EP0073754A1 - Dispositif dans une presse a excentrique - Google Patents

Dispositif dans une presse a excentrique

Info

Publication number
EP0073754A1
EP0073754A1 EP19810900803 EP81900803A EP0073754A1 EP 0073754 A1 EP0073754 A1 EP 0073754A1 EP 19810900803 EP19810900803 EP 19810900803 EP 81900803 A EP81900803 A EP 81900803A EP 0073754 A1 EP0073754 A1 EP 0073754A1
Authority
EP
European Patent Office
Prior art keywords
arm
arrangement
eccentric press
pedestal
press
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Withdrawn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
EP19810900803
Other languages
German (de)
English (en)
Inventor
Jan Folke Wallenius
Carl Olov Helgesson
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.)
VENTIVE AB
Original Assignee
VENTIVE AB
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 VENTIVE AB filed Critical VENTIVE AB
Publication of EP0073754A1 publication Critical patent/EP0073754A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool

Definitions

  • the invention relates to an arrangement in an eccentric press with a reciprocating press element driven from a rotating drive shaft.
  • the object of the present invention is to provide automatic, mechanically controlled removal of the work ⁇ pieces from an eccentric press in co-ordination with the working cycle thereof in a reliable and safe manner and whilst permitting a high production rate of the eccentric press.
  • the arrangement in accord ⁇ ance with the invention has obtained the characteris- tics of claim 1.
  • FIG. 1 is a front view of an eccentric press with the arrangement in accordance with the invention
  • FIG. 2 is a plan view, partly in horizontal cross section, of a supporting beam for a picking arm which forms part of the arrangement in accordance with the invention
  • FIG. 3 is a side view of the eccentric press with the arrangement in accordance with the invention
  • FIG. 4 is a plan view of the arrangement in ac- cordance with the invention and the supporting beam thereof the eccentric press pedestal being partially shown in horizontal cross section
  • FIG. 5 is an enlarged side view, partly a vertical cross sectional view, of the picking arm
  • FIG. 6 is a plan view of the picking arm in FIG. 5,
  • FIG. 7 A - E are diagrammatic plan views of the picking arm in accordance with the invention which show various phases of the working.cycle : thereof,
  • FIG. 8 is a side view of the holder end of the picking arm in accordance with the invention in a modified embodiment,
  • FIG. 9 is a partial plan view of the arrangement in FIG. 8
  • FIG. 10 is a diagrammatic side view of the arrangement in accordance with the invention showing means for control of the removal
  • FIG. 11 is a diagrammatic plan view of the arrangement in FIG. 10.
  • a commercial design of eccentric press comprising a conventional column pedestal 10 in which an upper press element 11 is arranged which can move upwards and downwards for interaction with a lower press element 12 which is fixedly mounted to the pedestal.
  • pressing tools die and pad
  • the tools may be either substance tools in which the worked workpiece accompanies the tool of the upper press element during the return stroke, or table tools, in which the worked workpiece remains stationary in the tool of the lower press element during the return stroke.
  • the upper press element which moves up and down
  • OMPI IPO is arranged as a runner which is guided in the pedestal for vertical displacement in a manner not shown in de ⁇ tail here, and is connected by means of a connecting rod 13 to a crank or eccentric 14 on a substantially horizontal drive shaft 15 which is rotated from a drive motor at a drive wheel (fly wheel) mounted to the shaft.
  • the drive shaft 15 is always rotated in the same direction either continuously or intermittently (single-acting) in accordance with well known prin- ciples.
  • the arrangement in accordance with the invention is mounted on the eccentric press described, and an important element in this arrangement is a picking arm, the task of which is to remove the workpieces worked in the eccentric press, as these become ready - and to deposite them outside the eccentric press.
  • the eccentric press is sup ⁇ plemented by a supporting beam 17.
  • Two mounting angles 18 are fastened to the pedestal 10, one located above the other, for the mounting of the supporting beam, a cylindrical shaft 19 being gripped between the mounting angles, on which a sleeve 20 is slidably arranged.
  • the sleeve has a threaded bolt 21 projecting radially therefrom and provided with a nut, and one end of the supporting beam 17 is clamped to the sleeve by means of this bolt and nut, as shown most clearly in FIG. 2.
  • a plate 22 is fastened to the pedestal 10, having two bearing flanges 23, one above the other, a screw spindle 24 being mounted in these bearing flanges so as to be rotable but non-di spl ceabl e axially.
  • the bearing flanges are provided with suitable bearing bushes.
  • the screw spindle has a hexagonal spigot 25 so that it can be rotated at this spigot by means of a suitable tool, e.g. a socket wrench or adjustable spanner.
  • a cylindrical sleeve 26 is passed with sliding fit onto the screw spindle and has at its lower end a trap- ezoidally threaded nut 27 fastened thereto, which engages a trapezoidally threaded portion of the screw spindle.
  • the supporting beam 17 is fixedly connected to the sleeve 26 and as will easily be understood the supporting beam can be displaced vertically by rotating the screw spindle 24, the sleeve being screwed axially upwards or downwards dependent on the direction of rotation of the screw spindle, and the sleeve 20 simul ⁇ taneously sliding along the shaft 19.
  • the upper portion of the sleeve is designed as a clamp in that,. in a manner not shown in detail, it is separated from the remainder of the sleeve by means of a horizontal slot which extends over only a part of the circumference of the sleeve, and furthermore is slotted axially on one side so that the said upper portion of the sleeve can be clamped around the screw spindle by tightening a screw connec ⁇ tion 28.
  • the supporting beam Apart from the fact that the supporting beam.
  • the beam 17 can be adjusted vertically by means of the arrangement described, this also enables the beam to be swung out ⁇ wards from the pedestal 10. This is possible by separ ⁇ ating the beam from the sleeve 20 by unscrewing the nut from the bolt 21, after which the beam can be pivoted on the screw spindle 24 which rotates in the bearing flanges 23 thereof.
  • the frame 29 of the picking arm is fixedly attached to the supporting beam 17.
  • this frame forms a cylindrical bearing housing with a plane mounting flange 30, at which the bearing housing is mounted by means of a bolt connec ⁇ tion to the supporting beam.
  • a shaft 33 is rotably mounted by means of deep grooved ball bearings 31 which are kept mutually spaced by means of a spacer sleeve 32, and this shaft is pro ⁇ vided with locking nuts 34 at the top which together with a flange 35 at the bottom prevent the shaft 33, which is inserted from underneath, from moving axially.
  • the shaft 33 projects from an end cover 36 attached to the bearing housing, and forms a connec ⁇ ting spigot 37 at its projecting end.
  • a universal joint shaft 38 consisting of an inter ⁇ nally splined first portion and an externally splined second portion which can move axially in the first portion, is connected at the second portion to the connecting spigot 37 by means of a universal joint 39, whilst the first portion of the universal joint shaft is connected by means of a corresponding universal joint 40 to the output shaft of an angle gear train
  • a first arm 45 includes a box-shaped lower section 46a and a cover 46b which is fastened thereto, and the lower portion thereof is mounted to the lower end of the shaft 33 by means of bolts 47 and fixed to this end by cylindrical pins 48 so that the arm 45 can be swung by rotating the shaft 33.
  • This arm forms a gear ⁇ box housing and contains a gear drive with a gear wheel 49 which is non-rotably mounted to the bearing housing 29 by means of bolts 50 and cylindrical pins 51.
  • this gear wheel is stationary and it engages a second gear wheel 52 which is rotably mounted on a fixed pin 53 in the lower section 46a by means of a deep groove ball bearing 54 installed in a conventional manner, and engages in turn a third gear wheel 55 rotably mounted at end pins which can be integral with the gear wheel, in the lower section 46a and the cover 46b by means of deep groove ball bearings 56 and 57, respectively.
  • a tool arm 58 is attached by bolts 59 to the lower end pin of the gear wheel 55 and supports a tool 60 which is detachably and adjustably mounted.
  • the arm. 45 can be pivoted relative to the bearing housing 29 (frame of the picking arm) around a vertical axis and that the arm 58 can be pivoted relative to the arm 45 similarly around a vertical axis, the relative pivoting of the arms being positively controlled from the pivoting of the arm 45 by means of the gear drive arranged in the arm (gear ⁇ box housing) 45 in a manner to be described later.
  • the gear drive is so dimensioned (gear wheels 49 and 55) that the ratio between the shaft 33 and the arm 58 is 1:2, i.e.
  • the arm 58 when the arm 45 is rotated through a certain angle relative to the bearing housing 29, the arm 58 will be rotated through an angle which is twice as great, relat ve to the arm 45.
  • the picking arm is shown by continous lines in FIG. 7A in the same adjusted position as that in FIG. 5, i.e. the arms 45 and 58 are arranged al ⁇ ng the dot and dash line 61. If now the arm 45 is rotated in clockwise direction by means of the shaft 33 from the position shown in FIG. 7A through an angle ⁇ to the position in FIG. 7B, the arm 58 will be rotated in counter clockwise direc ⁇ tion by means of the gear wheel 59 through an angle 0, which because of the transmission ratio 1:2 in the gear drive will be twice as large as the angle .
  • the tool 60 is here shown as a spade to receive the workpieces ejected from the pressing tool on the upper press element (a substance die is involved here) and to remove, during a linear movement to the position P2 outside the eccentric press, the workpieces one by one from the eccentric press as the workpieces are finished.
  • an electromagnet 62 is supported by means of a bracket 63 attached to the pedestal 10 in order that the electromagnet, when energised, shall attract to it the workpiece on .the spade in the position P2 and then when the spade has been moved away from the position P2 to be moved once again to the position PI, shall be deenergised and shall drop the workpiece.
  • the use of microswitches for the control of the current supply to the electromagnet in dependence of the movement of the picking arm represents elementary control technique and this need not be described in greater detail here.
  • a projecting cover 64 is attached to the pedestal 10 to enclose the area of movement of the picking arm so that this cannot cause injury to personnel when it rotates outwards from the eccentric press.
  • This cover can be completely open at the bottom or can have a bottom with an aperture below the electromagnet 62 to permit downward release of the workpieces from the electromagnet.
  • the tool 60 should of course be adapted to the workpieces which are to be handled. In some cases a spade can be appropriate, as illustrated here, but it should be provided with a rim 65 so that the workpiece does not slide off the tool but will be kept in place during acceleration and retardation of the tool.
  • FIGS. 8 and 9 illustrate how a tool can be arranged on the arm 58 when the eccentric press operates with table tools on the press elements. It consists of an electromagnet 60' which is energised in the position PI so as to attract the workpiece to it and is de- energised in the position P2 so as to release the work ⁇ piece, which can be achieved by elementary control technique. Other types of tools adapted to the compo ⁇ nents can of course also be employed.
  • the picking arm is driven positively from the drive shaft 15 of the eccentric press and as will be
  • the arrangement in accordance with the invention enables removal of the workpiecesto take place fully automat cally at precisely the right time during the working cycle of the eccentric press without any manual intervention. This gives a calculable production flow from the eccentric press.
  • the arrangement functions rapidly; during tests with a prototype no less than 90 cycles per minute were achieved. It also operates at low noise level and is hence environmentally suitable.
  • he eccentric press can be rendered accessible for service and tool changing.
  • an interlock should be provided by means of which the eccentric press cannot be started or alternatively the picking arm is disconnected from the shaft 15 as long as the supporting beam 17 is swung outwards.
  • FIGS. 10 and 11 An example of how this moni ⁇ toring system can be arranged is shown in FIGS. 10 and 11.
  • a stationary inductive sensor 66 is arranged above the arm 45 to be acutated by a cam 67 on the arm when this is located within a predetermined angular area.
  • a photo sensor comprising a transmitter 68 and a receiver 69 is arranged in the path of movement of the arm 58; this can be replaced by an inductive sensor.
  • a slot 70 is provided which during the movement of the picking arm intersects the light beam between the transmitter 68 and the receiver 69.
  • the sensor 66 and receiver 69 are connected in series and if both are activated simultaneously (the cam 67 below the sensor 66 - the light beam from the transmitter 68 arrives at the receiver 69), a signal is given to a device (for example an electrical contact) by means of which the eccentric press is stopped.
  • a device for example an electrical contact
  • a corresponding safety arrangement for a tool in accordance with FIGS. 8 and 9 can include means for measuring the electrical output to the electromagnet 60' and for sensing the difference in output when a workpiece is attracted to the magnet and when this is not the case.
  • the press will be stopped when power output sensing indicates that there is no workpiece on the magnet when this leaves the position PI in the eccentric press.
  • the sensing moment can be governed by cams and sensors in the same manner as in the embodiment illustrated in FIGS. 10 and. 11. During the sensing of the electromagnet power output, the sensor must be calibrated continuously so as to compensate , for temperatur variations in the magnet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

Dispositif dans une presse a excentrique avec un element de presse ayant un mouvement alternatif (17) entraine par un arbre d'entrainement rotatif (15). Un bras de chasse avec un support (60) pour des pieces a usiner est relie a l'arbre d'entrainement (15) qui l'entraine via une transmission (38-44), ce bras de chasse etant deplacable lineairement dans la direction horizontale par la rotation de l'arbre d'entrainement entre une position (P1) dans la presse a excentrique et une position (P2) a l'exterieur de la presse.
EP19810900803 1981-03-13 1981-03-13 Dispositif dans une presse a excentrique Withdrawn EP0073754A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SE1981/000079 WO1982003201A1 (fr) 1981-03-13 1981-03-13 Dispositif dans une presse a excentrique

Publications (1)

Publication Number Publication Date
EP0073754A1 true EP0073754A1 (fr) 1983-03-16

Family

ID=20342837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810900803 Withdrawn EP0073754A1 (fr) 1981-03-13 1981-03-13 Dispositif dans une presse a excentrique

Country Status (3)

Country Link
EP (1) EP0073754A1 (fr)
AU (1) AU6924081A (fr)
WO (1) WO1982003201A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374889B1 (en) * 1997-05-05 2002-04-23 Exxonmobil Chemical Patents Inc. Tire sidewall compositions

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108146005A (zh) * 2017-12-19 2018-06-12 佛山市毅力机械制造有限公司 一种农牧业废弃物处理装置
CN110000299A (zh) * 2019-05-10 2019-07-12 明勖（东莞）精密机械有限公司 一种冲压机的台盘升降装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB281901A (en) * 1927-02-14 1927-12-15 Thos C Fawcett Ltd Improvements in or relating to brick-pressing machines
DE538634C (de) * 1931-01-20 1931-11-16 Ernst Haase Einrichtung an Material- Zufuehrungs-Vorrichtungen fuer Pressen, Stanzen, Scheren undsonstige Arbeitsmaschinen zur Erzeugung einer periodischen, durch die Antriebsbewegung zwanglaeufig herbeigefuehrten Steuerbewegung
DE1602570C3 (de) * 1967-06-30 1974-06-12 L. Schuler Gmbh, 7320 Goeppingen Pressenstraße
US3731820A (en) * 1969-07-08 1973-05-08 Nagoya Kiko Co Ltd Rectilinear motion device for a mechanical handling machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8203201A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6374889B1 (en) * 1997-05-05 2002-04-23 Exxonmobil Chemical Patents Inc. Tire sidewall compositions

Also Published As

Publication number Publication date
AU6924081A (en) 1982-10-06
WO1982003201A1 (fr) 1982-09-30

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Inventor name: WALLENIUS, JAN FOLKE

Inventor name: HELGESSON, CARL OLOV