EP0715933A1 - Outil d'estampage - Google Patents

Outil d'estampage Download PDF

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Publication number
EP0715933A1
EP0715933A1 EP95117933A EP95117933A EP0715933A1 EP 0715933 A1 EP0715933 A1 EP 0715933A1 EP 95117933 A EP95117933 A EP 95117933A EP 95117933 A EP95117933 A EP 95117933A EP 0715933 A1 EP0715933 A1 EP 0715933A1
Authority
EP
European Patent Office
Prior art keywords
punching
cutting edge
cutting
rounded
knife
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
EP95117933A
Other languages
German (de)
English (en)
Other versions
EP0715933B1 (fr
Inventor
Wolfgang Prof. Dr. Grebe
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.)
Karl Marbach GmbH and Co KG
Original Assignee
Karl Marbach GmbH and Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6535200&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0715933(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Karl Marbach GmbH and Co KG filed Critical Karl Marbach GmbH and Co KG
Publication of EP0715933A1 publication Critical patent/EP0715933A1/fr
Application granted granted Critical
Publication of EP0715933B1 publication Critical patent/EP0715933B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B26D1/0006—Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0053—Cutting members therefor having a special cutting edge section or blade section
    • 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
    • B26D1/0006—Cutting members therefor
    • B26D2001/0086—Cutting members therefor having a radiussed blunt cutting edge
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B26F2001/4472—Cutting edge section features
    • 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
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching 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
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching tool
    • Y10T83/9428—Shear-type male 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
    • Y10T83/00—Cutting
    • Y10T83/929—Tool or tool with support
    • Y10T83/9454—Reciprocable type

Definitions

  • the invention relates to a punching knife for punching out parts of any shape from paper, cardboard, cardboard, plastic films, leather, rubber and the like.
  • Such punch knives e.g. are known from DE-PS 33 17 777 C1 are preferably used in strip steel punching tools for punching out parts of any shape from flat materials, in particular folding box blanks. They are also increasingly used in rotary punching tools for the same purposes.
  • the punching knives have to meet three requirements: 1. that the material must be reliable and completely separated over the entire punching area, so that no production disruptions occur in the subsequent work stages, 2. that the cut is perfectly dust and fiber free with smooth cut edges and 3. that the cutting edge wear should be as low as possible, which is expressed in the number of good punchings. These three requirements can only be met inadequately with the current cutting edges.
  • the cutting edges of the known punching knives are generally produced by grinding, scraping partly by lapping, based on the idea that the cutting edge should be as sharp as possible.
  • Cutting edges are clearly below 0.010 mm, but which have an uneven micro-saw-like contour and which, due to the manufacturing process, adhere to the smallest whiskers. These cutting edges must first level out in interaction with the material to be cut, smooth so that the best possible cutting quality can then be achieved. Depending on the material to be cut, several thousand punching strokes are required.
  • the production lines have height differences of +/- 0.02 mm. In addition, there are further height tolerances from the punching machines, tool manufacture and handling of the punching processes.
  • the procedure is to press the punch until at least 50% of all interfaces have been cut. Then the remaining height differences are compensated for by gluing with suitable tapes of different thicknesses.
  • the cutting edges can be coated to reduce wear and reduce friction.
  • Such coatings have a generally ceramic character with extremely high hardness, but are correspondingly brittle.
  • Our own investigations have shown that these wear-reducing layers are also destroyed by the cutting edge damage until they become ineffective.
  • a cutting knife for cutting a moving cardboard web is known from US Pat. No. 2,349,336, the cutting edge of which has a rounding with a radius of 0.05 to 0.1 mm and a cutting angle of 55 ° to 80 °. This shape of the cutting edge is intended to ensure that the cardboard web under tension is severed before the cutting edge has moved completely through the cardboard web. A punching stroke is not carried out with this cutting knife.
  • the invention has for its object to provide a punch knife whose cutting edge produces an optimal cut quality from the beginning.
  • This object is achieved by a punch knife that a cutting edge that has a radius with a radius of 0.005 to 0.060 mm.
  • the punching knife Due to the rounding of the cutting edge according to the invention, the punching knife produces an optimal cutting quality right from the start.
  • the punching knife can be subjected to high loads during dressing and punching without deforming plastically under the punching pressure when it hits the steel punching plate.
  • the preparation time is short.
  • a wear-reducing cutting edge coating can be provided to increase the service life.
  • the rounded cutting edge is preferably additionally hardened or surface-finished.
  • the cutting edge angle of the rounded cutting edge is 30 to 60 °.
  • the cutting edge meets the punching plate during the punching process. With this line contact, a mutual flattening takes place in the plane of contact, which can be estimated using Hertz's equations and thus the resulting stresses in the cutting edge.
  • the punching knife is subject to a swelling continuous pressure load and has a limit load capacity of approx. 1160 N / mm2 for a typical steel strip, eg Ck 55.
  • Ideal cutting conditions for example with a folding boxboard of 300 g / m2, stress the steel in the cutting edge with a cutting edge radius of 0.010 mm with only approx. 350 N / mm2.
  • This value is higher for commercially available cutting edges, since there is neither a defined radius nor a sufficiently precise, uniform cutting edge width of 0.010 mm.
  • the cutting load on the steel decreases and is, for example with a cutting edge radius of 0.030 mm arithmetically approx. 180 N / mm2.
  • the calculation further shows that a rounding of the cutting edge with 0.010 mm by punching can withstand an overload until the critical tension of 1160 N / mm2 of approx. 100 N / cm punching line length is reached, a cutting radius of 0.030 mm is approx. 330 N / cm.
  • the cutting edge widens to at least 0.015 mm and with an overload of 0.200 mm, the cutting edge becomes 0.050 to 0.060 mm wide and is flattened unevenly over the cutting length, i.e. not rounded. The cut quality is severely affected.
  • a rounded cutting edge according to the invention with a radius of 0.030 mm shows no cutting edge change under the same conditions and produces flawless cutting edges in the material to be cut. Extensive tests show that the cut quality e.g. on cardboard boxes with undamaged cutting tips up to 0.040 mm edge radii perfect and indistinguishable from edge radii 0.010 mm.
  • the punch knife 1 shown in the figure essentially corresponds to a punch knife as shown for example in DE 39 28 916 C1.
  • a number of such punching knives are usually attached together with creasing lines to the underside of a carrier plate of a punching tool of a punching machine.
  • the punching knives are used, for example, for punching out folding boxes from one lying on a counter-punching plate Carton.
  • the carrier plate is pressurized and moved in the direction of the counter-punching plate until the punching knives touch the counter-punching plate and the cardboard is severed. The carrier plate is then moved away from the counter-punching plate.
  • the punch knife 1 is elongated and has a symmetrical cutting edge 2 running in its longitudinal direction at its end facing the counter-punching plate (not shown).
  • the cutting edge 2 has two inclined flanks 5, 6 which run symmetrically to the longitudinal center plane 10 of the punch knife 1, which run at an angle of preferably 30 to 60 ° to one another and merge into the side flanks 7, 8 of the punch knife 1.
  • the inclined flanks 5, 6 merge into a rounding 9 connecting them, which is also symmetrical to the longitudinal center plane 10 of the punch knife 1.
  • the fillet 9 has a radius of 0.005 to 0.04 mm.
  • the rounded cutting edge 2 can additionally be hardened or surface-finished.
  • the rounded punch knives with the increased surface area reduce the fact that the cutting edge does not dig into the punch plate so deeply during punching, so that the impression is not so large. This is gentle on sensitive surfaces to be cut.
  • the reduced impression due to the increased contact area between the cutting edge and the stamping plate reduces the notch stresses in the area of the burial and thus the premature occurrence of fatigue fractures in the stamping plate.
  • the punch knives lose height in connection with wear. A compromise can therefore be made between increased resilience of the cutting edge and wear.
  • a cutting radius of 0.020 mm is considered to be particularly favorable for this.
  • the rounding of the cutting edge can be created mechanically, e.g. by remelting by means of lasers with appropriate heat management on normal and cutting-hardened punching knives, which are produced as steel strip lines or from fully machined punching lines as flat flat tools or as curved ones for rotary tools.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Making Paper Articles (AREA)
  • Heat Treatment Of Articles (AREA)
EP95117933A 1994-12-07 1995-11-14 Outil d'estampage Expired - Lifetime EP0715933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443613A DE4443613C1 (de) 1994-12-07 1994-12-07 Stanzmesser mit verrundeter Schneide
DE4443613 1994-12-07

Publications (2)

Publication Number Publication Date
EP0715933A1 true EP0715933A1 (fr) 1996-06-12
EP0715933B1 EP0715933B1 (fr) 1999-06-16

Family

ID=6535200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117933A Expired - Lifetime EP0715933B1 (fr) 1994-12-07 1995-11-14 Outil d'estampage

Country Status (7)

Country Link
US (1) US5967015A (fr)
EP (1) EP0715933B1 (fr)
JP (1) JPH08216098A (fr)
CN (1) CN1129631A (fr)
AT (1) ATE181274T1 (fr)
CZ (1) CZ322095A3 (fr)
DE (2) DE4443613C1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110685A1 (fr) * 1999-12-20 2001-06-27 Essmann + Schaefer Gmbh + Co.KG Outil pour effectuer une coupe ou un rainurage
US7909902B2 (en) 2008-06-12 2011-03-22 International Business Machines Corporation Modified hexagonal perforated pattern

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29809958U1 (de) 1998-06-04 1998-08-27 Essmann + Schaefer GmbH + Co. KG, 42369 Wuppertal Schneid- und Ritzwerkzeug
JP2007075938A (ja) * 2005-09-13 2007-03-29 Carl Manufacturing Co Ltd パンチ刃
JP4826227B2 (ja) * 2005-11-21 2011-11-30 三菱マテリアル株式会社 ロータリーダイ
JP4831318B2 (ja) * 2006-02-27 2011-12-07 大日本印刷株式会社 シート打抜型設計方法
SE530194C2 (sv) * 2006-07-10 2008-03-25 Sandvik Intellectual Property En egg hos ett knivorgan för en knivvals
AT508551B1 (de) * 2010-01-26 2011-02-15 Boehler Uddeholm Prec Strip Gmbh Stanzwerkzeug
SE534677C2 (sv) * 2010-03-23 2011-11-15 Sandvik Intellectual Property Stålstanskniv
DE102011014858A1 (de) 2010-04-20 2011-10-20 Heidelberger Druckmaschinen Ag Stanzstation mit Zurichtvorrichtung
US9102818B2 (en) 2010-05-17 2015-08-11 Highcon Systems Ltd. Method and system for surface adhesive rule technology
US8777828B2 (en) 2010-05-17 2014-07-15 Highcon Systems Ltd. Method and system for creating co-layer surface adhesive rule
DE102010061991B4 (de) * 2010-11-25 2016-06-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Stanzen einer aus Fasermaterial bestehenden Fasermatte
JP5146591B1 (ja) * 2011-12-22 2013-02-20 横浜ゴム株式会社 空気入りタイヤの製造方法
WO2014050884A1 (fr) * 2012-09-28 2014-04-03 株式会社アライドマテリアル Lame coupante du type lame plate et lame coupante pour feuille crue
WO2016121683A1 (fr) * 2015-01-26 2016-08-04 リケンテクノス株式会社 Procédé de fabrication d'un panneau résineux
JP6495959B2 (ja) * 2017-02-14 2019-04-03 株式会社東北田村工機 打抜き刃
CN109702781A (zh) * 2018-08-29 2019-05-03 深圳市宝明科技股份有限公司 一种导光板冲切刀具及冲切方法
KR102030057B1 (ko) * 2019-08-13 2019-10-08 이준범 칼날을 오래 사용하고 음식물이 달라붙지 않는 칼
FR3100475B1 (fr) * 2019-09-06 2021-08-06 Safran Nacelles Procédé et machine de découpe d’éléments de drapage
EP3835018A1 (fr) * 2019-12-12 2021-06-16 Ceratizit Luxembourg Sàrl Élément de coupe et son utilisation
DE102020120576A1 (de) * 2020-08-04 2022-02-10 Hauni Maschinenbau Gmbh Hartmetallmesser für Strangschnitt und Messerhalter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2349336A (en) 1940-04-23 1944-05-23 Fred Goat Co Inc Cutting blade and method of cutting therewith
US2361288A (en) * 1944-04-17 1944-10-24 Simonds Saw & Steel Co Cutting rule
DE3135980C1 (de) 1981-09-11 1983-06-01 Karl Marbach Gmbh & Co, 7100 Heilbronn Bandstahlstanzwerkzeug mit mindestens einem eine Schneide aufweisenden bandförmigen Stanzmesser
DE3317777C1 (de) 1983-05-16 1984-09-13 R + S Stanzformen GmbH, 6000 Frankfurt Bandstahlstanzwerkzeug fuer Zuschnitte aus Karton od.dgl.
EP0327530A2 (fr) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Couteau à ruban pour façonner des feuilles
DE3928916C1 (fr) 1989-08-31 1991-01-24 Karl Marbach Gmbh & Co, 7100 Heilbronn, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE790308A (fr) * 1971-10-22 1973-02-15 Boehler & Co Ag Geb Lampe d'etampe a tranchant dentele
US4526077A (en) * 1983-07-21 1985-07-02 Detroit Punch & Retainer Corporation Heavy duty punch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2349336A (en) 1940-04-23 1944-05-23 Fred Goat Co Inc Cutting blade and method of cutting therewith
US2361288A (en) * 1944-04-17 1944-10-24 Simonds Saw & Steel Co Cutting rule
DE3135980C1 (de) 1981-09-11 1983-06-01 Karl Marbach Gmbh & Co, 7100 Heilbronn Bandstahlstanzwerkzeug mit mindestens einem eine Schneide aufweisenden bandförmigen Stanzmesser
DE3317777C1 (de) 1983-05-16 1984-09-13 R + S Stanzformen GmbH, 6000 Frankfurt Bandstahlstanzwerkzeug fuer Zuschnitte aus Karton od.dgl.
EP0327530A2 (fr) * 1988-02-03 1989-08-09 BÖHLER Gesellschaft m.b.H. Couteau à ruban pour façonner des feuilles
DE3928916C1 (fr) 1989-08-31 1991-01-24 Karl Marbach Gmbh & Co, 7100 Heilbronn, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1110685A1 (fr) * 1999-12-20 2001-06-27 Essmann + Schaefer Gmbh + Co.KG Outil pour effectuer une coupe ou un rainurage
US7909902B2 (en) 2008-06-12 2011-03-22 International Business Machines Corporation Modified hexagonal perforated pattern

Also Published As

Publication number Publication date
JPH08216098A (ja) 1996-08-27
CN1129631A (zh) 1996-08-28
CZ322095A3 (en) 1996-06-12
DE4443613C1 (de) 1996-04-25
DE59506228D1 (de) 1999-07-22
US5967015A (en) 1999-10-19
EP0715933B1 (fr) 1999-06-16
ATE181274T1 (de) 1999-07-15

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