DE2822114A1 - METHOD OF BENDING PIPES - Google Patents

Description

18 630

INDUSTRIAAUXILIARALAVESA, S.A. (INAUXA, S.A.) Poligono Industrial Saracho, AMURRIO (Alava), Spain

Method of bending pipes

The invention relates to a method of bending pipes to produce axles for motor vehicles, for example to increase their quality compared to those currently manufactured.

In current methods of manufacturing bent tubes, such as axles for vehicles, all bends have been eliminated uniformly produced by a press. In order to avoid deformation in the bending zones, one guides after the bend some parts as rings or as balls lined up to form a chain, which make the axis the desired Takes shape.

This type of production poses considerable difficulties. Apart from the fact that the process is very slow, pedal When the parts or rings are inserted under pressure, deformations or, relatively often, breakage of the material occur, see above that asymmetries are created, which in the case of tubes for axles for automobiles, which are subject to movements are very disadvantageous.

09828 / 0S4?

28221H

The method according to the invention, which consists in that before the actual bending process of the lateral ends of the Rohres ago some stiffening elements are introduced into the bending section, which is on the inside during the bending place on the pipe and act as support members against undesired deformations, eliminates the aforementioned difficulties, so that you get a bent tube of very good quality and with great speed.

Stiffening elements are preferably used which comprise a fitting piece and a special shaped piece, which are connected via an articulated arm that acts on them in an articulated manner, the shaped piece serving as the actual support member and, as a result of the pivoting connection between the fitting piece, articulated arm and shaped piece, an adaptation of the reinforcement element to the drilling shape as well as its pulling out of the bent tube is possible.

According to the invention, a pipe with the appropriate bends can be used without any deformation and without any mechanical effects on the pipe, which the deformations in the known Process generated, received.

Further features, details and advantages of the invention emerge from the following description of the possible procedure based on the drawing. Show it:

Figure 1 shows a tube which is to be bent, for example as the axle of a motor vehicle;

FIG. 2 the tube that has already been bent;

Figure 3 apparently the stiffening elements, which laterally are inserted into the pipe and

Figure 4 is a view of the bent tube with the reinforcements

'9 09828/0547

fastening elements in the position after bending.

In the manufacturing process, one starts from a tube 1 of the desired length, which is in a corresponding mechanical Process, preferably by means of a press, is to be provided with bends 2, e.g. around an axis of a Form motor vehicle.

According to the proposal of the invention, a few are introduced into the lateral openings of the tube 1 before the bending operation Stiffening elements 8, which are shown in Figure 3 and, by laying on the inside of the pipe, as support members serve against undesired deformations. The stiffening elements have no mechanical effect on the Inside the tube - or at least only to a very small extent - nevertheless lead to an improvement over this the previously known procedure.

The stiffening elements 8 comprise a according to the invention Fitting piece 3, which by means of an arm 4- with a joint piece 5 is articulated at point 7. The arm 4- engages the adapter 3 at point 6.

After inserting the stiffening elements 8 from one side of the tube 1, the bending takes place in an expedient manner, the stiffening elements 8 adapt to the resulting bend 2 via the joints 6 and 7, so that the Part 5 as a support member against undesirable deformations of the Tube 1 is used.

The joints 6 and 7 allow pulling out after bending of the stiffening element 8 from the pipe 1 without any mechanical action that would damage the pipe 1 could.

'9 09828/0547

Claims (2)

18 630 30 / Ko INDUSTRIA AUXILIAR ALAVESA, S.A. (INAUXA., S.A.) Poligono Industrial Saracho, AMURRIO (Alava), Spain Method of bending pipes Claims Λ.) Method for bending pipes, characterized in that, before the actual bending process, some stiffening elements (8) are introduced into the bending section (2) from the lateral ends of the pipe (1), which stiffeners are attached to the inside of the pipe during the bending create and act as support members against undesired deformations. 2. The method according to claim 1, characterized in that stiffening elements (8) are used which a Fitting piece (3) and a special shaped piece (5) (Figure 3), which each have an articulated on them attacking articulated arm (4 ·) are connected, the shaped piece serving as the actual support member and as a result the pivot connection between the fitting piece, articulated arm and shaped piece an adaptation of the stiffening element the tube shape and its pulling out of the bent tube (1) is possible. "9 09828/0 B 47 ORIGINAL INSPECTED