US3568498A - Guide system for rams in press brakes and the like - Google Patents

Guide system for rams in press brakes and the like Download PDF

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Publication number
US3568498A
US3568498A US793801*A US3568498DA US3568498A US 3568498 A US3568498 A US 3568498A US 3568498D A US3568498D A US 3568498DA US 3568498 A US3568498 A US 3568498A
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US
United States
Prior art keywords
ram
machine
slideways
guide means
rams
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Expired - Lifetime
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US793801*A
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English (en)
Inventor
Eugene W Pearson
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.)
Pacific Press and Shear Corp
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Pacific Press and Shear Corp
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Publication of US3568498A publication Critical patent/US3568498A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/06—Sheet shears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/068—Drive connections, e.g. pivotal

Definitions

  • My invention relates to ram type machines such as press brakes and the like, and more particularly though not limited to one of the straight side type wherein a platent type ram is guided by corner columns.
  • Presses of this type are employed with mating dies having critical dimensions in length as well as in width, and consequently, to assure accurate mating of the dies and complete meshing of the same, the ram must of necessity be limited in its permissible longitudinal displacements, as well as in permissive tilting thereof from a prevailing attitude.
  • the permissible longitudinal displacement of the ram is determined by the spacing required to assure adequate lubrication of the slideways, and the machine housing is constructed rugged enough to restrain any tendency of the ram to shift or tilt, particularly in response to off center loads. Under such conditions, a severe unbalance of loading on the ram could cause a tilting movement of such magnitude as to cause severe galling of the slideways, and such problem is aggravated when the machine is hydraulically powered and the hydraulic motors are supported inboard of the ram slideways.
  • FIG. 1 is a front view in elevation of a machine embodying the present invention
  • FIG. 2 is a plan view looking down on the machine of FIG. 1;
  • FIG. 3 is vertical view partly in section through the machine of FIG. 1;
  • FIG. 4 is an enlarged view of a ram guide means assembly employed in the machine of FIG. 1
  • FIG. 5 is a view corresponding to that of FIG. 4 but depicting a modified form of guide means assembly.
  • the invention is disclosed as embodied in a press brake of the type having a platen type ram 1 slidably supported between corner columns 3, 5, 7 and 9, and driven by hydraulic motors 11, 13 symmetrically mounted above the ram and each drive connected thereto by a pivotal drive coupling 15, such as disclosed, for example, in the patent to Pearson et al. No. 3,145,602 of Aug. 25, 1964, or in the patent to Eugene W. Pearson, No. 3,163,105 of Dec. 29, 1964.
  • Each column supports two slideways 17 and 19 for guiding such ram and limiting displacements thereof both longitudinally (left to right) as well as transversely (front to back), respectively.
  • a table 21 below the ram and included as a component part of the machine, is a table 21, this table being adapted to support one component of a mating die assembly (not illustrated) while the other component is mounted on the ram in alignment therewith.
  • sheet material disposed therebetween will be correspondingly deformed.
  • the amount of tilt of the ram may be quite small, and, as a maximum, might be of the order of one-eighth inch.
  • guide clearances are normally of the order of .003 inch.
  • a .001 inch per foot tilt can be tolerated without binding. Anything beyond this, of course, could cause the slide pad to bear against a slideway, on more or less a line or point contact, with resulting possibility of galling the slideway.
  • I provide a guide means assembly 23 between the ram and each proximate slideway, which assembly performs the multiple functions of guiding the ram in its vertical movements without galling, while permitting limited angular rotation of the ram; and precluding longitudinal displacements beyond the mating ability of any mating dies in the machine.
  • each guide means assembly provides for a slide pad 25 in sliding engagement with the proximate slideway, against which it is retained by resilient means interposed between the slide pad and the ram, such resilient means, in the embodiment under consideration, involving a bracket 27 on the face of the ram, opposite the slide pad, both the bracket and slide pad being recessed at corresponding vertically spaced locations to anchor a pair of heavy springs 29, 31 installed under compression.
  • a spherical recess 35 is provided in the exposed side of the slide pad, to receive the spherical side 37 of a spherical segment 39 formed with a lip 41 at its lower end, extending in the direction of the bracket.
  • the spherical segment has a planar base surface 43 at an angle to the lip, to provide an angular space between the base surface and the bracket, for reception of 3 an adjusting wedge 45.
  • the wedge is provided With an anchored bolt 47 at its narrow end, adapted to pass through an aligned opening in the lip, and with nuts 49, 51 mounted on such bolt to either side of the lip, the wedge may be adjusted and locked in any desired position.
  • such permissive angular rotation of the ram is deliberately built into the guide means assemblies, for it then not only relieves the slide pad and frame of the function of resisting such angular displacements, but permits of the use of known hydraulic means for taking over this function.
  • a hydraulic system which is admirably adapted for this purpose is one disclosed in either the patent to Richardson No. 2,906,096 of Sept. 29, 1957 for Precision Controlled System for Press Brakes or the Like, or that disclosed in the patent to Castle No. 3,026,755 of Mar. 27, 1962 for Hydraulically Actuated Clamp for Work Severing Device, or that disclosed in the patent to Pearson et al. No. 3,143,924 of Aug. 11, 1964, for Control Means for Series Connected Cylinder Drive Assemblies.
  • Each of such systems is a hydraulic levelling system for precluding angular deviations of a ram from a level condition.
  • This embodiment is of somewhat simpler construction in that it employs a spherical segment 61 of symmetrical form which is slidably mounted in the bracket 63 which for this purpose, is substantially thicker than the bracket in the embodiment of FIG. 4.
  • Such mounting involves providing the spherical segment with a center bolt 65 and a pair of guide pins 67, 69, each adapted to slidably fit a passageway through the bracket, the bolt extending completely through the bracket to receive a tightening nut 71.
  • adjustments are made by applying shims 73 between the spherical segment and the bracket.
  • pivot means of the guide means assembly and the pivot means of the proximate pivot drive coupling should have the same radius point.
  • a machine of the press brake type having a ram movable between slideways, and hydraulic drive means pivotally connected to said ram, guide means between said ram and each of said slideways, each of said guide means including a slide pad adapted to slidably engage a slideway, means between said ram and said pad for resiliently retaining said pad in sliding engagement with said slideway, and pivotal means between said ram and said pad to permit angular movement of said ram without disturbing the sliding engagement between said pad and its associated slideway.
  • a machine in accordance with claim 1 characterized by means for maintaining said ram at a prevailing attitude.
  • a machine in accordance with claim 1 characterized by said pivotal means including pivotally cooperating components and means for adjusting clearance between said components.
  • a machine in accordance with claim 3 characterized by said pivotal cooperating components including said pad having a spherical recess in its exposed side, and a spherical segment in meshing relationship with said spherical recess.
  • a machine in accordance with claim 1 characterized by said ram being of the platen type movable between column supported slideways, a bracket on the front side of said platen type ram adjacent each end thereof, with each said guide means being located between one of said brackets and the proximate slideway, and said resilient retaining means including a pair of springs, each installed between an end of said bracket and an end of said slide pad, with said pivotal means located between said springs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
US793801*A 1969-01-24 1969-01-24 Guide system for rams in press brakes and the like Expired - Lifetime US3568498A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79380169A 1969-01-24 1969-01-24

Publications (1)

Publication Number Publication Date
US3568498A true US3568498A (en) 1971-03-09

Family

ID=25160832

Family Applications (1)

Application Number Title Priority Date Filing Date
US793801*A Expired - Lifetime US3568498A (en) 1969-01-24 1969-01-24 Guide system for rams in press brakes and the like

Country Status (4)

Country Link
US (1) US3568498A (enrdf_load_stackoverflow)
JP (1) JPS4916389B1 (enrdf_load_stackoverflow)
BE (1) BE736565A (enrdf_load_stackoverflow)
GB (1) GB1242615A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321819A (en) * 1980-07-23 1982-03-30 Dyneer Corporation Press construction
US4413555A (en) * 1980-06-19 1983-11-08 Swinney Engineering Limited Press for the compression of loads
EP0360875A1 (de) * 1988-09-02 1990-04-04 Gräbener Pressensysteme GmbH & Co. KG Umformmaschine, insbesondere mechanische Presse
EP1050401A3 (en) * 1999-04-06 2001-11-14 Aida Engineering Co., Ltd. Slide guide arrangement, knockout device and press machine using the same
EP1208964A3 (en) * 2000-11-22 2002-12-04 Aida Engineering Co., Ltd. Slide guide device for presses
US7111549B2 (en) * 2001-06-09 2006-09-26 The Minster Machine Company T-gib dynamic balancer weight guide
CN100415498C (zh) * 2002-02-05 2008-09-03 爱达工程株式会社 压力机滑块导轨装置
ITAR20110021A1 (it) * 2011-11-07 2013-05-08 Giorgio Violi Pressa automatica di compattazione, particolarmente per la compattazione di materiale di scarto

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3913598B2 (ja) * 2002-04-16 2007-05-09 アイダエンジニアリング株式会社 プレス機械のスライドガイド装置
CN105215136A (zh) * 2015-09-12 2016-01-06 安徽互感器有限公司 一种电流互感器接线铜排冲剪模

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4413555A (en) * 1980-06-19 1983-11-08 Swinney Engineering Limited Press for the compression of loads
US4321819A (en) * 1980-07-23 1982-03-30 Dyneer Corporation Press construction
EP0360875A1 (de) * 1988-09-02 1990-04-04 Gräbener Pressensysteme GmbH & Co. KG Umformmaschine, insbesondere mechanische Presse
EP1050401A3 (en) * 1999-04-06 2001-11-14 Aida Engineering Co., Ltd. Slide guide arrangement, knockout device and press machine using the same
US6524092B1 (en) 1999-04-06 2003-02-25 Aida Engineering Co., Ltd. Slide guide device, knockout device, and press machine using the same
EP1208964A3 (en) * 2000-11-22 2002-12-04 Aida Engineering Co., Ltd. Slide guide device for presses
US6764218B2 (en) 2000-11-22 2004-07-20 Aida Engineering Co., Ltd. Slide guide device for presses
US7111549B2 (en) * 2001-06-09 2006-09-26 The Minster Machine Company T-gib dynamic balancer weight guide
CN100415498C (zh) * 2002-02-05 2008-09-03 爱达工程株式会社 压力机滑块导轨装置
ITAR20110021A1 (it) * 2011-11-07 2013-05-08 Giorgio Violi Pressa automatica di compattazione, particolarmente per la compattazione di materiale di scarto

Also Published As

Publication number Publication date
GB1242615A (en) 1971-08-11
JPS4916389B1 (enrdf_load_stackoverflow) 1974-04-22
BE736565A (enrdf_load_stackoverflow) 1969-12-31

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