US3880034A - Sequential stamping of strip material - Google Patents

Sequential stamping of strip material Download PDF

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Publication number
US3880034A
US3880034A US466581A US46658174A US3880034A US 3880034 A US3880034 A US 3880034A US 466581 A US466581 A US 466581A US 46658174 A US46658174 A US 46658174A US 3880034 A US3880034 A US 3880034A
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United States
Prior art keywords
strip
platform
longitudinal axis
median
working device
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.)
Expired - Lifetime
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US466581A
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English (en)
Inventor
Roger Sapolsky
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Gulf and Western Manufacturing Co
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Gulf and Western Manufacturing Co
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Publication of US3880034A publication Critical patent/US3880034A/en
Assigned to BARCLAYS AMERICAN/BUSINESS CREDIT, INC. reassignment BARCLAYS AMERICAN/BUSINESS CREDIT, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: E.W. BLISS COMPANY
Anticipated expiration legal-status Critical
Assigned to SHAWMUT CAPITAL CORPORATION reassignment SHAWMUT CAPITAL CORPORATION SALE/TRANSFER OF SECURITY INTEREST TO A NEW SECURED PARTY Assignors: BARCLAYS BUSINESS CREDIT, INC.
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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working
    • B21D28/08—Zig-zag sequence working
    • 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
    • B21D43/021—Control or correction devices in association with moving strips
    • B21D43/023—Centering devices, e.g. edge guiding
    • 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
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0505—With reorientation of work between cuts
    • Y10T83/051—Relative to same tool
    • 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
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4486—With variable direction of work-feed from cycle to cycle
    • Y10T83/4488—In one of certain selected directions
    • 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
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4523—With means to vary number of work-feed increments between tool strokes
    • 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
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4534—Unequal work feed increments in recurring series
    • 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
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4539—Means to change tool position, or length or datum position of work- or tool-feed increment
    • 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
    • Y10T83/00—Cutting
    • Y10T83/485—Cutter with timed stroke relative to moving work
    • Y10T83/494—Uniform periodic tool actuation
    • Y10T83/50—Reciprocating tool

Definitions

  • the punch which generally works in conjunction with a massive press. is positioned in such a manner that its vertical longitudinal axis is fixed. while the ribbon of flexible and thus more manageable material is displaced with respect to the fixed axis of the punch. said displacement being either to an axis parallel to the median longitudinal axis of the ribbon.
  • said ribbon to be stamped out in identical successive sections so as to leave the ribbon with a number of identical holes that follow each other in regular intervals along axes which are parallel to the longitudinal axis of the ribbon; or as is most often the case said movement is first parallel and then perpendicular or at an angle to the median longitudinal axis of the ribbon. a procedure which makes it possible to stamp successive sections and.
  • afterstamping leaves the ribbon with two rows of holes which. in each row. are aligned parallel to the median axis of the ribbon. while either of the two rows is offset from the third row either on a perpendicular to said median axis, or at an angle to the axis, in a predetermined direction.
  • these stamping procedures make it possible to unroll only one ribbon instead of two, a fact which permits considerable timesavings, since the number of new ribbons to be mounted on the press is thus cut in half.
  • the invention accordin gly comprises the several steps and the relation of one or more of such steps with respect to each of the others. and the apparatus embodying features of construction. combinations of elements and arrangement of parts which are adapted to effect such step, all as exemplified in the following detailed disclosure, and the scope of the invention will be indicated in the claims.
  • the present invention improves the production capacity of known presses by providing a device which feeds a ribbon to a fixed-axis punch working in conjunction with the press.
  • the ribbon is fed in successive sections to the punch for stamping.
  • the feeding process occurs in such a manner that the total width of the ribbon is less than the sum of the transverse widths of the stamped-out pieces, so that the proportion of the punched-out surface of the ribbon with respect to its total surface is larger than that obtained with previously known devices. thus achieving savings of material.
  • the invention permits less frequent ribbon changes in the corresponding unrolling device and thus results in less frequent down-time in the press itself.
  • the apparatus according to the invention is designed to feed a strip of material to a punch which has a fixed vertical axis and is mounted on the bedplate ofa press which drives the punch.
  • the strip of material is in the form of a ribbon which has been previously rolled-up by the coiling component of a strip-feed apparatus which unrolls the ribbon in successive steps and works in conjunction with the bedplate of the press.
  • the strip-feed apparatus comprises a horizontal platform. the surface of which supports and holds the partly unrolled ribbon.
  • the platform is equipped to guide the ribbon in displacements that are parallel to the ribbon longitudinal axis. and in successive steps of a predetermined value which is a function of the width of the ribbon.
  • the horizontal platform is horizontally movable in a direction perpendicular to the longitudinal axis of the ribbon and is equipped for this purpose with guiding and driving means.
  • the platform is thus capable of moving periodically. cyclically and successively to three different fixed positions. namely a first extreme position. a second extreme position and a third median intermediary position between the two preceding ones.
  • a horizontal die-holding platform is fixed with re spect to the bedplate of the press and is adapted to receive the ribbon when the latter leaves the movable horizontal platform.
  • the die-holding platform is located downstream (in regard to the direction of the ribbon feed) ofthe movable platform lllSLlCll a manner as to face the punch and is in a plane which is an extension of the horizontal surface of the movable platform.
  • the strip of material is located on the fixed platform after leaving the movable platform for the purpose of being stamped by the punch.
  • a means is provided to synchronize and coordinate the movements of the movable horizontal platform. the ribbon-feed device and the punch so that when the movable platform is displaced from its first to its second extreme position, the ribbon is firmly held on the movable platform while continuing to be fed out of the feeding device. Accordingly during the displacement of the movable platform from its second to its third or median position, the ribbon advances simultaneously by a distance equal to one incremental step and, during the ribbons return from the third or median position to its first extreme position. the ribbon also advances by one step. The movable platform remains stationary in each of these three positions when the position is reached, and resumes its movement towards the next position as soon as the punch has perforated the part of the ribbon positioned on the fixed platform facing the punch.
  • the drive mechanism of the movable horizontal platform preferably consists of a double-action hydraulic jack.
  • the median extended position of the jack shaft corresponds to the intermediary position of the movable horizontal platform. while the extreme positions of the platform are obtained one by the retraction. and the other by the extension of the shaft of said jack.
  • a hydraulic-pressure blocking jack is positioned parallel to the drive jack for the movable platform.
  • the shaft of the blocking jack has a stop plate mounted at the terminal end. and its length is such that when the movable platform is moved from its second extreme position to the median position. the blocking jack shaft is in its extended position. The movable platform comes to rest against the stop plate and is thus held precisely in the median position. When the movable platform returns from its median position to its first extreme position. the shaft of the blocking jack is pulled back.
  • the movements of the blocking jack are synchronized and coordinated with the movements of the horizontal platform. the strip of material. and the punch. in such a manner that when the platform is in its median position.
  • the return movement of the punch to its initial position acts at the same time to retract the shaft of the drive jack and of the shaft of the blocking jack.
  • the return of the punch to its initial rest position causes at the same time an extension of the shaft of the drive jack and an extension of the shaft of the blocking jack to positions which said shafts will retain until the mov able platform returns to its median position.
  • the movable horizontal platform preferably incorporates at least one assembly consisting of two shock absorbers. each linked to the platform and symmetric with each other about the longitudinal median plane of symmetry of said platform.
  • the exterior end of the shaft of each shock absorber is equipped with a stop plate. one of which cooperates at a first extreme position of the platform with a first fixed stop plate attached to the bedplate of the machine. said first fixed stop plate being adjustable by means of a first adjusting device.
  • Theothe; stop plate cooperates at a second extreme position of the movable platform with a second fixed stop plate attached to the bedplate of the ma chine. said second fixed stop plate being adjustable by means of a second adjusting device which. in turn. cooperates with the first adjusting device in such a manner that the two fixed stops remain symmetrical with respect to each other.
  • the movable horizontal platform also preferably incorporates a third shock absorber linked to said platform and having a shaft which is equipped at its exterior end with a stop plate.
  • This stop plate is located opposite the terminal stop plate of the shaft of the jack which blocks the movable platform in its median position and cooperates therewith in said median position.
  • FIG. 1 is a schematic side elevation view of an apparatus for stamping a strip of sheet metal in accordance with the invention
  • FIG. 2 is an enlarged top plan view of the movable platform of the apparatus shown in FIG. 1;
  • FIG. 3 is a top plan view of the movable platform showing the platform is in a first extreme position.
  • FIG. 4 is a top plan view of the movable platform in a second extreme position
  • FIG. 5 is a top plan view of the movable platform in a median position
  • FIG. 6 is a plan view of a section of a strip after stamping in accordance with the invention.
  • the apparatus of the invention is preferably designed for perforating a strip of ma terial such as sheet metal. and comprises :1 preferably horizontal platform I mounted on a bedplate B of a press equipped with a cutting punch P which is axially movable along a fixed axis A-A. Platform 1 acts to support the strip 6 which is fed to the platform along the strips longitudinal axis XX. Platform 1 is movable by horizontal displacement perpendicular to the longitudinal axis X-X and thus perpendicular to the direction of movement of the strip. its movements alternating successively from one side of axis X-X to the other.
  • Strip 6 is continuously unrolled from a drum T around which it has previously been rolled. and which is part ofa feeding device. Strip 6 may be guided during feeding by appropriate, known guide devices (not shown) attached to the press. until the strip reaches platform 1 upon which it comes to rest in the plane of said platform. The strip is also guided laterally by appropriate. known guide devices such as slides or assemblies of vertical rollers (not shown) whose lateral spacing is adjustable in such a manner that they can be adjusted to the width of the strip being fed. After being positioned on platform I. strip 6 is held between two rollers Ia and lb whose axes are parallel to each other and perpendicular to axis X-X. Rollers la and lb work in conjunction with platform I.
  • Rollers Ia and lb may be components of any of a number of known devices for feeding strip incrementally. as for example a pendulum and coasting wheel type which operates in such a manner that when said coasting wheel is in its blocking position. the sheet metal strip is maintained in a fixed position. the rollers are blocked and tie sheet metal is firmly held against platform I while strip 6 is being fed between drum T and rollers la and lb.
  • rollers la and lb are driven in rotation. they cause strip 6 to advance by one step on the platform before again being blocked. and so forth.
  • the rate of feed of strip 6 and its rate of advancement on platform 1 are coordinated in such a manner that the average amplitude of the loop formed in strip 6 between drum T and rollers la and lb remains essentially constant.
  • Horizontal platform I is transversely movable by at least one double-action jack. preferably of the hydraulic type. attached to bedplate B of the press and fixed with respect to it. whereby the movable shaft of said double-action jack may operate in conjunction with the platform.
  • the longitudinal axis of the shaft is preferably perpendicular to. or in a perpendicular plane with. the axis of feed of the strip.
  • platform 1 is preferably guided in a horizontal plane by slides 4 of a conventional type. which are attached to the bedplate of of the press. Most preferably. however. the transverse movements of platform 1 are effected by two identical, double-action hydraulic jacks 2 and 5 which may be located on the same side of the platform.
  • platform 1 is located at the median position of shafts 3 and 7 of drive jacks 2 and 5. that is to say at that position in which the shafts of the drive jacks are halfway extended. Since the latter position of the shafts cannot always be achieved in an absolutely precise manner. and so as to counteract the slight imprecision resulting therefrom.
  • a third positioning jack I1 is placed between jacks 2 and 5. preferably midway between the two.
  • Positioning jack I1 is preferably of the double-action type. the end of its shaft 12 being equipped with a stop plate I3. The length of shaft 12 is equal to half the length of shafts 3 and 7 of drive jacks 2 and 5. and jack II is positioned in such a manner that when shaft 12 is completely extended.
  • stop plate 13 cooperates with the adjacent lateral edge of horizontal platform I and keeps the platform blocked in its third or median position (FIG. 5).
  • platform I is brought back to its first position (FIG. 3). the retraction of shafts 3 and 7 causes the introduction of fluid into the forward chamber ofjack 11 and the evacuation of fluid from the rear chamber thereof. resulting in complete retraction of shaft I2 of jack 11.
  • That part of strip 6 which extends downstream (in the direction of strip feed) of platform I rests on a fixed level surface (not shown) consisting. for example. of a second horizontal platform.
  • the second platform is fixed with respect to bedplate B of the press and linked to it by any known appropriate means. and is also on the same plane as the surface of movable platform 1.
  • the median axis of the fixed platform coincides with that of movable platform I when the latter is in its median position and. as mentioned above. is located in the vertical plane that runs through the axis of platform 1 and thus through the longitudinal axis of strip 6.
  • the fixed platform preferably contains a contoured die which corresponds to the contours of punch P. the contours commonly being. for example. circular in shape as shown on the drawings.
  • the vertical plane running through the fixed axis A-A of punch P intersects the plane of strip 6 along two axes.
  • YY and 2-2 which. as shown in FIG. 6. are parallel to the median longitudinal axis X-X and lo cated on either side at an equal distance.
  • the locations of axis YY and 2-2 are matched to the punch diameter in such a manner that. in each of the corresponding positions of movable platform I, the apparent contour of the hole that is to be punched out which is the orthogonal projection of the apparent contour of the punch upon the strip of material is tangential or essentially tangential with the corresponding edge of the strip 6.
  • strip 6 as in the shape of circular plates. is performed in the following manner. With movable platform I immobolized in its first extreme position as shown in FIG. 3. strip 6 is itself immobilized in such a position that the axis A-A (FIG. I of punch P intersects the axis YY. Punch P is then actuated to perforate strip 6 in the shape of a circle which is essentially tangential with respect to the corresponding edge of the strip.
  • movable platform I is indexed to its second extreme position as shown in FIG. 4. in which strip 6 is presented to punch P in such a manner that the fixed axis AA of punch P intersects the axis ZZ.
  • Punch P is again actuated to perforate strip 6 in the shape ofa circle which is essentially tangential with the opposite edge of the strip. that is the edge opposite the one perforated in the preceding step.
  • the second perforation is spaced from the first along an axis that is perpendicular to the longitudinal axis of the strip and equal to the distance between axis YY and axis Z-Z.
  • strip 6 is advanced along axis XX by a distance that is slightly greater than the radius of one perforation; this constitutes one forward increment.
  • Platform 1 is then indexed to its third position (FIG. 5] in which the fixed axis A-A of punch P intersects longitudinal axis X-X of strip 6. When this position is reached.
  • punch P is again actuated to cut from strip 6 a circular plate having the same diameter as the preceding ones.
  • the circular contour of the latter perforation as shown in FIG. 5. is tangential or nearly tangential with the circular contours of the perforations made in strip 6 by the two preceding operations.
  • strip 6 is again advanced by one increment.
  • Platform l is brought back to its first extreme position from which a new three-plate stamping cycle is initiated in the same manner as described above.
  • a new plate is punched out tangentially or nearly tangentiallywith the corresponding edge of the strip. and the circular contour of the perforation left by the punch is accordingly tangential or nearly tangential with the corresponding edge of the strip. with the circular contour of the perforation made when platform I was in the preceding position. and with the circular contour of the perforation left by the punching step which occurred at the beginning of the preceding cycle.
  • the circular contours of all adjacent perforations are tangential or nearly tangential with each other. and are arranged in such a manner that the circles which correspond to the perforations made in the successive positions of the carriage. have their centers arranged in rows.
  • This arrangement results from the fact that the centers of the circles with equal radiuses are arranged in groups of three positioned at the apexes of a network of equilateral triangles.
  • the proportion of useful surface that is to say the ratio of punched-out surface of the strip. with respect to the total surface of said strip. is the optimum that can possibly be achieved when cutting out circular sections along three adjacent longitudinal lines.
  • strip 6 is subjected to some elastic flexing in its plane. but such a flexing is easily accommodated by the loop in the strip which forms be- 7 tween drum T and rollers la and lb as shown in FIG.
  • the apparatus of the invention is equipped with a number of conventional mechanisms designed to automatically coordinate and synchronize these movements with each other and with those of the punch.
  • the strip feed is halted when the shafts of the drive jacks of the platform move from their retracted positions to their respective extended positions to cause the platform to index from its first to its second extreme position.
  • the shaft of the positioning jack moves at the same time to its extended position.
  • the above mentioned synchronization mechanisms cause the simultaneous incremental advance of the strip and the retraction of the drive jacks to the median index position of the platform. As soon as the latter two movements are accomplished. the strip is punched in its median position. When this punching operation is completed and the punch has returned to its initial position. the synchronization mechanisms cause the simultaneous and complete retraction of the shafts of all three jacks. this movement bringing the platform (and thus the strip) back to its first extreme position. from where the punching process on the strip continues automatically and cyclically in the abovedescribed manner.
  • the width of the strip that is to be punched must be selectively chosen with relation to the desired diameter of the circular plates, said diameter. in turn. defining the forward incremental feed of the strip.
  • the strip-guide devices which are mounted on the movable platform and which have an adjustable lateral span. allow the platform to accommodate strip of different widths and to center such strip precisely. These devices also adjust the incremental feed to the width of the strip by appropriately adjusting the corresponding elements of the synchronization devices which coordinate and synchronize the movements of the strip-supporting and guiding platform together with those of the feed device for the strip.
  • the apparatus of the invention is equipped with shock absorbers designed to suppress vibrations in the movable platform at either of the extreme positions thereof.
  • shock absorbers 14a and 14b (FIG. 2) are of conventional construction and are conventionally secured. for example. underneath the platform.
  • Shock absorbers 14a and 14b are preferably identical and are placed symmetrically about a plane which coincides with the median plane of the platform. that is to say about the vertical plane which runs through the X-)( axis when the platform is in its median position (see FIG. 2).
  • the exterior ends of the shafts lSu and 15b thereof are equipped with stop plates 16a and 1612 which come to rest against corresponding stop plates 17a and 17b secured to the bedplate of the press.
  • Plates 17a and I7] are adjustably located at predetermined positions which are determined by the amplitude of the transverse movement of the movable platform. said amplitude being in turn a function of the width of the strip to be punched. Stop plates 17a and [7b are positioned in such a manner that they remain symmetrical with each other about the plane which coincides with the median plane X-X of the platform when the latter is in its median position.
  • Each of the two stop plates [70 and 17b is adjusted to its desired position by conventional means. for example. of the guided screw and nut" type.
  • the vibrations occuring in the movable platform when it moves to a median position are also preferably dampened by equipping the platform with a shock absorber l8 similar to the ones described above.
  • Shock absorber 18 is secured to the platform and positioned in such a manner that the axis of its shaft 19 which ends in a stop plate 20 is located opposite of stop plate 13 of shaft 12 of jack II and coincides with the axis of the latter.
  • the two adjusting devices for the stop plates cooperate with each other by means of a common drive element which imparts equal speeds but opposite directions of rotation to the drive screws of the guided nuts connected to the corresponding stop plates 17a and 17b.
  • Apparatus for feeding and indexing continuous strip relative to a material working device such as a punch or the like whereby said device may sequentially operate along three parallel longitudinal axes of said strip comprising. in combination:
  • indexing means comprising l. a platform for supporting said strip.
  • the first said position being one in which a first longitudinal axis of said strip lying to one side of the median longitudinal axis thereof is aligned with said material working device.
  • the second said position being one in which a second longitudinal axis of said strip lying to the other side of the median longitudinal axis thereof and equidistant therefrom is aligned with said material working device.
  • the third said position being one in which the median longitudinal axis of said strip is aligned with said material working device.
  • said drive means comprises at least one hydraulic drive jack. the shaft of which is connected with said platform. said first and second positions of said platform being achieved at one or the other of the fully extended or fully retracted positions of said shaft. said third position of said platform being achieved at the median extended position of said shaft.
  • Apparatus as defined in claim 2 including two such hydraulic jacks. symmetrically connected to said platform about a median plane oriented transverse to the direction of strip feed thereover and parallel to the direction of platform movement.
  • Apparatus as defined in claim 2 including positioning means affording precise location of said platform in said third. median position.
  • said positioning means comprises a hydraulic positioning jack mounted parallel to said drive jack. the end of the shaft of said positioning jack when fully extended being in position to make contact with said platform. and being of a length to accurately stop said platform in said third. median position.
  • Apparatus as defined in claim 1 including shock absorbing means interacting with said platform at each of said three positions to suppress vibrations resulting from the abrupt stop of said platform at each said position.
  • Apparatus for feeding and indexing continuous strip relative to a stamping device whereby said device may sequentially operate along three parallel longitudinal axis of said strip. comprising. in combination:
  • indexing means comprising l. a platform for supporting said strip.
  • drive means comprising at least one hydraulic drive jack. the shaft of which is connected with said platform. for sequentially and cyclically indexing said platform between three positions.
  • the first said position being one in which a first longitudinal axis of said strip lying to one side of the median longitudinal axis thereof is aligned with said device.
  • the second said position being one in which a second longitudinal axis of said strip lying to the other side of the median longitudinal axis thereof and equidistant therefrom is aligned with said material working device.
  • said first and second positions being achieved at one or the other of the fully extended or fully retracted positions of said shaft.
  • the third said position being one in which the median longitudinal axis of said strip is aligned with said device. said third position being achieved at the median extended position of said shaft.
  • D. shock absorbing means interacting with said platform at each of said three positions to suppress vibrations resulting from the abrupt stop of said platform at each said position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
US466581A 1973-05-09 1974-05-03 Sequential stamping of strip material Expired - Lifetime US3880034A (en)

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FR7316767A FR2228554B1 (enrdf_load_stackoverflow) 1973-05-09 1973-05-09

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US3880034A true US3880034A (en) 1975-04-29

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Cited By (9)

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US3999919A (en) * 1974-05-16 1976-12-28 Heijiro Fukuda Apparatus for continuously producing resinoid wheels
US4144783A (en) * 1976-03-15 1979-03-20 Amada Company, Limited Apparatus for blanking sheet materials
US4610380A (en) * 1984-10-26 1986-09-09 Pressmate, Inc. Stagger feeder
US4708043A (en) * 1985-08-07 1987-11-24 The Cly-Del Manufacturing Company Adjustable cam indexing feed apparatus
US5624369A (en) * 1994-12-15 1997-04-29 Griffin Automation, Inc. Method and apparatus for forming slotted and creased box blanks
US6675681B1 (en) * 1999-05-03 2004-01-13 Gebrueder Leonhardt Gmbh & Co. Kg Method of processing sheet-like workpieces in a strip-shaped manner
US6688201B1 (en) * 1999-08-25 2004-02-10 Matsushita Electric Industrial Co., Ltd. Thin sheet punching device
RU2304481C2 (ru) * 2005-06-14 2007-08-20 Открытое акционерное общество "Новосибирский завод химконцентратов" Способ последовательной многорядной вырубки и штамп для его осуществления
CN107552664A (zh) * 2017-09-04 2018-01-09 安徽省宁国市东波紧固件有限公司 一种自动摆头下料的挡圈加工设备

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DD135972A3 (de) * 1976-05-14 1979-06-13 Zaumseil Hans Juergen Verfahren und schneidwerkzeug zur herstellung von elektromotorenblechen
CA1188213A (en) * 1980-12-15 1985-06-04 Shigeyoshi Kouno Blanking apparatus
GB8420343D0 (en) * 1984-08-10 1984-09-12 Workman J Metal pressing and stamping
US4923139A (en) * 1988-09-26 1990-05-08 Redicon Corporation Coil feeding system, mehod and apparatus

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US3248978A (en) * 1963-07-24 1966-05-03 Karlsruhe Augsburg Iweka Method and apparatus for punching flexible strip stock
US3691887A (en) * 1970-06-01 1972-09-19 Hurco Mfg Co Inc Automatic shearing method and apparatus

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US1053694A (en) * 1910-04-29 1913-02-18 Union Paper Company Feeding mechanism for blanking and forming machines.
US3248978A (en) * 1963-07-24 1966-05-03 Karlsruhe Augsburg Iweka Method and apparatus for punching flexible strip stock
US3691887A (en) * 1970-06-01 1972-09-19 Hurco Mfg Co Inc Automatic shearing method and apparatus

Cited By (9)

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US3999919A (en) * 1974-05-16 1976-12-28 Heijiro Fukuda Apparatus for continuously producing resinoid wheels
US4144783A (en) * 1976-03-15 1979-03-20 Amada Company, Limited Apparatus for blanking sheet materials
US4610380A (en) * 1984-10-26 1986-09-09 Pressmate, Inc. Stagger feeder
US4708043A (en) * 1985-08-07 1987-11-24 The Cly-Del Manufacturing Company Adjustable cam indexing feed apparatus
US5624369A (en) * 1994-12-15 1997-04-29 Griffin Automation, Inc. Method and apparatus for forming slotted and creased box blanks
US6675681B1 (en) * 1999-05-03 2004-01-13 Gebrueder Leonhardt Gmbh & Co. Kg Method of processing sheet-like workpieces in a strip-shaped manner
US6688201B1 (en) * 1999-08-25 2004-02-10 Matsushita Electric Industrial Co., Ltd. Thin sheet punching device
RU2304481C2 (ru) * 2005-06-14 2007-08-20 Открытое акционерное общество "Новосибирский завод химконцентратов" Способ последовательной многорядной вырубки и штамп для его осуществления
CN107552664A (zh) * 2017-09-04 2018-01-09 安徽省宁国市东波紧固件有限公司 一种自动摆头下料的挡圈加工设备

Also Published As

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FR2228554B1 (enrdf_load_stackoverflow) 1977-02-11
FR2228554A1 (enrdf_load_stackoverflow) 1974-12-06

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