EP1518667A2 - Vorrichtung zum Einstellen des Hubes an einer mechanischen Presse und Verfahren zum Einstellen des Hubes mit dieser Vorrichtung - Google Patents

Vorrichtung zum Einstellen des Hubes an einer mechanischen Presse und Verfahren zum Einstellen des Hubes mit dieser Vorrichtung Download PDF

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Publication number
EP1518667A2
EP1518667A2 EP04021300A EP04021300A EP1518667A2 EP 1518667 A2 EP1518667 A2 EP 1518667A2 EP 04021300 A EP04021300 A EP 04021300A EP 04021300 A EP04021300 A EP 04021300A EP 1518667 A2 EP1518667 A2 EP 1518667A2
Authority
EP
European Patent Office
Prior art keywords
shaft
kinematic mechanism
press
rotate
joint
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.)
Withdrawn
Application number
EP04021300A
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English (en)
French (fr)
Other versions
EP1518667A3 (de
Inventor
Donato Manera
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1518667A2 publication Critical patent/EP1518667A2/de
Publication of EP1518667A3 publication Critical patent/EP1518667A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B30B1/266—Drive systems for the cam, eccentric or crank axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
    • B30B1/263—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks work stroke adjustment means

Definitions

  • the present invention refers to a device which allows the stroke of a mechanical press to be adjusted - in particular during descent of the mobile part of the press and around its bottom dead centre - and to a method of adjusting the stroke of the press by means of the aforesaid device.
  • the mobile part has a cyclical movement, with respect to the fixed part, which brings it from a top dead centre to a bottom dead centre and vice versa.
  • the characteristics of the movement of the mobile part of the press around the bottom dead centre are of particular importance because they affect the ability of the press to perform the work required (drawing, deep drawing, punching, coining, etc.), the wear of the press members and of the dies, and so on.
  • a known means of giving the movement of the mobile part of the press, in particular around the bottom dead centre, the optimal characteristics for the specific use for which the press is intended on each occasion is the use of systems comprising a number of levers, inserted in the "chain" which transits the movement from a motor to the mobile part of the press, which modify the characteristics of said movement to adapt it to specific requirements.
  • Another known means of giving the movement of the mobile part of the press, in particular around the bottom dead centre, the optimal characteristics for the specific use for which the press is intended on each occasion is to insert into the "chain" which transmits the movement from the motor to a shaft (normally a crankshaft) that moves the mobile part of the press means (controllable by the operator) designed to modify the position of a gear belonging to the said "chain” with respect to the axis of the shaft, thus modifying the position (in degrees) of the bottom dead centre and, consequently, the speed of descent of the mobile part of the press.
  • the aforesaid means are (generally) complex and costly and do not allow the beginning the flattened part of the movement curve of the mobile part to be adjusted with respect to the bottom dead centre whilst the position (in degrees) of the bottom dead centre remains unchanged.
  • the device forming the subject matter of the present invention allows the drawbacks and/or limitations of the above described known devices to be overcome simply and economically.
  • a device realised according to the invention has at least the characteristics set forth in claim 1; further characteristics of said device are set forth in the dependent claims.
  • Figure 1 shows diagrammatically a first embodiment of a device, made according to the invention, for adjusting the stroke of a mechanical press.
  • Said device comprises, in combination with each other:
  • the means 5 make the shaft 3 to rotate with respect to the first kinematic mechanism 2 with the press at rest.
  • the shaft 3 is a crankshaft but, without departing from the scope of the invention, it is possible to make the shaft 3 by means of any other known functionally equivalent mechanism.
  • the joint 4 illustrated in the appended drawings is a clutch joint but, without departing form the scope of the invention, it is possible to replace it with any other type of per se known functionally equivalent joint.
  • first and second kinematic mechanism (2, 1) illustrated in the appended drawings will not be described because they are per se known and, without departing from the scope of the invention, they can be replaced with another per se known functionally equivalent kinematic mechanism.
  • the means 5 designed to make the shaft 3 rotate with respect to the first kinematic mechanism 2 consist of a geared motor coupled to the shaft 3 in a per se known manner (for example by a worm screw 7 - worm wheel 8 coupling) but, without departing from the scope of the invention, it is possible to replace the geared motor 5 and/or the worm screw 7- worm wheel 8 coupling with other functionally equivalent devices.
  • the worm screw 7 - worm wheel 8 coupling is situated at one end of the shaft 3 but, without departing from the scope of the invention, said coupling can be in an intermediate position on the shaft 3.
  • Figure 2 shows diagrammatically the device of Figure 1 in which the shaft 3 is uncoupled from the first kinematic mechanism 2 by means of the joint 4.
  • Figure 3 shows diagrammatically a second embodiment of a device, made according to the invention, for adjusting the stroke of a mechanical press, which differs from that shown in Figures 1 and 2 essentially in that the means 5 designed to cause the shaft 3, uncoupled from the first kinematic mechanism 2 by means of the joint 4, to rotate with respect to the first kinematic mechanism 2 consist of a mobile piston 9 (preferably but not necessarily a hydraulic piston) which is carried by a support 10 integral with the second kinematic mechanism 1 and which is brought against the shaft 3 to lock the mobile part 6 of the press in a pre-established point, for example at its top dead centre.
  • a mobile piston 9 preferably but not necessarily a hydraulic piston
  • the mobile piston 9 preferably enters a hole (not visible in Figure 3) formed in the shaft 3, preferably in such a position as to lock the mobile part 6 of the press at its top dead centre.
  • the first kinematic mechanism 2 is rotated with respect to the shaft 3 and, if the mobile piston 9 does not lock the mobile part 6 of the press at the top dead centre, the kinematic mechanism 2 is operated to return the mobile part 6 of the press to the top dead centre.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP04021300A 2003-09-18 2004-09-08 Vorrichtung zum Einstellen des Hubes an einer mechanischen Presse und Verfahren zum Einstellen des Hubes mit dieser Vorrichtung Withdrawn EP1518667A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20031783 2003-09-18
ITMI20031783 ITMI20031783A1 (it) 2003-09-18 2003-09-18 Dispositivo per regolare la corsa di una pressa meccanica e metodo per regolare detta corsa mediante detto dispositivo

Publications (2)

Publication Number Publication Date
EP1518667A2 true EP1518667A2 (de) 2005-03-30
EP1518667A3 EP1518667A3 (de) 2006-01-04

Family

ID=34179329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021300A Withdrawn EP1518667A3 (de) 2003-09-18 2004-09-08 Vorrichtung zum Einstellen des Hubes an einer mechanischen Presse und Verfahren zum Einstellen des Hubes mit dieser Vorrichtung

Country Status (2)

Country Link
EP (1) EP1518667A3 (de)
IT (1) ITMI20031783A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2363215A1 (de) * 2010-03-05 2011-09-07 HINTERKOPF GmbH Umformeinrichtung
US8826715B2 (en) 2010-03-05 2014-09-09 Hinterkopf Gmbh Forming device
CN114985558A (zh) * 2022-07-14 2022-09-02 诸城大舜汽车科技有限公司 一种汽车座椅钢板加工用冲压装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097900A5 (de) * 1970-06-15 1972-03-03 Schuler Gmbh L
DE2164774A1 (de) * 1971-12-27 1973-07-12 Edelhoff Werkzeugmasch Vorrichtung zum veraendern des hubes des stoessels einer exzenterpresse
FR2479740A1 (fr) * 1980-04-02 1981-10-09 Strasbourg Sa Forges Dispositif automatique de changement de course du coulisseau dans une presse mecanique a course variable
DE3112382C2 (de) * 1981-03-28 1983-11-24 RWM-Raster-Werkzeugmaschinen GmbH, 7136 Ötisheim Hubverstelleinrichtung für Exzenterpressen oder -stanzen
DE8336071U1 (de) * 1983-12-15 1985-12-12 Maschinenfabrik Müller-Weingarten AG, 7987 Weingarten Exzenterpresse mit Hubverstellung und einer Einrichtung zum Entkuppeln der Exzenterbüchse sowie mit einer Vorrichtung, mittels der eine reibungsschlüssige Verbindung zwischen Pleuel und Exzenterbüchse herstellbar ist
DE3677597D1 (de) * 1986-06-06 1991-03-28 Schuler Gmbh L Vorrichtung an einer presse mit exzenterwelle zum verstellen des stoesselhubes.
US6164147A (en) * 1999-02-05 2000-12-26 The Minster Machine Company Adjustable link motion press

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2363215A1 (de) * 2010-03-05 2011-09-07 HINTERKOPF GmbH Umformeinrichtung
US8826715B2 (en) 2010-03-05 2014-09-09 Hinterkopf Gmbh Forming device
US8997544B2 (en) 2010-03-05 2015-04-07 Hinterkopf Gmbh Forming device
CN114985558A (zh) * 2022-07-14 2022-09-02 诸城大舜汽车科技有限公司 一种汽车座椅钢板加工用冲压装置

Also Published As

Publication number Publication date
ITMI20031783A1 (it) 2005-03-19
EP1518667A3 (de) 2006-01-04

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