Method for machining large-helical-angle internal threaded pipe

Abstract

The invention discloses a method for machining a large-helical-angle internal threaded pipe. The method specifically comprises the following steps that 1, a threaded core head is assembled, specifically, a first bearing and a second bearing are embedded into the two ends of the threaded core head correspondingly; 2, a core rod is assembled, specifically, the threaded core head and a floating corewhich are assembled in the step 1 are fixed to the two ends of the core rod correspondingly; 3, a main pipe is assembled, specifically, the core rod assembled in the step 2 is arranged in a cavity ofthe main pipe; 4, a spinning device is assembled, specifically, the spinning device is formed by combining a steel ball and a spinning ring, and the steel ball is arranged in the spinning ring; 5, themain pipe assembled in the step 3 sequentially penetrates through a reducing die and the spinning device, and the threaded core head is located at the spinning position; and 6, drawing is started, and the threaded core head freely rotates in the advancing direction of a finished pipe under the auxiliary effect of the first bearing and the second bearing. The method for machining the large-helical-angle internal threaded pipe has the advantages of being high in production speed and high in product percent of pass.

Description

technical field [0001] The invention relates to the technical field of deep processing methods for nonferrous metals, in particular to a method for processing internally threaded pipes with a large helix angle. Background technique [0002] With the continuous improvement of national policies, the requirements for energy consumption standards of refrigeration equipment are getting higher and higher. As a main factor affecting the energy consumption of refrigeration equipment, internal threaded pipes will inevitably develop towards large helix angles. According to the traditional production method of internally threaded copper pipe processing, the increase of the helix angle will bring problems such as difficulty in tooth removal and large drawing resistance. Only by reducing the production speed can the product pass rate be guaranteed, which seriously restricts the production capacity of internally threaded pipe manufacturers. Production and processing efficiency. Contents...

AI Technical Summary

Problems solved by technology

According to the traditional production method of internally threaded copper pipe processing, the increase of the helix angle will bring problems such as difficulty in tooth removal and large drawing resistance. Only by reducing the production speed can the product pass rate be guaranteed, which seriously restricts the production capacity of internally threaded pipe manufacturers. Production and processing efficiency

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