WO2006101461A1 - Fraise - Google Patents

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Publication number
WO2006101461A1
WO2006101461A1 PCT/SI2006/000007 SI2006000007W WO2006101461A1 WO 2006101461 A1 WO2006101461 A1 WO 2006101461A1 SI 2006000007 W SI2006000007 W SI 2006000007W WO 2006101461 A1 WO2006101461 A1 WO 2006101461A1
Authority
WO
WIPO (PCT)
Prior art keywords
milling cutter
milling
diameter
cutting blades
working area
Prior art date
Application number
PCT/SI2006/000007
Other languages
English (en)
Inventor
Igor Hrovatic
Original Assignee
Igor Hrovatic
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 Igor Hrovatic filed Critical Igor Hrovatic
Publication of WO2006101461A1 publication Critical patent/WO2006101461A1/fr

Links

Classifications

    • 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
    • B23C2210/00—Details of milling cutters
    • B23C2210/24—Overall form of the milling cutter
    • B23C2210/242—Form tools, i.e. cutting edges profiles to generate a particular form
    • 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

Definitions

  • the invention refers to treatment of materials, especially to milling, namely to milling cutters, which are characterized by shape, and in particular to plain-milling cutters, which enable frontal and peripheral milling by means of non-exchangeable cutting blades, and in addition to that the invention may also relate to construction characteristics of such milling cutters.
  • the invention is based on a problem, how to create a milling cutter for both frontal and peripheral milling, especially a plain-milling cutter, which should be sufficiently stiff and rigid and should moreover even upon several sharpening operations enable efficient milling by relatively high cutting speed and at the same time also at a desired depth, which can even exceed the length of the working area of a common milling cutter, and which should at the same time be able to withstand high dynamic bending and torsion stresses, to which the milling cutter is exposed during its use.
  • Plain-milling cutters are rotation tools intended for treatment of materials by means of cutting, and are adapted for being clamped into appropriate clamping assembly, which is driven and turned around its longitudinal axis.
  • the plain-milling cutter comprises a smooth cylindrical or conical clamping area, to which a working area is co-axially connected, which comprises a desired number equidistant in the circumferential direction arranged peripheral cutting blades extending along the belonging helices, and to each peripheral blade also an appropriate front blade is adapted on the front surface of the milling cutter.
  • two areas are available on such milling cutter, namely the clamping area and the working area, in which said cutting blades are available.
  • said clamping area together with the core of the working area forms a stiff and rigid load-bearing portion of the milling cutter, while the helices and in particular the belonging cutting edges are thermally or also otherwise treated, by which appropriate hardness and wearing resistance may be achieved, but are on the contrary also pretty low resistance o rapture.
  • Such milling cutter is described in JP 0307321OA, namely a cutting tool with cylindrical clamping area and working area, where the diameter of the clamping area is greater than the diameter of the working area, and a rounded stair-like transition is available there-between.
  • Such milling cutter excels in extreme stiffness and is therefore on the basis of appropriate choice of material and/or surface or thermal treatments no doubt able to be used in high-speed cutting processes.
  • the depth of milling is always limited by the length of the working area, while machining by means of peripheral cutting blades up to such depth, which would exceed the length of the working area, is obviously impossible due to presence of said thicker clamping area.
  • a plain-milling cutter is described in CH 597 961, where a smooth cylindrical area is foreseen between the working area and the clamping area.
  • the invention refers to a milling cutter, namely a rotational machining tool, which is intended for machining of metals by means of cutting thereof.
  • Such cutter is adapted for being clamped into appropriate clamping assembly of each disposable machining appliance, in particular a plain-milling cutter, which comprises a clamping area having a diameter as well as a working area having a diameter.
  • a plain-milling cutter which comprises a clamping area having a diameter as well as a working area having a diameter.
  • Several cutting blades are available in said working area and are arranged preferably in a equidistant manner along the circumference thereof and extend in form of a helices along the periphery of the milling cutter, and front blades are available on the front surface of the milling cutter, which on the periphery of the milling cutter coincide with said peripheral cutting edges.
  • the diameter of the working area is greater than the diameter of the clamping area of such cutter.
  • the working area of the milling comprises at least cylindrical milling portion and in addition to that also a supplemental, at least essentially conical portion, which is co-axially connected to said cylindrical portion, where the peripheral cutting blades of the milling cutter extend along the complete effective milling portion and also along at least major part of said supplemental portion.
  • the diameter of said supplemental portion on its one end, which is faced towards the effective milling portion, is equal to the diameter of said milling portion, while the diameter of said supplemental portion on its residual end, which is faced towards the clamping area, corresponds to diameter of at least that end portion of the clamping area, which is faced towards the working area.
  • the transition between the supplemental portion and the effective milling portion i.e. transition between the working area and the clamping area
  • the peripheral cutting blades extend either along the complete length of the conical supplemental portion or over at least a half of this length.
  • said effective milling portion of the working area is cylindrical
  • the supplemental portion of the working area is conical, namely in form of a truncated cone.
  • the invention allows wide choice of peripheral and front cutting blades, which may either be continuous or discontinuous.
  • the front cutting blades and/or the peripheral cutting blades may also be covered with at least one non-removable layer, which allows subsequent sharpening of cutting blades by means of grinding.
  • Fig. 1 is a front view of the milling cutter according to the invention.
  • Fig. 2 is a presentation of the milling cutter during the use thereof.
  • Fig. 3 is a further presentation of the milling cutter during the use, however in such conditions, where the milling depth is greater than the length of the effective working area of the cutter.
  • the shown embodiment refers to a plain-milling cutter, which generally consists of a working area 1 and a clamping area 2.
  • any geometrical term which refer to a shape of particular area, actually relates to a general shape of a peripheral contour of a rotational geometric solid which is each time generated during rotation of a corresponding milling tool around the longitudinal axis thereof, which means the shape as generated during the use of such tool.
  • the clamping area 2 of the milling cutter is smooth and cylindrical and smooth and is therefore adapted for clamping into appropriate clamping assembly, which is schematically shown in Figs. 2 and 3.
  • Said working area 1 of the milling cutter according to the invention consists of a cylindrical effective milling portion 11 as well as of a conical supplemental portion 12.
  • said working area 1 comprises front cutting blades 13, which are available on the front surface 130 of the working area, and peripheral cutting blades 14, which are available on corresponding helices 140, which extend both along the cylindrical effective milling portion 11 and also along at least essentially conical supplemental portion 12.
  • Said peripheral cutting blades 14 may be either continuous or discontinuous, which generally also applies for the front cutting blades 13.
  • Diameter D of the working area 1 corresponds to each corresponding diameter of the cylindrical effective milling area 11 irrespective to the fact, that the milling cutter may either be brand new or has already been used and already sharpened once or several times. Said diameter D must in each case be greater than the diameter d of the clamping area 2, the length L of which is marked in Fig. 1. According to the invention, a conical or at least essentially conical portion 12 with the length C is foreseen between the cylindrical effective milling area 11 with the length B and diameter D, and the clamping area 2 in order to obtain a smooth and absolutely continuous transition between said effective milling area 11 and the clamping area 2.
  • Said supplemental portion 12 is designed in such a manner, that the minor diameter thereof corresponds to diameter d of the clamping area 2, and the maximum diameter thereof corresponds to the diameter D of the cylindrical milling portion 11 of the working area 1 , which is however in any case greater than the diameter d of the clamping area 2.
  • each helix 140 with the belonging peripheral cutting blade 14 extends along the complete length B of the cylindrical milling portion 11, and at the same time along at least majority of the supplemental, at least approximately conical portion 12. Regardless to the fact, that the diameter D of the active cylindrical milling portion
  • peripheral cutting blades 14 has practically no influence with regard to continuity and bearing capability of the milling cutter in the vital portions thereof, so that even upon sharpening the dynamic bearing characteristics are maintained in the complete extent. Besides, all performances, which relate to formation and conveying of milling chips, are also maintained, since sharpening of the cutting blades 14 even in the area of said conical portion

Landscapes

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

Abstract

La présente invention a trait à une fraise présentant une zone de travail (1) de diamètre (D) supérieur au diamètre (d) d'une zone de serrage (2), ladite fraise comportant au moins une portion additionnelle sensiblement conique (12), qui s'étend vers une portion de serrage (2) et de manière coaxiale par rapport à au moins une portion efficace de fraisage sensiblement cylindrique (11), qui forme partie d'une zone de travail (1) ayant un diamètre (D) supérieur au diamètre (d) de la zone de serrage (2). Le diamètre (D) de ladite portion additionnelle (12) adjacente à la portion de fraisage efficace (11) correspond au diamètre (D) de ladite portion de fraisage (11), et le diamètre (d) de la portion additionnelle (12) adjacente à la zone de serrage (2) correspond au diamètre (d) de la portion d'extrémité de la zone de serrage (2), tournée vers la zone de travail (1). Une telle fraise se caractérise en ce qu'elle présente une excellent rigidité et permet en outre une fraisage à grande vitesse par la réalisation d'une grande profondeur, qui dépasse la longueur de la zone de travail (1), même lorsque des lames de coupe latérales (14) de la fraise ont déjà été aiguisés plusieurs fois.
PCT/SI2006/000007 2005-03-23 2006-03-14 Fraise WO2006101461A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SIP-200500075 2005-03-23
SI200500075A SI21993A (sl) 2005-03-23 2005-03-23 Frezalo

Publications (1)

Publication Number Publication Date
WO2006101461A1 true WO2006101461A1 (fr) 2006-09-28

Family

ID=36660144

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SI2006/000007 WO2006101461A1 (fr) 2005-03-23 2006-03-14 Fraise

Country Status (2)

Country Link
SI (1) SI21993A (fr)
WO (1) WO2006101461A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302095B6 (cs) * 2009-07-24 2010-10-06 Diviš@Václav Stopková fréza

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039427A (en) * 1933-10-31 1936-05-05 Kinzbach Frank Milling cutter
GB753233A (en) * 1953-10-03 1956-07-18 Charles Benjamin Hoole Improvements in rotary burrs
US3344497A (en) * 1966-03-23 1967-10-03 Osborne William Albert Self-cleaning router
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
DE8609688U1 (de) * 1986-04-09 1986-09-04 Lothar Frost Präzisionswerkzeuge Schleifmittel, 7200 Tuttlingen Fräswerkzeug
JPH0453615A (ja) * 1990-06-19 1992-02-21 Hitachi Tool Eng Ltd エンドミル
EP0562342A1 (fr) * 1992-03-27 1993-09-29 The Budd Company Outil de coupe
US5701578A (en) * 1996-11-20 1997-12-23 Kennametal Inc. Method for making a diamond-coated member

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2039427A (en) * 1933-10-31 1936-05-05 Kinzbach Frank Milling cutter
GB753233A (en) * 1953-10-03 1956-07-18 Charles Benjamin Hoole Improvements in rotary burrs
US3344497A (en) * 1966-03-23 1967-10-03 Osborne William Albert Self-cleaning router
US4285618A (en) * 1979-10-12 1981-08-25 Shanley Stephen E Jr Rotary milling cutter
DE8609688U1 (de) * 1986-04-09 1986-09-04 Lothar Frost Präzisionswerkzeuge Schleifmittel, 7200 Tuttlingen Fräswerkzeug
JPH0453615A (ja) * 1990-06-19 1992-02-21 Hitachi Tool Eng Ltd エンドミル
EP0562342A1 (fr) * 1992-03-27 1993-09-29 The Budd Company Outil de coupe
US5701578A (en) * 1996-11-20 1997-12-23 Kennametal Inc. Method for making a diamond-coated member

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 242 (M - 1259) 3 June 1992 (1992-06-03) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ302095B6 (cs) * 2009-07-24 2010-10-06 Diviš@Václav Stopková fréza

Also Published As

Publication number Publication date
SI21993A (sl) 2006-10-31

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