EP0435722A1 - Verfahren und Vorrichtung zum Formen eines Blechzuschnittes insbesondere zur Herstellung einer Maske für eine Kathodenstrahlröhre - Google Patents

Verfahren und Vorrichtung zum Formen eines Blechzuschnittes insbesondere zur Herstellung einer Maske für eine Kathodenstrahlröhre Download PDF

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Publication number
EP0435722A1
EP0435722A1 EP90403514A EP90403514A EP0435722A1 EP 0435722 A1 EP0435722 A1 EP 0435722A1 EP 90403514 A EP90403514 A EP 90403514A EP 90403514 A EP90403514 A EP 90403514A EP 0435722 A1 EP0435722 A1 EP 0435722A1
Authority
EP
European Patent Office
Prior art keywords
punch
sheet blank
deformable
peripheral
matrix
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
EP90403514A
Other languages
English (en)
French (fr)
Other versions
EP0435722B1 (de
Inventor
Gabriel Ferdinand De Smet
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Priority to AT90403514T priority Critical patent/ATE90234T1/de
Publication of EP0435722A1 publication Critical patent/EP0435722A1/de
Application granted granted Critical
Publication of EP0435722B1 publication Critical patent/EP0435722B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/02—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of a flexible element, e.g. diaphragm, urged by fluid pressure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
    • H01J9/142—Manufacture of electrodes or electrode systems of non-emitting electrodes of shadow-masks for colour television tubes

Definitions

  • the subject of the present invention is a method and a device for shaping a sheet blank, in particular for producing a cathode-ray tube mask.
  • the subject of the invention is also a cathode-ray tube mask obtained by this method.
  • the device described in the aforementioned application comprises a die and a punch subjected to the action of a press, the die and the punch being made of a deformable material, a member for clamping the peripheral part of the sheet blank, means to exert a mechanical action on the clamping member by bringing the opposite elements closer to said clamping member, means of relative movement of the clamping member and complementary means for controlling the buckling and falling of the peripheral part of the sheet blank along the side walls of the punch or of the die in order to obtain the fallen edge.
  • the buckling and falling of the peripheral part of the sheet blank are caused by a deformable peripheral blade.
  • the devices necessary for producing the cathode ray tube mask are relatively complex and fragile.
  • the object of the invention is to provide a method of shaping a sheet metal blank making, in a single operation, the curve of the central part and the falling or lifting of the peripheral zone of the sheet blank without deforming the network of perforations, while avoiding the aforementioned drawbacks.
  • a series of ribs is produced on the fallen edge of the sheet metal blank, the number, distribution, size and shape of which are determined so as to absorb the excess length.
  • the edge of said peripheral free part remains in abutment on inclined faces of the 'forming body.
  • the subject of the invention is also a device for shaping a sheet blank, in particular for producing a cathode-ray tube mask, on a press comprising a deformable matrix and a punch subjected to a pressure force, the punch and the matrix made of a deformable material being arranged on a cavity and cooperating to form the curve of the cathode ray tube and means for falling the peripheral free part of the sheet blank along the side walls of the punch in order to obtain the final fallen edge, characterized in that the punch comprises a base deformable, a substantially rectangular peripheral rigid belt, a substantially parallelepipedal sole and cushion deformable in incompressible elastic material contained in the punch belt, said base of the punch being subjected over its entire surface to a pressing force and the means for folding down the part free peripheral of the sheet blank include a peripheral forming member and a deformable ring of an incomprehensible elastic material, the deformation of which by the peripheral forming member pushes on the peripheral free part of the sheet blank and controls the bending
  • the invention also relates to a cathode-ray tube mask produced according to the method mentioned above.
  • Fig. 1 represents a sheet blank 1 of very small thickness from which a cathode-ray tube mask is produced.
  • This sheet metal blank 1 comprises a central part 1a provided with a network 2 of perforations, a peripheral part 1b comprising in the corner areas notches 2a to facilitate the falling of the edge and thus eliminate the excess material due to said falling from the edge.
  • the mask produced after forming has a curved central part 1a and a raised peripheral part 1b called the dropped edge as it appears in FIG. 2, allowing the shape of the curved.
  • the shaping device shown in FIG. 3 to make, for example, a cathode-ray tube mask comprises a matrix 11 composed of a flat bottom sole 10 on which a matrix bottom 9 rests.
  • This matrix bottom 9 has at its upper part a shape imprint 12 on the surface of which is distributed a series of calibrated shims 13.
  • the shaping device comprises an upper part 14 of a deformable matrix of elastic material which rests by its peripheral part on the edge 15 of the form imprint 12.
  • the lower surface of the upper part 14 of the matrix is in contact, by means of a support 16a, with a rod 16 connected for example to the piston 17 of a jack.
  • the forming device also consists of a punch 20 comprising a punch sole 21, a deformable cushion 22 made of incomprehensible elastic material, a deformable base 24 disposed below the cushion 22 and a substantially rectangular peripheral rigid belt 25 containing said cushion 22.
  • the base 24 of the punch 20 is subjected to pressure by means of the deformable cushion 22, itself subjected to pressure by pressure means 27 by means of the sole 21 of the punch.
  • the upper surface of the upper part 14 of the die is planar while the surface in contact with the sheet blank 1 of the base 24 of the punch 20 is curved according to a curve identical to the finished part to be obtained.
  • the upper part 14 of deformable matrix and the base 24 of the punch 20 have a shape for example lenticular which, taking into account a determined load distributed over the surface 28 of the base 24 of the punch 20 and the laws of mechanical deformation materials from which they are made, allows to obtain a curve of the sheet blank 1 without damaging the network 2 of perforations constituting the grid of the mask of the cathode ray tube.
  • the belt 25 of the punch 20 is a rectangular frame which has a "T" shaped section, the core 25a of which covers the deformable cushion 22.
  • the core 25a has on its internal face a profile 25b to influence the load exerted and on which the peripheral part of the deformable cushion 22 slides and the external face 25c of said core 25a forms the side wall of the punch 20.
  • This outer face 25c may include reliefs 29, for example of substantially conical shape.
  • the shaping device also comprises around the punch 20 and the upper part 14 of the die, a peripheral forming member designated as a whole by the reference 30 (Fig. 3).
  • the forming member 30 consists of two superimposed frames (31, 32), a rectangular upper frame 31 having on its internal wall a shoulder 33 for fitting and centering the sheet blank 1 and inclined faces 34 forming a means substantially pyramidal support and sliding, edge of the peripheral free part 1b of the sheet blank 1, and a lower frame 32 comprising a groove 35 formed in front of the upper frame 31 and into which is inserted a deformable ring 36 made of incomprehensible elastic material for shaping the part free peripheral 1b of the sheet blank 1, as will be seen later.
  • the upper frame 31 has an internal clearance 37 on which the belt 25 is in elastic support by means of a peripheral pressure means 38 formed for example by springs.
  • the lower frame 32 can be linked to the bottom of the matrix 9 and to the lower sole 10 to form a block.
  • the incompressible elastic deformable materials constituting the cushion 22 and the ring 36 may be composite materials, natural or synthetic and in particular polymers, polyurethanes of hardnesses which may be different; the materials constituting the cushion and the ring are not necessarily the same.
  • the cushion 22 and the ring 36 can be made of different materials.
  • the deformable ring 36 has been shown below the sheet blank 1 which leads to a lifting of the edge, but it is obvious that it is possible to design a symmetrical version in which the edge is folded down using a deformable ring 36 disposed above the blank and which is imparted a downward movement.
  • the sheet blank 1 is formed as follows.
  • the retractable rod 16 is held in the high position by the piston 17 which prevents any deformation of the upper part 14 of the matrix.
  • the retractable rod 16 is unlocked and, still under the action of the press slide, and by means of the deformable cushion 22, a shape is determined, according to a curve determined by the defined characteristics of the base 24 of the punch 20, the upper part 14 deformable of the matrix, of the imprint 12 of the bottom of the matrix 9 provided with calibrated shims 13, the central part 1a of the sheet blank 1 by deforming the assembly: base 24 of the punch, sheet blank 1a and part upper matrix 14 (Figs 5 and 6), the average fiber of the sheet blank 1 being placed in a determined position relative to the neutral fiber of said assembly, the base 24 of the punch 20 then regaining its initial curved shape.
  • the load exerted by the punch 20 is uniformly distributed over the entire surface of the base 24 of the punch 20 by means of the cushion 22.
  • the upper frame 31 fits into the lower frame 32 and compresses the ring deformable 36.
  • This ring 36 is deformed and inserted into the space between the internal inclined face 34 of the upper frame 31 and the external face 25c of the belt 25 of the punch 20 which gives an upward movement to the free peripheral part 1b of the blank sheet metal 1.
  • the upper part of the device is reassembled so that the ring 36, the cushion 22, the base 24 of the punch and the upper part 14 of the die return to their initial position as shown in FIG. 7.
  • the number, the distribution, the size and the shape of the ribs 40 formed by the reliefs 29 are determined so as to absorb the excess length corresponding to the variation in length of the fallen edge generated during its production.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Pyrrole Compounds (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Solid Thermionic Cathode (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Forging (AREA)
  • Physical Vapour Deposition (AREA)
EP90403514A 1989-12-18 1990-12-10 Verfahren und Vorrichtung zum Formen eines Blechzuschnittes insbesondere zur Herstellung einer Maske für eine Kathodenstrahlröhre Expired - Lifetime EP0435722B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90403514T ATE90234T1 (de) 1989-12-18 1990-12-10 Verfahren und vorrichtung zum formen eines blechzuschnittes insbesondere zur herstellung einer maske fuer eine kathodenstrahlroehre.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8916725A FR2655892A1 (fr) 1989-12-18 1989-12-18 Procede et dispositif de mise en forme d'un flan de tole notamment pour realiser un masque de tube cathodique et masque de tube cathodique obtenu selon ce procede.
FR8916725 1989-12-18

Publications (2)

Publication Number Publication Date
EP0435722A1 true EP0435722A1 (de) 1991-07-03
EP0435722B1 EP0435722B1 (de) 1993-06-09

Family

ID=9388633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90403514A Expired - Lifetime EP0435722B1 (de) 1989-12-18 1990-12-10 Verfahren und Vorrichtung zum Formen eines Blechzuschnittes insbesondere zur Herstellung einer Maske für eine Kathodenstrahlröhre

Country Status (16)

Country Link
US (1) US5119658A (de)
EP (1) EP0435722B1 (de)
JP (1) JPH04210826A (de)
KR (1) KR100199461B1 (de)
CN (1) CN1025298C (de)
AT (1) ATE90234T1 (de)
CA (1) CA2032456A1 (de)
CZ (1) CZ281528B6 (de)
DE (1) DE69001890T2 (de)
ES (1) ES2041163T3 (de)
FI (1) FI111487B (de)
FR (1) FR2655892A1 (de)
HU (1) HU206283B (de)
PL (1) PL165004B1 (de)
RU (1) RU2041755C1 (de)
YU (1) YU48025B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529663A1 (de) * 1991-08-30 1993-03-03 Hans-Helmut Heider Vorrichtung zum Formpressen von Werkstücken
FR2683168A1 (fr) * 1991-11-04 1993-05-07 Isoform Dispositif d'emboutissage de materiaux en feuille, notamment de flans de tole.
FR2733177A1 (fr) * 1995-04-21 1996-10-25 Lorraine Laminage Procede et dispositif d'emboutissage de pieces de formes non demoulables
AU724666B2 (en) * 1997-06-25 2000-09-28 Hsiu Ying Chan Flange shaping apparatus for a disk like satellite antenna
EP1946916A3 (de) * 2007-01-20 2008-08-06 Robert Bürkle GmbH Heißpresse zur Beschichtung von Werkstücken, insbesondere Möbelteilen, sowie Arbeitstisch hierfür
EP1975994A1 (de) * 2006-01-13 2008-10-01 Sony Chemical & Information Device Corporation Pressdruckeinrichtung und anbringverfahren
RU2537341C2 (ru) * 2013-01-09 2015-01-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Способ определения свойств деформирования

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US5526559A (en) * 1994-03-09 1996-06-18 Philip Morris Incorporated Method of making a cigarette package
JPH0836970A (ja) * 1994-07-26 1996-02-06 Sony Corp アパーチャグリル用フレームの加圧装置
CN1095706C (zh) * 1997-02-14 2002-12-11 好丽友金属工业株式会社 用于阴极射线管的框架的制造方法和设备
DE19719426B4 (de) * 1997-05-12 2005-06-16 Dr. Meleghy Hydroforming Gmbh & Co. Kg Verfahren und Vorrichtung zum Herstellen eines Hohlkörpers
DE10224711A1 (de) * 2002-06-04 2004-01-08 Daimlerchrysler Ag Verfahren zum optimierenden Einstellen einer Umformgeometrie eines Umformwerkzeugs, entsprechendes Umformwerkzeug und geeignetes Versuchswerkzeug
JP2004050230A (ja) * 2002-07-19 2004-02-19 Uchiyama Mfg Corp 金属板のプレス加工方法
US7416011B2 (en) * 2005-01-27 2008-08-26 Delphi Technologies, Inc. Electronic assembly having a substrate laminated within a backplate cavity
JP5016937B2 (ja) * 2007-02-05 2012-09-05 本田技研工業株式会社 プレス成形用金型
CA2691369A1 (en) * 2007-06-20 2008-12-24 Unomedical A/S A catheter and a method and an apparatus for making such catheter
US9296031B2 (en) * 2008-05-28 2016-03-29 The Boeing Company Net-shaped duct forming apparatus and method
DE102008034996B4 (de) * 2008-07-25 2010-11-18 Benteler Automobiltechnik Gmbh Vorrichtung zum Warmformen, Presshärten und Schneiden eines Halbzeugs aus härtbarem Stahl
CN101618407B (zh) * 2009-07-31 2011-06-15 葛洲坝集团第一工程有限公司 曲面金属止水片成型机
DE102009056315A1 (de) * 2009-12-01 2011-06-09 GM Global Technology Operations LLC, ( n. d. Ges. d. Staates Delaware ), Detroit Streckziehvorrichtung und Verfahren zum Streckziehen eines Werkstücks sowie streckgezogenes Teil
CN101767127B (zh) * 2010-01-20 2012-06-27 浙江中隧桥波形钢腹板有限公司 折弯式波形钢腹板成型方法及专用模具
JP6085878B2 (ja) * 2012-09-12 2017-03-01 内山工業株式会社 金属板の加工方法及び金属製の網体
JP5510533B1 (ja) * 2012-12-17 2014-06-04 Ｊｆｅスチール株式会社 プレス成形方法
CN104494181A (zh) * 2014-12-10 2015-04-08 南京工程学院 薄膜式小行程压力机
CN104841774B (zh) * 2015-05-26 2017-01-11 珠海格莱利模具有限公司 汽车鼓式制动蹄的冲压模具和冲压方法
DE102016213375B4 (de) 2016-07-21 2022-10-13 Audi Ag Verfahren zum Herstellen eines Metallbearbeitungswerkzeugs und Metallbearbeitungswerkzeug
CN106720520B (zh) * 2016-12-13 2023-07-11 湖南惟楚福瑞达生物科技有限公司 一种茯砖茶压制模具及方法
CN106799431A (zh) * 2017-03-27 2017-06-06 盐城市港城特种玻璃制品有限公司 一种用于门窗制造的金属件压制折弯装置
JP6502432B2 (ja) * 2017-08-17 2019-04-17 孝久 三浦 ダイならびにローラーヘミング加工システムおよび金属ワークにローラーヘミング加工を施す方法
CN108787843B (zh) * 2018-06-05 2020-08-14 广东工业大学 一种提升铝合金板料拉深成形极限的方法及铝合金毛坯料
CN111151624B (zh) * 2020-01-09 2021-08-27 贵州永红航空机械有限责任公司 一种封口锥体柔性成型装置及方法
CN111451726B (zh) * 2020-04-14 2021-07-02 厦门立洲五金弹簧有限公司 一种汽车电子用弹片成型方法
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CN113859370B (zh) * 2021-11-02 2023-04-14 一汽解放汽车有限公司 一种模具
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Citations (4)

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Publication number Priority date Publication date Assignee Title
US3183696A (en) * 1958-06-02 1965-05-18 Robert B Way Process for forming masks and stencils
US3234774A (en) * 1962-11-21 1966-02-15 Du Pont Compression pad
DE3128251A1 (de) * 1981-07-17 1982-08-12 Daimler-Benz Ag, 7000 Stuttgart "tiefziehwerkzeug fuer bleche"
DE3642208A1 (de) * 1985-12-11 1987-06-25 Hitachi Ltd Verfahren zur herstellung von werkstuecken in der form von schalen mit gewoelbter oberflaeche

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US2390803A (en) * 1943-05-19 1945-12-11 Mcdonnell Aircraft Corp Process and apparatus for manufacturing plastic articles
US2859719A (en) * 1953-08-17 1958-11-11 Northrop Aircraft Inc Combined resilient press pad and expandable bladder
DE3572081D1 (en) * 1984-09-28 1989-09-07 Philips Nv Method of drape drawing a shadow mask for a colour display tube and device for such a method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183696A (en) * 1958-06-02 1965-05-18 Robert B Way Process for forming masks and stencils
US3234774A (en) * 1962-11-21 1966-02-15 Du Pont Compression pad
DE3128251A1 (de) * 1981-07-17 1982-08-12 Daimler-Benz Ag, 7000 Stuttgart "tiefziehwerkzeug fuer bleche"
DE3642208A1 (de) * 1985-12-11 1987-06-25 Hitachi Ltd Verfahren zur herstellung von werkstuecken in der form von schalen mit gewoelbter oberflaeche

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0529663A1 (de) * 1991-08-30 1993-03-03 Hans-Helmut Heider Vorrichtung zum Formpressen von Werkstücken
WO1993004828A1 (de) * 1991-08-30 1993-03-18 Heider Hans Helmut Vorrichtung zum formpressen von werkstücken
FR2683168A1 (fr) * 1991-11-04 1993-05-07 Isoform Dispositif d'emboutissage de materiaux en feuille, notamment de flans de tole.
EP0541427A1 (de) * 1991-11-04 1993-05-12 Isoform Vorrichtung zum Formstanzen von Blattmaterialien, insbesondere von Blechplättchen
US5272898A (en) * 1991-11-04 1993-12-28 Isoform Device for stamping materials in sheet form, especially sheet metal blanks
FR2733177A1 (fr) * 1995-04-21 1996-10-25 Lorraine Laminage Procede et dispositif d'emboutissage de pieces de formes non demoulables
AU724666B2 (en) * 1997-06-25 2000-09-28 Hsiu Ying Chan Flange shaping apparatus for a disk like satellite antenna
EP1975994A1 (de) * 2006-01-13 2008-10-01 Sony Chemical & Information Device Corporation Pressdruckeinrichtung und anbringverfahren
EP1975994A4 (de) * 2006-01-13 2010-02-17 Sony Chem & Inf Device Corp Pressdruckeinrichtung und anbringverfahren
EP1946916A3 (de) * 2007-01-20 2008-08-06 Robert Bürkle GmbH Heißpresse zur Beschichtung von Werkstücken, insbesondere Möbelteilen, sowie Arbeitstisch hierfür
RU2537341C2 (ru) * 2013-01-09 2015-01-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Способ определения свойств деформирования

Also Published As

Publication number Publication date
CN1053762A (zh) 1991-08-14
CZ610890A3 (en) 1996-06-12
KR100199461B1 (ko) 1999-06-15
CA2032456A1 (fr) 1991-06-19
DE69001890T2 (de) 1993-12-02
FI111487B (fi) 2003-07-31
FI906211A (fi) 1991-06-19
PL288313A1 (en) 1991-08-12
EP0435722B1 (de) 1993-06-09
ATE90234T1 (de) 1993-06-15
FR2655892A1 (fr) 1991-06-21
HU206283B (en) 1992-10-28
HUT58571A (en) 1992-03-30
PL165004B1 (pl) 1994-10-31
FI906211A0 (fi) 1990-12-17
CZ281528B6 (cs) 1996-10-16
KR910013409A (ko) 1991-08-08
RU2041755C1 (ru) 1995-08-20
US5119658A (en) 1992-06-09
CN1025298C (zh) 1994-07-06
JPH04210826A (ja) 1992-07-31
HU908240D0 (en) 1991-06-28
ES2041163T3 (es) 1993-11-01
YU48025B (sh) 1996-10-09
YU236990A (sh) 1994-11-15
DE69001890D1 (de) 1993-07-15

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