DE175165C

DE175165C -

Info

Publication number: DE175165C
Application number: DENDAT175165D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Vorliegende Erfindung betrifft ein Verfahren, Röhren zu biegen, und zwar vorzugsweise solche, die einen großen Durchmesser haben. Das Verfahren besteht darin, daß man Ringteile der Röhre nacheinander erwärmt, während das Rohr bezw. der zu biegende Teil desselben unter einem beständigen, das Biegen hervorbringen sollenden Druck oder Zug sich befindet. Die gebogenenThe present invention relates to a method To bend tubes, preferably those that have a large diameter. The procedure consists in that ring parts of the tube are heated one after the other, while the tube BEZW. the part to be bent under a permanent, the bending is supposed to produce pressure or tension. The curved ones

ίο Abschnitte werden nach vorliegender Erfindung nacheinander wieder gekühlt, damit diese ihre Biegung beibehalten, ohne daß es notwendig wäre, das Rohr auszufüllen, um ein Zerreißen desselben zu vermeiden. Die Heizvorrichtung wird in einem der Biegung des Rohres entsprechenden Kreisbogen so bewegt, daß, so lange das Rohr gerade bleibt, nur ein ganz kleiner Teil desselben erwärmt wird, daß jedoch, sobald das Rohr sich biegt, die Heizvorrichtung selbsttätig nach einem bis dahin noch ungebogenen Teil des Rohres weiter bewegt wird. Durch dieses aufeinander folgende Erwärmen ringförmiger Teile des Rohres wird ein allmähliches gleichförmiges Biegen des Rohres erreicht, wobei die Biegung nach Einstellung des Apparates selbsttätig bestimmt wird.ίο Sections are made according to the present invention successively cooled again so that they retain their curvature without the need for it would be to fill the tube in order to avoid tearing it. The heater is moved in an arc corresponding to the bend of the pipe so that, as long as the pipe remains straight, only a very small part of it is heated, but that as soon as the tube bends, the Heating device automatically after a part of the pipe that has not yet been bent is moved further. By this successive heating of annular parts of the Tube, a gradual uniform bending of the tube is achieved, with the bend is determined automatically after setting the apparatus.

Zweckmäßig wird das erwähnte Verfahren mit einer Vorrichtung ausgeführt, welche aus feststehenden Klemmbacken besteht, die das eine Ende des zu biegenden Rohres festhalten. Ferner ist eine Vorrichtung vorgesehen, durch welche auf das freie Ende des Rohres beständig ein das Biegen bewirken sollender Zug ausgeübt wird, und ferner ist schwingbar ein ringförmiger Brenner vorgesehen, welcher das Rohr umgibt und welcher allmählich dem Rohr entlang bei dessen Biegung bewegt wird. An dem Brenner ist eine Vorrichtung angebracht, durch welche die Vorwärtsbewegung desselben von der Kurve, d. h. von der Biegung des Rohres abhängig gemacht wird.The mentioned method is expediently carried out with a device which consists of fixed jaws that hold one end of the pipe to be bent. Furthermore, a device is provided through which the free end of the tube is resistant a tension intended to cause the bending is exerted, and furthermore it is oscillatable an annular burner is provided which surrounds the tube and which gradually is moved along the pipe as it bends. There is a device on the burner attached, by which the forward movement of the same from the curve, i.e. H. is made dependent on the bending of the pipe.

In der Zeichnung veranschaulicht Fig. 1 eine Seitenansicht der Vorrichtung und Fig. 2 eine Endansicht derselben. Fig. 3 zeigt einen senkrechten Schnitt durch den Brenner im vergrößerten Maßstabe, während Fig. 4 einen senkrechten Schnitt rechtwinklig zur Fig. 3 darstellt.In the drawing, FIG. 1 illustrates a side view of the device and FIG. 2 an end view of the same. Fig. 3 shows a vertical section through the burner in enlarged scale, while FIG. 4 shows a vertical section at right angles to FIG. 3 represents.

Das eine Ende des Rohres α wird durch die Klemmbacken b in dem Ständer c festgeklemmt. An dem freien Ende des Rohres greift irgendwelche geeignete Vorrichtung an, durch die beständig ein das Biegen des Rohres bewirkender Zug auf das Rohr ausgeübt wird. Der Brenner d ist ringförmig und wird von den Rohren e getragen, die verstellbar an der wagerechten Welle f angebracht sind. Letztere ist in dem Träger g gelagert, der ebenfalls verstellbar an dem Ständer c angebracht ist. Das Rohr α wird in den ringförmigen Brenner d eingeführt und dann durch die Klemmbacken b festgeklemmt, worauf die Stellung des Brenners durch Verstellung der erwähnten Rohre geregelt wird.One end of the tube α is clamped in the stand c by the clamping jaws b. Any suitable device engages at the free end of the tube, by means of which a tension which causes the tube to bend is constantly exerted on the tube. The burner d is ring-shaped and is carried by the tubes e , which are adjustably attached to the horizontal shaft f . The latter is stored in the carrier g , which is also adjustably attached to the stand c . The tube α is inserted into the annular burner d and then clamped by the clamping jaws b , whereupon the position of the burner is regulated by adjusting the aforementioned tubes.

Claims

Of course, the size of the oscillation radius for the burner would first have to be determined, since the bending radius for the tube depends on this. This on-position is carried out by regulating the position of the carrier g. After the device is attached by which the bending of the tube is to be effected, the burner d is plugged in, ίο whereby the tube α heats up on the ring part surrounded by the burner and thus becomes so flexible that the tension exerted on the tube causes a bending of the pipe at the heated point. As soon as the tube λ bends, the burner d moves under the action of the springs i on the shaft / seated towards the free end of the tube, so that now a second ring part of the tube can be heated. Movement of the burner under the action of the springs i before the bending has taken place is prevented by a curved rod j which is attached to the burner and is supported against the tube α. When the pipe is bent, the support point of the rod j on the pipe is moved upwards, and so the burner can then move in an arc of a circle until the rod hits the pipe again. This mode of operation continues automatically until the pipe has obtained the desired bend. Since the bending takes place gradually, the burner d is also moved gradually towards the end of the tube, the shape of the curve being dependent on the setting of the burner d. As previously mentioned, the radius of this curve is determined beforehand. Such a step-wise bending of the tube α can of course be carried out in any curve. In order for the pipe to retain the bend it has once obtained, the point which has just been bent is cooled immediately after bending and this is achieved by allowing a number of radial jets of water to act on the pipe directly behind the burner. The gas is fed to the burner d through the tube e, and that the gas emerges from the tubes into the housing k (FIG. 3); Through the tubes m air is introduced into the housing /, from which the air exits through slots and thereby becomes with it. the gas also exiting through slits from the housing k mixes. The cooling water passes through the pipe ο into ring-shaped pipes p which are connected to one another through the pipe q and from which the water can flow radially onto the pipe α through the openings r behind the burner. The water not only keeps the burner cool, but also cools the bent tubular ring part. Godfather nt-A ν Proverbs:

1. A method for bending wide tubes with step-by-step heating of the pipe ring parts to be bent directly one after the other, characterized in that the pipe (a) clamped at one end (at b) is constantly subjected to a bending of the pipe at the free end is exercised, so that under the action of this train the tube is bent at the respectively heated point in such a way that an automatic forward movement of the heating device (d) takes place along the tube part to be bent.

2. Apparatus for carrying out the method according to claim 1, characterized in that an annular burner » (d) swingably attached to the frame (c) of the device and is provided with a pulley, through which the stop of the burner fs) respectively. the further movement of the same along the pipe to be bent (a). takes place automatically depending on 'the bending of the pipe caused by the pulling device. go

3. Embodiment of the device according to claim 2, characterized in that the burner (d) is attached to an adjustable in the distance from the burner oscillating shaft ff) , by adjusting the radius of oscillation of the burner and thus also the radius of curvature of the tube to be bent (a ) is determined.

4. Embodiment of the device according to claim 2, characterized in that on the burner (d) water spaces (p) are attached, from which through extension pipes fr) water is sprayed behind the ring point of the pipe heated by the burner, so that the bend point after the bend has taken place of the pipe is cooled and thus the pipe retains the bend once it has been obtained.

1 sheet of drawings.