SU866325A1 - Method and device for bending tube - Google Patents

Description

(54) PIPE BENDING METHOD AND DEVICE FOR ITS IMPLEMENTATION

one

The invention relates to mechanical engineering, in particular to a method of bending pipes and a device for its implementation.

There is a known method of bending pipes, which consists in performing the bending operation of the CZ.

However, this method does not reduce cracks at the point of bending of the pipe.

There is also known a method of bending / pipe and a device for its implementation, consisting in performing an operation of installing it in a pipe bending device and then bending it in a 3Z.

However, this method does not reduce cracking in the bending zone of the pipe.

The purpose of the invention is to reduce the cracking in the bending zone of the pipe.

This goal is achieved by the fact that, after performing the operation, bend it, it is installed on the plasma-jigger, and then the agent is inserted into the loading device: the inside of the pipe under pressure, which ensures plastic deformation

the bent section and the fact that the junction conductor is made in the form of a base with .dieMHbiMH clamps for straight sections of the bent pipe to which a loading device is connected, made in the form of a hydraulic system with a stopcock installed in it on the pressure supply side, intermediate storage vessel and drain valve.

ten

FIG. 1 shows a pipe bending device; in fig. 2 - a variant of the supply circuit of the normalizing body inside the curved pipe under pressure; in fig. 3 IS The operation of installing the pipe on the plasma conductor.

Claims (2)

Pipe bending device 1 is used to implement the method, in which pipe 2 is installed, plas20 jig 3 with removable clamps 4, stoppers 5, stop valve 6, heated tank 7, intermediate storage vessel B, drain valve 9. The way pipe bends is effected in a way. First, the pipe 1 is installed in the pipe bending device 2 in which the pipe 1 is bent by the required amount. Then, pipes 1a of pipe-bending device 2 are removed and installed on plasma-inductor 3 on which pipe 1 is attached with removable clamps 4 with Yomoshch. Then agent 1 is supplied into pipe 1, for example, mineral oil heated to a temperature lower than body temperature. the system where the pipe 1 is bent is installed. Since the plugs 5 hermetically close the inlet and the outlet of the pipe 1, the agent opens the shut-off valve; valve 6 will go inside the pipe 1. After removing all gases from coarse 1, close the stop valve 6 and the drain valve 9. The pipe 1 prepared in this way is installed in the thermostat 10. As the result of heating the oil in the pipe 1, pressure develops that can deform the pipe 1. Then cool plazductor 2. The normalizing body is drained into intermediate storage vessel 8 or into heating vessel 7. When used as an agent, for example, an alloy of antimony and tin, the circuit is simplified and only plasma conductor 3 with pipe 1 is required for this, heating a container 7, in the case of PPH: Le Nain water as the agent, and especially in winter time will be required only shyu jig 5 with 1 truboy- and removable gripper 4. Feasibility efficiency is that in umenshats greshinoobraeovanie iziba zone rough. 1. The method of bending pipes, consisting in performing the operation of installing it in a pipe bending device and subsequent bending it, characterized in that, in order to reduce cracking in the bending zone of the pipe, after performing the bending operation, it is installed on the plasma distributor, and then entering t agent through a loading device inside the pipe under pressure, providing plastic deformation - a curved section. 2. A device for bending pipes containing a base and a plasma jig, characterized in that, in order to provide equal tensile stresses, the plasma jig is made in the form of a base with removable grips for straight sections of the bent pipe to which the loading device is attached . 3. The device according to claim 2, characterized in that the loading device is made in the form of a hydraulic system with a shut-off valve heated by a container, an intermediate storage vessel and a drain valve installed on the pressure supply side. Sources of information taken into account in the examination 1. USSR author's certificate number 642571, cl. R 16 L 43 / OO, 1976. 2.Patent of France No. 2279017, PL, R 16U 43/02, 1976 (prototype). g FIG.