A kind of metal pipe stretching method

Abstract

A metal pipe stretching method, including the steps of rough stretching of the metal pipe, closure of the metal pipe, fine stretching of the metal pipe, cutting of the metal pipe to form a pipe, etc. During the fine stretching, the metal pipe is sent to a precision pipe drawing machine, and the pipe drawing machine The stretching device is set on the transmission chain, specifically a cam trolley, with a cam groove in the center, a cam in the cam groove, and a clamp block for clamping the processing material on the rear side of the cam. Clamp when the cam moves forward, and loosen when the cam moves backward; the rough stretching of the present invention can meet the same quality requirements as straight pipe stretching, and there is usually no need to monitor the processing status frequently after feeding, and the equipment will automatically stop running and prompt , the fine stretching device is simple and convenient, which not only greatly saves energy consumption, but also improves work efficiency; in addition, the cutting device used for cutting metal pipes is driven by motors and cylinders, and can process multiple sets of metal pipes at one time. Higher efficiency, lower cost, and easier maintenance.

Description

technical field [0001] The invention relates to the field of metal pipe manufacturing, in particular to a metal pipe stretching method. Background technique [0002] At present, metal pipes are roughly divided into two processing methods: one is rolling, which is processed step by step through a rolling mill; the other is pipe drawing, which processes the pipe step by step through a drawing machine. The advantage of rolled pipe is that the quality of the inner and outer surfaces is high, and the mechanical properties are stable after solid solution treatment; the disadvantage is that the size of the rolled pipe is difficult to make too small, usually it is difficult to achieve a capillary below 6mm, and the other is the quality of the rolled pipe. The precision is low. For example, the outer diameter is 6mm, and the corresponding tolerance is difficult to control within ±0.02mm. In addition, the rolling efficiency is low, and the production cycle is long. The advantage of t...

AI Technical Summary

Problems solved by technology

In addition to the fact that the size can be made very long, the biggest advantage of this type of processing method is that it can be actually automated and the efficiency is very high. This type of pipe has passed a certain pressure test and is usually used in shipbuilding, oil circuits, heaters, medical needles, etc. In industries with low dimensional accuracy requirements, but because of its low accuracy, especially the low dimensional accuracy of the inner diameter and the poor quality of the inner surface, it has not been able to be used in more precise fields, such as optical communications, glass packaging, aerospace, etc.

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