Method for preparing high-efficiency explosive composite pipe based on water pressure in local vacuum environment

Abstract

The invention provides a method for preparing an efficient explosive composite pipe based on water pressure in a local vacuum environment. The method comprises the steps that metal pipes 1 and 2, pvc pipes 5-1 and 5-2 and metal pipes 3 and 4 are coaxially arranged from inside to outside; an explosive and a detonator are filled between the pvc tubes 5-1 and 5-2 to form an explosive device; sealing two ends of gaps between the metal pipes 1 and 2 and between the metal pipes 3 and 4, and vacuumizing to construct a local vacuum environment; filling water among the metal pipe 2, the metal pipe 3 and the explosive device to construct a water environment; and the explosion device is detonated according to requirements, so that all the metal pipes are welded and combined with one another, and two groups of high-quality explosion composite pipes with different pipe diameters are obtained. According to the preparation method of the explosive composite pipe, the phenomenon that the bonding interface of the metal pipe is locally melted due to an air layer is eradicated, the utilization rate of the explosive is increased, burning damage to the surface of the metal pipe due to high temperature of the explosive is relieved, and the problem that high-quality machining of a thin-wall material cannot be achieved through a traditional method is effectively solved.

Description

technical field [0001] The invention belongs to the field of explosive welding and relates to a method for preparing a high-efficiency explosive composite pipe based on water pressure in a partial vacuum environment. Background technique [0002] In today's industrial production, a single metal material can no longer meet the requirements for the mechanical and chemical properties of the material, and multi-metal composite materials have gradually occupied an irreplaceable part in the industry. The so-called multi-metal composite material refers to a composite material made of two or more different metals, which also has the mechanical and chemical properties of the raw material. As one of the commonly used multi-metal composite pipe preparation methods, explosive welding is a relatively advanced composite metal welding process. The substrate tubes collide with each other at high speed to bond the metal materials to each other. [0003] The biggest feature of explosive wel...

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Problems solved by technology

In traditional explosive welding, most of the explosives are directly attached to the surface of the metal pipe, which often causes ablation damage to the surface of the composite material due to the high temperature at the moment of explosive explosion, which seriously affects the appearance quality of the product.

In addition, the traditional explosive welding method is difficult to weld thin-walled pipes in the production process. The size of metal pipes cannot be adjusted freely according to needs, and the overall operability is low.

During the explosive welding process, the residual air in the gap between the composite pipe and the base pipe is difficult to discharge in time. On the one hand, this will reduce the bonding quality of the metal pipe, and on the other hand, it may cause the loss of bonding ability between the base pipe and the composite pipe. problem that cannot be ignored

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