EP2262627B1 - Lames de coupe pour couper des matériaux plats - Google Patents

Lames de coupe pour couper des matériaux plats Download PDF

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Publication number
EP2262627B1
EP2262627B1 EP08758860.4A EP08758860A EP2262627B1 EP 2262627 B1 EP2262627 B1 EP 2262627B1 EP 08758860 A EP08758860 A EP 08758860A EP 2262627 B1 EP2262627 B1 EP 2262627B1
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EP
European Patent Office
Prior art keywords
cutting line
cutting
protrusions
line according
steel band
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
EP08758860.4A
Other languages
German (de)
English (en)
Other versions
EP2262627A1 (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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39952277&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2262627(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Voestalpine Precision Strip GmbH filed Critical Voestalpine Precision Strip GmbH
Priority to PL08758860T priority Critical patent/PL2262627T3/pl
Publication of EP2262627A1 publication Critical patent/EP2262627A1/fr
Application granted granted Critical
Publication of EP2262627B1 publication Critical patent/EP2262627B1/fr
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Classifications

    • 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
    • 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
    • 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
    • Y10T83/9295—Work supported tool [e.g., clicker die]

Definitions

  • the present invention relates to cutting lines for cutting according to the preamble of claim 1.
  • Such a cutting line is made DE 31 35 980 C known.
  • Cutting lines are known in the art and consist of a steel strip with a cutting edge, two parallel side surfaces and a ridge opposite the cutting edge. Cutting lines are bent according to the desired shape of a blank, cut to length and inserted into a carrier plate.
  • the resulting punching tool is u.a. used in flat bed punching, for example, to punch out cardboard boxes.
  • a flatbed punching machine comprises a flat upper plate to which the tool is attached, and a flat lower plate with which the workpiece is pressed against the punching tool.
  • the punching tool consists of a slotted support plate, usually made of a wood material, wherein the pre-bent cutting lines are inserted into the slots.
  • the slots in the carrier plate are usually continuous, so that the back of the cutting lines is present on the upper plate of the flatbed punching machine.
  • the cutting lines In order to obtain a uniform punching result, the cutting lines must be adjusted in height. First, a trial stamping is performed and observed at which points the workpiece is cut properly and where no complete cut is made. At these points, intermediate layers of paper or special metal or plastic bands between a back plate and the upper plate of the flat bed punching machine inserted locally to increase the pressure on the cutting lines. This process is called trimming.
  • This trimming may extend to larger areas (the so-called “zone dressing”) or to only certain localities where insufficient punching occurs (the so-called “local trimming”). It takes place on a dressing sheet, a layer of material which lies between a back plate behind the cutting lines and a protective plate of the upper plate of the flatbed punching machine. On the dressing sheet, for example, smaller or larger pieces of the intermediate layers are then fixed by hand at specific locations. In between, test cuts are made to evaluate the effects of dressing. Dressing is therefore a time-consuming, iterative process that requires a lot of experience and can not be used productively in flatbed die cutting machines.
  • the protrusions were created by milling or grinding recesses in the transverse direction of the steel strip in the back. This milling or grinding is preferably carried out after machining the cross-sectional shape of the creasing and cutting line.
  • a cutting line comprising a steel strip with a cutting edge of a back of the steel strip opposite the cutting edge, the back Having projections which are plastically deformable at the first use of the cutting line; and the projections were produced by milling or grinding recesses in the transverse direction of the steel strip in the back.
  • the protrusions substantially have a height h of 0.5% -70% and more preferably of substantially 2% -20% and more preferably of 6% -10% of the thickness D of the steel strip.
  • a cutting line comprising a steel strip with a cutting edge of the cutting edge opposite back of the steel strip, the back is randentkohlt to plastically deform at the first use of the cutting line can.
  • the plastic deformability of the back of a cutting line, which is desired for an automatic dressing, according to the invention can also be ensured by the fact that the back is randentkohlt. This can be done both in conventional back shapes, as well as in spine shapes with protrusions and recesses according to the other aspects of this invention, whereby the respective effects, in particular the plastic deformability of the back, can increase.
  • edge decarburization carbon is removed from the steel in the area of the back by diffusion, creating a soft, ferritic structure in the area of the back, which can easily be plastically deformed. Processually, such a decarburization can be achieved by the edge of the Cutting line is exposed under elevated temperatures of a reducing inert gas atmosphere.
  • the back region deforms plastically during the initial loading of a tool with such cutting lines by the occurring local compressive stresses, whereby an automatic dressing takes place.
  • the same compressive stress prevails on every section of the cutting line, whereby manual finishing can be saved or only very little manual trimming has to be carried out.
  • the back of the cutting line is edge-decarburized to a depth of 5 ⁇ m-100 ⁇ m.
  • the back is rounded in a cross section through a tip of the projections.
  • this back shape which is additionally rounded in the transverse direction, there is a line or point bearing surface of the back on the back plate of the tool, whereby the plastic deformation of the projections is further facilitated.
  • the insertion of the cutting lines is facilitated in the grooves of the carrier tape.
  • such a cross-sectional shape further reduces the effect of so-called back buckling in tight bending radii. When bending narrow radii would usually result in an increase in the total height H of the cutting lines in the range of up to 0.2 mm, depending on the thickness of the cutting lines and bending radius, which is inventively avoided.
  • the back is chamfered on both sides in a cross section through a tip of the projections or double-concave.
  • These spinal forms also facilitate a well-defined degree of plastic deformation with sufficient stability of the back.
  • the back is rounded in a cross section through a tip of the projections semicircular, wherein the radius of curvature r corresponds to half the thickness D of the steel strip.
  • This embodiment is particularly advantageous in terms of back upsetting while providing a sufficiently high stability of the back of the scoring and cutting line in the transverse direction. It results from the rounded back in the transverse direction a quasi-central force on the creasing or cutting lines, whereby lateral forces are avoided. A tilting of the creasing and cutting line in the groove of the carrier plate is therefore effectively prevented.
  • the projections in a longitudinal section through a tip of the projections on concave flanks More preferably, the back in longitudinal section on circular segment-shaped, in particular semicircular, recesses with a radius. Due to the concave, in particular round flanks of the projections - seen in the longitudinal direction of the creasing and cutting line - the projections have a progressive characteristic with respect to compressive forces introduced above. This is particularly advantageous in order to ensure a plastic and not only an elastic deformation of the projections both in small height differences to be compensated and in large differences in height.
  • the radius of the recesses corresponds to 10% - 250%, more preferably 20% - 150% and even more preferably substantially 100% of the thickness of the steel strip.
  • the projections in a longitudinal section through a tip of the projections on a tapered tip.
  • the radius of the flanks and the distance of the projections from one another are selected such that a pointed tip of the projections results. This results in a point-like contact between the projections and the protective plate of the tool before the first load, which becomes a flat contact after the load.
  • the projections in a longitudinal section through a tip of the projections on a tapered tip.
  • the radius of the flanks and the distance of the projections from each other is selected so that there is a butting tip of the projections. This results in a line-shaped contact between the projections and the protective plate of the tool before the first load, which becomes a flat contact after the load.
  • the tapered tip has a length 1 of 1% -50%, more preferably 5% -30% and even more preferably 20% of the thickness D of the steel strip.
  • the back has been tempered and / or annealed and / or edge deburred to increase its plastic deformability.
  • tempering or by partial annealing or edge decarburization plastic deformation of the back is increased and thus spared by the lower pressure forces during automatic trimming the cutting edge.
  • FIG. 1 shows a first embodiment of a cutting line according to the invention 1.
  • the cutting line 1 consists essentially of a flat steel strip 10 with a height H in the range of about 8 to 100 mm, a thickness D in the range of 0.45 to 2.13 mm (1 , 3 - 6 pt), any length and a cutting edge 20.
  • Special shapes of the cutting lines, as mentioned above, have other edge shapes 20 and are also the subject of the present invention.
  • the cutting edge 20 Opposite the cutting edge 20 is the back 30 of the steel strip 10 and the cutting line 1, which is rounded in this preferred embodiment.
  • the back 30 is rounded in a semicircle and has a radius of curvature r, which corresponds to substantially half the thickness D of the steel strip 10.
  • FIG. 2 is a cross section through the region of the back 30 shown in detail.
  • the semicircular rounding of the back region 30 is shown particularly well in cross section.
  • the rounding of the back portion 30 is generated similar to the facets of the cutting portion 20 by grinding or scraping the steel strip 10.
  • FIG. 3 shows the back region of the steel strip in the side view. It can be seen that the back has projections 32, which are produced by recesses 36 being ground in the back.
  • the back in the longitudinal section semicircular recesses 36 which have a radius R 1 .
  • the radius R 1 may be in one embodiment in the range of half the thickness D of the steel strip 10.
  • the back 30 in cross section on both sides-bevelled or double-concave.
  • the distance between the recesses 36 has been selected such that a blunt tip 34 of the projections 32 results, which thus have a length of 1.
  • the length is preferably 11% to 20% of the thickness D of the steel strip 10 and in one embodiment 0.05 to 0.15 mm, preferably 0.08 mm to 0.13 mm and particularly preferably 0.11 mm.
  • the height h is about 0.35 mm and thus about 50% of the thickness D of the steel strip 10 of 0.71 mm.
  • FIG. 4 Another preferred embodiment of the back region of a starting material 1 for cutting lines is shown.
  • the radius R 2 has been selected larger than the radius R 1 of the recesses 36 FIG. 3 , This results in pointed tip 34 of the projections 32 and a lower height h of the projections 32.
  • the radius R 2 may preferably be in the range of thickness D of the steel strip 10.
  • the radius R2 corresponds to 50% - 150%, more preferably substantially 100% of the thickness D of the steel strip 10.
  • the starting material 1 deforms the back portion 30 of the steel strip 10.
  • the steel strip 10 deformed initially elastic and when exceeding the yield strength and plastic and that first in the range with the highest pressure load.
  • the regions of the highest loads are the tips 34 of the projections 32.
  • the projections 32 therefore initially act like elastic springs. If the yield strength in this local area is exceeded, they deform plastically, ie they are plastically compressed, thus ensuring automatic trimming.
  • This plastic change of height is in FIG. 3 represented by the height h v after deformation.
  • the projections 34 are compressed, the length of the blunt tip also increases from 1 to 1 v .
  • the projections 32 are plastically deformed at their tips, so that they are flattened and after deformation a height h v and a butt end 34 with a Have length l v .
  • the preferred in the longitudinal direction of the creasing and cutting lines concave flanks 38 and the transverse semicircular or convex flanks 39 of the projections 32 results in a progressive force-displacement characteristic which allows a dressing over a large area and yet has the necessary stability, to ensure a perfect punching result or creasing result. This is particularly true when the creasing or cutting lines have to be bent or bent, for the area of the bending radius. In particular, there is a reduced back-up effect in this area, which would lead to increased pressure in this area.
  • the ground or milled recesses reduce the contact surface between the back 30 and the back plate of the punching machine, whereby the contact stresses are greatly increased compared to ordinary back shapes. This ensures that at the first use at the tips 34, which are subjected to the highest load, such a high contact stress is created, which causes a plastic deformation at this point, without the steel strip 10 and in particular the cutting or creasing edge 20 plastic is deformed. This results in a height reduction of the height H of the steel strip 10 and thus an automatic trimming of the cutting lines.
  • the creasing or cutting line can moreover be easily introduced into the lasered slots of the carrier plate.
  • FIG. 7 shows a further preferred embodiment of a back 30 a cutting line 1, wherein the height h of the projections is lower than in the embodiment of Fig. 3 ,
  • this embodiment shows a cross-sectionally rounded back with a radius r, which corresponds to half the thickness D of the cutting line 1.
  • the dashed line 33 in the right part of the FIG. 7 illustrates that the recesses 36 and the projections 32 are only in the upper part of the rounding of the back 30.
  • FIG. 8 is a microscopic sectional view of the pattern I along the line CC FIG. 7 shown.
  • FIG. 9 is a microscopic sectional view of the pattern II along the line CC FIG. 7 shown.
  • the recesses 36 were ground with a-thin grinding wheel (thickness of the grinding wheel about 0.5 mm).
  • automatic trimming can also take place with a cutting line whose back is edge-decarburized to a depth of 5 .mu.m-100 .mu.m.
  • the edge-decarburized ferritic material of the back region is comparatively soft and can be easily plastically deformed, which also leads to an automatic dressing in the first use of such cutting lines.
  • the maximum possible dressing can be adjusted and thus adapt the cutting lines to different applications.
  • Such cutting lines can be used in punching machines, in particular in a flat bed punching machine or in a rotary punching machine. Due to the special design and dimensioning of the projections 32 of the back 30, a cutting line 1 is provided for punching tools, which is used for the first time in practice, and significantly reduces the cost of time-consuming and costly manual trimming.
  • the starting material 1 preferably consists of a tool steel and has a central cutting edge with simple plane facets (CF). Other cutting and facet shapes are also possible. Usual cutting angles are in the range from 30 ° and 60 °. The facets are scraped or ground, the cutting tip is hardened in the usual way CF or HF.
  • CF simple plane facets

Claims (12)

  1. Ligne de coupe (1) présentant :
    a. une bande d'acier (10) avec une arête de coupe (20) ;
    b. un dos (30) en regard de l'arête de coupe (20) de la bande d'acier (10) ; dans laquelle
    c. le dos (30) présente des saillies (32) qui sont dimensionnées de telle manière qu'elles soient déformables plastiquement lors de la première utilisation de la ligne de coupe (1) ; caractérisée en ce que
    d. les saillies (32) présentent une hauteur (h) de sensiblement 2 % à 20 % de l'épaisseur (D) de la bande d'acier (10) et en ce que
    e. les saillies (32) sont générées par des évidements (36) introduits dans le sens transversal (Q) de la bande d'acier (10).
  2. Ligne de coupe selon la revendication 1, dans laquelle les saillies (32) présentent sensiblement une hauteur (h) de 6 % à 10 % de l'épaisseur (D) de la bande d'acier (10).
  3. Ligne de coupe selon la revendication 1 ou 2, dans laquelle les saillies (32) sont générées dans le dos (30) par fraisage ou rodage des évidements (36) dans le sens transversal (Q) de la bande d'acier (10).
  4. Ligne de coupe selon l'une quelconque des revendications 1 à 3, dans laquelle le dos (30) est décarburé au bord jusqu'à une profondeur de 5 µm à 100 µm.
  5. Ligne de coupe selon l'une quelconque des revendications 1 à 4, dans laquelle le dos (30) est arrondi dans une section transversale par une pointe (34) des saillies (32) ou dans laquelle le dos (30) est réalisé biseauté ou doublement concave de part et d'autre dans une section transversale par une pointe (34) des saillies.
  6. Ligne de coupe selon l'une quelconque des revendications 1 à 5, dans laquelle le dos (30) est arrondi en demi-cercle dans une section transversale par une pointe (34) des saillies (32), dans laquelle le rayon d'arrondi (r) correspond sensiblement à la demi-épaisseur (D) de la bande d'acier (10).
  7. Ligne de coupe selon l'une quelconque des revendications 1 à 6, dans laquelle les saillies (32) présentent des flancs concaves (38) dans une coupe longitudinale par une pointe (34) des saillies (32).
  8. Ligne de coupe selon l'une quelconque des revendications 1 à 7, dans laquelle les évidements (36) sont formés avec un rayon (R1, R2) dans une coupe longitudinale en forme de section circulaire, en particulier en demi-cercle.
  9. Ligne de coupe selon la revendication 8, dans laquelle le rayon (R2) des évidements correspond à 10 % à 250 %, de préférence à 20 % à 150 % et de manière davantage préférée sensiblement à 100 % de l'épaisseur (D) de la bande d'acier (10).
  10. Ligne de coupe selon l'une quelconque des revendications 1 à 9, dans laquelle les saillies (32) présentent une pointe se terminant en pointe (34) dans une coupe longitudinale par une pointe (34) des saillies (32) ou présentent une pointe (34) se terminant épointée avec une longueur (1) de 1 % à 50 %, de préférence de 5 % à 30 %, de manière davantage préférée de 20 % de l'épaisseur (D) de la bande d'acier (10).
  11. Ligne de coupe selon l'une quelconque des revendications 1 à 10, dans laquelle le dos (30) a été revenu et/ou recuit et/ou décarburé au bord afin d'augmenter sa déformabilité plastique.
  12. Utilisation d'une ligne de coupe (1) selon l'une quelconque des revendications 1 à 11 dans une poinçonneuse, en particulier dans une poinçonneuse plate ou dans une poinçonneuse rotative.
EP08758860.4A 2008-04-01 2008-05-29 Lames de coupe pour couper des matériaux plats Active EP2262627B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08758860T PL2262627T3 (pl) 2008-04-01 2008-05-29 Linie tnące do cięcia płaskich materiałów

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008016640.5A DE102008016640B4 (de) 2008-04-01 2008-04-01 Schneidlinien zum Schneiden von flächigen Materialien
PCT/EP2008/004280 WO2009121383A1 (fr) 2008-04-01 2008-05-29 Lames de coupe pour couper des matériaux plats

Publications (2)

Publication Number Publication Date
EP2262627A1 EP2262627A1 (fr) 2010-12-22
EP2262627B1 true EP2262627B1 (fr) 2017-01-18

Family

ID=39952277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08758860.4A Active EP2262627B1 (fr) 2008-04-01 2008-05-29 Lames de coupe pour couper des matériaux plats

Country Status (10)

Country Link
US (1) US20110100186A1 (fr)
EP (1) EP2262627B1 (fr)
JP (1) JP5548184B2 (fr)
KR (1) KR101475982B1 (fr)
CN (1) CN102046341B (fr)
DE (1) DE102008016640B4 (fr)
DK (1) DK2262627T3 (fr)
ES (1) ES2622855T3 (fr)
PL (1) PL2262627T3 (fr)
WO (1) WO2009121383A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
KR101947835B1 (ko) 2013-01-03 2019-02-13 삼성에스디아이 주식회사 이차전지
ES2947334T3 (es) 2017-03-17 2023-08-07 Siemens Gamesa Renewable Energy As Herramienta de alineación, disposición de corte y método para el tratamiento de una pieza de trabajo
AT520930B1 (de) * 2018-06-29 2019-09-15 Voestalpine Prec Strip Gmbh Verfahren zur Herstellung eines Bandstahlmessers und Bandstahlmesser für Werkzeuge

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52135487A (en) * 1976-05-07 1977-11-12 Hitachi Metals Ltd Tool for cutting die
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.
JPH0440875Y2 (fr) * 1986-07-31 1992-09-25
US4729274A (en) * 1986-08-12 1988-03-08 Karl Marbach Strip-shaped knife for use in punching machines and the like
US4825740A (en) * 1988-03-07 1989-05-02 Mucci Sr Edmund Cutting dies and punches
DE29616585U1 (de) * 1996-09-24 1998-01-29 Essmann & Schaefer Schneid- und Ritzwerkzeug
DE19931216C1 (de) * 1999-07-06 2000-11-16 Rolf Karl Stursberg Bandförmiges Stanzmesser zur Halterung in einem Schlitz eines Messerträgers
US20050155478A1 (en) * 2004-01-21 2005-07-21 Ab Sandvik Materials Technology, Nicked cutting rule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK2262627T3 (en) 2017-05-01
WO2009121383A1 (fr) 2009-10-08
PL2262627T3 (pl) 2018-03-30
EP2262627A1 (fr) 2010-12-22
KR20110015530A (ko) 2011-02-16
JP2011516281A (ja) 2011-05-26
CN102046341A (zh) 2011-05-04
ES2622855T3 (es) 2017-07-07
KR101475982B1 (ko) 2014-12-23
JP5548184B2 (ja) 2014-07-16
DE102008016640B4 (de) 2016-06-02
DE102008016640A1 (de) 2009-10-08
US20110100186A1 (en) 2011-05-05
CN102046341B (zh) 2015-07-01

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