DE6914827U - DEVICE FOR COLD FORMING TUBE ENDS. - Google Patents

Description

ERWIN WERNER VDI L.

b «ratrad« r Ie ^ eol ^ ur Ln HtsatmAm {

«00 DÜSSELDORF!

66 »a * 67354?

Act No. 1189 ff / B. Düsseldorf, April 11, 1969

Günter Zimmer, 4 Düsseldorf, Jahnstraße 107 Device for cold forming pipe ends.

The invention relates to a device for cold molding, i.e. for expanding or drawing in drill ends with any cross-section.

Conical reducers are used to connect pipe ends with different diameters Weld seam to be connected to the pipe ends. It is also known to expand pipe ends via conical mandrels or through Reduce driving into conical bushings so that the connection to the larger or smaller pipe end is only one Owns weld.

As in the pipe processing industry very often pipes with Different diameters are to be connected, pipe end forming machines were used Developed for expanding and pulling in pipe ends, these well-known pipe end forming machines However, they are only useful in stationary use because they are too complex and therefore too immobile and proportionate are expensive to manufacture.

The invention is based on the object of providing a transportable device for deforming pipe ends which by a simple, compact structure and in particular by a low weight and a short overall length

excels.

This task is solved by combining the following features:

a) a pipe clamping head in which the wedge-shaped clamping jaws, which surround the pipe in a ring shape, are longitudinally displaceable are stored, their clamping forces on the pipe

are proportional to the deformation forces for the pipe,

b) a control cylinder with the same axis as the clamping head and connected to it by tie rods a reversible pressure piston for exchangeable mounting of pipe end deformation tools,

c) a deformation tool for expanding pipe ends, consisting of two conical mandrels arranged one behind the other, the distance between which can be changed,

d) a deformation tool for pulling in pipe ends, consisting of two one behind the other with conical bore equipped sleeves, the distance - 'from each other can be changed.

An embodiment of the invention is illustrated in the drawing, they show:

1 shows a longitudinal section through a pipe end deformation device, in which a pipe of smaller diameter is widened on the left-hand half of the section and a pipe of larger diameter is shown retracted on the right-hand half of the section,

- 3 Fig.2 a section along the line AA of Fig.1 and

3 shows the view in direction B of the clamping surface of a clamping jaw.

The wedge-shaped clamping jaws 2 are in the pipe clamping head 1 Mounted longitudinally displaceably and guided with their keyways 3 in the wedge webs 4 of the pipe clamping head. By longitudinal displacement the jaws with their toothed clamping surfaces 5 can be continuously adjusted to any pipe outside diameter will. The pipe clamping head is connected to the control cylinder 7 via tie rods 6, the pressure piston 8 of which is at its open end accommodates the deformation tools. To expand the pipe end 9, two arranged one behind the other are used Conical mandrels 10 and 11, the distance between which can be changed by means of the screw connection 12. The holder of the conical mandrels The intermediate sleeve 13 mediates in the pressure piston. The pipe end 14 is drawn in via the conical Holes equipped sleeves 15 and 16, the spacing of which is changed by the screw connection 17 can be. The sleeves are arranged directly in the printing cylinder. Clamping head and control cylinder are still connected to each other by a T-profile, the free web 18 of which is used to fix the device, e.g. on construction sites, is clamped in a vice. To deform the pipe ends, the pressure medium reaches the in direction C Pressure piston and moves it with the deformation tools against the clamped pipe ends, which are expanded in the process or be withdrawn. Since the widened pipe ends after the deformation have the tendency to slightly re-emerge retracted and vice versa the retracted pipe ends tend to widen slightly, are to be retrospectively

Correction of the deformed pipe ends of the second conical mandrel or the second sleeve with conical bore to the first deformation tool downstream, vfobei the correction through Change in distance of the deformation tools the respective Conditions can be easily adapted. By introducing the pressure medium at D, the pressure piston becomes after the deformation process returned to its original position .

IL

Claims (1)

ERWIN WERNER VDI consulting engineer 1., PatsntMchen DÜSSELDORF 1 Achenbadutnße 66 Ruf 673549 Current number 1189 W / E. Düsseldorf, April 11, 1969 Claim to protection. Device for cold forming pipe ends, characterized by the combination of the following features: a) A pipe clamping head (1), in the wedge-shaped, the pipe (9,14) surrounding clamping jaws (2) are mounted longitudinally displaceable, the clamping forces of which on the pipe Deformation forces for the pipe end are proportional. b) A control cylinder arranged on the same axis with the clamping head (1) and connected to it by tie rods (6) (7) with a reversible pressure piston (8) for exchangeable mounting of pipe end deformation = tools (10,11,15,16). c) A deformation tool for expanding pipe ends, consisting of two conical mandrels arranged one behind the other (10,11), the distance between which can be changed. d) A deformation tool for pulling in pipe ends, consisting of two one behind the other with conical bore equipped sleeves (15,16), the distance from one another can be changed.