EP2422941A1 - Lame circulaire avec trou central sans coins mais non circulaire - Google Patents

Lame circulaire avec trou central sans coins mais non circulaire Download PDF

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Publication number
EP2422941A1
EP2422941A1 EP11178248A EP11178248A EP2422941A1 EP 2422941 A1 EP2422941 A1 EP 2422941A1 EP 11178248 A EP11178248 A EP 11178248A EP 11178248 A EP11178248 A EP 11178248A EP 2422941 A1 EP2422941 A1 EP 2422941A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
driver
recess
disc
central recess
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.)
Granted
Application number
EP11178248A
Other languages
German (de)
English (en)
Other versions
EP2422941B1 (fr
Inventor
Bernhard Teufel
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PL11178248T priority Critical patent/PL2422941T3/pl
Publication of EP2422941A1 publication Critical patent/EP2422941A1/fr
Application granted granted Critical
Publication of EP2422941B1 publication Critical patent/EP2422941B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
    • B26D1/1435—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2614—Means for mounting the cutting member
    • B26D7/2621—Means for mounting the cutting member for circular cutters

Definitions

  • Such cutting discs are known in many forms, the cutting discs, seen in plan view, differ essentially by their diameter, the shape of the central recess and the possible presence of further recesses.
  • the central recess As a circular recess.
  • the central recess can - depending on the configuration - be relatively small or relatively large.
  • a purely circular Mittenaus strictlyung does not allow a rotationally fixed connection to the drive shaft. Therefore, additional measures have been taken in the prior art cutting wheels to transfer the torque from the drive shaft to the cutter disk.
  • the number of further holes or recesses varies. In some cases, only a single such recess or hole is present. In other cases, the number of holes or recesses is two. Also more than two such Holes or recesses are known. Sometimes, up to six such recesses or holes are present.
  • central recess substantially circular, but, starting from the per se circular recess, at least one radially outwardly facing U-shaped recess is arranged.
  • the number of U-shaped recesses varies again. Minimal, a single such recess is present. There are also embodiments with more than one such U-shaped recess, for example with four such recesses.
  • the prior art knife discs are often made of cemented carbide or ceramic. Both carbide and ceramic are relatively brittle and brittle. In operation, therefore, it often happens that the blade breaks and must be replaced by a new blade.
  • the object of the present invention is to design a cutting disc of the type mentioned in such a way that the risk of breakage is reduced.
  • the center recess of a knife disc of the type mentioned as cornerless, but not circular Mittenausinstituung form, so that the blade disc is fixed in rotation on the drive shaft after plugging on the driver.
  • the contour of the central recess is a concavo-convex or plano-convex curve.
  • the contour of the central recess is a purely convex curve, for example an ellipse or an oval.
  • the central recess is not circular, a distance varies from the boundaries of the central recess opposite the axis of rotation.
  • the maximum distance of such limits is 70% to 80% of an outer diameter of the cutter disk.
  • a minimum distance of such boundaries is preferably 40% to 70% of the outer diameter.
  • the central recess is arranged centrically to the axis of rotation of the drive shaft.
  • the center recess in this case has a periodicity in the direction of rotation of the drive shaft.
  • the central recess is the only recess of the knife disc. This is in particular preferable to manufacture and also reduces the risk of breakage even further.
  • the knife disc can in principle consist of any material. Preferably, it consists of metal - in particular tool steel or carbide - and / or ceramic.
  • the present invention further relates to a drive shaft for a knife wheel of the type described above, wherein the drive shaft has a driver whose outer contour corresponds to the center recess of the cutter disk.
  • the present invention further relates to a driver for a drive shaft, wherein the driver has a central recess with which the driver can be plugged onto a drive shaft, wherein the driver has an outer contour which corresponds to the center recess of a cutter disk according to the invention.
  • the cutter disk 1 is usually relatively thin.
  • a thickness d of the cutter disk 1 is usually between 1 millimeter and 4 millimeters, often less than 2.5 millimeters.
  • the cutter disk 1 is generally circular on its outer circumference 3.
  • An outer diameter D of the cutter disk 1 is generally well above 10 cm, for example 20 cm to 35 cm.
  • the cutter disk 1 has on its outer circumference 3 a cutting edge 4 which rotates along the outer circumference 3.
  • the cutting edge 4 can - see FIG. 3 - Be designed as a V-shaped cutting edge 4.
  • the cutting edge 4 - see FIG. 4 - have a steep desk shape.
  • the knife disc 1 has a central recess 5. Due to the presence of the central recess 5, the knife disc 1 can be plugged onto a drive shaft 6. It is placed there on a driver 7 of the drive shaft 6. About the driver 7, the cutter disk 1 is rotatable about a rotation axis 8 of the drive shaft 6.
  • the central recess 5 is - see in particular FIG. 2 - Although designed as a "round”, ie cornerless center recess 5. But it is not designed as a circular Mittenausnaturalung 5. It is therefore fixed in rotation on the drive shaft 6 after plugging on the driver 7, even if it still has to be secured axially.
  • the center recess 5 can - see purely by way of example FIG. 5 - Be concave-convex.
  • the outer contour of the central recess 5 consists of 4 convex semicircles, which merge into each other via 4 concave quadrants.
  • the radii r of the semicircles are equal to each other.
  • the radii r 'of the quarter circles are equal to each other.
  • even radii of semicircles are equal to radii of quarter circles.
  • the - in the present case common - radius r, r 'of the half and quarter circles is preferably about 1/8 of the diameter D of the cutter disk. 1
  • the outer contour of the central recess 5 is formed as a plano-convex curve, ie as a curve consisting of straight sections, which merge into one another via convex sections.
  • FIG. 6 shows an example of such a possible embodiment.
  • the radius r "of the quadrants is preferably the same for all quadrants, for example, it may be about 1/8 of the outer diameter D of the cutter disk 1.
  • The" center points "9 of FIG Quarter circles may for example have a distance a from the axis of rotation 8, which is approximately equal to half of the outer diameter D of the cutter disk 1.
  • the center recess 5 - see FIG. 2 - a pure (ie everywhere) convex curve.
  • the central recess 5 as shown by FIG. 2 be designed as an ellipse.
  • an oval shape is possible.
  • FIG. 2 is the length of a long half-axis 10 of the ellipse, for example, about 3/8 of the outer diameter D of the cutter disk 1.
  • a length of a short half-axis 11 of the ellipse is in the embodiment of FIG. 2 at about 1/4 of the outer diameter D of the knife disc. 1
  • the size of the central recess 5 can be determined as needed. Preferably lies - see the Figures 2 . 5 and 6 - A maximum distance from the boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 70% to 80% of the outer diameter D of the knife disc 1. Further lies - see again the Figures 2 . 5 and 6 - A minimum distance from boundaries of the central recess 5, which are opposite to each other with respect to the axis of rotation 8, between 40% and 70% of the outer diameter D of the cutter disk. 1
  • the center recess 5 is preferably arranged centrally to the axis of rotation 8 of the drive shaft 6. Furthermore, the central recess 5 seen in the direction of rotation of the drive shaft 6 preferably has a periodicity. It is therefore possible to remove the cutter disk 1 from the driver 7, then to rotate it about 360 ° / n about the axis of rotation 8 and then put it back on the driver 7.
  • the value n has the value 2. In the embodiments of the Figures 5 and 6 For example, n has the value 4. However, depending on the design of the central recess 5, other values are also possible, for example 3, 5 and 6.
  • the central recess 5 is indeed cornerless, but not circular, is - a correspondingly corresponding configuration of the driver 7 provided already realized by attaching the blade disc 1 on the driver 7 a rotationally fixed fixation of the blade disc 1 on the drive shaft 6 , Further recesses for driving pins and the like are therefore not required. Rather, it is possible that the central recess 5 is the only recess of the knife disc.
  • the material of the blade disc 1 can be selected as needed.
  • the material of the cutting disc 1 may be a ceramic.
  • it may be, for example, a metal.
  • metals in particular tool steels and - particularly preferably - hard metals in question.
  • the driver 7 of the drive shaft 6 must, as already mentioned, have an outer contour which corresponds to the central recess 5 of the cutter disk 1. It is possible that the driver 7 is part of the drive shaft 6, with the drive shaft 6 is thus integrally connected. Alternatively, it may be at the driver 7 is an independent element which is detachably connected to the drive shaft 6. Such a driver 7 is in the FIGS. 7 and 8th shown. In this case, the driver 7 - in addition to its outer contour; this is formed as already described - in turn, also a central recess 12.
  • the center recess 12 of the driver 7 can in principle have any shape. It may - analogous to the central recess 5 of the blade disc 1, although without corners, but not circular.
  • the center recess 12 of the driver 7 may be circular.
  • the center recess 12 of the driver 7 is formed as a square MittenausEnglishung 12, for example as a square or hexagonal MittenausANSung 12, so that the driver 7 is already held against rotation by plugging onto the drive shaft 5, even if it still has to be fixed axially.
  • the present invention has many advantages. So it is particularly easy to implement. It may even be possible to rework a center recess of a prior art knife disk so that it is designed according to the invention after finishing. The risk of breakage of a cutting disc 1 according to the invention is considerably reduced compared with cutting discs of the prior art. Also, relatively little material is needed for the cutter disk 1 according to the invention. This is particularly important because, for example, carbide is relatively expensive.
EP11178248.8A 2010-08-23 2011-08-22 Lame circulaire avec trou central sans coins mais non circulaire Not-in-force EP2422941B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11178248T PL2422941T3 (pl) 2010-08-23 2011-08-22 Tarcza noża z niezawierającym narożników, ale nie okrągłym wycięciem środkowym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010037109A DE102010037109A1 (de) 2010-08-23 2010-08-23 Messerscheibe zum Zerschneiden eines Materials

Publications (2)

Publication Number Publication Date
EP2422941A1 true EP2422941A1 (fr) 2012-02-29
EP2422941B1 EP2422941B1 (fr) 2016-01-13

Family

ID=44720582

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11178248.8A Not-in-force EP2422941B1 (fr) 2010-08-23 2011-08-22 Lame circulaire avec trou central sans coins mais non circulaire

Country Status (3)

Country Link
EP (1) EP2422941B1 (fr)
DE (1) DE102010037109A1 (fr)
PL (1) PL2422941T3 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2050911A (en) * 1979-05-22 1981-01-14 Jagenberg Werke Ag Cutter assembly
US5303688A (en) * 1992-04-03 1994-04-19 Chiuminatta Edward R Mounting arbor for saw cutting blades
DE102004056642A1 (de) * 2004-11-24 2006-06-01 Ziaei, Masoud, Dr. Einstellbare Profilkonturen mit mehreren Exzentrizitäten für formschlüssige Welle-Nabe-Verbindungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2050911A (en) * 1979-05-22 1981-01-14 Jagenberg Werke Ag Cutter assembly
US5303688A (en) * 1992-04-03 1994-04-19 Chiuminatta Edward R Mounting arbor for saw cutting blades
DE102004056642A1 (de) * 2004-11-24 2006-06-01 Ziaei, Masoud, Dr. Einstellbare Profilkonturen mit mehreren Exzentrizitäten für formschlüssige Welle-Nabe-Verbindungen

Also Published As

Publication number Publication date
PL2422941T3 (pl) 2016-07-29
DE102010037109A1 (de) 2012-02-23
EP2422941B1 (fr) 2016-01-13

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