US3332275A - Die for metal stamping machine - Google Patents

Die for metal stamping machine Download PDF

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Publication number
US3332275A
US3332275A US396972A US39697264A US3332275A US 3332275 A US3332275 A US 3332275A US 396972 A US396972 A US 396972A US 39697264 A US39697264 A US 39697264A US 3332275 A US3332275 A US 3332275A
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United States
Prior art keywords
die
punch
members
stamping machine
die cavity
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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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US396972A
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English (en)
Inventor
Bulmer Harris Elliott
Cook George James
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Individual
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Individual
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Filing date
Publication date
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Publication of US3332275A publication Critical patent/US3332275A/en
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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/10—Die sets; Pillar guides

Definitions

  • the present invention relates to a stamping machine and in particular to a die for use in a metal stamping machine.
  • the stamping of sheet metal involves the use of a male punch and a female die.
  • the metal to be stamped is placed between the punch and die and then the punch is lowered into the die to impart to the sheet of material the desired configuration.
  • the punch and die be constructed so that they have an exact shape and clearance relative to each other.
  • stamping sheet material it is essential that the sheets being stamped be of the same thickness and the punch and die be accurately aligned in order to prevent wear on the faces of punch and die.
  • the present invention relates to a die for use in a stamping machine including a punch, said die comprising at least two aligned and cooperating die members each having a facing surface; said surfaces defining at least a part of a die cavity of predetermined size and configuration; elastic material asssociated with each said die member and located remote from said facing; and a member adapted to retain said die members and elastic material in co-operating relationship; the arrangement being such that, upon misalignment of said punch with respect to said die cavity, the elasticity of said material will permit said die cavity to compensate for such misalignment.
  • FIGURE 1 is a plan view showing one embodiment of the invention
  • FIGURE 2 is a cross section taken along line IIII of FIGURE 1;
  • FIGURE 3 is a plan view showing a second embodiment of the invention.
  • FIGURE 4 is a cross section taken along line IIIIII of FIGURE 3.
  • the die generally indicated at 1, includes a pair of aligned die members 3 and 5 each having a facing surface 6 defining a die cavity 4.
  • elastic material 7 preferably an elastomer, is bonded to the edge of the die members 3 and 5.
  • the die members 3 and 5 and the elastic material 7 are retained in co-operating relationship by retainer plates 9'.
  • a punch (not shown) is located above the die 1 and a sheet of material, e.g. sheet metal, is placed between the punch and die 1.
  • the punch is lowered into the die cavity 4 to impart to the sheet of material, the desired shape defined by the face of the punch and the die members 3 and 5.
  • the elastic material 7 will permit the die cavity 4 to compensate for the misalignment, i.e. one or both of the die members 3 and 5 is pressed against the elastic material 7 so that the die cavity 4 assumes the desired shape.
  • the die members 3 and 5 have sufi'icient play to permit the stamping of sheet material when the punch and die are misaligned, or when the thickness of the sheet of material varies throughout its area.
  • FIGURES 3 and 4 of the drawings includes die members 13 and 15, each having a facing surface 16, which surfaces define die cavity 14.
  • An elastic material 17, preferably an elastomer, is bonded to the edge 18 of the die members 13 and 15.
  • Retainer plates 19 and 21 retain the die members 13 and 15 and the elastic material 17 in co-operating relationship.
  • Each die member 13 and 15 forms a single unit with the elastic material 17 and retainer plates 19 and 21 respectively.
  • the units are mounted on a base plate 23 by means of screws 25 which pass through bores 27 in the retainer plates 19 and 21, and into aligned threaded bores 31, 33, 35 or 37 in the base plate 23.
  • the die members 15 and 17 can be spaced various distances apart to vary the size of the die cavity 14 to accommodate a variety of punch sizes.
  • the elastic material 7 or 17 can assume vanous configurations and can be of any desirable thickness depending on the amount of play required in the die facings.
  • the elastic material is bonded directly to the die members, but various other means for maintaining the elastic material in position can be employed.
  • the die members would have to be heat treated after being fitted to the punch.
  • the steel facings cannot be pre-bonded to the elastomer, but could be connected to the elastomer by means of dowels.
  • a die for use in a metal stamping machine including a punch, said die comprising at least two aligned and cooperating die members each having a surface facing the other die member; said surfaces defining opposite surfaces of a die cavity of predetermined size and configuration; elastomeric material associated with each said die member and located remote from said surfaces; and a member adapted to retain said die members and said elastomeric material in co-operating relationship; the arrangement 3 4 being such that, upon misalignment of said punch with References Cited respect to said die cavity, the elasticity of said elastomeric UNITED STATES PATENTS material will permit said die cavity to compensate for such misalignment. 353,188 11/1886 White 72- 68 2.
  • a die according to claim 1 including means for 5 627557 6/1899 Whlte 72-468 varying the size of said die cavity to accommodate dif- 5/1948 Qlney 72468 ferent sized punches.
  • FOREIGN PATENTS 3 A die according to claim 2 wherein said elastomeric 887,918 8/1943 France.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
US396972A 1964-06-04 1964-09-16 Die for metal stamping machine Expired - Lifetime US3332275A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA904354 1964-06-04

Publications (1)

Publication Number Publication Date
US3332275A true US3332275A (en) 1967-07-25

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ID=4142008

Family Applications (1)

Application Number Title Priority Date Filing Date
US396972A Expired - Lifetime US3332275A (en) 1964-06-04 1964-09-16 Die for metal stamping machine

Country Status (4)

Country Link
US (1) US3332275A (en)van)
BE (1) BE657568A (en)van)
GB (1) GB1082839A (en)van)
NL (1) NL6414929A (en)van)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US353188A (en) * 1886-11-23 Device for drawing metal
US627557A (en) * 1898-04-26 1899-06-27 George H Clowes Drawing-die.
FR887918A (fr) * 1941-12-04 1943-11-26 Weser Flugzeugbau G M B H Procédé de fabrication d'un outil servant au découpage de pièces de tôle
US2440809A (en) * 1944-03-04 1948-05-04 Western Electric Co Material forming die

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US353188A (en) * 1886-11-23 Device for drawing metal
US627557A (en) * 1898-04-26 1899-06-27 George H Clowes Drawing-die.
FR887918A (fr) * 1941-12-04 1943-11-26 Weser Flugzeugbau G M B H Procédé de fabrication d'un outil servant au découpage de pièces de tôle
US2440809A (en) * 1944-03-04 1948-05-04 Western Electric Co Material forming die

Also Published As

Publication number Publication date
GB1082839A (en) 1967-09-13
BE657568A (en)van)
NL6414929A (en)van) 1965-12-06

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