EP0613410B1 - Instrument pour la realisation de profils interieurs sans enlevement de copeaux - Google Patents

Instrument pour la realisation de profils interieurs sans enlevement de copeaux Download PDF

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Publication number
EP0613410B1
EP0613410B1 EP92923667A EP92923667A EP0613410B1 EP 0613410 B1 EP0613410 B1 EP 0613410B1 EP 92923667 A EP92923667 A EP 92923667A EP 92923667 A EP92923667 A EP 92923667A EP 0613410 B1 EP0613410 B1 EP 0613410B1
Authority
EP
European Patent Office
Prior art keywords
tool
tool elements
elements
workpiece
spreading element
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
EP92923667A
Other languages
German (de)
English (en)
Other versions
EP0613410A1 (fr
Inventor
Klaus Dietrich
Stefan Schmidt
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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
Priority claimed from DE4138126A external-priority patent/DE4138126A1/de
Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP0613410A1 publication Critical patent/EP0613410A1/fr
Application granted granted Critical
Publication of EP0613410B1 publication Critical patent/EP0613410B1/fr
Anticipated expiration legal-status Critical
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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/56—Making machine elements screw-threaded elements

Definitions

  • the invention relates to a tool for the non-cutting production of internal contours on workpieces and in particular internal threads.
  • the thread rolling is mainly suitable for solid workpieces, whereby it results in a high work hardening and an uninterrupted fiber flow with a short processing time.
  • Threading is essentially suitable for thin-walled, rotationally symmetrical parts, preferably made of aluminum.
  • Threading is created by pushing the thin-walled part between the rollers. However, the part must rotate.
  • Tapping is only suitable if the material thickness is sufficient and produces an interrupted fiber course with a long machining time.
  • a tool for the non-cutting production of internal threads is known.
  • This known tool has two segments which are arranged in a basic state such that they can be inserted into the tubular workpiece.
  • a spreading element moves the segments by moving in a radial direction into an engagement state in which the segments are pressed onto the tubular component in such a way that they (partially) form the thread.
  • this tool does not provide a complete thread if it is not rotated and moved during use, as there are gaps between the segments. This means that no screw can be screwed into the internal thread produced with this tool without additional machining processes.
  • DE 39 33 292 shows a spreading tool for a shaping device for producing hollow workpieces with a desired inner contour.
  • the tool essentially has a three-part construction, which is composed of an inner punch 8, a molding ring 4 which carries out the pressing process and the molding segments 11 and 12 provided within an expansion sleeve.
  • a stamp is inserted into the spreading tool, which, by means of appropriate counterpressure, leaves the mold segments in their closed contour against an external force.
  • the pressing process itself is effected by lowering the form ring 4 so that the material of the workpiece is pressed against the contour of the segments from the outside. It is essential here that the flow of force acts on the workpiece from the outside. The material of the workpiece is thus pressed onto the outer contour of the segment shape which is apparent in the interior of the workpiece. A desired deformation of the inner contour can thus be obtained if, in addition to the inner deformation, the outer contour of the workpiece is also deformed.
  • the invention has for its object a tool for the non-cutting production of inner contours To specify workpieces and in particular internal threads, which allows the production of, for example, "self-contained”, ie all-round contours and in particular of threads with high accuracy and surface quality with a short machining time, without the tool being quickly worn out.
  • inner contours in workpieces should be shaped in this way without changing the outer contour of the workpiece itself.
  • the tool according to the invention should, if appropriate, make it possible to carry out cutting or separating processes.
  • At least three tool elements are provided, which are arranged in the engaged state in such a way that they connect to one another without a gap.
  • the tool elements are provided on their engagement surface with a contour that is complementary to the desired inner contour.
  • the contour of the respective engagement surfaces does not necessarily have to be designed such that a thread is produced. Rather, the tool elements can be provided with a different (even non-uniform) shape instead of a thread, so that any internal contours can be created. If required, these contours can result in a closed circle (360 °).
  • the individual tool elements prefferably be provided with different contours on their engagement surface. This makes it possible, for example, to introduce a thread only over a part of the circumference and to push back the material of the workpiece in the part of the circumference into which no thread is to be introduced "behind the thread base”.
  • very thin-walled, cold-formable materials can be processed without separating the fiber course and a large strain hardening. It is also possible to incorporate sealing surfaces or to calibrate sealing surfaces that have already been created or to protect them from possible damage.
  • the elements can also perform not only a linear movement, but also a movement composed of several linear movements.
  • the tool according to the invention does not require any rotating tool elements or counterholders, i.e. simple requirements are placed on the drives.
  • the tool according to the invention for the non-cutting production of internal contours on workpiece recesses with a free cross section or for carrying out cutting work of such workpieces has, from the inside out, a plurality of tool elements which are arranged in the basic state in such a way that they can be inserted into the recess of the workpiece.
  • an expansion element converts the tool elements into an engagement state in which the workpiece elements are pressed against the workpiece walls in such a way that they form the desired contour or carry out cutting, notching or perforating work.
  • the tool elements are arranged in the engaged state in such a way that they connect to one another without space for the cutting or shearing process (segmentation) of the workpiece.
  • the number of tool elements is determined by the respective cross section of the workpiece.
  • the number of sides or corners of the polygon corresponds to the number of required leading and trailing tool elements. For example, if the workpiece has a rectangular profile, four leading and four lagging tool elements are required.
  • a completely circumferential thread can thus be created by appropriately designing the main and secondary elements.
  • the elements are designed that, starting from an initial position (diameter smaller than thread core diameter), they reach an end position in which they produce a complete thread, ie an end position in which there are no gaps between the individual segments in the extended state.
  • FIG. 1 corresponding representations for a variant of the first embodiment, which differs from the example shown in Fig. 1 in that instead of four tool elements (main elements) 1.1 with a threaded structure on the outer surface and four trailing Tool elements (secondary elements) 1.2 there are three elements each. Accordingly, a hexagonal extension cone 3 is provided.
  • the further training and the mode of operation correspond to the first embodiment.
  • FIG. 3a shows a longitudinal section through a further variant of the first exemplary embodiment
  • FIGS. 3a to 3d show corresponding cross sections, FIG. 3d showing a modification of the design shown in FIGS. 3b and 3c.
  • three main and secondary elements 1.1 and 1.2 are moved linearly outward from a basic state and produce a completely circumferential thread (FIG. 3c).
  • An “intermediate step” is shown in FIG. 3b.
  • Fig. 4 shows a second embodiment in which two main elements formed as circular sections 1.1 rotatably supported on one side and moved outwards on circular paths by a secondary element 1.2.
  • the process can also be viewed as a spreading process between two "jaws”.
  • FIG. 5 shows a third exemplary embodiment, in which a thread contour is provided only on every second segment.
  • the segments without a thread contour are "advanced" over the outer contour of the segments with a thread contour, so that the material of the workpiece is pushed back "behind the thread base" in the part of the circumference into which no thread is to be introduced (FIG. 5c).
  • FIG. 6 shows an exemplary embodiment in which a sealing surface can be produced by a corresponding design of the tool elements in the area of the thread.
  • a sealing surface is to be provided if a closure means with a sealing function is to be introduced into the thread to be produced.
  • This sealing surface can be produced both in the case of external and internal threads by the tool elements and / or additional shape-supporting or shape-generating auxiliary elements 7. If undercuts are created when creating the sealing surface, separable counterholders 5 must be used.
  • extension mechanisms can of course also be used:
  • an eccentrically mounted circular disc or a cam disc is rotated and thus leads the tool elements to the outside.
  • the cam can also be designed in a special curve shape in order to enable targeted shaping or the application of force.
  • the tool elements can also be extended by a lever mechanism, e.g. Articulated lever principle. This results in a forced return.
  • a lever mechanism e.g. Articulated lever principle. This results in a forced return.
  • the tool elements are e.g. radial movement of a wedge extended.
  • the guide system external guidance of the tool elements has been used as the guide system.
  • the tool elements are guided through a plate arranged below or above or plates 2 arranged on both sides with integrated linear guide elements.
  • Rails of various shapes as well as ball or pin guides can be used as guide elements.
  • An internal tool guide can of course also be used.
  • linear guide elements are integrated into the tool elements.
  • the guide elements can be designed as plates with guide rails in various shapes or as pin guides.
  • Radial or axial bearings can also be used. Such bearings are used especially in lever systems used and replace the linear guide elements.
  • the forced return can be generated by a lever mechanism, which causes the tool elements to be extended and retracted.
  • Another possibility of the forced reset can be done by interlocking guide systems both in the tool elements and in an extension cone or wedge. As a result, the tool elements are forcibly retracted during the return stroke of the extension cone.
  • FIG. 7 shows an exemplary embodiment of a tool for carrying out complete separating processes (segmentation) from the inside to the outside.
  • the tool is inserted into the hollow profile.
  • leading tool elements 1.1 main elements
  • trailing tool elements 1.2 secondary elements
  • the tool elements 1.2 are retracted and extended by means of a cross-shaped extension cone 3 as a spreading element.
  • the tool elements 1.1 are guided through a cover and base plate 2 with pins and elongated holes in the tool elements or through other suitable guide systems.
  • the secondary elements 1.2 are connected by interlocking guides with the main elements and the outer cone 3, so that a forced forward or return occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling, Broaching, Filing, Reaming, And Others (AREA)
  • Turning (AREA)
  • Punching Or Piercing (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (18)

  1. Dispositif à réaliser des profils intérieurs, sans enlèvement de copeaux, à un creux d'une pièce à usiner, en particulier à réaliser des filets de vis intérieurs,
       comprenant plusieurs éléments d'outil à former le profil intérieur de ladite pièce à usiner, qui, en un état initial, sont disposés de façon à permettre leur introduction dans ladite pièce (6), et qui arrivent dans un état d'emboîtement, moyennant un déplacement radial contre ledit creux de ladite pièce à usiner, de façon à être contigus l'un à l'autre sans solution de continuité,
       caractérisé en ce qu'un élément écarteur (3) est prévu, qui est introduisable centralement entre lesdits éléments d'outil, en sens orthogonal au sens de déplacement desdits éléments d'outil, en les pressant, au cours de l'introduction dudit élément écarteur, dont la périphérie extérieur s'augmente, à guidage forcé et avec application d'une force, contre ledit creux dans ladite pièce à usiner, et en induisant la déformaton du profil intérieur de ladite pièce à usiner dès que l'état d'emboîtement soit achevé.
  2. Dispositif selon la revendication 1,
    caractérisé en ce qu'au moins trois éléments d'outil sont prévus.
  3. Dispositif selon la revendication 1,
    caractérisé en ce que ledit outil comprend au moins deux éléments d'outil en avance (1.1) et deux éléments d'outil en retard (1.2), qui, en état initial, sont disposés au dedans le profil extérieur desdits éléments d'outil en avance.
  4. Dispositif selon une quelconque des revendications 1 à 3,
    caractérisé en ce que ledit élément écarteur comprend un mécanisme d'avance et un guide pour lesdits éléments d'outil.
  5. Dispositif selon la revendication 4,
    caractérisé en ce que ledit mécanisme d'avance est une came d'avance, un mécanisme à lever, ou un coin ou respectivement cône d'avance.
  6. Dispositif selon la revendication 4 ou 5,
    caractérisé en ce que ledit guide est un guide intérieur, qui permet un mouvement linéaire ou un mouvement composite constitué par plusieurs mouvements linéaires.
  7. Dispositif selon la revendication 4 ou 5,
    caractérisé en ce que ledit guide comprend des paliers ou butées.
  8. Dispositif selon une quelconque des revendications 1 à 7,
    caractérisé en ce que ledit élément écarteur comprend un mécanisme de rappel.
  9. Dispositif selon une quelconque des revendications 1 à 8,
    caractérisé en ce que lesdits éléments d'outil présentent des profils différents à leur face de raccordement.
  10. Dispositif selon une quelconque des revendications 1 à 9,
    caractérisé en ce que ledit outil à des éléments d'outil emboîtés est utilisable aussi comme support porte-pièce pour des opérations d'usinage ultérieures.
  11. Dispositif selon une quelconque des revendications 1 à 10,
    caractérisé en ce qu'un contre-élément (5) est utilisable pour l'usinage des parties (6) de pièce à parois minces.
  12. Dispositif selon la revendication 1,
    caractérisé en ce que lesdits éléments d'outil (1) comprennent des arêtes coupantes, qui, en état emboîté, sont disposées de façon qu'elles sont raccordées l'une à l'autre sans solution de continuité.
  13. Dispositif selon la revendication 12,
    caractérisé en ce que le nombre des éléments d'outil est déterminé par la section transversale polygonale respective, le nombre de côtés ou respectivement de coins du polygone correspondant au nombre respectif desdits éléments d'outil en avance (1.1) ainsi que desdits éléments d'outil en retard (1.2) pour des profils triangulaires et rectangulaires de ladite pièce à usiner.
  14. Dispositif selon la revendications 12 ou 13,
    caractérisé en ce qu'il se prête à l'emploi à couper, créer des lacunes, perforations, d'entailles, etc., également dans des matériaux non métalliques, comme des tubes en carton ou des profils en matière plastique, par exemple.
  15. Dispositif selon la revendication 12,
    caractérisé en ce qu'il se prête à l'emploi à joindre des raccords tube/moyeu à forme particulière, par exemple moyennant le dégagement d'attaches, des éléments entraîneurs ou éléments similaires, qui s'engagent dans le moyeu afin d'établir ainsi un raccord géométrique.
  16. Dispositif selon la revendication 12,
    caractérisé en ce qu'il produit le profil intérieur souhaité non seulement moyennant lesdits éléments d'outil mais aussi moyennant ledit élément écarteur à une configuration en correspondance avec le profil intérieur, qui est introduit axialement.
  17. Dispositif selon la revendication 12,
    caractérisé en ce que lesdits segments d'outil sont avancés par des disques à came par un mouvement tournant.
  18. Dispositif selon la revendication 12,
    caractérisé en ce que sous forme d'une combinaison d'outils, il se prête à élargir et à avancer ultérieurement des segments d'outil supplémentaires.
EP92923667A 1991-11-19 1992-11-19 Instrument pour la realisation de profils interieurs sans enlevement de copeaux Expired - Lifetime EP0613410B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4138126A DE4138126A1 (de) 1991-11-19 1991-11-19 Werkzeug zur spanlosen herstellung von aussen- oder innenkonturen an werkstuecken
DE4138126 1991-11-19
DE4226084 1992-08-06
DE4226084A DE4226084A1 (de) 1991-11-19 1992-08-06 Werkzeug zur spanlosen Herstellung von Außen- oder Innenkonturen
PCT/DE1992/000968 WO1993009896A1 (fr) 1991-11-19 1992-11-19 Instrument pour la realisation de profils exterieurs ou interieurs sans enlevement de copeaux

Publications (2)

Publication Number Publication Date
EP0613410A1 EP0613410A1 (fr) 1994-09-07
EP0613410B1 true EP0613410B1 (fr) 1996-05-01

Family

ID=25909309

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Application Number Title Priority Date Filing Date
EP92923667A Expired - Lifetime EP0613410B1 (fr) 1991-11-19 1992-11-19 Instrument pour la realisation de profils interieurs sans enlevement de copeaux

Country Status (4)

Country Link
EP (1) EP0613410B1 (fr)
AT (1) ATE137426T1 (fr)
DE (2) DE4226084A1 (fr)
WO (1) WO1993009896A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1099931A (ja) * 1996-09-30 1998-04-21 M H Center:Kk 内螺子を有する金属製部品の製造方法及びその装置
DE112008003741A5 (de) * 2007-12-21 2010-11-25 Ifm Electronic Gmbh Verfahren und Vorrichtung zum Herstellen eines Gewindes sowie Bauteil und Gerät
DE102017203701A1 (de) 2017-03-07 2018-09-13 Metallwarenfabrik Haugg GmbH Vorrichtung und Verfahren zur Herstellung eines Gewindeformteils

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1913760A (en) * 1929-10-07 1933-06-13 Edward E Johnson Inc Machine for making well screens from metallic tubes
US3260097A (en) * 1963-04-08 1966-07-12 Harvey Aluminum Inc Apparatus for expanding tubular members
DE3200755C2 (de) * 1982-01-13 1985-11-28 Helmut 2420 Eutin Krueger-Beuster Verfahren zum spanlosen Herstellen eines Innengewindes
CH665152A5 (de) * 1985-01-10 1988-04-29 Urs Kellner Verfahren zum herstellen eines konischen aussengewindes.
DE3514485A1 (de) * 1985-04-22 1986-10-23 Heinz 4000 Düsseldorf Regenhardt Verfahren und vorrichtung zur herstellung von schlitzbruecken-filterrohren

Also Published As

Publication number Publication date
EP0613410A1 (fr) 1994-09-07
WO1993009896A1 (fr) 1993-05-27
DE4226084A1 (de) 1994-02-10
DE59206197D1 (de) 1996-06-05
ATE137426T1 (de) 1996-05-15

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