SU829342A1 - Method of producing inner finned tube - Google Patents

Description

54) METHOD OF MANUFACTURING A PIPE WITH AN INTERNAL CRUSHING

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The invention relates to metal cutting, in particular, methods for the manufacture of tubes with internal fins, which are used as heat pipes with a groove capillary structure.

A known method of manufacturing a pipe with internal fins is that a multi-thread is cut on a thin-walled tubular billet, then the billet is cut through through the billet through one of the passes, straightened, straightened, bent by protrusions inside until the edges come together and boil the gap between the edges 1

The disadvantages of this method are the laboriousness of manufacturing a thin-walled tube and the poor quality of manufacture, due to the low rigidity of the workpiece and the need to clean long chromo from burrs.

The aim of the invention is to improve the quality and reduce the complexity of the manufacture of tubes with internal fins.

To achieve this goal, a flat tape is used as a blank, which with and without tension

The ladders are wound on the mandrel, fastening both ends of it to the south, cutting multiple threads with a step corresponding to the helix of the tape winding onto the mandrel, then straightening the tape, bending them inwards until the edges come together and connecting these edges, for example, welding.

The drawing shows a diagram of the fastening of the tape on the mandrel.

A method of manufacturing a tube with internal fins is carried out in the following sequence.

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First, the tape 1 is cut off, then ... it is wound on the mandrel 2 with tension and without overlap. Two recesses 3 are made on the mandrel, orienting under the same 1 gg to the forming mandrel as the angle of the helix of the ribbon winding. Both ends of the tape are fastened with the help of bolts 4. Then, multiple thread are cut in increments corresponding to the step of the screw line winding the tape on the mandrel. After that, the tape is removed from the mandrel, bent with its protrusions inward until the edges join, and edges are joined, for example, in the armature.

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Claims (1)

The invention The method of manufacturing a pipe with internal fins, including cutting an external multiple thread on a thin-walled workpiece, followed by straightening it, bending it inwards to bring the edges together and connecting them, in order to improve quality and reduce labor intensity, as a blank, use a flat a tape that is wound on a mandrel along a tensioned and without an overlap, and the pitch of the thread being cut is chosen to correspond to the step of winding the tape on the mandrel. Sources of information taken into account in the examination 1. USSR author's certificate No. 502714, cl. B 23 B 1/00, 1974.