US20130330136A1 - Cutting Insert and Tool Having an Anti-Slip Arrangement - Google Patents

Cutting Insert and Tool Having an Anti-Slip Arrangement Download PDF

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Publication number
US20130330136A1
US20130330136A1 US13/490,197 US201213490197A US2013330136A1 US 20130330136 A1 US20130330136 A1 US 20130330136A1 US 201213490197 A US201213490197 A US 201213490197A US 2013330136 A1 US2013330136 A1 US 2013330136A1
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US
United States
Prior art keywords
insert
tool
cutting
base surface
actuator
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US13/490,197
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English (en)
Inventor
Gil Hecht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iscar Ltd
Original Assignee
Iscar 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 Iscar Ltd filed Critical Iscar Ltd
Priority to US13/490,197 priority Critical patent/US20130330136A1/en
Assigned to ISCAR, LTD. reassignment ISCAR, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HECHT, GIL
Priority to EP13737668.7A priority patent/EP2858775B1/en
Priority to CN201380029723.8A priority patent/CN104334302B/zh
Priority to KR1020147033550A priority patent/KR20150020286A/ko
Priority to RU2014153153A priority patent/RU2014153153A/ru
Priority to US14/398,888 priority patent/US9573204B2/en
Priority to BR112014027164A priority patent/BR112014027164A2/pt
Priority to CA2870797A priority patent/CA2870797C/en
Priority to JP2015515645A priority patent/JP2015522433A/ja
Priority to PCT/IL2013/050473 priority patent/WO2013183045A1/en
Publication of US20130330136A1 publication Critical patent/US20130330136A1/en
Priority to IL235561A priority patent/IL235561A0/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2265—Securing arrangements for bits or teeth or cutting inserts by means of a wedge
    • B23C5/2269—Securing arrangements for bits or teeth or cutting inserts by means of a wedge for plate-like cutting inserts 
    • B23C5/2273—Securing arrangements for bits or teeth or cutting inserts by means of a wedge for plate-like cutting inserts  having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
    • B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts 
    • B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts  having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/16—Supporting or bottom surfaces
    • B23B2200/161—Supporting or bottom surfaces with projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/16—Supporting or bottom surfaces
    • B23C2200/161—Supporting or bottom surfaces with projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/16—Fixation of inserts or cutting bits in the tool
    • B23C2210/168—Seats for cutting inserts, supports for replacable cutting bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2270/00—Details of milling machines, milling processes or milling tools not otherwise provided for
    • B23C2270/08—Clamping mechanisms or provision for clamping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
    • B23C5/2465—Securing arrangements for bits or teeth or cutting inserts adjustable the adjusting means being notches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
    • B23C5/2468—Securing arrangements for bits or teeth or cutting inserts adjustable the adjusting means being serrations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1908—Face or end mill
    • Y10T407/192—Face or end mill with separate means to fasten tool to holder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1934—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/228—Rotatable cam clamp element
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges

Definitions

  • the subject matter of the present application relates to cutting inserts and tools for holding same, in particular cutting inserts and tools designed for metal-working machines. More specifically, the application relates to a construction and/or method relating to prevention of slippage of a cutting insert mounted on a tool.
  • Precise positioning of a cutting insert in a tool can allow for high precision cutting.
  • cutting inserts are often subjected to high forces during cutting operations which can cause displacement or change of orientation of the cutting insert in a tool which hold them.
  • U.S. Pat. No. 6,536,996 discloses a cutting tool comprising a tool body and two cutting inserts mounted therein.
  • An insert receiving pocket of the tool body has a pocket base wall.
  • An indentation that opens to the pocket base wall has a lower wall that is bounded by first, second, third and fourth side walls.
  • the cutting insert has an insert base wall.
  • a protuberance extends downwards from the insert base wall and has a lower wall bounded by first, second, third and fourth lateral walls.
  • the insert base wall abuts the pocket base wall, the first lateral wall abuts the first side wall, the third lateral wall abuts the third side wall, the first lateral wall is distanced from a center line by a first distance, the cutting edge close to the center line is distanced therefrom by a second distance where the first distance is at least three times greater than the second distance and where a relief surface of the cutting insert is relieved from the insert receiving pocket.
  • the subject matter of the present invention relates to, inter alia, an anti-slip arrangement for maintaining a precise mounted operative position of a cutting insert in a tool.
  • High-speed tools can be defined as those which are configured for operation in which a friction lock is insufficient to withstand centrifugal forces during rotation. Further elaboration can be found in ISO 15641.
  • Such arrangements could also be particularly beneficial for lateral cutting operations (including, for example, ramp-down operations), even at lower speeds, in which cutting inserts can tend to be subjected to high displacement forces.
  • a method of clamping a cutting insert to a tool or, stated differently, securing a cutting insert against slippage in an operative position on a tool in accordance with a first aspect of the subject matter of the present application, there is provided a method of clamping a cutting insert to a tool or, stated differently, securing a cutting insert against slippage in an operative position on a tool.
  • the method comprises mounting the cutting insert on the tool in a position in which an insert base surface contacts a tool base surface, and biasing a clamp's tool actuator surface against an insert actuator surface to thereby force non-parallel first and second insert abutment surfaces respectively against non-parallel first and second tool abutment surfaces.
  • Abutment of the base surfaces and abutment surfaces can be configured to prevent slippage of the cutting insert along the tool base surface.
  • slippage of the cutting insert along the tool base surface can include rotational and/or translational motion.
  • the slippage could be visible slippage, i.e. there could be sufficient constructional tolerance of the tool and/or cutting insert to allow visible relative motion thereof, which could allow the clamp to suitably position the cutting insert.
  • the slippage could also be non-visible slippage, i.e. extremely small, such that it is not visible without magnification, but which can occur during cutting operations.
  • the method can comprise: the tool comprising an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, and a tool anti-slip arrangement; the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface which is oriented transverse to the tool base surface; the cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface; the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface which is oriented transverse to the insert base surface; wherein the method comprises:
  • a tool assembly can be configured for application of the methods detailed in the first aspect.
  • the cutting insert and the tool can be configured such that the insert base surface contacts the tool base surface and the clamp is configured to bias the tool actuator surface against the insert actuator surface. Such biasing can consequently bias the first and second insert abutment surfaces against the first and second tool abutment surfaces. This arrangement can prevent slippage of the cutting insert along the tool base surface.
  • the tool assembly can comprise in combination a tool configured for cutting in a cutting direction and a cutting insert mounted to the tool: the tool comprising an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, the cutting direction being defined as extending from the tool inner region towards the tool peripheral region, and a tool anti-slip arrangement; the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface which is oriented transverse to the tool base surface; the cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface which is oriented transverse to the insert:
  • a cutting insert comprising first and second insert abutment surfaces which are non-parallel to each other and an insert actuator surface, which are together configured for positioning of the insert in a tool.
  • the cutting insert can be configured for use in the tool assembly or in application of the methods detailed in the previous aspects.
  • the first and second insert abutment surfaces and the insert actuator surface can be, in a bottom view of the cutting insert, in a triangular configuration.
  • the first and second insert abutment surfaces can partially or along the entire length thereof, converge towards each other.
  • the cutting insert can comprise opposing insert top and base surfaces which are connected by an insert peripheral surface, at least one cutting edge, and an insert anti-slip arrangement formed adjacent to the insert base surface; the insert anti-slip arrangement comprising first and second insert abutment surfaces which are non-parallel to each other and to the insert base surface, and an insert actuator surface having a blunt shape and lying in an insert actuator surface plane which is oriented transverse to the insert base surface; wherein pairs of closest points of the first and second insert abutment surfaces lie within respective common insert abutment surface planes which are parallel to the insert actuator surface plane, are a predetermined distance apart; and at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the insert actuator surface plane.
  • a cutting insert comprising opposing insert top and base surfaces which are connected by an insert peripheral surface, opposing first and second cutting ends arranged along an insert longitudinal plane perpendicular to the insert top and base surfaces, a protuberance surrounded by the insert base surface and spaced apart from the insert peripheral surface, and first and second insert anti-slip arrangements formed on the protuberance, each insert anti-slip arrangement comprising: outwardly facing first and second insert abutment surfaces which are non-parallel to the insert base surface, and an outwardly facing insert actuator surface oriented transverse to the insert base surface, wherein: the first and second insert abutment surfaces of one insert anti-slip arrangement converge in a direction towards the insert actuator surface of the other anti-slip arrangement and also towards an associated cutting end.
  • a tool comprising first and second tool abutment surfaces which are non-parallel to each other and a tool actuator surface, which are configured for positioning of an insert in a tool.
  • the tool can be configured for use in the tool assembly or application of the methods detailed in the previous aspects.
  • the first and second tool abutment surfaces and the tool actuator surface can be, in a plan view thereof, in a triangular configuration.
  • the first and second tool abutment surfaces can partially or along the entire length thereof, converge towards each other.
  • the tool can have a cutting direction and can comprise an insert seating region comprising a tool base surface, tool inner and peripheral regions located on opposing sides of the insert seating region, the cutting direction being defined as extending from the tool inner region towards the tool peripheral region, and a tool anti-slip arrangement;
  • the tool anti-slip arrangement comprising first and second tool abutment surfaces formed adjacent to the tool base surface and being non-parallel to each other and to the tool base surface, and a clamp located at the tool inner region and comprising a tool actuator surface lying in a tool actuator surface plane which is oriented transverse to the tool base surface; wherein pairs of closest points of the first and second tool abutment surfaces lie within respective common tool abutment surface planes which are parallel to the tool actuator surface plane, are a predetermined distance apart; at least one of the predetermined distances has a greater magnitude than another predetermined distance which is associated with a pair of points further spaced from the tool actuator surface plane; and the clamp is configured for force application in the cutting direction via the tool actuator surface.
  • the cutting insert or tool of the aspects above can comprise a base surface and an anti-slip arrangement.
  • Each anti-slip arrangement can comprise an actuator surface and first and second abutment surfaces.
  • the anti-slip arrangement of the tool can comprise a clamp.
  • the cutting insert can be mounted on the cutting tool via engagement of the base surfaces thereof and the clamp can be operated to bias the actuator surfaces and first and second abutment surfaces against each other for preventing slippage of the cutting insert along the tool's base surface.
  • FIG. 1A is a perspective view of a tool assembly
  • FIG. 1B is a plan view of the tool assembly in FIG. 1 ;
  • FIG. 1C is a side view of the tool assembly in FIGS. 1 and 2 ;
  • FIG. 1D is an exploded view of the tool assembly in FIGS. 1 to 3 ;
  • FIG. 2 is a plan view of a tool of the tool assembly in FIGS. 1A to 1D ;
  • FIG. 3A is a side view of the cutting insert in FIGS. 1A to 1D ;
  • FIG. 3B is a bottom perspective view of a cutting insert in FIG. 3A ;
  • FIG. 3C is a bottom view of the cutting insert in FIGS. 3A and 3B ;
  • FIG. 3D is an enlarged bottom view of the cutting insert in FIGS. 3A to 3D ;
  • FIG. 3E is a schematic view of an abutment surface, a non-abutment surface and connecting surfaces thereto;
  • FIG. 4A is a top perspective view of a clamp in FIGS. 1A to 1D ;
  • FIG. 4B is a side view of the clamp in FIG. 4A ;
  • FIG. 4C is a perspective side view of the clamp in FIGS. 4A and 4B ;
  • FIG. 4D is a plan view of the clamp in FIGS. 4A to 4C ;
  • FIG. 5A is a plan view of a tool, including a screw and clamp thereof, in FIGS. 1A to 1D ;
  • FIG. 5B is an enlarged view of a portion of the tool, screw and clamp in FIG. 5A ;
  • FIG. 5C is an enlarged view of a portion of the tool, screw and clamp in FIG. 5A , with the clamp located in a different position to FIGS. 5A and 5B .
  • FIGS. 1A to 1D which illustrate a tool assembly 10 comprising a tool 12 and at least one cutting insert 14 clamped thereto.
  • the tool exemplified is a milling tool-head, however any tool-head or tool including a shaft or body, etc., could also be defined as a tool for the purposes of the specification and claims, provided that such component comprises an insert seating region configured for clamping of a cutting insert thereto.
  • the tool assembly 10 in this non-limiting example, is configured to mill a workpiece (not shown) by rotating about a tool axis A T in a rotation direction D R , which in this non-limiting example can be counterclockwise.
  • the tool 12 can comprise an insert seating region 16 comprising a tool base surface 18 , tool inner and peripheral regions 20 , 22 located on opposing sides of the insert seating region 16 , and a tool anti-slip arrangement 24 .
  • the tool anti-slip arrangement 24 can comprise first and second tool abutment surfaces 26 A, 26 B formed adjacent to the tool base surface 18 , and a clamp 28 comprising a tool actuator surface 30 .
  • the clamp 28 can be located at the tool inner region 20 .
  • the tool actuator surface 30 can be oriented transverse to the tool base surface 18 .
  • the cutting insert 14 can comprise opposing insert top and base surfaces 32 , 34 which are connected by an insert peripheral surface 36 , at least one cutting edge 38 , and an insert anti-slip arrangement 40 formed adjacent to the insert base surface 34 .
  • the insert anti-slip arrangement 40 can comprise first and second insert abutment surfaces 42 A, 42 B and an insert actuator surface 44 which is oriented transverse to the insert base surface 34 .
  • the periphery of the cutting insert 14 may be considered to include not only the insert peripheral surface 36 , but also the insert actuator surface 44 and first and second insert abutment surfaces 42 A, 42 B, which are oriented transverse to the insert base surface 34 .
  • the first and second tool abutment surfaces 26 A, 26 B and first and second insert abutment surfaces 42 A, 42 B are configured for engaging each other.
  • the abutment surfaces 26 A, 26 B, 42 A, 42 B can have corresponding shapes (in this example following straight lines) and orientations and can extend at a cutting insert abutment or tool abutment angle ⁇ CA , ⁇ TA of less than 180° to each other.
  • each pair of abutment surfaces can respectively form a wedge-shaped arrangement.
  • the cutting insert 14 is mounted on the tool 12 in a position in which the insert base surface 34 contacts the tool base surface 18 . Stated differently, the cutting insert 14 can be seated on the tool 12 , via the tool and insert base surfaces 18 , 34 thereof. Subsequently, the clamp's tool actuator surface 30 can be biased against the insert actuator surface 44 resulting in the first and second insert abutment surfaces 42 A, 42 B being respectively biased against the first and second tool abutment surfaces 26 A, 26 B.
  • clamping can be advantageous for preventing slippage of a cutting insert along a tool base surface since a cutting insert can be simultaneously clamped on three surfaces thereof, namely an insert actuator surface, and first and second insert abutment surfaces thereof. It will be understood that in cases of non-parallel abutment surfaces, simultaneous three-point contact can be achieved, the three points (or three surfaces) being located in a non-linear arrangement and hence can constitute a triangular arrangement. In particular, such arrangement of the abutment surfaces and actuator surfaces is suitable for preventing translation and rotation, of a cutting insert relative to a tool, along a base plane P B ( FIGS. 1B and 2 ) which is parallel with the tool base surface 18 and insert base surface 34 .
  • P B FIGS. 1B and 2
  • a further advantage may be possibly achieved by biasing the tool actuator surface 30 in a cutting direction D C ( FIG. 2 ). It will be understood that a tendency of cutting insert 14 to slide or be moved out of a desired position, can be greatest at an active first cutting end 46 thereof ( FIG. 1C ) when it is in contact with a workpiece (not shown). By securing the active first cutting end 46 of the cutting insert, through applying clamping force outward from the tool, maintenance of a precise location of the cutting insert or active first cutting end 46 is achievable.
  • the cutting direction D C can be defined as extending from the tool inner region 20 towards the tool peripheral region 22 . More precisely, a cutting insert is normally mounted at a peripheral part of a tool, and normally protrudes from the tool to ensure that only the cutting insert, and not the tool contacts a workpiece (not shown). Therefore, such tool peripheral region 22 can be considered as comprising a peripheral edge 48 ( FIG. 1D ) surrounding a protruding cutting edge 38 of the cutting insert 14 , when mounted to the tool 12 , or, when the cutting insert 14 is not mounted to the tool 12 , the tool peripheral region 22 can be considered as a peripheral edge 48 surrounding the insert seating region 16 . Stated alternatively, i.e. in relation to the cutting insert 14 , the cutting direction can be considered to extend from a non-cutting end 50 thereof ( FIG. 1C ) in towards an active first cutting end 46 thereof.
  • the cutting insert 14 and/or the tool 12 can be configured so that the only surfaces of the tool 12 which contact a periphery of the cutting insert 14 are the tool actuator surface 30 and the first and second tool abutment surfaces 26 A, 26 B. Stated differently, surfaces of the tool which extend upwardly from the tool 12 , or, surfaces adjacent the insert peripheral surface 36 , such as tool wall surfaces 52 A, 52 B ( FIGS. 1C and 2 ), are spaced-apart from the cutting insert 14 . As such tool wall surfaces do not contact the insert peripheral surface 36 , which in this example forms, at an intersection with the top surface 32 , the cutting edge 38 .
  • the tool 12 can be suitable to hold cutting inserts of different shapes.
  • the above-construction can configure a tool for holding different shaped cutting inserts (albeit which have a correspondingly shaped anti-slip arrangement). Accordingly it can be an advantageous for a cutting insert or tool to have spaced-apart anti-slip arrangements and cutting edges or tool wall surfaces, respectively.
  • the cutting edge 38 in this example here extends along the entire intersection of the insert top surface 32 and insert peripheral surface 36 .
  • the active first cutting end 46 in this non-limiting example, comprises only a portion of the edge including first and second lateral cutting edge portions 54 A, 54 B and an end cutting edge portion 54 C extending therebetween.
  • the insert top surface 32 at least a portion thereof adjacent to the active first cutting end 46 , can be configured as a rake surface over which chips (not shown) pass, and at least a portion of the insert peripheral surface 36 adjacent thereto can be configured as a relief surface.
  • the cutting insert 14 can comprise an insert cutting plane P IC which extends perpendicular to the insert base surface 34 and an insert longitudinal plane P.
  • the insert longitudinal plane P IL extends longitudinally through the cutting insert 14 , connects opposing first and second cutting ends 46 , 46 ′ and is perpendicular to the insert base surface 34 .
  • the insert cutting plane P IC theoretically divides the cutting insert 14 into imaginary first and second insert halves 56 A, 56 B.
  • the first and second insert abutment surfaces 42 A, 42 B can be at least partially located at the first insert half 56 A and the insert actuator surface 44 can be located at the second insert half 56 B.
  • an entirety of the second abutment surface 42 A is located at the first insert half 56 A.
  • insert actuator surface 44 and/or tool actuator surface 30 can be more suitable for stable engagement if at least one, and preferably both, of the two has a blunt shape.
  • the insert actuator plane P IA can be oriented transverse to the insert base surface 34 , that the insert actuator surface can extend in a direction away from the insert top surface 32 , and that the insert actuator surface can follow a straight line.
  • the tool actuator surface 30 can extend perpendicular to the tool base surface 18 .
  • the first and second insert abutment surfaces 42 A, 42 B and the insert actuator surface 44 constitute a first set of engagement surfaces which are associated with the first cutting end 46 .
  • the insert actuator surface 44 of this first set can extend between two other surfaces, which in the present example (showing an indexable insert) can be additional first and second insert abutment surfaces 42 A′, 42 B′ belonging to a second, additional set of engagement surfaces and are associated with the second cutting end 46 ′.
  • the additional first and second insert abutment surfaces 42 A′, 42 B′ can comprise end points 58 A, 58 B which can be connection points with the insert actuator surface 44 .
  • a blunt actuator surface i.e. the insert actuator surface 44 and/or the tool actuator surface 30
  • a cutting insert can be directed in a precise direction to best achieve a precise, stable mounting arrangement.
  • an actuator surface which is not blunt i.e. having a small radius of curvature, such as shown by the imaginary line designated by the numeral 60 in FIG. 3E , or a V-shape in a plan view
  • an actuator surface which is not blunt is likely to be more prone to allowing an applied force to be directed in inconsistent or uncontrolled directions, especially during application of cutting forces on a cutting insert or associated tool.
  • the example shown in FIG. 3D while appearing flat/straight in a plan view from afar, would be shown to have a slight convex curvature if magnified.
  • the most preferred configuration is a very slightly curved, preferably convexly-curved, (e.g. as schematically exemplified in FIG. 3E ) insert actuator surface (or, alternatively, a very slightly convexly-curved tool actuator surface), which can allow precise, consistent contact on a single point thereof.
  • the most preferable configuration is one in which the alternate actuator surface (i.e. the actuator surface which is not convexly-curved, in this case the tool actuator surface 30 ) is flat (i.e. without curvature).
  • a blunt actuator surface in this example being the insert actuator surface 44 , can be more precisely defined as having a curvature which does not extend along, or is free of, portions which are tangential to the additional first and second insert abutment surfaces 42 A′, 42 B′ (or other surfaces connected to the insert actuator surface 44 ).
  • the imaginary surface 60 which has a smaller radius of curvature than the exemplified, and exaggeratedly curved for the purpose of understanding, insert actuator surface 44 .
  • the imaginary surface 60 has portions 61 A, 61 B between end points 58 A, 58 B and a middle section thereof, which are tangential to imaginary tangent lines 62 A, 62 B.
  • the imaginary surface 60 is not considered blunt due to the small radius of curvature thereof. Rather, an actuator surface having a greater curvature, or being flat, and approaching a straight reference line L R which extends between the end points 58 A, 58 B is considered blunt. It is reiterated that the insert actuator surface 44 in FIG.
  • 3E is exaggeratedly curved and a more realistic view thereof is shown in FIG. 3D .
  • the alternate actuator surface 30 , 44 be flat.
  • the actuator surface 30 , 44 should be flatter than an imaginary surface 60 having a curvature extending along tangent lines.
  • such actuator surface 30 , 44 should be far flatter than such imaginary surface 60 .
  • the outermost point 44 A of the actuator surface 44 should preferably extend a second distance D 2 which is 25% of, or less than, the first distance D 1 , and, even more preferably, 10% of, or less than, the first distance D 1 .
  • an actuator surface may still be considered blunt in a case where there is a mere intermediary change of radius at the end points 58 A, 58 B. This is because the purpose of the bluntness is most relevant at the outermost point 44 A, or contact point, or, least a central portion of the actuator surface 44 , which is configured to engage another associated actuator surface.
  • the first and second insert abutment surfaces 42 A, 42 B and the insert actuator surface 44 face outward from the cutting insert 14 (exemplified by outwardly directed arrows designated 62 A, 62 B and 62 C).
  • the first and second insert abutment surfaces 42 A, 42 B and the insert actuator surface 44 can extend in a direction away from the insert top surface 32 (exemplified by a downwardly directed arrow designated as 64 ).
  • all of the first and second insert abutment surfaces 42 A, 42 B, and the insert actuator surface 44 are formed on a single protuberance 70 which has a non-contacting lower protuberance surface 71 ( FIG. 3B ).
  • the insert actuator surface 44 and the first and second insert abutment surfaces 42 A, 42 B can be formed on a single protuberance 70 which itself may be formed in a central area of the insert base surface 34 and spaced apart on all sides from the insert peripheral surface 36 by the insert base surface 34 .
  • the exemplary cutting insert 14 shown is indexable, and can have 180° rotational symmetry around an insert central axis A IC ( FIG. 3D ) extending perpendicular to, and through the center of, the insert base surface 34 . Accordingly, the cutting insert 14 can be configured with a second insert anti-slip arrangement 40 ′.
  • the second insert anti-slip arrangement 40 ′ can comprise the additional first and second insert abutment surfaces 42 A′, 42 B′ mentioned above, and an additional insert actuator surface 44 ′.
  • the surfaces 42 A, 42 B, 44 , 42 A′, 42 B′, 44 ′ of the first and second insert anti-slip arrangements 40 , 40 ′ form all sides of or enclose the single protuberance 70 .
  • the single protuberance 70 of the non-limiting example cutting insert 14 shown can be considered to have two sets of engagement surfaces, a first set including surfaces 42 A, 42 B and 44 and a second set including surfaces 42 A′, 42 B′ and 44 ′.
  • first and second tool abutment surfaces 26 A, 26 B and the tool actuator surface 30 can face inwardly (i.e., toward the center of the insert seating region 16 , as exemplified by inwardly directed arrows designated 72 A, 72 B and 72 C).
  • the first and second tool abutment surfaces 26 A, 26 B and the tool actuator surface 30 can be recessed into the insert seating region 16 . Stated differently, the first and second tool abutment surfaces 26 A, 26 B and the tool actuator surface 30 can be side surfaces of a recess 74 formed in the insert seating region 16 .
  • exemplary tool actuator surface 30 and the first and second tool abutment surfaces 26 A, 26 B shown are perpendicular to the tool base surface 18 , they could also be at least partially slanted in a upward-inward direction (for example, as shown in FIG. 4B , the tool actuator surface 30 could be slanted in the upward-inward direction shown by the arrow designated as 76 .
  • the exemplary insert actuator surface 44 and the first and second insert abutment surfaces 42 A, 42 B shown are perpendicular to the insert base surface 34 , they could also be at least partially slanted in a downward-outward direction (for example the insert actuator surface 44 could be slanted in the downward-outward direction shown by the arrow designated as 66 ; for comparison, the arrow designated as 68 is directed a downward-inward direction).
  • first and second insert abutment surface planes P 1 , P 2 each of which are parallel to the insert actuator surface plane P IA .
  • first insert abutment surface plane P 1 is closer to the insert actuator surface plane P IA and that a pair of points 78 A, 78 B of the first and second insert abutment surfaces 42 A, 42 B which lie on the first insert abutment surface plane P 1 are spaced apart from each other a greater magnitude of distance than a pair of points 80 A, 80 B which lie on the second insert abutment surface plane P 2 .
  • the first and second insert abutment surfaces 42 A, 42 B belonging to the first set of engagement surfaces converge in a direction toward the additional insert actuator surface 44 ′ belonging to the second set of engagement surfaces and also toward the associated first cutting end 46 .
  • the additional first and second insert abutment surfaces 42 A′, 42 B′ belonging to the second set of engagement surfaces converge in a direction toward the insert actuator surface 44 belonging to the first set of engagement surfaces and also toward the associated second cutting end 46 ′.
  • tool anti-slip arrangement 24 mutatis mutandis
  • the tool actuator surface plane P TA corresponds to the insert actuator surface plane P IA
  • first and second tool abutment surface planes P 3 and P 4 correspond to first and second insert abutment surface planes P 1 , P 2
  • points 78 C, 78 D correspond to points 78 A, 78 B
  • points 80 C, 80 D correspond to points 80 A, 80 B
  • the protuberance 70 on which the insert first and second abutment surfaces 42 A, 42 B are formed can be entirely spaced apart from the insert peripheral surface 36 .
  • the insert base surface 34 can extend continuously along the entire insert peripheral surface 36 and can completely surround the insert first and second abutment surfaces 42 A, 42 B and the insert actuator surface 44 .
  • the base surface 34 can be flat.
  • any of the above features e.g. a continuous insert base surface 34 , a base surface which extends along a periphery of a cutting insert, a flat base surface, etc., can provide stable mounting of a cutting insert on a tool.
  • the tool base surface 18 can, for example, extend along the entire insert peripheral surface except for a portion completed by the clamp 28 .
  • a first portion 80 of the tool base surface 18 adjacent to the first tool abutment surface 26 A has less material thereunder than a second portion 82 of the tool base surface 18 which is closer to the tool axis A T ( FIG. 1C ).
  • forming the first portion 80 of the tool base surface 18 to be larger than the second portion 82 of the tool base surface 18 can possibly provide advantageous constructional strength, especially in such cylindrical tools.
  • Such enlargement can be achieved by widening the first portion 80 .
  • a first tool base width W T1 of the first portion 80 of the tool base surface 18 which extends from, and perpendicular to, the first tool abutment surface 26 A can be greater than a second tool base width W T2 which extends from, and perpendicular to, the second tool abutment surface 26 B.
  • the insert base surface 34 can be configured to correspond to the tool base surface 18 .
  • a first insert base width W I1 of the insert base surface 34 which extends from, and perpendicular to, the first insert abutment surface 42 A can be greater than a second insert base width W I2 which extends from, and perpendicular to, the second insert abutment surface 42 B.
  • the tool and insert base surfaces 18 , 34 can be clamped against each other by a biasing arrangement 84 ( FIG. 1D ).
  • This biasing arrangement 84 or a different one can, in any case, be configured to prevent movement of a cutting insert in a direction away from a tool base surface.
  • the biasing arrangement 84 can comprise a biasing arrangement screw 86 configured to extend through a through hole 88 of the cutting insert 14 , and a threaded bore 90 formed in the tool 12 to which the biasing arrangement screw 86 is securable.
  • the clamp 28 can be configured to receive a clamp screw 97 via a clamp bore 95 ( FIG. 4D ) formed in the clamp 28 .
  • the clamp 28 can comprise a slanted clamp surface 92 located between the tool actuator surface 30 and the clamp bore which is comprised to be abutted by the clamp screw 97 .
  • a clamp could conceivably comprise a bendable portion which could cause a change of position, or orientation, of a tool actuator surface
  • the non-limiting example shown is one where the entire clamp 28 is movable upon engagement by the clamp screw 97 .
  • biasing arrangement 84 can be configured to allow slippage of the cutting insert 14 along the tool base surface 18 , as the biasing arrangement screw 86 will normally allow limited slippage along the base plane P B .
  • clamping of the cutting insert 14 to the tool 12 can comprise sliding motion of the cutting insert's insert base surface 34 along the tool base surface 18 .
  • the clamp 28 can be moved a motion direction D M which is transverse to the cutting direction D C .
  • FIG. 5B shows a first position wherein there is a gap 98 between the tool actuator surface 30 and insert actuator surface 44
  • FIG. 5C shows contact of the tool actuator surface 30 and insert actuator surface 44 .
  • the tool 12 can be formed with a track 94 bounded by an inner wall 96 . Said wedging can occur between the insert actuator surface 44 and the inner wall 96 .
  • An internal direction angle A D formed between the cutting direction D C and the motion direction D M can be an acute angle.
  • the direction angle A D can be between 30° and 80°.
  • an internal clamp angle ⁇ of a clamp wall surface 100 with the tool actuator surface 30 can be an acute.
  • the clamp angle ⁇ can fulfill the condition 30° ⁇ 80°.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
US13/490,197 2012-06-06 2012-06-06 Cutting Insert and Tool Having an Anti-Slip Arrangement Abandoned US20130330136A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US13/490,197 US20130330136A1 (en) 2012-06-06 2012-06-06 Cutting Insert and Tool Having an Anti-Slip Arrangement
PCT/IL2013/050473 WO2013183045A1 (en) 2012-06-06 2013-06-03 Cutting insert and tool having an anti-slip arrangement
RU2014153153A RU2014153153A (ru) 2012-06-06 2013-06-03 Режущая пластина и инструмент, имеющий противоскользящее средство
CN201380029723.8A CN104334302B (zh) 2012-06-06 2013-06-03 具有防滑组件的切割插件和工具
KR1020147033550A KR20150020286A (ko) 2012-06-06 2013-06-03 슬립 방지 배열을 갖는 절삭 삽입체 및 공구
EP13737668.7A EP2858775B1 (en) 2012-06-06 2013-06-03 Cutting insert and tool having an anti-slip arrangement
US14/398,888 US9573204B2 (en) 2012-06-06 2013-06-03 Cutting tool having an anti-slip arrangement
BR112014027164A BR112014027164A2 (pt) 2012-06-06 2013-06-03 inserto de corte, ferramenta, conjunto de ferramenta, e, método para prender um inserto de corte em uma ferramenta
CA2870797A CA2870797C (en) 2012-06-06 2013-06-03 Cutting insert and tool having an anti-slip arrangement
JP2015515645A JP2015522433A (ja) 2012-06-06 2013-06-03 滑り止め構成部を有する切削インサートおよび工具
IL235561A IL235561A0 (en) 2012-06-06 2014-11-06 Putting cutting and tools with a non-slip structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13/490,197 US20130330136A1 (en) 2012-06-06 2012-06-06 Cutting Insert and Tool Having an Anti-Slip Arrangement

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/398,888 Continuation US9573204B2 (en) 2012-06-06 2013-06-03 Cutting tool having an anti-slip arrangement

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Publication Number Publication Date
US20130330136A1 true US20130330136A1 (en) 2013-12-12

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US13/490,197 Abandoned US20130330136A1 (en) 2012-06-06 2012-06-06 Cutting Insert and Tool Having an Anti-Slip Arrangement
US14/398,888 Active 2033-10-11 US9573204B2 (en) 2012-06-06 2013-06-03 Cutting tool having an anti-slip arrangement

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US14/398,888 Active 2033-10-11 US9573204B2 (en) 2012-06-06 2013-06-03 Cutting tool having an anti-slip arrangement

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US (2) US20130330136A1 (enExample)
EP (1) EP2858775B1 (enExample)
JP (1) JP2015522433A (enExample)
KR (1) KR20150020286A (enExample)
CN (1) CN104334302B (enExample)
BR (1) BR112014027164A2 (enExample)
CA (1) CA2870797C (enExample)
RU (1) RU2014153153A (enExample)
WO (1) WO2013183045A1 (enExample)

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US20150158091A1 (en) * 2013-12-11 2015-06-11 Iscar, Ltd. Cutting Insert Having A Dovetail Anti-Slip Arrangement
US9120154B2 (en) * 2013-02-14 2015-09-01 Iscar, Ltd. Single-sided square-shaped indexable cutting insert and cutting tool
US20150336187A1 (en) * 2012-12-24 2015-11-26 Taegutec Ltd. Cutting insert and milling cutter including same
US20170100778A1 (en) * 2015-10-09 2017-04-13 Sandvik Intellectual Property Ab Turning Insert
US20170291233A1 (en) * 2014-09-24 2017-10-12 Sandvik Intelectual Property Ab Cutting tool and a cutting insert for chip-removing tool
US20170326656A1 (en) * 2015-05-19 2017-11-16 Tungaloy Corporation Tool body and cutting tool
US20180264562A1 (en) * 2017-03-16 2018-09-20 Iscar, Ltd. Tool holder having position adjustment arrangement and cutting tool
US11090740B2 (en) 2019-02-12 2021-08-17 Iscar, Ltd. Rotary cutting body having insert pocket with seat surface provided with a plurality of abutment elements and rotary cutting tool
US11491560B1 (en) * 2021-07-13 2022-11-08 Taegutec Ltd. Cutting insert and rotary cutting tool including same

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US9682433B2 (en) * 2012-12-24 2017-06-20 Taegutec Ltd. Cutting insert and milling cutter including same
US20150336187A1 (en) * 2012-12-24 2015-11-26 Taegutec Ltd. Cutting insert and milling cutter including same
US9120154B2 (en) * 2013-02-14 2015-09-01 Iscar, Ltd. Single-sided square-shaped indexable cutting insert and cutting tool
US20150037106A1 (en) * 2013-07-30 2015-02-05 Kennametal Inc. High-speed milling cutter and cutting insert therefor
US9475136B2 (en) * 2013-07-30 2016-10-25 Kennametal Inc. High-speed milling cutter and cutting insert therefor
USD712444S1 (en) * 2013-12-03 2014-09-02 Hard Metal Advantage, L.L.C. Multi-sided cutting chip
US20150158091A1 (en) * 2013-12-11 2015-06-11 Iscar, Ltd. Cutting Insert Having A Dovetail Anti-Slip Arrangement
US9481038B2 (en) * 2013-12-11 2016-11-01 Iscar, Ltd. Cutting insert having a dovetail anti-slip arrangement
US20170291233A1 (en) * 2014-09-24 2017-10-12 Sandvik Intelectual Property Ab Cutting tool and a cutting insert for chip-removing tool
US10252355B2 (en) * 2014-09-24 2019-04-09 Sandvik Intellectual Property Ab Cutting tool and a cutting insert for chip-removing tool
US20170326656A1 (en) * 2015-05-19 2017-11-16 Tungaloy Corporation Tool body and cutting tool
US10239134B2 (en) * 2015-05-19 2019-03-26 Tungaloy Corporation Tool body and cutting tool
US20170100778A1 (en) * 2015-10-09 2017-04-13 Sandvik Intellectual Property Ab Turning Insert
US9737935B2 (en) * 2015-10-09 2017-08-22 Sandvik Intellectual Property Ab Turning insert
US20180264562A1 (en) * 2017-03-16 2018-09-20 Iscar, Ltd. Tool holder having position adjustment arrangement and cutting tool
US10144071B2 (en) * 2017-03-16 2018-12-04 Iscar, Ltd. Tool holder having position adjustment arrangement and cutting tool
US11090740B2 (en) 2019-02-12 2021-08-17 Iscar, Ltd. Rotary cutting body having insert pocket with seat surface provided with a plurality of abutment elements and rotary cutting tool
US11491560B1 (en) * 2021-07-13 2022-11-08 Taegutec Ltd. Cutting insert and rotary cutting tool including same

Also Published As

Publication number Publication date
KR20150020286A (ko) 2015-02-25
EP2858775B1 (en) 2022-10-26
CN104334302B (zh) 2017-08-25
JP2015522433A (ja) 2015-08-06
WO2013183045A1 (en) 2013-12-12
CN104334302A (zh) 2015-02-04
BR112014027164A2 (pt) 2017-06-27
EP2858775A1 (en) 2015-04-15
RU2014153153A (ru) 2016-07-27
US9573204B2 (en) 2017-02-21
CA2870797A1 (en) 2013-12-12
CA2870797C (en) 2018-03-20
US20150125225A1 (en) 2015-05-07

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