EP0317637A1 - Procede de pliage de couteau en bande - Google Patents

Procede de pliage de couteau en bande Download PDF

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Publication number
EP0317637A1
EP0317637A1 EP88904610A EP88904610A EP0317637A1 EP 0317637 A1 EP0317637 A1 EP 0317637A1 EP 88904610 A EP88904610 A EP 88904610A EP 88904610 A EP88904610 A EP 88904610A EP 0317637 A1 EP0317637 A1 EP 0317637A1
Authority
EP
European Patent Office
Prior art keywords
band blade
band
pushing means
outlet
mold
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Withdrawn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
EP88904610A
Other languages
German (de)
English (en)
Other versions
EP0317637A4 (fr
Inventor
Suehiro Mizukawa
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.)
OGAWA Naoki
OHTANI Susumu
Original Assignee
OGAWA Naoki
OHTANI Susumu
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=15390322&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0317637(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by OGAWA Naoki, OHTANI Susumu filed Critical OGAWA Naoki
Publication of EP0317637A1 publication Critical patent/EP0317637A1/fr
Publication of EP0317637A4 publication Critical patent/EP0317637A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/20—Making tools by operations not covered by a single other subclass
    • B21D37/205—Making cutting tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
    • B21D5/045—With a wiping movement of the bending blade
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/60—Making other particular articles cutlery wares; garden tools or the like
    • B21D53/64—Making other particular articles cutlery wares; garden tools or the like knives; scissors; cutting blades

Definitions

  • the present invention relates to a method of bending a band blade used for a so-called Thomson blade wooden model or the like, such that the band blade has curved portions each having the desired radius of curvature.
  • a Thomson blade wooden model is used for punching, into a predetermined shape, a plate-like material such as wood, paper, cloth, leather, plastics, etc., or for forming a slit unit of a predetermined shape in such plate-like material.
  • a wooden model may be made by pushing and embedding band blades 1 each bent into a predetermined shape, to and in a base member 2 in a slit unit 3 formed therein.
  • the tips 4 of the band blades 1 project from the base member 2.
  • the Thomson blade wooden model shown in Fig. 3 is used for forming a slit unit of a predetermined shape, in the, plate-like material above-mentioned.
  • a plurality of band blades 1 are used with small-width gaps 5 provided therebetween.
  • the slit unit 3 includes a plurality of slits which are intermittently formed and generally form contours identical in shape with those of the band blades 1. Non-slit portions 6 in which slits are not formed, are opposite to the gaps 5 and concaves 7 of the band blades 1. Pressing blades 8 for forming folding lines may be embedded in the base member 2, as necessary.
  • the general contours of the slit unit 3 be identical or substantially identical in shape with those of the band blades 1. If the difference in shape therebetween is excessively great, the band blades 1 cannot be embedded in the slit unit 3. In this connection, if the band blades 1 are required to have arcuate portions, the radiuses of curvature of these arcuate portions need to be identical or substantially identical with those of the curved portions of the slit unit 3.
  • Such curved portions are formed by bending the band blades 1 as outlined below.
  • Each band blade 1 in a state before bent, is placed on a grooved concave 11 in a lower mold 10 as shown by virtual lines in Fig. 4. Then, the band blade 1 is beaten with an upper mold 12, causing the blade 1 to be bent into the concave 11, while the beating force is adjusted according to the actual bending state. These forming operations are carried out for a plurality of portions in a predetermined width of of the band blade 1.
  • the present invention is proposed to solve the problems above-mentioned with the object of providing a method of bending a band blade into a predetermined shape readily and promptly even by beginners without special training.
  • the band blade bending method of the present invention comprises the steps of:
  • the band blade may have an arcuate portion having the desired radius of curvature, by properly setting the bending angle of the band blade and the number of bending times. For example, when the intermittent feed distance of the band blade is set to a predetermined value, the arcuate portion having the desired radius of curvature may be accurately formed by merely controlling the bending angle.
  • the band blade may be bent readily and accurately so as -to have arcuate portions each having the desired curvature of radius. Further, such bending may be readily achieved by not only those skilled but also by beginners without special training. Further, the bending may be carried out as controlled by a computer. This enables to carry out a complicated bending which would otherwise be carried out with an extreme difficulty in a conventional technique.
  • Fig. lA to Fig. 1D show steps of a bending method in accordance with the present invention.
  • a mold 20 is provided at the outlet corner thereof with an acutely pointed forming portion 21.
  • Pushing means 22 is movable toward and away from the forming portion 21 along an arcuate passage A-A shown in Fig. lA.
  • Feed rollers 23 are disposed for intermittently feeding a band blade 1.
  • the feed rollers 23 are first rotated by a predetermined angle such that the band blade 1 is sent out from the outlet of the mold 20.
  • the predetermined angle of rotation of the feed rollers 23 is determined such that feeding the band blade 1 is halted when a predetermined portion P 1 of the band blade 1 is brought to a position opposite to the forming portion 21.
  • the pushing means 22 is moved right by a predetermined amount along the arcuate passage A-A, as shown in Fig. 1B. This causes the band blade 1 to be pushed to the forming portion 21 such that the portion P 1 is bent at a predetermined angle.
  • the pushing means 22 is then returned to the original position as shown in Fig. lC.
  • the feed rollers 23 are again rotated by a predetermined angle to feed the band blade 1. Such feed is halted when a portion P 2 of the band blade 1 is brought to a position opposite to the forming portion 21, the portion P 2 being apart from the portion P 1 already bent, by a predetermined distance.
  • the pushing means 22 is moved right by the predetermined distance.
  • the band blade 1 is pushed to the forming portion 21, causing the band blade 1 to be bent at the predetermined angle.
  • the band blade 1 is bent at a plurality of portions thereof at regular spatial intervals. This causes the band blade 1 to be bent generally in the form of a circular arc.
  • the intermittent feed distance D of the band blade 1 may be determined such that, for example, equally divided portions to be bent of the band blade 1 are successively brought to a position opposite to the forming portion 21. Further, the number of bending times is calculated with the use of (i) the bending angle of the band blade 1 bent by one pushing operation of the pushing means 22 thereto and (ii) the radius of curvature of the arcuate portion desired to be formed by bending. By properly setting these values, an accurate bending may be achieved.
  • the bending angle of the band blade 1 bent by the pushing means 22 is should be set to an angle in which the desired bending angle of the band blade 1 is added to the angle to be restored by the springback.
  • the band blade 1 when the band blade 1 is bent, the band blade 1 is slightly restored due to springback after such bending. Accordingly, provision is made such that the pushing means 22 is moved slightly upward along the arcuate passage A-A after having passed under the forming portion 21. This causes the band blade 1 to be bent at an acute angle smaller than a right angle. After the pushing means 22 has been retreated, the band blade 1 is restored to a right angle by the springback.
  • Fig. 2 shows an arcuate portion of the band blade 1 bent according to the steps shown in Fig. lA to Fig. 1D.
  • A shows an opening angle between both ends of the arcuate portion formed by bending
  • a shows opening angles between the portions bent by the pushing means 22.
  • the opening angles a are equal to one another; that is, each of the opening angles a is an angle obtained by equally dividing the opening angle A.
  • r is a radius of curvature of the arcuate portion.
  • the bending operation may be controlled by a computer, by previously entering therein a pattern of feed amounts of a band blade fed. from the mold outlet and a predetermined moving amount of the pushing means.
  • the present method may be used for bending a material into a relatively complicated shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Procédé consistant à former une partie courbée selon un angle déterminé d'un couteau en bande (1), sortant par intermittence de l'orifice de sortie d'un moule (20), à l'aide d'un organe poussoir (22) pouvant se déplacer sur une largeur déterminée, et d'une surface de moulage (21) située au niveau de l'orifice de sortie du moule (20), pendant que l'avance du couteau en bande (1) est arrêtée. Ce procédé permet de conférer aisément une courbure désirée à l'article.
EP19880904610 1987-06-10 1988-05-18 Procede de pliage de couteau en bande. Withdrawn EP0317637A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62145668A JPH0661583B2 (ja) 1987-06-10 1987-06-10 帯刃の曲げ加工方法
JP145668/87 1987-06-10

Publications (2)

Publication Number Publication Date
EP0317637A1 true EP0317637A1 (fr) 1989-05-31
EP0317637A4 EP0317637A4 (fr) 1989-10-17

Family

ID=15390322

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880904610 Withdrawn EP0317637A4 (fr) 1987-06-10 1988-05-18 Procede de pliage de couteau en bande.

Country Status (3)

Country Link
EP (1) EP0317637A4 (fr)
JP (1) JPH0661583B2 (fr)
WO (1) WO1988009703A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680711A1 (fr) * 1991-08-30 1993-03-05 Brasil Compressores Sa Procede pour la flexion permanente de corps deformables.
JPH05329544A (ja) * 1992-05-29 1993-12-14 Tachibana Seisakusho:Kk 曲げ装置
EP0574014A1 (fr) * 1992-06-11 1993-12-15 ITAMI INDUSTRIAL Co., Ltd. Appareil de pliage de couteau en bande
EP0626221A1 (fr) * 1993-05-24 1994-11-30 Suntex Co. Ltd. Dispositif pour cintrer une pièce à usiner en forme de feuillard
EP0699488A1 (fr) * 1994-08-20 1996-03-06 ITAMI INDUSTRIAL Co., Ltd. Dispositif pour cintrer une lame
WO2006055998A1 (fr) * 2004-11-24 2006-06-01 Universität für Angewandte Kunst Wien Procede d'amorçage de machines a cintrer
US7082804B2 (en) 2003-07-09 2006-08-01 1500999 Ontario Inc. System and method for bending strip material to create cutting dies
CN103048948A (zh) * 2012-12-25 2013-04-17 南通恒康数控机械有限公司 一种环刀数控软件自动扭刀点的计算方法
CN104889202A (zh) * 2015-06-10 2015-09-09 昌利数控设备（深圳）有限公司 弯刀机用大角度弯刀装置及弯刀机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5463890A (en) * 1992-05-29 1995-11-07 Kabushiki Kaisha Tachibana Seisakusho Automatic bending apparatus and marking device for band-shaped work
JPH07108412B2 (ja) * 1993-02-15 1995-11-22 伊丹工業株式会社 ナイフの曲げ加工装置
US5507168A (en) * 1993-06-17 1996-04-16 Mizukawa; Suehiro Apparatus for bending a strip material
KR0182069B1 (ko) * 1995-06-22 1999-04-01 송병준 컷팅블레이드의 절곡시스템
JP2004090039A (ja) * 2002-08-30 2004-03-25 Komatsu Ltd キャブフレーム用異形断面管材の曲げ加工方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118987A2 (fr) * 1983-02-12 1984-09-19 British United Shoe Machinery Limited Appareil et procédé pour cintrer des bandes métalliques
EP0088576B1 (fr) * 1982-03-04 1986-05-28 British United Shoe Machinery Limited Procédés et appareil de fabrication d'outils coupants

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1024224B (it) * 1974-11-15 1978-06-20 Del Fabbro Remigio Maochina staffarice ad alimen tazione continua oberante a recupero di materiale e relativo me todo di oberare per la qustruzio ne delle dette staffe

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0088576B1 (fr) * 1982-03-04 1986-05-28 British United Shoe Machinery Limited Procédés et appareil de fabrication d'outils coupants
EP0118987A2 (fr) * 1983-02-12 1984-09-19 British United Shoe Machinery Limited Appareil et procédé pour cintrer des bandes métalliques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8809703A1 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680711A1 (fr) * 1991-08-30 1993-03-05 Brasil Compressores Sa Procede pour la flexion permanente de corps deformables.
JPH05329544A (ja) * 1992-05-29 1993-12-14 Tachibana Seisakusho:Kk 曲げ装置
JPH0790274B2 (ja) * 1992-05-29 1995-10-04 株式会社橘製作所 曲げ装置
EP0574014A1 (fr) * 1992-06-11 1993-12-15 ITAMI INDUSTRIAL Co., Ltd. Appareil de pliage de couteau en bande
EP0626221A1 (fr) * 1993-05-24 1994-11-30 Suntex Co. Ltd. Dispositif pour cintrer une pièce à usiner en forme de feuillard
EP0699488A1 (fr) * 1994-08-20 1996-03-06 ITAMI INDUSTRIAL Co., Ltd. Dispositif pour cintrer une lame
US7082804B2 (en) 2003-07-09 2006-08-01 1500999 Ontario Inc. System and method for bending strip material to create cutting dies
WO2006055998A1 (fr) * 2004-11-24 2006-06-01 Universität für Angewandte Kunst Wien Procede d'amorçage de machines a cintrer
CN103048948A (zh) * 2012-12-25 2013-04-17 南通恒康数控机械有限公司 一种环刀数控软件自动扭刀点的计算方法
CN103048948B (zh) * 2012-12-25 2015-03-25 南通恒康数控机械有限公司 一种环刀数控软件自动扭刀点的计算方法
CN104889202A (zh) * 2015-06-10 2015-09-09 昌利数控设备（深圳）有限公司 弯刀机用大角度弯刀装置及弯刀机

Also Published As

Publication number Publication date
EP0317637A4 (fr) 1989-10-17
WO1988009703A1 (fr) 1988-12-15
JPS63309328A (ja) 1988-12-16
JPH0661583B2 (ja) 1994-08-17

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19890202

AK Designated contracting states

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Designated state(s): DE FR GB IT

A4 Supplementary search report drawn up and despatched

Effective date: 19891017

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Ipc: B21D 53/64

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Effective date: 19910225

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Effective date: 19920812