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 pressingInfo
- 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
Links
Classifications
-
- 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
-
- 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
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
Landscapes
- 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)
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)
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 |
-
1938
- 1938-07-20 DE DES133070D patent/DE749800C/en not_active Expired
Cited By (4)
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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