EP0370037A1 - Fraise combinee - Google Patents

Fraise combinee

Info

Publication number
EP0370037A1
EP0370037A1 EP88905789A EP88905789A EP0370037A1 EP 0370037 A1 EP0370037 A1 EP 0370037A1 EP 88905789 A EP88905789 A EP 88905789A EP 88905789 A EP88905789 A EP 88905789A EP 0370037 A1 EP0370037 A1 EP 0370037A1
Authority
EP
European Patent Office
Prior art keywords
finishing
radius
roughing
arcs
cutting
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.)
Pending
Application number
EP88905789A
Other languages
German (de)
English (en)
Inventor
Harald Kraft
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.)
Feldmuehle AG
Original Assignee
Feldmuehle AG
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 Feldmuehle AG filed Critical Feldmuehle AG
Publication of EP0370037A1 publication Critical patent/EP0370037A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/06—Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface
    • 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
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0416—Irregular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/045—Round
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/203—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/60—Roughing
    • B23C2220/605—Roughing and finishing

Definitions

  • the invention relates to an indexable insert, in particular for use as a finishing insert in cassettes of multi-tooth cutters, which are equipped with a plurality of round indexable inserts for roughing and at least one finishing insert.
  • the single tooth milling cutter which is mounted in a built-in element, can be adjusted sensitively, i.e. That is, the main cutting edge, which is spherical, can be aligned with the working plane, and this fine adjustment also compensates for the spindle camber of the machine.
  • this single-tooth milling cutter can achieve surface qualities with R a of approx. 0.4 ⁇ , i.e. H. the surface quality corresponds to that of grinding.
  • Multi-tooth milling cutters are equipped with cassettes that have round or square indexable inserts in the Take 45 and 75 degree setting angles. They are usually used for rough milling, whereby the surface quality achieved depends on the feed per tooth of the indexable insert used and the axial axial runout of the milling cutter; values of R CL between 3.2 and 12.5 ⁇ m are generally achieved.
  • Multi-tooth cutters are mainly used in the automotive industry. They are suitable for milling cylinder blocks and similar parts.
  • the surface quality achieved is R CL 12 ⁇ m.
  • the finishing operation is made possible by the fact that the cutting edge of the square finishing plate that is in use protrudes axially relative to the other cutting edges by a small amount, but is set back radially, which creates the risk that the finishing edge will follow Grinding plate is overloaded and this cutting edge wears out prematurely.
  • the invention is therefore based on the object of producing a finishing plate which, in the case of rotating tools, offers the certainty that the following roughing plate is not overloaded.
  • This object is achieved in a generic indexable insert in that the parallel cover surfaces on their circumference in each case by two opposite, an angle ⁇ enclosing circular arcs with a radius R .. and adjoining lines (4) which are in arcs with a radius r flow into and connect these arches to the arcs over a distance.
  • the radius R. of the finishing insert is preferably as large as the radius of the round roughing insert, at least it is not significantly smaller, but rather somewhat larger.
  • the finishing insert fulfills two functions. With the area of the circular arc, like any roughing insert, it performs the same chip removal, ie it roughs. The finishing takes place with the adjoining area, i.e. the line that engages a surface that has already been machined by roughing and removes the comb lines generated by the roughing. According to a preferred embodiment of the invention, the length of the line is chosen so that it is greater than the maximum possible feed, that is to say a multiple in one revolution of the path covered by the feed on the tool.
  • Fig. 1 shows a multi-tooth milling cutter schematically in a perspective view according to the prior art
  • FIG. 2 shows an enlarged detail cross section through a workpiece area, with the cutter
  • Fig. 1 has been edited.
  • Fig. 3 is a chip sequence image that when using the
  • FIG. 4 shows a multi-tooth milling cutter schematically and in perspective according to the invention
  • FIG. 5 shows an enlarged and sectioned detail of a
  • Fig. 7 the chip sequence image in cross section, which at
  • Finishing insert is created.
  • the multi-tooth milling cutter (19) according to the prior art only shows four cutting edges in a simplified form.
  • the roughing inserts (7th, 1 ⁇ ) have a cylindrical shape and thus circular arc-shaped roughing edges (22).
  • the finishing cutting plate (1) has a prismatic shape based on a square, hence a straight finishing cutting edge (23).
  • the axial Cutting area (24) is set back radially by an amount X compared to roughing cutting edges (7). As a result, the finishing cutting plate (1) is relieved of the roughing work during finishing.
  • the Schruppschneidplatte (7 ⁇ this has to take a much larger Schruppspan, than the subsequent roughing (22), the Schruppschneid panels' (7 2) and (7 3).
  • the multi-tooth milling cutter rotates in the direction (18) around the center of the spindle (17).
  • the outer regions of the cutting edges (22) of the roughing cutting inserts (7) are arranged at a distance A7 from the spindle center (17).
  • the roughing cutting edge (24) of the finishing cutting plate (1) is set back by an amount X and is at a distance A1 from the center of the spindle (17).
  • this measure substantially relieves the cutting edge (24) from roughing, while the cutting edge (23) is finishing.
  • the cutting insert used according to the invention is a combined roughing and finishing cutting insert (1). It is made by a basic roughing part (11) in the form of the roughing inserts (7) with two diagonally formed opposite arranged sizing lugs (12, 12 ') and has two parallel cover surfaces (2).
  • the cover surfaces. (2) are formed by two circular arcs (3, 3 ') with a radius R, which lie opposite one another and form an angle ⁇ . (Rough cutting 22) and lines (4, 4 ') (finishing cutting 23) adjoining it at (8, 8'), which open into arches (5, 5 ') with a radius r and these arches (5, 5') Connect over a distance (6, 6 ') with the arcs (3, 3'), limited.
  • the roughing cutting edge (22) of the basic roughing part (11) works in the line area (3) just like the other roughing cutting plates (7), so that there is a homogeneous and uniform load on all cutting edges, which means that no different cutting forces and different signs of wear result caused vibrations can arise.
  • the finishing cutting edge (23), which is formed by the finishing attachment (12, 12 ') in the area of the lines (4, 4'), can - as it were in one go - work through the roughing combs (14).
  • the size cutting edge (23) can have a large crowning R_.
  • the length of this finishing cutting edge (23) is designed in such a way that an overlap of more than one is produced by the preceding roughing cutting edges Roughing combs (14) takes place.
  • the radii r, to form the arches (5, 5 ') can of course be smaller than shown, so that this results in a longer line (4, 4') or finishing edge (23, 23 ').
  • the workpiece feed (16) per chip S1, S2, S3, S4 and S5 is shown enlarged in FIG. 7.
  • the centers of the individual inserts are M7. j , 7 2 , 7 3 and M1 denotes.
  • Their geometrical location in the multi-tooth milling cutter (20) is a single circular arc (26) - compare FIG. 4 -.

Abstract

Dans le cas du fraisage avec des fraises multidents, les tranchants sont disposés dans des cassettes. A cet effet, on monte plusieurs tranchants circulaires pivotants (7) et au moins un tranchant finisseur (1), lesquels sont munis de surfaces de recouvrement parallèles. Le tranchant finisseur (1) possède à sa périphérie deux arcs de cercle (3, 3') se faisant face et définissant un angle alpha, qui présentent un rayon important (R1) et auxquels se raccordent des lignes (4, 4') qui débouchent avec un faible rayon (r) sur les arcs (5, 5') qui, à leur tour, sont reliés par une droite (6, 6') avec les grands arcs de cercle (3, 3'). Le rayon important (R1) des grands arcs de cercle (3, 3') du tranchant finisseur (1) correspond ainsi au rayon des tranchants circulaires de dégrossissage (7), et la ligne (4, 4') se raccordant aux grands arcs de cercle (3, 3') constitue la coupe de finition (23, 23').
EP88905789A 1987-07-21 1988-06-30 Fraise combinee Pending EP0370037A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873724006 DE3724006A1 (de) 1987-07-21 1987-07-21 Kombifraeser
DE3724006 1987-07-21

Publications (1)

Publication Number Publication Date
EP0370037A1 true EP0370037A1 (fr) 1990-05-30

Family

ID=6331978

Family Applications (2)

Application Number Title Priority Date Filing Date
EP88110507A Expired - Lifetime EP0300247B1 (fr) 1987-07-21 1988-06-30 Fraise
EP88905789A Pending EP0370037A1 (fr) 1987-07-21 1988-06-30 Fraise combinee

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP88110507A Expired - Lifetime EP0300247B1 (fr) 1987-07-21 1988-06-30 Fraise

Country Status (6)

Country Link
EP (2) EP0300247B1 (fr)
JP (1) JPH02501462A (fr)
AT (1) ATE64558T1 (fr)
DE (2) DE3724006A1 (fr)
ES (1) ES2022537B3 (fr)
WO (1) WO1989000473A1 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178498A (en) * 1991-06-11 1993-01-12 The United States Of America As Represented By The United States Department Of Energy X-Z-Theta cutting method
SE509224C2 (sv) * 1994-05-19 1998-12-21 Sandvik Ab Vändskär
FR2789613B1 (fr) * 1999-02-17 2001-05-04 Peugeot Citroen Automobiles Sa Procede de surfacage d'un objet, notamment d'un bloc-cylindres, et fraise pour la mise en oeuvre de ce procede
DE10131357A1 (de) * 2001-06-28 2003-01-16 Fette Wilhelm Gmbh Schneidwerkzeug mit Schnittaufteilung
US7513319B2 (en) 2004-06-08 2009-04-07 Devall Donald L Reamer bit
US7228922B1 (en) * 2004-06-08 2007-06-12 Devall Donald L Drill bit
JP4810903B2 (ja) * 2005-07-15 2011-11-09 株式会社タンガロイ 転削工具および高送り用チップ
DE102007034087B4 (de) * 2007-06-28 2009-09-10 Itsko Polevoi Fräserwerkzeug
DE212009000076U1 (de) * 2008-06-06 2011-03-03 Vilmanyi, Gabor Fräswerkzeug
CN102046313B (zh) * 2008-06-26 2013-03-20 塞科机床公司 切削刀片套组、铣削刀具和切削刀片
DE202008018646U1 (de) * 2008-08-31 2017-03-24 Iscar Ltd. Schneideinsatz
AT13251U1 (de) * 2012-08-28 2013-09-15 Ceratizit Luxembourg S A R L Fräswerkzeugaufnahme und ovale doppelseitige Wendeschneidplatte
SE536855C2 (sv) * 2013-01-23 2014-10-07 Sandvik Intellectual Property Fräsverktyg med underläggsplatta inbegripande en hjälpskäregg
DE102022116414A1 (de) 2022-06-30 2024-01-04 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Fräswerkzeug und Verfahren zum Auslegen eines solchen Fräswerkzeugs

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1460029A (en) * 1922-10-30 1923-06-26 Mattson Julius Milling-machine cutter
US1460030A (en) * 1922-12-21 1923-06-26 Mattson Julius Milling-machine cutter
US4093392A (en) * 1975-04-10 1978-06-06 The Valeron Corporation Milling cutter
DE2615913A1 (de) * 1976-04-10 1977-10-20 Ingersoll Mach & Tool Co Schrupp- und schlichtmesserkopf
DE3210059A1 (de) * 1982-03-19 1983-09-29 Fritz Hartmann Präzisionswerkzeuge GmbH & Co KG, 7253 Renningen Planfraeser
JPS58171206A (ja) * 1982-03-30 1983-10-07 Mitsubishi Metal Corp スロ−アウエイチツプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8900473A1 *

Also Published As

Publication number Publication date
EP0300247B1 (fr) 1991-06-19
DE3724006A1 (de) 1989-02-02
DE3863318D1 (de) 1991-07-25
EP0300247A1 (fr) 1989-01-25
ES2022537B3 (es) 1991-12-01
ATE64558T1 (de) 1991-07-15
JPH0379129B2 (fr) 1991-12-17
WO1989000473A1 (fr) 1989-01-26
JPH02501462A (ja) 1990-05-24

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