Manufacturing method of long and thin seamless tubes

A seamless tube and thin technology, which is applied in the field of pipe fittings manufacturing method, can solve the problems of low production efficiency and inability to continuously produce tube blanks.

Inactive Publication Date: 2018-01-23
冯 一鸣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main purpose of the present invention is to provide a method for manufacturing seamless pipe without cutting off the material cake, so as to eliminate the problem of low production efficiency caused by the cutting operation of the prior art that causes the tube blank to be continuously produced

Method used

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  • Manufacturing method of long and thin seamless tubes
  • Manufacturing method of long and thin seamless tubes

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Embodiment Construction

[0050] First of all, it is explained that the present invention is a method for making long, thin and thin seamless pipes, and in the method of the present invention, it is necessary to cooperate with a pipe forming machine to complete all the processes, and in a preferred embodiment of the present invention , the pipe forming machine 1 includes a first mold 11, a second mold 12, a third mold 13 and a fourth mold 14, wherein the first mold 11 has a first through portion 111, and the first The through portion 111 accommodates a tube blank (not shown in the figure), and in this embodiment, the aforementioned tube blank is cut from a strip-shaped solid material of a disk element, but the tube blank The cutting part is often uneven, so when the tube blank is placed into the first through portion 111 of the first mold 11, the tube blank in the first through portion 111 often protrudes from the outside. In this regard, a first upper punch 112 and a first lower punch 113 are provided...

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Abstract

A manufacturing method of long and thin seamless tubes at least comprises the following steps that (a) a tube blank is provided; (b) the tube blank is stamped, and at least one end of the tube blank is provided with a center point; (c) the tube blank is extruded so as to form a U-shaped tube blank; and (d) the at least two tube blanks in the step (c) are sequentially put into a mold with communicating portions different in hole diameter, the tube blank put in the communicating portion with the larger hole diameter is extruded forwards, and the other tube blank is forwards extruded towards thecommunicating portion with the smaller hole diameter for continuous forming. Thus, by means of the above steps of the manufacturing method, the long and thin seamless tubes can be continuously manufactured.

Description

technical field [0001] The invention relates to a method for manufacturing pipe fittings, in particular to a method capable of continuously producing long, thin and thin seamless pipes. Background technique [0002] At present, there are two main methods of making seamless pipes: the first method is to heat the thick and short solid tube embryos to 1200-1250°C, and then send them to a punching machine, and use the punching machine to punch the solid tube embryos. A hole is drilled on the top, and then sent to a multi-seat mandrel rolling mill, so as to reduce the outer diameter of the hollow tube blank and increase the hole diameter at the same time, so that the tube wall thickness of the tube blank is reduced and the length is increased. Continue, the newly formed The hollow tube embryo is sent to a heating furnace for heating, and after being resized by a full-diameter rolling mill, it is heated and sent to a stretching tube machine to make a seamless tube with a smaller a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C37/06B21C23/18
Inventor 冯一鸣
Owner 冯 一鸣
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