EP3168016B1 - Outil de coupe destine a separer des materiaux plats - Google Patents

Outil de coupe destine a separer des materiaux plats Download PDF

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Publication number
EP3168016B1
EP3168016B1 EP16186554.8A EP16186554A EP3168016B1 EP 3168016 B1 EP3168016 B1 EP 3168016B1 EP 16186554 A EP16186554 A EP 16186554A EP 3168016 B1 EP3168016 B1 EP 3168016B1
Authority
EP
European Patent Office
Prior art keywords
cutting
teeth
cutting tool
tips
flanks
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.)
Active
Application number
EP16186554.8A
Other languages
German (de)
English (en)
Other versions
EP3168016A1 (fr
Inventor
Anton Haas
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.)
Voestalpine Precision Strip GmbH
Original Assignee
Voestalpine Precision Strip GmbH
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 Voestalpine Precision Strip GmbH filed Critical Voestalpine Precision Strip GmbH
Publication of EP3168016A1 publication Critical patent/EP3168016A1/fr
Application granted granted Critical
Publication of EP3168016B1 publication Critical patent/EP3168016B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B23D61/12—Straight saw blades; Strap saw blades
    • B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
    • 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
    • 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
    • B26D2001/0013—Cutting members therefor consisting of a reciprocating or endless band
    • 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
    • B26D2001/002—Materials or surface treatments therefor, e.g. composite materials
    • 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
    • B26D2001/006—Cutting members therefor the cutting blade having a special shape, e.g. a special outline, serrations
    • 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
    • B26F2001/4436—Materials or surface treatments therefore
    • 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
    • B26F2001/4463—Methods and devices for rule setting, fixation, preparing cutting dies
    • 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
    • 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
    • B26F2001/4481—Cutters therefor; Dies therefor having special lateral or edge outlines or special surface shapes, e.g. apertures

Definitions

  • the invention relates to a cutting tool made of hardenable steel for cutting flat materials, for example cardboard, corrugated cardboard, honeycomb cardboard, plastic sheets and the like, consisting of a band-shaped base body, which in the longitudinal direction on the one hand has a working area with cutting teeth and on the other hand a support area with a support surface, optionally with a plurality of support surfaces.
  • Flat materials made of flexible materials with high local loads represent a suitable packaging means for the delivery of goods to customers or companies.
  • Selected packaging materials such as cardboard, corrugated cardboard, honeycomb cardboard, plastic sheeting and the like usually ensure the undamaged transport of even brittle, bulky goods.
  • the mostly foldable shapes of the raw packaging parts are punched out of webs or surfaces from the respective flat material, which raw packaging parts can easily be shaped into containers.
  • Cutting tools which are also called cutting lines or punching lines in technical jargon, consistently have a band-shaped base body and in its longitudinal direction have on the one hand a cutting work area and on the other hand a support area.
  • the working area or the cutting edge is usually designed with teeth in order to allow the cutting tool to easily penetrate through the material to be punched of desired undeformed cut surfaces.
  • Embodiments of the cutting edge of the tool with teeth which can also have hardened cutting edges, are known and are used with advantage.
  • the U.S. 3,203,295 discloses in a clear view a sine-cosine curve of the teeth or the cutting edges of the teeth of the cutting line with a rounded convex vertex and a uniformly shaped base point area.
  • the document EP 2 594 496 relates to a packaging apparatus with a cutting tool with at least one blade which has a plurality of first teeth and a plurality of second teeth, the first teeth being longer than the second teeth, with the characterizing features that the packaging apparatus has a film dispenser for dispensing a film comprising a thickness of less than about 30 ⁇ m and / or a Young's Modulus of less than 100,000 MPa, the packaging apparatus being configured so that the cutting tool cuts the film and a sealing tool is configured to wrap the film to seal to a tray and wherein the cutting tool forms a substantially closed shape.
  • a rotary cutting line with a cutting edge and two side surfaces is disclosed in US Pat WO 2008/068015 wherein the cutting edge has secondary facets or side surfaces and the transition between secondary facets or side surfaces and flanks of the cutting teeth is formed by polishing.
  • the EP 0 564 392 on a separation or. Punch knife with teeth for cutting through non-metallic parts, in particular made of plastic, the cutting contour provided with the teeth having additional wave crests and wave troughs.
  • the tooth tips In the case of new types of flat materials with certain mechanical property profiles such as improved shock absorption, higher buckling stability and the like, as well as the increased use of recycling materials in the production of the same, the tooth tips usually deform the surface layer during the cutting process before penetrating into the Flat material. Local indentations and deformations due to a hard and / or flexible surface of flat materials usually cause a rough, uneven cut surface.
  • Such uneven cut surfaces of a punched packaging blank can be detrimental to the appearance of a packaging and impede the machine molding of goods into the packaging.
  • the aim of the invention is to overcome the disadvantages of the previous cutting knives and to create a cutting tool of the type mentioned above, which avoids the formation of deformed cutting areas when cutting flat material by punching and creates flat cut surfaces over the cross section.
  • a further aim of the invention is to minimize the depth of penetration of the tips of the cutting tool into the yielding support of the flat material.
  • the cutting teeth are formed with tips with radii of up to 2.0 mm and, starting from these, with cutting flanks at an angle ⁇ of 60 ° to 90 ° to one another, with cutting teeth that are adjacent in the longitudinal direction of the cutting tool having a different distance between the cutting tips opposite support surface, optionally from the opposite support surfaces.
  • a design according to the invention of the working area of a cutting tool is such that the most protruding tips of the cutting teeth are at a large distance from each other at a given distance from the opposite support surface, whereby a local pressure load on the surface of the flat material is distant at the beginning of a cut.
  • the local resistance of the flat material to pressure deformation in the area of the tooth tips is high, which results in easier penetration of the tooth tips and a separation progress by means of the sharp-edged cutting edges of the tool with a low load on the surface area of the flat material.
  • Adjacent tooth tips which are less spaced from the opposite support surface, are also spaced in the longitudinal direction of the tool, which favors penetration of the tooth tips into the surface of the flat material due to high local resistance without permanent deformation.
  • a different distance from an opposite support surface of adjacent cutting teeth of a cutting tool according to the invention is essential and a respective radius of the tooth tips of less than 2 mm and an angle ⁇ of 60 ° to 90 ° of the cutting flanks to each other are significant with regard to a desired flat cut surface formation in a Punching a packaging blank from a flat material.
  • three adjacent cutting tooth tips can also be provided, each with a different spacing from the opposing support surfaces, which results in additional advantages with regard to cutting and forming the same.
  • the further objective of reducing the depth of penetration of the most distant projecting tooth tips of the tool into the base of the sheet material during the cut is achieved by the inventive embodiment of the working area of a cutting tool also by a different distance between adjacent cutting tooth tips and the opposite support surface.
  • the cutting teeth have tips with a radius of 1 mm or less, but of at least 0.1 mm, penetration of the same into the surface of the flat material can be facilitated in a favorable manner and wear of the tooth tips during the punching operation can be kept low.
  • the difference in the distances between the cutting tips of adjacent cutting teeth and the opposite support surface (s) is advantageously 0.5 to 2.0 mm, because this allows developments in the field of properties of flat materials to be taken into account.
  • the cutting flanks have a cutting edge angle ⁇ of 40 ° to 55 ° in cross section, an optimum can be achieved with regard to a low cutting pressure when separating flat material and with regard to low cutting edge wear.
  • Cutting edge wear can be further reduced if the cutting flank areas have a hardness of greater than 360 HB or 380 HV up to a depth of 0.5 mm.
  • the working area with the cutting teeth can advantageously have a wear-resistant and / or a friction-reducing surface layer.
  • Fig. 1 shows schematically an essentially known cutting tool S for cutting flat materials.
  • a band-shaped base body has a working area 1 with teeth 11, with cutting flanks 112 extending from the tooth tips 111 which enclose an angle ⁇ to one another.
  • a support area 2 of the base body has a support surface 22, from which the tips 111 of the cutting teeth 11 are at the same distance A.
  • a given tooth shape with a certain distance between the teeth 11 in the longitudinal direction results in a maximum tooth length B between the tooth tips 111 and the tooth base.
  • the tips 111 of the teeth 11 of the tool S penetrate at least a distance of the dimension B into a flexible, yielding support of the flat material.
  • FIG. 2 an embodiment of a cutting tool S according to the invention is shown in principle.
  • a cutting area 1 of the band-shaped base body has adjacent teeth 11 'with tooth tips 111' in the longitudinal direction between the most protruding and spaced apart teeth 11, i.e. in the area where the cutting flanks 112 meet. on, which have a smaller distance A 'from the support surface 22 and are thereby set back.
  • the protruding tooth tips 111 When the cutting tool S is lowered onto the flat material or in the event of a similar relative movement, the protruding tooth tips 111, which have a large distance, first penetrate the flat material, after which a cutting position through the cutting flanks 112 with a low load on the flat material up to a contact with the adjacent recessed cutting tips 111 'The cutting teeth 11' takes place.
  • the tips 111 'of the cutting teeth 11' which are at a small distance from the support surface 21, 21 ', are, however, also at a great distance from one another, penetrate the flat material without permanent deformation and complete the separation of the same by means of the cutting flanks 112'.
  • the cutting knife S By means of the cutting knife S according to the invention, not only can a flat cut of the flat material be achieved, but the extent to which the tooth tips 111 of the cutting tool S penetrate the base of a flat material is reduced to a level B, which increases the durability of the base in the punching operation.
  • the dimension B results from the greatest distance between the maximally protruding tooth tips 111 above the tooth base.
  • Cutting tools according to the invention have considerable advantages, particularly in rotary punching, including smooth machine running and reduced bending stress of the teeth, high dimensional accuracy of the blanks and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (6)

  1. Outil de coupe (S) en acier trempé pour la séparation de matériaux plats positionnés sur un support flexible, par exemple du carton, du carton ondulé, du carton alvéolaire, des plaques en plastique et similaires, constitué d'un corps de base en forme de bande qui, dans le sens longitudinal, présente d'une part une zone de travail (1) avec des dents de coupe (11) et d'autre part une zone d'appui (2), avec une surface d'appui (22), éventuellement avec une pluralité de surfaces d'appui (22, 22'), caractérisé en ce que l'outil de coupe (S) coopère avec le support flexible et lâche du matériau de surface lors de la coupe de celui-ci et les dents de coupe (11) sont pourvues de pointes (111) ayant des rayons d'au moins 0,1 mm à 2,0 mm et, à partir de celles-ci, sont formées avec des flancs de coupe (112, 112', 112") formant entre eux un angle α de 60° à 90°, la différence entre les distances (A, A', A") des pointes de coupe (111, 111', 111") des dents de coupe adjacentes (11, 11', 11") par rapport à la surface d'appui opposée (22), éventuellement par rapport aux surfaces d'appui opposées (22, 22'), étant de 0,5 à 2,0 mm dans le sens longitudinal de l'outil de coupe (S).
  2. Outil de coupe selon la revendication 1, caractérisé en ce que les dents de coupe (11, 11', 11") ont des pointes (111, 111', 111") d'un rayon de 1 mm ou moins, mais d'au moins 0,1 mm.
  3. Outil de coupe selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que les flancs de coupe (112, 112', 112") des dents ont chacun un angle α égal de 65° à 75° les uns par rapport aux autres.
  4. Outil de coupe selon la revendication 1 ou 3, caractérisé en ce que les flancs de coupe (112, 112', 112") ont un angle de coupe β de 40° à 55° dans leur section transversale.
  5. Outil de coupe selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les zones des flancs de coupe présentent une dureté supérieure à 360 HB ou 380 HV jusqu'à une profondeur de 0,5 mm.
  6. Outil de coupe selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la zone de travail (1) avec les dents de coupe (11, 11', 11") porte une couche de surface résistante à l'usure et/ou réduisant le frottement.
EP16186554.8A 2015-10-14 2016-08-31 Outil de coupe destine a separer des materiaux plats Active EP3168016B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50873/2015A AT517762A1 (de) 2015-10-14 2015-10-14 Schneidwerkzeug zum Trennen von Flachmaterialien

Publications (2)

Publication Number Publication Date
EP3168016A1 EP3168016A1 (fr) 2017-05-17
EP3168016B1 true EP3168016B1 (fr) 2020-08-19

Family

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Family Applications (1)

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EP16186554.8A Active EP3168016B1 (fr) 2015-10-14 2016-08-31 Outil de coupe destine a separer des materiaux plats

Country Status (3)

Country Link
US (1) US20170106459A1 (fr)
EP (1) EP3168016B1 (fr)
AT (1) AT517762A1 (fr)

Families Citing this family (4)

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SE542356C2 (en) 2017-04-21 2020-04-14 Husqvarna Ab Cutting blade and method for producing a cutting blade
US20200254571A1 (en) * 2018-04-13 2020-08-13 Georgia-Pacific Corrugated Llc Curved panel and method of forming the same
CN109573207A (zh) * 2018-12-29 2019-04-05 天津兴雅医疗设备科技有限公司 一种药品包装设备的扎剪机构刀片
CN114713921B (zh) * 2021-01-05 2023-07-18 中国航发商用航空发动机有限责任公司 去支撑工装以及去支撑方法

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Also Published As

Publication number Publication date
AT517762A1 (de) 2017-04-15
EP3168016A1 (fr) 2017-05-17
US20170106459A1 (en) 2017-04-20

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