EP1362189A1 - Führungsvorrichtung eines stellkolbens - Google Patents

Führungsvorrichtung eines stellkolbens

Info

Publication number
EP1362189A1
EP1362189A1 EP01905814A EP01905814A EP1362189A1 EP 1362189 A1 EP1362189 A1 EP 1362189A1 EP 01905814 A EP01905814 A EP 01905814A EP 01905814 A EP01905814 A EP 01905814A EP 1362189 A1 EP1362189 A1 EP 1362189A1
Authority
EP
European Patent Office
Prior art keywords
hinged
shafts
plunger
con
axes
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.)
Granted
Application number
EP01905814A
Other languages
English (en)
French (fr)
Other versions
EP1362189B1 (de
Inventor
Franco Stefani
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.)
System SpA
Original Assignee
System SpA
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 System SpA filed Critical System SpA
Publication of EP1362189A1 publication Critical patent/EP1362189A1/de
Application granted granted Critical
Publication of EP1362189B1 publication Critical patent/EP1362189B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1471—Guiding means other than in the end cap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection

Definitions

  • the invention relates to a device for guiding a plunger of a jack. Specifically, though not exclusively, the invention is usefully applied in the field of hydraulic jacks in presses, having large non-circular plungers (elliptic, oval, rectangular etc.) Background Art
  • pistons which are of as close a shape as possible to the shape of the objects to be pressed (i.e. rectangular pistons with bevelled edges, or at least oval).
  • the present invention offers a valid and viable alternative to the above-described hydraulic-electronic systems, and is characterised by a completely mechanical operation and structure.
  • the advantages of the invention are mainly connected with its substantial simplicity, making it extremely reliable.
  • figure 1 shows part of a schematic and partly-sectioned vertical elevation of a press equipped with the device of the invention
  • figure 2 is a perspective schematic view of the invention. Disclosure of Invention
  • 1 denotes in its entirety a press having a jack 2 with a non-circular section, in particular elliptical.
  • the press 1 is used to compact ceramic powders 8 to obtain generally rectangular products.
  • the rectangular pressing surface is very large and the elliptical plunger 3 of the jack 2 is also of a considerable size.
  • the problem of raising and lowering the plunger 3 uniformly, i.e. with the mobile pressing surface constantly parallel to the fixed pressing plane, is solved by using at least one hinged mechanism, basically a parallel-bar link comprising the following members: two con rods 4 having their first ends hinged to the plunger 3 by means of pivots 14; two squared elements 5, 6 hinged on two shafts 15, 16 having axes which are parallel to those of the pivots 14 and to which the second ends of the con rods 4 are hinged at predetermined distances from the shafts 15, 16; a connecting element, i.e. a connection element functioning as a con rod 7 and having ends hinged to the squared elements 5, 6.
  • This hinged mechanism has the special characteristic that at least one of its members is elastically deformable to a predetermined degree.
  • two hinged mechanisms are present, having as mentioned an overall parallelogram shape, being identical and arranged symmetrically with respect to a halfway median plane parallel to the direction of the plunger 3 stroke.
  • the symmetrically arranged and aligned squared elements 5, 6 of the two hinged mechanisms are both solidly constrained to ends of the two shafts 15, 16.
  • the shafts 15 and 16 are coupled in seatings which are made solid to the jack 2, and are freely rotatable about their own axes.
  • the elastically deformable members are mainly the con rods 4 which are so conformed and structured as to exhibit a flexional elastic deformability, enabling their length to vary.
  • the con rods 4 exhibit a non-straight natural configuration even in the absence of flexional solicitation.
  • any lack of uniformity in the ceramic material induces the plunger to follow the non-uniform arrangement of the material and to be arranged not-exactly parallel to the fixed pressing plane.
  • This tendency of the plunger is opposed by the two hinged mechanisms, but the elastic deformability of the con rods 4 enables the plunger to adapt and assume a not-perfectly-parallel position with regard to the fixed pressing plane.
  • This elastic deformability is calculated in such a way as to enter into play during the pressing phase when the forces reach certain predetermined levels.
  • Advantages of the present invention are its simplicity and reliability. Furthermore, the invention guarantees optimum pressing of the ceramic powders
  • the invention protects the mechanism against any eventual overloads.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Prostheses (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Knitting Machines (AREA)
  • Press Drives And Press Lines (AREA)
EP01905814A 2001-02-20 2001-02-20 Führungsvorrichtung eines stellkolbens Expired - Lifetime EP1362189B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2001/001947 WO2002066843A1 (en) 2001-02-20 2001-02-20 A device for guiding a plunger of a jack

Publications (2)

Publication Number Publication Date
EP1362189A1 true EP1362189A1 (de) 2003-11-19
EP1362189B1 EP1362189B1 (de) 2004-09-01

Family

ID=8164303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01905814A Expired - Lifetime EP1362189B1 (de) 2001-02-20 2001-02-20 Führungsvorrichtung eines stellkolbens

Country Status (6)

Country Link
EP (1) EP1362189B1 (de)
AT (1) ATE275241T1 (de)
DE (1) DE60105320T2 (de)
ES (1) ES2227129T3 (de)
PT (1) PT1362189E (de)
WO (1) WO2002066843A1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE382644C (de) * 1923-10-04 Eulenberg Moenting & Co M B H Presse, insbesondere fuer Kuempelzwecke, o. dgl. Werkzeugmaschine
DE872733C (de) * 1951-11-16 1953-04-02 Karl Keck Presse mit in mehreren Punkten angetriebenem Stoessel
FR1062361A (fr) * 1952-09-01 1954-04-21 Renault Perfectionnements aux presses mues par un fluide sous pression
DE1261759B (de) * 1958-02-22 1968-02-22 Becker & Van Huellen Hydraulische Presse mit Presstischfuehrung
DE2919012A1 (de) * 1979-05-11 1980-11-20 Schloemann Siemag Ag Ueberlastsicherung an hydraulischen umformpressen, insbesondere blechformziehpressen
DE4401507A1 (de) * 1994-01-20 1995-08-03 Haendle Gmbh & Co Kg Führung eines Druckbalkens im Maschinengestell einer Presse, insbesondere Dachziegelpresse

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02066843A1 *

Also Published As

Publication number Publication date
WO2002066843A1 (en) 2002-08-29
ES2227129T3 (es) 2005-04-01
EP1362189B1 (de) 2004-09-01
ATE275241T1 (de) 2004-09-15
DE60105320D1 (de) 2004-10-07
PT1362189E (pt) 2005-01-31
DE60105320T2 (de) 2005-09-29

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