DE449529C - Process for the production of hollow bodies by pressing, forging or the like. - Google Patents

Process for the production of hollow bodies by pressing, forging or the like.

Info

Publication number
DE449529C
DE449529C DEB127913D DEB0127913D DE449529C DE 449529 C DE449529 C DE 449529C DE B127913 D DEB127913 D DE B127913D DE B0127913 D DEB0127913 D DE B0127913D DE 449529 C DE449529 C DE 449529C
Authority
DE
Germany
Prior art keywords
pressing
core
forging
hollow bodies
melting point
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
DEB127913D
Other languages
German (de)
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.)
Individual
Original Assignee
Individual
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 by Individual filed Critical Individual
Priority to DEB127913D priority Critical patent/DE449529C/en
Application granted granted Critical
Publication of DE449529C publication Critical patent/DE449529C/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00Bending tubes using mandrels or the like
    • B21D9/16Auxiliary equipment, e.g. machines for filling tubes with sand
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00Corrugating tubes
    • B21D15/04Corrugating tubes transversely, e.g. helically
    • B21D15/10Corrugating tubes transversely, e.g. helically by applying fluid pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Forging (AREA)

Description

Verfahren zur Herstellung von Hohlkörpern durch Pressen, Schmieden o. dgl. Es ist bekannt, Hohlkörper beliebiger Form-und Querschnittsänderung durch Pressen, Schmieden o. dgl. aus Schmiedeeisen oder Stahl herzustellen, indem in einen hohlen Ausgangskörper, der beispielsweise durch ein Rohr runden oder eckigen Querschnittes gebildet wird, Formeinlagen eingebracht werden, die für den von außen auf den Hohlkörper einwirkendem PreBstempel äne Gegenform. bilden. Nach dem Preßyorgang ist es natürlich schwierig, die Formeinlagen. wieder aus dem umgebildeten Hohlkörper zu entfernen, insbesondere, wenn sie wieder verwendet werden sollen. Dieserhalb hat man die Formeinlagen aus einzelnen unzerstörbaren Teilern gebildet, deren Zusammenhang jedoch durch Temperatur- oder chemische Einflüsse zerstört wird, wobei also :ein Teil des Werkstoffes der Formeinlage verlorengeht. Aber- auch die Beseitigung der einzelnen Stücke der Formeinlagen aus dem fertiggepreßten Hohlkörper ist mühevoll und hängt wesentlich von der Geschicklichkeit .des betreffenden Arbeiters ab; das. Verfahren ist daher zeitraubend, teuer und unwirtschaftlich und gestattet naturgemäß nur die Herstellung von Hohlkörpern eckiger Querschnittsform ohne Querschnittsverkleinerung.Process for the production of hollow bodies by pressing, forging o. The like. It is known to use hollow bodies of any shape and cross-sectional change Pressing, forging o. The like. Manufacture of wrought iron or steel by in a hollow starting body, for example by a tube of round or angular cross-section is formed, mold inserts are introduced, which for the outside of the hollow body acting punch and counter-form. form. After the press session it is natural difficult to get the molded inserts. to be removed again from the reshaped hollow body, especially if they are to be used again. This is why you have the molded inserts the end individual indestructible dividers, but their relationship is determined by temperature or chemical influences are destroyed, thus: a part of the material of the Mold insert is lost. But also the removal of the individual pieces of the mold inserts from the finished pressed hollow body is laborious and depends largely on the skill .of the worker concerned; The process is therefore time consuming, expensive and uneconomical and, of course, only allows the production of hollow bodies more angular Cross-sectional shape without reducing the cross-section.

Die vorliegende Erfindung vermeidet diese -Nachteile, indem sie Formeinlagen aus einem Sondermetall verwendet, das: für die Dauer des Preßvorganges standhält, aber hernach unter geringer Wärmeerhöhung ohne jedweden Materialverlust ausgeschmolzen werden kann, wodurch es möglich ist, auch HohlköiTer runden Querschnittes mit Querschnittsverkleinerungen, wie Kugelstabrohre o. dgl., bilden zu können. Um an Werkstoff der verlorenen Kernform zu sparen, wird weiterhin nach der Erfindung der Kern um einen festen Dorn von verhältnismäßig hohem Schmelzpunkt gebildet, der nach .dem Ausschmelzen des Kernes frei aus dem fertiggepreßfien Hohlkörper herausgezogen werden kann.The present invention avoids these disadvantages by providing molded inserts made of a special metal that: withstands the duration of the pressing process, but afterwards melted out with a slight increase in heat without any loss of material can be, whereby it is possible to also use hollow grains of round cross-section with cross-sectional reductions, like ball bar tubes o. The like. To be able to form. To get to the material of the lost core form To save, the core continues to be a solid mandrel of proportionately according to the invention high melting point, which after .dem melted out of the core free from the Ready-pressed hollow body can be pulled out.

In der Zeichnung ist das Verfahren in Abb. 1, 2 und 3 bei einem runden Kugelstabrohr im Längsschnitt .dargestellt, während Abb.4 und 5 im Längs- und Querschnitt die Ausbildung eines im Querschnitt viereckigen Rohres mit unebenen Flächen zeigt.In the drawing, the procedure in Fig. 1, 2 and 3 is at a round Ball bar tube in longitudinal section, while Figures 4 and 5 in longitudinal and cross-section shows the formation of a square tube in cross section with uneven surfaces.

Gemäß Abb. i und 2 wird das Kugelstabrobr -durch Pressen oder Schmieden eines zylindrischen Rohres i gebildet, nachdem in dasselbe ein der zu erzielenden Form entsprechend geformter Kern 2 aus einer Metalllegierung eingeführt ist, der dem nur wenige Sekunden dauernden Preß- oder Schmiededruck widersteht, wobei das zylindrische Rohr in die punktiert gezeichnete, sich dem Kern anschmiegende Form 3 gelangt und nach Ausschmelzen des Kernes, was bei nur geringer Temperaturerhöhung erfolgt, gebrauchsfertig ist.According to Fig. 1 and 2, the ball bar is made by pressing or forging a cylindrical tube i formed after one of the to be achieved in the same Form correspondingly shaped core 2 made of a metal alloy is introduced, the withstands the pressing or forging pressure, which lasts only a few seconds, with the cylindrical tube in the dotted shape that hugs the core 3 arrives and after melting out the core, which with only a slight increase in temperature is done, is ready for use.

Um an Werkstoff der verlorenen Kernform 2 zu sparen, wird nach Abb. 3 der eigentliche Kern 2 um einen unveränderlichen Dorn 4 gebildet, der nach dem Pressen des Rohres beim Ausschmelzen des Kernes 2 aus dem fertiggepreßten Rohr 3 herausgezogen und wieder benutzt werden kann.In order to save on the material of the lost core form 2, according to Fig. 3 the actual core 2 is formed around an invariable mandrel 4, which after the Pressing the pipe when the core 2 is melted out of the finished pressed pipe 3 can be pulled out and used again.

Bei den Abb.4 und 5 handelt es sich um die Herstellung eines Hohlkörpers von viereckigem Querschnitt, dessen Wandungen uneben sind. Der Preßvorgang erfolgt sinngemäß in gleicher Weise wie bei dem Beispiel nach Abb. 1, 2 und 3, wie auch ein Hohlkörper beliebiger Körperform- und Querschnittsänderung auf diese Weise gebildet werden kann.Figures 4 and 5 show the manufacture of a hollow body of square cross-section, the walls of which are uneven. The pressing process takes place in the same way as in the example according to Fig. 1, 2 and 3, as well as a hollow body of any body shape and cross-sectional change formed in this way can be.

Claims (2)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Hohlkörpern beliebiger Form- und Querschnittsänderung durch Pressen, Schmieden o. dgl., insbesondere aus Schmiedeeisen oder Stahl unter Verwendung von Formeinlagen (Kernen), deren Form unter Einwirkung von Wärme zerstört wird, dadurch gekennzeichnet, daß der Kern aus einer Metallegierung gebildet wird, deren Schmelzpunkt unter dem Schmelzpunkt des zu verformenden Hohlkörpers liegt und die für die Dauer des Arbeitsvorganges druckfest bleibt und hernach ohne Materialverlust ausgeschmolzen wird. PATENT CLAIMS: i. Process for the production of hollow bodies of any Change in shape and cross-section by pressing, forging or the like, in particular from Wrought iron or steel using molded inserts (cores), their shape is destroyed under the action of heat, characterized in that the core is made of a metal alloy is formed, the melting point of which is below the melting point of the to be deformed hollow body and is pressure-resistant for the duration of the operation remains and is then melted out without any loss of material. 2. Verfahren zur Herstellung von Hohlkörpern nach Anspruch i, dadurch gekennzeichnet, daß der Kern aus zwei -Metallteilen besteht, dessen innerer, aus dem fertiggeformten Hohlkörper herausziehbarer Teil (Dorn 4) aus einem Metall von verhältnismäßig hohem Schmelzpunkt gebildet ist, um welchen herum die die eigentliche Kernform ergebende Legierung liegt. 2. A method for producing hollow bodies according to claim i, characterized in that the core consists of two metal parts, the inner part (mandrel 4) which can be pulled out of the finished hollow body is formed from a metal of relatively high melting point, around which the the actual core shape resulting alloy lies.
DEB127913D 1926-10-23 1926-10-23 Process for the production of hollow bodies by pressing, forging or the like. Expired DE449529C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB127913D DE449529C (en) 1926-10-23 1926-10-23 Process for the production of hollow bodies by pressing, forging or the like.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB127913D DE449529C (en) 1926-10-23 1926-10-23 Process for the production of hollow bodies by pressing, forging or the like.

Publications (1)

Publication Number Publication Date
DE449529C true DE449529C (en) 1927-09-20

Family

ID=6997014

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB127913D Expired DE449529C (en) 1926-10-23 1926-10-23 Process for the production of hollow bodies by pressing, forging or the like.

Country Status (1)

Country Link
DE (1) DE449529C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971470C (en) * 1948-10-02 1959-02-05 Steinmueller Gmbh L & C Process for the production of round end closures on square chambers welded together from channel-shaped longitudinal halves

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971470C (en) * 1948-10-02 1959-02-05 Steinmueller Gmbh L & C Process for the production of round end closures on square chambers welded together from channel-shaped longitudinal halves

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