Automatic cutting machine for outer curled edges of polyethylene pipes

Abstract

The invention relates to an automatic cutting device, which aims to provide an automatic cutting machine for outer curled edges of hot-melt butt joints of polyethylene pipes. The device is provided with a base, wherein a shell is arranged on the base; an opening at the front end of the base is provided with a cutter; the cutter is a multi-tooth saw blade which is connected to a transmission shaftof a first motor through a linkage-slider transmission device arranged in the shell; a second motor is also arranged in the shell and is connected to a cone gear through the transmission shaft; the cone gear and a cylindrical spur gear share one rotating shaft; two ends of the rotating shaft are arranged on two sides of the shell and are arranged to be parallel to the cutter; a guiding groove perpendicular to the rotating shaft is arranged below the cylindrical spur gear; and one end of the guiding groove extends to the position of the cutter. Compared with the prior art, the machine has significant advantages in not only operation but also the quality of removing curled edges.

Description

technical field [0001] The invention relates to an automatic cutting device. More specifically, the invention relates to an automatic cutting machine for outer crimping of polyethylene pipe hot-melt butt joints. Background technique [0002] Hot-melt butt welding is one of the most commonly used connection methods for polyethylene pipes. Due to its low connection cost, superior mechanical properties of welded joints, and good sealing, it is widely used in municipal projects such as gas transmission and water supply. Many researchers at home and abroad have confirmed that curling is an important factor affecting the life of hot-melt butt joints through rapid tensile tests, long-term high-temperature hydrostatic tests, high-temperature creep tensile rupture tests, and creep tensile tests. In addition, during the laying and acceptance of polyethylene gas pipelines, it is necessary to remove the outer crimp for back bending test to identify the welding condition. [0003] At p...

AI Technical Summary

Problems solved by technology

[0003] At present, the tool used for removing the outer crimping is a manual cutter, which needs to be pressed firmly against the pipe wall, and at the same time, the connecting rod must be manually rotated. Excision is very difficult

Its cutting quality is unstable, the removed curling is not uniform, the outer curling is difficult to be removed as a whole, unevenness often appears on the outer wall surface of the pipe, and there is residual curling on the joint

According to the survey, the actual operation of manual removal of the outer curl often requires two operators to work together, wasting a lot of human resources, and the quality of the removal cannot be guaranteed

At present, there are no reports on the development of related automatic outer curling cutting devices at home and abroad.

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