Design method of corrugating mould of copper pipe with fine pitch and deep helical corrugation

Abstract

The invention relates to a processing mould of an outer conductor of a coaxial cable corrugation copper pipe, in particular to a corrugating mould for continuously rolling a copper pipe with a thin wall into a copper pipe with a fine pitch and a deep helical corrugation. The technical problem to be solved is to provide a design method of a corrugating mould of a copper pipe with a fine pitch and a deep helical corrugation, so as to be suitable for the corrugating requirement of the copper pipe with a fine pitch and a deep helical corrugation. The design method is characterized in that the mould is a gradually varied helical angle helical corrugation mould. By the method, a traditional internal thread with invariable helical angle is changed into an internal thread with a helical angle gradually diminishes so that the mould generates an opposite force to ensure that the rolled corrugation is compressed in the axial direction of the copper pipe, thereby reducing the pitch and increasing the depth. Therefore, the design method can be successfully used for processing a radio-frequency cable of the outer conductor of the copper pipe with a fine pitch and a deep helical corrugation.

Description

Technical field: [0001] The invention relates to a processing die for the outer conductor of a coaxial cable corrugated copper tube; in particular, it relates to an embossing die for continuously rolling a thin-walled copper tube into a small-pitch deep spiral corrugated copper tube. Background technique: [0002] As the outer conductor of the semi-rigid coaxial radio frequency cable, the spiral corrugated copper tube is an ideal structural form. It has excellent electrical properties such as low loss, small standing wave, phase consistency, and good shielding performance. It also has high mechanical strength. , Moderate flexibility and other excellent mechanical properties, so this structure is widely used. In order to further improve its flexibility, it is necessary to reduce the pitch of the thread and increase the depth of the thread, which puts forward new requirements for the design of the embossing die. [0003] Spiral corrugated copper tubes are generally formed by ...

AI Technical Summary

Problems solved by technology

However, due to the influence of various factors such as the size of the casing hole and the surface roughness of the inner hole, the performance and amount of lubricating oil, and the flexibility of the cable core in the copper tube, the friction force is extremely difficult to control, so the rolled corrugated shape is difficult. to achieve uniformity, which limits the application of this method

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