US20120082523A1 - Rotationally driven multi-bevel step tool - Google Patents

Rotationally driven multi-bevel step tool Download PDF

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Publication number
US20120082523A1
US20120082523A1 US13/248,469 US201113248469A US2012082523A1 US 20120082523 A1 US20120082523 A1 US 20120082523A1 US 201113248469 A US201113248469 A US 201113248469A US 2012082523 A1 US2012082523 A1 US 2012082523A1
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United States
Prior art keywords
swarf
cutting
window
bevel
tool 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.)
Abandoned
Application number
US13/248,469
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English (en)
Inventor
Lutfi Bozkurt
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.)
Guehring KG
Original Assignee
Guehring KG
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 Guehring KG filed Critical Guehring KG
Assigned to GUEHRING OHG reassignment GUEHRING OHG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOZKURT, LUTFI
Publication of US20120082523A1 publication Critical patent/US20120082523A1/en
Priority to US13/942,087 priority Critical patent/US20130302100A1/en
Priority to US14/733,216 priority patent/US9321111B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/009—Stepped drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2220/00—Details of turning, boring or drilling processes
    • B23B2220/04—Chamferring
    • 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]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2250/00—Compensating adverse effects during turning, boring or drilling
    • B23B2250/12—Cooling and lubrication
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/40—Flutes, i.e. chip conveying grooves
    • B23B2251/406—Flutes, i.e. chip conveying grooves of special form not otherwise provided for
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
    • Y10T408/45—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product including Tool with duct
    • Y10T408/455—Conducting channel extending to end of Tool
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/78—Tool of specific diverse material
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/81—Tool having crystalline cutting edge
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/905—Having stepped cutting edges
    • Y10T408/906—Axially spaced
    • 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
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/89—Tool or Tool with support
    • Y10T408/909—Having peripherally spaced cutting edges
    • Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel

Definitions

  • the invention relates to a rotationally driven step tool, in particular a step drill for drilling into solid material, with a plurality of in each case single- or multi-edged cutting steps arranged in a staggered manner in the cutting and feed direction according to the preamble of claim 1 .
  • Machining operations which are multi-step, often occur in production technology. So, it is for example a matter of producing axially staggered bores of various diameters, but often also bores with countersinks or combinations of various holes and countersinks.
  • combination tools were developed in order to produce the previously mentioned various machining operations in one work step.
  • Combination tools of this type include step drills, countersinks, step countersinks, step reamers, etc., which are generally designated—where expedient—as step tools in the following.
  • step tools of this type are found in the published documents DE 299 01 414 U1, DE 36 10 016 A1, DE 200 15 550 U1, DE 20 2007 015 595 U1, DE 1785012 U or DE 1 041 324 A.
  • the swarf created in each case in a plurality of cutting steps is conducted away via common flutes.
  • the step tool described in DE 20 2007015595 U1 has two cutting steps with their own flutes in each case.
  • the step drill described in DE 1 041 324 A is virtually a combination of the two previously mentioned step tools, in which three flutes are assigned in each case to a first, third and fifth cutting step and a second and fourth cutting step.
  • DE 1 785 012 A shows and describes a generic multi-step tool in the form of a multi-bevel step drill with two cutting steps of various machining diameters, each cutting step being assigned its own flutes.
  • the invention is based on the object of developing a multi-bevel step tool in such a manner that reliable conduction away of swarf is ensured, particularly in the region of a cutting step with a relatively small machining diameter.
  • the object is achieved by means of a multi-bevel step tool with the features of claim 1 .
  • the rotationally driven multi-bevel step tool has a plurality of in each case single- or multi-edged cutting steps arranged in a staggered manner in the (circumferential or rotational) cutting and (axial or) feed direction with a number of flutes corresponding to the number of cutting edges in each case.
  • the cutting steps therefore have precisely one cutting edge in each case as well as a flute assigned to the cutting edge, whilst in the case of double-, triple-, etc.—edged cutting steps, the cutting steps have a corresponding number of cutting edges as well as a number of flutes corresponding to the number of cutting edges, which flutes are assigned to one cutting edge in each case.
  • Each cutting step therefore has a number of flutes corresponding to the number of the cutting edges present in each case. Flutes which are adjacent in the circumferential direction are delimited from one another in each case by means of a web. The flutes and therefore also the webs lying therebetween can run helically or linearly in relation to the rotational axis of the multi-bevel step tool.
  • the staggering of the cutting steps provides a first or leading cutting step in the cutting and feed direction with a smaller machining diameter and a second or trailing cutting step in the cutting and feed direction with a larger machining diameter.
  • two successive cutting steps in the cutting and feed direction are formed, made up of a leading cutting step in the cutting and feed direction and a trailing cutting step in the cutting and feed direction, for example the first cutting step and the second cutting step or the second cutting step and the third cutting step, etc.
  • a leading cutting step always has a smaller machining diameter than a trailing cutting step.
  • flutes which are adjacent in the circumferential direction, of two cutting steps, which follow one another in the cutting and feed direction, are in each case delimited from one another by a web.
  • the flutes are preferably constructed continuously from the start of the respective cutting step to the outlet at the tool shank, so the flutes of a leading cutting step are longer than the flutes of a trailing cutting step, as long as the flutes run out at the same point in the axial direction.
  • the flutes which are adjacent in the circumferential direction, of two cutting steps, which follow one another in the cutting and feed direction, i.e. a leading cutting step with a smaller machining diameter and a trailing cutting step with a larger machining diameter, are connected via a swarf window which penetrates the web lying therebetween and is open on the circumferential side.
  • the swarf window is therefore located either in the respectively assigned milling face of the leading cutting step or else, in case the multi-bevel step tool is formed from a support body equipped with cutting plates, in the face of the flute of the leading cutting step which extends the respectively assigned milling face.
  • the cutting steps, which follow one another in the cutting and feed directions and the flutes of which are adjacent in the circumferential direction and are in each case connected by a swarf window, are preferably the first and second cutting step, as problems conducting away the swarf have more of a tendency to occur in the region of the first cutting step which has the smallest machining diameter.
  • flutes, which are adjacent in the circumferential direction, of the second and third steps, the third and fourth steps, etc. i.e. any two cutting steps which follow one another in the cutting and feed direction, can also be connected by a swarf window in the web located therebetween, however.
  • the swarf window which is produced e.g. by milling out or grinding out, into the flute, which is adjacent in the circumferential direction, of a trailing cutting step in the cutting and feed direction with a larger machining diameter.
  • the conducting away of the swarf produced in the leading cutting step therefore takes place in the direction of extension of the flutes until the swarf window is reached only via the respective flute of the leading cutting step and from the reaching of the swarf window both in the respective flute of the leading cutting step and in the flute of the trailing cutting step, which is adjacent in the circumferential direction.
  • the radial depth of the flute(s) of the leading cutting step can be dimensioned narrowly, in order, e.g. to obtain a large core diameter.
  • the multi-bevel step tool is used in particular in the form of a multi-bevel step drill for producing injector bores in a cylinder head.
  • the individual cutting steps for example three cutting steps, are preferably constructed in a multi-edged manner in each case with front and circumferential cutting edges equidistantly arranged in the circumferential direction, particularly in a double-edged manner with front and circumferential cutting edges arranged point-symmetrically.
  • the swarf window extends in the radial direction essentially as far as the base of the flute, which is adjacent in the circumferential direction, of the trailing cutting step.
  • the swarf window therefore has a satisfactory radial depth which means that the swarf produced in the leading cutting step can pass over into the flute, which is adjacent in the circumferential direction, of the trailing cutting step and can there be forwarded in the direction of the tool shank.
  • the swarf window is preferably arranged in such a manner in the feed direction that it encompasses at least the start of the trailing cutting edge, in particular in such a manner that an assigned front cutting edge of the trailing cutting step is essentially located centrally in the swarf window. With this position, it is ensured the maximum length of the flute of the trailing cutting step is available for the further transporting of the swarf created in the leading cutting step.
  • the swarf escaping from the flute of the leading cutting step via the swarf window into the flute, which is adjacent in the circumferential direction, of the trailing cutting step is therefore conducted from the start of the trailing cutting step together with the swarf produced in the trailing cutting step in the direction of the tool shank.
  • the radial depth and also the axial length, i.e. the size of the swarf window can be determined as a function of the material to be machined and/or the average size (length, thickness, width) of the swarf to be expected in the leading cutting step. Actually, this means that in the case of relatively long swarf, a deeper longer swarf window can be provided, whilst in the case of relatively short swarf, a flatter shorter swarf window may be sufficient.
  • a shaping of the swarf window which takes account of the respective production conditions, the passing over of the swarf from the flute of the leading cutting step into the flute, which is adjacent in the circumferential direction, of the trailing cutting step can be improved.
  • the swarf window is divided in the axial direction of the tool tip in the direction of the tool shank preferably into a swarf window inlet of increasing radial depth, a swarf window base, which is adjacent to the swarf window inlet and preferably runs axially parallel, and a swarf window outlet of decreasing radial depth, which is adjacent to the swarf window base.
  • the length of the preferably axially parallel running swarf window base can be determined in accordance with the respective requirements.
  • the swarf window base can be dimensioned in a very short manner, as a result of which the swarf window has the shape of a concave recess when observed from the side.
  • the swarf window can have an elongated shape.
  • the swarf window inlet and the swarf window outlet are preferably in each case constructed as concavely curved surfaces.
  • the swarf window base is preferably formed from a planar surface of predetermined axial length or from a for example concavely curved surface of predetermined axial length.
  • the swarf window base is preferably inclined by an predetermined angle with respect to the milling face or a flute face, which extends the milling face of the trailing cutting step, of the flute, which is adjacent in the circumferential direction.
  • the swarf window can be orientated in the direction of the opening through the web located between the flutes which are adjacent in the circumferential direction essentially radially with respect to the rotational axis of the multi-bevel step tool or with respect to the direction of longitudinal extent of the two flutes or else at an angle smaller than 90° relative to the rotational axis of the multi-bevel step tool or relative to the direction of longitudinal extent of the flute of the respectively trailing cutting step.
  • the orientation of the swarf window at an angle smaller than 90° relative to the rotational axis or direction of longitudinal extent of the flute is advantageous compared to an essentially radial orientation to the extent that the swarf is deflected to a lesser extent through the swarf window from the flute of the leading cutting step into the flute, which is adjacent in the circumferential direction, of the trailing cutting step, as a result of which the conducting away of swarf is improved overall.
  • the multi-bevel step tool has an integrally constructed support body made from solid carbide and PCD (polycrystalline diamond) cutting plates arranged on the support body.
  • PCD polycrystalline diamond
  • the flutes can be spirally constructed, preferably they are linearly constructed however.
  • the multi-bevel step tool according to the invention further preferably has an internally located channel system designed for minimum quantity lubrication for providing one or a plurality of cutting steps with coolant/lubricant.
  • the coolant/lubricant supply in this case preferably takes place via discharge openings which are in each case located in the region of a front open area, i.e. in the cutting direction behind an assigned front cutting edge of the leading cutting step.
  • the lubricant leaving at the front in the region of the open area can flow away via the flute, which is adjacent in the circumferential direction, of the trailing cutting step in the cutting direction and thereby support the conducting away of swarf in the trailing cutting step.
  • FIG. 1 a shows a side view of an embodiment of a multi-edged step drill
  • FIG. 1 b shows a frontal view of the step drill from FIG. 1 a;
  • FIG. 2 a shows a side view of the step drill rotated through ⁇ 40° about the rotational axis compared to the side view according to FIG. 1 a;
  • FIG. 2 b shows a frontal view of the step drill rotated through ⁇ 40° about the rotational axis compared to the frontal view according to FIG. 1 b
  • FIG. 3 a shows a side view of the step drill rotated through ⁇ 70° about the rotational axis compared to the side view according to FIG. 1 a;
  • FIG. 3 b shows a frontal view of the step drill rotated through ⁇ 70° about the rotational axis compared to the frontal view according to FIG. 1 b;
  • FIG. 3 c shows a view on an enlarged scale of the tool tip of the step drill from FIG. 3 a ;
  • FIG. 4 shows a perspective illustration of the step drill according to the FIGS. 1 a to 3 c.
  • a multi-edged, machining and rotationally driven multi-bevel step tool in the form of a step drill is specified with the reference number 10 .
  • the step drill 10 is used for producing stepped bores, as are required for example as injector bores in cylinder blocks in automotive technology for accommodating fuel injectors. It is pointed out that the dimension and machining information contained in the figures relates to just one exemplary embodiment of a multi-bevel step tool.
  • the step tool 10 has a tool shank 12 for clamping in a chuck (not shown) and a cutting part 14 .
  • the step drill 10 for example has a length of approx. 191.5 mm and a tool shank diameter of approx. 25 mm.
  • the step drill 10 has three cutting steps 20 , 30 and 40 , the first cutting step 20 having a nominal diameter D 20 , the second cutting step 30 having a somewhat larger nominal diameter D 30 and the third cutting step 40 having an in turn larger nominal diameter D 40 .
  • the dimension D 20 is for example approximately 7.7 mm
  • the dimension D 30 is approximately 18 mm
  • the dimension D 40 is approximately 23.7 mm. All of the nominal diameters are of exceptionally narrow tolerance.
  • the first, second and third cutting steps 20 , 30 , 40 are, as can be seen from the figures, arranged in a staggered manner in the cutting and feed direction, specifically in such a manner that the angular spacing between the first and the second cutting steps is approximately ⁇ 40° and the angular spacing between the first and the third cutting steps is approximately ⁇ 70 °.
  • the start of the second and third cutting steps 30 , 40 is in each case indicated by means of dashed lines.
  • the first, second and third cutting steps 20 , 30 , 40 are double-edged in each case in the exemplary embodiment shown, i.e. constructed with two front cutting edges 21 , 31 , 41 and two circumferential cutting edges 22 , 32 , 42 in each case, as well as with two flutes 23 , 33 , 43 in accordance with the number of cutting edges in each case (cf. FIG. 1 b , FIG. 2 b ).
  • the flutes 23 , 33 , 43 are, as can be seen from the figures, in each case constructed continuously and linearly from the start of the respective cutting step 20 , 30 , 40 to the outlet thereof shortly upstream of the tool shank 12 .
  • Flutes 23 , 33 or 33 , 43 adjacent in the circumferential direction are delimited from one another in each case by means of a web 24 , 34 , 44 .
  • the first cutting step 20 forms a leading cutting step in the cutting and feed direction with respect to the second cutting step 30
  • the second cutting step 30 forms a trailing cutting step in the cutting and feed direction with respect to the first cutting step 20 and also forms a leading cutting step with respect to the third cutting step 40
  • the third cutting step 40 in turn forms a trailing cutting step in the cutting and feed direction with respect to the second cutting step 30 .
  • the step drill 10 has an integrally constructed support body made from solid carbide and PCD (polycrystalline diamond) cutting plates 14 , 15 , 16 arranged on the support body, which in each case form a front and a circumferential cutting edge 21 , 22 , 31 , 32 or 41 , 42 (cf. FIG. 3 c ).
  • PCD polycrystalline diamond
  • the flutes 23 , 33 which are adjacent in the circumferential direction, of the first and second cutting steps 20 , 30 are connected to one another by means of a swarf window 25 which penetrates the web 24 located therebetween and is open on the circumferential side.
  • the swarf window 25 which penetrates the web 24 extends in the radial direction essentially as far as the base of the flute 33 , which is adjacent in the circumferential direction, of the trailing second cutting step 30 .
  • the swarf window 25 extends in the feed direction as far as the start of the second cutting step 30 , specifically essentially so far that the closest front cutting edge 31 of the second cutting step 30 is located essentially centrally in the swarf window 25 (cf. FIG. 2 a ).
  • the swarf window 25 is divided in the axial direction of the tool tip 11 in the direction of the tool shank 12 into a swarf window inlet 25 a of increasing radial depth, a swarf window base 25 b, which is adjacent to the swarf window inlet 25 a and runs axially parallel, and a swarf window outlet 25 c of decreasing radial depth, which is adjacent to the swarf window base 25 b (cf. FIGS. 3 a , 3 c ).
  • the length of the axially parallel running swarf window base 25 b essentially corresponds to the length of the PCD cutting plate 15 which forms the front and circumferential cutting edges 31 , 32 of the second cutting step 30 .
  • the swarf window inlet 25 a and the swarf window outlet 25 b are in each case constructed as concavely curved surfaces.
  • the swarf window base 25 b is formed from a planar surface of predetermined axial length.
  • the swarf window base 25 b is inclined by an predetermined angle, of approximately 5° in the exemplary embodiment shown, with respect to a flute face 36 , which extends the milling face 35 of the second cutting step 30 , of the flute 33 .
  • the tool 10 has a coolant/lubricant supply of the first and second cutting steps 20 , 30 by means of an internally located channel system 50 designed for minimum quantity lubrication, which is indicated dashed in FIG. 1 a .
  • the coolant/lubricant supply takes place via discharge openings 28 , 38 which are in each case located in the region of a front open area 29 , 39 , i.e. in the cutting direction behind an assigned front cutting edge 21 , 31 of the first or second cutting step 20 , 30 .
  • swarf windows can be provided not only between the flutes 23 , 33 , which are adjacent in the circumferential direction, of the first and second cutting steps 20 , 30 , but also between the flutes, which are adjacent in the circumferential direction, of the second and third cutting steps 30 , 40 .
  • a multi-bevel step tool can have just two, or else more than three cutting steps. If more than three cutting steps are present, any flutes, which are adjacent in the circumferential direction, of a leading and trailing cutting step in the cutting and feed direction are connected to one another by means of a swarf window which penetrates the web located therebetween.
  • the swarf window inlet 25 a and the swarf window outlet 25 c with the swarf window base 25 b located therebetween can also be constructed in such a manner that the swarf window 25 is orientated at an angle ⁇ 90° relative to the rotational axis 11 or to the direction of longitudinal extent of the flutes of the trailing cutting step in each case.
  • the various cutting steps can be constructed in a single-edged manner in each case, in deviation from the exemplary embodiment shown or else have more than two cutting edges.
  • all cutting steps can also be supplied with coolant/lubricant.
US13/248,469 2009-03-30 2011-09-29 Rotationally driven multi-bevel step tool Abandoned US20120082523A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/942,087 US20130302100A1 (en) 2009-03-30 2013-07-15 Rotationally driven multi-bevel step tool
US14/733,216 US9321111B2 (en) 2009-03-30 2015-06-08 Rotationally driven multi-bevel step tool

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009003700.4 2009-03-30
DE102009003700 2009-03-30
PCT/DE2010/000366 WO2010115404A1 (de) 2009-03-30 2010-03-30 Drehangetriebenes mehrfasen-stufenwerkzeug

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PCT/DE2010/000366 Continuation WO2010115404A1 (de) 2009-03-30 2010-03-30 Drehangetriebenes mehrfasen-stufenwerkzeug

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US13/942,087 Abandoned US20130302100A1 (en) 2009-03-30 2013-07-15 Rotationally driven multi-bevel step tool
US14/733,216 Active US9321111B2 (en) 2009-03-30 2015-06-08 Rotationally driven multi-bevel step tool

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US14/733,216 Active US9321111B2 (en) 2009-03-30 2015-06-08 Rotationally driven multi-bevel step tool

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US (3) US20120082523A1 (de)
EP (1) EP2414122B1 (de)
JP (1) JP5603924B2 (de)
KR (1) KR101688178B1 (de)
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WO (1) WO2010115404A1 (de)

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US20120051863A1 (en) * 2010-08-25 2012-03-01 Kennametal Inc. Combination end milling/drilling/reaming cutting tool
US9731358B2 (en) 2013-06-06 2017-08-15 Milwaukee Electric Tool Corporation Step drill bit
US20190224759A1 (en) * 2016-07-14 2019-07-25 MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG Step drill
US20190329331A1 (en) * 2018-04-26 2019-10-31 Milwaukee Electric Tool Corporation Step drill bit
CN111408746A (zh) * 2020-05-18 2020-07-14 襄阳顺裕铸造有限公司 一种多工位pcd成型刀
US10766080B2 (en) * 2018-05-07 2020-09-08 Ford Motor Company Multidiameter cutting tool having balanced minimum quantity lubrication flow and method of manufacturing a multidiameter cutting tool

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CN102962500A (zh) * 2012-12-07 2013-03-13 常州奥立思特电子有限公司 用于数控车床的复合刀具
CN104107940A (zh) * 2013-04-19 2014-10-22 苏州文鼎模具有限公司 一种内冷阶梯钻
CN104128642A (zh) * 2013-05-03 2014-11-05 苏州文鼎模具有限公司 一种冷却效果好的内冷阶梯钻
CN104174905A (zh) * 2013-05-21 2014-12-03 苏州锑玛精密机械有限公司 一种缩径内冷钻
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KR20120034158A (ko) 2012-04-10
US9321111B2 (en) 2016-04-26
JP2012521897A (ja) 2012-09-20
US20150266106A1 (en) 2015-09-24
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EP2414122B1 (de) 2013-05-08
WO2010115404A1 (de) 2010-10-14

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