US20100226726A1 - Shank drill - Google Patents

Shank drill Download PDF

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Publication number
US20100226726A1
US20100226726A1 US12/533,269 US53326909A US2010226726A1 US 20100226726 A1 US20100226726 A1 US 20100226726A1 US 53326909 A US53326909 A US 53326909A US 2010226726 A1 US2010226726 A1 US 2010226726A1
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United States
Prior art keywords
chip
shank
shank cutter
cutter
cutter according
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Abandoned
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US12/533,269
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English (en)
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Martin STRASMANN
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Assigned to JEORG GUEHRING reassignment JEORG GUEHRING ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STRASMANN, MARTIN
Publication of US20100226726A1 publication Critical patent/US20100226726A1/en
Priority to US13/628,370 priority Critical patent/US20130022416A1/en
Priority to US14/606,186 priority patent/US9352400B2/en
Assigned to GUEHRING, JOERG reassignment GUEHRING, JOERG CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY DATA PREVIOUSLY RECORDED AT REEL: 023548 FRAME: 0568. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: STRASMANN, MARTIN
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    • 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
    • B23C2210/0485—Helix angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/04—Angles
    • B23C2210/0485—Helix angles
    • B23C2210/0492—Helix angles different
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/08—Side or top views of the cutting edge
    • B23C2210/086—Discontinuous or interrupted cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/08—Side or top views of the cutting edge
    • B23C2210/088—Cutting edges with a wave form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/28—Arrangement of teeth
    • B23C2210/282—Unequal angles between the cutting edges, i.e. cutting edges unequally spaced in the circumferential direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2210/00—Details of milling cutters
    • B23C2210/48—Chip breakers
    • B23C2210/486—Chip breaking grooves or depressions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2220/00—Details of milling processes
    • B23C2220/60—Roughing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2250/00—Compensating adverse effects during milling
    • B23C2250/16—Damping vibrations
    • 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
    • Y10T407/1946—Face or end mill
    • Y10T407/1948—Face or end mill with cutting edge entirely across end of tool [e.g., router bit, end mill, etc.]
    • 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
    • Y10T407/1956—Circumferentially staggered
    • Y10T407/1958—Plural teeth spaced about a helix
    • 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
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/303752—Process

Definitions

  • the invention relates to a shank cutter according to the preamble of patent claim 1 .
  • Such cutters have as a common feature a shank as the chucking part, which is inserted into the tool holder.
  • Such cutters are used for example as slotting cutters or die-sinking cutters with a flat or round end.
  • Such cutters are furthermore characterised in that they have a plurality of circumferential cutting edges in the region of their cutting section on the cutter ridges which are separated from each other by flutes, which cutting edges run in a helical manner and are in each case configured with a roughing profile in such a manner that the circumferential cutting edges are given chip-separating grooves, with the chip-separating grooves of cutter ridges which are adjacent in the circumferential direction being axially offset with respect to each other.
  • Such roughing profiles are standardised in “round” and “flat” versions for example in DIN 1836, with a differentiation being made between “extra coarse”, “coarse” and “fine” with regard to the structure of the profile, where applicable with regard to the pitch with which the chip-separating grooves are introduced into the cutter ridges.
  • the profile structure such as also these pitches of the recesses which form the chip-separating grooves, depends on the tool, with the pitch being selected to be finer with increasing hardness of the material to be machined.
  • the pitch can furthermore be dependent on the tool diameter, with it being the case here that the smaller the diameter of the shank cutter, the finer the pitch.
  • the interrupted that is, profiled profile of the tool cutting edge of the roughing cutter allows a more rapid breaking of the chip.
  • the roughing cutter is however generally not suitable for the production of a uniform surface with a high surface quality. Owing to the short-chipping behaviour of the removed material, however, much better chip removal is produced than with the finishing cutter. Owing to the high material removal rate, roughing tools of the type mentioned at the start are also very suitable for work in which it is a matter of removing material as effectively and quickly as possible to a finishing level of for example 0.5 mm before a work step with a finishing tool. Also, the cutting pressure and the power consumption of the machine are lower when working with such roughing cutters, and the tool can produce a high cutting depth and cutting width.
  • finishing cutters that is, shank cutters with smooth cutting edges
  • the cutting edge geometry has been changed—as described for example in the document DE 37 06 282 C2—by working with at least two unequal angles of twist in the region of the circumferential cutting edges, that is, the main cutter edges.
  • the invention is therefore based on the object of developing a shank cutter of the type described at the start, in particular according to the preamble of patent claim 1 in such a manner that it is in particular suitable for providing a high material removal rate and at the same time machining the workpiece with good surface quality while ensuring high tool life travel, low power consumption of the machine and reduced cutting pressure.
  • the measure of varying the angle of twist of the circumferential cutting edges which are at a circumferential distance from each other is combined with a new geometry of the chip-separating grooves, as a result of which a cutting tool is produced which combines only the advantages of conventional roughing and finishing cutters with regard to chip formation, power consumption of the machine, cutting pressure, chip removal, the cutting width which can be achieved and the surface quality.
  • the shank cutter according to the invention produces short chips as before and therefore has a low power consumption. Furthermore, the cutting pressure is low, and good chip removal is produced owing to the short chips. Owing to the flattened roughing profile in connection with the measure of at least two circumferential cutting edges having different angles of twist, the tendency to vibrate of the cutter, which is normally pronounced because of the roughing profile, is considerably reduced, so that very high quality surfaces with a good tool life travel can be produced over the preferably essentially flattened regions of the roughing profile or with a roughing/finishing profile to DIN 1836, since the rounded portions of the chip-separating grooves in the transition to the preferably essentially flattened section of the roughing profile effectively ensure soft cutting with minimised impact loading of the circumferential cutting edges over the service life of the tool.
  • the cutting tool according to the invention is in this manner particularly suitable for working with high cutting widths and depths, for example when cutting grooves, with the chip shape remaining as favourable as with pure rough-machining.
  • the shank cutter can in principle be equipped with any number of circumferential cutting edges. With more than three circumferential cutting edges or cutter ridges, it is advantageous according to claim 2 to form the angles of twist of adjacent circumferential cutting edges differently in each case.
  • the different angles of twist of the circumferential cutting edges at the same time means that what is known as the pitch of the shank cutter, that is, the distribution of the circumferential cutting edges as seen in radial section, changes in the axial direction. It is advantageous according to claim 4 to keep the pitch of the cutter equal in a radial plane which lies in the cutting section, in particular if the shank cutter is equipped with a cutting section of considerable axial length and the differences in the angles of twist are comparatively great. It is however equally possible to place this radial plane outside the cutting section, especially if the shank cutter according to the invention in any case produces very short chips and therefore is to be considered much less critical than a conventional finishing cutter with regard to chip removal.
  • the chip-separating grooves For example, it is possible to grind the chip-separating grooves into the circumferential cutting edges by means of a profile-grinding disc.
  • the chip-separating grooves are angled towards a plane of the shank cutter which is perpendicular to a longitudinal axis of the shank cutter, as a result of which it is possible to influence chip formation in an advantageous manner.
  • the chip-separating grooves can in each case in sections follow the course of a helix, the lead of which corresponds to the pitch of the roughing profile or to a whole multiple of the pitch.
  • the flank radius, which in each case faces the cutter shank is smaller in the chip-separating groove than the other flank radius, in particular in the case where the flank radius which faces the cutter shank first contributes to chip formation.
  • the chipping output, the surface quality and the service life of the tool can be further optimised by the choice of the material of the shank cutter. It has been found that the design according to the invention reveals its particular advantages if the tool as a whole or at least in the region of the cutting section is produced from a hard material, with for example solid hard metal, but also a cermet material being used as the hard material.
  • FIG. 1 shows a schematic side view of the shank cutter with four circumferential cutting edges
  • FIG. 1A shows detail “IA” in FIG. 1 in an enlarged illustration
  • FIG. 2 shows a section of the roughing profile according to the invention in an enlarged illustration
  • FIG. 3 shows a side view of the shank cutter in order to illustrate the position of the cross section on which the circumferential cutting edges are arranged with the same angular distance from each other;
  • FIG. 4 shows the end view of the tool according to FIG. 3 , looking along the arrow “IV”;
  • FIG. 5 shows the section according to V-V in FIG. 3 in an enlarged illustration
  • FIG. 6 shows a schematic winding of the shank cutter according to FIG. 3 ;
  • FIG. 7 shows a perspective side view of the shank cutter according to the invention.
  • FIG. 8 shows the end view of a modified embodiment of the shank cutter, in which equal pitch is present on the end face
  • FIG. 9 shows a detailed view of a circumferential surface of a modified exemplary embodiment of the shank cutter
  • FIG. 10 shows a schematic diagram to illustrate the chip formation of adjacent circumferential cutting edges
  • FIG. 11 shows a modified roughing profile in an enlarged illustration.
  • a shank cutter is referred to with the reference symbol 20 and has a cutting section 22 and a clamping shank 24 .
  • the cutter axis is referred to with 21 .
  • both the cutting section and the clamping shank have a cylindrical configuration.
  • the cutting section can however equally have a different envelope, for example an envelope in the shape of a cone surface.
  • the line 26 indicates that the shank cutter has what is known as a neck countersink, that is, the outer diameter of the clamping shank 24 is slightly bigger than the nominal diameter of the cutting section 22 .
  • the cutting section 22 has a plurality of circumferential cutting edges 26 - 1 to 26 - n , which run in a helical manner and between which flutes 28 - 1 to 28 - n are formed.
  • the circumferential cutting edges are the main cutting edges.
  • auxiliary cutting edges which corresponds to the number of circumferential cutting edges in a conventional manner so that a more detailed description of this geometry can be omitted here.
  • the individual circumferential cutting edges are in the exemplary embodiment shown in each case equipped with a flattened roughing profile 30 which is formed by chip-separating grooves 32 and a flattened section 34 which lies between them.
  • a central section can also be present instead of the flattened section, which central section follows a preferably slightly convex line as viewed in the longitudinal section of the cutter.
  • the chip-separating grooves 32 extend in the exemplary embodiment shown over the entire width of the cutter ridges, which are referred to with 36 - 1 to 36 - n , in such a manner that the chip-separating grooves of cutter ridges 26 - 1 and 26 - 2 , 26 - 2 and 26 - 3 , 26 - n and 26 - 1 which are adjacent in the circumferential direction are axially offset with respect to each other so that the parts of material which are not cut by a circumferential cutting edge can be removed by the next cutting edge.
  • the chipping thickness is in this manner doubled, so that according to Kienzle and Victor's machining principle the specific cutting force is reduced and the torque and the power consumption are less than with tools with a continuous circumferential cutting edge, that is, in finishing cutters.
  • FIG. 2 shows schematically and on a greatly enlarged scale how the roughing profile 30 is equipped in detail in the shank cutter according to the invention.
  • the individual chip-separating grooves 32 have a rounded groove base 40 with an extremely small radius R 40 .
  • the chip-separating groove 32 merges into the flattened section 34 by means of a first flank radius RF 1 .
  • the flank radius RF 1 is on the side of the chip-separating groove 32 which faces away from the cutter shank 24 .
  • the respective chip-separating groove 32 merges into the flattened section 34 of the roughing profile by means of a second flank radius RF 2 .
  • the pitch of the roughing profile that is, the axial distance between chip-separating grooves 32 of a circumferential cutting edge, is referred to with T and the depth of the roughing profile 30 is referred to with H.
  • the values RF 1 , RF 2 , T and H, and thus also the axial dimension A 34 of the flattened section 34 are variable in order to carry out an adaptation to the chipping conditions, that is, to the material to be chipped, to the cutting speed and to the material removal rate. It has been found, however, that the following conditions are of particular advantage:
  • the flank radius RF 1 and RF 2 should be in the range from 0.1 to 1 mm, particularly preferably from 0.1 to 0.5 mm;
  • the size of the smallest radius RF 40 in the base 40 of the chip-separating groove 32 should be greater than the flank radius RF 1 or RF 2 ;
  • the flank radius RF 2 which leads during cutting in the direction of rotation, that is, in the cutting direction, of the shank cutter which has a right-handed twist in the embodiment according to FIG. 1 , that is, the flank radius RF 2 , which faces the cutter shank, of the chip-separating groove, should be greater than the flank radius RF 1 which faces away from the cutter shank.
  • the flank radius which first does the cutting work when the roughing profile penetrates the workpiece should be greater than the other flank radius.
  • a further special feature of the shank cutter according to the invention can be seen in that the angle of twist, which referred to with ⁇ 1 to ⁇ n, of the circumferential cutting edges 26 - 1 to 26 - n are different from each other, as follows:
  • At least one angle of twist ⁇ differs from another angle of twist ⁇ of the circumferential cutting edges.
  • angles of twist at least of adjacent circumferential cutting edges differ from each other.
  • an even number of circumferential cutting edges 26 - 1 to 26 - 4 is provided, with in each case two diametrically opposite circumferential cutting edges 26 - 1 and 26 - 3 , 26 - 2 and 26 - 4 having the same angle of twist ⁇ .
  • the circumferential cutting edge 26 - 1 on the cutter ridge 36 - 1 has for example an angle of twist ⁇ 1 , which differs from the angle of twist ⁇ 2 of the adjacent circumferential cutting edge 26 - 2 by 1° to 6°, preferably by 1° to 3°.
  • the angle of twist of the circumferential cutting edge 26 - 1 corresponds exactly to that of the circumferential cutting edge 26 - 3
  • the angle of twist of the circumferential cutting edge 26 - 2 corresponds exactly to that of the circumferential cutting edge 26 - 4
  • the angle of twist ⁇ can vary within wide limits and be for example in the range from 20° to over 50°, depending on the chipping task present in each case.
  • the dimension AGT is approximately 30% of the length L 22 of the cutting section 22 . It is however possible—depending on the field of application and use of the shank cutter and on the difference between the individual angles of twist ⁇ 1 to ⁇ n—to vary the dimension AGT within wide limits. It can even be possible, with a correspondingly small difference between the individual angles of twist of different or adjacent circumferential cutting edges, to make the dimension AGT greater than the dimension L 22 , and even to set it to be negative, that is, to place the radial plane of equal pitch outside the cutting section 22 .
  • FIG. 7 shows a perspective view of a shank cutter which has been tested in use.
  • the chip-separating grooves 32 are introduced, preferably ground, in such a manner that they are slightly angled towards a plane, which is perpendicular to the cutter axis 21 , of the shank cutter.
  • This shape can be realised in that a profiled grinding disc is used to grind the chip-separating grooves, which grinding disc has a profile corresponding to the detail drawing according to FIG. 2 , that is, an outer contour with the radii R 40 , RF 1 and RF 2 .
  • This grinding disc can be angled towards the plane, which is perpendicular to the cutter axis 21 , of the shank cutter at a predefined angle, so that the profiled grinding disc can move along a helix, the lead of which corresponds to the pitch T of the roughing profile 30 with the chip-separating grooves 32 .
  • FIG. 8 schematically shows the end view of a modified embodiment of the shank cutter.
  • the arrangement is such that an equal pitch of the circumferential cutting edges 126 - 1 to 126 - 4 is present on the cutter end.
  • the plane of section V-V in FIG. 3 is at the cutter end in this variant.
  • FIG. 9 shows a modified embodiment of the shank cutter, in which the chip-separating grooves which are referred to with 232 are oriented slightly differently than in the above-described exemplary embodiment.
  • the chip-separating grooves 232 run parallel to a normal plane to the cutter axis 221 .
  • the dashed line 254 indicates that chip-separating grooves are offset by a dimension V by cutter ridges 236 - 1 and 236 - 2 which are adjacent in the circumferential direction, where:
  • T means the pitch of the roughing profile (cf. FIG. 2 ) and n means the number of circumferential cutting edges 226 - 1 to 226 - n.
  • VPU refers to the feed rate per revolution of the shank cutter.
  • T is the pitch of the roughing profile.
  • V 1 to V 4 refer to the axial offset of the circumferential cutting edges which are adjacent to flattened sections 34 of the roughing profile. The equal or unequal pitch of the circumferential cutting edges (cf. FIG.
  • the size of the chipping thickness DS 1 is slightly less than the size of the subsequent chipping thicknesses DS 2 if the circumferential distance between the circumferential cutting edges which are engaged one after the other is greater than the previous circumferential distance.
  • the shank cutter according to the invention therefore not only operates at an optimum material removal rate, but also in such a manner that a very good workpiece surface can be realised even with large cutting widths and a good service life.
  • the whole shank cutter consists of a hard material, in particular from solid hard metal, as a result of which improved rigidity and an even lower susceptibility to vibration is produced.
  • the service life of the shank cutter can be further optimised by suitable coatings.
  • the geometry of the roughing profile in particular the ratio of the pitch to the axial length of the flattened section and/or the ratio of the pitch to the depth of the chip-separating groove is preferably selected as a function of the physical characteristics of the material to be chipped.
  • the roughing profile is equipped with a completely flattened central section 34 .
  • This geometry is however not absolutely necessary to achieve the advantages according to the invention to a critical extent.
  • the central section can also be rounded, preferably slightly bulged or convex, which will be explained in more detail below using FIG. 11 .
  • the individual chip-separating grooves 332 have a rounded groove base 340 with an extremely small groove radius RN.
  • the chip-separating groove 332 merges into a slightly convex but still essentially flattened central section 334 by means of a first flank radius RF 1 .
  • the flank radius RF 1 is on the side of the chip-separating groove 332 which faces away from the cutter shank.
  • the respective chip-separating groove 332 merges into the central section 334 of the roughing profile by means of a second flank radius RF 2 .
  • the pitch of the roughing profile that is, the axial distance between adjacent chip-separating grooves 332 of a circumferential cutting edge, is again referred to with T and the depth of the roughing profile 30 is referred to with H.
  • the values RF 1 , RF 2 , T and H, and thus also the axial dimension LB of the essentially flattened but convex section 334 are again variable in order to carry out an adaptation to the chipping conditions, that is, to the material to be chipped, to the cutting speed and to the material removal rate.
  • the flank radius RF 1 and RF 2 should be in the range from 0.1 to 1 mm; 2.
  • the size of the smallest radius RN in the base 340 of the chip-separating groove 332 should be greater than the flank radius RF 1 or RF 2 ; 3.
  • the flank radius RF 2 which leads during cutting in the direction of rotation, that is, in the cutting direction, of the shank cutter which has a right-handed twist in the embodiment according to FIG. 1 , that is, the flank radius RF 2 , which faces the cutter shank, of the chip-separating groove, should be greater than the flank radius RF 1 which faces away from the cutter shank.
  • the flank radius which first does the cutting work when the roughing profile penetrates the workpiece should be greater than the other flank radius.
  • the contour of the roughing profile can be formed by four circular line sections.
  • the section with RF 1 is connected to the section with RN, to this the section with RF 2 and to this the section with the radius RK, which can be in the region of the size of the groove radius RN but also bigger than this, preferably by a multiple.
  • the central section 334 can also—differing from a circular line—be formed by another curve.
  • the convexity K of the profile is preferably low in the region of the central section 334 .
  • the following preferably applies, with reference to FIG. 11 :
  • dimension LB refers to the profile length between the flank radii RF 1 and RF 2 .
  • the cutting part can for example be configured with other, conventional cutting edge geometries.
  • angle of twist of the individual circumferential cutting edges can change either continuously or discontinuously over the axial length of the shank cutter.
  • Cutting inserts can also be used instead of cutting edges which are formed in one piece with the shank cutter material.
  • the cutting parts can be configured to be rectangular, with corner chamfer or ball end.
  • the roughing profile can also have an unequal pitch in the individual circumferential cutting edges, that is, irregularly over the axial length. It is also possible to change the cross section of the chip-separating grooves in the circumferential direction.
  • a different profile can be formed on the different cutter ridges. It is also possible to expose individual circumferential cutting edges or diametrical pairs of cutting edges of the circumferential cutting edges.
  • a modification can be made in such a manner that, in the case of 4 circumferential cutting edges, cutting edges 1 and 3 are equipped with a roughing profile, whereas cutting edges 2 and 4 are smooth.
  • the invention thus creates a shank cutter which has a plurality of circumferential cutting edges which run in a helical manner in the region of its cutting section and of which at least one critical number are equipped in each case with a preferably essentially flattened roughing profile with chip-separating grooves with rounded bases, in such a manner that the chip-separating grooves of cutter ridges which are adjacent in the circumferential direction are axially offset with respect to each other.
  • at least one circumferential cutting edge has an angle of twist which differs from the angle of twist of another circumferential cutting edge.
  • the chip-separating grooves of the circumferential cutting edges which are equipped with a roughing profile merge into a preferably essentially flattened central section of the roughing profile by means of a predefined flank radius.
US12/533,269 2009-03-07 2009-07-31 Shank drill Abandoned US20100226726A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/628,370 US20130022416A1 (en) 2009-03-07 2012-09-27 Shank drill
US14/606,186 US9352400B2 (en) 2009-03-07 2015-01-27 Shank drill

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102009012012.2 2009-03-07
DE102009012012 2009-03-07
DE102009002738A DE102009002738A1 (de) 2009-03-07 2009-04-29 Schaftfräser
DE102009002738.6 2009-04-29

Related Child Applications (1)

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US13/628,370 Continuation US20130022416A1 (en) 2009-03-07 2012-09-27 Shank drill

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US20100226726A1 true US20100226726A1 (en) 2010-09-09

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US12/533,269 Abandoned US20100226726A1 (en) 2009-03-07 2009-07-31 Shank drill
US13/628,370 Abandoned US20130022416A1 (en) 2009-03-07 2012-09-27 Shank drill
US14/606,186 Active US9352400B2 (en) 2009-03-07 2015-01-27 Shank drill

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US13/628,370 Abandoned US20130022416A1 (en) 2009-03-07 2012-09-27 Shank drill
US14/606,186 Active US9352400B2 (en) 2009-03-07 2015-01-27 Shank drill

Country Status (4)

Country Link
US (3) US20100226726A1 (de)
EP (1) EP2403673B2 (de)
DE (1) DE102009002738A1 (de)
WO (1) WO2010102605A1 (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110033251A1 (en) * 2009-08-04 2011-02-10 Kennametal Inc. Rotary cutting tool with reverse chipbreaker pattern
US20110170963A1 (en) * 2010-01-13 2011-07-14 Iscar, Ltd. Cutting Insert Having Cutting Edges with Recessed Portions
US20120020749A1 (en) * 2009-05-25 2012-01-26 Hitachi Tool Engineering, Ltd. Carbide end mill and cutting method using the end mill
EP2730359A1 (de) * 2011-07-05 2014-05-14 OSG Corporation Fingerfräser mit variabler führung
WO2014166731A1 (de) * 2013-04-09 2014-10-16 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Fräswerkzeug
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CN106238793A (zh) * 2016-09-19 2016-12-21 山东大学 一种工艺凸台用立铣刀
US11213901B2 (en) * 2016-12-15 2022-01-04 Kyocera Corporation Rotary tool
US11865630B2 (en) 2016-12-15 2024-01-09 Kyocera Corporation Rotary tool
US20230182218A1 (en) * 2020-06-22 2023-06-15 Sumitomo Electric Hardmetal Corp. Cutting tool
CN113118531A (zh) * 2021-04-16 2021-07-16 江苏科技大学 带有断屑槽的粗精加工通用立铣刀
EP4201564A1 (de) * 2021-12-23 2023-06-28 Walter AG Schaftfräser
WO2023117223A1 (en) * 2021-12-23 2023-06-29 Walter Ag End mill

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US20130022416A1 (en) 2013-01-24
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US9352400B2 (en) 2016-05-31
EP2403673B2 (de) 2021-12-08
EP2403673A1 (de) 2012-01-11
US20150158095A1 (en) 2015-06-11

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