Classifications

• • 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
  • 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
  • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
  • B23C5/2265—Securing arrangements for bits or teeth or cutting inserts by means of a wedge
  • B23C5/2278—Securing arrangements for bits or teeth or cutting inserts by means of a wedge for plate-like cutting inserts fitted on an intermediate carrier, e.g. shank fixed in the cutter body
• • 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
  • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
  • B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
• • 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
  • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
  • B23C5/24—Securing arrangements for bits or teeth or cutting inserts adjustable
  • B23C5/2462—Securing arrangements for bits or teeth or cutting inserts adjustable the adjusting means being oblique surfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2200/00—Details of milling cutting inserts
  • B23C2200/20—Top or side views of the cutting edge
  • B23C2200/205—Discontinuous cutting edges
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2210/00—Details of milling cutters
  • B23C2210/54—Configuration of the cutting part
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
  • B23C2222/04—Aluminium
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2226/00—Materials of tools or workpieces not comprising a metal
  • B23C2226/12—Boron nitride
  • B23C2226/125—Boron nitride cubic [CBN]
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2226/00—Materials of tools or workpieces not comprising a metal
  • B23C2226/31—Diamond
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23C—MILLING
  • B23C2240/00—Details of connections of tools or workpieces
  • B23C2240/08—Brazed connections
• • 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
  • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
  • Y10T407/1908—Face or end mill
  • Y10T407/1912—Tool adjustable relative to holder
  • Y10T407/1914—Radially
  • Y10T407/1916—And axially
  • Y10T407/1918—Selectively
• • 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
  • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
  • Y10T407/1932—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with means to fasten tool seat to holder
• • 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
  • Y10T407/1962—Specified tooth shape or spacing
• • 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
  • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
  • Y10T407/2272—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder
  • Y10T407/2282—Cutters, for shaping including holder having seat for inserted tool with separate means to fasten tool to holder including tool holding clamp and clamp actuator
  • Y10T407/2284—Wedge clamp element

Definitions

• the invention relates to a Fräsmesserkopf with several, used in recesses of a base cutter carriers, are soldered to the respective cutting, the blade carriers are each axially adjustable via a wedge body and fixed by means of clamping elements in Fräsmesserkopf.
• Such a milling cutter head is known in principle from DE 40 03 862 C2.
• the recesses for the blade carrier extend in the blade head described therein of the one end face of its base parallel to the axis of rotation and at a distance from the circumference, the cutting edges of the cutting plates used protrude only slightly beyond the end face of the body.
• the axes of the round wedges serving for clamping are each skewed to the axes of the cutting plate carriers carrying the cutting plates.
• another round wedge with differential screw for axial adjustment of each cutting plate is provided and arranged in a recess which extends radially inwardly from the circumference of the base body. For axial adjustment and radially outward bracing geometrically equal round wedges are used.
• this cutter head As an advantage of this cutter head is highlighted that due to the location of the cutting plate carrier receiving recesses parallel to the axis of rotation of the body only radially directed centrifugal forces occur without axial component. These forces can be well intercepted, because the recesses are not located directly on the circumference of the body, but radially inwardly at a distance from the circumference.
• the knife head is therefore also suitable for extremely high speeds and the centrifugal forces occurring then.
• a fine adjustment of the cutting elements in the axial direction without interference with radial components is possible.
• Such cutters are used in orthogonal rotary milling without axial feed with eccentric tool adjustment, especially in the car crankshaft production.
• the workpiece is processed in one or more revolutions with the multi-bladed milling cutter mentioned above.
• the workpiece turns opposite the cutter about its longitudinal axis, which is vertical to the cutter axis of rotation. Since the blades of the milling cutter head rotate with their points on different radii, different cutting arc lengths result, which causes the cause of uneven cutting edge stress along their length and consequently uneven wear.
• At least one of a plurality of cutting edges is angled and has with respect to the Fräsmesserkopfachse a longer radially outer portion and a radially inner shorter portion which is angled at 3 ° to 7 °, preferably 5 °, so that the two sections a Form angles of 177 ° to 173 °, preferably 175 °.
• the shorter cutting edge sections are taken out of the cutting process at the beginning of the use of a fitted with new cutting cutter blade head.
• the longer cutting edge makes the final cut and thus wears faster than the short cutting edges.
• the convex surface profile is constantly adapted to the wear profile and thus maintained over a longer cutting contact time
• the aspect ratio of the shorter portion to the longer portion of the angled edge is selected to be between 4:17 and 6:17, preferably 5:17.
• the milling cutter head has three blade carriers with cutting edges, which are arranged at an angle of 120 ° to each other.
• one of three or two of three cutting edges is angled, while the non-angled cutting edge is linear.
• the ends of the cutters are rounded, preferably at a radius of 0.1 mm and / or if the cutting edges themselves are rounded, preferably at a radius of 0.01 mm.
• the cutting edges consist of a hard metal, CBN or PCD body.
• Fig. 1 is a perspective view of a Fräsmesserkopfes with three
• FIG. 2 is a plan view of the Fräsmesserkopf of FIG. 1,
• FIG. 3 is a wireframe-like representation of the Fräsmesserkopfes of FIG. 1,
• Fig. 4 is a schematic diagram of the relative position of a blade carrier to a
• Fig. 5 is a side view of a cutter support with an angled
• Fig. 6 is a detail view of the Schneidabwinklung and
• FIG. 7 shows a detailed view of a cutting edge of a cutter carrier according to FIG. 4.
• the milling cutter head 10 essentially consists of a base body 10, in which three blade carriers 11 are arranged, each with soldered cutting edges 12.
• the blade carriers 11 are each used in parallel to the longitudinal axis 13 arranged bores.
• further bores are provided in the base body 10, in which wedge bodies 14 are arranged, which are displaceable in the radial direction via an adjusting screw 15, preferably a double-threaded screw.
• these wedge bodies 14 have wedge surfaces 16 which run obliquely to the radial plane of the base body, so that during a radial movement of the wedge body 14, the blade carrier 11 is displaceable along its longitudinal axis, ie in the radial direction.
• the blade carrier 11 For clamping the blade carrier 11 is a clamping ring 17 (see FIGS. 1 and 2) and a clamping piece 18 which is centrally located and three clamping surfaces 19 which bear against corresponding clamping surfaces 20 of the blade carrier.
• the clamping piece 18 can be fixed by means of a screw 21, which is preferably designed as a double-threaded screw.
• the clamping piece 18 is used in the illustrated embodiment for fixing three Schneidenträgem 11, each having a closed surface 20. Due to the design of the clamping piece and the arrangement of the clamping surfaces 19 in a triangle shape, an exact alignment of the blades, the blade carrier is achieved at an angle of 120 ° to each other.
• Each cutter carrier can be adjusted axially via the circular wedge 14 and the associated screw 15.
• the clamping ring 17 For axially parallel alignment of the cutting inserts or the cutting insert carrier is the clamping ring 17, which is sleeve-shaped.
• the main body 10 and the clamping ring 17 have in the clamping state adjacent cylindrical surfaces.
• the blade carrier 11 also has radially outside a narrow ground surface 21 which extends longitudinally axially. This surface 21 provides a double line contact between the clamping ring and the cutting insert.
• the difference between the at least in essence rectilinear cutting edges 12 and the angled cutting edge 12 ' is particularly clear from Fig. 6 and 7. While the cutting edge 12 extends straight over almost its entire length and only over a minimum, outer area a of z. B.
• 0.5 mm at a total cutting length of 8.5 mm has a bevel inclined by 12 ° and at the other end a corner rounding with a radius R of 0.1 mm, it can be seen from Fig. 5 and 6, that at the radial inside, a cutting edge piece of length b, which extends at an 8.5 mm long edge length of 2.5 mm, is angled at 5 °. In addition, the corner is rounded even under a radius R of 0.1 mm.
• only one cutting edge is angled over a dimension b, whereas the other two cutting edges (except for the short-angular bend b and the edge rounding) are rectilinear.
• the illustrated cutter is particularly suitable for orthogonal Drehfräsin, but also the fine milling of aluminum workpieces.
• a particular application of the milling cutter according to the invention is the finishing of crankshafts (instead of grinding), in particular, the wet grinding can be replaced, which has the disadvantage that contaminated cooling lubricants must be disposed of costly and laborious.
• the milling cutter head according to the invention fulfills high demands on concentricity, surface quality, convexity of the position of the seat and allows economical production of piece items.

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=37735150

Family Applications (1)

Country Status (10)

Families Citing this family (4)

Family Cites Families (10)

• 2005
  • 2005-12-02 DE DE202005018963U patent/DE202005018963U1/de not_active Expired - Lifetime
• 2006
  • 2006-11-21 CN CN2006800443003A patent/CN101316675B/zh not_active Expired - Fee Related
  • 2006-11-21 US US12/091,992 patent/US7841810B2/en not_active Expired - Fee Related
  • 2006-11-21 KR KR1020087013103A patent/KR20080070051A/ko not_active Application Discontinuation
  • 2006-11-21 JP JP2008542589A patent/JP2009517231A/ja not_active Ceased
  • 2006-11-21 CA CA002629097A patent/CA2629097A1/en not_active Abandoned
  • 2006-11-21 RU RU2008121564/02A patent/RU2414333C2/ru not_active IP Right Cessation
  • 2006-11-21 EP EP06828547A patent/EP1954434A1/de not_active Withdrawn
  • 2006-11-21 BR BRPI0619773-6A patent/BRPI0619773A2/pt not_active IP Right Cessation
  • 2006-11-21 WO PCT/DE2006/002043 patent/WO2007062622A1/de active Application Filing

Non-Patent Citations (1)

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