EP3898045A1 - Outil de coupe - Google Patents

Outil de coupe

Info

Publication number
EP3898045A1
EP3898045A1 EP19804623.7A EP19804623A EP3898045A1 EP 3898045 A1 EP3898045 A1 EP 3898045A1 EP 19804623 A EP19804623 A EP 19804623A EP 3898045 A1 EP3898045 A1 EP 3898045A1
Authority
EP
European Patent Office
Prior art keywords
chip
cutting
elements
cutting edge
insert according
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
EP19804623.7A
Other languages
German (de)
English (en)
Inventor
Quanliang ZHAO
Jose AGUSTIN-PAYA
Robert MILITELLO
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.)
ZCC Cutting Tools Europe GmbH
Original Assignee
ZCC Cutting Tools Europe GmbH
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 ZCC Cutting Tools Europe GmbH filed Critical ZCC Cutting Tools Europe GmbH
Publication of EP3898045A1 publication Critical patent/EP3898045A1/fr
Pending legal-status Critical Current

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
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B23B27/143—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having chip-breakers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/08—Rake or top surfaces
    • B23B2200/081—Rake or top surfaces with projections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/08—Rake or top surfaces
    • B23B2200/086—Rake or top surfaces with one or more grooves
    • B23B2200/087—Rake or top surfaces with one or more grooves for chip breaking

Definitions

  • the invention relates to a cutting tool for machining operations, in particular for peeling-like machining operations, with a chip-forming trough running along the cutting edge, in which raised recesses are formed
  • Spanformieri are arranged.
  • Machining includes the machining of metals such as Steel, cast iron, but also non-ferrous metals and plastics understood.
  • the present invention is basically suitable for cutting tools for turning, milling or grooving and in particular for peeling processing.
  • chip guiding or chip shaping elements have the task of shaping and guiding the chip detached from the workpiece, with particular care being taken to ensure that the workpiece is not damaged by the chip formed, as is e.g. can happen with so-called tangled chips.
  • the chip should also be guided and broken in such a way that the friction caused by the chip flow is limited to such an extent that excessive heating of the cutting insert and in particular of the cutting edge is avoided, since this would lead to faster tool wear.
  • workpieces such as aluminum or plastic, there is also a risk of the chip sticking to the chip surface if the heat is high.
  • Cutting tool has main and secondary cutting edges arranged side by side, which together form an obtuse angle. Along these cutting edges is a chip breaker with a rising flank facing the cutting edge
  • Indentations should have laterally limited projections.
  • peeling tools have a secondary cutting edge that is significantly longer than the main cutting edge.
  • Target surface roughness of the workpiece from 4 pm to 8 pm.
  • the insert is nine-cornered and has three unequal main and minor cutting edges on the bottom and top, resulting in the shape of an equilateral triangle with symmetrically angled tips.
  • the ratio of the length of the main cutting edges to the length of the secondary cutting edges should be between 1: 1, 5 to 1: 3.
  • a chip-forming groove is provided along each main cutting edge and runs approximately parallel to the main cutting edge. In areas close to the cutting edge, the chip groove merges into a rising flank, which ends with an upper flank.
  • EP 0611 334 B4 describes a polygonal "cutting insert with a rake face" !, which has a central crusher that protrudes from the plane defined by the set avoiding edges and runs out towards a cutting corner area in the form of at least one longitudinal rib, preferably two longitudinal ribs. which are arranged symmetrically to a cutting corner angle bisecting and whose longitudinal axes have a common intersection in the area of the chip breaker.
  • chip breakers on chip faces are known from the prior art which run essentially parallel to the minor cutting edge.
  • Chip breaker steps lift the chip that is running away from the workpiece, but there is insufficient chip guidance so that the chip that runs off is uncontrollable.
  • DE 19725 341 therefore proposes chip breakers with two laterally limited projections.
  • EP 0278083 A1 proposes a cutting insert in which an area with a rake angle of more than 30 ”adjoins the chamfer on the rake surface at right angles to the cutting edge the rake angle becomes smaller with increasing distance from the chamfer will, in the chip face regions of the cutting body lying between the cutting surfaces, chip ribs extending in the chip discharge direction and with side spacing next to one another should be arranged protruding from the chip face, between which there are further elevations with run-up ramps.
  • the corner area there are three degree elevations arranged side by side, the two outer ones with their longitudinal axes running parallel to the chip ribs adjacent to them.
  • EP 0 143 758 A1 relates to a cutting insert with elongated ribs which are trapezoidal in cross section and run parallel to the cutting edge. These ribs are interrupted by hollows.
  • EP 0674 559 B1 proposes a cutting insert with at least one chip-guiding groove with raised chip-shaping elements in the form of longitudinal ribs which are at least partially bridged over the chip-guiding groove and which are provided with chip-guiding elements which are transverse to the axis of the longitudinal rib.
  • the raised chip-forming elements provided in the chip-forming trough have - viewed in a plan view - an elongated contour with a greater length than their width.
  • Chipform elements have a rising flank and a falling flank, the comparatively longer rising flank being characterized by a rising angle from 3 "to 20 °, preferably 5 * to 10" and the falling flank by an angle between 25 ° to 45 “, preferably 27" to 35 “is defined, the transition from the Rising edge to the falling edge is rounded and the radius of this
  • Rounding is between 0.05 mm and 1 mm, preferably between 0.25 mm and 0.4 mm.
  • Chip-forming element ensures a safe chip guidance, on the other hand high friction of the chip running off is avoided because the chip only partially contacts the chip faces in the falling flanks. This effect is particularly pronounced when the raised chip elements viewed in the top view in the area of their boundary line, which is shown by the
  • adjacent rising and falling flanks is defined, has a greater width than in the adjacent areas.
  • the chip-forming elements are preferably arranged at a distance from one another, in particular at a distance of 0.4 mm to 0.6 mm with a respective length of 4 mm to 10 mm defined by their longitudinal axis. Furthermore, the chip-forming elements are preferably lined up on a line which runs parallel to the cutting edge, the orientation of the chip-forming elements being inclined by 10 "to 20", preferably 15 ", in relation to the chip removal direction.
  • Chip shaping elements are oriented towards the active cutting edge so that the cut incoming chip is guided in the direction of the longitudinal axis of the chip shaping elements.
  • the chip elements can have a concave, convex or even partially rectilinear shape perpendicular to their longitudinal axis, the concave design being preferred.
  • chip form elements arranged separately next to one another within a chip form groove, it is possible to line up the chip form elements like fish scales, the chip form elements each being in their
  • chip-forming elements which additionally overlap laterally, the degree of overlap measured vertically to the longitudinal axis being a maximum of 20%, preferably a maximum of 10%.
  • a chamfer can be provided to stabilize the cutting edge.
  • FIG. 1 is a perspective view of a peeling tool
  • FIG. 2 is a plan view of the peeling tool of FIG. 1,
  • Fig. 3 is a detailed view of a chip groove with raised
  • FIG. 4 shows a single view of a chip-forming element in a chip-forming groove
  • FIG. 5 shows a section along line A-A in FIG. 4,
  • Fig. 6 is a chip forming groove with raised arranged offset to each other
  • Fig. 7 shows another embodiment of a chip groove with a
  • Chip-forming element that penetrates the cutting edge
  • Fig. 8 shows a corner area of a cutting tool for turning with two
  • Fig. 9 is a detailed view of a chip groove with raised
  • Chip form elements in a fish scale-like arrangement
  • Fig. 10 is a detailed view of a rhombic cutting insert
  • Fig. 11 is a detailed view of a cutting corner of a rhombic
  • the present invention can be applied to all basic cutting insert shapes known from the prior art, for example triangular, square, rhombic or even approximately rectangular
  • Cutting inserts such as those used in particular for peeling, in which a relatively long secondary cutting edge, which enclose an obtuse angle of less than 180 °, adjoins a short main cutting edge.
  • the invention can also be used in lancing inserts, which are not shown in the present case.
  • indexable inserts can have a positive or negative contour. If the contour is positive, the top and bottom sides are designed as rake faces with correspondingly adjacent cutting edges
  • FIGS. 1 and 2 show a cutting tool (as an exchangeable cutting insert) for peeling processing.
  • Such cutting inserts are characterized by a relatively short main cutting edge 10 in conjunction with a long secondary cutting edge 11, the main cutting edge and the secondary cutting edge including «not obtuse angles.
  • the middle rake face plateau 12 is designed as a support and rake face in so-called indexable inserts.
  • a chip-forming guide 14 or chip-forming groove can directly adjoin the cutting edge or a chamfer 13.
  • individual raised chip-forming elements 15 here five row-shaped raised chip-forming elements 15 are provided, each of which has a relatively flat rising flank with a rising angle of preferably 5 ° to 10 ° compared to an imaginary horizontal plane.
  • A, 5 is, in any case, exaggerated for clarity, is smaller than the angle ⁇ of the falling flank, which can be, for example, 30 °.
  • the chip-forming element 15 is preferably convex
  • the rise angle o and the angle ⁇ of the falling flank is formed by the connecting line between the base point of the rising or falling plane in the region of the groove 14 and the upper vertex at the apex line 153 and the connecting line running parallel to the cutting edge in the groove 14 never between the two base points of the rising and the falling edge.
  • the chip form element has a radius R between 0.25 mm and 0.4 mm.
  • the chip forming groove 14 is formed by a falling part, as a result of which a rake angle of
  • the angle of rise to this rake face plateau can be the same size or larger than the angle of the falling flank.
  • This chip form groove which is known in principle according to the prior art, serves to bend the chip and to break it as short as possible.
  • FIG. 3 shows part of a chip shaping guide 14 with three raised chip shaping elements 15 arranged next to one another.
  • the distance between the chip form elements is, for example, 0.5 mm; the respective length l of each
  • Chip form elements is approx. 5 mm.
  • the chip-forming elements can, as shown in FIGS. 2 and 3, each have the same contour and be lined up along a common line, or alternatively, as indicated in FIG. 6, offset from one another, i.e. with a different distance from the cutting edge.
  • the raised chip-forming elements 15 can also be arranged rotated by 180 °, so that, as shown in FIG. 6, two falling flanks face each other.
  • the extremely concave chip-forming element 16 is arranged in such a way that it breaks through the chamfer 13 or the cutting edge 10, which results in a local elevation of the cutting edge.
  • the tip cutting corner 17 of a rhombic cutting insert is shown, in which the rake formation is axisymmetric to the
  • Cutting edge bisector 18 is configured. there are two raised ones in the chip mold recess adjoining the cutting edge or the chamfer
  • Chip-shaped elements 15 are arranged, in which the respective «! face shorter and steeper falling flanks.
  • FIG. 9 A different design of the rake face of the cutting tool with overlapping raised chip shape elements can be seen in FIG. 9.
  • Cutting edge 10 results in an approximately undulating course, which causes the outgoing chip on the one hand good steering, on the other hand one
  • the overlap areas marked with the reference symbols Üi and Üz are 10% to 30% (Üi) or a maximum of 20%
  • a rhombic cutting insert with a cutting corner 17 is also selected, in which the cutting edges 20, 21 converge.
  • the cutting edges 20, 21 converge.
  • Chip mold elements 22 arranged one behind the other.
  • FIG. 11 shows the connection with already known chip-forming elements.
  • chip-forming trough 14 individual raised chip-forming elements 23, each of the same design, are arranged, which are approximately the chip-forming elements can correspond, which is shown in Figs. 1 to 5.
  • Figs. 1 to 5 the chip-forming elements
  • the longitudinal axis of these chip-forming elements 23 is oriented approximately perpendicular to the cutting edge; a maximum of 10 * to 15 * angle to the cutting edge perpendicular should be selected.
  • the chip breaker 24 shown in FIG. 11 drops, for example, at an angle of approximately 20 * into the chip-forming trough 14, the chip breaker 24
  • Cutting edge 10 clearly protrudes. From this chip breaker survey, respective longitudinal ribs 25 protrude, the orientation and contour of which in principle

Landscapes

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

Abstract

L'invention concerne un outil de coupe pour des usinages par enlèvement de copeaux, en particulier servant à l'usinage par enlèvement de copeaux de type pelage, comprenant une cavité de formation de copeaux s'étendant le long de l'arête de coupe, dans laquelle sont disposés des éléments de formation de copeaux réalisés en relief. L'invention prévoit que les éléments de formation de copeaux en relief possèdent un contour allongé - dans une vue d'en haut - présentant une longueur plus longue que sa largeur, que les éléments de formation de copeaux comportent un flanc croissant et un flanc décroissant. Le flanc croissant en comparaison plus long est défini par un angle croissant (o) allant de 3° à 20°, de préférence de 5° à 10°, et par un angle décroissant (ß) compris entre 25° et 45°, de préférence 27° et 35°, et que la transition depuis le flanc croissant vers le flanc décroissant est arrondie et le rayon (R) dudit arrondi est compris entre 0,05 mm et 1 mm, de préférence entre 0,25 mm et 0,4 mm.
EP19804623.7A 2018-12-20 2019-10-30 Outil de coupe Pending EP3898045A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018133164.9A DE102018133164A1 (de) 2018-12-20 2018-12-20 Schneidwerkzeug
PCT/DE2019/100935 WO2020125845A1 (fr) 2018-12-20 2019-10-30 Outil de coupe

Publications (1)

Publication Number Publication Date
EP3898045A1 true EP3898045A1 (fr) 2021-10-27

Family

ID=68581118

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19804623.7A Pending EP3898045A1 (fr) 2018-12-20 2019-10-30 Outil de coupe

Country Status (5)

Country Link
US (1) US12330220B2 (fr)
EP (1) EP3898045A1 (fr)
CN (1) CN113056341B (fr)
DE (1) DE102018133164A1 (fr)
WO (1) WO2020125845A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4331748A1 (fr) * 2022-09-01 2024-03-06 Dormer Pramet s.r.o Insert pour décollement de barre
CN116100052B (zh) * 2023-01-06 2025-06-17 南京航空航天大学 一种仿生燕尾形微织构刀具及其制备方法
CN117798414A (zh) * 2024-01-17 2024-04-02 湖南科技大学 一种仿生鲨鱼皮微织构刀具及其制备方法

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DE3105377A1 (de) * 1981-02-14 1982-10-28 Karl Gustav Dipl.-Ing. 8500 Nürnberg Hertel jun. Schneideinsatz fuer schneidwerkzeuge
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AT17717U1 (de) * 2021-05-05 2022-12-15 Ceratizit Austria Gmbh Schneidelement

Also Published As

Publication number Publication date
DE102018133164A1 (de) 2020-06-25
CN113056341A (zh) 2021-06-29
US12330220B2 (en) 2025-06-17
CN113056341B (zh) 2024-12-03
WO2020125845A1 (fr) 2020-06-25
US20220072623A1 (en) 2022-03-10

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