US3183757A - Card punching dies - Google Patents

Card punching dies Download PDF

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Publication number
US3183757A
US3183757A US178797A US17879762A US3183757A US 3183757 A US3183757 A US 3183757A US 178797 A US178797 A US 178797A US 17879762 A US17879762 A US 17879762A US 3183757 A US3183757 A US 3183757A
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United States
Prior art keywords
holes
bars
steel bars
punching
grid
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 - Lifetime
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US178797A
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English (en)
Inventor
Sorensen Villy Frank
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Individual
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Individual
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    • 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
    • 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
    • Y10T83/9437—Shear-type female 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
    • Y10T83/944—Multiple punchings

Definitions

  • Punching dies for the purpose in question usually consist of a cutting plate and two guiding plates, and constructions are known in which both the cutting plate and each of the two guide plates are composed of a plurality of thin laminae or sheets in which the number of rows of holes required for the die in question are punched, the said thin sheets being assembled by riveting to form a laminated plate of sufiicient thickness.
  • the two guide plates of the die serve to guide the punches or needles which in co-operation with the third platethe cutting plate-serve to punch the holes in the cards.
  • a punching die element for use in the punching of rectangular holes in punched cards which die element may be used either as a guide plate or as a cutting plate, comprises a plurality of first steel bars of rectangular cross section placed side by side at a mutual spacing to form a grid, a plurality of grooves extending side by side transversely of said steel bars across at least one face of said grid, a second surface ground steel bar being press fitted in each of said grooves, the outer faces of said second bars and the adjoining faces of said first bars being surface ground in a common grinding operation to form a smooth grid face.
  • Such a punching die may easily be made with such accuracy that the holes formed in the die between the bars will be located at absolute equal mutual distances and will be absolutely identical in shape and size. Consequently, the punches to be used in combination with the die may be ground to precisely equal cross sectional dimensions whereby the time consuming manual adaptation of each punch to its corresponding hole is eliminated.
  • the punching die according to the invention is very strong, because the principal or first bars may be made from wear resistant steel of the highest grade, and the second bars may be made from tempered band steel. Since each of these second steel bars extend through the whole width of the cutting tool, no notch effect may occur and the narrow strips between the columns of holes will therefore be very strong, and cannot possibly be ruptured in normal operation.
  • the whole of the cutting plate may be surface ground until the cutting edges are again sharp and full square. This surface grinding may be repeated many times since the second steel bars may be made relatively high.
  • first and second steel bars may advantageously be different in the case of a multi-column die and a single column die respectively.
  • said first steel bars may suitably be located at a mutual spacing corresponding to the length of the longitudinal edges of the holes to be punched while said second steel bars have a width corresponding to the distance between the columns of holes and are located at a mutual spacing corresponding to the length of the transverse edges of the holes to be punched.
  • this may, according to the invention, suitably comprise two first steel bars located at a mutual spacing corresponding to the length of the transverse edges of the holes to be punched, and, for each hole of the column, two second steel bars at a mutual spacing corresponding to the length of the longitudinal edges of the holes.
  • a punching die made from elements of the type specified may in known manner comprise two guiding plates and one cutting plate, and, according to the invention, each of these plates may consist of a die element of the type specified.
  • a single guide plate may be used, according to the inven tion, instead of two guide plates, in which case the die element constituting the said guide plate will be provided with second steel bars on both sides thereof.
  • FIG. 1 shows one form of a niulti-colurnn punching die element according to the invention, in side View, partly in section,
  • FIGS. 2 and 3 plan views of the same as seen from one and the other side respectively
  • FIG. 4 one form of a single column punching die element according to the invention, in plan View, and
  • FIG. 5 a punching die composed of two elements of the type illustrated in FIG. 4, in side View.
  • the punching die element illustrated in FIGS. 13 is composed of a plurality of steel bars 1 of rectangular cross section which together with intervening spacing members 2, likewise from steel, are assembled by means of bolts 3 to form a grid, as illustrated in 1 16.2.
  • the spacing members 2 may be omitted if the steel bars 1 are held in 3 accurate positions in a jig during the further operations to be described in the following".
  • a plurality 6f miitually parallel grooves 4, FIG. 3 are cut, cg. by means of a tiiilling cutter,- the said grooves extending across all of the bars 1 and peiietfating into the latter to a predetermined depth.
  • a steel bar 5, FIG; 3,- is then fitted into each of the grooves 4, these steel bars extending along the whole length of the grooves as illustrated in the portion of the plate above the breaking line a in FIG. 3.
  • the dimensions of these steel bars are so selected that they are received in the grooves 4 at a press fit so that they are firmly held therei'r'i.
  • the composite workpiece is then surface ground whereby the outer edges of the bars 5 and the adjoining outer edges of all of the steel bars 1 will be accurately located in a common plane or in other words, the surface of the grid formed by the two systems of bars will be smooth. By this surface grind ing, the surface of the composite workpiece assumes the appearance illustrated in FIG. 3, i.e.
  • the finished plate exhibits a plurality of rows of holes in the embodiment slidwrl 14 rows of holes, each comprising ten holes 6.
  • two steel end members 9 are also provided which are constructed with guiding holesf7 for receiving a guiding pin, and also with holes 8 for.
  • the cutting plate of a die may consist of a single element of the type described while the guiding plate may be composed of two such elements whichare then assembled in such a manner that the faces of the two elements in which the holes 6 are provided, are remote from one another. These holes serve to receive and guide punches or cutting needles of a Well known kind, not illustrated in the drawings.
  • the side of the element accdrding to the invention remote from the holes 6 has a number of open slits, corresponding to the iiui'nbsf of rows of holes, for the passage of the punches.
  • the single column punching die element illustrated in FIGS. 4 and 5 is composed of two steel bars 11 extending in the direction of the longitudinal edges of the holes to be punched and a plurality of steel bars 15 extending in the direction of the transverse edges of the holes. Since it would be inconvenient and result in an unnecessary great consumption of material to give the bars 15 the same width as the distance between the two holes of the row of holes, a thin bar is instead used at each end of each hole so that additional holes are formed between those used for the punching, which additional holes are of no the type illustrated in FIG. 4 with steel bars 15 fitted into both sides of the steel bars 11.
  • This construction may also be used for a multi-column punching die composed of elements of the type illustrated in FIGS. 1-3.
  • a punching die element for use in the punching of rectangular. holes in punched cards, comprising a plurality of first steel bars of rectangular cross section each forming in itself a complete and independent element, .said first steel bars being placed side by side at a mutual spacing to from a grid, a plurality of grooves extending side by side transversely of said steel bars across at least'one face of said grid, a second surface ground steel bar ,rsavsr forming in itself a complete and independent element and havingv a height equal to the depth of said grooves being press fitted in each of said grooves, the outer faces of said second bars and the adjoining faces of said first bar being surface ground in a common grinding operation to form a smooth grid face.
  • a multi-column punching die element for use in the punching of rectangular holes in punched cards, comprising a plurality of first steel bars of rectangular cross section placed side by side at a mutual spacing-corresponding to the lengthof the longitudinal edges of the holes to be punched, to form a grid, a plurality of grooves extending side by side transversely of said steel bars across at least one face of said grid, a second surface ground steel bar being press fitted in each of said grooves, said second steel bars having a Width corresponding to the distance between the columns of holes and being located at a mutual spacing corresponding to the length of the transverse edges of the holes to be punched, the outer faces of said second bars and the adjoining faces of said first bars being surface ground in a common grinding operation to form a smooth grid face.
  • a single column punching die element for use in the punchingof rectangular holes in punched cards comprising twd first steel bars located in parallel relationship at a mutual spacing corresponding to the length of the transverse edges of the holes to be punched, a plurality of grooves extending side by side transversely of said steel bars across at least one face thereof, a second surface ground steel bar being press fitted in each of said grooves, said second steel bars comprising, for each hole of the column, two bars at a mutual spacing corresponding to the length of the longitudinal edges of the holes, the outer faces of said second bars and the adjoining faces of said firstbars being surface ground in a common grinding operation to form a-smooth grid face.
  • a me'thdd of making a punching die element for use in the punching of rectangular holes in punched cards comprising the steps of (l) aligning a plurality of first steel bars of rectangular cross section and having a plurality of side by side grooves extending transversely across one face wherein the grooves are in registration in a plurality of lines, (2) press fitting a second plurality of steel bars into the line of grooves to form a grid defining a plurality of rectangular dies, and (3) surface grinding the grid to form a smooth grid face, whereby the dies are precisely formed to receive mating punches of standard 7 dimensions.
  • a plane parallel honing machine may be grid face.
US178797A 1961-03-13 1962-03-12 Card punching dies Expired - Lifetime US3183757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK106361AA DK94913C (da) 1961-03-13 1961-03-13 Matriceemne til brug ved gennemhulning af hulkort med rektangulære huller.

Publications (1)

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US3183757A true US3183757A (en) 1965-05-18

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US178797A Expired - Lifetime US3183757A (en) 1961-03-13 1962-03-12 Card punching dies

Country Status (7)

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US (1) US3183757A (xx)
BE (1) BE614973A (xx)
CH (1) CH402478A (xx)
DE (1) DE1235637B (xx)
DK (1) DK94913C (xx)
GB (1) GB927784A (xx)
NL (1) NL275866A (xx)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334809A (en) * 1964-07-13 1967-08-08 Vyzk Ustav Matemat Stroju High-speed operated apparatus for punching recording tape
US3392617A (en) * 1966-03-02 1968-07-16 Henn Harry Walther Punch assembly for perforating materials
CN103436642A (zh) * 2013-01-07 2013-12-11 张琴中 一种针板
CN104786275A (zh) * 2015-04-27 2015-07-22 惠州美锐电子科技有限公司 一种pcb冲压底模

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422039A (en) * 1890-02-25 Cutter for cracker-machines
US2165008A (en) * 1933-01-14 1939-07-04 Rosenberg Heyman Die
US2913049A (en) * 1959-05-25 1959-11-17 Vip Inc Card punching device
US3100411A (en) * 1959-04-22 1963-08-13 Carrick Prec Tools Ltd Press tools

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1835424A (en) * 1930-06-07 1931-12-08 Tabulating Machine Co Punch die
DE854116C (de) * 1949-10-25 1952-10-30 Hermann Kaiser Locheinrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422039A (en) * 1890-02-25 Cutter for cracker-machines
US2165008A (en) * 1933-01-14 1939-07-04 Rosenberg Heyman Die
US3100411A (en) * 1959-04-22 1963-08-13 Carrick Prec Tools Ltd Press tools
US2913049A (en) * 1959-05-25 1959-11-17 Vip Inc Card punching device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3334809A (en) * 1964-07-13 1967-08-08 Vyzk Ustav Matemat Stroju High-speed operated apparatus for punching recording tape
US3392617A (en) * 1966-03-02 1968-07-16 Henn Harry Walther Punch assembly for perforating materials
CN103436642A (zh) * 2013-01-07 2013-12-11 张琴中 一种针板
CN104786275A (zh) * 2015-04-27 2015-07-22 惠州美锐电子科技有限公司 一种pcb冲压底模

Also Published As

Publication number Publication date
DE1235637B (de) 1967-03-02
CH402478A (de) 1965-11-15
BE614973A (fr) 1962-07-02
NL275866A (xx) 1900-01-01
DK94913C (da) 1962-12-03
GB927784A (en) 1963-06-06

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