DE249170C

DE249170C -

Info

Publication number: DE249170C
Application number: DE1906249170D
Authority: DE
Filing date: 1906-10-09
Anticipated expiration: 1926-10-10

Description

.KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- JVl 249170 -KLASSE Ag. GRUPPE - JVl 249170 - CLASS Ag. GROUP

Patentiert im Deutschen Reiche vom 10. Oktober 1906 ab. Patented in the German Empire on October 10, 1906 .

Gegenstand der Erfindung ist eine Vorrichtung, welche bezweckt, aus Metallgegenständen, die ein geeignetes Wärmeleitungsvermögen haben, Teile abzuschneiden.
Dieses Abschneiden ist an sich bekannt und besteht darin, daß man ein sauerstoffreiches Knallgas oder reinen Sauerstoff in feinem Strahl und unter geeignetem Druck auf die Schnittstelle leitet, wobei alsdannThe subject of the invention is a device which aims to cut off parts from metal objects which have a suitable thermal conductivity.
This cutting off is known per se and consists in directing an oxygen-rich oxyhydrogen gas or pure oxygen in a fine jet and under suitable pressure onto the interface, in which case then

ίο das Metall oxydiert und das Oxyd weggeblasen wird.ίο the metal oxidizes and the oxide is blown away will.

Bei den bisherigen Vorrichtungen hat man zu dem gedachten Zweck der Schnittstelle zuerst eine Anwärmflamme und dann einen unter höherem Druck stehenden Sauerstoffstrahl zugeführt. Diese Operationen deckten sich bei den bisherigen Vorrichtungen, weder räumlich noch zeitlich derart, daß der betreffenden Stelle zuerst die Brenngassauerstoffflamme und dann durch Verschieben dieser der Sauerstoffstrahl allein zugeführt wurde.In previous devices, the interface was used for the intended purpose first a warming flame and then a high pressure oxygen jet fed. These operations were the same with the previous devices, neither spatially or temporally such that the relevant point is first the fuel gas oxygen flame and then by moving this the oxygen jet alone is supplied became.

Dieser räumlichen und zeitlichen Trennung der beiden Operationen liegt die irrtümliche Auffassung zugrunde, daß die Wärmeflamme die ihr zugedachte Rolle während des Durchschneidens auch wirklich ausfüllt. Dies ist jedoch nicht ohne weiteres der Fall, denn die Erwärmungszeit, besonders wenn es sich um starke Stücke handelt, ist bei der relativ großen Schnittgeschwindigkeit auch nicht annähernd ausreichend, um das volle Material, besonders bei starken Stücken, auf die Verbrennungstemperatur vorzuwärmen. Bei diesem Verfahren bewirkt in erster Linie die gleichmäßig fort-40 This spatial and temporal separation of the two operations is based on the erroneous view that the heat flame actually fulfills its intended role during the cutting through. However, this is not the case without further ado, because the heating time, especially when it comes to thick pieces, is not nearly sufficient at the relatively high cutting speed to preheat the full material, especially thick pieces, to the combustion temperature. In this process, the primary effect is the uniformly continued 40

schreitende Verbrennung an der Schnittstelle die erforderliche Vorwärmung des frischen Materials, und die Heizflamme kommt erst in zweiter Linie in Betracht, einmal, um den Schnitt überhaupt beginnen zu können, d. h. um die Anfangsstelle genügend vorzuwärmen, und das andere Mal, um bei kaltgeblasener Schnittstelle die Operation wieder einsetzen zu können, d. h. die letzte Schnittstelle durch Rückwärtsverschieben der Heizflamme wieder schnell anzuwärmen. Es liegt somit bei dieser Vorrichtung die Möglichkeit des Kaltblasens sehr nahe.progressive burn at the interface the necessary preheating of the fresh material, and the heating flame only comes in Secondly, once in order to be able to start the cut at all, d. H. to preheat the starting point sufficiently, and the other time to cold-blown Interface to be able to use the operation again, d. H. the last interface through Move the heating flame backwards to warm it up again quickly. It is up to this one Device very close to the possibility of cold blowing.

Durch die nach der Erfindung gebaute Vorrichtung wird dieser Mißstand insofern vermieden, als bei ihr die Zufuhr der Brennstoffflamme und des Sauerstoffstrahles räumlich und zeitlich zusammenfallen. Die Wärmeflamme braucht hier nicht das volle Material, sondern jeweils nur die scharfe unterschnittene Kante der Schnittstelle auf Verbrennungstemperatur, zu halten und man kann dadurch verhindern, daß der Säuerst off strahl kalt bläst, bzw. daß der Schnitt unterbrochen wird.The device built according to the invention avoids this disadvantage, than with her the supply of the fuel flame and the oxygen jet coincide spatially and temporally. The warming flame does not need the full material here, only the sharp undercut Keep the edge of the interface at combustion temperature, and you can thereby prevent the acid from blowing cold or interrupting the cut.

Um nun mit ein und demselben Brenner beliebige Materialstärken genügend anzuwärmen, ist es erforderlich, die Heizgasmenge verändern und die Mundstück weite der jeweiligen Gasmenge anpassen zu können. Es sind nun bereits Schneidbrenner bekannt geworden, bei denen durch Verschieben der Sauerstoff düse die ringförmige Austrittsöffnung für das Brenngas zur Erzeugung der Heizflamme nach Erfordernis eingestellt werden kann; hierbei ist die Außen wandung der zen-In order to heat up any material thickness sufficiently with one and the same burner, it is necessary to change the amount of heating gas and the width of the mouthpiece To be able to adjust the amount of gas. Cutting torches have already become known where by moving the oxygen nozzle the annular outlet opening for the fuel gas for generating the heating flame can be set as required can; here the outer wall of the central

(2. Außage, ausgegeben am 7. Mai igi4J (2nd statement, issued on May 7th igi4J

Claims

central oxygen nozzle designed conically and in the correspondingly conical mouth the fuel gas nozzle adjustable.

The embodiment forming the subject of the invention differs from these burners in that the cone of the inner surface at the end of the outer feed pipe for the fuel gas is smaller than a right angle and different from that of the outer surface

ίο at the end of the inner feed pipe for the Oxygen and the inner oxygen nozzle in front of the heating gas nozzle always protrudes.

These two essential features of the invention, namely that the two nozzles have different conicity, and also that the oxygen nozzle is always in front of the Heizgasdüse protrudes, do not have the mentioned older burners.

Both measures have the purpose of getting as close as possible to the exit of the oxygen jet to be laid on the workpiece. It becomes this • through the forming the subject of the invention Device achieved as follows:

It is known that every gas oxygen flame has a hottest point, a so-called Has cone of heat. This can be removed or depending on the shape of the outlet opening lie close to the mouthpiece. In order to avoid the cone of heat in the present case To get close to the mouthpiece, the inner cone of the outer nozzle is more blunt than the outer cone of the inner one Jet; a short cone of heat is thus formed.

Inside each heat cone is a zone of unburned gas. Now stands in this zone according to the invention, the inner oxygen nozzle before the outer nozzle. If you approach Now the burner of the work piece up to the tip of the heat cone, it is clear that through these two measures, the short shaping of the heat cone and the advancement of the oxygen nozzle in front of the heating gas nozzle, the oxygen is discharged in the immediate vicinity of the workpiece. This has regarding the Heating flame has the advantage that you actually use the hottest part of the flame, so with a relatively small flame, d. H. the cheapest amount of gas, and with regard to of oxygen that the lowest pressure at the smallest outlet opening or the smallest amount of oxygen required to oxidize and blow away the metal, is expended.

These measures are essential for a cheap operation.

In the drawing, the device is shown in Fig. 1 in vertical section and in Fig. 2 in section along the line from FIG.

Through the tube 1 the outermost burner tube 2 is a fuel gas-oxygen mixture, which serves as a heating flame, supplied while through the pipe 3 oxygen under regulated Pressure flows in. The tube 3 runs out into an interchangeable nozzle 4, which is also interchangeable with wings 5 Nozzle 6 is guided centrally. The sliding tube 3 is at the point of insertion sealed by a stuffing box 7 to the outside.

Before working with the device, the tube 3 is displaced in the tube 2 or 6 in such a way that the tip of nozzle 4 protrudes more or less from nozzle 6. As already noted above, this not only ensures that the oxygen jet exits as close to the workpiece as possible, but it also becomes the annular outlet opening for the fuel gas-oxygen mixture more or less throttled and in this way the exit speed of the heating mixture regulated in such a way that it remains greater than the respective ignition speed and that the flame does not flash back is possible.

With the help of such a device you can metal pieces of any thickness with only about Cut a 2 mm wide cutting path without worrying about interrupting the work to have to.

So that the heating flame always hits the sharpest possible edge and thus preheats sufficiently, it is advisable not to keep the flame at right angles, sondei «. in a blunt Blowing angles to the material plane against the cutting edge.

Pa ten τ-An saying:

Device for cutting through metal bodies with the help of one of two concentrically displaceable against each other, each intended for heating gas and oxygen jet Nozzles existing burner, characterized in that the cone of the inner surface at the end of the outer feed pipe is smaller than a right angle and different from that of the outer surface at the end of the inner feed pipe and the inner oxygen nozzle always protrudes in front of the hot gas nozzle.

1 sheet of drawings.