US3675458A - Hydraulic section-stretching machine - Google Patents

Hydraulic section-stretching machine Download PDF

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Publication number
US3675458A
US3675458A US4307A US3675458DA US3675458A US 3675458 A US3675458 A US 3675458A US 4307 A US4307 A US 4307A US 3675458D A US3675458D A US 3675458DA US 3675458 A US3675458 A US 3675458A
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United States
Prior art keywords
grip
stretching
counter
section
clamping
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Expired - Lifetime
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US4307A
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English (en)
Inventor
Dieter Veltjens
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Schloemann AG
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Schloemann AG
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Publication date
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    • 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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/12—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by stretching with or without twisting

Definitions

  • This invention relates to a hydraulic section-stretching machine provided with a cylinder and piston co-operating with a stretching grip, and with a longitudinally movable counter-grip capable of being arrested, with the gripping jaws of the counter-grip being operative perpendicularly to the section-stretching axis.
  • the object of the present invention is to construct a sectionstretching machine in such a way that the sections accruing from one size of billet, when extruded through the same die, but partly with different lengths, can be racked, and, if need be, untwisted without displacing the counter-grip.
  • the sections can then be transported to the section-stretching machine, racked and removed from the machine on a liveroller delivery table, in the same direction as the feed, perpendicularly to the stretching axis.
  • this aim is attained by providing a thrust beam, a stretching grip fixedly mounted on the thrust beam, a cylinder and piston mounted on the thrust beam and cooperating with the stretching grip, a counter-grip longitudinally movable along the thrust beam, the counter-grip and stretching grip defining a stretching axis and cooperating to grip a section to be stretched, and the counter-grip comprising means for arresting the movement of the counter-grip along the thrust beam, a C-shaped support constituted by a vertical portion and upper and lower horizontal portions, a clamping jaw carried by each of the horizontal portions, the horizontal portions and clamping jaws providing a first aperture which is open towards the stretching grip and a second aperture in the same plane but facing at right angles thereto towards the stretched section to be transported, one of the clamping jaws being movable perpendicularly to the stretching axis of a section secured by one end to the stretching grip and clamped towards the other end by the counter-grip, the vertical portion of the C-shaped support being located entirely
  • a shearing device with upper and lower blades is provided on the counter-grip as a severing means, and the upper edge of the lower blade and the upper edge of the lower clamping jaw are arranged sta' tionarily at the same level on the counter-grip.
  • the upper clamping jaw is secured to a clamping cylinder and the upper shear blade is secured to a shearing cylinder which is movable on the counter-grip, the shearing cylinder being slidably guided on the clamping cylinder.
  • the invention makes it possible to clamp and stretch material of different lengths without loss of time, the pieces of the stretch material that project beyond the severing means being severed either at the time of stretching or immediately thereafier.
  • An advantage here resides in the fact that the upper clamping jaw carries out two functions at the same time, namely first it clamps the stretch material, and secondly, during or after the stretching operation, it serves as a holdingdown means for the material to be severed immediately beside it.
  • the racked stretch material provided in this way in a unitary length can be transported away from the stretching machine without further loss of time without change of direction from the direction of supply to the stretching machine, perpendicularly to the stretching axis, upon a live-roller delivery table.
  • FIG. 1 is a side view of a section-stretching machine with stretching grip and counter-grip, in which an untwisting means is also provided on the stretching grip;
  • FIG. 2 shows on a larger scale a longitudinal section through the counter-grip in an axial direction
  • FIG. 3 is a view taken along line Ill-Ill in FIG. 2, the view looking in the direction of the arrows;
  • FIG. 4 is a plan view of the counter-grip.
  • a thrust beam constructed as a frame I of the nature of a joist or double-T girder, which, on the basis of the design, takes up the bending moments arising in the machine during the stretching operation, carries a stretching grip 2, which, coupled to an untwisting means 3 for the sections, co-operates by way of a stretching piston 4, with a stretching cylinder 5.
  • the stretching cylinder 5 is fixedly connected with the frame 1 by way of a bracket 6.
  • the stretching grip 2 slides, with the casing of the untwistlng means 3, along the frame 1.
  • a counter-grip denoted generally 7, axially displaceable along the frame, on wheels 8, and arrestable on the frame 1 by clamping means 9.
  • the counter-grip 7 includes a C-shaped support or yoke constituted by a vertical portion 7a and upper and lower horizontal portions 7b and 7c providing a first aperture 10 which is open towards the stretching grip 2 and a second aperture 11 which faces towards stretch material 12 to be transported.
  • An upper clamping jaw 13 is mounted in the horizontal portion 7b of the support and is fixedly connected with a clamping cylinder 14, which, by means of a pressure medium, co-operates with a clamping piston 15 fixedly arranged in the counter-grip 7.
  • the pressure medium can firstly be passed into cylinder space 17, which is separated from cylinder space 19 by packings 18 arranged on the clamping piston 15.
  • the clamping cylinder 14 is thereby pressed downwards.
  • a shearing device 23 which consists of an upper blade 25 secured to a shearing cylinder 24 and a lower blade 26 fixedly arranged on the lower clamping jaw 22.
  • the shearing cylinder 24 co operates, in the same manner as the clamping cylinder 14, with a shearing piston 27 fixedly arranged in the upper part of the counter-gri 7, and is guided in guides 21a on the clamping cylinder 14 just as the latter is guided in guides 21 in the counter-grip 7.
  • the clamping cylinder 14 and the shearing cylinder 24 are externally of rectangular construction, and their adjacent walls are in sliding contact.
  • clamping piston and the shearing piston 27 are connected, by way of plates 28, with the upper part of the counter-grip 7.
  • a thrust plate 29 By means of a thrust plate 29, the clamping cylinder 14 and the shearing cylinder 24 are adjustable in their guides 21.
  • the method of working of the combination of clamping means and shearing means in the counter-grip 7 is such that immediately after the clamping and during or after the stretching of the stretch material 12, the part of the stretch material 12 that projects outwards beyond the clamping jaws l3 and 22 since the vertical portion 7a is located entirely to one side of the stretching axis, such projecting material can be severed close beside the clamping jaws by means of the upper and lower blades and 26. in this way, stretch material of different lengths can be economically racked without timewasting adjustment of the stretching grip, and can be carried away in unit lengths transversely to the stretching machine in the same direction as the advancing.
  • a hydraulic section-stretching machine comprising: a thrust beam, a stretching grip fixedly mounted on the thrust beam, a cylinder and piston mounted on the thrust beam and cooperating with the stretching grip, a counter-grip longitu' dinally movable along the thrust beam coacting with the stretching grip to grip a section to be stretched, the countergrip and stretching grip defining a stretching axis, and the counter-grip comprising means for arresting the movement of the counter-grip along the thrust beam, a C-shaped support constituted by a vertical portion and upper and lower horizontal portions, a clamping jaw mounted in the upper horizontal portion, a clamping jaw mounted in the lower horizontal portion, said horizontal portions and clamping jaws providing a first aperture which is open towards the stretching grip to accommodate the section to be stretched and a second aperture in the same plane but facing at right angles thereto towards the stretched section to be transported, one of the clamping jaws being movable perpendicularly to the stretching axis of a section secured by one end to the stretching grip
  • the severing means is a shearing device comprising upper and lower shear blades, the upper edge of the lower shear blade being stationarily arranged on the lower horizontal portion of the C-shaped support at the same level as the upper edge of the clamping jaw mounted on the lower horizontal portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
US4307A 1969-01-25 1970-01-20 Hydraulic section-stretching machine Expired - Lifetime US3675458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1903744A DE1903744B2 (de) 1969-01-25 1969-01-25 Hydraulische Profilstreckmaschine

Publications (1)

Publication Number Publication Date
US3675458A true US3675458A (en) 1972-07-11

Family

ID=5723379

Family Applications (1)

Application Number Title Priority Date Filing Date
US4307A Expired - Lifetime US3675458A (en) 1969-01-25 1970-01-20 Hydraulic section-stretching machine

Country Status (7)

Country Link
US (1) US3675458A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE744469A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1903744B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2029100A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1223537A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL158719B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE346477B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5582053A (en) * 1994-09-22 1996-12-10 Tapco International Corporation Combined portable sheet bending brake and cutter
CN108080428A (zh) * 2017-12-28 2018-05-29 浙江峰利祥铜业科技有限公司 一种铜型材的自动拉伸机构
CN111715732A (zh) * 2020-06-11 2020-09-29 蔡浇 一种配合铝型材出料的高效拉伸矫直装置
CN113426875A (zh) * 2021-07-01 2021-09-24 沅江市三阳机械制造有限公司 一种液压连续拉伸模
CN113523002A (zh) * 2021-07-28 2021-10-22 一重集团大连工程技术有限公司 基于高强板带层叠预紧的高刚度夹头梁

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2521883B1 (fr) * 1982-02-19 1985-08-30 Sacilor Procede de dressage d'un rail de chemin de fer et rail de chemin de fer dresse
FR2578457B1 (fr) * 1985-03-11 1987-05-22 Unimetall Sa Machine de traction pour le dressage et la relaxation des contraintes des rails en acier
AT389655B (de) * 1987-12-01 1990-01-10 Haginger Peter Anlage zum herstellen von aluminiumprofilen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867260A (en) * 1953-01-12 1959-01-06 Ungerer Fritz Method for stretching and cutting sheet metal, and machine for carrying out the method
US3037446A (en) * 1959-12-03 1962-06-05 Harris Foundry & Machine Compa Shearing machine
US3051217A (en) * 1958-07-11 1962-08-28 Aluminum Co Of America Stretching mechanisms
US3101045A (en) * 1959-12-31 1963-08-20 Waldemar Lindemann Charging box for a machine for operating on metal or similar scrap
US3123846A (en) * 1964-03-10 Wire heading machine with punch and gripper anvil
US3399559A (en) * 1965-06-03 1968-09-03 George A. Mitchell Method and apparatus for processing tubing

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123846A (en) * 1964-03-10 Wire heading machine with punch and gripper anvil
US2867260A (en) * 1953-01-12 1959-01-06 Ungerer Fritz Method for stretching and cutting sheet metal, and machine for carrying out the method
US3051217A (en) * 1958-07-11 1962-08-28 Aluminum Co Of America Stretching mechanisms
US3037446A (en) * 1959-12-03 1962-06-05 Harris Foundry & Machine Compa Shearing machine
US3101045A (en) * 1959-12-31 1963-08-20 Waldemar Lindemann Charging box for a machine for operating on metal or similar scrap
US3399559A (en) * 1965-06-03 1968-09-03 George A. Mitchell Method and apparatus for processing tubing

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5582053A (en) * 1994-09-22 1996-12-10 Tapco International Corporation Combined portable sheet bending brake and cutter
US5706693A (en) * 1994-09-22 1998-01-13 Tapco International Corporation Combined sheet bending brake and cutter
CN108080428A (zh) * 2017-12-28 2018-05-29 浙江峰利祥铜业科技有限公司 一种铜型材的自动拉伸机构
CN108080428B (zh) * 2017-12-28 2023-09-22 浙江峰利祥铜业科技有限公司 一种铜型材的自动拉伸机构
CN111715732A (zh) * 2020-06-11 2020-09-29 蔡浇 一种配合铝型材出料的高效拉伸矫直装置
CN113426875A (zh) * 2021-07-01 2021-09-24 沅江市三阳机械制造有限公司 一种液压连续拉伸模
CN113523002A (zh) * 2021-07-28 2021-10-22 一重集团大连工程技术有限公司 基于高强板带层叠预紧的高刚度夹头梁

Also Published As

Publication number Publication date
DE1903744B2 (de) 1975-07-17
FR2029100A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-10-16
GB1223537A (en) 1971-02-24
BE744469A (fr) 1970-06-15
NL158719B (nl) 1978-12-15
SE346477B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-07-10
DE1903744A1 (de) 1970-08-20
NL6919622A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1970-07-28

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