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Machining method for metal pipes

A processing method and metal pipe technology, applied in the field of metal pipe processing, can solve the problems of small seamless pipe diameter, complicated processing procedure, high production cost, etc., and achieve the effect of low production cost, simple processing procedure and high yield

Inactive Publication Date: 2017-03-08
江松伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, metal pipes can be divided into welded pipes and seamless pipes according to different processing methods. Among them, welded pipes are made by bending metal plates into circular arcs, and then welding the plates end to end to form pipes. Pipes made by welded pipe technology usually have thinner pipe walls; When making seamless pipes, rolling, forging, extrusion, machining, and deep hole drilling are generally used. The seamless pipes manufactured by deformation processing and machining first need to melt the metal raw materials into metal ingots, and then The metal ingot is forged into a metal rod, and then deformed into a seamless tube billet. The processed seamless tube has a small diameter, and the processing procedure is complicated, time-consuming, energy-consuming, low-yield, and high-production costs.

Method used

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  • Machining method for metal pipes

Examples

Experimental program
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Effect test

Embodiment 1

[0024] like figure 1 , figure 2 and image 3 Shown is a first specific embodiment of a method for processing metal pipes, the method comprising the following steps:

[0025] In step 1, two sheets of metal plates are respectively rolled into a cylindrical tube body 1, and the joint of the tube body 1 is welded and connected to form a weld 2, wherein one tube body 1 is used as the outer tube body, and the other tube body 1 is used as the inner tube body, The inner diameter of the outer tube body is slightly larger than the outer diameter of the inner tube body, and the smaller the gap between the inner and outer tube bodies, the better;

[0026] Step 2, the two pipe bodies 1 are coaxially nested, and the welding seams 2 on the side walls of the two pipe bodies 1 are staggered by 180 degrees from each other;

[0027] Step 3: Evacuate the gap between the two layers of tube bodies 1, and weld and seal the gap between the two ends of the tube body 1, so that the gap forms a clos...

Embodiment 3

[0034] like figure 1 , figure 2 and Figure 5 Shown is the third specific embodiment of the processing method for metal pipes, which is basically the same as Example 1, except that a four-layer pipe body 1 is prepared, and the welding seam 2 on the side wall of the pipe body 1 is spaced apart 90°.

[0035] Of course, when the multi-layer pipe bodies are nested, the staggered angle between the welds of different pipe bodies can also be 1°, 2°, etc.

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Abstract

The invention discloses a machining method for metal pipes. The machining method comprises the following steps that firstly, sheet metal is rolled into tubular pipe bodies, and welding connecting at the pipe body joint positions is conducted; secondly, at least two layers of pipe bodies are coaxially arranged in a nested manner, and weld seams on the side walls of the pipe bodies are mutually staggered by a set angle; thirdly, gaps among multiple layers of the pipe bodies are vacuumized, the gaps of the two ends of the pipe bodies are welded and sealed, and the gaps form sealed vacuum thin layers; and fourthly, the pipe bodies are subjected to hot-rolling forming or cold-rolling annealing. The machining method has the beneficial effects that the pipe machining processes are simple, the pipe side wall structure strength is high, the yield is high, and the production cost is low; and most of all, seamless metal pipes with the large pipe opening diameter can be produced, and the product blank in the market is filled.

Description

technical field [0001] The invention relates to a processing method of metal pipes. Background technique [0002] At present, metal pipes can be divided into welded pipes and seamless pipes according to different processing methods. Among them, welded pipes are made by bending metal sheets into circular arcs, and then welding the sheets end to end to form pipes. Pipes made by welded pipe technology usually have thinner walls; When making seamless pipes, the processing methods of rolling, forging, extrusion, machining, and deep hole drilling are generally used. For seamless pipes manufactured by deformation processing and machining, metal raw materials need to be smelted into metal ingots, and then The metal ingot is forged into a metal bar, and then deformed into a seamless tube blank. The processed seamless tube has a small diameter, and the processing procedures are complex, which consumes energy and consumes energy. The yield is low, and the production cost is high. SUM...

Claims

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Application Information

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IPC IPC(8): B21C37/08
CPCB21C37/08
Inventor 江松伟
Owner 江松伟
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