EP2081718A1 - Fraise dégrossisseuse et finisseuse - Google Patents

Fraise dégrossisseuse et finisseuse

Info

Publication number
EP2081718A1
EP2081718A1 EP07817605A EP07817605A EP2081718A1 EP 2081718 A1 EP2081718 A1 EP 2081718A1 EP 07817605 A EP07817605 A EP 07817605A EP 07817605 A EP07817605 A EP 07817605A EP 2081718 A1 EP2081718 A1 EP 2081718A1
Authority
EP
European Patent Office
Prior art keywords
milling
cutter
roughing
milling cutter
finishing
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.)
Withdrawn
Application number
EP07817605A
Other languages
German (de)
English (en)
Inventor
Zdenek Vratny
Georg Finger
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.)
Hofmann & Vratny oHG
Original Assignee
Hofmann & Vratny oHG
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 Hofmann & Vratny oHG filed Critical Hofmann & Vratny oHG
Publication of EP2081718A1 publication Critical patent/EP2081718A1/fr
Withdrawn legal-status Critical Current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
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0485—Helix angles
    • B23C2210/0492—Helix angles different
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/08—Side or top views of the cutting edge
    • B23C2210/086—Discontinuous or interrupted cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/08—Side or top views of the cutting edge
    • B23C2210/088—Cutting edges with a wave form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/20—Number of cutting edges
    • B23C2210/203—Number of cutting edges four
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/28—Arrangement of teeth
    • B23C2210/282—Unequal angles between the cutting edges, i.e. cutting edges unequally spaced in the circumferential direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/32—Details of teeth
    • B23C2210/325—Different teeth, i.e. one tooth having a different configuration to a tooth on the opposite side of the flute
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/48—Chip breakers
    • B23C2210/486—Chip breaking grooves or depressions
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2250/00—Compensating adverse effects during milling
    • B23C2250/16—Damping vibrations

Definitions

  • the invention relates to a finishing / roughing cutter according to the preamble of claim 1.
  • Such cutters usually have a cylindrical tool shank which can be clamped at one, its upper end, into a milling machine. At this tool shank is followed by a milling area, which has a plurality of milling surfaces located in the Ur ⁇ fangscardi of the cutter, each with a milling edge. Each milling surface extends in a helix with an inclined angle with respect to the central axis of the milling cutter toward the other, lower end of the milling cutter and ends there on the face of the milling cutter in a cutting edge located in a plane perpendicular to the central axis of the milling cutter ,
  • the milling surfaces are designed as roughing surfaces with a roughened surface or with a serrated edge, which is usually referred to as toothing. With such roughing cutters, workpieces can first be rough cut.
  • finishing mill milling surfaces usually have no teeth but are smooth; These finishing cutters are used for smoothing the surfaces of a workpiece which are pre-milled, for example by a roughing cutter.
  • Finishing / roughing cutters combine the function of a roughing cutter and a finishing cutter.
  • these milling cutters have a milling surface formed and serve as Simple milling surface, wherein the adjacent milling surface is formed as a roughing milling surface with a toothing.
  • Cutters are usually made from a pressed metal powder which is subsequently sintered.
  • the cutter is therefore very hard, but also very brittle at the same time. At high loads, which are exerted on the cutter, this gets into vibration by these loads, which can definitely lead to the breakage of the milling cutter. Thus, it is necessary to achieve a smooth running of the milling cutter when machining workpieces.
  • finishing / roughing cutters can only be operated at relatively low feed rates when machining workpieces due to the above-mentioned problems.
  • the invention has for its object to provide a sizing / roughing, with a virtually vibration-free quiet running can be achieved. Furthermore, the loads of the milling cutter should be reduced in particular by the configuration of the helically extending milling surfaces.
  • each helical milling surface alternately roughing and sizing areas, which follow each other in the axial direction of the cutter at relatively short intervals.
  • Each finishing area of a milling surface in the axial direction of the milling cutter lies substantially at the same axial height of a roughing area of an adjacent milling area and preferably covers the roughing area of the adjacent milling area or even slightly overlaps the roughing area of the adjacent milling area on both sides.
  • a further improvement in the stability of the milling cutter can be achieved if it is unevenly divided.
  • An uneven pitch of the milling cutter means that the cutting edges on the face of the milling cutter are not arranged at regular angular intervals.
  • the pitch angle of adjacent milling surfaces have different pitch angles.
  • two opposite milling surfaces have a pitch of 30 ° with respect to the center axis of the cutter, while the other two milling surfaces have a dynamic pitch angle that is about 30 ° in the area of the face of the cutter and continuously increases toward the tool shank up to, for example, 35 °.
  • the cutting edges in the end face of the milling cutter lie radially in pairs opposite each other, wherein the cutting edges of the milling surfaces are offset by a few degrees, for example 5 °, with the dynamic pitch angle in the circumferential direction in relation to the cutting edges of the milling surface with a constant pitch angle.
  • the distance between the cutting edges of the With this configuration, milling surfaces become increasingly narrow in the direction of the clamping end of the milling cutter, so that shorter chips are also produced here.
  • Cutters with unequal pitch are known per se, but this uneven pitch in conjunction with the configuration of the milling surfaces with alternating finishing and roughing areas gives an additional advantageous effect in that practically the cutter no longer vibrates, so that a particularly smooth running is generated.
  • uneven pitch roughing / roughing cutters may be milling cutters having two, four, six, eight, etc. milling surfaces.
  • the machining time of a workpiece can be reduced by up to 30% compared to conventional milling cutters, the workpiece, as already mentioned, having a smooth surface, which frequently does not have to be reworked.
  • Figure 1 is a view of a finishing / roughing cutter with four helically extending milling surfaces according to the invention
  • FIG. 2 shows a detail view of alternating roughing and finishing areas along a milling surface in the milling cutter according to FIG. 1;
  • FIG. 3 shows a development of the four milling surfaces of the milling cutter according to FIG. 1;
  • Figure 4 is a plan view of the end face of the cutter with the located in this cutting.
  • a finishing / roughening cutter 1 has, according to FIG. 1, a cylindrical tool shank 2, which is clamped with its upper end in FIG. 1 into a milling machine (not shown here).
  • the adjoining the smooth cylindrical tool shank 2 region of the milling cutter 1 is provided as a milling section 3 with four angularly along the circumference of the milling cutter offset milling surfaces 4, which are located in the periphery of the milling cutter and band-shaped from a clamping end of the tool shank 2 opposite End face 5 each extend in a screw gear in the direction of the upper end of the milling area.
  • the milling surfaces each have a milling edge 6. Between adjacent milling surfaces 4, respectively, hollow chip removal grooves 7 are located, via which the chip groove arising during milling is removed.
  • the milling surfaces 4 terminate in the end face 5 of the milling cutter in each case in a cutting edge;
  • each milling surface 4 alternately has short roughing regions 11 and sizing regions 12 in the axial longitudinal direction of the milling cutter 1.
  • the roughing regions 11 cover in the axial direction of the milling cutter, for example, a length of 5 mm, the sizing regions 12 a range of for example 6 mm.
  • the trailing sizing area 12 seen in the axial direction of the milling cutter, cover the roughing areas 11 of a circumferentially adjacent leading milling surface 4, or overlap on both sides, as this by the dotted lines 13 and 14 is shown in FIG.
  • the mill 1 as known per se, an uneven pitch, that is, that the cutting edges 8-1 of two radially opposite milling surfaces 8-1 and 8-2 in the circumferential direction of the milling cutter 1 have an angle different from 90 ° ,
  • the angle between the cutting edge 8-1 and the cutting edge 8-2 is 95 °
  • the angle between this second cutting edge 8-2 and the subsequent cutting edge 8-1 is 85 ° and so on.
  • the milling surfaces 4 with the cutting edges 8-1 relative to the central axis of the milling cutter 1 a pitch angle of 30 ° in this case
  • the milling surfaces with their cutting 8-2 a different pitch angle, which is 30 ° in the region of the front page continuously increased in this case 35 °, as this is exaggerated in Figure 3 is shown.
  • the numerical values given are merely exemplary; Among other things, they depend on the material of the workpiece to be machined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)

Abstract

Fraise dégrossisseuse et finisseuse (1), présentant une queue d'outil cylindrique (2) à laquelle se raccorde une région de fraisage (3) qui présente plusieurs surfaces de fraisage (4) situées dans la direction circonférentielle de la fraise. Ces surfaces de fraisage s'étendent en hélice en direction de la queue d'outil avec un angle incliné par rapport à l'axe médian de la fraise. Chaque surface de fraisage (4) présente alternativement des régions dégrossisseuses (11) et des régions finisseuses (12), chaque région finisseuse d'une surface de fraisage se situant, dans la direction axiale de la fraise, sensiblement à la même hauteur axiale qu'une région dégrossisseuse d'une surface de fraisage voisine. De préférence, la région finisseuse (12) d'une surface de fraisage (4) recouvre ou encore chevauche, dans la direction axiale de la fraise (1), la région dégrossisseuse (11) de la surface de fraisage (4) voisine dans la direction circonférentielle de la fraise (1).
EP07817605A 2006-10-28 2007-10-01 Fraise dégrossisseuse et finisseuse Withdrawn EP2081718A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200620016531 DE202006016531U1 (de) 2006-10-28 2006-10-28 Schlicht-/Schruppfräser
PCT/DE2007/001763 WO2008052503A1 (fr) 2006-10-28 2007-10-01 Fraise dégrossisseuse et finisseuse

Publications (1)

Publication Number Publication Date
EP2081718A1 true EP2081718A1 (fr) 2009-07-29

Family

ID=38289168

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07817605A Withdrawn EP2081718A1 (fr) 2006-10-28 2007-10-01 Fraise dégrossisseuse et finisseuse

Country Status (3)

Country Link
EP (1) EP2081718A1 (fr)
DE (1) DE202006016531U1 (fr)
WO (1) WO2008052503A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8366354B2 (en) 2009-02-20 2013-02-05 Kennametal Inc. Rotary cutting tool with chip breaker pattern
DE102009002738A1 (de) 2009-03-07 2010-09-23 Gühring Ohg Schaftfräser
DE102012019804B4 (de) * 2012-10-10 2021-05-12 Hufschmied Zerspanungssysteme Gmbh Zerspanungswerkzeug, insbesondere Stirnfräser zur Bearbeitung von faserverstärkten Werkstoffen
DE102013002730A1 (de) 2013-02-16 2014-08-21 Hans-Jürgen Gittel Fräswerkzeug zum Schruppen und Schlichten von Werkstücken
JP6221660B2 (ja) * 2013-11-12 2017-11-01 三菱マテリアル株式会社 ラフィングエンドミル
US10118236B2 (en) * 2014-09-26 2018-11-06 Kennametal Inc. Rotary cutting tool
IL254172B (en) 2017-08-27 2022-03-01 Hanita Metal Works Ltd Solid edge grinder with complex surface cleaning
CZ201933A3 (cs) * 2019-01-21 2020-06-03 Václav Diviš Kulová fréza
CN111015142A (zh) * 2019-12-23 2020-04-17 浙江浪潮精密机械有限公司 一种硬质合金木工开料铣刀及其加工工艺
WO2022113358A1 (fr) * 2020-11-30 2022-06-02 オーエスジー株式会社 Fraise en bout
US11865629B2 (en) 2021-11-04 2024-01-09 Kennametal Inc. Rotary cutting tool with high ramp angle capability

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US3129492A (en) * 1961-04-25 1964-04-21 Albert Strasmann Prazisions We Milling cutter
DE7109760U (de) * 1970-03-14 1973-05-30 Marwin Cutting Tools Ltd Bestueckungsteil aus wolframkarbid oder keramischem hartschneidenmaterial fuer einen spanbrecher
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
DE3706282A1 (de) * 1986-02-28 1987-09-03 Izumo Sangyo Kk Umlaufendes schneidwerkzeug
US20020090273A1 (en) * 2001-01-10 2002-07-11 Serwa Ronald K. Roughing and finishing rotary tool apparatus and method
US7001113B2 (en) * 2001-09-10 2006-02-21 Flynn Clifford M Variable helix cutting tools
DE102005002698B4 (de) * 2005-01-19 2007-06-21 Franken GmbH + Co KG Fabrik für Präzisionswerkzeuge Fräswerkzeug
US7544021B2 (en) * 2005-11-01 2009-06-09 Berkshire Precision Tool. Llc Rotary cutting tool with non-uniform distribution of chip-breaking features
US20070280792A1 (en) * 2006-06-01 2007-12-06 Onsrud Cutter Lp Polycrystalline diamond tool for cutting
IL177336A (en) * 2006-08-07 2013-05-30 Hanita Metal Works Ltd Anti-vibration stabilized finger milling
DE202007008896U1 (de) * 2007-06-15 2007-08-23 Speed Tiger Precision Technology Co., Ltd. Fräser

Non-Patent Citations (1)

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Title
See references of WO2008052503A1 *

Also Published As

Publication number Publication date
DE202006016531U1 (de) 2007-07-19
WO2008052503A1 (fr) 2008-05-08

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