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EP0049744B1 - Method of forming similar deep drawn metal sheets - Google Patents

Method of forming similar deep drawn metal sheets Download PDF

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Publication number
EP0049744B1
EP0049744B1 EP81106157A EP81106157A EP0049744B1 EP 0049744 B1 EP0049744 B1 EP 0049744B1 EP 81106157 A EP81106157 A EP 81106157A EP 81106157 A EP81106157 A EP 81106157A EP 0049744 B1 EP0049744 B1 EP 0049744B1
Authority
EP
European Patent Office
Prior art keywords
sheet
double
tool
walled
shaped
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
EP81106157A
Other languages
German (de)
French (fr)
Other versions
EP0049744A3 (en
EP0049744A2 (en
Inventor
Rolf Dipl.-Ing. Eckert
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT81106157T priority Critical patent/ATE5857T1/en
Publication of EP0049744A2 publication Critical patent/EP0049744A2/en
Publication of EP0049744A3 publication Critical patent/EP0049744A3/en
Application granted granted Critical
Publication of EP0049744B1 publication Critical patent/EP0049744B1/en
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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/64—Processes of using preform in molding
    • 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
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49387—Boiler making
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49879—Spaced wall tube or receptacle
    • 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
    • Y10T29/49893—Peripheral joining of opposed mirror image parts to form a hollow body
    • 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
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49988—Metal casting

Definitions

  • the invention relates to a method for producing similar deep-drawn parts according to the first part of claim 1. Such a method is known.
  • thermoformed sheets for double-walled components are formed either in two similar independent tools or in a single tool using an interposed molding sheet.
  • first case there are double tool and operating costs, and different wear on the tools results in an uneven spacing from the wall.
  • second case especially in the case of a very thin intermediate space and a correspondingly thin shaped sheet, this is subject to an impermissibly high consumption rate due to constant elastic deformation and constant surface wear.
  • the production of the shaped sheet also requires another tool.
  • the object is achieved by the features specified in the characterizing part of claim 1.
  • the inner sheet is hereby brought into its final shape in two working stages in a material-saving manner.
  • the later inner sheet is hereby brought into its final shape in two working stages in a material-saving manner.
  • the similar deep-drawn sheets produced by the method according to the invention are connected to double-walled components on their wheels by spot welding or seam welding, depending on requirements, it being possible for an edge sheet strip to be inserted between the inner and outer sheets. If this connection only takes place on two opposite, not interconnected lines, the double-walled component can be flowed through by a medium for cooling or heating purposes. Inlet and outlet openings can be created by appropriate design of the edges of the sheets or by their size in relation to the tool. By forming a fillet on the tool at the edge of the molded part, a flange at the edge of the inner part can be produced which abuts the edge of the outer sheet at an angle, which means that the conditions for edge welding are met without reworking.
  • two double-walled half-shells can be connected to form a hollow body, which in turn can be flowed through by another medium.
  • Such parts can be produced in two steps, but particularly cheaply by jointly welding the edges of two inner and two outer parts in a single operation.
  • Pipe elbows produced in this way are particularly advantageously cast as insulating or coolable gas channels in cylinder heads.
  • 1 denotes an inner sheet and 2 an outer sheet of a double-walled component, which are connected to one another in an edge weld 3.
  • two such double-walled parts of the same cross-section are connected in the form of half-shells 13 along their edge welds 3 to form a double-walled tube piece 14.
  • the inner sheets 1 each have a flange 12 that forms an angle on the edge weld 3 with the edge of the outer sheets 2.
  • the punch 5 and the lower part 6 of the tool is indicated in the starting position with material loading.
  • An outer plate 2 and a filler plate 1a rest on the lower part 6, which in turn carries a preformed inner plate 1 which is put over the stamp 5.
  • This preformed inner sheet 1 has served as filler sheet 1a in a previous deep-drawing process and, like the overlying outer sheet 2, is finished in the upcoming deep-drawing process.
  • the placed filler sheet 1a will play the role of the preformed inner sheet 1 in the subsequent deep-drawing process.
  • the punch 5 and the lower part 6 of the tool have roundings 11 on the edge of the molded part to produce a flange 12 on the inner sheet 1.
  • FIG. 3 the view on the left shows a pipe elbow 14 which is composed of two inner and two outer sheets 1, 2 or two half-shells 13 and which is provided with a base plate 8.
  • the illustration on the right shows the same pipe elbow 14 in a section indicated on the left, but cast in a metal casting 10.
  • an inserted valve seat ring is designated by 9.
  • the outer shell 2 is perforated at a point 7 and joined to the inner shell 1 at the edges, in order to create a possibility of using a valve guide.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

A method of producing similar deep-drawn parts for double-walled structural parts having uniformly spaced walls and edge welding. During every deep-drawing procedure, a respective planar outer plate, which is placed upon the lower part of the tool, as is a filler plate, as well as a preformed or preshaped inner plate, which is placed over the tool punch, are shaped in common, whereby the preformed inner plate and the outer plate receive their final form or shape, and the filler plate is deformed into a preshaped inner plate for a subsequent deep-drawing procedure. The tool for carrying out this method is characterized in that the smallest spacing between the tool punch and the lower part of the tool corresponds to the entire thickness of the two inner plates and one outer plate.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von ähnlichen Tiefziehteilen gemäß dem ersten Teil des Anspruchs 1. Ein solches Verfahren ist bekannt.The invention relates to a method for producing similar deep-drawn parts according to the first part of claim 1. Such a method is known.

Ähnliche Tiefziehbleche für doppelwandige Bauteile werden entweder in zwei ähnlichen unabhängigen Werkzeugen oder in einem einzigen Werkzeug unter Verwendung eines jeweils zwischengelegten Formbleches geformt. Im ersten Fall entstehen doppelte Werkzeug- und Betriebskosten, und durch unterschiedlichen Verschleiß an den Werkzeugen kommt ein ungleichmäßiger Wandabstand zustande. Im zweiten Fall ist insbesondere bei sehr dünnem Zwischenraum und entsprechend dünnem Formblech dieses durch ständige elastische Verformung und ständigem Oberflächenverschleiß einer unzulässig hohen Verbrauchsrate unterworfen. Die Herstellung des Formbleches erfordert ebenfalls ein weiteres Werkzeug.Similar thermoformed sheets for double-walled components are formed either in two similar independent tools or in a single tool using an interposed molding sheet. In the first case, there are double tool and operating costs, and different wear on the tools results in an uneven spacing from the wall. In the second case, especially in the case of a very thin intermediate space and a correspondingly thin shaped sheet, this is subject to an impermissibly high consumption rate due to constant elastic deformation and constant surface wear. The production of the shaped sheet also requires another tool.

Es liegt der Erfindung die Aufgabe zugrunde, ähnliche Tiefziehbleche in einem einzigen Werkzeug unter Vermeidung eines intensivem Verschleiß ausgesetzten Zwischenblechs vorzuschlagen. Die Aufgabe wird durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale gelöst.It is the object of the invention to propose similar deep-drawing sheets in a single tool while avoiding an intermediate sheet exposed to intensive wear. The object is achieved by the features specified in the characterizing part of claim 1.

Nach dem erfindungsgemäßen Verfahren wird hierdurch in materialschonender Weise das Innenblech in zwei Arbeitsstufen in seine Endform gebracht. Durch Verwendung des späteren Innenbleches als Zwischenform wird erfindungsgemäß ein gleichmäßig starker Zwischenraum geschaffen.According to the method according to the invention, the inner sheet is hereby brought into its final shape in two working stages in a material-saving manner. By using the later inner sheet as an intermediate shape, a uniformly strong intermediate space is created according to the invention.

Die nach dem erfindungsgemäßen Verfahren hergestellten ähnlichen Tiefziehbleche werden je nach Erfordernissen durch Punktschweißen oder Nahtschweißen an ihren Rädern zu doppelwandigen Bauteilen verbunden, wobei ggfs. ein Randblechstreifen zwischen Innen- und Außenblech eingelegt werden kann. Findet diese Verbindung nur an zwei gegenüberliegenden, nicht miteinander verbundenen Linien statt, so kann das doppelwandige Bauteil zu Kühl- oder Aufwärmzwecken von einem Medium durchströmt werden. Eintritts- und Austrittsöffnungen können dabei durch entsprechende Gestaltung der Ränder der Bleche bzw. durch ihre Größe im Verhältnis zum Werkzeug erzeugt werden. Durch Ausbildung einer Ausrundung am Werkzeug am Rande des Formteils kann eine Bördelung am Rande des Innenteils erzeugt werden, die im Winkel an den Rand des Außenbleches stößt, womit ohne Nacharbeit die Voraussetzungen für eine Randverschweißung gegeben sind.The similar deep-drawn sheets produced by the method according to the invention are connected to double-walled components on their wheels by spot welding or seam welding, depending on requirements, it being possible for an edge sheet strip to be inserted between the inner and outer sheets. If this connection only takes place on two opposite, not interconnected lines, the double-walled component can be flowed through by a medium for cooling or heating purposes. Inlet and outlet openings can be created by appropriate design of the edges of the sheets or by their size in relation to the tool. By forming a fillet on the tool at the edge of the molded part, a flange at the edge of the inner part can be produced which abuts the edge of the outer sheet at an angle, which means that the conditions for edge welding are met without reworking.

In besonderer erfindungsgemäßer Anwendung können zwei doppelwandige Halbschalen zu einem Hohlkörper verbunden werden, der selber wiederum von einem weiteren Medium durchströmt sein kann. Die Herstellung solcher Teile kann in zwei Schritten erfolgen, besonders günstig jedoch durch eine gemeinsame Randverschweißung von zwei Innen- und zwei Außenteilen in einem einzigen Arbeitsgang. Besonders vorteilhaft sind derartig hergestellte Rohrkrümmer als isolierende oder kühlbare Gaskanäle in Zylinderköpfe einzugießen.In a particular application according to the invention, two double-walled half-shells can be connected to form a hollow body, which in turn can be flowed through by another medium. Such parts can be produced in two steps, but particularly cheaply by jointly welding the edges of two inner and two outer parts in a single operation. Pipe elbows produced in this way are particularly advantageously cast as insulating or coolable gas channels in cylinder heads.

Die Abbildungen zeigen nach dem erfindungsgemäßen Verfahren hergestellte Bauteile sowie eine Situation des Herstellungsverfahrens.

  • In Figur 1 ist ein nach dem Verfahren hergestelltes Bauteil in Form eines doppelwandigen Hohlkörpers im Schnitt dargestellt.
  • In Figur 2 ist das Werkzeug mit aufgelegten Blechen in der Ausgangssituation vor dem Tiefziehen gezeigt und
  • Figur 3 zeigt in einer Ansicht und einem Schnitt ein nach dem Verfahren hergestelltes Bauteil in Form eines in einem Metallgußteil vergossenen doppelwandigen Rohrkrümmers.
The figures show components manufactured by the method according to the invention and a situation of the manufacturing method.
  • In Figure 1, a component produced by the method in the form of a double-walled hollow body is shown in section.
  • In Figure 2, the tool is shown with sheet metal in the initial situation before deep drawing and
  • FIG. 3 shows a view and a section of a component produced by the method in the form of a double-walled pipe bend cast in a metal casting.

In den Figuren ist jeweils mit 1 ein Innenblech und mit 2 ein Außenblech eines doppelwandigen Bauteiles dargestellt, die in einer Randverschweißung 3 miteinander verbunden sind. In Fig. 1 sind zwei derartige doppelwandige, im Querschnitt gleichartige Teile in Form von Halbschalen 13 längs ihrer Randverschweißungen 3 zu einem doppelwandigen Rohrstück 14 verbunden. Sie bilden dadurch zwei voneinander getrennte Zwischenräume 4. Die Innenbleche 1 weisen jeweils eine Bördelung 12 auf, die jeweils an der Randverschweißung 3 einen Winkel mit dem Rand der Außenbleche 2 bildet.In the figures, 1 denotes an inner sheet and 2 an outer sheet of a double-walled component, which are connected to one another in an edge weld 3. In Fig. 1, two such double-walled parts of the same cross-section are connected in the form of half-shells 13 along their edge welds 3 to form a double-walled tube piece 14. As a result, they form two interspaces 4 that are separate from one another. The inner sheets 1 each have a flange 12 that forms an angle on the edge weld 3 with the edge of the outer sheets 2.

In Figur 2 ist andeutungsweise der Stempel 5 und das Unterteil 6 des Werkzeuges in der Ausgangsstellung mit Materialbeschickung dargestellt. Auf dem Unterteil 6 liegen ein Außenblech 2 und ein Füllblech 1a auf, das wiederum ein vorgeformtes, über den Stempel 5 gestülptes Innenblech 1 trägt. Dieses vorgeformte Innenblech 1 hat in einem vorhergegangenen Tiefziehvorgang als Füllblech 1a gedient und wird in dem bevorstehenden Tiefziehvorgang ebenso wie das aufliegende Außenblech 2 fertig geformt. Das aufgelegte Füllblech 1a wird in dem dann nachfolgenden Tiefziehvorgang die Rolle des vorgeformten Innenbleches 1 spielen. Stempel 5 und Unterteil 6 des Werkzeugs weisen Abrundungen 11 am Rande des Formteils zur Erzeugung einer Bördelung 12 am Innenblech 1 auf.In Figure 2, the punch 5 and the lower part 6 of the tool is indicated in the starting position with material loading. An outer plate 2 and a filler plate 1a rest on the lower part 6, which in turn carries a preformed inner plate 1 which is put over the stamp 5. This preformed inner sheet 1 has served as filler sheet 1a in a previous deep-drawing process and, like the overlying outer sheet 2, is finished in the upcoming deep-drawing process. The placed filler sheet 1a will play the role of the preformed inner sheet 1 in the subsequent deep-drawing process. The punch 5 and the lower part 6 of the tool have roundings 11 on the edge of the molded part to produce a flange 12 on the inner sheet 1.

In Figur 3 ist in der linken Darstellung ein aus zwei Innen- und zwei Außenblechen 1, 2 bzw. aus zwei Halbschalen 13 zusammengefügter Rohrkrümmer 14, der mit einer Bodenplatte 8 versehen ist, in der Ansicht dargestellt. Die rechte Darstellung zeigt den gleichen Rohrkrümmer 14 in einem links angedeuteten Schnitt, jedoch eingegossen in einem Metallgußteil 10. Hierbei ist mit 9 ein eingesetzter Ventilsitzring bezeichnet. In besonderer Nacharbeit am Rohrkrümmer ist an einer Stelle 7 die Außenschale 2 durchbrochen und an den Rändern mit der Innenschale 1 zusammengefügt, um so eine Möglichkeit zum Einsatz einer Ventilführung zu schaffen.In FIG. 3, the view on the left shows a pipe elbow 14 which is composed of two inner and two outer sheets 1, 2 or two half-shells 13 and which is provided with a base plate 8. The illustration on the right shows the same pipe elbow 14 in a section indicated on the left, but cast in a metal casting 10. Here, an inserted valve seat ring is designated by 9. In particular reworking on the pipe elbow, the outer shell 2 is perforated at a point 7 and joined to the inner shell 1 at the edges, in order to create a possibility of using a valve guide.

Claims (5)

1. A method of manufacturing a double-walled component of similar deep-drawn component parts, in which the two walls of the component are spaced at an even distance from yet welded at their edges to each other and in which for each drawing operation an outer sheet (2), a spacing sheet (1a) and an inner sheet (1) are put into a drawing tool and are shaped jointly, characterized in that during each drawing operation one each, flat, outer sheet (2) and a spacing sheet (1a), both of which are placed on the lower die (6) of the tool, and the, pre-shaped, inner sheet (1), which is placed over the upper die (5) are shaped jointly, and in that the pre-shaped inner sheet (1) and the outer sheet (2) are finish-shaped while the spacing sheet (1a) is formed into the pre-shaped inner sheet (1) to be used during a subsequent drawing operation.
2. A method according to claim 1, characterized in that the upper die (5) and the lower die (6) are each provided with a chamfer (11) serving to form a flange (12) at the edge of the inner sheet.
3. A double-walled component manufactured by a method according to claim 1 or claim 2, characterized in that the edge weld (3) is located at the angle formed between the edges of the outer sheet (2) and the flange (12) of the inner sheet.
4. A double-walled component manufactured by a method according to claim 1 or claim 2, characterized in that two inner sheets (1) and two outer sheets (2) are joined by the edge weld (3), which is common to the two sets of sheets and extends along the lines of their edges, to constitute a double-walled tube (14).
5. A double-walled component manufactured by a method according to claim 1 or according to any of the claims 2, 3 or 4, characterized in that a double-walled half-tube (13) or the double-walled tube (14) is combined with a metal casting (10), particularly a cylinder head, while the latter is being cast to form an insulating or coolable hollow space.
EP81106157A 1980-10-10 1981-08-06 Method of forming similar deep drawn metal sheets Expired EP0049744B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81106157T ATE5857T1 (en) 1980-10-10 1981-08-06 METHOD OF PRODUCTION OF SIMILAR DEEP-DRAWING SHEET METAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803038276 DE3038276A1 (en) 1980-10-10 1980-10-10 METHOD FOR PRODUCING SIMILAR DEEP DRAWING SHEETS
DE3038276 1980-10-10

Publications (3)

Publication Number Publication Date
EP0049744A2 EP0049744A2 (en) 1982-04-21
EP0049744A3 EP0049744A3 (en) 1982-09-15
EP0049744B1 true EP0049744B1 (en) 1984-01-18

Family

ID=6114065

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106157A Expired EP0049744B1 (en) 1980-10-10 1981-08-06 Method of forming similar deep drawn metal sheets

Country Status (4)

Country Link
US (1) US4440337A (en)
EP (1) EP0049744B1 (en)
AT (1) ATE5857T1 (en)
DE (2) DE3038276A1 (en)

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Publication number Priority date Publication date Assignee Title
GB9104370D0 (en) * 1991-03-01 1991-04-17 British Aerospace Manufacture of track cans
US5271142A (en) * 1991-05-09 1993-12-21 Soundwich, Inc. Method for producing a sound-dampened automotive enclosure
GB2284569A (en) * 1993-12-08 1995-06-14 Rolls Royce Plc Manufacture of similarly shaped components
US5775412A (en) * 1996-01-11 1998-07-07 Gidding Engineering, Inc. High pressure dense heat transfer area heat exchanger
US6550124B2 (en) * 2001-06-29 2003-04-22 General Motors Corporation Method for adhering reinforcing patches during superplastic forming
FR2901016B1 (en) * 2006-05-12 2008-07-18 Kapp France Sa HEAT EXCHANGER WITH WELDED EXCHANGE PLATES
KR20130043812A (en) * 2011-10-21 2013-05-02 현대자동차주식회사 Tail trim manufacturing method by using clad metal plate

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Publication number Priority date Publication date Assignee Title
US90322A (en) * 1869-05-18 Island
DD33913A (en) *
US1851559A (en) * 1930-12-01 1932-03-29 Vulcan Soot Cleaner Company Fluid cooled cleaner element
US2005591A (en) * 1933-05-27 1935-06-18 Reconstruction Finance Corp Method of making dies
US2270185A (en) * 1940-08-15 1942-01-13 Dow Chemical Co Simultaneous manufacture of containers and closures
US3206836A (en) * 1961-10-17 1965-09-21 Edward M Schlussler Method of manufacturing water cooled exhaust manifolds
GB1084625A (en) * 1966-02-16 1967-09-27 Ford Motor Co Method of making a set of die facings for metal pressing operations
JPS5311922B2 (en) * 1973-07-09 1978-04-25
FR2350539A1 (en) * 1976-05-07 1977-12-02 Saunier Duval CONNECTION ELBOW FOR TWO CONCENTRIC TUBES
GB1546849A (en) * 1976-09-15 1979-05-31 British Aluminium Co Ltd Method of making metal containers
US4206598A (en) * 1977-11-09 1980-06-10 Ford Motor Company Low cost cast-in place port liner
US4243093A (en) * 1977-11-17 1981-01-06 Caterpillar Tractor Co. Method of making an insulated manifold with double cast walls

Also Published As

Publication number Publication date
ATE5857T1 (en) 1984-02-15
EP0049744A3 (en) 1982-09-15
DE3161971D1 (en) 1984-02-23
EP0049744A2 (en) 1982-04-21
US4440337A (en) 1984-04-03
DE3038276A1 (en) 1982-05-19

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