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EP0578928A1 - Dispositif d'avancement pour le transport par étapes de matériel et/ou de pièces à usiner sur ou vers des machines de production fonctionnant par intermittence - Google Patents

Dispositif d'avancement pour le transport par étapes de matériel et/ou de pièces à usiner sur ou vers des machines de production fonctionnant par intermittence Download PDF

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Publication number
EP0578928A1
EP0578928A1 EP93106330A EP93106330A EP0578928A1 EP 0578928 A1 EP0578928 A1 EP 0578928A1 EP 93106330 A EP93106330 A EP 93106330A EP 93106330 A EP93106330 A EP 93106330A EP 0578928 A1 EP0578928 A1 EP 0578928A1
Authority
EP
European Patent Office
Prior art keywords
rocker
articulated
cam
feed device
lever
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
EP93106330A
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German (de)
English (en)
Other versions
EP0578928B1 (fr
Inventor
Günter Zierpka
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0578928A1 publication Critical patent/EP0578928A1/fr
Application granted granted Critical
Publication of EP0578928B1 publication Critical patent/EP0578928B1/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
    • B21D43/05—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work specially adapted for multi-stage presses

Definitions

  • the invention relates to a feed device for the gradual transport of material and / or workpieces on or in intermittently working production machines, such as presses, in which two gripper rails, which are spaced apart along the transport path and can be moved back and forth together in the feed direction, are derived from one are intermittently driven about a cam disk extending in the feed direction via a cam disk follower interacting with it and via transmission means engaging guide means of the gripper rails in at least one direction essentially perpendicular to the feed direction.
  • a feed device of this type and purpose is known in which the gripper rails can be moved back and forth together in the feed direction and are guided against one another transversely thereto as well as derived from one drive cam for each direction of movement.
  • the drive cams are rotatably arranged on a common drive shaft that extends parallel to the gripper rails beneath them.
  • the gripper rail movements in the feed direction are derived from an axial cam disc and are transmitted via a thrust member that is movably guided in the feed direction to transverse guides of the gripper rails that are mounted in a longitudinally movable manner.
  • the drive disk for generating the opposite gripping and opening movements is a radial cam.
  • the transmission means for the transverse drive are two gearwheels which are arranged directly above said drive cam disk and which mesh with one another and engage in a rack which is firmly connected to a gripper rail and is guided transversely to the longitudinal extension of the gripper rail.
  • a cam follower cooperating with the drive cam mentioned is mounted peripherally on one of the toothed wheels which mesh with one another.
  • a rocker arm which is pivotably articulated about a device-fixed articulation axis which runs approximately parallel to the cam axis of rotation and is mounted by spring force and is mounted by spring force is held in contact with the cam disc and that the transmission means comprise an articulated gear with a deflection lever which can be pivoted by means of a thrust member which is articulated on the rocker arm at a distance from its fixed articulation axis about a bearing axis which is also fixed to the cam axis and from which the transverse to the Feed direction running gripper rail movements are derived.
  • the invention thus relates to the fact that instead of the gears used as transmission means in the previously known feed device, a rocker arm which supports the cam follower and an articulated transmission which is operatively connected to it via a thrust member and which is practically wear-free and thus impart play-free transmission of the drive movements derived from the drive cam disk.
  • the deflection lever has at least two lever arms extending in different directions from its bearing axis and to one of these lever arms the push link articulated at its other end to the rocker arm, on the other hand a handlebar for transmitting the drive movement to at least one gripper rail .
  • the handlebar articulated at one end to one of the lever arms of the deflection lever engages on a lifting frame which the gripper rail guides are included with the result that when the pivot lever is pivoted an upward and downward movement of the lifting frame and thus the gripper rails takes place.
  • the articulated gear for converting the drive movement derived from the cam disc into a common upward and downward movement of the gripper rails can also comprise a further two-armed bell crank which can be pivoted about a bearing axis fixed to the device by means of a link arm which is articulated on a lever arm of both bell levers and which is vertical guided lifting frame is operatively connected via a handlebar articulated on its other lever arm.
  • a drive designed in this way for lifting and lowering the gripper rails is characterized by better load distribution than in the embodiment with only one deflection lever.
  • canting and clamping can be effectively prevented if, after a further development, the two deflection levers which are operatively connected to one another via a handlebar are arranged on opposite sides of the rocker and approximately symmetrically to the latter.
  • cam follower is held in contact with the cam disc by means of at least one pneumatic cylinder acting on the lifting frame.
  • a pneumatic cylinder acting on the lever frame can also be arranged on opposite sides of the rocker and approximately symmetrically to it within the scope of the invention.
  • the lever arms of the deflection lever extend on opposite sides from the bearing axis thereof, and a link articulated on each of these lever arms is articulated directly on a gripper rail transverse guide.
  • the pneumatic cylinders used to press the cam followers onto the respective cam disc can advantageously be acted upon with pressure medium in a double-acting manner and can accordingly be reversed.
  • Such a design of the pneumatic cylinder makes it particularly easy to set up the feed device to the respective need.
  • the articulation point of the thrust member on the rocker can be changed in terms of its distance from its articulation axis, so that the stroke when closing and opening the gripper rails or when lifting and lowering can be adapted to the requirements of the respective application.
  • rocker arm with a plurality of bearing bores arranged at different distances from its articulation axis for the optional articulation of the thrust member is provided.
  • bearing bores for the optional articulation of the thrust member on the rocker are arranged on a circular arc piece with the articulation point of the other thrust member end on the bell crank as the center.
  • the thrust member is articulated on a sliding block which can be adjusted radially to the articulation axis fixed to the device and which can be accommodated in a longitudinally displaceable manner in a guide extending radially to the articulation axis and accordingly a stepless change in the articulation point of the thrust member and thus of the stroke of the gripper rails.
  • the sliding block is received on a threaded spindle which extends radially to the articulation axis of the rocker and is rotatably mounted on the latter.
  • the thrust member mediating the operative connection between the rocker and the deflection lever is adjustable in length.
  • This adjustability in length can be achieved in particular that one each on the rocker arm and on a lever arm of the bell crank Articulated thrust link connected to each other via a threaded rod and the distal ends of which are screwed into threaded holes which extend into the thrust link parts from their mutually facing end faces.
  • Another important embodiment of the invention is characterized by an at least largely rectilinear force flow from the cam follower via the rocker arm and via the transmission members of the articulated gearbox to the gripper rail guides.
  • the cam follower, the drive cam and the rocker have a common effective plane, so that no moments due to lateral offset can occur.
  • the transmission elements of the articulated gearbox which should extend in the common effective plane of the cam disc, the cam follower and the rocker or symmetrically to this effective plane and should be articulated to the rocker and / or to one another in the effective plane or symmetrically thereto.
  • the exemplary embodiment illustrated in the drawing is a feed device 10 for transporting workpieces from a processing station to a processing station following in the processing flow. Feed devices of this type are used in particular for workpiece transport from one operation stage to a subsequent operation stage in presses or for linking presses.
  • the feed device 10 shown in a side view in FIG. 1 has two gripper rails 11, 11 ', spaced apart and parallel to one another in the feed direction, which can be moved back and forth jointly in the feed direction, derived from a cam plate 12, 13, 14, perpendicular to the feed direction are essentially guided in phase with one another and together movable up and down.
  • the cams are rotatably received under the gripper rails on a common drive shaft 16 which extends longitudinally in the feed direction within a housing 15. This shaft and thus the cams are driven in a manner not shown, derived from a press synchronous with its drive.
  • transverse drive itself is shown for generating opposite-phase closing and opening movements.
  • This transverse drive comprises the radial cam 13 already mentioned, which is received in a rotationally fixed manner on the drive shaft 16, furthermore a rocker arm 21 which can be pivoted about an articulation axis 20 with a cam follower 22 held in contact with the radial cam disc and finally an articulated gear with a bearing axis 24 which is also fixed to the device , which extends in parallel to the drive shaft 16 receiving the cam disks, pivotable deflection lever 25 which is operatively connected to the rocker 21 via a thrust member 26.
  • cam disk 13 Arranged are the cam disk 13, which is held in a rotationally fixed manner on the drive shaft 16, and the cam disk which can be pivoted about it rocker 21 mounted about the articulation axis 20 symmetrically to the gripper rails 11, 11 ', which are accommodated in longitudinal guides (not shown) arranged on the gripper rail transverse guides 27, 27'.
  • the reversing lever 25 of the articulated gearbox for generating the closing and opening movements of the gripper rails has two lever arms 30, 31 which extend on opposite sides from the bearing axis 24.
  • the one push arm 26 is articulated to the one lever arm 31 with its other end, likewise, however, also a link 32 which acts directly on the gripper rail transverse guide 27.
  • the other lever arm 30 is operatively connected to the second gripper rail transverse guide 27 'via a further link 33.
  • the drive shaft 16 with the drive cam 13 received on it extends approximately in the middle between the gripper rail transverse guides 27, 27 ', the gripper rail transverse guide 27' with its one end engaging and articulated on the lever arm 30 of the bell crank 25 33 formed as double links for reasons to be explained below and guided past the rocker 21 on both sides.
  • the articulated on the lever arm 31 of the bell crank 25 and its pivoting about the bearing axis 24 mediating thrust member 26 is articulated with its end remote from the bell crank to a sliding block 35 which is received on a threaded spindle 36 which is approximately radial to the articulation axis 20 Swing arm 21 extends and is rotatably mounted on the latter.
  • the articulation point of the thrust member 26 on the rocker 21 is thus infinitely adjustable along the guide 34 of the rocker.
  • the piston rod 38 engages a pneumatic cylinder 40 articulated by means of a device-fixed articulation axis, the piston 41 of which can optionally be pressurized with pressure medium on one side or the other.
  • the cam follower 22 is thus held in contact with the cam 13.
  • FIG. 3 illustrates a rocker 21 'spaced on a circular arc piece 44, the center of which is formed by the articulation point of the thrust member 26' on the lever arm 31 of the bell crank 25 Holes 45, 45 ′, 45 ′′ arranged from one another, which selectively link the thrust member 26 to the rocker in different ways Distances from their articulation axis 20 'and thus allow a gradual adaptation of the closing and opening movements to the respective need.
  • the lifting drive illustrated in FIG. 6 for the joint lifting and lowering of the gripper rails 11, 11 ' has a lifting frame 48 which extends transversely to the feed direction and on which the gripper rail longitudinal guides 49, 49' are received so as to be transversely displaceable.
  • the linear drive like the transverse drive explained above in particular in connection with FIG. 2, comprises a radial cam disk 14 arranged on the drive shaft 16 in a rotationally fixed manner and a rocker arm 50 arranged directly above the cam disk, which is mounted about a pivot axis 51 running parallel to the cam disk axis of rotation and is provided with a cam follower 52 held in contact with the radial cam 14.
  • the lifting drive comprises an articulated gear mechanism with two deflection levers 54, 54 'arranged on opposite sides of the rocker 50, each approximately below the gripper rail longitudinal guides 49, 49', which can be pivoted about bearing axes 55, 55 'fixed to the device and extending parallel to the rocker pivot axis 51 and are each provided with two lever arms 56, 57 and 56 ', 57' which extend from the bearing axis on different sides.
  • the operative connection from the rocker arm 50 to the one bell crank 54 mediates at one end on the rocker arm and at its other end on the lever arm 57 of the Deflection lever 54 articulated thrust member 58.
  • the deflection lever 54 is operatively connected to the deflection lever 54 'via a link 60, which is articulated at one end to the lever arms 57, 57' and which, like the link 33 in the transverse drive, acts as a double link on both sides of the rocker arm is trained.
  • the other lever arms 56, 56 'of the two deflection levers 54, 54' are operatively connected via links 62, 62 'articulated to them on the one hand and the lifting frame 48 on the other hand, so that when the deflection lever is pivoted, the lifting frame 48 is derived from the rocker movements with the is moved vertically up and down on this gripper rail guides.
  • the thrust member 58 in the lifting drive illustrated in FIG. 6 is articulated with its one end to a sliding block 64 which is received on a threaded spindle 65 which is rotatably mounted on the rocker arm 50 and which allows the sliding block to be moved continuously in one Guide 66 approximately radially to the articulation axis 51 of the rocker arm and thus enables a stroke adjustment of the vertical movement of the gripper rails for the purpose of adaptation to the needs of the respective application.
  • the lifting drive also has two pneumatic cylinders 68, 68 'fixedly arranged in the device frame with pistons 69, 69' which can be acted upon on one side or the other and which are actuated by piston rods 70, 70 '. are firmly connected to the lifting frame 48.
  • the pneumatic cylinders are arranged on opposite sides of the rocker 50 and spaced on the outside in each case from the deflection levers 54, 54 'arranged approximately under the gripper rail guides, so that an essentially symmetrical attack of the piston rods 70, 70' operatively connected to the lifting frame is ensured.
  • the cam follower mounted on a gear was arranged in a parallel plane to the gear
  • the cam followers 22, 52 are mounted in fork-shaped receptacles of the rockers 21, 50 and accordingly the cam 13, the cam follower 22 and the rocker 21 arranged in one plane, as shown in FIG. 4. Accordingly, when the cam 22 rotates about its axis of rotation formed by the drive shaft 16, only moments about the articulation axis 20 on the rocker 21 triggered, but not moments directed transversely to the pivot axis of the rocker.
  • the rocker arm 21 is mounted about the articulation axis 20 which is fixed to the device and penetrates one leg of the fork-shaped area of the rocker arm in the manner shown in FIG. 5, so that a rocker arm bearing symmetrical to the plane of action of the rocker arm is present.
  • the lever arm 57 of the bell crank 54 is divided in the direction of the articulation fixed by the bearing axis 55, and the end of the thrust member 58 articulated thereon is fork-shaped in such a way that the one end of it on the lever arm 55 of the bell crank and with its other end on the lifting frame 48 articulated handlebar 62 extends through the fork-shaped end of the thrust member.
  • FIG. 7, in accordance with FIG. 8, also illustrates the symmetrical articulation of both the thrust member 58 with its fork-shaped end on the lever arm 57 and the articulation of the two parts of the double link 60 on the aforementioned lever arm, with respect to the width of the bell crank 54, and the like the central articulation of the link 62 operatively connected to the lifting frame 48 to the other lever arm 56 of the bell crank. Accordingly, there is a central transmission of the vertical movements derived from the pivoting movements of the bell crank 54 and transmitted via the link 62 to the lifting frame 58.
  • the transmission ratios are configured in a corresponding manner on the second deflection lever 54 '.
  • Fig. 7 also illustrates the interaction of the transverse drive with the linear drive.
  • the device part with the gripper rail transverse guides movable transversely to the feed path is arranged directly adjacent to the device part with the lifting drive.
  • the transverse guide 27 arranged on one side is illustrated, on which an angular guide piece 72 is fixedly arranged, which has an arm 73 projecting beyond the lifting frame.
  • This arm has a vertical guide, through which a carrier 74 for the gripper rail longitudinal guide 49 extends.
  • the arrangement is designed accordingly.
  • the length-adjustable thrust member 26 ′′ illustrated in FIG. 9 consists of a thrust member part 126, 127 articulated on the sliding block 35 of the thrust member 21 and the lever arm 31 of the bell crank 35, and a threaded rod 128, the distal ends of which are screwed into threaded bores which are screwed in extend from the mutually facing end faces into the thrust link parts 126, 127.
  • the threaded rod 128 is secured in the illustrated setting position by means of a screwed-on lock nut 129 which is tensioned relative to the thrust member part 126.
  • the threaded rod 128 has key attachment surfaces 130 approximately in the middle of its length, via which a suitable key rotates the threaded rod in a simple manner, and thus one Length adjustment of the push member 26 '' can be made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Manipulator (AREA)
  • Reciprocating Conveyors (AREA)
EP93106330A 1992-07-16 1993-04-20 Dispositif d'avancement pour le transport par étapes de matériel et/ou de pièces à usiner sur ou vers des machines de production fonctionnant par intermittence Expired - Lifetime EP0578928B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4223340 1992-07-16
DE4223340A DE4223340A1 (de) 1992-07-16 1992-07-16 Vorschubeinrichtung zum schrittweisen Material- und/oder Werkstücktransport an bzw. in intermittierend arbeitenden Produktionsmaschinen

Publications (2)

Publication Number Publication Date
EP0578928A1 true EP0578928A1 (fr) 1994-01-19
EP0578928B1 EP0578928B1 (fr) 1997-02-12

Family

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Application Number Title Priority Date Filing Date
EP93106330A Expired - Lifetime EP0578928B1 (fr) 1992-07-16 1993-04-20 Dispositif d'avancement pour le transport par étapes de matériel et/ou de pièces à usiner sur ou vers des machines de production fonctionnant par intermittence

Country Status (4)

Country Link
US (1) US5346055A (fr)
EP (1) EP0578928B1 (fr)
DE (2) DE4223340A1 (fr)
ES (1) ES2098579T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108971307A (zh) * 2018-07-19 2018-12-11 彭守晔 一种多功能自动化冲点装置
CN110788200A (zh) * 2019-11-06 2020-02-14 陈文清 一种方便上料的不锈钢板冲裁机

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5443101A (en) * 1993-12-06 1995-08-22 Fierkens; Richard H. J. Modular electromechanical press and method therefor
EP0846305A4 (fr) 1996-06-21 2001-04-25 Norand Corp Lecteur de codes trop longs effectuant le decodage d'images codees
US5818027A (en) * 1996-11-22 1998-10-06 Intermec Corporation Control circuit for a bar code scanner
US5983696A (en) * 1998-03-02 1999-11-16 John H. Maher Transfer system
DE102012110661B4 (de) * 2012-11-07 2014-06-26 Progress-Werk Oberkirch Ag Kurvenschiene für ein Transfersystem, sowie Umformautomat

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133199A (en) * 1977-02-26 1979-01-09 Kabushiki Kaisha Komatsu Seisakusho Transfer mechanism for forging machines
DE2206407B2 (de) * 1972-02-11 1979-03-22 Gesellschaft Fuer Pressen-Automation Mbh, 7500 Karlsruhe Vorschubeinrichtung in Pressen
EP0224652A1 (fr) * 1985-09-09 1987-06-10 Aida Engineering Ltd. Dispositif d'avance des pièces dans une presse-transfert
EP0256523A1 (fr) * 1986-08-16 1988-02-24 Adolf Wünsch Transporteur
DE3832499A1 (de) * 1988-09-24 1990-03-29 Schuler Gmbh L Presse mit greiferschienen

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US1784812A (en) * 1928-04-23 1930-12-16 Surface Comb Co Inc Furnace and conveyer therefor
US3620381A (en) * 1970-04-06 1971-11-16 Stuart H Mccaughey Horizontal high-speed transfer
DE2349126C2 (de) * 1973-09-29 1982-07-29 Günter 7500 Karlsruhe Zierpka Vorschubeinrichtung zum schrittweisen Material- und/oder Werkstücktransport
GB1435028A (en) * 1973-11-29 1976-05-12 Hitachi Shipbuilding Eng Co Multi-station transfer presses
DE2852929C2 (de) * 1978-12-07 1984-08-09 Günter 7500 Karlsruhe Zierpka Vorschubeinrichtung in Pressen
DD277853A1 (de) * 1988-12-09 1990-04-18 Warnke Umformtech Veb K Verstellvorrichtung zur weiteneinstellung der greiferschienen einer transferpresse

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2206407B2 (de) * 1972-02-11 1979-03-22 Gesellschaft Fuer Pressen-Automation Mbh, 7500 Karlsruhe Vorschubeinrichtung in Pressen
US4133199A (en) * 1977-02-26 1979-01-09 Kabushiki Kaisha Komatsu Seisakusho Transfer mechanism for forging machines
EP0224652A1 (fr) * 1985-09-09 1987-06-10 Aida Engineering Ltd. Dispositif d'avance des pièces dans une presse-transfert
EP0256523A1 (fr) * 1986-08-16 1988-02-24 Adolf Wünsch Transporteur
DE3832499A1 (de) * 1988-09-24 1990-03-29 Schuler Gmbh L Presse mit greiferschienen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108971307A (zh) * 2018-07-19 2018-12-11 彭守晔 一种多功能自动化冲点装置
CN108971307B (zh) * 2018-07-19 2020-04-10 陈浩 一种多功能自动化冲点装置
CN110788200A (zh) * 2019-11-06 2020-02-14 陈文清 一种方便上料的不锈钢板冲裁机
CN110788200B (zh) * 2019-11-06 2021-02-19 杭州丰园搪瓷配件有限公司 一种方便上料的不锈钢板冲裁机

Also Published As

Publication number Publication date
US5346055A (en) 1994-09-13
ES2098579T3 (es) 1997-05-01
DE59305433D1 (de) 1997-03-27
DE4223340A1 (de) 1994-01-20
EP0578928B1 (fr) 1997-02-12

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