SE1550205A1 - Tool holder for tangential cutting insert - Google Patents

Tool holder for tangential cutting insert Download PDF

Info

Publication number
SE1550205A1
SE1550205A1 SE1550205A SE1550205A SE1550205A1 SE 1550205 A1 SE1550205 A1 SE 1550205A1 SE 1550205 A SE1550205 A SE 1550205A SE 1550205 A SE1550205 A SE 1550205A SE 1550205 A1 SE1550205 A1 SE 1550205A1
Authority
SE
Sweden
Prior art keywords
tool holder
cutting insert
shim
cutting
respect
Prior art date
Application number
SE1550205A
Other languages
English (en)
Inventor
Igor Kaufmann
Anwar Sadat Mohideen Abdul
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Publication of SE1550205A1 publication Critical patent/SE1550205A1/sv

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
    • B23B27/1618—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 characterised by having chip-breakers
    • 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
    • B23B27/1681—Adjustable position of the plate-like cutting inserts
    • 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
    • B23B27/1622—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 characterised by having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
    • B23B29/04—Tool holders for a single cutting tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0471—Square
    • 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
    • B23B2200/163—Supporting or bottom surfaces discontinuous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/3681—Split inserts, i.e. comprising two or more sections roughly equal in size and having similar or dissimilar cutting geometries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/36—Other features of cutting inserts not covered by B23B2200/04 - B23B2200/32
    • B23B2200/369—Mounted tangentially, i.e. where the rake face is not the face with the largest area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2205/00—Fixation of cutting inserts in holders
    • B23B2205/12—Seats for cutting inserts
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2228/00—Properties of materials of tools or workpieces, materials of tools or workpieces applied in a specific manner
    • B23B2228/24—Hard, i.e. after being hardened
    • 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
    • B23C5/2239—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped by a clamping member acting almost perpendicular on the cutting face
    • 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
    • B23C5/2298—Securing arrangements for bits or teeth or cutting inserts secured by resilient/flexible means
    • 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

Landscapes

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

Description

10 15 20 25 30 35 positioned obliquely With respect to one another, for the cutting insert. The obliquely positioned supporting surfaces come into contact With a side surface of the cutting insert, such that the forces acting on the cutting insert can be transmitted reliably into the tool holder. In this case, self-centering of the cutting insert on the supporting surfaces occurs. Since the bottom surface is quadrangular and its geometry thus corresponds in principle with the geometry of the side surfaces of the cutting insert, the cutting edges of the cutting insert, Which are located directly opposite the supporting region, can additionally be protected from damage by chips.
For this purpose, the bottom surface can be configured in a slightly larger manner than the side surfaces of the cutting insert With little effort, such that the bottom surface protrudes slightly beyond the cutting insert.
Provision is preferably made for the supporting region to be set back With respect to the perimeter of the bottom surface. In this Way, an encircling shoulder is created, above which the lips of the side surface Which rests on the supporting region are located.
Provision is preferably made for the supporting region to have a raised ridge Which separates the two supporting surfaces from one another. In this Way, the self- centering of the cutting insert on the supporting region is improved.
The ridge extends in this case preferably diagonally over the supporting region.
As a result, the automatic positioning of the cutting insert on the supporting region is supported.
According to one configuration of the invention, provision is made for the bottom surface to be part of a shim Which is fitted to the tool holder. This makes it possible to produce the shim from a different material than the tool holder, such that the base surface can be produced With the desired properties With little effort.
The shim may be screwed to the tool holder, such that, if necessary, it can be exchanged With little effort. If the shim consists of carbide, the bottom surface can be produced With very high hardness such that there is no or only very little Wear during operation.
The underside of the shim may have been ground in order to achieve a planar underside Which maintains tight tolerances.
According to an alternative configuration of the invention, provision is made for the bottom surface to be configured in one piece With the tool holder. In this embodiment, separate mounting of the shim is dispensed with, and the tolerances Which are associated With the attachment of the shim to the tool holder are also dispensed With. 10 15 20 25 30 In order to achieve the desired hardness of the supporting region, provision is preferably made for the bottom surface to be hardened, for example laser hardened or nitrided.
In order to achieve the abovementioned object, an assembly having a tool holder and a tangential cutting insert is also provided, with the bottom surface protruding outwardly beyond the cutting insert when viewed with respect to a plane which is defined by the exposed outer surface of the cutting insert. This ensures that the lips of the cutting insert, which are arranged along that side surface of the cutting insert which rests on the bottom surface, are protected against damage.
Provision is in this case preferably made for the length and the width of the bottom surface to be greater than the length and the width of the cutting insert supported thereon. This produces a protrusion of the bottom surface beyond the outer contour of the cutting insert both laterally and at the front, with the result that the lips of the cutting insert that face the bottom surface are protected.
Provision is preferably made for the cutting insert to have a plurality of cutting edges, with the cutting edges that face the bottom surface being arranged at a distance from the bottom surface. This ensures that the cutting edges cannot come into contact with the bottom surface of the receptacle, such that in this respect, too, the cutting edges are protected against damage.
The invention is described in the following text with reference to two embodiments which are illustrated in the drawings, in which: - Figurel shows a perspective view of a tool holder according to a first embodiment of the invention; - Figure 2 shows a side view of the tool holder from figure 1; - Figure 3 shows a front view of the tool holder from figure 1; - Figure 4 shows a plan view of the tool holder from figure l; - Figure 5 shows a plan view of a shim which is used in the tool holder from figure 1; - Figure 6 shows a side view of the shim from figure 5; - Figure 7 shows a front view of the shim from figure 5; - Figure 8 shows a section along the plane VIII-VIII in figure 5; - Figure 9 shows a section along the plane IX-IX in figure 5; 10 15 20 25 30 - Figure 10 shows a perspective view of the tool holder from figure 1 with a cutting insert fitted therein; - Figure 11 shows a side view of the tool holder with a cutting insert from figure 1 0; - Figure 12 shows a front view of the tool holder with a cutting insert from figure 10; - Figure 13 shows the detail XIII from figure 12 on an enlarged scale; - Figure 14 shows a plan view of the tool holder with a cutting insert from figure 1 0; - Figure 15 shows a perspective view of a tool holder according to a second embodiment of the invention; - Figure 16 shows a side view of the tool holder from figure 15; and - Figure 17 shows a front view of the tool holder from figure 15.
Figures 1 to 14 show a tool holder 5 according to a first embodiment. It contains a holding portion 6 which is fitted on a shank 7 which is shown broken away here.
The shank 7 can be mounted on a tool holder carrier.
The holding portion 6 of the tool holder 5 is provided with a receptacle 8 in which a cutting insert 9 (see figures 10 to 14) can be fitted.
The receptacle 8 contains a lateral bearing surface 10, a rear bearing surface 12 and a bottom surface 14. The surfaces 10, 12, 14 serve to support the cutting insert 9.
The cutting insert 9 is a tangential cutting insert as is known in principle from DE 10 2007 022 536 A1. It has two base surfaces 20 which have a generally square shape and are rotated with respect to one another. Provided between the peripheries of the base surfaces 20 are four side surfaces 22, with each side surface forming two main lips 24 with the base surfaces. A secondary lip 26 is formed in each case at the transition between adjacent side surfaces 22. Each main lip 24 merges into the adjacent secondary lip 26 via a corner radius 28. Overall, the cutting insert 9 has eight lips which are each formed by a main lip 24 and a secondary lip 26 together with the comer radius 28.
In the first embodiment, the bottom surface 14 (the lower surface in figure 1) of the receptacle 8 is a shim 30 which is configured separately from the tool holder 5 and is fitted on the latter. In plan view, the shim 30 has a quadrangular and in this 10 15 20 25 30 35 case generally parallelogram-like shape (see figure 5) and has a raised supporting region 32 Which is surrounded by an encircling shoulder 34 which is located at a lower level than the supporting region 32.
The supporting region 32 is formed by two supporting surfaces 36, positioned obliquely with respect to one another, which have a generally triangular shape, and a raised ridge 38 arranged between the two supporting surfaces 36. Said ridge extends diagonally over the bottom surface 14, specifically along the longer diagonal (see figure 5). The two supporting surfaces 36 are in this case inclined at an angle of 10° with respect to a plane which is defined by the ridge 38 or the underside of the shim 30. As can be seen in particular in figure 8, in each case a part of the bottom surface 14 drops toward the longer side peripheries on account of the inclination of the two supporting surfaces 36 toward the outside, i.e. away from the ridge 38.
The shim 30 can consist of carbide or some other suitable material with a high degree of hardness. In this way, the desired wear resistance in particular of the bottom surface 14 is achieved. Preferably, the underside 40 of the shim 30 has been ground in order to obtain a particular planar bearing surface by way of which the shim 30 is supported in the tool holder 5. In order to fasten the shim 30, use can be made of a fastening screw (not shown here) which extends through a centrally arranged opening 42.
When the tangential cutting insert 9 is arranged in the receptacle 8, it is supported by way of one of its side surfaces on the bottom surface 14 of the shim 30, in particular on the two supporting surfaces 36. The latter are configured such that the cutting edges 24, 26, which are located directly opposite the shim 30, are located at a short distance from the shoulder 34 of the shim 30 (see in particular figures 11 to 13 with the distance a indicated there).
With regard to its dimensions, the shim 30 is also configured such that it protrudes laterally beyond the cutting insert 9, in particular beyond a plane which is defined by the laterally arranged base surface 20 (see in particular figure 10) and also beyond the secondary lip 26 arranged on the front side of the tool holder. In figure 13, the lateral protrusion of the shim 30 beyond the plane defined by the corresponding base surface 20 (and thus also by the main lip 24 arranged there) is designated s. The shim 30 also protrudes forwardly, i.e. toward the observer with respect to figure 13, in the region of the secondary lip 26 shown in figure 13. As a result of the protrusion of the shim 30, the lips located opposite the shim 30 are protected well against damage by chips. In this case, the protrusion of the shim 30 is not disruptive during operation, since the inactive lips protected by the shim 30 are 10 15 set back with respect to the active lips of the cutting insert; this is produced by the fitting, inclined in two directions, of the cutting insert 9 on the tool holder 5 (see figures 11 and 12).
Figures 15 to 17 show a tool holder according to a second embodiment. The same reference signs are used for the elements known from the first embodiment, and reference is made in this respect to the statements made above.
The difference between the first and second embodiments consists in that in the second embodiment the base surface 14 is configured as an integral constituent part of the tool holder 5, i.e. directly as one of the boundary surfaces of the receptacle 8.
The geometry is the same as in the first embodiment; the base surface 14 thus has a raised supporting region with an encircling shoulder 34, two supporting surfaces 36 and the ridge 38.
In order to ensure the desired hardness of the base surface 14, the material of the tool holder 5 in the region of the base surface 14 is hardened, for example laser hardened, induction hardened or nitrided.

Claims (14)

10 15 20 25 30 Patent claims
1. A tool holder (5) having a receptacle (8) for a cutting insert (9), in particular a tangential cutting insert having eight lips, having a lateral bearing surface (10), a rear bearing surface (12) and a bottom surface (14), Wherein the bottom surface (14) is quadrangular in plan view and has a raised supporting region (32) Which has two supporting surfaces (36), positioned obliquely With respect to one another, for the cutting insert.
2. The tool holder as clairned in claim 1, Wherein the supporting region (32) is set back With respect to the perimeter of the bottom surface (14).
3. The tool holder as claimed in either of the preceding claims, Wherein the supporting region (32) has a raised ridge (38) Which separates the two supporting surfaces (36) from one another.
4. The tool holder as claimed in claim 3, Wherein the ridge (38) extends diagonally over the supporting region (32).
5. The tool holder as claimed in one of the preceding claims, Wherein the bottom surface (14) is part of a shim (30) Which is fitted to the tool holder (5).
6. The tool holder as claimed in claim 5, Wherein the shim (30) is screWed to the tool holder (5).
7. The tool holder as claimed in claim 5 or claim 6, Wherein the shim (30) consists of carbide.
8. The tool holder as claimed in one of claims 5 to 7, Wherein the underside (40) of the shim (30) has been ground.
9. The tool holder as claimed in one of claims l to 4, Wherein the bottom surface (14) is configured in one piece With the tool holder (5).
10. The tool holder as claimed in claim 9, Wherein the bottom surface (14) has been hardened.
1 1. The tool holder as claimed in claim l0, Wherein the bottom surface (14) has been laser hardened, induction hardened or nitrided.
12. An assembly having a tool holder (5) as claimed in one of the preceding claims and a tangential cutting insert (9) Which is fitted in the receptacle and rests on the bottom surface (14), Wherein the bottom surface (14) protrudes outWardly beyond the cutting insert (9) When Viewed With respect to a p1ane Which is defined by an exposed base surface (20) of the cutting insert (9).
13. The assembly as claimed in claim 12, Wherein the length and the width of the bottom surface (14) are greater than the length and the width of the cutting insert (9) supported thereon.
14. The assembly as claimed in claim 12 or claim 13, Wherein the cutting insert has a plurality of cutting edges (24, 26), With the cutting edges (24, 26) that face the bottom surface (14) being arranged at a distance from the bottom surface (14).
SE1550205A 2012-08-28 2013-08-27 Tool holder for tangential cutting insert SE1550205A1 (sv)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012017025.4A DE102012017025B4 (de) 2012-08-28 2012-08-28 Werkzeughalter für einen Schneideinsatz und Baugruppe mit einem solchen Werkzeughalter
PCT/IB2013/002622 WO2014033549A2 (de) 2012-08-28 2013-08-27 Werkzeughalter fiir tangentialschneideinsatz

Publications (1)

Publication Number Publication Date
SE1550205A1 true SE1550205A1 (sv) 2015-02-24

Family

ID=50098045

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1550205A SE1550205A1 (sv) 2012-08-28 2013-08-27 Tool holder for tangential cutting insert

Country Status (5)

Country Link
US (1) US10035195B2 (sv)
CN (1) CN105026084B (sv)
DE (1) DE102012017025B4 (sv)
SE (1) SE1550205A1 (sv)
WO (1) WO2014033549A2 (sv)

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DE102012017025B4 (de) 2012-08-28 2018-05-30 Kennametal Inc. Werkzeughalter für einen Schneideinsatz und Baugruppe mit einem solchen Werkzeughalter
US9468681B2 (en) 2013-03-01 2016-10-18 California Institute Of Technology Targeted nanoparticles
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EP2946858B1 (en) 2014-05-19 2019-07-10 Sandvik Intellectual Property AB Cutting tool insert and cutting tool insert holder
CN111643479B (zh) 2015-07-01 2023-10-27 加州理工学院 基于阳离子粘酸聚合物的递送系统
USD778330S1 (en) 2015-07-16 2017-02-07 Kennametal Inc. Double-sided tangential cutting insert
USD777230S1 (en) 2015-07-16 2017-01-24 Kennametal Inc Double-sided tangential cutting insert
US9981323B2 (en) 2015-07-16 2018-05-29 Kennametal Inc. Double-sided tangential cutting insert and cutting tool system using the same
EP3246117A1 (en) * 2016-05-20 2017-11-22 Seco Tools Ab Cutting tool and shim
WO2019241327A1 (en) 2018-06-13 2019-12-19 California Institute Of Technology Nanoparticles for crossing the blood brain barrier and methods of treatment using the same

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Also Published As

Publication number Publication date
WO2014033549A2 (de) 2014-03-06
DE102012017025B4 (de) 2018-05-30
US20150246396A1 (en) 2015-09-03
CN105026084B (zh) 2017-08-29
WO2014033549A3 (de) 2015-08-13
US10035195B2 (en) 2018-07-31
CN105026084A (zh) 2015-11-04
DE102012017025A1 (de) 2014-03-06

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