EP0173042B1 - Dispositif emporte-pièces en particulier pour papier abrasif ou toile abrasive - Google Patents

Dispositif emporte-pièces en particulier pour papier abrasif ou toile abrasive Download PDF

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Publication number
EP0173042B1
EP0173042B1 EP85108701A EP85108701A EP0173042B1 EP 0173042 B1 EP0173042 B1 EP 0173042B1 EP 85108701 A EP85108701 A EP 85108701A EP 85108701 A EP85108701 A EP 85108701A EP 0173042 B1 EP0173042 B1 EP 0173042B1
Authority
EP
European Patent Office
Prior art keywords
punch
punches
folding axis
holding plate
die
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
Application number
EP85108701A
Other languages
German (de)
English (en)
Other versions
EP0173042A1 (fr
Inventor
Werner Heinzelmann
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.)
Mafell Maschinenfabrik Rudolf Mey GmbH and Co KG
Original Assignee
Mafell Maschinenfabrik Rudolf Mey GmbH and Co 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 Mafell Maschinenfabrik Rudolf Mey GmbH and Co KG filed Critical Mafell Maschinenfabrik Rudolf Mey GmbH and Co KG
Priority to AT85108701T priority Critical patent/ATE33783T1/de
Publication of EP0173042A1 publication Critical patent/EP0173042A1/fr
Application granted granted Critical
Publication of EP0173042B1 publication Critical patent/EP0173042B1/fr
Expired legal-status Critical Current

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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
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36—Punching or perforating pliers
    • 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
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/14—Punching tools; Punching dies

Definitions

  • the invention relates to a punching device, in particular for tape-like or foil-like material, preferably for sandpaper or sanding canvas, with an at least two punch stamps or the like Number of die parts provided with dies.
  • a punching device has become known from DE-A-2 306 221. It is equipped with a fixed number of dies that can be used as holes and can be equipped with a maximum number of punches corresponding to this number of dies.
  • the punches are detachable and can be attached to a tubular guide up to the maximum number. It is also possible to use only one punch, remove it after punching a hole, and then attach it to the next guide.
  • a material for example a sheet of paper, can basically only be provided with several holes one after the other, because the punches cannot be actuated together, but only individually.
  • the object of the invention is to develop a punching device according to the preamble of claim 1 so that with it a planned number of holes quickly, accurately and preferably also with as much as possible
  • a punching device in particular for tape and film-like material, preferably for sandpaper or sanding canvas with an at least two punch stamps or the like The like.
  • Corresponding number of dies provided with a die part engages in each die with a collapsed device, whereby in the case of a plurality of punches or the like which are at different distances from the folding axis, at least the cutting edges of the punches or the like which are further away from the folding axis.
  • This punching device enables, for example, the user of a grinding device with a suction device to cut off the grinding canvas or sandpaper required for this purpose from a roll and then to punch them himself.
  • the arrangement of the punch and dies of the device must correspond as closely as possible to the arrangement of the suction channel mouths on the grinding plate of the orbital sander.
  • the punch cross section must be at least substantially the same as the cross section of the suction channel mouth.
  • the punching takes place after the Insert the material by closing it. After opening, the punched sandpaper can be removed. Basically, it doesn't matter whether you move the dies against the punch or vice versa or swivel both parts. Expediently, however, the punched material or sanding paper is placed on the die part or the die ends on the die side, the die part resting on a solid base and the die part preferably being folded 180 ° against the die part. The latter can be formed relatively easily as a flat surface, so that a good support of the sanding paper is guaranteed.
  • a further development of the invention consists in that, in a punching device with circular punch cutting edges, the fold line on the fold axis side of each punch stamp tapering in the shape of a truncated cone forms at least a greater angle with the plane of the punch stamp holding plate than the fold axis distant coat line with this plane, whereby the angle of the surface line close to the folding axis with said plane is approximately 90 °.
  • the latter is moved on a circular arc due to the folding axis connection of the two device parts, so that when the cutting part near the folding axis is immersed in the die, the plane of the cutting edge forms an acute angle with the plane of the die.
  • the punch When folding further, the punch therefore needs the undercut mentioned on its region near the folding axis, which enables the further folding movement.
  • circular dies and stamps with a circular cutting edge can be used, so that the stamps can be manufactured, for example, as turned parts. This contributes significantly to the cheaper manufacture of this punching device. If you were to choose a circular cylindrical outer contour of the punch in the case of a circular punch die, the bore of the die would have to be oval or elliptical in order to enable mutual penetration during the folding movement.
  • the punches have the shape of a truncated cone with parallel, perpendicular to the central axis base surfaces and the contact surface on the punch holding plate runs inclined at least for the punch axis distant punch.
  • the desired oblique position for the drawing cut and the "undercut" required for the circular die holes are thereby achieved on the one hand.
  • the punches can now be designed as simple turned parts, in particular produced on an automatic machine, which are separated from the bar material by simple parting off.
  • the inclined support surfaces for at least a part of the punch are formed in a particularly advantageous manner by oblique, bead-like features in the punch holding plate. These characteristics can be applied, for example, in one operation with holes to attach the punch.
  • a further embodiment of the invention is characterized in that the forms are deeper with increasing distance from the folding axis and at least the inclined punch is the same height or length.
  • the matrices are moving closer and closer to a parallel position to the punch holding plate and thus also to the cutting edges of the punch. If the latter is of the same size for production-technical reasons, this could lead to the punch stamps remote from the folding axis already starting to work before the cutting axis closer to the folding axis have finished their cutting process. This would have the consequence that very many punchings are carried out at the same time, which requires a correspondingly high expenditure of force. To keep the latter as low as possible, you set the Punch stamps in different depths in the manner described.
  • a punch directly adjacent to the folding axis does not require an inclined punch cutting edge, because at the beginning of the cutting process, the die assumes a sufficient oblique position due to the relatively large angle between the two parts of the device, which makes a pulling cut, such as said, guaranteed even if the die edge runs parallel to the punch holding plate.
  • the inner punch is either made a little shorter or lower, or is set correspondingly deep in the punch holding plate.
  • the punches preferably have a sleeve-like shape, there being a fastening thread for a fastening screw in the inside of the sleeve which penetrates a corresponding hole in the punch holding plate.
  • a further variant of the invention is characterized by a stop for the material to be cut at the end of the stamping die part remote from the folding axis and a lateral guidance of the material to be cut, in particular on both parts of the device.
  • the material to be cut or the sandpaper sheet or the sandpaper section is pushed along the guide of the die part and subsequently that of the punch part into a flat, opened device until the front end in the direction of insertion has reached the stop of the punch part. If necessary, the sandpaper runs under a folding axis.
  • the lateral guidance of the stamping part can be somewhat narrower if the latter is folded in between the guide walls of the die part.
  • a tear-off edge in particular with teeth or the like, is provided on the end of the die part remote from the folding axis. This allows you to cut sections of roll goods to a precise size, which is defined by the distance of the stop from the tear-off edge.
  • punching the part of the sanding belt resting on the die part is first punched. This is usually about half of the sandpaper. If the other half should also be punched, pull out the sandpaper and push it back in a position rotated by 180 °. The punching device is then closed again and this then leads to the holes on the other half of the sanding paper being punched out.
  • the matrices are formed directly on the die part, in particular formed by circular punch openings, and thus on the one hand of the simplest type and on the other hand extremely inexpensive to manufacture.
  • the punching device consists essentially of the punch part 1 with the punch 2 to 8 and the die part 9 with the dies 10 to 16.
  • the two parts of the device are connected to one another via a folding axis 17, which is preferably in two parts and can consist of two rivets 18 and 19 which connect corresponding tabs 20 and 21 of the two device parts to one another.
  • Both the die part 9 and the stamping part 1 essentially consist of a flat plate with bent lateral edges.
  • the two lateral edges 22 and 23 form a guide for the punched material to be inserted into the opened device in the direction of arrow 24, in particular sandpaper.
  • the lateral edges 25 and 26 of the punch part which form a somewhat narrower second half of the guide, engage between these lateral edges 22 and 23.
  • the sanding paper is optionally pushed under an imaginary folding axis 17, which is not provided in the exemplary embodiment. It lies on the upward-facing surface 27 of the die plates 28 before punching.
  • the matrices consist of circular punchings, i.e. H. they are worked out directly from this die plate 28. Their arrangement is a mirror image of a plane passing through the folding axis 17 and extending perpendicular to the image plane in FIG. 2.
  • the punches 2 to 8 are manufactured separately and are exchangeably fastened to the punch holding plate 20 with the aid of fastening screws 29.
  • Each fastening screw penetrates a hole in the punch holding plate 30 and its thread engages in a nut thread 31 of the essentially sleeve-shaped punch.
  • the width of the punched material or sanding paper corresponds to the inner distance between the two lateral edges 25 and 26 of the
  • Stamping part 1 It is pushed into the device until its front end in the insertion direction hits the stop 32, which is formed by an angling of the end of the stamping plate holding plate 30, which end is in particular divided into two parts. This end consisting of two lobes is again turned in the opposite direction and thereby forms support plates 33 and 34 for the opened device, which at the same time handle when closing the device, i. H. when punching.
  • a tear-off edge 35 which is formed by a toothed or serrated transverse edge of this plate.
  • the inclined position is such that the cutting area 37 assigned to the folding axis 17 is at a greater distance from the plane of the punch holding plate than the cutting area 38 remote from the folding axis. This means that a pulling punch cut is achieved during cutting or punching.
  • the latter is illustrated by the dash-dotted representation 39 of the folded-up die plate 28, although in normal use the punch part 1 is pivoted in the direction of arrow 40 by approximately 180 ° against the die part 9.
  • there is an angle 41 between the two planes thereof which means that first the area near the fold axis is cut and then the cut along the cutting edge slowly pulls towards the area 38 away from the fold axis.
  • the stamping dies have a substantially frustoconical shape, the truncated cones standing upside down to a certain extent, i. H. the punches taper from their cutting edge 36 towards the punch holding plate 30.
  • the jacket line 42 close to the folding axis encloses a greater angle with the plane of the punch holding plate 30 than the jacket line 44 remote from the folding axis.
  • the former angle is somewhat less than 90 °. In this way, the die can be pivoted according to the dash-dotted lines 45 and 46 in spite of a circular cross-sectional shape relative to the punch against the arrow 40 without being obstructed by the cladding line 42 close to the folding axis.
  • the oblique position of the punch is achieved in a very advantageous manner by attaching oblique, bead-like features 47 to the attachment points of the punch holder plate 30 for the punches 2 to 8.
  • the oblique position can be seen from FIG. 1 and corresponds to that of the cutting edges 36.
  • the greatest depth 48 of these oblique features is the same for the punching dies 3 and 4 and 5 and 6 or 7 and 8, but the features for the punching dies 5 and 6 deeper than those for punches 3 and 4, while the features for punches 7 and 8 are deeper than those for punches 5 and 6. This is due to lines 49, 50 and 51 in FIG. 1 or their spacing symbolizes. It is achieved in this way that the punches 3 and 4 have finished their cutting process when the cutting process for the punches 5 and 6 begins. The same applies to the pairings of punches 5 and 6 with 7 and 8.
  • the punch 2 cuts, which cooperates with the die 10. It is shorter than the other stamps, which are the same height. Due to the lower height of the punch 2 compared to the punch 2 to 8 and due to the absence of an inclined position, a height distance 52 arises, which ensures that the cutting process only begins when a relatively small angle is enclosed by the two parts of the device. Nevertheless, the cutting process of the punch 2 is finished before working with the punch 3 and 4.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (9)

1. Dispositif de poinçonnage, notamment pour un matériau en banes ou en feuilles, de préférence du papier-émeri ou de la toile-émeri, comprenant une partie de poinçonnage (1) qui porte au moins deux poinçons (2 à 8), ainsi qu'une partie de matriçage (9) qui est reliée à la partie précitée, avec faculté de rabat, et est munie de matrices (10 à 16) de nombre correspondant à celui des poinçons, caractérisé par le fait que, lorsque ce dispositif est rabattu par pivotement, un poinçon respectif (2 à 8) s'engage dans chaque matrice (10 à 16) et, en présence de plusieurs poinçons éloignés de l'axe de rabat d'une distance différente, au moins les tranchants (36) des poinçons (3 à 8) davantage éloignés de l'axe de rabat s'étendent, par rapport au plan d'une plaque (30) de retenue des poinçons, avec une inclinaison telle que leur zone de découpe (37) associée à l'axe de rabat (17) est davantage éloignée, du plan de la plaque (30) de retenue des poinçons, que la zone de découpe (38) distante dudit axe de rabat; et par le fait que les poinçons (2 à 8) décroissent extérieurement de section, du tranchant (36) jusqu'à l'extrémité de fixation à la partie de poinçonnage (1).
2. Dispositif selon la revendication 1, dont les poinçons présentent des tranchants circulaires, caractérisé par le fait que la génératrice (42), située côté axe de rabat, de chaque poinçon (2 à 8) à décroissance de section tronconique faisant au moins partie des poinçons (3 à 8) davantage éloignés de l'axe de rabat forme, avec le plan de la plaque (30) de retenue des poinçons, un angle plus grand que celui formé, avec ce plan, par la génératrice (44) distante de l'axe de rabat, l'angle formé par la génératrice (42) proche de l'axe de rabat, avec le plan précité (30), mesurant environ 90°.
3. Dispositif selon la revendication 2, caractérisé par le fait que les poinçons (2 à 8) présentent la forme d'un tronc de cône à faces de base parallèles s'étendant perpendiculairement à l'axe médian (43), et la face de contact avec la plaque (30) de retenue des poinçons s'étend à chaque fois à l'oblique, au moins pour les poinçons (3 à 8) éloignés de l'axe de rabat.
4. Dispositif selon la revendication 3, caractérisé par le fait que les faces d'appui à étendue inclinée sont formées, pour au moins une partie (3 à 8) des poinçons (2 à 8), par des empreintes sortantes inclinées (47) du type moulures, ménagées dans la plaque (30) de retenue des poinçons.
5. Dispositif selon la revendication 4, caractérisé par le fait que les empreintes sortantes (47) augmentent de profondeur au fur et à mesure que la distance croît par rapport à l'axe de rabat (17), et au moins les poinçons (3 à 8) disposés à l'oblique sont respectivement de hauteurs ou de longueurs égales.
6. Dispositif selon au moins l'une des revendications précédentes, caractérisé par le fait que les poinçons (2 à 8) présentent une configuration du type douille, un taraudage de fixation (31) étant façonné à l'intérieur des douilles.
7. Dispositif selon au moins l'une des revendications précédentes, caractérisé par une butée (32) pour le matériau découpé, située à l'extrémité de la partie de poinçonnage (1) qui est éloignée de l'axe de rabat, et par un guide latéral (22, 23; 25, 26) pour le matériau découpé, ménagé en particulier sur les deux parties (1, 9) du dispositif.
8. Dispositif selon la revendication 7, caractérisé par une arête de déchirure (35), munie en particulier d'une denture ou configuration analogue, à l'extrémité de la partie de matriçage (9) qui est éloignée de l'axe de rabat. 9. Dispositif selon au moins l'une des revendications précédentes, caractérisé par le fait que les matrices (10 à 16) sont ménagées solidairement sur la partie de matriçage (9), et sont notamment formées par des évidements circulaires de poinçonnage.
EP85108701A 1984-08-23 1985-07-12 Dispositif emporte-pièces en particulier pour papier abrasif ou toile abrasive Expired EP0173042B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85108701T ATE33783T1 (de) 1984-08-23 1985-07-12 Stanzvorrichtung, insbesondere fuer schleifpapier oder schleifleinwand.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3430991 1984-08-23
DE3430991A DE3430991C2 (de) 1984-08-23 1984-08-23 Stanzvorrichtung für Schleifpapier oder Schleifleinwand

Publications (2)

Publication Number Publication Date
EP0173042A1 EP0173042A1 (fr) 1986-03-05
EP0173042B1 true EP0173042B1 (fr) 1988-04-27

Family

ID=6243698

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85108701A Expired EP0173042B1 (fr) 1984-08-23 1985-07-12 Dispositif emporte-pièces en particulier pour papier abrasif ou toile abrasive

Country Status (3)

Country Link
EP (1) EP0173042B1 (fr)
AT (1) ATE33783T1 (fr)
DE (1) DE3430991C2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218026A (en) * 1988-03-07 1989-11-08 Ashley Maxwell Grant Warden A hole punch
DE19856702A1 (de) * 1998-12-09 2000-06-21 Esselte Nv Stanzvorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT18814B (de) * 1903-05-25 1905-01-10 Alfred Brunner Aktenlocher.
FR490185A (fr) * 1918-04-17 1919-04-05 George Catherall Audsley Perfectionnements dans les outils à main pour détacher les coupons des cartes de rations
US2185005A (en) * 1938-10-20 1939-12-26 Safety Fastener Co Perforator
US2782856A (en) * 1953-09-30 1957-02-26 Staley Elizabeth Perforating device
US3525657A (en) * 1967-11-27 1970-08-25 Z Jana Svermy Device for repairing punch tape
DE1761581B2 (de) * 1968-06-11 1973-02-22 Leitz, Louis, 7000 Stuttgart Lochstempel fuer brieflocher
BE795141A (fr) * 1972-02-09 1973-05-29 Reliure Ind S T D Perforateur pour feuilles a perforer

Also Published As

Publication number Publication date
EP0173042A1 (fr) 1986-03-05
DE3430991C2 (de) 1995-06-22
DE3430991A1 (de) 1986-03-06
ATE33783T1 (de) 1988-05-15

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