert 210 about the clamping screw 230 to correspond new cutting portion of the insert 210 to the work-piece.
  • the user rotates the clamping screw 230 to screw-couple the first and second thread portions 232-1 and 232-2 of the clamping screw 230 to the first and second thread portions 240-1 and 240-2 formed on the inner circumference surfaces of the securing member 240, and so the insert 210 is re-mounted completely on the holder 220.
  • the first thread portion 232-1 of the clamping screw 230 preventing a complete removal of the clamping screw 230 from the holder 220 has a length (height) shorter than that of the second thread portion 232-2 and the first thread portion 240- 1 formed on an upper region of the securing member 240 has a length (height) shorter than that of the second thread portion 240-2.
  • a distance between the first and second thread portions 240- 1 and 240-2 of the securing member 240 is larger than a thickness (height) of the insert 210 for escaping entirely the head portion 231 of the clamping screw 230 out of the through hole 211 of the insert 210 when a screw-coupling between the second thread portion 232-2 of the clamping screw 230 and the second thread portion 240-2 of the securing member 240 is released, that is, when the clamping screw 230 can be rotated freely in the securing member 240.
  • FIG. 6 is a sectional view of a cutting tool according to the fourth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • the cutting tool according to the third embodiment of the present invention comprises a holder 320 having a pocket portion 322 formed on an upper portion thereof and a clamping hole 321 formed below the pocket portion 322; a hollow intermediate member 340 provided fixedly in the clamping hole 321 of the holder 320; an insert 310 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 322 of the holder 320; and a clamping screw 330 comprising a head portion 331 contacted with a circumference surface of a through hole 311 of the insert 310 and a coupling portion 332 passing through the through hole 311 of the insert 310 and coupled with the intermediate member 340 provided in the clamping hole 321 of the holder 320 for securing the insert 310 to the holder 320.
  • a construction and function of each of the members constituting the cutting tool according to this embodiment are similar to those of the members constituting the cutting tool according to the third embodiment. In this embodiment, however, there is a difference that the intermediate member 340 does not have function to secure the seat. In addition, the intermediate member 340 may be secured to the clamping hole 321 in a press fit manner.
  • a feature of the cutting tool according to this embodiment is that the intermediate member 340 provided fixedly in the clamping hole 321 of the holder 320 is a hollow member having an opened upper and a closed lower end and an elastic member 350 (for example, spring) may be provided between a bottom surface of the intermediate member 340 and a lower surface of the insert 310.
  • an elastic member 350 for example, spring
  • FIG. 7 is a sectional view of a cutting tool according to the fifth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
  • the cutting tool according to the third embodiment of the present invention comprises a holder 420 having a pocket portion 422 formed on an upper portion thereof and a clamping hole 421 formed below the pocket portion 422; an insert 410 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 422 of the holder 420; a clamping screw 430 comprising a head portion 431 contacted with a circumference surface of a through hole 411 of the insert 410 and a coupling portion 432 passing through the through hole 411 of the insert 410 and coupled with the clamping hole 421 of the holder 420 for securing the insert 410 to the holder 420; and a cylindrical stopper member 440 provided between an inner circumference surface of the clamping hole 421 of the holder 420 and an outer circumference surface of the coupling portion 432 of the clamping screw 430.
  • a thread portion 421-1 is formed on a lower portion of the inner circumference of the clamping hole 421 of the holder 420 and a thread portion 432-1 is formed on a lower portion of the coupling portion 432 of the clamping screw 430.
  • the hollow cylindrical stopper member 440 is placed on an upper region of the clamping hole 421 of the holder 420, an upper region (that is, a region on which the thread portion 423-1 is not formed) of the coupling portion 432 of the clamping screw 430 is received in the stopper member 440.
  • the stopper member 440 can be provided securely in the clamping hole 421 of the holder 420 in a press-fit manner.
  • a protrusion portion 441 are formed on an inner circumference of an upper end portion of the cylindrical stopper member 440 and extended to a center in a radial direction, and this protrusion portion 441 may be contacted with the thread portion 432- 1 formed on the coupling portion 432 of the clamping screw 430.
  • the protrusion portion 411 can be a protruded ring member extended from an inner circumference of an upper end portion of the cylindrical stopper member 440.
  • a thread portion may be formed on an inner circumference surface of the protrusion portion 441.
  • the above description illustrate that the cutting tool according to the fourth embodiment shown in FIG. 6 has the structure in which a lower end of the securing member 340 is closed and the elastic member 350 is provided between a bottom face of the securing member 340 and a lower face of clamping screw 330.
  • the above structure can be applied to the cutting tools of the first and second embodiments.
  • the holder 20 or 120 in which the clamping hole 21 or 121 having a closed lower end is formed can be mounted in the cutting tool of the first or second embodiment, and the elastic member can be provided between a bottom face of the clamping hole 21 or 121 and a lower face of the clamping screw 30 or 130.
  • the insert can be rotated and correspond a new cutting portion (cutting edge or cutting corner) to a work-piece without detaching completely a clamping screw from a holder, and so it is possible to prevent a clamping screw from being lost when changing a cutting portion of an insert.

Abstract

The present invention discloses 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. A cutting tool according to the present invention 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 a plurality of cutting edges 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, wherein one of an inner circumference of the clamping hole of the holder and the coupling portion of the coupling screw is provided with an upper thread portion and a lower thread portion spaced apart from each other by an region on which threads are not formed, while the other one is provided with one thread portion couplable with the upper thread portion and the lower thread portion.

Description

Description
CUTTING TOOL HAVING A STRUCTURE FOR EASY
ROTATION OF INSERT
Technical Field
[I] 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 without detaching a clamping screw.
[2]
Background Art [3] In general, a machining tool comprises a holder and a cutting insert fixed to a pocket portion of the holder through a clamping means and contacted with a work-piece. [4] [5] FIG. 1 is a partial plane view of a conventional cutting tool comprising a holder and an insert mounted to the holder. [6] [7] 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. [8] [9] As the machining process is performed, the cutting portion of the insert 1 is worn away so that the insert 1 can not machine accurately the work-piece. Accordingly, the user should rotate the insert 1 with respect to the holder 2 to make new cutting portion of the insert 1 correspond to the work-piece. [10]
[I I] To rotate the insert and correspond new cutting portion of the insert 1 to the work- piece, the user detaches completely the clamping screw 2 from the holder 2 and removes the insert 1 from the pocket portion 2A of the holder 2. Then, the user fixes the insert 1 to the holder 2 by means of the clamping screw 3 so that new cutting portion of the insert 1 is protruded out of the holder 2.
[12] There are problems that theses processes for detaching the insert from the holder and re-mounting the insert to the holder are complicated, much time for performing the processes is required and the user might lose the clamping screw detached from the holder during the processes.
[13]
Disclosure of Invention Technical Problem
[14] The present invention is conceived to solve the aforementioned problems which can be generated when changing a cutting edge or cutting corner that is worn away into new cutting edge or cutting corner of the insert. 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.
[15]
Technical Solution
[16] A cutting tool according to the present invention 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 a plurality of cutting edges 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, wherein one of an inner circumference of the clamping hole of the holder and the coupling portion of the coupling screw is provided with an upper thread portion and a lower thread portion spaced apart from each other by an region on which threads are not formed, while the other one is provided with one thread portion couplable with the upper thread portion and the lower thread portion.
[17]
[18] Here, the upper and lower thread portions are formed on an inner circumference surface of the clamping hole of the holder and spaced apart from each other and the one thread portion is formed on a lower portion of the coupling portion of the coupling screw.
[19]
[20] At this time, it is preferable that the thread portion of the clamping screw has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping hole of the holder and the upper thread portion has a length shorter than that of the lower thread portion and the lower thread portion has a length longer than that height of the pocket portion.
[21]
[22] On the other hand, the upper and lower thread portions may be formed on the clamping screw and spaced apart from each other, and the one thread portion may be formed on an upper portion of an inner circumference surface of the clamping hole of the holder. [24] In the above structure, it is preferable that the thread portion formed on the clamping hole of the holder has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping screw and the upper thread portion has a length longer than that of the lower thread portion and the upper thread portion has a length longer than that height of the pocket portion.
[25]
Advantageous Effects
[26] In the cutting tool according to the present invention having the structure and function as described above, the insert can be rotated and correspond a new cutting portion (cutting edge or cutting corner) to a work-piece without detaching completely a clamping screw from a holder, and so it is possible to prevent a clamping screw from being lost when changing a cutting portion of an insert. [27]
Brief Description of the Drawings [28] FIG. 1 is a partial plane view of a conventional cutting tool comprising a holder and an insert mounted to the holder. [29] 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. [30] FIG. 3 is a sectional view of a cutting tool according to the second embodiment of the present invention having another structure and corresponds to the view taken along the line A-A in FIG. 1. [31] FIG. 4 is a sectional view of a cutting tool according to the third embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1. [32] FIG. 5 is a sectional perspective view for showing a structure of a securing member shown in FIG. 4. [33] FIG. 6 is a sectional view of a cutting tool according to the fourth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1. [34] FIG. 7 is a sectional view of a cutting tool according to the fifth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1. [35]
Best Mode for Carrying Out the Invention [36] Hereinafter, a cutting tool according to the embodiment of the present invention is described in detail with reference with the accompanying drawings. [37]
[38] First embodiment
[39] 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.
[40]
[41] A cutting tool according to the first embodiment of the present invention comprises a holder 20 having a pocket portion 22 formed on an upper portion thereof and a clamping hole 21 formed below a bottom surface of the pocket portion 22; an insert 10 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 22 of the holder 20; and a clamping screw 30 for securing the insert 10 to the holder 20.
[42]
[43] The clamping screw 30 comprises a head portion 31 contacted with a circumference surface of a 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.
[44]
[45] Two thread portions spaced apart from each other are formed on an inner circumference surface of the clamping hole 21 of the holder 20. That is, the clamping hole 21 comprises a first thread portion 21-1 (an upper thread portion) formed on an upper region of the inner circumference surface thereof and a second thread portion 21-2 (a lower thread portion) formed on a lower region thereof.
[46]
[47] In addition, one thread portion 32-1 is formed on a lower portion of the coupling portion 32 of the clamping screw 30.
[48]
[49] In the cutting tool having the structure as described above, a process for securing the insert 10 to the holder 20 is described as follows.
[50]
[51] After the coupling portion 32 of the clamping screw 30 passes through the through hole 11 of the insert 10, the thread portion 32-1 formed on a lower portion of the coupling portion 32 of the clamping screw 30 is screw-coupled with the first thread portion 21-1 formed on the upper region of the clamping hole 21 of the holder 20. As the clamping screw 30 rotates further, a screw-couple between the first thread portion 21-1 of the clamping hole 21 of the holder 20 and the thread portion 32-1 of the coupling portion 32 of the clamping screw 30 becomes released, the thread portion 32-1 of the clamping screw 30 is then screw-coupled to the second thread portion 21-2 formed on a lower region of the clamping hole 21 of the holder 20 (a state of FIG. 2).
[52]
[53] In the state of FIG. 2, the head portion 31 of the clamping screw 30 is contacted with the circumference surface of the through hole 11 of the insert 10, so the insert 10 is securely fixed to the holder 20 through the clamping screw 30. In this state, the cutting portion of the insert 10 exposed out of the holder 20 is contacted with the work-piece (not shown) to cut the work-piece.
[54]
[55] A process for rotating the insert 10 on the holder 20 for changing the cutting portion which is worn away is described as follows.
[56]
[57] Once the user rotates reversely the clamping screw 30, a screw-couple between the thread portion 32- 1 formed on a lower portion of the coupling portion 32 of the clamping screw 30 and the second thread portion 21-2 formed on a lower region of the clamping hole 21 of the holder 20 becomes released. In this state, since the clamping screw 30 is not screw-coupled with the clamping hole 21 of the holder 20, the clamping screw 30 can be moved within a limited range.
[58]
[59] In this state, the clamping screw 30 can be rotated freely in the clamping hole 21 of the holder 20 and the insert 10 can be released from the pocket portion 22. Accordingly, the user can rotate the insert 10 about the clamping screw 30 to correspond new cutting portion of the insert 10 to the work-piece.
[60]
[61] After new cutting portion of the insert 10 is set for machining the work-piece, the user rotates the clamping screw 30 to screw-couple the thread portion 32- 1 of the clamping screw 30 to the second thread portion 21-2 formed on the lower region of the clamping hole 21 of the holder 20, and so the insert 10 is re-mounted completely on the holder 20.
[62]
[63] As described above, there is no need to remove entirely the clamping screw 30 from the holder 20 for corresponding new cutting portion of the insert 10 to the work-piece. In particular, if the thread portion 32- 1 of the clamping screw 30 is not screw-coupled with the first thread portion 21-1 of the clamping hole 21 of the holder 20, the clamping screw 30 is not moved upward excessively, and so it is possible to prevent the clamping screw 30 from being separated from the holder 20 or lost.
[64]
[65] Here, it is preferred that the first thread portion 21-1 formed in the clamping hole 21 of the holder 20 has a length (height) shorter than that of the second thread portion 21-1 and a length of the thread portion 32-1 of the clamping screw 30 should be shorter than a distance between the first thread portion 21-1 and the second thread portion 21-2 of the clamping hole 21 of the holder 20.
[66] [67] In addition, it is desirable that the length of the second thread portion 21-2 formed on the clamping hole 21 of the holder 20 is larger than a thickness (height) of the insert 10 or the height of the pocket portion 22 for escaping entirely the head portion 31 of the clamping screw 30 out of the through hole 11 of the insert 10 when the clamping screw 30 is freely moved (or rotated) in the clamping hole 21 of the holder 20.
[68]
[69] Second embodiment
[70] FIG. 3 is a sectional view of a cutting tool according to the second embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
[71]
[72] Like the cutting tool according to the first embodiment, the cutting tool according to the second embodiment of the present invention comprises a holder 120 having a pocket portion 122 formed on an upper portion thereof and a clamping hole 121 formed below the pocket portion 122; an insert 110 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 122 of the holder 120; and a clamping screw 130 for securing the insert 110 to the holder 120.
[73]
[74] The clamping screw 130 comprises a head portion 131 contacted with a circumference surface of a through hole 111 of the insert 110 and a coupling portion 132 passing through the through hole 111 of the insert 110 and coupled with the clamping hole 121 of the holder 120.
[75]
[76] Two thread portions spaced apart from each other are formed on the coupling portion
132 of the clamping screw 130. That is, the coupling portion 132 of the clamping screw 130 comprises a first thread portion 132-1 (an upper thread portion) formed on an upper region thereof and a second thread portion 132-2 (a lower thread portion) formed on a lower region thereof.
[77]
[78] In addition, one thread portion 121-1 is formed on an upper portion of an inner circumference surface of the clamping hole 121 of the holder 120.
[79]
[80] In the cutting tool having the structure as described above, a process for securing the insert 110 to the holder 120 is described as follows.
[81]
[82] After the coupling portion 132 of the clamping screw 130 passes through the through hole 111 of the insert 110, the second thread portion 132-2 formed on a lower region of the coupling portion 132 of the clamping screw 130 is screw-coupled with the thread portion 121-1 formed on the upper portion of the clamping hole 121 of the holder 120. As the clamping screw 130 rotates further, a screw-couple between the thread portion 121-1 of the clamping hole 21 of the holder 20 and the second thread portion 132-2 of the clamping screw 130 becomes released and the first thread portion 132-1 formed on the upper region of the coupling portion 132 of the clamping screw 130 is then screw- coupled to the thread portion 121-1 of the clamping hole 121 of the holder 120 (a state of FIG. 3).
[83]
[84] In the state of FIG. 3, the head portion 131 of the clamping screw 130 is contacted with the circumference surface of the through hole 111 of the insert 110, so the insert 110 is securely fixed to the holder 120 through the clamping screw 130. In this state, the cutting portion of the insert 110 exposed out of the holder 120 is contacted with the work-piece (not shown) to cut the work-piece.
[85]
[86] A process for rotating the insert 110 on the holder 120 for changing the cutting portion which is worn away is described as follows.
[87]
[88] Once the user rotates reversely the clamping screw 130, a screw-couple between the first thread portion 132-1 formed on an upper portion of the coupling portion 132 of the clamping screw 130 and the thread portion 121-1 formed on an upper region of the clamping hole 121 of the holder 120 becomes released. In this state, since the clamping screw 130 is not screw-coupled with the clamping hole 121 of the holder 120, the clamping screw 130 can be moved freely within a limited range.
[89]
[90] In this state, the clamping screw 130 can be rotated freely in the clamping hole 121 of the holder 120 and the inset 110 can be released fro the pocket portion 122. Accordingly, the user can rotate the insert 110 about the clamping screw 130 to correspond new cutting portion of the insert 110 to the work-piece.
[91]
[92] After new cutting portion of the insert 110 is set for machining the work-piece, the user rotates the clamping screw 130 to screw-couple the first thread portion 132-1 of the clamping screw 130 to the thread portion 121-1 formed on the upper region of the clamping hole 121 of the holder 120, and so the insert 110 is re-mounted completely on the holder 120.
[93]
[94] As described above, there is no need to remove entirely the clamping screw 130 from the holder 120 for corresponding new cutting portion of the insert 110 to the work- piece. In particular, if the second thread portion 132-2 of the clamping screw 130 is not screw-coupled with the thread portion 121-1 of the clamping hole 121 of the holder 120, the clamping screw 130 is not moved upward excessively, and so it is possible to prevent the clamping screw 130 from being separated from the holder 120 or lost.
[95]
[96] Here, it is preferred that the second thread portion 132-2 formed on the coupling portion 132 of the clamping screw 130 has a length (height) shorter than that of the first thread portion 132-1.
[97]
[98] In addition, it is desirable that a length of the first thread portion 132- 1 of the clamping screw 130 is larger than a thickness (height) of the insert 110 or a height of the pocket portion 122 for escaping entirely the head portion 131 of the clamping screw 130 out of the through hole 111 of the insert 110 when the clamping screw 130 is freely moved (or rotated) in the clamping hole 121 of the holder 120.
[99]
[100] Third embodiment
[101] FIG. 4 is a sectional view of a cutting tool according to the third embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
[102]
[103] The cutting tool according to the third embodiment of the present invention comprises a holder 220 having a pocket portion 222 formed on an upper portion thereof and a clamping hole 221 formed below the pocket portion 222; a seat 250 having a central hole and placed on the pocket portion 222 of the holder 220; a securing member 240 having a cylindrical shape and having a head portion contacted with the inner wall of the central hole of the seat 250, an outer circumference portion coupled with an inner circumference surface of the clamping hole 221 of the holder 220, and an inner circumference surface on which a coupling portion is formed; an insert 210 having a plurality of cutting portion edges and a through hole and placed on the seat 250; and a clamping screw 230 comprising a head portion 231 contacted with a circumference surface of a through hole 211 of the insert 210 and a coupling portion 232 passing through the through hole 211 of the insert 210 and coupled with the securing member 240 provided in the clamping hole 221 of the holder 220 for securing the insert 210 to the holder 220.
[104]
[105] In the meantime, the securing member 240 has the function to secure a seat 250 into the pocket portion 222 of the holder 220and is secured in the clamping hole 221 of the holder 220 by a screw-coupling between a thread portion formed on an outer circumference surface thereof and a thread portion formed on an inner circumference of the clamping hole 221 of the holder 220.
[106] [107] As shown in FIG. 4, a plurality of thread portions spaced from each other are formed on each of an inner circumference surface of the securing member 240 and the coupling portion 232 of the clamping screw 230.
[108]
[109] FIG. 5 is a sectional view for illustrating the structure of the securing member 240 shown in FIG 4 and shows that a first thread portion 240- 1 (an upper thread portion) and a second thread portion 240-2 (a lower thread portion) are formed on an upper region and a lower region of an inner circumference surface of the securing member 240, respectively, and also a thread portion is formed over the outer circumference surface.
[HO]
[111] On the other hand, the clamping screw 230 comprises a first thread portion 232-1 (an upper thread portion) formed on an upper region of the coupling portion 232 and a second thread portion 232-2 (a lower thread portion) formed on a lower region of the coupling portion 232.
[112]
[113] In the cutting tool having the structure as described above, a process for securing the insert 210 to the holder 220 is the same as the processes for securing the inserts 10 and 110 to the holder 20 and 120 in the first and second embodiments, and so the detailed description thereon is omitted.
[114]
[115] A process for rotating the insert 210 on the holder 220 for changing the cutting portion which is worn away is described as follows.
[116]
[117] In a state of FIG. 4, once the user rotates reversely the clamping screw 230, a screw- couple between the first thread portion 232- 1 formed on an upper region of the coupling portion 232 of the clamping screw 230 and the first thread portion 240- 1 formed on an upper portion of the securing member 240 fixed in the clamping hole 221 of the holder 220 and a screw-couple between the second thread portion 232-2 of the clamping screw 230 and the second thread portion 240-2 of the securing member 240 become released.
[118]
[119] At this time, since the clamping screw 230 is not screw-coupled with the inner circumference surface of the securing member 240, the clamping screw 230 can be moved freely within a limited range.
[120]
[121] In this state, the clamping screw 230 can be rotated freely in the securing member 240 and the insert 210 can be released from the pocket portion 222. Accordingly, the user can rotate the insert 210 about the clamping screw 230 to correspond new cutting portion of the insert 210 to the work-piece.
[122]
[123] After new cutting portion of the insert 210 is set for machining the work-piece, the user rotates the clamping screw 230 to screw-couple the first and second thread portions 232-1 and 232-2 of the clamping screw 230 to the first and second thread portions 240-1 and 240-2 formed on the inner circumference surfaces of the securing member 240, and so the insert 210 is re-mounted completely on the holder 220.
[124]
[125] As described above, there is no need to remove entirely the clamping screw 230 from the holder 220 for corresponding new cutting portion of the insert 210 to the work- piece. In particular, if the second thread portion 232-2 of the clamping screw 230 is not screw-coupled with the first thread portion 240-1 of the securing member 240, the clamping screw 230 is not moved upward excessively, and so it is possible to prevent the clamping screw 230 from being separated from the holder 220 or lost.
[126]
[127] Here, it is preferred that the first thread portion 232-1 of the clamping screw 230 preventing a complete removal of the clamping screw 230 from the holder 220 has a length (height) shorter than that of the second thread portion 232-2 and the first thread portion 240- 1 formed on an upper region of the securing member 240 has a length (height) shorter than that of the second thread portion 240-2.
[128]
[129] In addition, it is desirable that a distance between the first and second thread portions 240- 1 and 240-2 of the securing member 240 is larger than a thickness (height) of the insert 210 for escaping entirely the head portion 231 of the clamping screw 230 out of the through hole 211 of the insert 210 when a screw-coupling between the second thread portion 232-2 of the clamping screw 230 and the second thread portion 240-2 of the securing member 240 is released, that is, when the clamping screw 230 can be rotated freely in the securing member 240.
[130]
[131] Fourth embodiment
[132] FIG. 6 is a sectional view of a cutting tool according to the fourth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
[133]
[134] The cutting tool according to the third embodiment of the present invention comprises a holder 320 having a pocket portion 322 formed on an upper portion thereof and a clamping hole 321 formed below the pocket portion 322; a hollow intermediate member 340 provided fixedly in the clamping hole 321 of the holder 320; an insert 310 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 322 of the holder 320; and a clamping screw 330 comprising a head portion 331 contacted with a circumference surface of a through hole 311 of the insert 310 and a coupling portion 332 passing through the through hole 311 of the insert 310 and coupled with the intermediate member 340 provided in the clamping hole 321 of the holder 320 for securing the insert 310 to the holder 320.
[135]
[136] A construction and function of each of the members constituting the cutting tool according to this embodiment are similar to those of the members constituting the cutting tool according to the third embodiment. In this embodiment, however, there is a difference that the intermediate member 340 does not have function to secure the seat. In addition, the intermediate member 340 may be secured to the clamping hole 321 in a press fit manner.
[137]
[138] A feature of the cutting tool according to this embodiment is that the intermediate member 340 provided fixedly in the clamping hole 321 of the holder 320 is a hollow member having an opened upper and a closed lower end and an elastic member 350 (for example, spring) may be provided between a bottom surface of the intermediate member 340 and a lower surface of the insert 310.
[139]
[140] Due to the intermediate member 340 having the structure as described above and the elastic member 350, when a screw-couple between the second thread portion 332-2 of the clamping screw 330 and the second thread portion 340-2 of the intermediate member 340 and a screw-couple between the first thread portion 332-1 of the clamping screw 330 and the first thread portion 340-1 of the intermediate member 340 are released, the clamping screw 330 is moved upward in the securing member 340 by means of an elastic force of the elastic member 350 in a state where an external force is not applied, so the user can easily notice the de-coupling state.
[141]
[142] In the cutting tool according to this embodiment, the processes for mounting, rotating and re-mounting the insert 310 are the same as those in the cutting tool according to the third embodiment, and so a detailed description thereon is omitted.
[143]
[144] Fifth embodiment
[145] FIG. 7 is a sectional view of a cutting tool according to the fifth embodiment of the present invention and corresponds to the view taken along the line A-A in FIG. 1.
[146]
[147] The cutting tool according to the third embodiment of the present invention comprises a holder 420 having a pocket portion 422 formed on an upper portion thereof and a clamping hole 421 formed below the pocket portion 422; an insert 410 having a cutting portion (cutting edge or cutting corner) and placed on the pocket portion 422 of the holder 420; a clamping screw 430 comprising a head portion 431 contacted with a circumference surface of a through hole 411 of the insert 410 and a coupling portion 432 passing through the through hole 411 of the insert 410 and coupled with the clamping hole 421 of the holder 420 for securing the insert 410 to the holder 420; and a cylindrical stopper member 440 provided between an inner circumference surface of the clamping hole 421 of the holder 420 and an outer circumference surface of the coupling portion 432 of the clamping screw 430.
[148]
[149] In the cutting tool according to this embodiment, as shown in FIG. 7, a thread portion 421-1 is formed on a lower portion of the inner circumference of the clamping hole 421 of the holder 420 and a thread portion 432-1 is formed on a lower portion of the coupling portion 432 of the clamping screw 430.
[150]
[151] Also, the hollow cylindrical stopper member 440 is placed on an upper region of the clamping hole 421 of the holder 420, an upper region (that is, a region on which the thread portion 423-1 is not formed) of the coupling portion 432 of the clamping screw 430 is received in the stopper member 440.
[152]
[153] In the meantime, the stopper member 440 can be provided securely in the clamping hole 421 of the holder 420 in a press-fit manner.
[154]
[155] On the other hand, a protrusion portion 441 are formed on an inner circumference of an upper end portion of the cylindrical stopper member 440 and extended to a center in a radial direction, and this protrusion portion 441 may be contacted with the thread portion 432- 1 formed on the coupling portion 432 of the clamping screw 430.
[156]
[157] The protrusion portion 411 can be a protruded ring member extended from an inner circumference of an upper end portion of the cylindrical stopper member 440. In addition, a thread portion may be formed on an inner circumference surface of the protrusion portion 441.
[158]
[159] Once the stopper 440 is secured into the clamping hole 421 of the holder 420, the cutting tool having the structure as described above is maintained in a state in which the cutting tool of the first embodiment is maintained. Accordingly, an additional description on this embodiment is omitted. [160]
[161] Although the preferred embodiment has been described with reference to the preferred embodiment thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.
[162]
[163] For example, the above description illustrate that the cutting tool according to the fourth embodiment shown in FIG. 6 has the structure in which a lower end of the securing member 340 is closed and the elastic member 350 is provided between a bottom face of the securing member 340 and a lower face of clamping screw 330. However, the above structure can be applied to the cutting tools of the first and second embodiments.
[164]
[165] That is, the holder 20 or 120 in which the clamping hole 21 or 121 having a closed lower end is formed can be mounted in the cutting tool of the first or second embodiment, and the elastic member can be provided between a bottom face of the clamping hole 21 or 121 and a lower face of the clamping screw 30 or 130.
[166]
Industrial Applicability
[167] In the cutting tool according to the present invention having the structure and function as described above, the insert can be rotated and correspond a new cutting portion (cutting edge or cutting corner) to a work-piece without detaching completely a clamping screw from a holder, and so it is possible to prevent a clamping screw from being lost when changing a cutting portion of an insert.

Claims

Claims
[1] A cutting tool, comprising 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 a plurality of cutting edges 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, wherein one of an inner circumference of the clamping hole of the holder and the coupling portion of the coupling screw is provided with an upper thread portion and a lower thread portion spaced apart from each other by an region on which threads are not formed, while the other one is provided with one thread portion couplable with the upper thread portion and the lower thread portion.
[2] The cutting tool according to claim 1, wherein the upper and lower thread portions are formed on an inner circumference surface of the clamping hole of the holder and spaced apart from each other and the one thread portion is formed on a lower portion of the coupling portion of the coupling screw.
[3] The cutting tool according to claim 2, wherein the thread portion of the clamping screw has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping hole of the holder.
[4] The cutting tool according to claim 3, wherein the upper thread portion has a length shorter than that of the lower thread portion and the lower thread portion has a length longer than that height of the pocket portion.
[5] The cutting tool according to claim 1, wherein the upper and lower thread portions are formed on the clamping screw and spaced apart from each other, and the one thread portion is formed on an upper portion of an inner circumference surface of the clamping hole of the holder.
[6] The cutting tool according to claim 5, wherein the thread portion formed on the clamping hole of the holder has a length shorter than a distance between the upper thread portion and the lower thread portion of the clamping screw.
[7] The cutting tool according to claim 6, wherein the upper thread portion has a length longer than that of the lower thread portion and the upper thread portion has a length longer than that height of the pocket portion.
[8] The cutting tool according to any one of claim 1 to claim 7, wherein the clamping hole of the holder has a closed lower end, an elastic member is provided between a bottom face of the clamping hole and a lower face of the clamping screw.
[9] A cutting tool, comprising a holder consisting of a pocket portion having a side face and a pocket portion and a clamping hole formed below the pocket portion; a seat having a central hole and placed on the pocket portion of the holder; a securing member having a hollow cylindrical shape and having a head portion contacted with the inner wall of the central hole of the seat, an outer circumference portion coupled with an inner circumference surface of the clamping hole of the holder, and an inner circumference surface on which a coupling portion is formed; an insert having a plurality of cutting edges and a through hole and mounted on the seat; 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 securing member fixed in the clamping hole of the holder, a plurality of thread portions spaced from each other being formed on each of an inner circumference surface of the securing member and the coupling portion of the clamping screw.
[10] The cutting tool according to claim 9, wherein the securing member is the member having a closed lower end, an elastic member is provided between a bottom face of the securing member and a lower face of the clamping screw.
PCT/KR2007/004129 2007-08-28 2007-08-28 Cutting tool having a structure for easy rotation of insert WO2009028744A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/004129 WO2009028744A1 (en) 2007-08-28 2007-08-28 Cutting tool having a structure for easy rotation of insert

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2007/004129 WO2009028744A1 (en) 2007-08-28 2007-08-28 Cutting tool having a structure for easy rotation of insert

Publications (1)

Publication Number Publication Date
WO2009028744A1 true WO2009028744A1 (en) 2009-03-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017109179A (en) * 2015-12-17 2017-06-22 株式会社キンキ Cutting blade of shearing type crusher, and shearing type crusher equipped with the cutting blade

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027019A1 (en) * 1996-01-25 1997-07-31 Sandvik Aktiebolag Cutting insert for chip-breaking machining of metals
US6158928A (en) * 1998-04-29 2000-12-12 Iscar Ltd. Cutting tool assembly and a cutting insert for use therein
US6457914B1 (en) * 2000-08-24 2002-10-01 Kennametal Inc. Clamping tool holder
WO2003013772A1 (en) * 2001-08-09 2003-02-20 Sandvik Aktiebolag Rotatable cutting tool_and securing arrangement for the insert
US20050105974A1 (en) * 2002-05-14 2005-05-19 Vargus Ltd. Tool and method for the machine working of workpieces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027019A1 (en) * 1996-01-25 1997-07-31 Sandvik Aktiebolag Cutting insert for chip-breaking machining of metals
US6158928A (en) * 1998-04-29 2000-12-12 Iscar Ltd. Cutting tool assembly and a cutting insert for use therein
US6457914B1 (en) * 2000-08-24 2002-10-01 Kennametal Inc. Clamping tool holder
WO2003013772A1 (en) * 2001-08-09 2003-02-20 Sandvik Aktiebolag Rotatable cutting tool_and securing arrangement for the insert
US20050105974A1 (en) * 2002-05-14 2005-05-19 Vargus Ltd. Tool and method for the machine working of workpieces

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017109179A (en) * 2015-12-17 2017-06-22 株式会社キンキ Cutting blade of shearing type crusher, and shearing type crusher equipped with the cutting blade

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