US 4,000,636 AGranted

Pipe bending machine

OwnerVladimir Nikolaevich Shubin, Viktor Sergeevich Silantiev +3inventors

InventorsVladimir Nikolaevich Shubin, Viktor Sergeevich Silantiev, Alexandr Sergeevich Khlyntsev, Antonina Petrovna Barsova, Galina Alexeevna Rodionova

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Abstract

A pipe bending machine comprising a bed plate which mounts a bending head, a mechanism for feeding pipes to be treated into the bending head, and a drive. The pipe feeding mechanism consists of two parallel rows of rollers arranged symmetrically in relation to the pipe axis and fitted into cages used commonly by each row. The rollers in each row and the associated cage are embraced by a hauling chain designed for coupling the drive which moves the chain toward the bending head. Placed on the outside on each chain is a closed-loop strip made of elastic friction material. A pipe to be treated is clamped in the gap between the strips and is fed to the bending head when the chains are displaced. The pipe bending machine of the present invention permits bending the pipes of any shape in space, including parts made of thin-walled and soft metal pipes.

Claims8

Dependent claims

A pipe bending machine comprising a bed plate;

a bending head mounted on said bed plate;
a mechanism for feeding pipes to be treated into said bending head, with said mechanism installed on said bed plate;
a drive serving to actuate said bending head and said feeding mechanism, with said drive installed on said bed plate;
two parallel rows of rollers of said feeding mechanism arranged symmetrically relative to the axis of the pipe being treated;
two cages, each incorporating one of said rows of rollers, with the first said cage rigidly fixed to said bed plate and with the second said cage installed on said bed plate, allowed to turn in the plane normal to the axis of said rollers and spring-loaded in the direction toward said first cage;
two closed-loop hauling chains, each embracing the rollers of one of said rows in assembly with said cage, with each said hauling chain provided on the inner side for coupling with said drive used to displace said chain toward said bending head;
and two closedloop strips made of elastic friction material, each strip being formed of two belts which cooperate to clamp the pipe, each strip being provided on the outside of one of said hauling chains, and with the pipe clamped in the gap between said chains which feed said pipe into the bending head when said chains are displaced.

4 more elements

Dependencies are inferred from the claim text.