EP0516222A2 - Panneau adaptateur avec dispositives de formage à outil oscillant pour une presse axiale - Google Patents

Panneau adaptateur avec dispositives de formage à outil oscillant pour une presse axiale Download PDF

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Publication number
EP0516222A2
EP0516222A2 EP92201449A EP92201449A EP0516222A2 EP 0516222 A2 EP0516222 A2 EP 0516222A2 EP 92201449 A EP92201449 A EP 92201449A EP 92201449 A EP92201449 A EP 92201449A EP 0516222 A2 EP0516222 A2 EP 0516222A2
Authority
EP
European Patent Office
Prior art keywords
wobble
adapter plate
axial
pressing
axial press
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.)
Granted
Application number
EP92201449A
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German (de)
English (en)
Other versions
EP0516222B1 (fr
EP0516222A3 (en
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.)
Metallwerk Plansee GmbH
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Metallwerk Plansee GmbH
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Filing date
Publication date
Application filed by Metallwerk Plansee GmbH filed Critical Metallwerk Plansee GmbH
Publication of EP0516222A2 publication Critical patent/EP0516222A2/fr
Publication of EP0516222A3 publication Critical patent/EP0516222A3/de
Application granted granted Critical
Publication of EP0516222B1 publication Critical patent/EP0516222B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0005—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for briquetting presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02—Compacting only
    • B22F3/03—Press-moulding apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/027—Particular press methods or systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/06—Platens or press rams
    • B30B15/068—Drive connections, e.g. pivotal

Definitions

  • the invention relates to an adapter plate for a conventional axial press.
  • Such axial presses are known to have a press stand and a tool frame which is incorporated therein and is divided into a lower and an upper tool part in accordance with the press stroke direction.
  • Axial presses are e.g. B. known as mechanical or hydraulic die presses.
  • the press tool or the press frame also called adapter in technical jargon, is introduced into the press stand by means of special holding devices. It consists of lateral guide columns, placed on the upper and lower tool plates and in which the component groups of the press tool and the molded part matrices are installed and movably guided.
  • Axial presses are used for forging and material forming of molten molded parts, but also for pressing and calibrating molded parts made of metallic or ceramic powders.
  • wobble pressing Another known pressing method is the wobble pressing, which was previously mainly used for the post-processing of molded parts made by melt metallurgy, but also for powder pressing. With this technique, an improvement in the mechanical properties of the material can be achieved through higher compression in sintered molded parts.
  • the wobble pressing is always a supplement to the axial pressing of powder. However, this requires additional high investments, extends the production chain and thus increases the cost of the sintered product significantly, often to an unacceptable degree.
  • the essence of this method lies in the fact that it is not a large area, but rather a dynamic or pulsating, approximately linear pressing and compacting of powder materials or workpieces by means of a so-called wobble head which works as a press ram.
  • the wobble head preferably has a cone-shaped, resting on the material to be pressed with the pressing surface close to 180 o ranging cone angle.
  • designs have proven useful in which a surface area of the swash head opposite the pressing surface is spherical and is slidably arranged in a shaft with a spherical shell-shaped recess.
  • a cylindrical extension adjoins the spherical surface of the wobble head is closed by an eccentric bush in its end section.
  • This device is used to generate the wobble movement.
  • a swash head designed as a gyroscope performs a precision movement about a precision axis that corresponds to the main axis of the axial press. Because of the line contact with the material to be pressed, it always transmits only a locally acting, axial pressing pressure to the workpiece in time with the angular frequency of the wobbling process. In relation to the powder press application, this means that the powder grains flow in the pressed material, where the aforementioned blockages have already occurred during axial pressing.
  • the wobble pressing is carried out in specially developed single-purpose presses.
  • the wobble movement of the wobble head is usually generated by mechanically driven machine elements.
  • the workpiece is preferably fed to the wobble head by means of a hydraulic punch located in a lower press part.
  • Examples of such drive units are DE 20 33 107, EP 0 014 575, EP-A2 0 369 789 and EP 0 383 578.
  • As an alternative to the mechanical devices for generating the wobble movement it has already been proposed in DE-OS 25 32 067 to generate the wobble movement by means of three or four pressure cylinders attached to the circumference of the die holder and operating with a corresponding phase shift.
  • the wobble device and drive units are located inside the press. Such statements have so far not been used in practice.
  • the object of the present invention is the combination of axial pressing and wobble pressing or wobble forging in a single commercially available axial press.
  • the task in detail consists in expanding a commercially available or an existing axial press with the function of the wobble pressing with economically and technically justifiable effort.
  • the extension is economical where, in a manufacturing company, depending on the requirements of the workpiece, it is possible to carry out both pressing processes alternatively or in succession at low cost. So far, z. For example, the price calculation offered for sintered bulk parts does not usually involve this effort, ie the installation of separate axial and wobble presses, even where the technical advantage was recognized.
  • the extension makes technical sense if a quick conversion from one to the other press function is possible with an acceptable, that is to say the smallest possible technical outlay.
  • the object of the present invention is achieved by means of an adapter plate for an axial press according to claim 1 of the present invention.
  • adapter plate means that this is an additional device for a standard press or for a standard tool frame to fulfill an additional function.
  • An adapter generally meets its definition if it can be inserted into the standard device with comparatively little time and technical technical effort. This applies to the adapter plate according to the present invention with the technical features mentioned in claim 1.
  • the adapter plate is preferably used in the guide columns of the tool frame of the axial press and mechanically connected to individual assemblies of the axial pressing tool.
  • the adapter plate can be inserted either in the upper or in the lower tool part.
  • the devices and construction parts of the adapter plate are designed for the smallest possible height in the axial or pressing direction.
  • the technical design of the wobble head in the adapter plate which is intended for installation in an existing axial press, therefore has its own design features compared to conventional designs of wobble presses. Techniques previously used to generate the wobble movement can at best be transferred to the present invention with restrictions.
  • the adapter plate according to the invention in addition to the wobble head, there is only the device for generating the wobble movement itself.
  • the drive power for the wobble movement is transmitted to the wobble head by a drive unit located outside the axial press or the tool frame. The drive unit can therefore be set up completely separate from the axial press with adapter plate.
  • the transmission devices for the drive power are also space-saving components. Only then is it ensured that they can be inserted into the existing axial press or tool frame and connected to the adapter plate coupling.
  • the adapter plate according to the invention In wobble pressing, it is known to superimpose an axial movement on the wobble movement of the wobble head. With appropriate control, the adapter plate according to the invention fully supports the main press movement of the upper or lower ram of the axial press or the movement of the upper tool part.
  • the wobble pressing therefore does not necessarily take place with a constant height adjustment of the wobble head, as is customary in the wobble presses available on the market.
  • There the axial height change of the material to be pressed takes place via the lower part of the tool.
  • the swash head sits there in the height-adjustable tool upper part.
  • the adapter plate also allows the press ram of the wobble head to be used for axial pressing.
  • the wobble head is brought into its rest position, ie in a position where its axis of rotation coincides with the main axis of the press, and locked there.
  • the previously unused technology for generating the wobble movement of a wobble head by means of hydraulic pressure cylinders and stamps offers particular advantages.
  • the press rams of such pressure cylinders can either start in the axial direction on an annular surface of the wobble head which is diametrically opposite the work surface, or alternatively can start in a star shape in a plane perpendicular to the press axis in a plane perpendicular to the press axis. It has proven to be advantageous to use at least 6 hydraulic pressure cylinders, which are arranged at equal intervals around the wobble axis and are phase-shifted with the wobble frequency, to generate the wobble movement.
  • the pressure medium for transferring the drive power can be fed quickly and space-savingly from a hydraulic pump located outside the axial press to the wobble head using flexible pressure hoses with known coupling devices.
  • Axial and radial pumps in which individual pressure cylinders are actuated either axially via a swash plate or in a star-shaped, radial arrangement via cams by a central mechanical drive unit, have been proven to be exactly out of phase with one another as the drive unit.
  • the adapter plate according to the present invention is advantageously used wherever pressing has previously been done solely by means of axial pressing and where the geometric and mechanical quality of molded parts can be improved and / or a high quality standard that can be achieved by other methods can be achieved more economically. Accordingly, preferred areas of application are the forging, deep-drawing of molded parts, in particular steel parts, using primary material produced by melt metallurgy.
  • the adapter plate according to the invention can also be used advantageously for the pressing of metallic and ceramic powders and / or for the calibration of metallic sintered molded parts.
  • an adapter plate according to the invention installed in an axial press, can be used both for wobble pressing, in the locked rest position of the wobble head, and also for axial pressing.
  • An axially pre-pressed powder can be compacted considerably higher by means of subsequent wobble pressing. Higher green compact densities than by axial pressing can also be achieved by tumbling powders alone. Higher green compact densities result in improved material properties for the compact during the subsequent sintering, in particular higher strengths. These property improvements cannot be achieved by changing parameters when sintering less dense compacts. Even after long-term sintering, a large number of materials show no increase in density, or no increase in density that significantly exceeds the density achieved during pressing, but only undesired grain growth. The degree of residual porosity in the finished sintered body determines its mechanical properties. Any small reduction in the residual porosity of a material in the range of 90% to 100% theoretical density generally increases the mechanical properties of a material significantly.
  • sintered metallurgically produced molded parts are inexpensive to manufacture in comparison to those produced using other technologies, in particular by means of melt metallurgy and mechanical shaping processes.
  • FIG. 1 shows schematically the section through the adapter plate according to the invention in a preferred embodiment.
  • the adapter plate is built into the tool frame of a conventional axial press and forms a functional unit with components of the axial press.
  • the upper tool part of the existing axial press is represented by the tool table -12- of the tool frame, to which the adapter plate -6- is fastened by means of flange connections by means of screws -9-.
  • the adapter plate is the lower tool part of the axial press, as it is still used for both axial pressing and wobble pressing.
  • the lower tool part has a die plate -2-, into which a specific molding die -3- is inserted and into which a press ram -1- acts from below.
  • the workpiece -4- to be machined is shown in the press die.
  • the upper and lower tool parts of the axial press are connected to each other by means of guide columns -11- and adjusted to each other.
  • the upper tool part moves towards the lower tool part along these columns during the axial pressing process.
  • the adapter plate -6- is moved along the guide columns together with the upper tool part to the lower tool part.
  • the adapter plate is adjusted within the tool frame in such a way that it coincides exactly with the main axis of the axial press.
  • the main part of the adapter plate is the wobble head -5-. According to a previously known embodiment, it has a spherical head part and is slidably mounted in a spherical shell-shaped recess in the shaft of the adapter plate. A mechanically anchored, separate ram -10- is embedded in the swash head. The coming with the material to be pressed into contact with the pressing surface of the punch itself is not flat but has the form of a conical shell with close to 180 o-reaching cone angle.
  • a large number of pressure cylinders -8- with pressure rams -7- belong to the devices for generating the wobble movement.
  • the pressure cylinders are embedded in the shaft of the adapter plate in such a way that the pressure stamps end on an annular surface of the wobble head and produce the wobble movement of the wobble head as a result of the phase-shifted stroke movement. 8 - 12 pressure cylinders evenly arranged on a circle have proven their worth for practical designs.
  • the transmission devices here oil pressure lines
  • the transmission devices are not shown in FIG. 1, via which the drive power is transmitted from a drive unit located outside the tool frame and outside the press, here a specific pump unit. Accordingly, the representation of the coupling elements has been omitted.
  • a large number of quick-release coupling devices for oil pressure lines are known to the person skilled in the art.
  • the adapter plate is moved together with the upper tool part according to the upper arrow to the lower tool part with the workpiece to be machined.
  • an axial movement must be superimposed on the wobble movement during the wobble pressing.
  • the additional axial movement can be achieved either by lifting the lower ram or by further lowering the entire upper tool part, including the adapter plate.
  • an adapter plate according to the invention shown in the figure was successfully used both for forging molded parts of blanks and rings made by melt metallurgy, and for pressing or post-compressing mass-produced molded parts made by powder metallurgy.
  • the advantages of the invention were particularly evident where the production of very different products in only limited numbers required great flexibility with regard to pressing processes and tool changes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Press Drives And Press Lines (AREA)
  • Adornments (AREA)
  • Automatic Assembly (AREA)
  • Forging (AREA)
EP92201449A 1991-05-27 1992-05-21 Panneau adaptateur avec dispositives de formage à outil oscillant pour une presse axiale Expired - Lifetime EP0516222B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117250 1991-05-27
DE4117250A DE4117250A1 (de) 1991-05-27 1991-05-27 Adapterplatte mit vorrichtungen zum taumelpressen fuer eine axialpresse

Publications (3)

Publication Number Publication Date
EP0516222A2 true EP0516222A2 (fr) 1992-12-02
EP0516222A3 EP0516222A3 (en) 1993-03-31
EP0516222B1 EP0516222B1 (fr) 1994-08-10

Family

ID=6432512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92201449A Expired - Lifetime EP0516222B1 (fr) 1991-05-27 1992-05-21 Panneau adaptateur avec dispositives de formage à outil oscillant pour une presse axiale

Country Status (4)

Country Link
EP (1) EP0516222B1 (fr)
AT (1) ATE109724T1 (fr)
DE (2) DE4117250A1 (fr)
ES (1) ES2059188T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607024A1 (de) * 1996-02-24 1997-08-28 Fag Automobiltechnik Ag Verfahren zum Befestigen eines Wälzlagerringes
DE19753949A1 (de) * 1997-12-05 1999-09-02 Doege Flexible Umformpresse mit steuerbarer nichtlinearer Stößelbewegung
FR3019085A1 (fr) * 2014-03-25 2015-10-02 Danieli Henschel Presse et procede de compression a angle de compression variable

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10017462C2 (de) * 2000-04-07 2003-06-18 Fraunhofer Ges Forschung Taumelpresse
DE102011001672B4 (de) 2011-03-30 2013-09-05 Langenstein & Schemann Gmbh Vorrichtung zum Umformen von Werkstücken
DE102011002066B4 (de) 2011-04-14 2016-02-04 Langenstein & Schemann Gmbh Taumellager für eine Vorrichtung zum Taumeln von Werkstücken

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2532067A1 (de) * 1974-07-29 1976-02-12 Os Bad Rozwojowy Obrobki Plast Triebwerk eines presswerkzeuges zur verformung von erzeugnissen nach dem taumelgesenkverfahren
EP0238186A2 (fr) * 1986-02-14 1987-09-23 Btg International Limited Matriçage par mouvement oscillant d'une poudre métallique
EP0381089A2 (fr) * 1989-02-02 1990-08-08 Maschinenfabrik Lauffer GmbH & Co. KG Presse hydraulique
EP0383578A2 (fr) * 1989-02-14 1990-08-22 Brother Kogyo Kabushiki Kaisha Presse à outil de formage oscillant pour le façonnage plastique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1652653B1 (de) * 1967-01-20 1972-05-31 Politechnika Warszawska Walzgesenkpresse
GB1224260A (en) * 1969-07-03 1971-03-10 Massey Ltd B & S Improvements in upsetting or forging machines
ZA80493B (en) * 1979-02-08 1981-01-28 Bendix Westinghouse Ltd Trailer or semi-trailer vehicle braking apparatus
DE3130923C2 (de) * 1981-08-05 1987-03-05 Kievskij politechničeskij institut imeni 50-letija Velikoj Oktjabrskoj Socialističeskoj Revoljucii, Kiew/Kiev Taumel-Gesenkpresse zur Herstellung von Werkstücken mit langgestrecktem Schaft
JPH02137637A (ja) * 1988-11-18 1990-05-25 Brother Ind Ltd 塑性加工方法及びその装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2532067A1 (de) * 1974-07-29 1976-02-12 Os Bad Rozwojowy Obrobki Plast Triebwerk eines presswerkzeuges zur verformung von erzeugnissen nach dem taumelgesenkverfahren
EP0238186A2 (fr) * 1986-02-14 1987-09-23 Btg International Limited Matriçage par mouvement oscillant d'une poudre métallique
EP0381089A2 (fr) * 1989-02-02 1990-08-08 Maschinenfabrik Lauffer GmbH & Co. KG Presse hydraulique
EP0383578A2 (fr) * 1989-02-14 1990-08-22 Brother Kogyo Kabushiki Kaisha Presse à outil de formage oscillant pour le façonnage plastique

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607024A1 (de) * 1996-02-24 1997-08-28 Fag Automobiltechnik Ag Verfahren zum Befestigen eines Wälzlagerringes
DE19607024C2 (de) * 1996-02-24 1998-08-20 Fag Automobiltechnik Ag Verfahren zum Befestigen eines Wälzlagerringes
US5911459A (en) * 1996-02-24 1999-06-15 Fag Automobiltechnik Ag Method of installing an antifriction bearing ring in a housing
DE19753949A1 (de) * 1997-12-05 1999-09-02 Doege Flexible Umformpresse mit steuerbarer nichtlinearer Stößelbewegung
DE19753949C2 (de) * 1997-12-05 1999-12-02 Doege Eckart Flexible Umformpresse mit steuerbarer nichtlinearer Stößelbewegung
FR3019085A1 (fr) * 2014-03-25 2015-10-02 Danieli Henschel Presse et procede de compression a angle de compression variable

Also Published As

Publication number Publication date
ES2059188T3 (es) 1994-11-01
EP0516222B1 (fr) 1994-08-10
DE59200356D1 (de) 1994-09-15
ATE109724T1 (de) 1994-08-15
DE4117250A1 (de) 1992-12-03
DE4117250C2 (fr) 1993-06-09
EP0516222A3 (en) 1993-03-31

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