A manufacturing process of explosive composite pipe with negative pressure cavity based on liquid explosive

Abstract

The invention provides a liquid explosive-based explosive composite pipe manufacturing process with a negative pressure cavity, which includes: coaxially installing the cladding pipe and the base pipe on the soft base from the inside to the outside, and according to the Calculate the amount of explosives according to the specifications, and install the inner tube to adjust the water column, use the sealing ring to seal the upper end of the annular cylindrical gap between the covering pipe and the base pipe, and use a vacuum pump to pump the annular cylindrical cavity into a negative pressure and seal it , place the assembled tube blank coaxially with the container and inject liquid explosives, and detonate the explosives to obtain metal composite tubes. The invention can greatly improve the production efficiency; the charge is uniform, the combination rate of the composite pipe is high, the welding quality is good, no constraint mold is required during the welding process, the production cost can be greatly reduced, and the circular cylindrical cavity is pumped into a vacuum pump. Negative pressure greatly reduces the influence of air on explosive welding, which not only improves the bonding quality of composite pipes, but also reduces the amount of explosives used.

Description

technical field [0001] The invention belongs to the field of explosive welding, and relates to a manufacturing process of an explosive composite pipe with a negative pressure cavity based on liquid explosives. Background technique [0002] Explosive welding technology is a welding method that uses the energy generated by the instantaneous explosion of explosives to make the cladding material collide with the base material at high speed, thereby achieving a metallurgical bond between the metal surfaces to be welded. It is usually used for welding between metal materials with large differences in physical and chemical properties. Metal explosive composite pipes are widely used in petroleum, chemical, aerospace and other fields. Existing explosive clad pipes are mainly formed by coiling and welding explosive clad plates. However, for some small-diameter composite pipes, it is difficult for welding equipment to achieve internal and external layered welding, and the formed comp...

AI Technical Summary

Problems solved by technology

Small-diameter composite pipes need to be obtained through continuous drawing of medium and large-diameter composite pipes, and the drawing process often causes metal peeling and delamination

Explosive welding directly using small-diameter metal round pipes has problems such as difficulty in charging and uneven charging

In addition, in order to obtain a composite pipe with higher bonding strength, it is usually necessary to impose strong constraints on the outside of the base pipe, usually steel molds and serious wear and tear, which greatly increases the cost of explosive welding

The traditional explosive welding process of metal circular tubes cannot completely remove the air between the base and the cladding tube, which makes the composite tube bulge, resulting in problems such as low bonding rate and low bonding strength.

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