EP1604751B1 - Stanzeinrichtung und Stanzstempel für diese - Google Patents

Stanzeinrichtung und Stanzstempel für diese Download PDF

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Publication number
EP1604751B1
EP1604751B1 EP20050011615 EP05011615A EP1604751B1 EP 1604751 B1 EP1604751 B1 EP 1604751B1 EP 20050011615 EP20050011615 EP 20050011615 EP 05011615 A EP05011615 A EP 05011615A EP 1604751 B1 EP1604751 B1 EP 1604751B1
Authority
EP
European Patent Office
Prior art keywords
head
recess
punch according
punch
shank
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.)
Expired - Fee Related
Application number
EP20050011615
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1604751A1 (de
Inventor
Hans-Joachim Halamoda
Siegfried Beerhalter
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.)
Groz Beckert KG
Original Assignee
Groz Beckert 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
Application filed by Groz Beckert KG filed Critical Groz Beckert KG
Publication of EP1604751A1 publication Critical patent/EP1604751A1/de
Application granted granted Critical
Publication of EP1604751B1 publication Critical patent/EP1604751B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • Y10T83/9411—Cutting couple type
    • Y10T83/9423—Punching tool
    • Y10T83/9428—Shear-type male tool
    • Y10T83/943—Multiple punchings
    • 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
    • Y10T83/9457—Joint or connection
    • Y10T83/9473—For rectilinearly reciprocating tool
    • Y10T83/9476—Tool is single element with continuous cutting edge [e.g., punch, etc.]

Definitions

  • the invention relates to a stamping device and its punch according to the preamble of claim 1 (see for example EP-A-1 005 963).
  • the invention relates to a punching device and a punch for unfired planar ceramic substrates, in particular so-called green sheets.
  • green sheets must be provided with a number of small holes during their production, which later serve, for example, for the through-connection of conductors which are applied to the ceramic substrates. These are relatively small holes of significantly less than a millimeter in diameter, such holes are to be attached in large numbers.
  • the punching device has a corresponding large number of punches on.
  • the punches are provided with heads which are held in a holding device, for example a holding plate, in order to be moved up and down with it in the longitudinal direction of the shank, ie for example.
  • a similar punching device is known, for example, from EP 0 354 152 B1.
  • the punches are moved here by magnetic drives.
  • These punches are each provided with a head which is attached to the elongated shaft of the punch.
  • the punches are exposed in their activity a high abrasive load. They must therefore be made of a suitably wear-resistant hard material. They are therefore formed from an elongated needle-like body to which the usually made of other material head is recognized later to approach the top plate or other drives.
  • the stamps for green sheets can not usually be provided with artificial heads. Due to the small diameter of the shanks of the punches are usually no sufficient permanent positive connections between a plastic head and the punch.
  • the punch according to the invention has a punch shaft which has a head at one end and a working part at the opposite end.
  • At the head of the stamp shaft is provided on its lateral surface with at least one recess.
  • At the head of the stamp shaft is provided on its lateral surface with at least one recess.
  • an annular head In the region of the recess sits an annular head, the one in the recess and cross The head thereby positively locking on the shaft locking projection.
  • This projection is created by plastic deformation of the head. This usually has the consequence that the material of the head rests against the shaft under a certain bias. This is especially true when the head is made of a suitable metal such as steel, brass or aluminum.
  • a Kunststoffumspritzung which can be solved as a result of natural shrinkage or shrinkage of the plastic something, a tight fit is secured here.
  • the production of the punch is possible with very short cycle times. It is only necessary to push a head blank over the shaft and then secure it to the shaft by means of a suitable deformation method for plastically deforming the head.
  • the production methods with which this can be realized for example, embossing, pressing, rolling, hammering or other methods for chipless shaping.
  • the head is made of a low-melting metal, it could if necessary also be produced in a casting process, for example in a die-casting process. However, this is considered less advantageous because the overhead involved is higher.
  • the projection securing the head to the shaft is preferably produced by plastic deformation of the head blank.
  • a depression is formed on the head during manufacture.
  • the shape of the recess corresponds to the shape of the recess provided on the shaft. If this is, for example, an annular bead, an annular recess is preferably formed on the otherwise cylindrical outer peripheral surface of the head. This will the required plastic deformation of the head is kept to a minimum.
  • an antagonistic or deforming pressure for example in the axial direction on the head, in order to promote the radially inwardly directed inflow of the head material into the recess of the shaft.
  • the recess of the shaft preferably has a waisted shape. Sharp edges are avoided in order not to favor breaking off of the slender shaft in the region of the recess.
  • the recess is bounded by an annular concavely curved annular surface, which is formed without edges and without heels. The recess then has an adapted shape.
  • the head is preferably located at the end of the shaft, which is opposite the working part. He preferably sits at the end of the shaft, so that the shaft end terminates with the head or slightly protrudes from the head. It has proven to be advantageous to arrange the recess and corresponding to the recess in the recess projection of the head close to the shaft end.
  • the passage of the head on the side remote from the shaft end has a cylindrical guide section which transmits or supports tilting moments acting on the head to the shaft, without stressing the zone of the shaft weakened by the recess. This is especially true when the recess of the shaft, as is preferably the case, at the upper, the shaft end facing the plan surface of the head closes.
  • the head preferably has, prior to its plastic deformation, a through-hole whose width is slightly greater than that of the shaft, so that the shaft can be inserted into the head with little play. After the plastic deformation of the head sits on the shaft without play. Preferably, the through hole of the head has been narrowed to the full length so far that the head sits gap-free on the shaft.
  • a cohesive connection can be provided.
  • This can be, for example, an adhesive connection.
  • the advantage of this measure is, for example, the easy introduction of the adhesive, which can be accommodated in the recess of the shaft before the plastic deformation process.
  • the adhesive for positive locking of the head on the shaft after the plastic deformation of the head is introduced by pulling by capillary action after application between the shaft and head.
  • a plurality of recesses may be provided instead of a recess, in which case the above statements apply accordingly.
  • the recesses may extend around the entire circumference of the shaft or only over part of it, and may be axially spaced or at the same height.
  • FIG. 1 illustrates a stamping tool 1 to which a lower tool 2 and an upper tool 3 belong.
  • the upper tool 3 is by means of two guides 4, 5 on the lower tool 2 back and away linearly reciprocally movable.
  • the lower tool 2 includes a support plate or receiving device 6, in which punched holes 7 are formed.
  • the punching holes 7 are numerous in the support plate 6 and formed at those locations where holes are to be punched in a laid on the support plate 6 Green Sheet (unfired ceramic substrate).
  • stamps 8 are arranged on the upper tool 3, which point towards the lower tool 2 and end above the support plate 6.
  • the punches 8 can dip into the punch holes 7 as they are moved down.
  • Above the platen 6 is a hold-down plate 9 is arranged to guide the punch 8 and to hold down the lying on the platen green sheet 9, which has been left in Figure 1 away to give the view of the punch 8 and the receiving device 6 free.
  • the upper tool 3 together with hold-down plate 9 are shown in FIG.
  • the hold-down plate 9 is arranged vertically above the support plate 6 independently of the punching movement of the punch 8 and defines with this a gap 11 for receiving a green sheet, not shown.
  • the hold-down plate 9 is connected to the upper tool 3 or part thereof and movable therewith.
  • An arrow 12 indicates the direction of movement of the upper tool 3.
  • the punch 8 is axially guided in the hold-down plate 9 by at least one guide bush 13 and possibly another provided on the hold-down plate 9 guide bushing 14.
  • the punch 8 preferably has a multi-stepped profile and a slim working part 15 at its lower part projecting into the guide bush 14. This is associated with the punched hole 7, which is formed in a sleeve 16 held on the receiving device 6.
  • the punch 8 is held axially immovable in an upper holding device 17, which serves to give the punch 8 its axial movement.
  • the holding device 17 belongs to the upper tool 3. It can basically be designed in different ways. It is essential that it has a drive element 18, which is formed in the present embodiment as a plate and serves to move the punch 8 down.
  • Next to the holding device 17 includes a return element 19, which is formed in the present embodiment as a plate and serves to the punch 8 against its punching direction, i. to move away from the receiving device 6 away.
  • the plates forming the drive element 18 and the return element 19 can, as shown, be fixedly attached to one another or else movable relative to one another. They can be stretched by spring means against each other and clamp the punch 8 between each other. It may also not illustrated spring means between the punch 8 and the holding device 17 may be provided.
  • the punch 8 has at least one preferably cylindrical elongated shaft 21 and a preferably also substantially cylindrical head 22, which are positively connected with each other.
  • the shaft 21 and the head 22 are preferably made of different metals.
  • the shaft 21 is in terms of its Stan properties optimized. In particular, at his working part 15 us he is subject to considerable wear, especially in the field of cutting edges. This is countered by a suitable choice of materials.
  • the shaft 21 is thus made of a suitable steel.
  • the head 22, however, serves only to initiate the required driving forces in the punch 8. Oversized hardness or wear resistance is not important. It is thus formed as a separate part of a suitable metal, such as a good deformable steel or other metals, and attached to the shaft 21. This is illustrated in detail in FIGS. 3 and 4.
  • the shaft 21 has for attachment of the head 22 has a recess 23, for example in the form of a shank 21 surrounding flat annular bead.
  • This has, as Figure 3 illustrates, a waisted shape.
  • the limiting annular surface 24 is formed without edges and without heels.
  • the axial length of the annular surface 24 exceeds the depth of the recess 23 by far.
  • the axial length of the annular surface 24 also exceeds the largest diameter of the annular surface 24 by far. Further, it has been found to be advantageous if the axial length also exceeds the circumference of the annular surface 24, as it is to be measured at the point with the smallest diameter of the annular surface 24.
  • the head 22 is formed from an initially hollow cylindrical blank 22 ', which has a central through-bore 25.
  • the diameter of the through hole is preferably slightly larger than the shaft diameter, so that the blank 22 'can be pushed over the shaft 21 without difficulty.
  • the blank 22' is deformed. This can be seen by comparing Figures 3 and 4.
  • the head 22 is provided with a cylindrical recess 26 on its round circumferential recess 27, which is caused by a radially inwardly directed compression of the head 22.
  • the recess 27 preferably corresponds in shape to the shape of the recess 23.
  • the material of the head 22 flows into the recess 23 to form a radially inwardly directed rib-like projection 28.
  • the head 22 thus lies flat against the annular surface 24, in particular in the region of the recess 23.
  • the head 22 may be compressed radially inwardly in its remaining area, so that its through hole 25 rests without gaps and preferably with a certain bias on the shaft 21.
  • the head 22 thus has an upper plane surface 29 serving for introducing force, a lower plane surface 31, which likewise serves to introduce force, and a cylindrical outer surface 26 which adjoins the lower plane surface 31 facing the working part 15 of the shaft 21.
  • the recess 27 preferably adjoins the plane surface 29.
  • the head 22 is arranged so that the plane surface 29 is substantially aligned with an upper edge 32, in which the cylindrical shaft 21 merges into the curved annular surface 24.
  • the other edge 33, at which the annular surface 24 ends preferably at about the middle height of the head 22nd
  • the presented configuration has the advantage that the head 22 can be attached to the shaft 21 in an axially desired and selected position.
  • the precision of the position of the recess 23 does not matter.
  • the position of the head 22 is set at the moment of crimping the head 22.
  • Other manufacturing tolerances play no or only a very minor role. It can be thus easily produce punch 8 in high quality.
  • very different embodiments can be produced in the simplest way, for example by combining differently shaped heads 22 with shafts 21 of one and the same type. Different axial head lengths or head diameters or head materials can be used.
  • the heads 22 in different axial positions, in which the recess 23 is located within the through hole 25, are fixed.
  • the stamping punch 8 described so far operates in the punching tool 1 as follows:
  • the upper tool 3 is reciprocated in the direction of the arrow 12.
  • the head 22 is held between the drive member 18 and the return member 19. Both attack on the flat surfaces 29, 31 of the head 22.
  • the power transmission between the head 22 and the shaft 21 takes place by positive engagement between the projection 28 and the recess 23 ( Figure 4).
  • the power transmission is flat and uses the entire ring surface 24. It therefore comes neither to local stress peaks, nor shear effects. Even with fast work, the heads 22 do not detach from the punches 8. This is an essential advantage resulting from the fact that the projection 28 and the recess 23 are identical in shape or, strictly speaking, have completely complementary shapes to each other.
  • the recess 23 does not extend around the entire circumference of the shaft 21 but only over a part thereof. It can be presented as a rounded, for example, a cylindrical lateral surface notch following.
  • a further recess 35 may be provided which has a same or a modified shape. Accordingly, after deformation of the blank 22 ', the head 22 has a first upper recess 27 in the region of the upper recess 23 and a recess 36 in the region of the lower recess 35.
  • the recesses 27, 36 are formed by radial compression and deformation of the blank 22 'and form dents or indentations in the lateral surface 26.
  • the head 22 may also extend upwards beyond the recess 23, so that the upper planar surface 29 is at an axial distance from the edge 32. Preferably, however, remains between the lower end face 31 of the head 22 and the lower edge 33 of the shaft 21, an axial distance which is at least as large as the axial length of the recess 23 and which is substantially greater than the diameter of the shaft 21. Thereby the head 22 held tilt-proof on the shaft 21.
  • Figures 9 and 10 illustrate a modified embodiment of the punch 8, in which the head 22 in addition is secured to the shank 21 cohesively for positive locking.
  • a suitable connecting means for example an adhesive hardening by pressure or heat or intimate metal contact 37, is arranged in the recess 23. This is not stripped when gluing the blank 22 'and thus remains as a depot in the recess 23.
  • the adhesive 37 is largely displaced, wherein it penetrates on both sides of the recess 23 in the gap formed between the head 22 and the shaft 21 and fills this to form a glued joint 38.
  • the adhesive 27 may subsequently cure over time.
  • it can be made to harden by heat. It is also possible to use adhesives which harden as soon as the glue joint falls below a minimum width, as is the case with some instant adhesives.
  • the punch according to the invention has a positively held head 22.
  • the head 22 is held on the shaft 21 of the punch 8 by displacing material radially inward by plastic deformation, for example by radial application of pressure, so that a projection 28 is formed which rests flat against the wall of a recess 23. It ensures a safe and lasting power transfer.
EP20050011615 2004-06-09 2005-05-30 Stanzeinrichtung und Stanzstempel für diese Expired - Fee Related EP1604751B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202004009138U 2004-06-09
DE200420009138 DE202004009138U1 (de) 2004-06-09 2004-06-09 Stanzeinrichtung und Stanzstempel für diese

Publications (2)

Publication Number Publication Date
EP1604751A1 EP1604751A1 (de) 2005-12-14
EP1604751B1 true EP1604751B1 (de) 2007-04-18

Family

ID=32864820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050011615 Expired - Fee Related EP1604751B1 (de) 2004-06-09 2005-05-30 Stanzeinrichtung und Stanzstempel für diese

Country Status (5)

Country Link
US (1) US7578224B2 (ja)
EP (1) EP1604751B1 (ja)
JP (1) JP4966516B2 (ja)
KR (1) KR20060048260A (ja)
DE (2) DE202004009138U1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101817045B (zh) * 2010-03-19 2011-08-31 中国电子科技集团公司第二研究所 可旋转式生瓷带冲孔组件
CN104626374B (zh) * 2014-12-22 2016-08-24 中国电子科技集团公司第二研究所 打孔机转动机构
US11466453B2 (en) * 2015-01-23 2022-10-11 United States Gypsum Company Wallboard punch assembly with stripper bushings
CN104690148B (zh) * 2015-02-27 2017-01-25 齐鲁工程装备有限公司 一种锻造圆钢冲孔设备

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2359682A (en) * 1944-01-11 1944-10-03 Curtiss Wright Corp Punch press die
US3186284A (en) * 1961-11-01 1965-06-01 Minnie Punch & Die Company Inc Punching die set
US3334406A (en) * 1965-04-05 1967-08-08 Minnie Punch & Die Company Inc Method for alignment and mounting of a piercing punch
US3379083A (en) * 1965-11-19 1968-04-23 Oberg Mfg Co Inc Machineable headed punch
GB1274464A (en) * 1969-06-07 1972-05-17 Holland Ltd Improvements in or relating to methods of forming punches
JPS4897320A (ja) * 1972-03-24 1973-12-12
US3974728A (en) * 1975-08-14 1976-08-17 Pivot Punch Corporation Multi-part punch
DE7826111U1 (de) * 1978-09-02 1978-12-21 Rohde & Schwarz, 8000 Muenchen Praezisions-schneidstempel
US4700601A (en) * 1986-04-28 1987-10-20 Velo Bind Inc. Punch pin head structure
JPS6434699A (en) * 1987-07-27 1989-02-06 Yoshio Mihashi Mounting hole of punch edge for perforator and fixture thereof
US4872381A (en) * 1988-07-13 1989-10-10 International Business Machines Corp. Programmable magnetic repulsion punching apparatus
JP2508102Y2 (ja) * 1990-05-14 1996-08-21 ユーエイチティー株式会社 穿孔装置
JP3474235B2 (ja) * 1993-09-29 2003-12-08 イビデン株式会社 貫通孔形成用金型の製造方法
JP3616821B2 (ja) * 1995-12-14 2005-02-02 Ｎｏｋ株式会社 挿入ガイド付カシメ装置
JP3305221B2 (ja) * 1995-12-25 2002-07-22 日本碍子株式会社 シート材の順送り加工装置
JPH1015896A (ja) * 1996-07-08 1998-01-20 U H T Kk パンチ
DE19855578C1 (de) * 1998-12-02 2000-09-21 Groz Beckert Kg Stanzeinrichtung mit wechselbaren Stempeln
JP2003094129A (ja) * 2001-09-25 2003-04-02 Musashi Seimitsu Ind Co Ltd ロッドの連結構造及びそのかしめ成形装置
JP2005224806A (ja) * 2004-02-10 2005-08-25 Misumi Group Inc パンチ装置

Also Published As

Publication number Publication date
JP2005349561A (ja) 2005-12-22
US7578224B2 (en) 2009-08-25
US20050274251A1 (en) 2005-12-15
DE202004009138U1 (de) 2004-08-12
DE502005000599D1 (de) 2007-05-31
KR20060048260A (ko) 2006-05-18
EP1604751A1 (de) 2005-12-14
JP4966516B2 (ja) 2012-07-04

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