DE749800C - Process for the production of compact metal bodies from metal powders by pressing - Google Patents

Process for the production of compact metal bodies from metal powders by pressing

Info

Publication number
DE749800C
DE749800C DES133070D DES0133070D DE749800C DE 749800 C DE749800 C DE 749800C DE S133070 D DES133070 D DE S133070D DE S0133070 D DES0133070 D DE S0133070D DE 749800 C DE749800 C DE 749800C
Authority
DE
Germany
Prior art keywords
pressing
sound
pressure
stamp
powders
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
DES133070D
Other languages
German (de)
Inventor
Dr Franz Skaupy
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 filed Critical
Priority to DES133070D priority Critical patent/DE749800C/en
Application granted granted Critical
Publication of DE749800C publication Critical patent/DE749800C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02Compacting only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12Both compacting and sintering
    • B22F3/14Both compacting and sintering simultaneously

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)

Description

Verfahren zur Herstellung kompakter Metallkörper aus Metallpulvern durch Pressen Gegenstand der Erfindung ist ein Verfahren zur Herstellung kompakter MetallkÖrper aus Metallpulvern, das darin besteht, daß. auf durch Pressen von Pulvern geformte, aber noch nicht genügend feste Metallkörper eine periodische, häufig wiederholte Druckwirkung von der Frequenz. des Schalles oder Ultraschalles ausgeübt wird, und zwar entweder noch in der Preßform oder nachdem der vorgeformte Körper bereits aus der Preßform genommen ist. Die periodische Druckwirkung wird am besten durch Einwirkung von Schall, insbesondere Ultraschall, erzeugt; dies kann dadurch geschehen, daß der Stempel der Preßform mit dem Schallerzeuger in mechanische Verbindung gebracht wird, daß der Stempel selbst aus magnetischem Werkstoff, wie Eisen oder Nickel, besteht und als Erzeuger der Schallwirkung durch Magnetostriktion dient, etwa vermöge einer über den Stempel geschobenen, wechselstromdurchflossenen Spule, oder daß der vorgeformte Körper aus der Preßform in eine Flüssigkeit gebracht wird, die der Einwirkung von Schall oder Ultraschall ausgesetzt wird, etwa durch Einbringen eines schwingenden Quarzes in die Flüssigkeit. Geschieht die Schalleinwirkung in der Preßform, ist es zweckmäßig, außerdem noch einen konstanten Druck auf den Stempel wirken zu lassen, der sich der Druckschwankung überlagert; ebenso kann auf die Flüssigkeit noch ein konstanter Druck ausgeübt werden.Process for the production of compact metal bodies from metal powders by pressing The subject of the invention is a method for making them more compact Metal body made of metal powders, which consists in that. on by pressing powders shaped, but not yet sufficiently solid metal bodies a periodic, frequently repeated one Pressure effect on the frequency. of sound or ultrasound is exerted, and although either still in the mold or after the preformed body is already out the mold is taken. The periodic pressure effect is best achieved by exposure generated by sound, especially ultrasound; this can be done in that the punch of the mold is brought into mechanical connection with the sound generator that the stamp itself is made of magnetic material, such as iron or nickel, exists and serves as a generator of the sound effect through magnetostriction, for example by virtue of it a coil through which alternating current flows, pushed over the punch, or that the preformed body is brought out of the mold into a liquid that is exposed to the action is exposed to sound or ultrasound, for example by introducing a vibrating Quartz into the liquid. If the noise occurs in the mold, is it is advisable to also let a constant pressure act on the stamp, which is superimposed on the pressure fluctuation; you can also add another to the liquid constant pressure can be applied.

Durch die periodische Druckwirkung wird der Formkörper mitunter nicht so weit verfestigt, wie nötig ist, so daß noch eine Temperaturerhöhung zu Hilfe genommen werden mufi. Diese kann vor oder nach der Beschallung stattfinden; am günstigsten ist eine gleichzeitige Wirkung von Temperaturerhöhung und Beschallung. Es ist dann möglich, schon bei niedrigen Temperaturen die gleiche Verdichtung und @"erfestigung des Körpers zu bewirken, wie sie ohne Beschallung erst bei höheren Temperaturen auftritt, was verschiedene Vorzüge ergibt, wie Ersparnis an Heizenergie, Vermeidung voll Kornvergröberung und unerwünschter Diffusion u. dgl. m. Wird der vorgeformte Körper in einer-- Flüssigkeit erhitzt, kann diese z. B. ein Schmelzbad, etwa ein Salzbad (Kvolitli u. ä.), sein. Die Beschallung bei gewöIiillicher oder wenig erhöhter Temperatur kann genügen, dem Körper solche Festigkeit zli gehen, daß eine weitere Formgebung durch Feilen, Sägen, bohren u. dgl. ermöglicht wird. worauf dann weitere Verdichtung bei höherer Temperatur mit oder ohne Beschallung erfolgt.As a result of the periodic pressure effect, the molding is sometimes not solidified as much as is necessary, so that an increase in temperature has to be used as an aid. This can take place before or after the sonication; the most favorable is a simultaneous effect of temperature increase and sonication. It is then possible to bring about the same compression and consolidation of the body even at low temperatures as occurs without sonication only at higher temperatures, which results in various advantages, such as savings in heating energy, avoidance of full grain coarsening and unwanted diffusion and the like If the preformed body is heated in a liquid, this can be, for example, a molten bath, such as a salt bath (Kvolitli etc.) Strength is such that further shaping is made possible by filing, sawing, drilling and the like, whereupon further densification takes place at a higher temperature with or without sonication.

Es ist bereits bekannt, Ultraschallwellen auf bereits fertige kompakte Körper oder auf Schmelzen einwirken zu lassen. Im vorliegenden Fall handelt es sich dagegen um die Allwendung eines Druckes von der Frequenz des Schalles oder Ultraschalles auf durch Pressen von Pulvern geformte, aber noch nicht genügend feste Metallkörper, wobei diese periodisch häufig- wiederholte Druckeinwirkung eine festere Aneinanderlagerung der Pulverteilchen bis zur Bildung eines kompakten Körpers bewirkt.It is already known to apply ultrasonic waves to already finished compacts Bodies or melts to act. In the present case it is on the other hand, it is about the general application of a pressure of the frequency of sound or ultrasound on metal bodies formed by pressing powders but not yet sufficiently strong, whereby this periodically frequently repeated pressure effect results in a more firm attachment causes the powder particles to form a compact body.

Claims (5)

PATENTANSPRÜCHE z. Verfahren zur Herstellung kompakter Metallkörper aus Metallpulvern durch Pressen, dadurch gekennzeichnet, daß auf die durch Pressen aus den Pulvern geformten Metallkörper entweder in der Preßform oder außerhalb dieser eine periodisch häufig wiederholte Druckeinwirlcum; von der Frequenz. des Schalles oder L"ltrasclialles ausgeübt wird. PATENT CLAIMS z. Process for the production of compact metal bodies from metal powders by pressing, characterized in that on the by pressing metal bodies formed from the powders either in or outside the mold a periodically frequently repeated pressure whirlcum; on the frequency. of the sound or L "ltrasclialles is exercised. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die periodische Druckeinwirkung mittels des Stempels der Preß-. form geschieht, der entweder mit dem Schallerzeuger in mechanischer Verbindung steht oder, aus Eisen oder Nickel bestehend, selbst als Erzeuger der Schällwirkung durch Magnetostriktion dient, etwa vermöge einer über den Stempel geschobenen, wechselstromdurchflossenen Spule. 2. The method according to claim i, characterized in that that the periodic application of pressure by means of the stamp of the pressing. form happens, which is either mechanically connected to the sound generator or made of iron or nickel, itself as a generator of the sounding effect through magnetostriction serves, for example by virtue of an alternating current being pushed over the stamp Kitchen sink. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß auf den Stempel außerdem noch ein konstanter Druck ausgeübt wird. .I. 3. The method according to claim 2, characterized in that on the stamp in addition, a constant pressure is exerted. .I. Verfahren nach Anspruch r, dadurch gekennzeichnet, daß der der Preßform entnommene vorgeformte Körper in einer Flüssigkeit der Einwirkung voll Schall oder Ultraschall ausgesetzt wird. Method according to claim r, characterized in that the preformed body removed from the mold in a Liquid is fully exposed to sound or ultrasound. 5. Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der gepreßte Körper vor oder nach, vorzugsweise aber während der periodischen Druckwirkung einer Temperaturerhöhung ausgesetzt wird.5. Procedure according to claim 1 to 4, characterized in that the pressed body before or after, but preferably during the periodic pressure effect of a temperature increase is exposed.
DES133070D 1938-07-20 1938-07-20 Process for the production of compact metal bodies from metal powders by pressing Expired DE749800C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES133070D DE749800C (en) 1938-07-20 1938-07-20 Process for the production of compact metal bodies from metal powders by pressing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES133070D DE749800C (en) 1938-07-20 1938-07-20 Process for the production of compact metal bodies from metal powders by pressing

Publications (1)

Publication Number Publication Date
DE749800C true DE749800C (en) 1944-12-06

Family

ID=7539290

Family Applications (1)

Application Number Title Priority Date Filing Date
DES133070D Expired DE749800C (en) 1938-07-20 1938-07-20 Process for the production of compact metal bodies from metal powders by pressing

Country Status (1)

Country Link
DE (1) DE749800C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE955210C (en) * 1950-11-04 1957-02-21 Wessel Werk A G Process for the extrusion of ceramic masses
DE970116C (en) * 1940-07-26 1958-08-21 Rudolf Kuerth Shaping process for metal powder (metal-ceramic materials) under the action of ultrasound
DE1179445B (en) * 1957-02-13 1964-10-08 Heinz Schmalz Dr Ing Process for the production of metal powder compacts, in particular those of larger dimensions
DE1285070B (en) * 1960-03-07 1968-12-12 Atomic Energy Commission Process for compacting a ceramic powder from sintered or molten uranium dioxide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE970116C (en) * 1940-07-26 1958-08-21 Rudolf Kuerth Shaping process for metal powder (metal-ceramic materials) under the action of ultrasound
DE955210C (en) * 1950-11-04 1957-02-21 Wessel Werk A G Process for the extrusion of ceramic masses
DE1179445B (en) * 1957-02-13 1964-10-08 Heinz Schmalz Dr Ing Process for the production of metal powder compacts, in particular those of larger dimensions
DE1285070B (en) * 1960-03-07 1968-12-12 Atomic Energy Commission Process for compacting a ceramic powder from sintered or molten uranium dioxide

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