US3566665A - Sheet metal forming press for forming flattened horns on the edges of sheet metal blanks - Google Patents

Sheet metal forming press for forming flattened horns on the edges of sheet metal blanks Download PDF

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Publication number
US3566665A
US3566665A US721467A US3566665DA US3566665A US 3566665 A US3566665 A US 3566665A US 721467 A US721467 A US 721467A US 3566665D A US3566665D A US 3566665DA US 3566665 A US3566665 A US 3566665A
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US
United States
Prior art keywords
sheet metal
forming
die
bolster
horns
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
Application number
US721467A
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English (en)
Inventor
Joseph Birrer
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.)
Haemmerle AG Maschinenfabrik
Original Assignee
Haemmerle AG Maschinenfabrik
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 Haemmerle AG Maschinenfabrik filed Critical Haemmerle AG Maschinenfabrik
Application granted granted Critical
Publication of US3566665A publication Critical patent/US3566665A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder

Definitions

  • This invention relates to a sheet metal forming press for forming flattened horns on the edges of sheet metal blanks.
  • the present invention provides a sheet metal forming press for forming flattened horns on the edges of sheet metal blanks, which comprises a bolster mounted between centering springs permitting the bolster to yield in a direction normal to the direction of pressing; a vertically movable die adapted to be lifted oif and lowered onto said bolster, and a vertically movable forming punch cooperating with said die.
  • the die may be vertically movably mounted near each of its ends between lateral guideways and associated with rams for optionally lifting the die off the bolster or lowerin g the die onto the bolster.
  • FIG. 1 is a schematic representation of an arrangement proposed by the invention whilst performing a first operation
  • FIG. 2 is a similar view showing the same arrangement whilst performing a second operation
  • FIG. 3 is a front elevation of the arrangement
  • FIG. 4 is a vertical section of the arrangement according to FIG. 3, and
  • FIG. 5 is a vertical section of a modified arrangement according to the invention.
  • the press comprises a baseplate 1 which is pro- 3,566,665 Patented Mar. 2, 1971 vided with a recess 2 for the reception therein of a bolster 3.
  • the bolster 3 is horizontally movable in the recess 2 but is urged into central position in the recess 2 by centering springs 4.
  • Above the bolster 3 a die 5 is vertically movably mounted and can be lowered to rest on the bolster 3.
  • a V-slot 6 in the upper surface of the die 5 serves for forming a horn on the edge of a sheet metal blank.
  • the die 5 cooperates with a forming punch 7.
  • FIG. 1 shows the forming punch 7 having descended into the V-slot 6 to form a horn on the edge of a sheet metal blank 8.
  • the die 5 When the forming punch 7 has been raised and the sheet metal blank 8 removed from the V-slot 6 the die 5 is lifted off the bolster 3 and the horned edge of the sheet metal blank 8 is placed on the bolster 3 with the horn pointing upwards, the free edge 9 of the horn engaging the underside 10 of the die 5.
  • the underside 10 of the die 5 now functions as a pressplate when the forming punch 7 de cends into the empty V-slot 6 and thus forces the die 5 downwards onto the bolster 3.
  • the bolster 3 yields laterally to the right in FIG. 2 and thus permits the horn to be flattened down on the surface of the sheet metal blank 8.
  • the bolster 3 were unable laterally to yield, the horn could not be pressed flat because the upper edge9 of the horn catches on the underside 10 of the die 5 whereas it should be free to describe an are 11 of a circle whilst being pressed onto the surface of the sheet metal blank 8.
  • a rigidly fixed bolster 3 would have the effect of subjecting the die 5, which is guided exclusively at its two ends, to such considerable lateral strain that in practice the horn could not be properly closed.
  • the ability of the bolster 3 to yield by compressing the centering spring 4 permits the horn to be flattened down against the surface of the sheet metal blank 8 without the application of unduly high pressure.
  • FIGS. 3, 4 and 5 Practical embodiments of the press proposed by the invention are illustratively shown in FIGS. 3, 4 and 5.
  • a baseplate which in these drawings is indicated by the reference numeral 12, carries a bolster 13 which is horizontally movable between centering springs 14 provided for holding the bolster 13 in the illustrated central position.
  • a die 15 is vertically movably mounted in laterally spaced guideways provided in portal-shaped supports 16 near each end of the die 15. The ends of the die 15 projecting from the guiding supports rest on the rams 17 of two pneumatically operable ram cylinders 18 (FIGS. 3 and 4) which may stand on the base or on separate foundations on the floor (FIG. 5). Compressed air can be admitted into each cylinder 18 through an opening 19.
  • Each ram 17 has a spherical head 20 which bears against a cooperating socket-shaped surface in the end of the die 15.
  • a forming punch 22 is adapted to descend into the V-slot 21 of the die 15 from above.
  • the forming punch 22 is slidably mounted in ways not shown in the drawings and can be lowered and raised by conventional means.
  • the described arrangement permits sheet metal blanks to be provided with flattened horns in two operations without the need of remounting or changing the tools.
  • the proposed machine therefore saves labour and time.
  • a sheet metal forming press for forming flattened horns on the edges of sheet metal blanks, comprising:
  • a sheet metal forming press according to claim 1, wherein the die is vertically movably mounted near each of its ends between laterally spaced guideways and associated with ra-ms for optionally lifting the die oh. the bolster 0r lowering the die onto the bolster.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US721467A 1967-04-21 1968-04-15 Sheet metal forming press for forming flattened horns on the edges of sheet metal blanks Expired - Lifetime US3566665A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT377667A AT268007B (de) 1967-04-21 1967-04-21 Blechbearbeitungseinrichtung zum Herstellen von flachgedrückten Spitzbügen

Publications (1)

Publication Number Publication Date
US3566665A true US3566665A (en) 1971-03-02

Family

ID=3555267

Family Applications (1)

Application Number Title Priority Date Filing Date
US721467A Expired - Lifetime US3566665A (en) 1967-04-21 1968-04-15 Sheet metal forming press for forming flattened horns on the edges of sheet metal blanks

Country Status (6)

Country Link
US (1) US3566665A (de)
AT (1) AT268007B (de)
CH (1) CH462757A (de)
FR (1) FR1561658A (de)
GB (1) GB1165305A (de)
SE (1) SE331829B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6098440A (en) * 1997-12-19 2000-08-08 Thyssen Krupp Ag Device for hemming of sheet metals particularly of coachwork sheet metals for small-lot production series in automobile manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2737429B1 (fr) * 1995-07-31 1997-11-28 St Mathurin Soc Civ Panneau metallique, notamment lame de persienne, forme d'une partie centrale plane et de bordures en surepaisseur, obtenues en une seule piece par pliage d'une tole

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6098440A (en) * 1997-12-19 2000-08-08 Thyssen Krupp Ag Device for hemming of sheet metals particularly of coachwork sheet metals for small-lot production series in automobile manufacture

Also Published As

Publication number Publication date
CH462757A (de) 1968-09-30
AT268007B (de) 1969-01-27
GB1165305A (en) 1969-09-24
SE331829B (de) 1971-01-18
FR1561658A (de) 1969-03-28
DE1752183A1 (de) 1971-11-04

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