DE1224259B - Device for producing or shaping a pipe socket - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B 21 c

German KL: 7b -19

Number: 1224 259

File number: H 35056 I b / 7 b

Filing date: December 10, 1958

Opening day: September 8, 1966

The invention relates to a device for producing or shaping a pipe socket large diameter and large wall thickness from the wall metal of the workpiece, e.g. B. a manifold, with a die that is placed on the workpiece from the outside and against which the Stamp from the outside initially compressed wall metal is formed with an extraction stamp.

In a known device of this type, this can be done by the extraction ram in the mold cavity The die is displaced into it, the metal forming the nozzle is displaced differently into the mold cavity will. The nozzles produced with this device have mouth edges of different heights on. It can also only be used to produce nozzles with a relatively small wall thickness.

The invention is intended to avoid these disadvantages in that the die is a the recess forming the neck at the end face to the outside closing wall with a passage for has the extraction punch.

When the finished nozzle is formed with the extraction punch, the displaced wall metal is then laid down of the nozzle not only against the wall of the recess of the die forming the nozzle, but towards the end of the shaping process also against the annular end wall that forms the passage for the extraction ram and protrudes inwardly from this recess. To this Way, the nozzle is everywhere, also at its mouth edge, exactly on this in the same way, through the Wall formed at a given height so that it does not require any post-processing. It can also that the flow of the material in the direction of the drawing punch movement through the annular die face is limited, whereby the material is displaced laterally into the mold cavity of the die a nozzle with considerable wall thickness will be created.

The die can be designed in two parts and have a part forming the nozzle and a preceding, have the passage for the extraction punch having part. Compared to a one-piece Die has the advantage that the die can be produced more easily and for different purposes Cross-sections of the shaping recess are often only replaced by the part of the die that forms it needs to be, while the part forming the passage with a constant punch cross-section can be maintained. In addition, the two-part die makes it easier to carry out the introductory upsetting process.

Device for manufacturing or molding
of a pipe socket

Applicant:

Andre Huet, Paris

Representative:

Dr. W. Schalk, Dipl.-Ing. P. Wirth,

Dipl.-Ing. G. E. M. Dannenberg

and Dr. V. Schmied-Kowarzik, patent attorneys,

Frankfurt / M., Große Eschenheimer Str. 39

Named as inventor:
Andre Huet, Paris

Claimed priority:

France of December 12, 1957 (753 703) - -

The invention is explained in more detail below using an exemplary embodiment.

F i g. 1 to 4 show in their order the production of a pipe socket with the inventive Contraption.

In the course of the first step, an oval shaped punch c is inserted from the outside into the inside of the previously heated pipe socket and pushed or pulled into the pipe socket, whereby the wall of the pipe socket b, as shown in FIG. 2 shows b ^{1 being} expanded into a conical cup. This expansion of the wall of the pipe socket could also be achieved by a rotating pressure tool inserted into the pipe socket. During this process, the wall can be thickened at the same time.

Then a z. B. two-part die e, f arranged, the interior of which corresponds to the dimensions of the desired finished pipe socket. After the pipe extension b ¹ has been heated, a punch g is inserted into the interior of the collecting pipe α, which stamps the in the F i g. 3 and 4 illustrated partly cylindrical, partly conical shape. This punch is now driven in the direction indicated by the arrow F through the pipe socket b ¹ . During this movement, the punch strikes the curved part h of the pipe extension b ¹ and lifts this part, the metal from the part h being moved into the areas shown in FIG. 3 visible

609 659/136

union, the tube socket b ¹ surrounding cavity i between the tube socket and the inner surface of the die e is displaced into it. After the punch g has passed through the pipe socket b ¹ , it has the finished socket shape shown in FIG. 4 / with the inner diameter BB and now has a wall thickness that is greater than the initial wall thickness of the original pipe socket b.

The die e, f can be in one piece or consist of two parts e, f . In the case of a die consisting of two parts, part e of the die can already be used at the beginning of the first work step in the form shown in FIGS. 1 and 2 can be arranged around the original pipe socket. As the F i g. 3 and 4 show, the upper part / die is then used on the lower part e between the first and second work steps. A one-piece die, on the other hand, can only be put on after the first step has been completed. As can be seen, the opening k in the upper part / die allows both the passage of the punch c used in the first operation (Figs. 1, 2) and the passage of the punch c used in the second operation (Figs. 3, 4) Stamp g.

The use of a two-part die also offers the advantage that the first part e of the die can be given a height which corresponds to the axial length of the wall of the tube attachment b ¹ (FIG. 2) which was partially formed in the first operation. If the second part / the die is then placed on the lower part e , then corresponds to that shown in FIG. 3 it can be seen, the inner surface of the die exactly the desired dimensions of the finished formed pipe socket / (Fig. 4).

Claims (2)

Patent claims: 1. Device for producing or shaping a pipe socket of large diameter and large wall thickness from the wall metal of the workpiece, for. B. a collecting tube, with a die applied from the outside to the workpiece, against which the wall metal initially compressed from the outside by means of a die is formed with an extraction die, characterized in that the die (e, f) has a recess forming the nozzle Q) (i) has a wall that closes off at the front with a passage (k) for the extractor (g). 2. Apparatus according to claim 1, characterized by a two-part die (e, f) with a nozzle (/) forming part (e) and an upstream part (/) having the passage (k) for the extraction punch (g ). Considered publications:
German Patent No. 145,373;
U.S. Patent No. 2,292,799. 1 sheet of drawings 609 659/136 8.66 © Bundesdruckerei Berlin