SU114650A1 - Profile bending machine for obtaining corrugated pipes of cylindrical, conical and ogival shape from metal tape - Google Patents

Description

Known pipes, corrugated in the axial direction with the use of detachable shaped mandrels.

A feature of the present invention is that, in order to provide tension during winding, a rotary mandrel with a rotating mandrel and a calibrating device is used, O: ensuring that the profiled material is pressed in the zone of its bend. In order to ensure the winding of the profiled metal strip on the mandrel along a helical line, the clamping device and the calibrating device are mounted on a brace providing them to be raised relative to the mandrel.

Fig. 1 shows a front view of a profile bending machine consisting of the following main components: a hydraulic calibrating device 1, a clamping device 2 mounted on the same bracket (traverse) 3, a hydraulically lifting device 4 mounted on the plate 5.

FIG. Figure 2 shows a profiling die consisting of an upper punch 6 and a lower die 7, bolted together.

FIG. 3 - tensioning device, which consists of a cylinder cylinder 8, a working shchestren 9, a calibrating bar 10, a rotating mandrel mounted on the adapter block 12.

The principle of operation of the machine is as follows; The metal strip, before entering the profiling die (Fig. 2), is centered with the slats. In the core filler, the formation of a metal strip converges into a straight corrugation due to a gradual increase in the angle of inclination of the side wall of the corrugation. The resulting straight corrugation from the core die is fed to

No. 114650

a rotating mandrel (fig-3), on which it is pulled up under pressure. Tension in the straight section of the corrugation is created by clamping the workpiece with a certain force in the core filler, for which a hydraulic clamping device 2 is provided in the installation. When winding onto the mandrel, the workpiece is additionally crimped with a calibrator 1.

The mandrel is made of two parts in order to provide a ledge on it at the junction of the halves of the mandrel. This step is necessary for laying the intermediate material (low-melting metal, rubber with a cord, etc.) - The profile fixed to the mandrel with the intermediate material winds the mandrel into a flat spiral when the mandrel is rotated. After the flat helix is made, the intermediate material is removed from the helix, and the flat helix is transformed into a corrugated tube by placing the helix coils along a helix and then soldering or roller welding along the helix helix coils.

The described machine can be used in industry for the manufacture of corrugated pipes with a diameter of 400 to 2000 mm from heat-resistant and stainless steel, as well as from non-ferrous and titanium alloys.

Subject invention

1. Profiling and bending machine to obtain corrugated pipes of cylindrical, conical and ogival shape from a metal tape, which, in order to provide tension during bending, used a profiling split filler with a rotating mandrel and calibrating a device which ensures the pressing of the profiled material in the zone of its bending 2 - The form of embodiment according to claim 1, differing from the fact that, in order to ensure that the profiled tape is wound on a mandrel along a helical line, the clamping device and gauge These devices are mounted on a bracket that provides their lifting relative to the mandrel.