US3668959A - Process and device for advancing and simultaneously centering sheet material - Google Patents

Process and device for advancing and simultaneously centering sheet material Download PDF

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Publication number
US3668959A
US3668959A US3668959DA US3668959A US 3668959 A US3668959 A US 3668959A US 3668959D A US3668959D A US 3668959DA US 3668959 A US3668959 A US 3668959A
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US
United States
Prior art keywords
sheet material
feed
scroll
cutter
hunting
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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English (en)
Inventor
Wolfgang Max Egon Richter
Edgar Lab
Hans Werner Sieblist
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.)
Ardagh Metal Beverage Germany GmbH
Original Assignee
Schmalback Lubeca 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 Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
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Publication of US3668959A publication Critical patent/US3668959A/en
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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
    • B21D43/021—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
    • Y10T83/04—Processes
    • Y10T83/0524—Plural cutting steps
    • Y10T83/0538—Repetitive transverse severing from leading edge of work
    • 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
    • Y10T83/0524—Plural cutting steps
    • Y10T83/0538—Repetitive transverse severing from leading edge of work
    • Y10T83/0567—Nonrectilinear cutting
    • 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
    • Y10T83/4564—With means to produce plurality of work-feed increments per tool cycle
    • Y10T83/4567—Including supplemental work-feed means

Definitions

  • the feed mechanism includes a first feed disposed in advance of the scroll cutter and a second feed between the scroll cutter and a centering stop. Each feed has associated therewith guide means engaging the opposite edges of the sheet material with one half of each guide means being fixed and the other half being resiliently mounted.
  • the feed mechanism includes rollers which rotate to advance the sheet material and which are hunted axially thereof so as to transversely hump the sheet material in cooperation with the guide means so as to perfect the centered feeding of the sheet material.
  • the invention relates to a process and the device for feeding and simultaneously centering sheet material, especially coil sheet metal, toward a fixed centering stop on the side of the front edge of the sheet metal as an initiation of the true-to-size cutting of the coil sheet metal in a scroll cut to be formed in a conventional manner into sheets for further processing into stamped metal parts with cutting surfaces curved on all sides, and with the coil sheet metal being fed through the use of a coarse and fine feed separately transporting and
  • the precision of the sheets can be defined by four values: a
  • a means for fulfillment for a part of the above mentioned values is the feed of the sheet. It consists generally of two phases, namely a coarse feed and a fine feed. Both movements are executed, generally speaking, with two rubberized feed rollers, whereby the pair of rollers for the fine feed lies directly in ,front of the fixed stops for the end of the sheet. After the sheet material, whose free edge already shows one scroll cut, has been moved by the coarse feed up to a certain distance in front of the solid stop, the edge of the sheet scroll is centered in two fixed stops during the subsequent fine feed.
  • the lateral stops also serve as an auxiliary elements for the lateral guidance of the sheet.
  • the centering effect will be increased through the fact that, according to a further characteristic of the invention, the hunting of the sheet transversely to its feed direction takes place functionally independently of the feed.
  • the device to carry out the process in accordance with this invention includes a cutting unit having associated therewith a coarse and a fine feed, each including a pair of conveying rollers extending transversely to the running direction of the sheet and a pair of lateral load rollers arranged in the area of the conveying rollers, said rollers lying on both sides of the sheet and arranged behind the conveying rollers, and a fixed centering stop at the front edge of the sheet arranged in front of the fine feed.
  • the device through the fact that the conveying rollers of the coarse and the fine feed are shiftable in an axial direction, and that the guide rollers at the side of the sheet of the coarse feed are arranged one cuttinglength in front of the cutting unit and can be automatically moved from their sheet guiding position.
  • the axial shiftability of the conveying rollers permits the hunting of the sheet transversely to its feed direction, so that both the movable lateral guide rollers as well as the fixed stop can correct the position of the sheet during feed in.
  • the arrangement of the guide roller of the sides of the sheet of the coarse feed one cutting length in front of the cutting unit as well as the fact that they can be released automatically from their guide position will avoid a static find during the positioning of the sheet within the cutting unit.
  • the fine feed is controlled via a radial curve and is applied through a pressure spring.
  • the lateral load rollers of the coarse feed are connected with pistons guided hydraulically, pneumatically or in some similar manner in cylinders. This arrangement makes it possible, furthermore, in the case of other widths of sheets of the coils to adapt the lateral load rollers safely and precisely for guidance.
  • FIG. 1 is a schematic side view of mechanism to carry out the process of this invention with particular emphasis on the feeding of the sheet.
  • FIG. 2 shows a schematic top view of the mechanism of FIG. 1.
  • FIG. 3 is a diagram of the course of movement for the sheet feed timing relative to the stroke of the cutting unit.
  • FIG. 4 is a diagram of the course of movement of the lateral load in relation to the stroke of the cutting unit.
  • FIGS. 1 and 2 A designates the sheet portion of a coil, whose free end B has a scroll cut.
  • the direction of movement of sheet A has been designated by arrow 1.
  • the coarse feed mechanism generally designated by the reference numeral 3, and of a pair of conveying rollers 4 extending transversely to the direction of arrow 1 of the sheet A and lateral load rollers 5 lying on both sides of sheet A. While the distance of the conveying rollers 4 from cutter 2 has not been fixed exactly, but should lie as much as possible not too far away from said cutter, the position of the lateral load rollers 5 is definite. They are centered one cutting length in front of the tool of the cutter 2.
  • the rollers 4 themselves, in order to achieve the optimum conveying characteristics, are provided effectively on their surface with at least a rubber coating, or else they consist entirely of rubber or some equivalent material.
  • the driving and axial hunting of the lower roller 4 is accomplished in a conventional manner not shown such as via an oscillating drive and an arrangement transforming the feed and reverse movement of the pendulum drive into a rotational movement and transferring it to the pair of rollers 4.
  • the lateral load rollers 5 of the coarse feed 3, as shown in FIG. 2, are connected with pistons 8 guided pneumatically or some other way in the cylinders 7. While the left-hand rollers 5 positively engage the edge of the sheet, between the righthand rollers 5 and the piston 7 a spring 9 has been interposed, which permits a movability of the sheet A transversely to its feed direction 1. This movability will be encouraged further through the fact that the conveying rollers 4 are shiftable in an axial direction, as indicated by arrow 10.
  • a fine feed mechanism which consists of the pair of conveying rollers 11 and lateral load rollers 12 which rollers 12 are arranged in the area of the cutter 2 or directly in front of it.
  • the conveying rollers 11, which also are shiftable axially in the direction of arrow 10 have been arranged in the immediate vicinity of the centering stops 13 on the sides of the front edges in front of the end B of the sheet A.
  • the lateral load rollers 12 of the fine feed mechanism that pair of rollers 12 which lies to the left of the sheet A is fixed and that pair of rollers 12 which represents the right-hand guidance of the sheet A has been mounted for movement transversely of the sheet A.
  • a spring 14 has been interposed between a fixed support and the right-hand rollers 12.
  • the fine feed rollers 11 may be driven and axially hunted in any conventional manner including by way of a radial curve and applied by a pressure spring (not shown).
  • the end B of the sheet A is moved up to about 25 mm in front of the centering stop 13 on the front edge side by the conveying rollers 4 of the coarse feed mechanism.
  • a pre-alignment will be achieved by means of the axial movability of the conveying rollers 4 with a simultaneous assistance of the loose right-hand lateral load rollers 5, 12 for the sheet A, by subjecting the end portion of the sheet A to a hunting movement transversely to the feed direction 1 through the lower conveying roller 4.
  • the hunting of the conveying rollers 4 is stopped the lower roller 4 is moved away from the sheet A in the direction of arrow 6 through the use of conventional mechanism (not shown).
  • all of the lateral load rollers 5 of the coarse feed mechanism 3 are retracted through action of the pistons 7 by means of pressure within the respective cylinder.
  • the end of the sheet is now thus influenced only by the conveying rollers 11 and the lateral load rollers 12 of the fine feed mechanism.
  • the fine feed is accomplished in a conventional manner at a lower speed than the coarse feed and the free end B of sheet A is guided by said feed at a slow rate of movement toward the centering stops 13 on the front edge side.
  • a renewed hunting of the end of sheet A again takes place through the axially shiftable conveying rollers 11 and a simultaneous lateral alignment of the sheet through the lateral load rollers 12, the left end one of which is fixed and the right hand one is loose.
  • the centering stop 13 On the one hand, and the lateral load rollers 12, on the other hand, the optimum positioning precision will be achieved in the case of this final stage of the feed, which now will permit the cutting of the cutter 2 without any hesitation.
  • the centering stops 13 are folded away downwards in the direction of the arrow in a conventional manner, the cut plate is carried away and the feed and centering process is repeated again by first of all the coarse feed starting up again in the previously described manner.
  • FIG. 3 and 4 the course of the individual operating phases is shown in relation to the cutter stroke a in the manner of a diagram.
  • the cutter stroke a has been subdivided into 360 in order to make the course of the movement more clear, although this is not to be interpreted that, in the case of the cutter 2, we are supposed to deal with a circular movement of the knife.
  • the subdivision into 360 is merely to clarify the phase starting out from an initial position of the knife via the cutting process back into the starting position. It is clear that the actual cut takes place at about 180.
  • FIG. 4 f designates the lateral guidance of the sheet by the coarse feed, and g the stop, in dependence on the cutter stroke a.
  • the diagrams are self-explanatory so that no detailed explanations are required.
  • a process for the feeding and simultaneous transversely centering of sheet material in a scroll cutting operation utilizing a fixed centering step to effect the precision cutting of scroll cut sheets for the further processing of the sheets into stamped parts comprising the steps of advancing the sheet material in a coarse feeding operation relative to a cutter to a position wherein a leading edge of the sheet material is closely in front of the centering stop while simultaneously hunting the sheet material transversely of the direction of feed and applying a lateral guidance load to opposite side edges of the sheet material, discontinuing the coarse feeding operation and the associated guidance and hunting action on the sheet material, and then further advancing the sheet material in a fine feeding operation into engagement with the centering stop while simultaneously further hunting the sheet material transversely of the direction of feed and applying a second lateral guidance load to the opposite edges of the sheet material.
  • edge guidance of the sheet material along one edge is positive and along the opposite edge the edge guidance is loosely resilient.
  • a combined feed and guide assembly comprising coarse feed means for simultaneously feeding sheet material past said cutter to a position wherein a leading edge of the sheet material is positioned closely adjacent said centering stop and hunting the sheet material transversely of the direction of sheet material feed, first guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material aiding in the centering thereof relative to said scroll cutter, and fine feed means operable independently of said coarse feed means for simultaneously further feeding the leading edge of the sheet material into engagement with the centering stop and hunting the sheet material transversely of the direction of sheet material feed, and second guide means for engaging opposite edges of the sheet material and in cooperation with the hunting of the sheet material by said fine feed means and the centering stop assuring centering of the sheet material relative to said scroll cutter.
  • each of said feed means includes a pair of feed rollers engageable with the opposite surfaces of sheet material, said feed rollers being axially movable to effect said sheet material hunting.
  • each of said guide means includes lateral guide rollers, means fixedly mounting guide rollers along one edge of the sheet material, and other means resiliently mounting guide rollers along the other edge of the sheet material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Structure Of Belt Conveyors (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Details Of Cutting Devices (AREA)
US3668959D 1969-08-12 1970-08-12 Process and device for advancing and simultaneously centering sheet material Expired - Lifetime US3668959A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1940912A DE1940912C3 (de) 1969-08-12 1969-08-12 Vorrichtung zum Ausrichten von schrittweise einer Schere mit Scrollschnitt zugeführtem Bandmaterial

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US3668959A true US3668959A (en) 1972-06-13

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US3668959D Expired - Lifetime US3668959A (en) 1969-08-12 1970-08-12 Process and device for advancing and simultaneously centering sheet material

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813976A (en) * 1973-06-20 1974-06-04 Guardian Industries Photographic print cutter
FR2343527A1 (fr) * 1976-03-10 1977-10-07 Aylesworth Albert Dispositif destine a l'alignement du materiau alimentant une presse mecanique
US4708043A (en) * 1985-08-07 1987-11-24 The Cly-Del Manufacturing Company Adjustable cam indexing feed apparatus
US5604044A (en) * 1992-12-28 1997-02-18 Mccabe; Charles J. Blanks for sheet material forming process
US6427512B2 (en) * 2000-02-21 2002-08-06 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for blanking elements of belt for continuously variable transmission
US20040168556A1 (en) * 2001-10-10 2004-09-02 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of trimming strip, especially hot roll metal strip
CN101672301B (zh) * 2009-09-28 2011-02-09 浙江朗迪集团股份有限公司 一种金属盘管风机装配机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446499A (en) * 1968-01-05 1969-05-27 Bliss Co Sheet material handling apparatus
US3599521A (en) * 1969-06-25 1971-08-17 Alves Photo Service Inc Automatic film cutter
US3600992A (en) * 1968-12-09 1971-08-24 Heuze Malevez & Simon Reunis S Device for the scoring of a glass sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446499A (en) * 1968-01-05 1969-05-27 Bliss Co Sheet material handling apparatus
US3600992A (en) * 1968-12-09 1971-08-24 Heuze Malevez & Simon Reunis S Device for the scoring of a glass sheet
US3599521A (en) * 1969-06-25 1971-08-17 Alves Photo Service Inc Automatic film cutter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813976A (en) * 1973-06-20 1974-06-04 Guardian Industries Photographic print cutter
FR2343527A1 (fr) * 1976-03-10 1977-10-07 Aylesworth Albert Dispositif destine a l'alignement du materiau alimentant une presse mecanique
US4708043A (en) * 1985-08-07 1987-11-24 The Cly-Del Manufacturing Company Adjustable cam indexing feed apparatus
US5604044A (en) * 1992-12-28 1997-02-18 Mccabe; Charles J. Blanks for sheet material forming process
US6427512B2 (en) * 2000-02-21 2002-08-06 Honda Giken Kogyo Kabushiki Kaisha Method of and apparatus for blanking elements of belt for continuously variable transmission
US20040168556A1 (en) * 2001-10-10 2004-09-02 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of trimming strip, especially hot roll metal strip
US7908948B2 (en) * 2001-10-10 2011-03-22 Bwg Bergwerk-Und Walzwerk-Maschinenbau Gmbh Method of trimming strip, especially hot roll metal strip
CN101672301B (zh) * 2009-09-28 2011-02-09 浙江朗迪集团股份有限公司 一种金属盘管风机装配机

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Publication number Publication date
DE1940912A1 (de) 1971-02-25
DE1940912B2 (de) 1978-04-13
DE1940912C3 (de) 1978-12-21

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