SU112824A1 - Pipe bending mandrel machine - Google Patents

Description

Pipe bending turf machines for the manufacture of bent branches of their steel pipes without heating and sandblasting them, with interchangeable bending rollers, dories, and uior pads, are known. When it is necessary to change to bending branches of pipes of a different diameter, the bending rollers, dorias, and pressure pads change with the setting up of the machine for. getting quality bending. The flock spends a large amount of time. With continuous industrial preparation of pipe lines, the number of machine tools has to be increased.

In the described design of a besveraladochny mandrel pipe bending machine for pipes with diameters of 89, 108, 133, 159 and 219 mm, this disadvantage is eliminated by using a multi-strand bending roller with a set of permanently installed mandrels and pressure shoes, which are controlled by a common wedge mechanism by means of a screw with an concentrator.

FIG. 1 shows a top view of the machine; in fig. 2 is a side view.

With the help of clamping blocks / and eccentrics 2, bending pipes can be clamped into the stream of a multi-bending bending roller 3 mounted on the shaft of the frame 4. For the direction of the pipe to be bent, there is a stop device 5 consisting of a bracket 6, an emphasis with clamping pads 7 and a wedge 8, controlled by a rotating screw with a stick ;; scrap 9.

In order to ensure a high-quality bending of the pipes, the latter are put on mandrel mandrels 10 with mandrel braces 11 fixed in a natal cord 12 mounted on frame 4. The mandrel braces 11 have a length equal to 0.4 of the length of the bent tube. Such a length of the mandrel plugs, g 11, makes it possible to carry out several deflections on the half of the pipe, followed by its rotation and putting on the mandrels 10 for bending the other half of it without cutting the pipe into separate parts.

The machine is driven by a winch 13 with the help of two pulley blocks consisting of blocks 14, steel ropes 15 and a bending sector.

№ 112824

- / 6, to which the ends of the ropes 15 are attached. By reversing the winch J3, the working and return stroke of the bending roller 3 of the machine are eliminated.

All parts of the machine are assembled on the frame, and the machine is installed without fZdment. The special equipment can be installed on any mandrel bending machine.

The process of pipe bending on a machine being rendered is the same as on known mandrel pipe bending machines. Direct-transfer tube bending machines with the same bending device circuit can be used for cutting pipes with diameters of 25-75 mm (1-3).

The use of these machines provides less time for pipe bending work.

Subject invention

A pipe bending machine for the manufacture of bent parts of pipelines without sandblasting and heating, and longitudinal mandrels and pressure pads, characterized in that a multi-bending roller, controlled by the general machine, is used to eliminate the time required for readjustment of the machine for different diameters of bent pipes. to; single mechanism.

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