EP0432373A1 - Dispositif pour avancer du matériel en forme de bande pas à pas - Google Patents

Dispositif pour avancer du matériel en forme de bande pas à pas Download PDF

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Publication number
EP0432373A1
EP0432373A1 EP90116857A EP90116857A EP0432373A1 EP 0432373 A1 EP0432373 A1 EP 0432373A1 EP 90116857 A EP90116857 A EP 90116857A EP 90116857 A EP90116857 A EP 90116857A EP 0432373 A1 EP0432373 A1 EP 0432373A1
Authority
EP
European Patent Office
Prior art keywords
drive
intermediate shaft
feed
drive pin
movement
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
EP90116857A
Other languages
German (de)
English (en)
Other versions
EP0432373B1 (fr
Inventor
Helmut Messner
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.)
Bruderer AG
Original Assignee
Bruderer AG
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 Bruderer AG filed Critical Bruderer AG
Publication of EP0432373A1 publication Critical patent/EP0432373A1/fr
Application granted granted Critical
Publication of EP0432373B1 publication Critical patent/EP0432373B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material
    • 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
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18248—Crank and slide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2183—Counterbalanced

Definitions

  • the present invention relates to a device for the step-by-step advancement of a band-shaped workpiece, with two feed units which are intended to receive a respective workpiece between them, the first feed unit being periodically movable for clamping the workpiece against the second feed unit and for releasing the workpiece therefrom is which two feed units are driven by a common shaft via an intermediate drive.
  • a feed device according to claim 1 is known from CH-PS 543 932.
  • Such devices are used, for example, as so-called feeders in punch presses. They are used to gradually push a band-shaped workpiece through a punch press, with the intended work, e.g. Punching, embossing etc. is carried out.
  • the sequence of movements of such devices for the stepwise advancement of a band-shaped workpiece can be divided into a number of steps as follows. It is assumed that the upper feed unit and the lower feed unit each have a feed roller in accordance with known designs, for example as disclosed in CH-PS 543 932. In operation, the two rollers perform an oppositely oscillating movement.
  • the lower feed roller is stationary, ie it is rotatably mounted in the respective machine housing and only performs oscillating movements.
  • the upper feed roller performs the same oscillating movements as the lower roller, but is additionally arranged such that it can be moved against and away from the lower feed roller in order to clamp or release the respective workpiece.
  • the upper feed roller accordingly carries out two movements, on the one hand the oscillating movement and on the other hand the up and down movement.
  • the individual operating steps now proceed as follows, the effect of the pressure ruler known in such devices being omitted for the sake of simplifying the explanation. It is assumed that the band-shaped workpiece has stopped and that a punching operation has just been completed. The tool, ie the catch pins, release the tape. Now the top roller, which is not oscillating at this time, lowers onto the belt, which is thus clamped between the top roller and the bottom roller, which is also stationary. Then both rollers start to rotate and push the belt forward by a fixed distance and come to a standstill again. The top roller lifts off, the tool closes and the punching work is done again. At the same time, when the top roller is lifted, the same and the bottom roller rotate back to their original position, so that the next feed step can take place after the belt has been released again by the tool.
  • both rollers are driven.
  • only the lower roller is driven and the upper roller is freely rotatable, so that it is only rotated during advancement due to the counterforce generated when the workpiece is clamped.
  • Another variant is the so-called pliers front thrust.
  • an upper clamping part which forms the jaw of the pliers, is pressed against a lower, sled-shaped part by means of, for example, a roller, the band-shaped workpiece being clamped between these two parts, the oscillating movement then for advancing the workpiece and for returning the clamping parts in the original position is straight.
  • the rollers or tongs of the known feeders are usually driven by means of crank drives. Due to this form of drive, the standstill is in the respective end position of the oscillation movement, i.e. extremely short at the time of reversing the direction of the rotational movement or the straight-line movement, only a few angular degrees long in relation to the crank mechanism During this movement or working phase, the acceleration and, accordingly, the deceleration of the moving components reach the maximum values. The so-called dynamic deformation also reaches the maximum value due to the elasticity of the respective components. Due to the steadily increasing speed of punching presses for economic reasons and their feed devices, the longer the accelerations and the longer the higher the deformations of the work parts and the strip-shaped workpiece. The apparent downtime is so short that the elastic deformation of machine parts and the workpiece, no matter how small, can completely subside, nor can any vibrations completely subside. The consequence of this is an unwanted change in the respective feed length and also imprecise products.
  • the invention will remedy this.
  • the invention as characterized in the claims, achieves the object of providing a device for gradually advancing a band-shaped workpiece, in which the drive pin of the crank drive for driving the second feed unit performs an oscillating movement in operation, the crank drive in an intermediate shaft is mounted, which in turn is mounted in a carriage oscillating in the opposite direction to the oscillating movement of the drive pin.
  • the device is driven by a shaft 10 which is connected to the drive e.g. the punch press is connected in such a way that it rotates synchronously with the lifting movement of the ram of the punch press.
  • This shaft 10 (see FIG. 3) has a control cam 11 at one end or is connected to a control cam 11.
  • a cam roller 12 is supported on this control cam 11.
  • This cam roller 12 is mounted in a link 13, which is also shown in FIG. 1.
  • a transmission rod 14 is articulated on the handlebar 13 and is articulated to a so-called rocker 2.
  • the rocker 2 is supported via springs 3 and 4 against the housing 20 of the device.
  • the rocker 2 is mounted on the housing 20 via a pair of arms 5.
  • the rocker 2 and the pair of arms 5 can also be seen in FIG. 2.
  • An upper roller 1 is also rotatably mounted in the rocker 2.
  • the top roller 1 rests on an elastically movable pliers 6.
  • These pliers 6, or this jaw of the overall pliers, can be moved against a carriage 8 which is supported on a lower roller 7 which is rotatably but non-displaceably mounted in the housing.
  • the components described so far are e.g. known from CH application No. 3984 / 88-1.
  • the further individual components, particularly those shown in FIG. 1, are not essential for understanding the present invention.
  • the oscillating movement for advancing the band-shaped workpiece 24 is effected by a crank mechanism 16 (FIG. 3), which is mounted eccentrically in an intermediate shaft 15 in such a way that its drive pin 17 performs an oscillating movement when the shaft 10 rotates.
  • the eccentric mounting of a crank mechanism for generating an oscillating movement of its drive pin is known as such and is therefore not described in more detail.
  • the drive pin 17 of the crank mechanism 16 shown in FIG. 3 is also drawn in FIG. 2, which represents one of the many possible designs for generating the oscillating movement.
  • the drive pin 17 is fixedly connected to a rocker arm 26 which is pivotally mounted in a bearing 27.
  • a sliding block 28 is mounted, in which the pin 29 of a crank 30 is inserted.
  • This crank 30 is on the one hand firmly connected to the lower roller 7 and on the other hand is equipped at the top with a toothed segment 31 which meshes with a longitudinally displaceable toothed rack 9 which in turn is firmly connected to a carriage 8 forming the lower part of the feed tongs.
  • the crank mechanism 16 is mounted eccentrically in an intermediate shaft 15 and has a spur-toothed section 32 which meshes with an internal toothing 33 of the intermediate shaft 15 in such a way that when the intermediate shaft 15 rotates, the drive pin 17 in a known manner only has a reciprocating oscillating movement executes.
  • the intermediate shaft 15 is in turn supported in a carriage 18 via roller bearings 34, 35. This carriage 18 is supported in guide pieces 36, 37 so that it can be moved back and forth in a straight line. The mobility is thus, with reference to FIG. 3, perpendicular to the drawing sheet toward the viewer and away from the viewer.
  • the intermediate shaft is connected at its left end to a cam disk 21, which in turn is connected to the shaft 10 via a cross disk 38.
  • the cam disk 21 is guided between two cam rollers 19, 19 '(see FIG. 4), which cam rollers 19, 19' are mounted in a stationary manner in the housing 20.
  • the cam disk 21 has a circumferential control surface, ie a guide surface, which is generally circular and a projection section 22 and a diametrical one has opposite flattened portion 23. It is accordingly evident from FIG. 4 that when the cam disk 21 rotates, it performs an oscillating horizontal movement due to the cam rollers 19, 19 'and the projection section 22 and the flattened section 23, which movement is transmitted to the slide 18 via the intermediate shaft 15.
  • the cam disk 21, in particular its projection section 22 and flattened section 23, is designed and arranged in such a way that the intermediate shaft 15 performs a movement opposite to the drive journal 17 of the crank mechanism and additionally performs the same over a larger crank angle.
  • the sum of these two movements in the sections of the respective end positions O, i.e. the drive pin 17 is now stationary for a longer period (e.g. 30 ° crank angle).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Feeding Of Workpieces (AREA)
EP90116857A 1989-12-11 1990-09-03 Dispositif pour avancer du matériel en forme de bande pas à pas Expired - Lifetime EP0432373B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4440/89 1989-12-11
CH4440/89A CH680056A5 (fr) 1989-12-11 1989-12-11

Publications (2)

Publication Number Publication Date
EP0432373A1 true EP0432373A1 (fr) 1991-06-19
EP0432373B1 EP0432373B1 (fr) 1993-01-13

Family

ID=4276169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116857A Expired - Lifetime EP0432373B1 (fr) 1989-12-11 1990-09-03 Dispositif pour avancer du matériel en forme de bande pas à pas

Country Status (5)

Country Link
US (1) US5110026A (fr)
EP (1) EP0432373B1 (fr)
JP (1) JPH03189031A (fr)
CH (1) CH680056A5 (fr)
DE (1) DE59000759D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04313556A (ja) * 1990-11-30 1992-11-05 Sankyo Seisakusho:Kk ロールフィード
US5287658A (en) * 1991-06-04 1994-02-22 Seva Polishing machine having combined alternating translational and rotational tool motion
JPH0719631Y2 (ja) * 1992-02-28 1995-05-10 株式会社山田ドビー ロールフィーダーにおける上ロールの押圧装置
DE19727890A1 (de) 1997-07-01 1999-01-07 Bayer Ag Verfahren zur Herstellung von 2,4,5-Trifluor-benzonitril
DE50211400D1 (de) * 2002-08-22 2008-01-31 Bruderer Ag Vorschubvorrichtung zum intermittierenden Zuführen eines bandförmigen Rohlings zu einer Presse und Verfahren zum Betrieb derselben

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1362224A (fr) * 1963-07-01 1964-05-29 Schuler L Ag Entraînement pour cylindres d'avance
GB1405774A (en) * 1971-10-01 1975-09-10 Bruderer Ag Apparatus for the stepwise feed of workpieces
DE7834958U1 (de) * 1978-11-24 1987-10-15 Bihler, Otto, 8959 Halblech, Post Trauchgau Vorschubvorrichtung für den Materialeinzug für Maschinen oder Vorrichtungen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156387A (en) * 1974-09-03 1979-05-29 Bruderer Ag Apparatus for mass compensation at a machine driven by a crank drive
EP0215961B1 (fr) * 1985-09-03 1990-06-13 Aida Engineering Ltd. Dispositif d'équilibrage dynamique pour presse
US4979476A (en) * 1990-05-21 1990-12-25 Islas John J Counter-balance system for counter-rotating twin-shaft reciprocating engine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1362224A (fr) * 1963-07-01 1964-05-29 Schuler L Ag Entraînement pour cylindres d'avance
GB1405774A (en) * 1971-10-01 1975-09-10 Bruderer Ag Apparatus for the stepwise feed of workpieces
DE7834958U1 (de) * 1978-11-24 1987-10-15 Bihler, Otto, 8959 Halblech, Post Trauchgau Vorschubvorrichtung für den Materialeinzug für Maschinen oder Vorrichtungen

Also Published As

Publication number Publication date
DE59000759D1 (de) 1993-02-25
CH680056A5 (fr) 1992-06-15
JPH03189031A (ja) 1991-08-19
EP0432373B1 (fr) 1993-01-13
US5110026A (en) 1992-05-05

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