WO2016020047A1 - Outil de fraisage - Google Patents

Outil de fraisage Download PDF

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Publication number
WO2016020047A1
WO2016020047A1 PCT/EP2015/001562 EP2015001562W WO2016020047A1 WO 2016020047 A1 WO2016020047 A1 WO 2016020047A1 EP 2015001562 W EP2015001562 W EP 2015001562W WO 2016020047 A1 WO2016020047 A1 WO 2016020047A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting edge
milling tool
spirally
free end
flute
Prior art date
Application number
PCT/EP2015/001562
Other languages
German (de)
English (en)
Inventor
Rainer WALCHER
Julian BAUR
Matthias WALCHER
Jochen WALCHER
Original Assignee
Günther Wirth Hartmetallwerkzeuge GmbH & Co. KG
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 Günther Wirth Hartmetallwerkzeuge GmbH & Co. KG filed Critical Günther Wirth Hartmetallwerkzeuge GmbH & Co. KG
Publication of WO2016020047A1 publication Critical patent/WO2016020047A1/fr

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
    • B23C5/00—Milling-cutters
    • B23C5/003—Milling-cutters with vibration suppressing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0407—Cutting angles
    • B23C2210/0414—Cutting angles different
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/40—Flutes, i.e. chip conveying grooves
    • B23C2210/402—Flutes, i.e. chip conveying grooves of variable depth
    • B23C2210/407—Flutes, i.e. chip conveying grooves of variable depth having increasing depth in the direction of the shank from the tip of the tool

Definitions

  • the present invention relates to a milling tool having a head portion having a plurality of spirally-rotating blades, and a clamping portion for receiving on a processing machine.
  • Such milling tools come e.g. for a machining of particular metallic materials used and can be a
  • cemented carbide is understood as meaning a composite material in which hard particles, in particular by carbides,
  • Carbonitrides and / or oxocarbonitrides of the elements of groups IVb to Vlb of the Periodic Table of the Elements may be formed embedded in a ductile metallic matrix, which may be formed in particular of Co, Ni, Fe or an alloy of these. In most cases, the hard particles are at least predominantly formed by tungsten carbide and the metallic matrix consists of Co.
  • the spirally rotating cutting edges are usually formed identical to each other and evenly distributed over the circumference of the head portion. When machining workpieces by milling, the milling tool rotates about an axis of rotation and the cutting occur again and again in the material to be machined and again from this. At identical
  • the milling tool has a head portion having a plurality of spirally rotating blades defining a rotational direction of the milling tool about an axis of rotation and flutes disposed between each of the blades, and a chuck portion for receiving a processing machine. At least a first spirally revolving cutting edge and a second spirally revolving cutting edge following the first spirally revolving cutting edge separated by a second flute in the rotational direction are arranged such that at each axial position of the head portion the spiral angle of the second cutting edge is smaller than the spiral angle of is the first cutting edge and the core radius of the second flute from a free end of the head portion in the direction of
  • the spiral angle can change in particular over the axial extent of the cutting edge, as will be explained in more detail, so that the spiral angle is to be determined at the respective axial position of the cutting edge.
  • the core radius of the flute is understood as meaning in each case the distance of the lowest point of the flute (at the respective axial position of the flute) from the axis of rotation. Since the spiral angle of the first cutting edge at each axial position is greater than the spiral angle of this
  • the first cutting edge in its course from the free end of the head portion to the clamping portion in the circumferential direction rearwardly behind the second cutting edge, so that the tangential width of the second chip flute (thus the angular distance in the circumferential direction between the first cutting edge and the second Cutting edge) decreases with increasing distance from the free end of the head portion.
  • the second flute thus becomes narrower with respect to its tangential extent in the direction of the chucking section. Since the core radius of the second flute from a free end of the head portion in the direction of
  • Clamping portion decreases, but at the same time increases the depth of the second flute in the direction of the clamping section. In this way it is achieved that the cross-sectional area of the second flute can be kept substantially constant over the axial length of the head portion, so that a good chip removal over the second flute can be maintained.
  • Circumferential direction tapered flute is kept constant, thus improved chip removal is achieved by the flute. Due to the different pitch of the first spirally rotating cutting edge and the second spirally rotating cutting edge while a high smoothness of the
  • the spiral angle of the first cutting edge increases from a first value at the free end of the head section to a second value in the region adjoining the clamping section. In other words, this means that the spiral angle becomes larger as the distance from the free end increases.
  • an improved discharge of chips is achieved, in particular when milling deeper grooves, since the chips are more strongly deflected in the direction of the clamping section in the region of the head section located further in the direction of the clamping section.
  • the spiral angle of the first cutting edge may in particular preferably continuously increase, but it is also possible a different course.
  • a linear increase of the spiral angle allows a cost-effective production of the milling tool.
  • the spiral angle of the second cutting edge also increases from a first value at the free end of the head section to a second value in the region adjoining the clamping section, so that the spiral angle of the second cutting edge increases with increasing distance from the free end.
  • the spiral angle of the second cutting edge may preferably increase continuously, but a different course is possible.
  • a linear increase of the spiral angle allows a cost-effective production of the milling tool.
  • the spiral angle of the first cutting edge increases from a first value a1 at the free end of the head section to a second value a2 in the region adjacent to the clamping section
  • the spiral angle of the second cutting edge decreases from a first value ⁇ 1 at the free end of the section Head portion to a second value ⁇ 2 in the region adjacent to the chucking portion
  • the spiral angle of the second cutting edge increases from the free end of the head portion to the region adjacent to the chucking portion more than the helix angle of the first cutting edge, so that: ( ⁇ 2 - ⁇ 1 )> ( ⁇ 2 - a1).
  • the head section n has spirally running cutting edges, with: n e ⁇ 3; 4; 5; 6 ⁇ . It has been found that in particular this number of cutting leads to good machining results.
  • the head section has n spirally rotating cutting edges and the angular spacing in the circumferential direction between the first spirally rotating cutting edge and the second spirally rotating cutting edge at the free end of the head section is greater than 360 n. In this case, the angular distance between the first cutting edge and the second cutting edge at the free end thus against a uniform
  • Head portion is prevented from excessive reduction of the width of the second flute in the circumferential direction.
  • the angular spacing in the circumferential direction between the first spirally rotating cutting edge and the second spirally rotating cutting edge is adjacent to the clamping section
  • a third spirally encircling cutting edge which follows the second spirally encircling cutting edge separated by a third chip flute in the direction of rotation, is arranged such that the cutting edge
  • Spiral angle of the third cutting edge at each axial position of the head portion is greater than the spiral angle of the second cutting edge.
  • the third cutting edge in its course from the free end of the head portion to the chucking section runs more rearwardly in the circumferential direction than the second cutting edge, so that the tangential width of the third flute (thus the
  • the core radius of the third flute remains constant or increases from a free end of the head section in the direction of the chucking section. In this case, a high stability of the milling tool is preserved, as the wider or in the direction of the clamping section
  • widening third flute is not deeper with increasing distance from the free end, so that in the vicinity of the chucking a total of a relatively stable core of the milling tool is maintained.
  • the head section has n spirally rotating cutting edges and the angular distance in the circumferential direction between the second spirally rotating cutting edge and the third spirally rotating cutting edge at the free end of the head section is smaller than 360 n. Since the third cutting edge runs away to the rear faster, so in this way, the angular distance between the second cutting edge and the third cutting edge increases with increasing distance from the free end, even in the case of a large axial length of the head section, the angular distance between the second cutting edge and the third cutting edge in the direction of Clamping section becomes too large.
  • the misalignment of the cutting edges is distributed evenly over the axial length of the head section.
  • the head section has a third spiral-shaped cutting edge, which is formed the same as the first spiral-running cutting edge, and a fourth spiral-shaped cutting edge, which is formed the same as the second spiral-cutting cutting edge.
  • a third spiral-shaped cutting edge which is formed the same as the first spiral-running cutting edge
  • a fourth spiral-shaped cutting edge which is formed the same as the second spiral-cutting cutting edge.
  • the head section can particularly preferably have a total of four spirally circulating cutting edges.
  • the milling tool is a solid-material milling cutter, in which the head section and the clamping section are integrally formed.
  • the milling tool can be made of carbide as
  • Solid carbide milling cutters be formed. It is also particularly possible that at least the head portion is provided with a hard, wear-resistant coating.
  • the first cutting edge passes over a cutting corner into a first end cutting edge at the free end of the head section and the third cutting edge merges via a cutting corner into a third end cutting edge at the free end of the head section.
  • the first end cutting edge and the third end cutting edge extend parallel to a common plane containing the axis of rotation.
  • the first end cutting edge and the third end cutting edge do not extend to a center near the axis of rotation.
  • the second cutting edge passes over a cutting corner into a second end cutting edge at the free end of the head section and the fourth cutting edge merges via a cutting corner into a fourth end cutting edge at the free end of the head section.
  • the second end cutting edge and the fourth end cutting edge extend parallel to one another
  • the second end cutting edge and the fourth end cutting edge each extend to a center in the immediate vicinity of the axis of rotation, so that the second end cutting and the fourth cutting edge at least in
  • FIG. 1 shows a schematic side view of a milling tool according to an embodiment
  • FIG. 2 is a schematic sectional view along a line A - A in FIG.
  • FIG. 3 shows a schematic sectional view along a line B - B in FIG
  • Figure 1 in a region of the head portion in the vicinity of the chucking portion.
  • Fig. 5 is a graph showing the development of spiral angles from the free end to the chucking portion
  • FIG. 6 shows a graphic illustration (development) which images the cutting edge profile in a plane perpendicular to the axis of rotation in the direction of view;
  • Fig. 7 a schematic end view of the free end of
  • the milling tool 1 has a head portion 2 adapted for machining a workpiece, and a chuck portion 3 adapted for receiving a processing machine to be taken up.
  • the milling cutter 1 is formed as a solid milling cutter in which the head portion 2 and the clamping portion 3 are integrally formed of the same material.
  • the milling tool 1 can be formed in particular from hard metal.
  • the clamping portion 3 has a substantially cylindrical shape about a rotation axis Z.
  • the head portion 2 integrally formed with the chucking portion 3 has a plurality of spirally revolving
  • the head section 2 has a total of four spirally rotating cutting edges S1,
  • the head section 2 can in particular n such spirally encircling cutting S1,
  • Milling tool 1 rotates in operation during machining around the rotation axis Z.
  • the milling tool 1 is e.g. is formed as a right-handed milling tool, but it is also a reverse training as a left-handed milling tool possible in which the spiral shape of the cutting in the opposite direction.
  • the spirally rotating cutting edges S1, S2, S3, S4 are designed to chip material from the workpiece to be machined during operation of the milling tool 1.
  • the flutes N1, N2, N3, N4 spirally extending between the respective cutting edges S1, S2, S3, S4 are designed to derive the chips formed during the machining operation, wherein in the context of the present description the numbering of the flutes is in each case with regard to the assigned cutting edge, whose chips are derived, is selected.
  • the first flute N1 is thus arranged with respect to the rotation direction R in front of the first blade S1, the second flute N2 is arranged in front of the second blade S2, etc.
  • the individual spirally encircling cutting edges S1, S2, S3, S4 each proceed at a free end 2a of the head section 2 via cutting corners into associated end cutting edges SS1, SS2, SS3, SS4, which engage on the
  • End face of the milling tool 1 substantially perpendicular to the
  • Rotary axis Z extend. Although in the illustrated embodiment cutting corners are shown with a relatively small transition radius from the spirally rotating cutting edge to the respective associated end cutting edge, depending on the application, e.g. also possible to provide more rounded cutting corners. Although the end cutting SS1,
  • SS4 in the illustrated embodiment each extend substantially perpendicular to the axis of rotation, it is e.g. depending on
  • end cutting edges can optionally be curved.
  • Rotation axis Z contains. The first end cutting SS1 and the third
  • End cutting SS3 do not extend in each case to the
  • the second end cutting edge SS2 assigned to the second spirally revolving cutting edge S2 and the fourth cutting cutting edge SS4 assigned to the fourth spirally revolving cutting edge S4 likewise extend parallel to a common plane which contains the axis of rotation Z, as can be seen in FIG. As can be clearly seen in the end view of FIG. 7, the common plane of the first end cutting edge SS1 and the third extend
  • End cutting SS3 can be transferred and equally the second cutting S2 and the second end cutting SS2 in the fourth cutting edge S4 and the fourth end cutting SS4 can be converted.
  • the second end cutting edge SS2 and the fourth end cutting edge SS4 extend as far as a center region near the axis of rotation Z, where they are connected to each other by a short transverse cutting edge.
  • the second end cutting edge SS2 and the fourth end cutting edge SS4 extend as far as a center region near the axis of rotation Z, where they are connected to each other by a short transverse cutting edge.
  • the second end cutting edge SS2 and the fourth end cutting edge SS4 instead of such a connection via a chisel edge it is e.g. also possible, the second
  • End blade SS2 and the fourth end cutting SS4 in a common, the rotation axis Z containing plane, so that they converge directly in the center on the axis of rotation Z.
  • the third cutting S3 is formed identical to the first cutting S1 and the fourth cutting edge S4 identical to the second cutting S2.
  • the third flute N3 is identical to the first flute N1 formed and the fourth flute N4 identical to the second flute N2.
  • the cutting edges extend at each point of the cutting edge under one determined spiral angle to the axis of rotation R, wherein the helix angle is determined by the angle between the axis of rotation and a tangent to the cutting edge in the respective point in radial plan view to the point of the cutting edge.
  • the first cutting edge S1 extends below one
  • the third cutting edge S3 extends at a spiral angle ⁇ , which changes in accordance with the spiral angle ⁇ of the first cutting edge S1 from a first value ⁇ 1 at the free end 2a to a second value ⁇ 2 in the region 2b adjoining the clamping section 3.
  • the spiral angle ⁇ (or ⁇ ) increases continuously from the free end 2a in the direction of
  • Clamping section 3 in particular, the spiral angle increases linearly with increasing distance from the free end 2a, as shown in Fig. 5 is shown graphically. Due to the symmetry of the milling tool applies in the
  • the second blade S2 extends at a spiral angle ⁇ whose
  • the size also changes from the free end 2a in the direction of the clamping section from a first value ⁇ 1 to a second value ⁇ 2.
  • the spiral angle ß of the second cutting S2 increases from the free end 2a in the direction of the clamping section 3, in the concrete
  • Embodiment in particular linear.
  • Embodiment a linear increase of the spiral angle ⁇ , ß, ⁇ , 5 is realized in the direction of the clamping section 3, which has a positive effect in the production, other courses of such increase are possible.
  • the increase in the spiral angle in the direction of the clamping section 3 has the advantage that when milling, for example, deeper grooves, the chips better can be dissipated without preventing a relatively soft cut.
  • the spiral angles change over the axial extent of the head portion 2 respectively, which is advantageous in terms of the removal of chips, it is in a modification of e.g. but also possible to keep the respective spiral angle over the axial length of the head portion 2 constant.
  • the spiral angle ⁇ of the first cutting edge S1 is greater than the spiraling angle ⁇ of the second cutting edge S2, i. it is ⁇ > ß.
  • the first blade S1 moves rearward faster than the second with increasing distance from the free end 2a Cut S2.
  • the first blade S1 approaches in the circumferential direction of the second blade S2 and the width of the second flute N2 therebetween approaches
  • the circumferential direction becomes progressively smaller in the direction of the clamping section 3.
  • the pitch angle between the first blade S1 and the second blade S2 becomes smaller as the distance from the free end 2a increases.
  • the first cutting edge S1 increasingly approaches the second cutting edge S2 in the direction of the clamping section 3. Due to the symmetry in the embodiment, similarly, the third blade S3 approaches in the direction of the portion 2b of the fourth adjacent to the chucking portion 3
  • Chip flute N4) with increasing distance from the free end 2a would, without countermeasure, bring about a reduction in the cross-section available for chip removal, so that chip removal would be impaired.
  • the second flute N2 (and the fourth flute N4) is formed such that the core radius K2 of the second flute N2 decreases as the distance from the free end 2a increases
  • the core radius is determined in each case (at each axial position of the flute) by the radial distance of the lowest point of the flute from the axis of rotation Z.
  • the decrease in the core radius K2 of the second flute N2 can thereby be selected such that the cross-sectional area of the second flute N2 remains approximately constant in a plane perpendicular to the axis of rotation Z over the axial extent of the head section 2.
  • the core radius K3 of the third flute N3 in the embodiment remains over the axial extent of the Head section 2 at least substantially constant, so that a total of a stable core of the milling tool 1 is maintained.
  • the core radius K3 of the third flute N3 in the embodiment remains over the axial extent of the Head section 2 at least substantially constant, so that a total of a stable core of the milling tool 1 is maintained.
  • Flute N3 (and analogous to the core radius K1 of the first flute N1) also be designed such that it increases with increasing distance from the free end. In this case, however, the core radius should at most increase to an extent that is available for chip removal
  • Cross section of the flute is not reduced over a large part of the axial length of the head portion 2 with increasing distance from the free end 2a.
  • Angular distance in the circumferential direction TW2 between the first blade S1 and the second blade S2 at the free end selected such that it is greater than 3607 ⁇ , where n is the number of spirally rotating blades.
  • n the number of spirally rotating blades.

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

Abstract

L'invention concerne un outil de fraisage (1) qui comprend : une partie de tête (2), qui comporte une pluralité d'arêtes de coupe (S1, S2, ..., Sn) périphérique en spiral et déterminant un sens de rotation (R) de l'outil de fraisage sur un axe de rotation (Z), et des gorges d'enlèvement de copeaux (N1, N2, ..., Nn) disposées entre les arêtes de coupe, et une partie de serrage (3) pour le logement sur une machine d'usinage. Au moins une première arête de coupe (S1) périphérique en spiral et une deuxième arête de coupe (S2) périphérique en spirale qui fait suite à la première arête de coupe (S1) périphérique en spiral étant séparée une deuxième gorge d'enlèvement de copeaux (N2) par référence au sens de rotation (R), sont disposées de telle sorte qu'à chaque position axiale de la partie de tête (2) l'angle spiral (ß) de la deuxième arête de coupe (S2) est plus petit que l'angle spiral (α) de la première arête de coupe (S1) et le rayon de base (K2) de la deuxième gorge d'enlèvement de copeaux (N2) diminue depuis une extrémité libre (2a) de la partie de tête (2) en direction de la partie de serrage (3).
PCT/EP2015/001562 2014-08-06 2015-07-30 Outil de fraisage WO2016020047A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM295/2014 2014-08-06
ATGM295/2014U AT14275U1 (de) 2014-08-06 2014-08-06 Fräswerkzeug

Publications (1)

Publication Number Publication Date
WO2016020047A1 true WO2016020047A1 (fr) 2016-02-11

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WO (1) WO2016020047A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106270702A (zh) * 2016-10-25 2017-01-04 哈尔滨理工大学 一种带有曲线刃的整体式硬质合金成型铣刀
TWI629858B (zh) * 2017-09-04 2018-07-11 建準電機工業股份有限公司 吊扇之散熱構造
US20190366453A1 (en) * 2017-01-16 2019-12-05 Seco Tools Ab Rotary cutting tool
WO2021142385A1 (fr) * 2020-01-10 2021-07-15 Rosary Keith Dispositif d'exercice roulant et procédés d'exercice
CN113319352A (zh) * 2021-04-16 2021-08-31 厦门金鹭特种合金有限公司 一种薄壁件侧壁精加工立铣刀
CN114535676A (zh) * 2022-02-28 2022-05-27 广东鼎泰高科技术股份有限公司 一种可抑制毛刺的加工刀具
DE102016109130C5 (de) 2016-05-18 2023-02-02 Heike Trautvetter Schaftfräser

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DE102015116623A1 (de) * 2015-09-30 2017-03-30 Haimer Gmbh Schaftfräser
DE102015116624B4 (de) 2015-09-30 2023-06-15 Haimer Gmbh Schaftfräser
EP3199281B1 (fr) * 2016-01-27 2021-04-28 Sandvik Intellectual Property AB Fraise en bout
CN105665804B (zh) * 2016-02-02 2017-11-14 深圳市金洲精工科技股份有限公司 钻铣切削工具
WO2017198265A1 (fr) 2016-05-18 2017-11-23 Heike Trautvetter Fraise à queue
DE202017103021U1 (de) 2016-05-18 2017-08-22 Heike Trautvetter Schaftfräser
DE102016222594A1 (de) * 2016-11-16 2018-05-17 Kennametal Inc. Rotierendes Schneidwerkzeug, insbesondere ein Bohrfräser
DE202017103022U1 (de) 2017-05-18 2018-08-21 Heike Trautvetter Schaftfräser
EP3670048A1 (fr) 2018-12-21 2020-06-24 CERATIZIT Balzheim GmbH & Co. KG Outil de fraisage

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JPS6389212A (ja) * 1986-09-30 1988-04-20 Izumo Sangyo Kk エンドミル
JPH11309618A (ja) * 1998-04-30 1999-11-09 Matsushita Electric Ind Co Ltd エンドミル
US20030118411A1 (en) * 2001-09-10 2003-06-26 Flynn Clifford M. Variable helix cutting tools
US20060045637A1 (en) * 2004-09-01 2006-03-02 Berkshire Precision Tool, Llc Helical flute end mill with multi-section cutting edge
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016109130C5 (de) 2016-05-18 2023-02-02 Heike Trautvetter Schaftfräser
CN106270702A (zh) * 2016-10-25 2017-01-04 哈尔滨理工大学 一种带有曲线刃的整体式硬质合金成型铣刀
US20190366453A1 (en) * 2017-01-16 2019-12-05 Seco Tools Ab Rotary cutting tool
US11014173B2 (en) * 2017-01-16 2021-05-25 Seco Tools Ab Rotary cutting tool
TWI629858B (zh) * 2017-09-04 2018-07-11 建準電機工業股份有限公司 吊扇之散熱構造
WO2021142385A1 (fr) * 2020-01-10 2021-07-15 Rosary Keith Dispositif d'exercice roulant et procédés d'exercice
CN113319352A (zh) * 2021-04-16 2021-08-31 厦门金鹭特种合金有限公司 一种薄壁件侧壁精加工立铣刀
CN114535676A (zh) * 2022-02-28 2022-05-27 广东鼎泰高科技术股份有限公司 一种可抑制毛刺的加工刀具
CN114535676B (zh) * 2022-02-28 2023-08-29 广东鼎泰高科技术股份有限公司 一种可抑制毛刺的加工刀具

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