EP1051276A1 - Outil de coupe et configuration de ses tranchants - Google Patents

Outil de coupe et configuration de ses tranchants

Info

Publication number
EP1051276A1
EP1051276A1 EP99965425A EP99965425A EP1051276A1 EP 1051276 A1 EP1051276 A1 EP 1051276A1 EP 99965425 A EP99965425 A EP 99965425A EP 99965425 A EP99965425 A EP 99965425A EP 1051276 A1 EP1051276 A1 EP 1051276A1
Authority
EP
European Patent Office
Prior art keywords
cutting
edges
area
tooth
central axis
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.)
Withdrawn
Application number
EP99965425A
Other languages
German (de)
English (en)
Inventor
Rüdiger VÖGE
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.)
Ledermann GmbH
Ledermann and Co
Original Assignee
Ledermann GmbH
Ledermann and Co
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 Ledermann GmbH, Ledermann and Co filed Critical Ledermann GmbH
Publication of EP1051276A1 publication Critical patent/EP1051276A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
    • B23D61/02—Circular saw blades
    • B23D61/021—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • 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
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor
    • 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
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9319—Toothed blade or tooth therefor
    • Y10T83/9346—Uniformly varying teeth or tooth spacing

Definitions

  • the invention relates to a cutting tool for separating and / or formatting plate material of the type specified in the preamble of claim 1.
  • Known cutting tools consist of a rotatably drivable supporting body, on the circumference of which a plurality of cutting teeth with a cutting edge formed on the tooth profile are arranged.
  • a plurality of cutting teeth with a cutting edge formed on the tooth profile are arranged.
  • smooth cut surfaces and tear-free cut edges are required.
  • the workpiece is split, with the tool such as a circular saw blade making a cut in the plate material.
  • the separated part is shredded in order to then remove it with suction.
  • a chipper is usually used, which creates a cutting surface on the workpiece.
  • chipper There are essentially two types of chipper on the market. In the case of a compact chipper, a row of high-toothed cutting edges is arranged on a support body, followed by one or more rows of low-toothed cutting edges for comminution.
  • the other embodiment is the saw chip, in which only low-tooth rows of blades are arranged on the support body.
  • a tool with a row of high-toothed cutting edges for example in the form of a circular saw blade, is attached to the front of the saw chipper.
  • DE 35 41 077 AI discloses a disk-shaped cutting tool with one arranged on the outer circumference Cutting-bearing teeth, in which the cutting edge is formed by a first cutting part at the cutting tip lying parallel to the axis of rotation of the tool and a subsequent side cutting part, which runs in a plane perpendicular to the axis of rotation.
  • the transition of the cutting edge from the tooth tip to the widest tool location of the side cutting edges is curved and merges tangentially into this widest tool location. This is intended to ensure that the finished edge cut of the tool to be machined is formed by a flat gate which continuously merges into a relatively long cutting part which produces the workpiece edge.
  • EP 0 691 170 AI also describes a saw blade with curved sawtooth flanks.
  • the transition between the cutting edge of the cutting tooth and the curved convex sawtooth flank should be designed in such a way in the known saw blade that the distance between the center of the sawtooth flank, which corresponds to the greatest tool width, and the plane of symmetry of the sawtooth is greater than the distance between the transition and the plane of symmetry .
  • the Chip thickness during the cutting process and tends towards zero in the outlet.
  • the cutting edge quickly only has a scraping and rubbing effect when it passes through the workpiece.
  • Scraping requires a much higher power requirement to drive the saw blade, which reduces the usability of this known circular saw blade on machine tools with a high drive power or on the cutting of very thin plates. It should also be noted that there are a large number of materials that contain highly abrasive particles. These abrasive particles have a particularly negative effect in the scraping phase with the well-known circular saw blade and round the cutting edges after a very short time, which means that the cutting tool quickly becomes unusable.
  • DE 297 07 665 U1 discloses a sawing tool for sawing wood and metals coated with plastic, the cutting surface, similar to the cutting tool according to DE 35 41 077 AI, to be produced by a pulling cut.
  • the known sawing tool is a so-called alternating tooth circular saw blade with teeth arranged one after the other in pairs and with pointed teeth on one side.
  • the second shape in each case has the mirror-image shape of the first tooth. Since only the longer cutting edge, i.e. every second cutting tooth, produces the cut surface quality in the case of the set tooth arrangement, a large number of cutting teeth can be ordered.
  • the present invention is based on the object of further developing the generic cutting tool in such a way that cutting and / or formatting of plate material with tear-free cut edges and smooth cut surfaces is possible with the lowest possible power requirement of the cutting tool. This object is achieved according to the invention with the features of patent claim 1.
  • the cutting edges located radially on the outside of the circumference of the tool in the pre-cutting area are arranged radially separated from the main cutting edges located further in the formatting area, the main cutting edges determining the cutting width.
  • a radial transition region is provided on the respective cutting tooth between the pre-cutting region and the formatting region, the transition cutting edges in the transition region following the cutting edges angled in the direction of a radial central axis of the tool profile.
  • the chip formation of the cutting edges is interrupted by the transition area located between the pre-cutting area and the formatting area.
  • the main cutting edges located radially further inside thus enter the workpiece with a time delay and produce a high-quality cutting surface and a tear-free cutting edge.
  • the separating blades in the pre-cutting area separate the workpiece surface and perform the separating cut.
  • the transition area of the cutting tooth also supports the guidance of the cutting blades.
  • transition cutting edges lie at such an angle to the central axis and to the cutting edges that the chip formation at the cutting edges is interrupted.
  • the transition cutting edges are expediently arranged approximately parallel to the central axis of the tooth profile.
  • the main cutting edges in the format area of the cutting tooth advantageously adjoin the transition cutting edges at an obtuse angle.
  • One has with regard to the Center axis symmetrical, polygonal profile of the cutting tooth in the pre-cutting area has proven to be advantageous.
  • FIG. 2 shows the profile of the cutting tooth according to FIG. 1 in a top view of the cutting tool
  • Fig. 5 shows a compact chipper
  • the support body 1 shows a circular saw blade 9, whose disk-shaped support body 1 can be driven to rotate about an axis of rotation 22 by a machine tool, not shown here.
  • the support body 1 is provided on its circumference with a plurality of cutting teeth 2, the tooth profile of which can be seen in the present illustration with the cutting edge formed thereon.
  • the cutting tooth 2 has a radially outer pre-cutting area 3, in which separating cutters 5, 5 'are formed, which first break through the workpiece surface during operation of the cutting tool and make the separating cut.
  • the cutting edges 5, 5 'are arranged trapezoidal and opposite a central axis 19 of the tooth profile employed, the cutting edges 5, 5 1 meeting at the level of the central axis 19 and forming a tooth tip. With the trapezoidal arrangement of the cutting edges 5, 5 ′ shown, the workpiece surface is severed at the beginning of the cutting process.
  • the pre-cutting area 3 is guided through the radially adjoining transition area 6, the cutting forces being kept low and no vibrations generated by transverse forces occurring which could damage the cutting edge.
  • the transition area 6 lies between the pre-cutting area 3 and the formatting area 4 of the cutting tooth 2, the axial length of the transition area determining the time delay of the entry of the main cutting edges 7, 7 'into the workpiece surface.
  • the course of the cutting edge of the cutting tooth is angled in the abutting region of the cutting edges 5, 5 ′ with the transition region 6, the transition cutting edges 20 being approximately parallel to the central axis 19 of the cutting tooth 2 in the present exemplary embodiment.
  • the transition cutting edges 20, 20 'can also lie at larger angles to the separating cutting edges 5, 5' and, for example, run radially inwards towards the central axis 19. According to the invention, the transition cutting edges are formed at such an angle to the central axis 19 and to the cutting edges 5, 5 'that the chip formation at the cutting edges 5, 5' is interrupted.
  • the transition area 6 is followed by the formatting area 4, to which the main cutting edges 7, 7 'belong, which determine the cutting width of the circular saw blade 9.
  • the main cutting edges 7, 7 * remove any edge damage that may be present after the previous processing by the separating cutting edges and smooth the cut surface.
  • the cutting tooth is mirror-symmetrical with respect to the central axis 19 of the tooth profile.
  • FIG. 2 shows a top view of the cutting tooth 2, the same reference numerals as in FIG. 1 being used for the sake of simplicity.
  • the axial distance between the cutting edges 5 'from the main cutting edges 7' is particularly evident as a result of the transition region with the transition cutting edges 6 '.
  • FIG. 3 shows an alternative embodiment of the cutting tooth 2 'according to the invention, in which the pre-cutting area 3' is formed with a separating cutting edge arranged in a so-called roof shape.
  • the cutting edge 5 * lies essentially parallel to the axis of rotation of the circular saw blade and is chamfered in its outer end regions adjacent to the transition region 6 '. In this way, a punching effect of the cutting edge 5 * is avoided.
  • the pre-cutting area 3 ' is followed by the transition area 6' with similar to that described in FIG. 1 transition edges which are essentially parallel to the central axis of the tooth profile.
  • the main cutting edges in the format area 4 ' also adjoin the transition cutting edges in the tooth profile according to FIG. 3 at an obtuse angle ⁇ .
  • each cutting tooth has a cutting edge with a quality-producing area.
  • Each tooth 2 is provided with a main cutting edge 7, 7 ', which ensures high surface qualities.
  • the cutting tool according to the invention produces a comparable cutting performance with significantly fewer cutting edges than conventional cutting tools with a group tooth arrangement.
  • FIG. 4 shows a formatting tool which comprises a cutting tool 9 similar to the illustration in FIG. 1, namely a circular saw blade.
  • a cutting tool 8 is arranged on the end face of the supporting body, which cuts the part of the panel to be machined that is separated from the saw blade 9 during operation of the tool.
  • the main cutting edge 7 is adjoined in the formatting area by a so-called jointed secondary cutting edge 18, which lies approximately parallel to the central axis of the tooth profile.
  • the jointed cutting edge 18 enables a significant increase in the runout accuracy of the tool.
  • FIG. 5 shows a compact chipper, which consists of a base body 10, on the end face of which a separating tool 11 is arranged.
  • broaching blades 12 of the chipper part are arranged in addition to the circumferential cutting edges 13 in the pre-cutting area 3 ′′ of the cutting tool.
  • the clearing blades 12 extend in the axial direction of the axis of rotation of the compact chipper.
  • the clearing blades 12 lie radially inward from the circumferential cutting edges 13 the cutting edges in the pre-cutting area 3 * on the circumference of the cutting tool.
  • Stuff 11 has only on the outside, that is, the side facing away from the chipper, the contour of the cutting edge according to the invention, as described for the circular saw blade according to FIGS. 1 to 3.
  • the area of the circumferential cutting edge 13 facing the base body 10 serves only to separate the workpiece, with no requirements being placed on the quality of the cut edges.
  • a cutting tooth contour is formed with a pre-cutting area 3 ", a transition area 14 and a main cutting edge 16.
  • a free cutting edge 21 is provided in the radial connection to the main cutting edge 16, which is angled in the tooth profile in the direction of the center Main cutting edge 16.
  • the main cutting edge 16 and the free cutting edge 21 abut one another in a cutting edge 17 which determines the working width of the tool and carries out the machining of the cutting edge surface 16.
  • the cutting edge 17 can, as shown for example in Fig. 4, be flattened and jointed Secondary sheaths 18. If, after the assembly of the tool on the drive shaft of the machine tool, it is determined that there are runout errors, this runout error is eliminated in that the runout of the formatting area 15 is ensured by junctioned shearbars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Milling Processes (AREA)
  • Sawing (AREA)

Abstract

L'invention concerne un outil de coupe permettant de couper et/ou de former des matières stratifiées en feuilles comme des plaques de plastique et équivalent. Cet outil comprend un support (1) pouvant être entraîné en rotation et dont le pourtour est pourvu de plusieurs dents de coupe (2). Ces dents de coupe (2) présentent une zone de dégrossissement (3) radialement éloignée et dotée de trancheuses à volume (5) et sont pourvues, dans une zone de formage (4), de tranchants principaux (7, 7') qui déterminent la largeur de coupe de l'outil (9). Pour obtenir une coupe et une forme avec des bords coupés sans déchirure et des faces de coupe lisses tout en disposant d'un outil de coupe ayant des besoins en énergie relativement faibles, l'invention prévoit de séparer radialement les tranchants principaux (7, 7') des tranchants à volume (5, 5') par une zone de transition (6) sur la dent de découpe (2). La formation de copeau est ainsi interrompue au niveau des tranchants à volume (5, 5').
EP99965425A 1998-12-01 1999-12-01 Outil de coupe et configuration de ses tranchants Withdrawn EP1051276A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19855364A DE19855364B4 (de) 1998-12-01 1998-12-01 Schneidenteil
DE19855364 1998-12-01
PCT/EP1999/009363 WO2000032341A1 (fr) 1998-12-01 1999-12-01 Outil de coupe et configuration de ses tranchants

Publications (1)

Publication Number Publication Date
EP1051276A1 true EP1051276A1 (fr) 2000-11-15

Family

ID=7889604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99965425A Withdrawn EP1051276A1 (fr) 1998-12-01 1999-12-01 Outil de coupe et configuration de ses tranchants

Country Status (4)

Country Link
US (1) US6505537B1 (fr)
EP (1) EP1051276A1 (fr)
DE (1) DE19855364B4 (fr)
WO (1) WO2000032341A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10063567A1 (de) * 2000-12-20 2002-07-04 Scintilla Ag Sägeblatt
US7036417B2 (en) * 2001-11-13 2006-05-02 William George Alton Bandsaw blade with cutting extensions
AU2007266253B2 (en) * 2006-06-01 2012-05-24 Rex Cameron Lucas A saw blade insert and method and means of sharpening same
EP1894687A1 (fr) * 2006-08-31 2008-03-05 Kock GmbH Zerspannungstechnik Dent de scie pour scie circulaire ou scie à ruban
DE102007017688A1 (de) * 2007-04-14 2008-10-16 Peter, Axel Kreissägeblatt
US9731365B2 (en) 2011-12-07 2017-08-15 Irwin Industrial Tool Company Saw blade with tooth form projection
ES2707066T3 (es) * 2013-06-24 2019-04-02 Kanefusa Knife & Saw Método para fabricar una sierra circular con puntas
US10537951B2 (en) 2017-08-16 2020-01-21 Black & Decker Inc. Band saw blade for cutting structural workpieces

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
US2671947A (en) * 1951-01-29 1954-03-16 Hammond Machinery Builders Inc Saw blade for cutting printing plates and other printing materials
US3169435A (en) * 1962-02-12 1965-02-16 Oliver Machinery Co Saw for ferrous materials
US3212724A (en) 1963-08-02 1965-10-19 George A Henderson Scrap disintegrator for circular saw
DE1811374B2 (de) * 1968-11-28 1973-05-30 Pahhtzsch, Gotthold, Prof Dr Ing e h , 3300 Braunschweig Schneidzahn fuer kreissaegeblaetter oder scheibenfoermige fraeser geringer dicke
US3818561A (en) * 1971-07-14 1974-06-25 Valeron Corp Cut-off saw and slotting cutter
GB1466453A (en) * 1973-05-28 1977-03-09 Metalcut Ab Centro Circular saw blade
DE2354481C2 (de) * 1973-10-31 1982-11-25 Ledermann Gmbh + Co, 7240 Horb Sägewerkzeug
US4012820A (en) * 1975-06-16 1977-03-22 The Motch & Merryweather Machinery Company Circular saw having teeth with an improved metal breaking geometry
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IT1083207B (it) * 1977-01-14 1985-05-21 Bruno Mario Lama per sega a macchina particolarmente per il taglio di metalli
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DE3541077A1 (de) * 1985-11-19 1987-05-21 Howema Gmbh Wittenborn & Edel Scheibenfoermiges werkzeug zum trennschneiden und formatbearbeiten
US4784033A (en) * 1986-01-22 1988-11-15 Milford Products Corporation Triple chip ground carbide tip bandsaw blade with ductile filler
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See references of WO0032341A1 *

Also Published As

Publication number Publication date
DE19855364B4 (de) 2007-11-22
WO2000032341B1 (fr) 2000-07-20
US6505537B1 (en) 2003-01-14
WO2000032341A1 (fr) 2000-06-08
DE19855364A1 (de) 2000-06-15

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