DE3032106C2 - Process and device for the continuous production of pipes with graduated inner and outer diameters - Google Patents

Description

35 Fig. 2 a section through Fig. 1 with segment

tools for a round robin,

The invention relates to a method for continuous F i g. 3 a segment tool for a hexagonal tube

the production of pipes with stepped inner Fig. 4 the arrangement of profile rollers in the length

and outer diameter by drawing with the pipe cutting

while pulling through a variable potash, the arrangement of profile rollers in the Ouerbner opening is pulled, and a device for cutting

Implementation of the method with at least two with As shown in Fig. 1 is a pipe 1 with a

Provide your deformation sections on the pipe's longitudinal axis with different diameter sections The pipe to or away from these, the pipe can almost initially be carried out in a manner known per se completely enclosing caliber segments. 45 external drawing tool 2 with internal tool 3 that is

It is from the German Auslegeschrift 12 82 425 beren rod 4 is attached, drawn and then with Knows, centrifugally cast pipes to a smaller wall thickness and the help of the caliber of a multi-part segment tool tube Pull out length in one operation or total 5 can be provided with retractions to reduce to smaller outer diameters. The movement of the segment drawing tools 5 takes place

receives the pipe in its entirety d. H. via 53 either mechanically or hydraulically its entire length or cross section a smaller one in the direction of arrow 6 the tool 5 in engagement and in Wall or a smaller outer diameter, arrow direction 7 is disengaged, arrow 8 indicates the so not in sections formed pulling direction of the pipe. The pull rod 4 carries that

It is also known pipes with a plurality of rear-internal drawing tools 10, which are connected to the segment drawing mechanism switched pulling devices with or without 55 tool 5 cooperates form-giving When with a Internal support or pipes with upstream drawing ring 2 and an internal tool 3 that are changed in sections pull the other wall thickenings. is worked, the inner tool 10 is a

The production of reduced or expanded intermediate rod 9 is connected to the inner tool 3 Pipe ends by drawing or pressing is also possible in FIG. 2 and 3 sections shown

Knows the disadvantage here is that the pipes previously on eo Fi g. 1, where F i g. 2 a segment drawing tool with bei-Lange cut and in separately arranged illustrations, for example, four segments 5 and a round drawing need to be edited. has profile 11 and F i g. 3 a segment drawing tool The object of the invention is that the method is con - with, for example, three segments 5 and one six-continuous Manufacture in principle of endless tube lengths corner drawing profile 12 represents.

made possible from different outside diameters, 65 The use of profile rollers 13 is shown in FIG The finished pipe wall thicknesses arranged in a roller caliber are produced with the plug or hollow drawing are generated and by the re-rolling are engaged in the direction of arrow 14 and in following procedural scheme in any (disengaged in the axial direction of arrow 15)

The direction of the pipe is indicated by arrow 16 The scope of a roller caliber consists of the profile 17 corresponding to the starting tube, the profile 18 of the deformed pipe part and the transition 19 between the two profiles.

In a section through Fig.4 is a sentence in Fig.5 Profile rollers with, for example, four rollers 13 and a round deformation profile 20 shown The profile rollers must be driven in synchronism.

When using this roller caliber, there are several process variants:

a) The rollers fixed in the axis revolve, i.e. one becomes periodic in length and depth recurring gradation achieved

b) The caliber arranged as in a) is brought into engagement with its largest diameter (as in Fig. 4 recognizable) and held the desired length of the gradation there, then again in Normal position swiveled back (smaller diameter), whereby both diameters act as calibers can.

c) With a height-adjustable roller caliber, the depth can also be changed.

d) The roller caliber can be provided with different diameters on its circumference, see above that different gradations are possible even with fixed roller axles. The transitions 19 can have different angles.

30th

For this purpose 4 sheets of drawings

35

40

50

55

Claims (1)

1 2 Length related) areas, paragraphs or the like. Claims: can be brought, as well as a device for I carry out this procedure. A turning of the raw I 1. Process for the continuous production of res, as is necessary in the prior art ig pipes with stepped inner and outer diameters are not required according to the invention. § knives by pulling, the pipe during the To solve the problem is according to the invention a I pulling through a changeable calibration port method and apparatus suggested like it ?! is drawn, characterized in that it is described in the patent claims B. ^{that after} an upstream stopper or by the method according to the invention, the upstream g hollow drawing in the same work step a drawing-in 10 suggested combination with a known drawing-in y certain pipe sections with or without internal dressing, pipes in production lengths with different % Support takes place with several pulling processes of different diameter sections and profiles ά one behind the other and offset in the circumferential direction are produced in one operation and then Ϊ can be carried out effectively. be divided in a known manner to the length of use. W 2- method according to claim 1 characterized by 15 Another advantage of the device according to the invention g shows that the pulling-in process results in profiling through the use of the segment pulling tool $ gen can be generated. Pipes to pull that were not previously in a special _{N / A} method according to claims 1 and 2, since the operation has been fished. For this purpose, the segment a characterized in that the transitions from the pull-out tool are completely open and the pipe so far i Bdurchjnesser to the pull-in sections through 20 pushed through the device that it is from the Eg the shape and control of the external support - pulling pliers in the well-known W "« · -rfasst ™ *> * R ~ R ^ v _n Be uneven or uneven. of the drawing process is the Segmentzienweriaeug '«- p 4. Device for carrying out the process controls closed. j§ according to one of claims 1 to 3 with at least It is also possible, instead of the segment drawing f, to use two with their deformation sections on the 25 witnesses profile rollers, which in a roller Pl pipe longitudinal axis to or away from this movable, scaffolding are combined. It is also possible that U to provide the pipe with profiles that almost completely adjoin the potash segment drawer ; | super-segments, characterized in that the device according to the invention can also be used in 3j ( ⁵ > I ³ ) a pull ring (2) and a plug (3) can be installed in the upstream systems. & ^net and the fact that several such inputs are 30 In the drawings, a possible embodiment & pulling devices in the circumferential direction of the pipe in the form of a device according to the invention. g are arranged offset attacking one behind the other. shown table it shows % F i g. 1 the device with an already partially Bi retracted pipe,