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
• • 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
  • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
  • B23B27/02—Cutting tools with straight main part and cutting edge at an angle
• • 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
  • B23B27/04—Cutting-off tools
• • 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
  • B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
• • 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
• • 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
  • B23B2200/3645—Lands, i.e. the outer peripheral section of the rake face
  • B23B2200/3654—Lands, i.e. the outer peripheral section of the rake face being variable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
  • B23B2222/14—Cast iron
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/12—Boron nitride
  • B23B2226/125—Boron nitride cubic [CBN]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/18—Ceramic
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B2226/00—Materials of tools or workpieces not comprising a metal
  • B23B2226/31—Diamond
  • B23B2226/315—Diamond polycrystalline [PCD]
• • 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
  • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges
  • Y10T407/235—Cutters, for shaping including tool having plural alternatively usable cutting edges with integral chip breaker, guide or deflector

Definitions

• the invention relates to a cutting plate, in particular indexable insert, for
• Cutting corner and facing the cutting edge second rake surface edge of the rake face a likewise serving as a support surface second surface is arranged.
• this object is achieved in that the first rake face edge and / or the second rake face edge is interrupted until several times by substantially perpendicular to the cutting edge and / or cutting edge and into the rake surface extending webs, wherein the webs with the second surface in a Lie flat. This serves to reinforce and stabilize the cutting edge.
• the webs are formed in a plan view of the rake surface of peninsular.
• the cutting edges are optimally reinforced and stabilized.
• Peninsular therefore to have the widest possible and therefore stable support in the cutting edge area.
• the webs taper backwards to create more space for the chip flow.
• the insert is thus in the clamping situation not only in the middle, but also with its entire edge region on a base.
• the second surface extends at an angle greater or smaller than 0 ° to the first surface.
• the support surface of the second surface would be only one line contact the cutting edge and no surface contact more.
• the first rake surface edge runs in a nearly parallel distance to the cutting edges, whereby the second surface is the same everywhere.
• the webs form in one embodiment of the invention, the beginning of one or more steadily sloping reinforcing ribs in the clamping surface, with respect to on the surface concave almost perpendicular to the cutting edges and open into the deepest area of the rake face. Due to its special surface geometry, the insert has a recess as rake surface with special properties for draining the resulting chips. A special feature of this rake face or Spanleitgeometrie or called Spanleitcut, are located in it reinforcing ribs, starting from webs which extend approximately perpendicular to the cutting edge and the rake face give a wavy character. This also serves to reinforce and stabilize the cutting edge while using a positive rake angle.
• chip removal surfaces are arranged which extend downwardly to the deepest region of the rake face.
• a positive rake angle is created.
• the chip discharge surfaces are arranged adjacent to the reinforcing ribs.
• the deepest region of the rake face merges into ascending regions into the first surface.
• the maximum distance of the cutting edge to the point of the web projecting furthest into the rake face is up to twice as long as the distance from the cutting edge to the first rake face edge. As a result, the cutting edge is sufficiently reinforced.
• the webs are arranged one or more times, the same or unevenly distributed along the first and / or second rake face edge.
• the distance of the webs on the rake edge can be adapted to the requirements.
• the rake angles a of the surfaces of the reinforcing ribs are equal to or greater than the rake angles b of the chip evacuation surfaces
• the rake face is wave-shaped in the direction of the cutting edges.
• the respective rake angles b of the surfaces of the reinforcing ribs are the same or different in the case of multiply occurring reinforcing ribs. Different rake angles would result in a resulting longer chip being unevenly curved and thus more easily broken.
• the respective rake angles a of the chip discharge surfaces are the same or different from one another. Different rake angles enable a chip compression.
• the rake angle a is greater than or equal to the rake angle b. This is about making the originally uniform waveform uneven in other possible variants, so that the chip gets an uneven curvature and warp.
• the rake face in plan view has a contour like a butterfly, wherein the body is formed by the boundary rib and the wings by the reinforcing ribs, the Spanablauf vom and the rising areas.
• the cutting insert according to the invention consists of a ceramic or mixed ceramic, because the described geometry is adapted to these materials.
• the cutting insert according to the invention is preferably an indexable insert which serves for the removal of certain material layers on defined workpieces during machining in turning, milling and drilling operations.
• the subject matter of this invention is to provide a cutting insert made of ceramic or mixed ceramic with special chip-guiding geometry, which is special for the stated requirements.
• the use of this Spanleitgeometrie invention in other hard materials is of course also conceivable.
• the back of the boundary rib as a variant for particularly high stress, even up to the designated 5 and 27 in the figures first and second surface or support surface and form a continuous plane-parallel and identical surface with these two surfaces.
• FIGS. 1 to 4 show examples of cutting inserts according to the invention with the special chip guide geometry designated as rake face, shown in different cutting insert shapes, as used in the cutting industry
• Figure 1 shows an indexable insert 1 with a square basic shape, which will be described later in detail.
• FIGS. 2 and 3 show indexable inserts 1 with a basic shape in the form of a parallelogram and FIG
• FIG. 4 shows an indexable insert 1 with a basic shape in the form of a triangle.
• Fig. 5 shows the spatial view of a square indexable insert 1
• Fig. 6 shows the plan view of just such.
• a cutting insert or indexable insert 1 also referred to as a cutting body or cutting insert, always has at least one cutting edge 2 as a main cutting edge, a corner radius 3 and a cutting edge 4 as a secondary cutting edge. cutting edge, and a first surface 5 as a clamping surface in a suitable carrier tool.
• a suitable carrier tool for example, a drill, a drill, a drill, a drill, or a drill, or a drill, and a first surface 5 as a clamping surface in a suitable carrier tool.
• up to four cutting corners 6 may be present.
• the insert 1 can be rotated several times in use after a certain cutting time and recognizable wear features on a carrier tool in a suitable insert seat to bring back unused cutting corners 6 used. With some types of cutter you can also turn the bottom up and therefore has twice the amount of cutting corners 6 available.
• indexable insert 1 for cutting bodies of this type.
• Embodiments of indexable inserts 1 may, as shown and described herein, be designed with a smooth surface or with depressions or holes in the center of the cutting body. These features and areas are used to secure the indexable insert 1 in the appropriate insert seat on a carrier tool.
• the expert usually uses the specially provided Spannpratzen, clamping wedges o- screws.
• indexable insert 1 is in the area of the cutting corner 6 attached designated as rake surface recess, also referred to as chip breaker, because it derives the chips.
• the indexable insert 1 described here has a first surface 5 serving as a bearing surface for a clamping tool and a depression designated as a rake face in the first surface 5 in the cutting edge region and along the cutting edges 2, 4.
• a second surface 27 also serving as a bearing surface is arranged.
• These first rake face edges 10 form the edge of the rake surface towards the cutting edges 2, 4 and can also be used as Spanleitprocessnbeginn be designated.
• These rake face edges 10 are arranged behind the cutting edge 2 at a defined and nearly parallel spacing 12 (see FIG. 10, in which a section along the line AA of FIG. 8 is shown).
• chip discharge surfaces 11, 15, 19, 23 are arranged in the rake face, which continue as a specially shaped positively sloping areas to the deepest portion 24 of the rake face. There, they change direction in order to terminate again in the first surface 5 of the indexable insert 1 via a further, specially shaped and deflecting ascending region 7 and 9.
• the designated 5 and 27 first and second surface are in this case plane-parallel, or identical and in this case form the surface 5 of the indexable insert 1, the mirror image seen turn on the turn planparallel bottom of the indexable insert 1 in turn forms the bearing surface.
• These bearing surfaces 5 and 27 must be large enough and flat, so that the indexable insert 1 in the corresponding support tools a maximum support in the plate seat bottom and also has the best possible cutting edge support to withstand the cutting forces arising during cutting.
• the circumferential second surface 27 in the cutting edge area and along the cutting edges 2 and 4 can also extend at an angle greater or smaller than 0 ° to the surface 5 on the circumference of the indexable insert 1.
• this circumferential second surface 27, also called the cutting edge surface are the peninsular webs 12, 16 and 20 emanating from it, each interrupting the first rake face edge 10 (Spanleitstufbeginn) and the cutting edge surface 27 along the cutting edge 2 widen partially and in the special dimensions for cutting edge stabilization and enlarged plan support serve.
• These webs 12, 16 and 20 are in their length 11 (see Figure 10) longer to twice as long as the width 12 (see Figure 11, which shows a section along the line BB of Figure 8) of the cutting edge surface 27 along the actual Cutting edge 2 and are arranged along the cutting edges 2, 4 almost parallel one or more times.
• the webs 12, 16, 20 (also called web surfaces) at the same time also form the beginning of further concave reinforcing ribs 13, 17, 21, which extend between the chip discharge surfaces 11, 15, 19, 23 described in the direction of the cutting center.
• the webs 12, 16, 20 and the adjoining reinforcing ribs 13, 17, 21 separate at equal or unequal intervals the chip discharge surfaces 11, 15, 19, 23.
• the width of the webs 12, 16, 20 is usually at least as wide as the cutting edge surface 27 itself and can vary depending on the cutting edge length and number of bars different in shape and number.
• the main cutting width 12 (see FIG. 11) is 0.05 mm to 2 mm for most applications and generally still has specific cutting edge preparations such as fillets, chamfers and double chamfers.
• the selection of the cutting edge preparations plays a major role in machining. They are neglected here in the further description, since they are not part of the invention.
• the spacing, size and number of webs and reinforcing ribs are also adapted depending on the type of insert, the material, the necessary depth of cut and the experience of use.
• the waveform which has its origin at the webs 12, 16, 20, stabilizes the cutting edge 2 and the second surface 27, or the cutting edge surface, is thereby enlarged and reinforced.
• a further special feature is the limit rib 26 illustrated in FIG. 9 in the sectional view CC of FIG. 8, which runs concavely and arcuately to the center of the cutting plate and is made higher than the deepest region 24 of the rake face.
• This boundary rib 26 urges the chips occurring during the cutting process to the rear away from the cutting edge 2 and the corner radius 3 and protects by their turn rib-shaped elevation the minor cutting edge 4 from damage caused by the impact of the chips to be dissipated on the Cutting edge 2 of the main cutting edge arise.
• This is particularly advantageous when indexable inserts 1 with the particular chip breaker features described here are used in a milling operation. In this case, usually the plane surface of the workpiece is produced by the cutting edge 4 of the secondary cutting edge.
• the back of the boundary rib 26 may extend as a variant for particularly strong stress up to the designated 5 and 27 first and second surface or bearing surfaces and form a continuous plane-parallel and identical surface with these two surfaces.

Landscapes

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=39590465

Family Applications (1)

Country Status (11)

Families Citing this family (9)

Family Cites Families (8)

• 2008
  • 2008-05-19 KR KR1020097026650A patent/KR20100018576A/ko not_active Application Discontinuation
  • 2008-05-19 MX MX2009012533A patent/MX2009012533A/es not_active Application Discontinuation
  • 2008-05-19 EP EP08750337A patent/EP2155423A1/de not_active Withdrawn
  • 2008-05-19 CA CA002687820A patent/CA2687820A1/en not_active Abandoned
  • 2008-05-19 JP JP2010508813A patent/JP2010527801A/ja active Pending
  • 2008-05-19 WO PCT/EP2008/056094 patent/WO2008142038A1/de active Application Filing
  • 2008-05-19 BR BRPI0812153-2A2A patent/BRPI0812153A2/pt not_active IP Right Cessation
  • 2008-05-19 DE DE102008001846A patent/DE102008001846A1/de not_active Withdrawn
  • 2008-05-19 CN CN200880025592A patent/CN101778685A/zh active Pending
  • 2008-05-19 US US12/600,848 patent/US20100278599A1/en not_active Abandoned
• 2009
  • 2009-11-19 IL IL202226A patent/IL202226A0/en unknown

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events