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
  • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
  • B23C3/06—Milling crankshafts
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23B—TURNING; BORING
  • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
  • B23B5/18—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for turning crankshafts, eccentrics, or cams, e.g. crankpin lathes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C3/00—Milling particular work; Special milling operations; Machines therefor
• • 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
  • B23B—TURNING; BORING
  • B23B2200/00—Details of cutting inserts
  • B23B2200/20—Top or side views of the cutting edge
  • B23B2200/202—Top or side views of the cutting edge with curved cutting edge
• • 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
  • B23B2200/3681—Split inserts, i.e. comprising two or more sections roughly equal in size and having similar or dissimilar cutting geometries
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2215/00—Details of workpieces
  • B23C2215/20—Crankshafts
• • 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
  • Y10T407/19—Rotary cutting tool
  • Y10T407/1952—Having peripherally spaced teeth
  • Y10T407/196—Varying in cutting edge profile
• • 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

Definitions

• Almost innumerable cutting insert variants for cutting operations are known in the state of the art, wherein the cutting insert geometry is in each case tuned essentially to the cutting operations of drilling, turning or milling and to the workpiece to be machined and its shape design.
• the known according to the prior art cutting inserts are designed as so-called indexable inserts, d. H. that they have several consecutively usable cutting edges. Depending on the basic shape of the indexable inserts, there are four or up to eight usable cutting edges. In a cutting insert with a positive clearance angle having a substantially square rake surface, there are four usable cutting edges.
• the cutting insert according to DE 197 04 931 C1 which has two larger longitudinal surfaces each having a projecting web centrally along its longitudinal axis.
• the longitudinal edges delimiting cutting edges form with their respective end and the short rounded edges of the upper and lower surfaces an angle between 70 ° and 90 °.
• Several such cutting inserts are clamped on a cutter tool and used for crankshaft machining. In the so-called external milling of crankshafts, rotating disc cutters are delivered radially onto a rotating crankshaft.
• Various cuts are used to make the peg diameter, the flanks, the oil collar and the undercut by means of the radially or tangentially clamped cutting inserts.
• crankshaft machining indexable inserts for roughing for the production of a undercut
• pin diameter and the or the oil bundles are distinguished.
• Figures 3 and 4 of EP 0 830 228 B1 show typical shapes of cutting inserts required for journal diameter machining as well as undercut machining. Different cutting inserts are also used in face milling cutters for roughing or finish milling.
• This object is achieved by the cutting insert according to claim 1.
• This cutting insert has a base body, which has a support surface and a roof surface spaced therefrom, and side surfaces connecting these surfaces, wherein two or more adjacent surfaces form cutting edges.
• Said support surface is permanently connected to a support surface of a cutting insert, which has a different geometry from the cutting insert, which is suitable for another Zerspanungsoperation.
• the cutting insert according to the invention is composed in principle of two different cutting tools, which are connected to one another at their bearing surfaces. As a result, the advantage is achieved that with said combination cutting insert different cutting operations can be performed.
• the cutting insert according to the invention can also be manufactured considerably cheaper and minimizes the cost of warehousing.
• the permanent connection of the two bearing surfaces is created by sintering into a one-piece body.
• Cutting insert with cutting plate are solidified by powder metallurgy to a green compact, after which this green compact is sintered with the two superimposed bearing surfaces.
• the cutting insert has a bore for receiving a clamping screw. This bore extends from one roof surface to the opposite roof surface.
• the cutting plate has a plan view of the formed as a chip surface roof surface, which is preferably square.
• the cutting insert itself has two side surfaces with arcuate cutting edges designed as opposed chip surfaces for forming a undercut during crankshaft milling. Depending on the installation position, a undercut or the pin diameter is formed with the cutting insert.
• the cutting insert may be characterized by two side surfaces formed as opposite rake faces bounded by a cutting edge which is rectilinear and arcuate in the 90 ° corners so that this cutting insert is particularly suitable for cutting an oil band contour on a crankshaft is.
• the cutting plate has two side surfaces designed as opposed clamping surfaces with arcuate cutting edges for forming a undercut.
• a combination of a cutting insert that is suitable for forming an oil collar may be connected to a corresponding cutting insert for journal diameter machining.
• a cutting insert for machining a journal diameter is combined with such a cutting insert for forming a undercut, wherein the arcuate cutting edge sections are formed substantially perpendicular to the support surface.
• the mutual bearing surfaces which are in particular substantially square, be rotated against each other, so that the cutting edges, which are formed on respective side surfaces, respectively, are rotated against each other.
• the fastening screw should not be longer than the respective cutting edges or the longest cutting edge, thus preventing the screw from undergoing excessive elongation.
• the cutting insert according to the invention may optionally be arranged in cassettes of a tool carrier, which in turn are fastened to the tool carrier.
• such "combined cutting inserts" are made of an identical material, for example a cemented carbide or a cermet material, which can also be coated in one or more layers to improve the wear properties or the cutting properties , which are joined together to form a single unit, consist of different types of material, but it must be ensured that the connection between the two surfaces is stable.
• Fig. 5 is a plan view of another embodiment of a cutting insert
• Fig. 6 shows another embodiment of a cutting insert according to the invention.
• the cutting inserts shown in Figures 1 to 4 are particularly suitable for the production of crankshafts.
• Each of the cutting inserts shown in Figures 1 to 4 represents a combination tool composed of two cutting inserts joined together at their respective (imaginary) bearing surfaces to form a one-piece body.
• the cutting insert shown in Fig. 1 is in principle composed of an indexable insert 10, which is suitable for the undercut and an indexable insert 11 for the production of a peg diameter together.
• Reference numeral 12 denotes in Fig. 2 and 3 so-called indexable inserts for the production of an oil collar.
• Reference numeral 13 relates to a another version of an indexable insert for undercut on a crankshaft.
• the indexable insert 10 has two opposite side surfaces 101 and 102, which are bounded by arcuate cutting edges 103 and 104 and a straight cutting edge piece 105.
• the roof surface extending from the imaginary and concealed bearing surface has a respective curvature 106 at the edge and a roof surface at the top.
• the indexable insert 11 has a roof surface 111 which is bounded by four cutting edges 112, which also form the boundary lines for the four side surfaces 113. In the present case, these side surfaces 113 are inclined at a positive clearance angle, wherein in the lower region of the insert 11, the local side surface can leak directed vertically to the roof surface.
• the imaginary bearing surfaces, which are connected to each other, have the same size in the present case.
• the cutting edges 103 and 104 slightly overhang the cutting edges 112, respectively.
• an indexable insert 10 of the type already described is combined with an indexable insert 12, which in addition to the imaginary support surface side surfaces 121 which are formed as clamping surfaces and which are bounded by a cutting edge 122, the substantially perpendicular to each other straight cutting edge sections and have arcuate cutting edge portions in the corners.
• the above-described indexable insert 12 is connected to an indexable insert 11 of the type shown in Fig. 1 and described, in which case the side surfaces are formed uniformly flat.
• the cutting insert according to the invention has two indexable inserts 11 and 13, wherein the indexable insert 13 is also formed for undercut production.
• the respective side surfaces 131 are bounded by a cutting edge 132, which has two hump-shaped projections 133 which can cut a corresponding undercut contour.
• two cutting inserts 14 and 15 have been combined with each other, which have a rectangular or square roof contour, but the respective bearing surfaces are slightly rotated against each other, so that the cutting between the corner points 16 and 17 against each other are inclined.
• a cutting insert 10 has been combined for the production of a crankshaft undercut with a cutting plate 19 in the upper region over a 90 ° angle cutting edge for the production of an oil collar or a 90 ° -Schu! Ter and on the opposite side 192 has a cutting edge suitable for making a pintle diameter on a crankshaft.
• the free surface 193 is inclined on this side by a positive clearance angle.
• All indexable inserts are pierced by a common mounting hole 18, which extends from roof surface to roof surface.

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Publications (1)

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• 2005
  • 2005-06-02 DE DE102005025815A patent/DE102005025815A1/de not_active Withdrawn
• 2006
  • 2006-04-04 BR BRPI0611333-8A patent/BRPI0611333A2/pt not_active IP Right Cessation
  • 2006-04-04 KR KR1020077027748A patent/KR101299513B1/ko not_active IP Right Cessation
  • 2006-04-04 CN CN200680012684.0A patent/CN101160189B/zh not_active Expired - Fee Related
  • 2006-04-04 EP EP06722746A patent/EP1896210A1/de not_active Withdrawn
  • 2006-04-04 CA CA002609384A patent/CA2609384A1/en not_active Abandoned
  • 2006-04-04 RU RU2007144543/02A patent/RU2429109C2/ru not_active IP Right Cessation
  • 2006-04-04 JP JP2008513910A patent/JP5221342B2/ja not_active Expired - Fee Related
  • 2006-04-04 US US11/919,112 patent/US8500375B2/en not_active Expired - Fee Related
  • 2006-04-04 MX MX2007014484A patent/MX2007014484A/es active IP Right Grant
  • 2006-04-04 WO PCT/DE2006/000596 patent/WO2006128410A1/de active Application Filing

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