EP2834026A1 - Ensemble poinçon et système pour la construction d'ensembles poinçon - Google Patents

Ensemble poinçon et système pour la construction d'ensembles poinçon

Info

Publication number
EP2834026A1
EP2834026A1 EP12772877.2A EP12772877A EP2834026A1 EP 2834026 A1 EP2834026 A1 EP 2834026A1 EP 12772877 A EP12772877 A EP 12772877A EP 2834026 A1 EP2834026 A1 EP 2834026A1
Authority
EP
European Patent Office
Prior art keywords
punch
unit according
holding
plate
stamp unit
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
EP12772877.2A
Other languages
German (de)
English (en)
Other versions
EP2834026B1 (fr
Inventor
Albrecht Schneider
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.)
Vanderpool Julia
Original Assignee
Vanderpool Julia
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 Vanderpool Julia filed Critical Vanderpool Julia
Publication of EP2834026A1 publication Critical patent/EP2834026A1/fr
Application granted granted Critical
Publication of EP2834026B1 publication Critical patent/EP2834026B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N6/00—Mounting boards; Sleeves Make-ready devices, e.g. underlays, overlays; Attaching by chemical means, e.g. vulcanising
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41K—STAMPS; STAMPING OR NUMBERING APPARATUS OR DEVICES
    • B41K1/00—Portable hand-operated devices without means for supporting or locating the articles to be stamped, i.e. hand stamps; Inking devices or other accessories therefor
    • B41K1/36—Details

Definitions

  • the present invention relates to a stamp unit for attachment to an upper part of a punch with a pressure plate, a punch and a punch plate.
  • stamp units are so far built exclusively in such a way that a Wegprofiled forming die is made over its entire length with its punched cross-section by cutting it out of a full hardened block over its entire length by means of wire EDM.
  • a common method of attaching the punch in the punch holding plate is to make a stamping die in the form of the punch with the desired circumferential hooking.
  • the upper end of the forming punch is then heated and the chamfer on the punch is upset by means of a press in the stamping mold.
  • the bevel of the upset head also serves to retract the punch, which occurs by the heating described the additional effect that as a result of the Anlass bines the hardness of the punch in the head area is reduced.
  • a unit made in this way is fastened to an upper part of a punching tool, for example by means of two screws, which is usually a column-guided standard. It can be installed in a tool several individual punch units when several desired breakthroughs are to be made.
  • the object of the present invention is to provide a punch unit whose production cost is reduced.
  • the pressure plate is disposed between the punch and the punch holder plate, wherein it acts on a punching stroke on a shoulder of the punch.
  • the solution according to the invention has the advantage that the length of the continuously profiled forming punch can be shortened by about 30%, whereby a considerable reduction in working hours also occurs.
  • the individual parts can also be releasably screwed together in the solution according to the invention, so that the upsetting and the production of an exact compression die for producing the punch are likewise eliminated, as is the grinding of the upset punch after insertion into the punch-holding plate.
  • Another advantage is that punches with different shape cross sections with standardized pressure plates and Stamp holding plates can be used, since they no longer need to be recessed in accordance with the profiling of the punch. It is even possible that the cross section of the punch is larger than the stamp receiving plate in some areas, so that multiple receiving plates can be avoided. For example, if the dimensions of a through-profiled forming die have to be changed, it is not necessary to change the punch receiving plate as well.
  • a holding shoe is provided which projects through a slot in the pressure plate and is secured in the punch holding plate.
  • the holding shoe is preferably made with certain dimensions, so that, as already indicated above, punch punches with different shape cross sections can be used together with standardized punch holding plates and pressure plates without problems whose openings are no longer adapted to the individual shape of the punch but the standardized holding shoe.
  • the holding shoe is arranged at a right angle to the shoulder.
  • the punch retaining plate on releasable fastening means which cooperate with corresponding fastening means on the holding shoe.
  • at least one bore can be provided in the holding shoe, into which a bolt engages. After loosening the Bol ⁇ Zen is in this embodiment, a simple ⁇ pull out the punch down from the receptacle for the Holding shoe in the punch plate and the pressure plate possible.
  • the standardized holding shoe also makes it possible to stock stamp blanks with a corresponding holding shoe and then, if necessary, to produce the desired shape of the punch in a very short time by simple wire erosion without any change to the mounting system of the punch in the stamp unit. It is only necessary to ensure that the cross-section of the shape comprises the retaining shoe reasonably uniformly, wherein the projection of the retaining shoe preferably always strikes the stamp cross-section and does not protrude laterally.
  • the bolts for attaching the holding shoe for example, have a threaded portion which is screwed into a threaded bore in the punch holder plate.
  • the bolt has a conical head which cooperates with a conical bore in the retaining shoe.
  • this can then pull the punch with his shoulder against the pressure plate, so that a play-free contact between the pressure plate and the shoulder of the punch is ensured.
  • the stamp unit has a hold-down, which is guided by means of guide pins resiliently on the pressure plate.
  • a hold-down is in the arrangement according to the invention tion of the elements of a stamp unit particularly easy to implement, since the hardened pressure plate can easily accommodate polished guide holes for the guide pin wear.
  • the guide pins may be bronze or coated hardened steel, to name but two examples.
  • a transverse web is provided in the slot of the punch holder plate for receiving the holding shoe of the punch.
  • This crosspiece which is in the range of a Passungsrachens the punch, increases the stability of the punch plate in the region of the slot, so that it can not come to dimensional changes due to the high forces acting by tightening the mounting bolts.
  • the slot in the punch-holding plate and the slot in the pressure plate are arranged offset eccentrically in alignment. Due to the asymmetrical arrangement of the pick-up tester for the punch shoe, very narrow punches can be positioned very close to one another, which can be an advantage for certain applications. Accordingly, the stamp units are then mounted with the sides of the lesser distance to the slots against each other in the tool.
  • the punch has an approach for a pull-out device for pulling in the punching direction.
  • the punches of the present system are installed after mounting the punch retainer plate to the end, after which the punch retainer plate is bolted and pinned, as the shoulder of the punch, depending on the design, obscures the bolt and pin holes after assembly.
  • the proposed approach provides a way to set a pull-out tool to selectively exert impact pulses on the punch, so that it dissolves from the punch unit.
  • the projection may have at least one blind or through bore lying transversely to the punching direction.
  • a punching punch with larger punching surfaces it is also possible in another preferred embodiment to provide a threaded bore in the punching surface which is aligned parallel to the punching direction.
  • the holes described above are axially in alignment with a fixation of the holding shoe, which is arranged centrally in the rule.
  • this adapter element can easily consist of an external thread possibly directly on the guide rod of the slide hammer, while a transversal bore a U-shaped adapter can be provided by means of a transverse bolt, the positive connection to the punch for introducing the Produces impact pulses.
  • the solution according to the invention allows standardized stamp holding plates and printing plates to be combined with stamping dies of different cross-sectional shape.
  • punch holding plates and printing plates can be kept in pairs in a few standard sizes, which can then be freely combined with the punches due to the standardized holding shoes.
  • Another advantage of the solution according to the invention is generally that it is possible to use punch holding plates and pressure plates whose cross section does not have to be substantially larger than the cross section of the punch.
  • a punch unit can be advantageous in which a single punch plate and / or a single pressure plate are provided for receiving a plurality of punch punches. Accordingly, such a punch plate and /. or pressure plate via a plurality of slots for receiving the respective holding shoe of a punch.
  • the slots can be arranged parallel or at an arbitrary angle to each other, so that it is possible to arrange a plurality of punches very space-saving in the tool.
  • Fig. 1 shows a punch unit according to the prior art in
  • FIG. 2 is an exploded diagram of the punch of FIG.
  • FIG. 3 is an exploded diagram of a stamp unit in FIG.
  • FIG. 4 shows a cross section of the stamp unit according to FIG. 3;
  • Fig. 5 shows a detail B of Fig. 4;
  • Fig. 6 is an oblique view of the punch
  • FIG. 7 is an oblique view of the punch holding plate
  • Fig. 8 is an oblique view of the printing plate; 9 shows a stamp unit in an oblique view with an additional hold-down device;
  • FIG. 10 shows an oblique view of a stamping punch with an extraction device
  • FIG. 11 is an oblique view of the punch of the stamp unit of FIG. 1;
  • FIG. 12 an oblique view of a further embodiment of a stamp unit with a correspondingly adapted pull-out device
  • Fig. 13 is a side view of the stamp unit and the extractor of Fig. 12;
  • FIG. 14 is a side perspective view of the punch of the stamp unit of FIGS. 12 and 13; FIG.
  • Fig. 15 is an exploded diagram of another embodiment of a stamp unit
  • 17 is an exploded diagram of a stamp unit with a plurality of punches.
  • a stamp unit 200 is shown in the prior art.
  • This stamp unit 200 consists essentially of a forming punch 202, a punch receiving plate 204 and a pressure plate 206, wherein the punch holding plate 204 is disposed between the pressure plate 206 and the punch 202.
  • the punching forces are transmitted through the pressure plate 206 to an upset head 208 (see FIG. 2) of the forming die 202, the pressure plate 206 being screwed to the punch holding plate 204 by countersunk screws 210.
  • the forming punch 202 is also secured by means of its upset head 208 against falling out of the punch holding plate 204, which has a chamfer 212 for this purpose.
  • FIG. 3 shows a stamp unit 10 in which a pressure plate 12 is arranged between a forming punch 14 and a punch holding plate 16.
  • the punching forces are transmitted from the punch plate 16 via the pressure plate 12 on the punch 14, wherein the contact between the pressure plate 12 and the punch 14 takes place in the region of a shoulder 18, which does not mark the rear end of the punch 14.
  • the shoulder 18 forms the head side of a shaped cross-section 20, wherein in the area the shoulder 18 as the rear end of the punch 14, a holding shoe 22 connects, which has a certain height relative to the shoulder 18 and a certain cross-section.
  • the projection of the holding shoe 22 should completely hit the shoulder 18, since the mold cross section 20 is otherwise very difficult to produce and possibly also strength problems in the transition region between the holding shoe 22 and the shoulder 18 may occur.
  • the shoulder 18 and the shoe are at right angles to each other.
  • the holding shoe 22 engages in a slot 24 (see FIG. 7) on the underside of the punch-holding plate 16.
  • holes 26 in the holding shoe 22 are aligned with holes 28 in the punch receiving plate 24, which are provided with an internal thread.
  • the intermediate pressure plate 12 is screwed to the punch holder plate 16.
  • the bolts 30 also allow the transmission of tensile forces, such as occur during a return movement after a punching stroke. These forces can be in the order of 10 to 15% of the actual punching forces, so that sufficient strength in the area of the screw connection must be taken into account.
  • the screw connection itself is illustrated in more detail in FIGS. 4 and 5.
  • the holding shoe 22 is shown in cross-section and it can be seen that the holes 26 run in the holding shoe 22 from the edge regions in each case conically towards the center. Accordingly, this hole cooperates with a threaded bolt 30, whose head is frustoconical.
  • a second threaded bolt 32 serves to secure the first threaded bolt 30 with the truncated cone head.
  • the solution shown makes it possible to use a plurality of punches 14 with very different shape cross sections with one and the same punch plate 16 and pressure plate 12 in combination.
  • the punch holder plate must, according to the preceding description, only have a slot 24 for receiving the holding shoe and fastening means which cooperate with the attachment means of the punch 14 executed in the example as simple bores 26.
  • the pressure plate itself need only be provided with a simple slot which is adapted to the cross-sectional shape of the holding shoe 22.
  • the guide or positioning of the punch 14 is taken over by the punch holder plate 16, so that at the slot 34 (see Fig. 8) in the pressure plate 12 no too great demands on accuracy must be made, which makes it possible, the pressure plate 12 to harden even after the production of the slot 34, which reduces the cost.
  • the punch unit shown makes it possible, for example, to keep blanks of punching dies 14 ready, which already have the finished holding shoe 22 on their upper side, but in the shank region have a round or square cutout. gene or rectangular cross-section, which allows the omission of a variety of forms. This can then be produced in a simple manner by wire EDM, which is readily possible due to lack of undercut.
  • Another great advantage of the solution shown is that the punch 14 can be removed without removing the punch unit 10 from the punching tool by the two fastening bolts 30, 32 are released.
  • FIG. 9 shows a preferred development of a stamp unit 110, which in turn has a stamp holding plate 116, a printing plate 112 and a punch 114. Also shown are the fastening bolts 30, 32, which are screwed into threaded bores 128 in the punch-holding plate 116 in order to cooperate with bores 126 on a holding shoe 122 of the punch 114 and fix it to the punch unit 110.
  • the stamp unit 110 shown in FIG. 9 has a hold-down 140 which is movably guided on the pressure plate 112 via guide bolts 144 and intermediate helical compression springs 142.
  • the pressure plate 112 which is arranged "below” and which has guide bores for the guide bolts 144 in the region of its four corners.
  • the guide bolts 144 themselves move in free bores 146 in the radial direction during compression. Pelhalteplatte 116.
  • the hold-down 140 serves the Niederhal ⁇ tion of the sheet during punching and after the actual
  • FIG. 10 shows the stamp unit 114 of FIG.
  • stamping side In this embodiment, the fastening bolts are replaced by corresponding fastening bolts 132 with laterally over the edge of the punch plate 116 protruding hexagonal heads 133, so that the bolts are accessible with a combination wrench even in tight gaps between adjacent punch units.
  • a punching surface 160 of the punch 114 axial threaded hole 162 into which an external thread 164 on a shaft 166 of a slide hammer 168 is screwed.
  • the threaded hole 162 is axially aligned with the position of a fixing pin (not shown) of the punch receiving plate, ie axially aligned a correspondingly formed Passagerachen 170 in the holding shoe 122 of the punch 114 (see also Fig. 11).
  • the threaded hole 162 allows the form-fitting fixing of the slide hammer 168 designed as extracting device, wherein by means of the movable hammer 172, which is movable against a stop 174, impact pulses are introduced into the punch 114, so that it can be solved, which may be necessary to disassemble the punch unit from the tool or nachzuschleifen to the punch in the event of stumping.
  • a transverse bore 362 (see FIG. 14) is provided in a punch 314 as a further embodiment for a projection for attaching a pull-out device, the transverse bore 362 again being in alignment with a dead-band 370 of the punch 314. From Fig. 12 and 13 can be clearly seen that the very narrow punch does not provide enough material to provide an internally threaded bore corresponding to Fig. 10 and 11.
  • the positive connection between the turn as a slide hammer 168 and the transverse bore 362 takes place here by means of a U-shaped adapter 280, wherein a screw 282 by aligned holes in the leg ends and the Transversal bore 362 produces the positive connection between the adapter 280 and the punch 314.
  • the adapter 280 is provided with a threaded bushing 284, in which the external thread 164 of the slide hammer can be screwed, so that the impulses exerted by the movable hammer 172 on the stop 174 pulses can be introduced into the punch for releasing it.
  • the design of the punch 314 shown in Fig. 14 is formed with a band 315, since due to the very slender punch shape without tape no sufficient shoulder surface would be available. In such a case, the punch can then be hard-milled or countersunk for the production, a stripping plate integrated in the punch unit similar to Fig. 9 is not possible in this form.
  • FIG. 15 shows a punch unit 410 with a punch holding plate 416, a pressure plate 412 and a punch 414.
  • This stamping unit broadly corresponds to the previously proposed punch units, so that a more detailed description of most details is omitted here.
  • the slot 424 in the punch retainer plate 416 is formed with a crosspiece 425 which increases the rigidity of the punch retainer plate in this area.
  • the crossbar 425 engages in the assembled state in the already provided Passungsrachen 470 of the punch. It has been found that can be reduced by the transverse web dimensional changes in the course of operation that can be play caused by the tightening of the fastening screws 432 and thus introduced into the punch plate forces ⁇ .
  • FIG. 16 another embodiment of a punch unit 510 is shown, in which a likewise provided with a cross bar 525 slot 524 in the punch holder plate 516 as well as an aligned slot 534 in the pressure plate 512 is arranged eccentrically offset from one edge.
  • a further punch unit 510 is shown, which is arranged back to back with the second punch unit 510.
  • the punches 514 of the units can be pressed closer together as a result and can be accommodated in the tool in a correspondingly space-saving manner.
  • the remaining details of the stamp units 510 need not be discussed in greater detail here, they will become apparent from the description of the preceding embodiments for those skilled in the drawing.
  • a stamp unit 610 which has a peculiarity of a punch holder plate 616 having receptacles for three punches 614a, 614b and 614c.
  • three slots 624a, 624b and 624c are provided, which in turn are each divided by a transverse web 625.
  • Escaping slots in the pressure plate 612, which is also integrally formed, are not recognizable, since the punch holding plate 616 and the pressure plate 612 are mounted together.
  • Such an embodiment makes it possible to accommodate three punches in a desired cross-sectional shape and in the desired orientation to each other very space-saving closely together in the tool.
  • Other combinations, for example, with two or four or more punch punches are of course readily possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Punching Or Piercing (AREA)
  • Forging (AREA)

Abstract

L'ensemble poinçon selon l'invention est fixé sur une partie supérieure d'un outil de découpe. Il présente un plateau de compression (12), une estampe (14) et un plateau de fixation (16) de poinçon. Pour diminuer les coûts de fabrication, selon l'invention, le plateau de compression (12) est disposé entre l'estampe (14) et le plateau de fixation du poinçon, le plateau de compression (12) agissant sur un épaulement (18) de l'estampe (14) lors d'une course de découpage.
EP12772877.2A 2012-04-03 2012-09-05 Ensemble poinçon et système pour la construction d'ensembles poinçon Not-in-force EP2834026B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012006665 2012-04-03
DE102012014698.1A DE102012014698B4 (de) 2012-04-03 2012-07-25 Stempeleinheit und System zum Aufbau von Stempeleinheiten
PCT/EP2012/003723 WO2013149630A1 (fr) 2012-04-03 2012-09-05 Ensemble poinçon et système pour la construction d'ensembles poinçon

Publications (2)

Publication Number Publication Date
EP2834026A1 true EP2834026A1 (fr) 2015-02-11
EP2834026B1 EP2834026B1 (fr) 2016-10-26

Family

ID=49209790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12772877.2A Not-in-force EP2834026B1 (fr) 2012-04-03 2012-09-05 Ensemble poinçon et système pour la construction d'ensembles poinçon

Country Status (5)

Country Link
US (1) US9579920B2 (fr)
EP (1) EP2834026B1 (fr)
JP (1) JP6063554B2 (fr)
DE (1) DE102012014698B4 (fr)
WO (1) WO2013149630A1 (fr)

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DE102012014698B4 (de) * 2012-04-03 2014-07-03 Julia Vanderpool Stempeleinheit und System zum Aufbau von Stempeleinheiten
DE102012025300A1 (de) 2012-12-28 2014-07-03 Julia Vanderpool Verstellbare Stempelaufnahme
CN104552451B (zh) * 2015-01-04 2017-04-26 京东方科技集团股份有限公司 一种裁切装置
US9878461B2 (en) * 2015-05-14 2018-01-30 Omnitool, Inc. Rigid punch tool
CN108942306B (zh) * 2018-08-23 2021-01-08 四川福蓉科技股份公司 一种蘑菇头夹具
CN110216192B (zh) * 2019-05-28 2024-06-07 东莞智富五金制品有限公司 一种快速换模的冲压装置

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Also Published As

Publication number Publication date
EP2834026B1 (fr) 2016-10-26
DE102012014698B4 (de) 2014-07-03
US20150047521A1 (en) 2015-02-19
WO2013149630A1 (fr) 2013-10-10
JP6063554B2 (ja) 2017-01-18
JP2015512344A (ja) 2015-04-27
US9579920B2 (en) 2017-02-28
WO2013149630A8 (fr) 2014-10-02
DE102012014698A1 (de) 2013-10-10

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