DE7102896U - MACHINE FOR COLLARING PIPES OR THE SAME - Google Patents

Description

Robert Reichling & Co. KG., 415 Krefeld

Machine for necking pipes or the like.

The N2uerung concerns a machine for the necking of Pipes, or the like by means of a hydraulic Necking device, consisting of a mandrel attached to a piston of a hydraulic press.

With machines of this type, neckings are made on pipes or the like in order to create branch nozzles for welding on further pipes or nozzles.

Branch nozzles are used in various forms in pipeline and tank construction. Because of this, are Devices and devices for necking known, e.g. as:

a) tools for necking by hand,

b) mechanical necking devices,

c) transportable hydraulic necking devices in the form of pullers Printing devices,

d) stationary hydraulic necking devices,

e) pipe necking devices,

f) Bottom necking devices.

These known necking devices work with conical or spherical spikes, with an elliptical pre-hole in the tube to be necked for necking have to be. In addition, when necking is carried out by means of the known devices, the to be necked must be heated Position required. In the case of longer deformations, the workpiece to be deformed must be kept at a prescribed temperature during the deformation process will. Warming up not only takes a lot of time, but also high energy costs.

The innovation is based on the task of avoiding heating and necking in the cold drawing process perform.

This object is achieved by a machine frame with an insert plate into which a die with a the hole adapted to the mandrel and one provided with an elliptical pre-hole to be necked Tube-adapted, circular recess used is, wherein the tube can be placed on the die and the drawing mandrel through the pilot hole and the bore of the die is arranged to be pulled through.

With the new machine, the collar height of the collar can be made to measure using the cold drawing process so that no reworking is required at the end of the neck, i.e. the upper edge of the branch connection is just. Another advantage is seen in the fact that, by means of the new machine, branch nozzles can also be used for pipes can be produced in the cold drawing process, which have the same diameter as the pipe.

The essence of the innovation is therefore the use of a die with a hydraulic pulling device known per se seen.

An embodiment of the innovation is shown in the drawing and described in more detail below. Show it:

Fig.l a section through the machine, Fig.2 a view of the interchangeable

Die in the direction of arrow "A"

according to Fig. 1,
3 shows a finished collar.

In a machine frame 1, a replaceable insert plate 2 is used, which according to the

Has a bore diameter of the collar. on The bottom of the machine frame is a hydraulic 3 attached to a motor pump 4, the cylinder 5 of the hydraulic system by means of a plug connection 6 with a t tie bolt 7 is connected. The tension bolt 7 is on the

1 free end provided with an external thread.

j The insert plate 2 has a further recess

1 provided, in which the approach 9 of the die 8 is used

! can be. 0er approach 9 is designed so that the

j Die always in a central position to the hydraulic

■ likylinder 5 is held. The die 8 is also

j provided with an Eohrung 10, which corresponds to the outer diameter

* corresponds to the collar and goes in with a radius

• the circular neck 11, into which the out-

necking tube 14 is inserted.

The mandrel 12 is pushed into the pipe from the outside ₍ until it is above the prepared

I seated elliptical pre-hole 15. Then the train

bolt is screwed into the drawing mandrel from below through the pilot hole 15 and then by means of the plug connection 6 connected to the cylinder 5. On the tie bolt 7 a centering disc 13 is placed, which is exactly the

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• f

Pre-hole 15 is adapted and sits in this. This ensures that the tension bolt 7 and thus the drawing mandrel 12 sits exactly symmetrically above the preliminary hole 15 and thus also produced a perfect branch connection will.

Because both the diameter of the tube 14 and the diameter of the necks 16 are different, must have a separate die 8 for each pipe diameter and neck diameter, which is due to the construction-related, inevitably centric guide made of light metal is to be present.

As a result, the dies 8 can be exchanged quickly and easily and are only loosely inserted into the insert plate 2 inserted. Even with larger pipe diameters, such a die can be placed on the machine by hand will..,.

9;

Claims (5)

till t • t I claims for protection 1. Machine for necking pipes, or the like,. by means of a hydraulic necking device, b Going out of a mandrel attached to a piston of a hydraulic press, marked through a machine frame (1) with an insert plate (2) into which a die (8) with one of the Drawing mandrel (12) adapted bore ClO) and one to be necked, with an elliptical pre-hole (15) provided tube (14) adapted circular Recess (11) is inserted, v: obei the tube (14) on the die (8) Auflegfcar and the Ziehdorr. (12) is arranged so that it can be pulled through the pilot hole (15) and the bore (10) of the die (S). 2. Machine according to claim 1, characterized in that that the mandrel (12) is spherical and is provided with a Gev / indebohrunc into which a with the piston (5) eir = r hydraulic (3) releasably connected tie bolt (7) is screwed. 7102886.9. ': 3. Machine according to claims 1 and 2, characterized in that a centering disc (13) adapted to the pilot hole (15) is arranged on the tie bolt (7) in such a way that it sits in the pilot hole (15) and the mandrel (12) centered. 4. Machine according to claims 1 to 3, characterized in that for different necks a separate die (8) is inserted into the insert plate (2). 5. Machine according to Claim 4, characterized in that that the matrices (8) are made of light metal.