DE4240906A1 - Process for the production of tubular components - Google Patents

Description

The invention relates to a method for manufacturing provision of tubular components with at least one egg nem branching pipe section, all Rohrab cuts lie in one plane.

In the manufacture of tubular components, in which, for example, individual pipe sockets branch off from a main pipe to one or both sides - as is also shown, for example, in FIG. 1 - the manufacturing process is because of the spatially curved intersection lines of the individual Pipe pieces very complex. For the manufacture of such tubular components according to FIG. 1, it is necessary, according to the previously usual methods, to first pierce corresponding pipe sections and to mill out or notch the connecting surfaces accordingly. Then, if necessary, existing taper cross sections must be drawn. If these pipe sections should also have a thread, this thread must be cut into the corresponding pipe sections. Finally, the individual pieces of pipe are then welded to one another, the thickness and non-uniformity of the weld seam generally giving a poor visual impression, and strength problems may also occur.

The present invention therefore has the object reasons to create a manufacturing process with which such a component with a branch in a very simple manner can be produced in just a few steps and that still results in an optimal finished part.

To achieve this object, the invention provides hen that the entire branching component from two ebe NEN sheets according to the processing of a half shell of the branching component by means of cold forming deformed into a corresponding half-shell and both Half-shells in the parting plane using laser welding be connected with each other.

With such a manufacturing process, it is up very simple way possible, such a branch to create a construction component that meets all the requirements claims are sufficient and no outside has standing welds.

If one or more of the pipe sections with one Thread should be provided, so it is in Weiterbil extension of the invention possible, these threads already Emboss flat on the flat surface and with the ble chen to the corresponding half-shells to deform.  

So this is a subsequent clamping and on no longer need to cut a thread.

The welding of the half shells should be done without additional material is added without reworking.

The flat sheets expediently point in the area of the branching pipe sections rounded radii design to optimize the power flow.

Based on a schematic drawing, structure and Operation of an embodiment according to the Er finding explained in more detail. Show

Fig. 1 is a perspective view of a branching component Ver actuating conventionally Fer,

Fig. 2 shows the development of a half-shell as a punched part,

Fig. 3 is a partially deformed half-shell and

FIGS. 4A-E, the individual deformation steps of such a half-shell and a finished pipe section.

In Fig. 1, a branching component is shown in perspective view, which is manufactured by the previously usual methods. This branching component has a central pipe section 1 to which a pipe socket 2 and a pipe socket 3 with an extension 4 are attached at the end. This pipe sockets 2 and 3 are connected to respective intersections of weld seams 5 and 6 to the main pipe 1, see even out a suitable non-welded intersection edge 7 is visible at the left end of the pipe stub 3 to the main pipe. 1 The main pipe 1 also has an internal thread 8 at the lower end.

According to the manufacturing method according to the invention, two flat sheets are first punched out in accordance with the development of a half-shell of the branching component, the lower sheet 10 being shown in more detail in FIG. 2. The corresponding developed sheet metal sections for the main pipe 1, the pipe socket 3 with the extension 4 and the pipe socket 2 can be seen as integral approaches. The thread 8 is directly embossed flat in the flat sheet metal blank 1 .

For forming reasons, in the region of the branching pipe sections 2 and 3 to the main pipe 1 there are corresponding material additions 11 in the cut Darge, which result in the course of the deep-drawing process force-optimized rounded radii between the individual pipe pieces.

The flat punched sheet metal blank 10 is then pressed by means of cold forming into a half-shell 12 , as is shown in FIG. 3. Here, the corresponding areas of the sheet metal blank 10 accordingly Fig. 2 can be clearly seen, namely the main pipe 1 , the pipe socket 2 and 3 with the enlargement 4 and the thread 8 , which is also curved with appropriate support.

In FIGS. 4A-D are the individual deformation steps of such a half-shell shown. In this case 4A is shown in Fig. Is a side view of the flat sheet-metal blank 10, which is represented by the corresponding Fig. 4B is a ste he deformation with a high bending of the lateral knurled.

Fig. 4C shows a further deformation step in which the sheet 10 is almost bent into a half-shell, while according to Fig. 4D the finished half-shell 12 has already been obtained.

The upper half shell is in the same way in mirrored contour shown.

Two such half-shells, namely the half-shells 12 and 13, are then aligned with one another in accordance with FIG. 4E and welded to one another at their contact surfaces 14 and 15, for example by means of laser welding, without additional material addition. Such welding can be done very precisely and does not require any reworking of the finished part, since no protruding weld beads have to be removed.

The corresponding thread 8 can be stamped so precisely into the flat sheet 10 that after corresponding deformation to half-shells and the welding of two half-shells the corresponding threads are precisely aligned, so that reworking is usually not necessary.

With the described method is very much on easy and quick way of making one Branching component that also represents a different than that configuration can be made possible, where the required strength is guaranteed and a Rework is usually not necessary.

Claims (4)

1. Process for the production of tubular construction parts with at least one branching Rohrab section, all pipe sections lying in one plane, characterized in that the entire branching component from two flat sheets accordingly the processing of a half-shell of the Ver branching component by means of cold forming to a corresponding half-shell deformed and the two half-shells are connected to one another in the parting plane by means of laser welding. 2. The method according to claim 1, characterized in that that the pipe sections are provided with a thread be such that the threads are already in the flat sheets embossed flat and with the sheets deformed to support the half-shells become. 3. The method according to claim 1, characterized in that the welding of the half shells without additional The material is added without reworking.   4. The method according to claim 1, characterized in that the flat sheets in the area of the branching Pipe sections rounded radii for power flow op have a timely design.