US3393435A - Device for locking a cutting plate onto the body of a toolholder - Google Patents

Device for locking a cutting plate onto the body of a toolholder Download PDF

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Publication number
US3393435A
US3393435A US673097A US67309767A US3393435A US 3393435 A US3393435 A US 3393435A US 673097 A US673097 A US 673097A US 67309767 A US67309767 A US 67309767A US 3393435 A US3393435 A US 3393435A
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United States
Prior art keywords
plug
cutting plate
toolholder
hole
locking
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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.)
Expired - Lifetime
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US673097A
Inventor
Guy J Viellet
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D Electro Metallurg SA Soc Ind
Industrielle D'electro-Metallurgie SA Ste
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D Electro Metallurg SA Soc Ind
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Publication of US3393435A publication Critical patent/US3393435A/en
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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
    • B23B27/1662—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
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/16—Shims
    • 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
    • Y10T407/2274—Apertured tool
    • Y10T407/2276—Apertured tool with means projecting through aperture to force tool laterally against reaction surface
    • Y10T407/2278—Tilting clamp element and separate means to tilt same

Definitions

  • the present invention relates to toolholders for machine tools of the kind in which a cutting plate is locked to the tool body by means of a bed 'plate and a tiltable plug inserted through a hole in the body.
  • the end of the plug remote from the cutting plate has an inclined face and the plug itself has an orientation element in the form of a spring which is matchable with a housing in the hole in the tool body.
  • a pressure member is inserted through a tapped hole in the bottom of the tool body and has a pointed end arranged to abut against the inclined face of the plug so as to effect the locking action.
  • the present invention relates to a device for locking a cutting plate to the body of a toolholder with the aid of a bed plate connected to the body and of a tiltable plug inserted in a hole in the latter.
  • the invention accordingly consists in the fact that the end of said plug remote from said cutting plate, has a face inclined to the general axis of said plug, said plug having mounted on its periphery an orientation element, and wherein said hole is provided with a corresponding orientation housing for said orientation element, and a pressure means having an end thereof applicable against said inclined face of said plug at a point remote from the longitudinal axis of said plug.
  • FIGURE 1 shows an exploded view in perspective of one embodiment of the invention
  • FIGURE 2 shows a sectional view along line IIII of FIGURE 1, of the assembled device.
  • the body 1 of the toolholder has a steep-angled recess 2, with a triangular base 3, intended to receive a bed plate 4 and a cutting plate 5.
  • a hole 6 is bored in the toolholder 1 substantially in the centre of the base 3.
  • a groove-like housing 7 is formed axially in the wall.
  • the hole 6 has a tapped enlargement 8, which is more clearly visible in FIGURE 2.
  • the cutting plate 5 is bored at 9 and the bed plate 4 is bored at 10. This latter preferably has a diameter greater than the diameter of the hole 9, but it also has, on the side of the face of the bed plate 4 intended to rest on the base 3, a constriction 11.
  • a plug 12 for insertion in holes 6, 10 and 9 passing through the constriction 11, is constituted in the following manner. It has, in its upper part a head 12a whose top is flat and whose sides are rounded. This head is connected to a cylindrical body 12b of diameter smaller than that of the constriction 11. Below the body 12b is a shoulder 120 which is extended in the axial direction "ice to form a part-cylindrical base 12d whose diameter is greater than that of the hole 6 of the toolholder, but smaller than that of the tapped enlargement 8.
  • the cylindrical base 12d is terminated by a face which is inclined with respect to the general axis of the plug. This face is not only inclined but also concave as shown in FIGURE 2, in planes perpendicular to the axis.
  • the shape and inclination given to the face 122 correspond to the profile of the pointed end 13a of a set screw 13 which is screwable into the tapped enlargement 8.
  • the end 13a is in reality the active end of the screw 13 whose function will be explained later.
  • a recess 14 which extends from the head 12a to the base 12d.
  • This recess is arranged to receive a resilient wire spring 15, which as a whole is concave, and'which projects at its centre away from the body 12b.
  • the lower end of the spring 15 is folded over and is a reasonably tight fit at 16 in a radial hole provided therefor.
  • the spring 15 is thus fixed to the plug 12, whilst retaining resilience, in its median part, under the action of a radial stress.
  • the plug 12 is driven into the hole 6, through the tapped enlargement 8, until the shoulder 12c is arrested by the edge of the hole 6.
  • the groove 7 of this latter must be made to correspond to the spring 15 which then acts as an orientation element in the circular direction.
  • the bed plate 4 is placed in position and it is applied against the base 3; the constriction 11 then compresses the spring 15.
  • the cutting plate 5 is positioned and the set screw 13 is screwed in until its active end 13a meets the inclined face 12e of the screw-cutting tap.
  • the contact zone between the face 12e and the set screw 13 is thrown off centre on the side which is opposite, with respect to the axis of the plug 12, to the vertical wall 2a of the recess 2.
  • the screw 13 tilts the plug as is shown in FIGURE 2 by the angular space between the axes drawn before and after tightening.
  • the rounded side of the head 12a is applied against the internal face of the hole 9 of the cutting plate 5. This latter is held on the bed plate 4 and is strongly urged against the vertical wall 2a of the recess 2.
  • the device of the invention gives the followin advantages:
  • the locking is effected by direct support of the surfaces of the plug 12 and the cutting plate, with neither sliding nor friction, both of which cause wear and tear.
  • the tightening is positive and controllable since it follows directly from the screwing of the set screw which may be measured, if desired, with a torque meter.
  • the cutting stress is directed in the same direction as the tightening stress, to which it is added.
  • A”devi'ce for locking a cutting'plate'to' the body of a toolholder with the aid of a bed plate connected to the body and a tiltable plug inserted in a hole in the latter, wherein the end of said plug remote from said cutting plate, has a face inclined to the general axis of said plug, said plug having mounted on its periphery an orientation element, wherein said hole is provided with a corresponding orientation housing for said orientation ele-' ment, and a pressure means having an end thereof applicable against said inclined face of said plug at a point remote from the longitudinal axis of said plug.
  • orientation element consists of an elongated resilient spring, disposed substantially along a generatrix of said plug and partly inserted in a recess therein, said spring also being able to penetrate into said orientation housing of said body[ 3.
  • end of said hole in said body, remote from said cutting plate, is tapped to receive a pointed end of a set screw constituting said pressure means, said pointed end being abuttable against said inclined face of said plug.

Description

July 23, 1968 G. J. VIELLET 3,393,435
DEVICE FOR LOOKING A CUTTING PLATE ONTO THE BODY OF A TOOLHOLDER Filed Oct. 5, 1967 //VVE/VTOZ Guy IVIELLE-T HTTO/ZIYEVS United States Patent Claims. (or. 29-96) ABSTRACT OF THE DISCLOSURE The present invention relates to toolholders for machine tools of the kind in which a cutting plate is locked to the tool body by means of a bed 'plate and a tiltable plug inserted through a hole in the body. According to this invention, the end of the plug remote from the cutting plate has an inclined face and the plug itself has an orientation element in the form of a spring which is matchable with a housing in the hole in the tool body. A pressure member is inserted through a tapped hole in the bottom of the tool body and has a pointed end arranged to abut against the inclined face of the plug so as to effect the locking action.
The present invention relates to a device for locking a cutting plate to the body of a toolholder with the aid of a bed plate connected to the body and of a tiltable plug inserted in a hole in the latter.
It is an object of the invention to provide such a device that will be effective in operation and simple to use.
The invention accordingly consists in the fact that the end of said plug remote from said cutting plate, has a face inclined to the general axis of said plug, said plug having mounted on its periphery an orientation element, and wherein said hole is provided with a corresponding orientation housing for said orientation element, and a pressure means having an end thereof applicable against said inclined face of said plug at a point remote from the longitudinal axis of said plug.
In order that the invention may be more readily understood, reference will now be made to the accompanying drawings, which show one embodiment thereof, by way of example, and in which:
FIGURE 1 shows an exploded view in perspective of one embodiment of the invention, and
FIGURE 2 shows a sectional view along line IIII of FIGURE 1, of the assembled device.
Referring now to the drawings, the body 1 of the toolholder has a steep-angled recess 2, with a triangular base 3, intended to receive a bed plate 4 and a cutting plate 5.
A hole 6 is bored in the toolholder 1 substantially in the centre of the base 3. In the upper part of the hole 6, a groove-like housing 7 is formed axially in the wall. In its lower part, remote from the base 3, the hole 6 has a tapped enlargement 8, which is more clearly visible in FIGURE 2.
The cutting plate 5 is bored at 9 and the bed plate 4 is bored at 10. This latter preferably has a diameter greater than the diameter of the hole 9, but it also has, on the side of the face of the bed plate 4 intended to rest on the base 3, a constriction 11.
A plug 12 for insertion in holes 6, 10 and 9 passing through the constriction 11, is constituted in the following manner. It has, in its upper part a head 12a whose top is flat and whose sides are rounded. This head is connected to a cylindrical body 12b of diameter smaller than that of the constriction 11. Below the body 12b is a shoulder 120 which is extended in the axial direction "ice to form a part-cylindrical base 12d whose diameter is greater than that of the hole 6 of the toolholder, but smaller than that of the tapped enlargement 8.
The cylindrical base 12d is terminated by a face which is inclined with respect to the general axis of the plug. This face is not only inclined but also concave as shown in FIGURE 2, in planes perpendicular to the axis.
The shape and inclination given to the face 122 correspond to the profile of the pointed end 13a of a set screw 13 which is screwable into the tapped enlargement 8. The end 13a is in reality the active end of the screw 13 whose function will be explained later.
Along a generatrix of the plug 12 is a recess 14 which extends from the head 12a to the base 12d. This recess is arranged to receive a resilient wire spring 15, which as a whole is concave, and'which projects at its centre away from the body 12b. The lower end of the spring 15 is folded over and is a reasonably tight fit at 16 in a radial hole provided therefor.
The spring 15 is thus fixed to the plug 12, whilst retaining resilience, in its median part, under the action of a radial stress.
The use of the device of the invention is as follows:
The plug 12 is driven into the hole 6, through the tapped enlargement 8, until the shoulder 12c is arrested by the edge of the hole 6. Of course, the groove 7 of this latter must be made to correspond to the spring 15 which then acts as an orientation element in the circular direction.
The bed plate 4 is placed in position and it is applied against the base 3; the constriction 11 then compresses the spring 15. The cutting plate 5 is positioned and the set screw 13 is screwed in until its active end 13a meets the inclined face 12e of the screw-cutting tap.
Due to the constitution of the plug 12, the contact zone between the face 12e and the set screw 13 is thrown off centre on the side which is opposite, with respect to the axis of the plug 12, to the vertical wall 2a of the recess 2. As soon as a tightening stress is exerted, the screw 13 tilts the plug as is shown in FIGURE 2 by the angular space between the axes drawn before and after tightening. The rounded side of the head 12a is applied against the internal face of the hole 9 of the cutting plate 5. This latter is held on the bed plate 4 and is strongly urged against the vertical wall 2a of the recess 2.
The device of the invention gives the followin advantages: The locking is effected by direct support of the surfaces of the plug 12 and the cutting plate, with neither sliding nor friction, both of which cause wear and tear. The tightening is positive and controllable since it follows directly from the screwing of the set screw which may be measured, if desired, with a torque meter. The cutting stress is directed in the same direction as the tightening stress, to which it is added.
On the other hand, the spring 15, compressed by the bed plate 4 holds the latter on the toolholder whilst is returned or replaced the cutting plate 5.
It will be noted that the orientation of the plug 12 could be effected with the aid of means other than the spring 15, playing an equivalent role from this point of view, in the same way as the set screw 13 could be replaced by a different pressure means which would exert an eccentric force at the desired spot on the inclined face 122.
It will be apparent that different modifications may be given to the shape of the members and to their relative arrangements; the invention is, therefore, not limited to the embodiment described and shown but covers all the modifications or equivalents which would not depart from its scope as defined by the appended claims.
I claim:
1. "A"devi'ce for locking a cutting'plate'to' the body of a toolholder with the aid of a bed plate connected to the body and a tiltable plug inserted in a hole in the latter, wherein the end of said plug remote from said cutting plate, has a face inclined to the general axis of said plug, said plug having mounted on its periphery an orientation element, wherein said hole is provided with a corresponding orientation housing for said orientation ele-' ment, and a pressure means having an end thereof applicable against said inclined face of said plug at a point remote from the longitudinal axis of said plug.
2. A device as claimed in claim 1, wherein the orientation element consists of an elongated resilient spring, disposed substantially along a generatrix of said plug and partly inserted in a recess therein, said spring also being able to penetrate into said orientation housing of said body[ 3. A device as claimed in claim 1, wherein the end of said hole in said body, remote from said cutting plate, is tapped to receive a pointed end of a set screw constituting said pressure means, said pointed end being abuttable against said inclined face of said plug.
4. A device as claimed in claim 3, wherein said set screw is disposed coaxially with said plug, and said inclined face of said plug is also concave in planes perpendicular to the longitudinal axis of said plug.
5. A device as claimed in claim 2, wherein said orientation spring is situated in partin a regionvof said plug, surrounded by said bed plate and said bed-plate has a constriction to compress said spring when said device is assembled.
References Cited UNITED STATES PATENTS 3,137,059 6/1964 Hertel 2996 3,226,797 1/1966 Hertel 2996 3,289,272 12/1966 Stier 2996 3,320,654 5/1967 Lovendahl 2996 3,341,920 9/1967 Kelm 2996 3,341,921 9/1967 Weller 2996 HARRISON L. HINSON, Primary Examiner.
US673097A 1966-10-10 1967-10-05 Device for locking a cutting plate onto the body of a toolholder Expired - Lifetime US3393435A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR79297A FR1503678A (en) 1966-10-10 1966-10-10 Device for blocking a cutting insert on the body of a tool holder

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US3393435A true US3393435A (en) 1968-07-23

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US (1) US3393435A (en)
BE (1) BE704229A (en)
CH (1) CH457083A (en)
DE (1) DE1602843C3 (en)
DK (1) DK120006B (en)
FR (1) FR1503678A (en)
GB (1) GB1173689A (en)
LU (1) LU54530A1 (en)
NL (1) NL155206B (en)
SE (1) SE358573B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526025A (en) * 1968-01-29 1970-09-01 Valeron Corp Split pin insert lock
US5704736A (en) * 1995-06-08 1998-01-06 Giannetti; Enrico R. Dove-tail end mill having replaceable cutter inserts
US20070086863A1 (en) * 2005-10-17 2007-04-19 Vichente Tipu Cutting tool with locking pin
US20080170918A1 (en) * 2007-01-17 2008-07-17 James Francis Farrell Toolholder
WO2016012996A1 (en) * 2014-07-23 2016-01-28 Iscar Ltd. Turning and face grooving tool having a pin clamping mechanism
US20160288216A1 (en) * 2013-11-29 2016-10-06 Taegutec Ltd. Cutting tool assembly and shank
US20180085832A1 (en) * 2016-09-13 2018-03-29 Kennametal Inc. Tool holder for an indexable cutting insert and cutting tool
US20220176464A1 (en) * 2020-12-09 2022-06-09 Ceratizit Luxembourg S.A.R.L. Clamping device and cutting tool

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4872584U (en) * 1972-11-29 1973-09-11
SE378370B (en) * 1974-10-18 1975-09-01 Sandvik Ab

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137059A (en) * 1957-12-10 1964-06-16 Hertel Karl Tool holder
US3226797A (en) * 1963-03-12 1966-01-04 Hertel Karl Cutting body and chuck construction
US3289272A (en) * 1964-10-13 1966-12-06 Willeys Carbide Tool Co Cutting tools with throw-away inserts
US3320654A (en) * 1965-02-08 1967-05-23 Futurmill Inc Tool holder arrangement
US3341920A (en) * 1965-02-16 1967-09-19 Gen Electric Cutting tool
US3341921A (en) * 1966-01-10 1967-09-19 Gen Electric Cutting insert

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3137059A (en) * 1957-12-10 1964-06-16 Hertel Karl Tool holder
US3226797A (en) * 1963-03-12 1966-01-04 Hertel Karl Cutting body and chuck construction
US3289272A (en) * 1964-10-13 1966-12-06 Willeys Carbide Tool Co Cutting tools with throw-away inserts
US3320654A (en) * 1965-02-08 1967-05-23 Futurmill Inc Tool holder arrangement
US3341920A (en) * 1965-02-16 1967-09-19 Gen Electric Cutting tool
US3341921A (en) * 1966-01-10 1967-09-19 Gen Electric Cutting insert

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3526025A (en) * 1968-01-29 1970-09-01 Valeron Corp Split pin insert lock
US5704736A (en) * 1995-06-08 1998-01-06 Giannetti; Enrico R. Dove-tail end mill having replaceable cutter inserts
US20070086863A1 (en) * 2005-10-17 2007-04-19 Vichente Tipu Cutting tool with locking pin
US7347650B2 (en) * 2005-10-17 2008-03-25 Vichente Tipu Cutting tool with locking pin
US20080170918A1 (en) * 2007-01-17 2008-07-17 James Francis Farrell Toolholder
US8616809B2 (en) 2007-01-17 2013-12-31 James F. Farrell Toolholder
US20160288216A1 (en) * 2013-11-29 2016-10-06 Taegutec Ltd. Cutting tool assembly and shank
JP2016538143A (en) * 2013-11-29 2016-12-08 デグテック エルティーディー Cutting tool assembly and shank
US10105760B2 (en) * 2013-11-29 2018-10-23 Taegutec Ltd. Cutting tool assembly and shank
EP3074164B1 (en) * 2013-11-29 2020-09-23 Taegutec Ltd. Cutting tool assembly
US9409236B2 (en) 2014-07-23 2016-08-09 Iscar, Ltd. Turning and face grooving tool having a pin clamping mechanism
WO2016012996A1 (en) * 2014-07-23 2016-01-28 Iscar Ltd. Turning and face grooving tool having a pin clamping mechanism
CN106536099A (en) * 2014-07-23 2017-03-22 伊斯卡有限公司 Turning and face grooving tool having a pin clamping mechanism
CN106536099B (en) * 2014-07-23 2019-07-05 伊斯卡有限公司 Turning and end face grooving tool with pin clamp system
US20180085832A1 (en) * 2016-09-13 2018-03-29 Kennametal Inc. Tool holder for an indexable cutting insert and cutting tool
US10384271B2 (en) * 2016-09-13 2019-08-20 Kennametal Inc. Tool holder for an indexable cutting insert and cutting tool
US20220176464A1 (en) * 2020-12-09 2022-06-09 Ceratizit Luxembourg S.A.R.L. Clamping device and cutting tool

Also Published As

Publication number Publication date
DK120006B (en) 1971-03-22
LU54530A1 (en) 1967-11-27
FR1503678A (en) 1967-12-01
DE1602843B2 (en) 1977-12-15
NL6713470A (en) 1968-04-11
DE1602843C3 (en) 1978-08-31
DE1602843A1 (en) 1970-09-10
GB1173689A (en) 1969-12-10
SE358573B (en) 1973-08-06
CH457083A (en) 1968-05-31
NL155206B (en) 1977-12-15
BE704229A (en) 1968-02-01

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