EP0331938B1 - Apparatus for accurately attaching several components to a hollow body - Google Patents

Apparatus for accurately attaching several components to a hollow body Download PDF

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Publication number
EP0331938B1
EP0331938B1 EP89102668A EP89102668A EP0331938B1 EP 0331938 B1 EP0331938 B1 EP 0331938B1 EP 89102668 A EP89102668 A EP 89102668A EP 89102668 A EP89102668 A EP 89102668A EP 0331938 B1 EP0331938 B1 EP 0331938B1
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EP
European Patent Office
Prior art keywords
mould
housing
components
guide
hollow body
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
Application number
EP89102668A
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German (de)
French (fr)
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EP0331938A3 (en
EP0331938A2 (en
Inventor
Herbert Krips
Miroslan Dr. Podhorsky
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Balcke Duerr AG
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Balcke Duerr AG
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Publication date
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Priority to AT89102668T priority Critical patent/ATE78200T1/en
Publication of EP0331938A2 publication Critical patent/EP0331938A2/en
Publication of EP0331938A3 publication Critical patent/EP0331938A3/en
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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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/84—Making other particular articles other parts for engines, e.g. connecting-rods
    • B21D53/845—Making camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts

Definitions

  • the invention relates to a device for the precise position fixing of several parts, each provided with an opening, on a hollow body, in particular cams and bearing shells on a camshaft, the opening in the parts being larger than their respective fastening point on the hollow body in the initial state and the parts in the predetermined position is brought onto the hollow body before the fastening process takes place by widening the hollow body at least in the area of the fastening points, for which purpose the parts to be fastened are inserted into recesses of a shape which is at least two-part in the axial direction, the hollow body is inserted into the openings of the parts and the molded parts are aligned and held to one another by a surrounding housing.
  • a device is e.g. already known from document EP-A-02 30 731, which is considered to be the closest prior art.
  • a device of the type described above is known from DE-A-36 16 901. It is used to manufacture a camshaft, which is produced by pushing cam disks onto a hollow shaft, introducing the structure thus formed into a shape and expanding the hollow shaft, this expansion taking place by introducing a fluid under high pressure.
  • the mold consists of two mold halves, which are provided with corresponding recesses for the cam discs. This mold, which is divided in two in the axial direction, is inserted into a likewise two-part housing during the expansion process, which holds the two mold halves together.
  • camshafts Since it is of crucial importance in the production of camshafts that the individual cam disks are positioned exactly on the hollow shaft so that later processing of the cams can be avoided or reduced to a minimum, high demands are placed on the design of the shape as well the alignment of the mold halves during the manufacturing process. If the cam disks can twist or shift in the axial direction within the recesses of the two mold halves and if the two mold halves are not exactly aligned with one another and held in this aligned state, either unusable camshafts result or the individual cams are required with great effort to edit.
  • the invention has for its object to develop a device of the type described in such a way that on the one hand there is an exact positional determination of the parts to be fastened on a hollow body, each provided with an opening, and on the other hand there is an exact assignment of the individual molded parts to one another when the multi-part Form is held together by the surrounding housing.
  • the solution to this problem by the invention is characterized in that the mold is divided into a plurality of axial mold sections which are formed with end-face contact surfaces, axially extending guide surfaces which bring about an alignment in the circumferential direction, and a conical lateral surface on which a for centering the mold sections a conical centering provided housing can be pushed.
  • each axial shaped section preferably being designed to receive such a part.
  • the axial mold sections are assembled after the parts have been inserted to form the overall shape, with an exact alignment of the mold sections in the circumferential direction being effected by guide surfaces which run in the axial direction.
  • the axial shaped sections are finally centered via their conical lateral surfaces when a housing with a conical centering surface designed according to the conical lateral surface of the shaped sections is pushed onto the assembled mold.
  • the shape according to the invention consisting of axial mold sections, thus automatically causes the parts to be fastened to the hollow body to be aligned precisely, since exact positioning in the axial direction is achieved via the end faces, alignment in the circumferential direction via the axially extending guide surfaces, and centering via the conical lateral surfaces of the individual mold sections takes place without overdeterminations occurring or gaps forming during assembly.
  • the housing is designed in one piece in the manner of a bell.
  • the axially extending guide surfaces can be designed as a bore formed in each part of the mold sections which are at least two-part in the axial direction and into which one of at least two guide rods arranged in the housing engages.
  • the guidance and alignment in the circumferential direction is carried out by precise and easy to manufacture cylindrical bores and guide rods.
  • the axially extending guide surfaces are designed as guide strips or guide grooves which are formed on the conical lateral surface of each part of the shaped sections which are at least two-part in the axial direction and which cooperate with a corresponding guide groove or guide strip in or on the conical centering surface of the housing.
  • the bottom of the bell-like housing can be designed as a contact surface for the last molded section and the first molded section can rest against the contact surface of a bearing part, which is also provided with a guide and sealing surface for the hollow body, so that its sealing after its insertion into the Form is achieved automatically.
  • This camshaft consists of a hollow shaft 1, on which a total of eight cams 2 and a flange 3 are to be fastened in the exemplary embodiment.
  • a mold which, in the exemplary embodiment, consists of a total of nine mold sections 4.
  • Each shaped section 4 is divided in two in the axial direction, as can be seen from FIGS. 2 to 3 and 6.
  • Each of these mold sections 4 has a recess for receiving a cam 2 or the flange 3, as again best shown in FIGS. 1 and 5.
  • each molded section 4 is provided with end-face contact surfaces 4a, which are drawn in with respect to the central molded section 4 in FIGS. 1 and 5.
  • the form sections 4 which follow one another in the axial direction abut one another over these end-face contact surfaces 4a, which is also evident from FIGS. 1 and 5.
  • Each of the two-part mold sections 4 is also provided with axially extending guide surfaces 4b, which serve to align the mold sections 4 in the circumferential direction.
  • these guide surfaces 4b are formed by a cylindrical bore.
  • the guide surfaces 4b consist of axial grooves in the outer surface of each two-part molded section 4 (see FIG. 6).
  • the shaped sections 4 are finally formed with conical outer surfaces 4c, so that overall, when the shaped sections 4 are assembled, a shape with a conical outer surface results, as can be seen from the lower halves of FIGS. 1 and 5.
  • a housing 6 is pushed onto the mold composed of the mold sections 4.
  • the housing 6 is provided with a conical centering surface 6a, which causes the individual mold sections 4 to be centered automatically when the housing 6 is pushed on.
  • an axial determination of the position takes place via the end-face contact surfaces 4a and an alignment of the shaped sections 4 in the circumferential direction via the guide surfaces 4b.
  • the last shape lies section 4 with its contact surface 4a on a contact surface 6b of the housing 6, which is formed on the bottom 6c of the housing 6 which is formed in one piece in the manner of a bell.
  • the guide surfaces 4b formed in the form of grooves in the form of grooves cooperate with guide strips 6d which protrude from the centering surface 6a of the housing 6 in the axial direction.
  • the hollow shaft 1 is expanded in the exemplary embodiments with the aid of a pressure medium introduced into the hollow shaft 1.
  • This pressure medium is supplied with the aid of a mouthpiece 8, for which a passage opening 6e is provided in the bottom 6c of the housing 6.
  • This mouthpiece 8 presses the hollow shaft 1 on the one hand against the guide and sealing surface 5b of the bearing part 5 and, on the other hand, lies sealingly against the other end of the hollow shaft 1, so that no pressure medium can escape.
  • the mouthpiece 8 is removed, the housing 6 is pulled off and the mold sections 4 are removed from the side, so that the finished camshaft can be fed to the finishing process.

Abstract

The invention relates to an apparatus for the positionally accurate attachment of several components (2,3), each provided with an opening, to a hollow body (1), the opening in the components (2,3) being larger in the initial condition than their respective attachment point on the hollow body (1), and the components (2,3) being brought into the predetermined position on the hollow body (1) before the attachment operation is carried out by expanding the hollow body (1), at least in the region of the attachment points. For this purpose, the components (2,3) to be attached are inserted in recesses in a mould divided into at least two parts in the axial direction, the hollow body (1) is inserted into the openings of the components (2,3) and the mould parts are aligned and held relative to one another by a housing (6) which surrounds them. The mould itself is divided into a plurality of axial mould sections (4), which are designed with frontal bearing faces (4a), axially extending guide faces (4b) effecting an alignment in the circumferential direction, and a conical lateral surface (4c). A housing (6) provided with a conical centring surface (6a) can be pushed onto the conical lateral surface (4c) for the purpose of centring the mould sections (4). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum lagegenauen Befestigen von mehreren, jeweils mit einer Öffnung versehenen Teilen auf einem Hohlkörper, insbesondere von Nocken und Lagerschalen auf einer Nockenwelle, wobei im Ausgangszustand die Öffnung in den Teilen größer als ihre jeweilige Befestigungsstelle am Hohlkörper ist und die Teile in die vorgegebene Position auf dem Hohlkörper gebracht werden, bevor der Befestigungsvorgang durch Aufweiten des Hohlkörpers zumindest im Bereich der Befestigungsstellen erfolgt, wozu die zu befestigenden Teile in Aussparungen einer in axialer Richtung mindestens zweigeteilten Form eingelegt werden, der Hohlkörper in die Öffnungen der Teile eingesetzt wird und die Formteile durch ein sie umgebendes Gehäuse zueinander ausgerichtet und gehalten werden. Eine solche Vorrichtung ist z.B. aus Dokument EP-A-02 30 731, das als nächstliegender Stand der Technik angesehen wird, schon bekannt.The invention relates to a device for the precise position fixing of several parts, each provided with an opening, on a hollow body, in particular cams and bearing shells on a camshaft, the opening in the parts being larger than their respective fastening point on the hollow body in the initial state and the parts in the predetermined position is brought onto the hollow body before the fastening process takes place by widening the hollow body at least in the area of the fastening points, for which purpose the parts to be fastened are inserted into recesses of a shape which is at least two-part in the axial direction, the hollow body is inserted into the openings of the parts and the molded parts are aligned and held to one another by a surrounding housing. Such a device is e.g. already known from document EP-A-02 30 731, which is considered to be the closest prior art.

Eine Vorrichtung der voranstehend beschriebenen Art ist aus der DE-A-36 16 901 bekannt. Sie dient zum Herstellen einer Nockenwelle, die durch Aufschieben von Nockenscheiben auf eine Hohlwelle, Einbringen der so gebildeten Konstruktion in eine Form und Aufweiten der Hohlwelle hergestellt wird, wobei dieses Aufweiten durch Einbringen eines unter hohem Druck stehenden Fluids erfolgt. Die Form besteht aus zwei Formhälften, die mit entsprechenden Aussparungen für die Nockenscheiben versehen sind. Diese in axialer Richtung zweigeteilte Form wird während des Aufweitvorganges in ein ebenfalls zweiteiliges Gehäuse eingesetzt, das die beiden Formhälften zusammenhält.A device of the type described above is known from DE-A-36 16 901. It is used to manufacture a camshaft, which is produced by pushing cam disks onto a hollow shaft, introducing the structure thus formed into a shape and expanding the hollow shaft, this expansion taking place by introducing a fluid under high pressure. The mold consists of two mold halves, which are provided with corresponding recesses for the cam discs. This mold, which is divided in two in the axial direction, is inserted into a likewise two-part housing during the expansion process, which holds the two mold halves together.

Da es bei der Herstellung von Nockenwellen entscheidend darauf ankommt, daß die einzelnen Nockenscheiben exakt auf der Hohlwelle positioniert werden, damit eine spätere Bearbeitung der Nocken vermieden bzw. auf ein Minimum reduziert werden kann, werden hohe Anforderungen sowohl an die Ausbildung der Form als auch an die Ausrichtung der Formhälften während des Herstellungsvorgangs gestellt. Wenn sich die Nockenscheiben innerhalb der Aussparungen der beiden Formhälften verdrehen oder in axialer Richtung verlagern können und wenn die beiden Formhälften nicht exakt zueinander ausgerichtet und in diesem ausgerichteten Zustand gehalten werden, ergeben sich entweder unbrauchbare Nockenwellen oder es wird erforderlich, die einzelnen Nocken mit großem Aufwand zu bearbeiten.Since it is of crucial importance in the production of camshafts that the individual cam disks are positioned exactly on the hollow shaft so that later processing of the cams can be avoided or reduced to a minimum, high demands are placed on the design of the shape as well the alignment of the mold halves during the manufacturing process. If the cam disks can twist or shift in the axial direction within the recesses of the two mold halves and if the two mold halves are not exactly aligned with one another and held in this aligned state, either unusable camshafts result or the individual cams are required with great effort to edit.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs beschriebenen Art derart weiterzubilden, daß sich einerseits eine exakte Lagestimmung der auf einem Hohlkörper zu befestigenden, jeweils mit einer Öffnung versehenen Teile ergibt und andererseits eine exakte Zuordnung der einzelnen Formteile zueinander erfolgt, wenn die mehrteilige Form von dem sie umgebenden Gehäuse zusammengehalten wird.The invention has for its object to develop a device of the type described in such a way that on the one hand there is an exact positional determination of the parts to be fastened on a hollow body, each provided with an opening, and on the other hand there is an exact assignment of the individual molded parts to one another when the multi-part Form is held together by the surrounding housing.

Die Lösung dieser Aufgabenstellung durch die Erfindung ist dadurch gekennzeichnet, daß die Form in mehrere axiale Formabschnitte unterteilt ist, die mit stirnseitigen Anlageflächen, axial verlaufenden, eine Ausrichtung in Umfangsrichtung bewirkenden Führungsflächen und einer konischen Mantelfläche ausgebildet sind, auf die zur Zentrierung der Formabschnitte ein mit einer konischen Zentrierfläche versehenes Gehäuse aufschiebbar ist.The solution to this problem by the invention is characterized in that the mold is divided into a plurality of axial mold sections which are formed with end-face contact surfaces, axially extending guide surfaces which bring about an alignment in the circumferential direction, and a conical lateral surface on which a for centering the mold sections a conical centering provided housing can be pushed.

Durch die erfindungsgemäße Aufteilung der Form in mehrere axiale Formabschnitte lassen sich die Aussparungen in diesen Formabschnitten besonders gut den jeweils aufzunehmenden, auf dem Hohlkörper zu befestigenden Teilen anpassen, wobei vorzugsweise jeder axiale Formabschnitt zur Aufnahme eines derartigen Teiles ausgebildet wird. Mit Hilfe ihrer stirnseitigen Anlageflächen werden die axialen Formabschnitte anschließend an das Einlegen der Teile zur Bildung der Gesamtform zusammengesetzt, wobei eine exakte Ausrichtung der Formabschnitte in Umfangsrichtung durch Führungsflächen erfolgt, die in axialer Richtung verlaufen. Über ihre konischen Mantelflächen werden die axialen Formabschnitte schließlich zentriert, wenn ein Gehäuse mit einer entsprechend der konischen Mantelfläche der Formabschnitte ausgeführten konischen Zentrierfläche auf die zusammengesetzte Form aufgeschoben wird. Die erfindungsgemäße, aus axialen Formabschnitten bestehende Form bewirkt somit selbsttätig eine lagegenaue Ausrichtung der auf dem Hohlkörper zu befestigenden Teile, da über die stirnseiten Anlageflächen eine exakte Positionierung in axialer Richtung, über die axial verlaufenden Führungsflächen eine Ausrichtung in Umfangsrichtung und über die konischen Mantelflächen eine Zentrierung der einzelnen Formabschnitte erfolgt, ohne daß Überbestimmungen auftreten oder beim Zusammensetzen Spalte entstehen können.By dividing the shape according to the invention into several axial shape sections, the cutouts can be made in these Adapt the shaped sections particularly well to the parts to be accommodated in each case, which are to be fastened on the hollow body, each axial shaped section preferably being designed to receive such a part. With the help of their end-face contact surfaces, the axial mold sections are assembled after the parts have been inserted to form the overall shape, with an exact alignment of the mold sections in the circumferential direction being effected by guide surfaces which run in the axial direction. The axial shaped sections are finally centered via their conical lateral surfaces when a housing with a conical centering surface designed according to the conical lateral surface of the shaped sections is pushed onto the assembled mold. The shape according to the invention, consisting of axial mold sections, thus automatically causes the parts to be fastened to the hollow body to be aligned precisely, since exact positioning in the axial direction is achieved via the end faces, alignment in the circumferential direction via the axially extending guide surfaces, and centering via the conical lateral surfaces of the individual mold sections takes place without overdeterminations occurring or gaps forming during assembly.

Gemäß einem weiteren Merkmal der Erfindung ist das Gehäuse in der Art einer Glocke einteilig ausgeführt.According to a further feature of the invention, the housing is designed in one piece in the manner of a bell.

Die axial verlaufenden Führungsflächen können bei einer bevorzugten Ausführungsform der Erfindung als eine in jedem Teil der in axialer Richtung mindestens zweigeteilten Formabschnitte ausgebildete Bohrung ausgeführt sein, in die eine von mindestens zwei im Gehäuse angeordneten Führungsstangen eingreift. In diesem Falle erfolgt die Führung und Ausrichtung in Umfangsrichtung durch präzise und einfach herzustellende zylindrische Bohrungen und Führungsstangen. Bei einer alternativen Ausführungsform sind die axial verlaufenden Führungsflächen als auf der konischen Mantelfläche jedes Teils der in axialer Richtung mindestens zweigeteilten Formabschnitte ausgebildete Führungsleisten bzw. Führungsnuten ausgeführt, die mit einer entsprechenden Führungsnut bzw. Führungsleiste in bzw. an der konischen Zentrierfläche des Gehäuses zusammenwirken.In a preferred embodiment of the invention, the axially extending guide surfaces can be designed as a bore formed in each part of the mold sections which are at least two-part in the axial direction and into which one of at least two guide rods arranged in the housing engages. In this case, the guidance and alignment in the circumferential direction is carried out by precise and easy to manufacture cylindrical bores and guide rods. At In an alternative embodiment, the axially extending guide surfaces are designed as guide strips or guide grooves which are formed on the conical lateral surface of each part of the shaped sections which are at least two-part in the axial direction and which cooperate with a corresponding guide groove or guide strip in or on the conical centering surface of the housing.

Erfindungsgemäß kann der Boden des glockenartigen Gehäuses als Anlagefläche für den letzten Formabschnitt ausgebildet sein und der erste Formabschnitt an der Anlagefläche eines Lagerteils anliegen, der zugleich mit einer Führungs- und Dichtfläche für den Hohlkörper versehen ist, so daß auch dessen Abdichtung nach seinem Einsetzen in die Form selbsttätig erreicht wird.According to the invention, the bottom of the bell-like housing can be designed as a contact surface for the last molded section and the first molded section can rest against the contact surface of a bearing part, which is also provided with a guide and sealing surface for the hollow body, so that its sealing after its insertion into the Form is achieved automatically.

Schließlich wird mit der Erfindung vorgeschlagen, im Boden des Gehäuses eine Durchtrittsöffnung für ein Mundstück zur Zufuhr eines Aufweitmediums in das Innere des Hohlkörpers auszubilden, wobei dieses Mundstück an das offene Ende des mindestens im Bereich der zu befestigenden Teile aufzuweitenden Hohlkörpers dichtend angepreßt wird.Finally, it is proposed with the invention to form a through opening for a mouthpiece for supplying an expansion medium into the interior of the hollow body in the bottom of the housing, this mouthpiece being pressed tightly against the open end of the hollow body to be expanded at least in the area of the parts to be fastened.

Auf der Zeichnung sind zwei Ausführungsbeispiele der erfindungsgemäßen Vorrichtung dargestellt, und zwar zeigen:

  • Fig. 1 einen Längsschnitt durch eine erste Ausführungsform,
  • Fig. 2 eine Draufsicht gemäß der Schnittlinie II - II in Fig.1,
  • Fig. 3 einen Schnitt gemäß der Schnittlinie III- III in Fig.1,
  • Fig. 4 einen Schnitt gemäß der Schnittlinie IV - IV in Fig.1,
  • Fig. 5 einen der Fig.1 entsprechenden Längsschnitt durch eine zweite Ausführungsform,
  • Fig. 6 einen Querschnitt gemäß der Schnittlinie VI - VI in Fig.5 und
  • Fig. 7 einen Querschnitt gemäß der Schnittlinie VII-VII in Fig.5
Two exemplary embodiments of the device according to the invention are shown in the drawing, namely:
  • 1 shows a longitudinal section through a first embodiment,
  • 2 is a plan view along the section line II - II in Figure 1,
  • 3 shows a section along the section line III-III in FIG. 1,
  • 4 shows a section along the section line IV-IV in FIG. 1,
  • 5 shows a longitudinal section corresponding to FIG. 1 through a second embodiment,
  • Fig. 6 shows a cross section along the section line VI - VI in Fig.5 and
  • 7 shows a cross section along the section line VII-VII in FIG. 5

Die Vorrichtung zum lagegenauen Befestigen von mehreren Teilen auf einem Hohlkörper soll nachfolgend an zwei Ausführungsbeispielen zur Herstellung einer Nockenwelle erläutert werden. Diese Nockenwelle besteht aus einer Hohlwelle 1, auf der beim Ausführungsbeispiel insgesamt acht Nocken 2 und ein Flansch 3 befestigt werden sollen.The device for the precise location of several parts on a hollow body will be explained below using two exemplary embodiments for producing a camshaft. This camshaft consists of a hollow shaft 1, on which a total of eight cams 2 and a flange 3 are to be fastened in the exemplary embodiment.

Um diese, jeweils mit einer Öffnung versehenen Teile 2 und 3 lagegenau auf der Hohlwelle 1 anzuordnen, wird eine Form verwendet, die beim Ausführungsbeispiel aus insgesamt neun Formabschnitten 4 besteht. Jeder Formabschnitt 4 ist in axialer Richtung zweigeteilt, wie sich aus den Figuren 2 bis 3 bzw. 6 ergibt. Jeder dieser Formabschnitte 4 weist eine Aussparung zur Aufnahme eines Nockens 2 bzw. des Flansches 3 auf, wie wiederum am besten aus den Figuren 1 bzw. 5 hervorgeht.In order to arrange these parts 2 and 3, each provided with an opening, in a precise position on the hollow shaft 1, a mold is used which, in the exemplary embodiment, consists of a total of nine mold sections 4. Each shaped section 4 is divided in two in the axial direction, as can be seen from FIGS. 2 to 3 and 6. Each of these mold sections 4 has a recess for receiving a cam 2 or the flange 3, as again best shown in FIGS. 1 and 5.

Um die Formabschnitte 4 zur Gesamtform zusammensetzen zu können, ist jeder Formabschnitt 4 mit stirnseitigen Anlageflächen 4a versehen, die bezüglich des mittleren Formabschnittes 4 in Fig.1 und 5 eingezeichnet sind. Über diese stirnseitigen Anlageflächen 4a liegen die in Achsrichtung aufeinanderfolgenden Formabschnitte 4 aneinander an, was ebenfalls aus den Figuren 1 und 5 hervorgeht.In order to be able to assemble the molded sections 4 to form the overall shape, each molded section 4 is provided with end-face contact surfaces 4a, which are drawn in with respect to the central molded section 4 in FIGS. 1 and 5. The form sections 4 which follow one another in the axial direction abut one another over these end-face contact surfaces 4a, which is also evident from FIGS. 1 and 5.

Jeder der zweiteiligen Formabschnitte 4 ist darüber hinaus mit axial verlaufenden Führungsflächen 4b versehen, die der Ausrichtung der Formabschnitte 4 in Umfangsrichtung dienen. Beim ersten Ausführungsbeispiel nach den Figuren 1 bis 4 werden diese Führungsflächen 4b durch eine zylindrische Bohrung gebildet. Bei der zweiten Ausführungsform nach den Figuren 5 und 6 bestehen die Führungsflächen 4b aus axialen Nuten in der Mantelfläche jedes zweiteiligen Formabschnittes 4 (siehe Fig.6).Each of the two-part mold sections 4 is also provided with axially extending guide surfaces 4b, which serve to align the mold sections 4 in the circumferential direction. In the first exemplary embodiment according to FIGS. 1 to 4, these guide surfaces 4b are formed by a cylindrical bore. In the second embodiment according to FIGS. 5 and 6, the guide surfaces 4b consist of axial grooves in the outer surface of each two-part molded section 4 (see FIG. 6).

Die Formabschnitte 4 sind schließlich mit konischen Mantelflächen 4c ausgebildet, so daß sich bei zusammengesetzten Formabschnitten 4 insgesamt eine Form mit einer konischen Mantelfläche ergibt, wie dies die unteren Hälften der Figuren 1 und 5 erkennen lassen.The shaped sections 4 are finally formed with conical outer surfaces 4c, so that overall, when the shaped sections 4 are assembled, a shape with a conical outer surface results, as can be seen from the lower halves of FIGS. 1 and 5.

Diese Darstellungen zeigen auch, daß der jeweils erste Formabschnitt 4 auf der Anlagefläche 5a eines Lagerteils 5 anliegt. Dieser Lagerteil 5 ist weiterhin mit einer Führungs- und Dichtfläche 5b für die Hohlwelle 1 versehen. An dieser Führungs- und Dichtfläche 5b liegt die Hohlwelle 1 dichtend an, wenn diese durch die Öffnungen der Teile 2 und 3 hindurch in ihre endgültige Position geschoben wird.These representations also show that the respective first molded section 4 rests on the contact surface 5a of a bearing part 5. This bearing part 5 is further provided with a guide and sealing surface 5b for the hollow shaft 1. The hollow shaft 1 lies sealingly against this guide and sealing surface 5b when it is pushed through the openings of the parts 2 and 3 into its final position.

Sobald die Form in der voranstehend beschriebenen Weise zusammengesetzt und damit die Teile 2 und 3 relativ zur Hohlwelle 1 in ihrer Lage bestimmt worden sind, wird ein Gehäuse 6 auf die aus den Formabschnitten 4 zusammengesetzte Form aufgeschoben. Das Gehäuse 6 ist mit einer konischen Zentrierfläche 6a versehen, die beim Aufschieben des Gehäuses 6 selbsttätig ein Zentrieren der einzelnen Formabschnitte 4 bewirkt. Gleichzeitig erfolgt über die stirnseitigen Anlageflächen 4a eine axiale Lagebestimmung und über die Führungsflächen 4b eine Ausrichtung der Formabschnitte 4 in Umfangsrichtung. Bei aufgeschobenem Gehäuse 6 liegt der letzte Form abschnitt 4 mit seiner Anlagefläche 4a an einer Anlagefläche 6b des Gehäuses 6 an, die am Boden 6c des einteilig in der Art einer Glocke ausgebildeten Gehäuses 6 ausgebildet ist.As soon as the mold is assembled in the manner described above and the parts 2 and 3 have been determined in their position relative to the hollow shaft 1, a housing 6 is pushed onto the mold composed of the mold sections 4. The housing 6 is provided with a conical centering surface 6a, which causes the individual mold sections 4 to be centered automatically when the housing 6 is pushed on. At the same time, an axial determination of the position takes place via the end-face contact surfaces 4a and an alignment of the shaped sections 4 in the circumferential direction via the guide surfaces 4b. When the housing 6 is pushed on, the last shape lies section 4 with its contact surface 4a on a contact surface 6b of the housing 6, which is formed on the bottom 6c of the housing 6 which is formed in one piece in the manner of a bell.

Beim ersten Ausführungsbeispiel nach den Figuren 1 bis 4 greifen in die als Bohrungen ausgebildeten Führungsflächen 4b der Formabschnitte 4 Führungsstangen 7 ein, die im Inneren des Gehäuses 6 angeordnet sind. Bei der zweiten Ausführungsform nach den Figuren 5 und 6 wirken die in den Formabschnitten 4 in Form von Nuten ausgebildeten Führungsflächen 4b mit Führungsleisten 6d zusammen, die in axialer Richtung aus der Zentrierfläche 6a des Gehäuses 6 hervorstehen.In the first exemplary embodiment according to FIGS. 1 to 4, guide rods 7, which are arranged in the interior of the housing 6, engage in the guide surfaces 4b of the shaped sections 4, which are designed as bores. In the second embodiment according to FIGS. 5 and 6, the guide surfaces 4b formed in the form of grooves in the form of grooves cooperate with guide strips 6d which protrude from the centering surface 6a of the housing 6 in the axial direction.

Sobald die Form mit den zu befestigenden Teilen 2 und 3 zusammengesetzt, die Hohlwelle 1 eingeschoben und das Gehäuse 6 ordnungsgemäß aufgesetzt worden ist, erfolgt bei den Ausführungsbeispielen ein Aufweiten der Hohlwelle 1 mit Hilfe eines in die Hohlwelle 1 eingebrachten Druckmittels. Dieses Druckmittel wird mit Hilfe eines Mundstückes 8 zugeführt, für das im Boden 6c des Gehäuses 6 eine Durchtrittsöffnung 6e vorgesehen ist. Dieses Mundstück 8 drückt die Hohlwelle 1 einerseits gegen die Führungs- und Dichtfläche 5b des Lagerteils 5 und liegt andererseits dichtend am anderen Ende der Hohlwelle 1 an, so daß kein Druckmedium entweichen kann. Nach erfolgtem Aufweitvorgang werden das Mundstück 8 entfernt, das Gehäuse 6 abgezogen und die Formabschnitte 4 seitlich abgenommen, so daß die fertige Nockenwelle der Endbearbeitung zugeführt werden kann.As soon as the mold has been assembled with the parts 2 and 3 to be fastened, the hollow shaft 1 has been inserted and the housing 6 has been properly fitted, the hollow shaft 1 is expanded in the exemplary embodiments with the aid of a pressure medium introduced into the hollow shaft 1. This pressure medium is supplied with the aid of a mouthpiece 8, for which a passage opening 6e is provided in the bottom 6c of the housing 6. This mouthpiece 8 presses the hollow shaft 1 on the one hand against the guide and sealing surface 5b of the bearing part 5 and, on the other hand, lies sealingly against the other end of the hollow shaft 1, so that no pressure medium can escape. After the expansion process, the mouthpiece 8 is removed, the housing 6 is pulled off and the mold sections 4 are removed from the side, so that the finished camshaft can be fed to the finishing process.

Bezugsziffernliste:List of reference numbers:

11
HohlwelleHollow shaft
22nd
NockeCam
33rd
Flanschflange
44th
FormabschnittMolding section
4a4a
AnlageflächeContact surface
4b4b
FührungsflächeLeadership area
4c4c
MantelflächeLateral surface
55
LagerteilBearing part
5a5a
AnlageflächeContact surface
5b5b
Führungs- und DichtflächeGuide and sealing surface
66
Gehäusecasing
6a6a
ZentrierflächeCentering surface
6b6b
AnlageflächeContact surface
6c6c
Bodenground
6d6d
FührungsleisteGuide bar
6e6e
DurchtrittsöffnungPassage opening
77
FührungsstangeGuide rod
88th
MundstückMouthpiece

Claims (6)

1. Apparatus for accurately securing a plurality of components (2), each having an aperture, to a hollow member (1), more particularly for accurately securing cams and bearing shells to a camshaft, the aperture in the components (2) in the initial state being larger than its respective securing site on the hollow member (1), and the components (2) being brought into the predetermined position on the hollow member (1) before the securing process takes place by expansion of the hollow member (1) at least in the vicinity of the securing sites, to which end the components (2) to be secured are placed in recesses in a mould split axially into at least two parts, the hollow member (1) is inserted in the apertures in the components (2) and the mould parts are mutually aligned and retained by a housing (6) embracing them, in which apparatus the mould is divided into a plurality of axial mould sections (4), which have bearing surfaces (4a) on their end faces and have axial guide surfaces (4b) for effecting alignment in the peripheral direction,
characterised in that
the mould divided into a plurality of axial mould sections (4) has a conical generated surface (4c) onto which, to centre the mould sections (4), a housing (6) with a conical centering surface (6a) can be pushed.
2. Apparatus as claimed in claim 1, characterised in that the housing (6) is constructed in one piece like a bell.
3. Apparatus as claimed in claim 1 or 2, characterised in that the axial guide surfaces (4b) are in the form of a bore, which is provided in each part of the mould sections (4) split axially into at least two parts, and which is engaged by one of at least two guide rods (7) mounted in the housing (6).
4. Apparatus as claimed in claim 1 or 2, characterised in that the axial guide surfaces (4b) are in the form of guide ribs or guide grooves, which are provided on the conical generated surface (4c) of each part of the mould sections (4) split axially into at least two parts, and which co-operate with a corresponding guide groove or guide rib (6d) in or on the conical centering surface (6a) of the housing (6).
5. Apparatus as claimed in at least one of claims 1 to 4, characterised in that the base (6c) of the bell-like housing (6) is designed to act as a bearing surface (6b) for the last mould section (4), and the first mould section (4) bears on the bearing surface (5a) of a bearing member (5), which also has a guide and sealing surface (5b) for the hollow member (1).
6. Apparatus as claimed in at least one of claims 1 to 5, characterised in that the base (6c) of the housing (6) contains a passage (6e) for a nozzle (8) for supplying expansion medium to the interior of the hollow member (1).
EP89102668A 1988-03-10 1989-02-16 Apparatus for accurately attaching several components to a hollow body Expired - Lifetime EP0331938B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102668T ATE78200T1 (en) 1988-03-10 1989-02-16 DEVICE FOR PRECISELY FIXING SEVERAL PARTS ON A HOLLOW BODY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3807817A DE3807817C1 (en) 1988-03-10 1988-03-10
DE3807817 1988-03-10

Publications (3)

Publication Number Publication Date
EP0331938A2 EP0331938A2 (en) 1989-09-13
EP0331938A3 EP0331938A3 (en) 1990-08-29
EP0331938B1 true EP0331938B1 (en) 1992-07-15

Family

ID=6349285

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89102668A Expired - Lifetime EP0331938B1 (en) 1988-03-10 1989-02-16 Apparatus for accurately attaching several components to a hollow body

Country Status (8)

Country Link
EP (1) EP0331938B1 (en)
KR (1) KR950000066B1 (en)
AT (1) ATE78200T1 (en)
DD (1) DD285937A5 (en)
DE (2) DE3807817C1 (en)
ES (1) ES2033472T3 (en)
GR (1) GR3005759T3 (en)
RU (1) RU1782183C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105149427A (en) * 2015-09-25 2015-12-16 北京灵隆科技有限公司 Machining forming device and method for speaker mesh

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3927896A1 (en) * 1989-08-24 1991-02-28 Balcke Duerr Ag DEVICE FOR FIXING SEVERAL PARTS ON A HOLLOW BODY
DE19831333A1 (en) * 1998-07-13 2000-01-27 Neumayer Erich Gmbh Co Kg Mounting components on hollow shaft, especially cams on camshaft, by introducing supports between components fitted onto shaft prior to shaft expansion step
DE19929957B4 (en) * 1999-06-29 2010-12-30 Daimler Ag Joint connection and a method for producing the same, as well as steering column of motor vehicles
DE102004039302A1 (en) 2004-08-13 2006-02-23 Mahle Ventiltrieb Gmbh Method for producing a camshaft
DE102005034776B3 (en) * 2005-07-26 2007-03-15 Daimlerchrysler Ag Method for producing a camshaft
CN105149963B (en) * 2015-09-25 2018-08-28 北京灵隆科技有限公司 The processing unit (plant) and processing method of speaker net
DE102017004570A1 (en) * 2017-05-11 2018-11-15 Technische Universität Dortmund Tool for hydroforming from individually exchangeable, forming segments

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685327A (en) * 1969-11-12 1972-08-22 Masanobu Nakamura Bulging apparatus
DE2922509A1 (en) * 1979-05-31 1980-12-04 Mannesmann Ag METHOD AND DEVICE FOR PRODUCING CAMSHAFT
JPS61266132A (en) * 1985-05-21 1986-11-25 Musashi Seimitsu Ind Co Ltd Production of assembly cam shaft
US4693138A (en) * 1985-12-31 1987-09-15 Hughes Robert W Cam shaft with expanded hollow shaft
ES2020951B3 (en) * 1986-08-12 1991-10-16 Balcke-Durr Ag PROCEDURE AND DEVICE FOR FIXING PARTS IN A HOLLOW BODY

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105149427A (en) * 2015-09-25 2015-12-16 北京灵隆科技有限公司 Machining forming device and method for speaker mesh
CN105149427B (en) * 2015-09-25 2019-10-18 北京京东尚科信息技术有限公司 The machine-shaping device and method of speaker net

Also Published As

Publication number Publication date
DE58901825D1 (en) 1992-08-20
DE3807817C1 (en) 1989-03-09
ES2033472T3 (en) 1993-03-16
KR890014903A (en) 1989-10-25
EP0331938A3 (en) 1990-08-29
EP0331938A2 (en) 1989-09-13
RU1782183C (en) 1992-12-15
KR950000066B1 (en) 1995-01-09
GR3005759T3 (en) 1993-06-07
ATE78200T1 (en) 1992-08-15
DD285937A5 (en) 1991-01-10

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