EP0104311B1 - Verfahren zur Formänderung eines plattenförmigen Werkstücks - Google Patents

Verfahren zur Formänderung eines plattenförmigen Werkstücks Download PDF

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Publication number
EP0104311B1
EP0104311B1 EP83104509A EP83104509A EP0104311B1 EP 0104311 B1 EP0104311 B1 EP 0104311B1 EP 83104509 A EP83104509 A EP 83104509A EP 83104509 A EP83104509 A EP 83104509A EP 0104311 B1 EP0104311 B1 EP 0104311B1
Authority
EP
European Patent Office
Prior art keywords
percussion
workpiece
ram
punch
guide
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
Application number
EP83104509A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0104311A1 (de
Inventor
Siegfried Walter
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm 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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of EP0104311A1 publication Critical patent/EP0104311A1/de
Application granted granted Critical
Publication of EP0104311B1 publication Critical patent/EP0104311B1/de
Expired 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/06—Deforming sheet metal, tubes or profiles by sequential impacts, e.g. hammering, beating, peen forming
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • Y10T29/49812—Temporary protective coating, impregnation, or cast layer
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49906—Metal deforming with nonmetallic bonding

Definitions

  • the invention relates to a method for changing the shape of a plate-shaped workpiece of the type specified in the preamble of claim 1, DE-A-2 843 888 starting from the generic specification of the document.
  • the deformation effect of the impactor or impactors must be changed in a cumbersome manner in these methods on the corresponding surface areas of the workpiece, be it by changing the movement impulse imparted to them or the impact density, i.e. the feed rate, which requires a structurally complex impact body control and makes the practical implementation of these methods very difficult or even questions.
  • the object of the invention is to design the method of the type mentioned in such a way that an impact body deformation effect which changes over the machining surface is achieved in a simple manner, so that workpieces with a non-uniform wall thickness and / or curvature profile can be achieved with little effort and high accuracy can be shaped.
  • the deformation impact of the impact body acting on the workpiece surface is variably controlled in a predetermined manner in that, depending on the required deformation effect, an insulating layer which has a locally varying impact reducing effect is arranged between the impact stamp and the workpiece surface, the elasticity and damping characteristics of which depend on the existing wall thickness.
  • the desired curvature of the workpiece is designed to change and which transmits a precisely metered part of the movement impulse of the impact body as a local deformation shock to the workpiece surface, which guarantees precise compliance with a deformation of the edge zone that is variable over the machining surface of the workpiece, so that it is performed with the method according to the invention It is now possible for the first time to form even more complicated workpieces cost-effectively with high accuracy without additional, complex control units using the impact body method.
  • the insulating layer is preferably an elastomer layer with a smaller layer thickness at the points and / or curvature of the workpiece, which can be achieved in a simple manner by means of an elastomer lacquer which is applied to the workpiece surface as a correspondingly graduated multiple coating.
  • the insulating layer is preferably an elastomer layer with a smaller layer thickness at the points and / or curvature of the workpiece, which can be achieved in a simple manner by means of an elastomer lacquer which is applied to the workpiece surface as a correspondingly graduated multiple coating.
  • the stamp guide is expediently supported on the insulating layer in a rolling manner, as a result of which the stamp feed jamming of the stamp guide on the workpiece surface and especially the insulation layer, in particular at the points of increasing insulation layer thickness, is prevented and a very smooth, quiet stamp feed can be achieved.
  • the punch is preferably pressed resiliently into a position raised from the workpiece or insulation layer surface, so that it only comes into contact with the workpiece or the insulation layer for a short time for the duration of the deformation shock against the spring force and thus - unlike a constant sliding support of the punch - the risk of jamming. of the punch or damage to the insulation layer is largely prevented.
  • the movement impulse given to the punch does not have to be changed during processing, but it is preferably preset to the maximum value required at the points with the greatest deformation effect, so that these points of greatest wall thickness or greatest curvature of the workpiece can remain uncoated and that Insulation layer must only be dimensioned according to the required fluctuation range of the deformation impacts.
  • This preselection of the movement impulse given to the punch by a percussion piston takes place according to An Say 5 preferably in that the punch guide from the guide cylinder of the percussion piston has a variable distance, which is preselected, the greater the maximum required deformation effect of the punch, which is compared to the usual working pressure or stroke setting of the percussion piston for preselecting the movement pulse brings a further significant simplification.
  • the workpiece 2 to be deformed is an initially flat sheet metal plate, which is machined on the upper side by an elongated punch 4 which repetitively acts like a hammer, which is moved back and forth across the workpiece surface at a uniform feed rate transversely to the desired direction of deformation of the sheet metal plate 2, the sheet metal plate 2 after each pass of the punch 4 is advanced transversely to its direction of advance by one movement step, so that the line-shaped stroke track indicated in dashed lines is formed in FIG.
  • the impact shock density in the direction of movement of the punch 4 at constant stroke frequency by the selected feed speed of the punch 4 and whose line spacing is brought to a variably adjustable value which remains constant during processing, however, due to the size of the movement step of the workpiece 2 which runs transversely to the punch advance direction.
  • the movement impulse given to the punch 4 for each impact impact also remains at a preselected constant value during the machining process.
  • the sheet metal plate 2 to be deformed has a changing wall thickness and is deformed with different curvatures, as shown in FIG. 1 by the workpiece surface segment A of increased wall thickness and by the surface segment B, for which a smaller radius of curvature R 1 than for the remaining surface of the Workpiece 2 (radius of curvature R 2 ) is provided is shown.
  • the necessary local deformation effect i.e. the local stretching of the upper edge zones of the workpiece 2 caused by the impact of the punch 4 is in the overlap area of the two surface segments A and B, i.e.
  • the workpiece 2 before machining has a different strength with one in the various surface segments in accordance with the local deformation effect required in each case Shock-absorbing insulation layer 6 is covered, for example with an elastomer lacquer layer, the layer thickness of which decreases in the manner shown opposite to the required local deformation effect, the surface regions to be bent the most with the greatest wall thickness, i.e. the surface region C of the workpiece 2, remaining uncoated.
  • the insulation layer 6 can be achieved most simply by means of multiple painting, in which, before the individual painting processes, masking masks of the appropriate cut are applied to the surface areas of the workpiece 2 or the insulation layer 6 that are no longer to be coated.
  • the insulation layer 6 can also be constructed from appropriately graded, multi-layered individual foils, so that it can be removed from the workpiece surface after processing and used again for further workpieces.
  • the impact of the punch 4 is damped and cushioned to a greater or lesser extent, so that the size of the deformation impact acting on the workpiece surface is variably controlled with the aid of the insulating layer 6 during processing in a predetermined manner.
  • the wall thickness and the thickness ratios of the insulation layer 6, like the radii of curvature of the workpiece 2, are shown in the figures in a greatly exaggerated manner for the sake of clarity.
  • the workpiece 2 is fully lined with a resilient material that compensates for the wall thickness differences, for example hard foam panels 8, and brought to rest on a tubular support body 10 during processing below the feed path of the punch 4.
  • a resilient material that compensates for the wall thickness differences, for example hard foam panels 8, and brought to rest on a tubular support body 10 during processing below the feed path of the punch 4.
  • the processing machine shown in FIGS. 2 and 3 contains, in addition to the punch 4, the main components of a tool slide 12, which guides 14 in front thrust direction of the punch 4 is driven back and forth, a percussion cylinder 20 mounted vertically displaceably on guide pins 16 and elastomer springs 18 on the tool slide 12, including a compressed air supply 22 and a percussion piston 24 periodically actuated in the manner of a riveting hammer, and one provided with rollers 26 Guide shoe 28, via which the percussion piston-cylinder unit 20, 24 is supported on the workpiece surface or the insulation layer 6. In a slot-shaped recess 30 of the guide shoe 28, the punch 4 is guided such that it can be displaced in a vertically displaceable manner.
  • a return spring 36 sits between an annular collar 34 of the punch 4 and the guide shoe 28 and presses the punch 4 into the return stroke position shown, which is lifted from the workpiece surface or the insulating layer 6.
  • the processing machine shown offers a simple possibility of a variable preselection of the movement impulse given to the punch 4 by the striking piston 24, in order to be able to process different types of workpieces, which require different sized maximum values of the deformation impacts, i.e. different deformation effects on the uncoated surface segments.
  • a height-adjustable elongated screw connection 38 is provided between the cylinder 20 and the guide shoe 28, by means of which the distance between the impact cylinder 20 and the guide shoe 28 can be variably adjusted before machining. If this distance is preselected larger, the free-flight distance of the percussion piston 24 increases between its full return stroke position and the impact on the percussion piston 4 and, accordingly, the movement impulse imparted to the percussion piston 24 with each work cycle. Conversely, the movement impulse with which the punch 4 runs against the workpiece surface or the insulating layer 6 decreases when a smaller distance between the striking cylinder 20 and the guide shoe 28 is preselected.
  • the described method is used to bring a large-area component, which is stepped on the underside many times and has large relative changes in wall thickness, into a simply curved contour. After removing the insulation layer 6 on the upper side of the workpiece, it is clearly visible, but if desired easily grindable processing track remains.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Forging (AREA)
  • Vibration Dampers (AREA)
EP83104509A 1982-08-26 1983-05-07 Verfahren zur Formänderung eines plattenförmigen Werkstücks Expired EP0104311B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823231673 DE3231673A1 (de) 1982-08-26 1982-08-26 Verfahren zur formaenderung eines plattenfoermigen werkstuecks
DE3231673 1982-08-26

Publications (2)

Publication Number Publication Date
EP0104311A1 EP0104311A1 (de) 1984-04-04
EP0104311B1 true EP0104311B1 (de) 1986-03-05

Family

ID=6171684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104509A Expired EP0104311B1 (de) 1982-08-26 1983-05-07 Verfahren zur Formänderung eines plattenförmigen Werkstücks

Country Status (4)

Country Link
US (1) US4489580A (enrdf_load_stackoverflow)
EP (1) EP0104311B1 (enrdf_load_stackoverflow)
JP (1) JPS5964120A (enrdf_load_stackoverflow)
DE (1) DE3231673A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005567A1 (de) * 1990-02-22 1991-08-29 Friedrich Engels Verfahren zum profilieren von plattenfoermigen blechen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10359303A1 (de) * 2003-12-17 2005-07-21 Roche Diagnostics Gmbh Kunststoff-Spritzgussteil mit eingebettetem Bauteil
JP7182847B2 (ja) * 2016-09-29 2022-12-05 三菱重工業株式会社 成形方法および成形装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1582571A (en) * 1921-10-29 1926-04-27 Budd Wheel Co Process of straightening tapered disks
US2289311A (en) * 1940-03-06 1942-07-07 Sk Wellman Co Composite blank and method of shaping
US2960763A (en) * 1955-10-11 1960-11-22 Reymond M Reichl Method of forging with thin webs
US2960764A (en) * 1959-04-08 1960-11-22 Reymond M Reichl Method of making metal shapes having thin webs
US3524243A (en) * 1968-01-10 1970-08-18 Meredith Corp Method for curving printing plates
DE2063100A1 (en) * 1970-12-14 1972-06-29 Avco Corp., Cincinnati, Ohio (V.St.A.) Forming metal sheets by peening - using large diameter free-falling hardened steel balls at low velocity
CH625433A5 (enrdf_load_stackoverflow) * 1977-10-11 1981-09-30 Marcel Wahli
DE3111148A1 (de) * 1981-03-21 1982-10-07 Klaus-Peter Dipl.-Ing. 5100 Aachen Hornauer Verfahren und vorrichtung zur formaenderung bei blechen und tafeln

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005567A1 (de) * 1990-02-22 1991-08-29 Friedrich Engels Verfahren zum profilieren von plattenfoermigen blechen

Also Published As

Publication number Publication date
DE3231673C2 (enrdf_load_stackoverflow) 1988-11-03
JPH0362487B2 (enrdf_load_stackoverflow) 1991-09-26
US4489580A (en) 1984-12-25
DE3231673A1 (de) 1984-03-01
JPS5964120A (ja) 1984-04-12
EP0104311A1 (de) 1984-04-04

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