Preparation method of seamless high-pressure gas cylinder and gas cylinder

Abstract

The invention relates to a preparation method of a seamless high-pressure gas cylinder. The preparation method comprises the following steps of 1, preparing a blank; 2, extruding the blank reversely to machine a rough tube blank; 3, carrying out precision forging and tube drawing to form a precision forging tube blank; 4, carrying out heat treatment on the precision forging tube blank; 5, carryingout spinning to prepare a tube, reducting the thickness of the tube blank subjected to precision forging to a required thickness by thickness reduction spinning equipment, forming the tube, and preparing annular reinforcing ribs integrally formed with the tube on the inner wall of the tube through spinning; and 6, sealing the opening by hot spinning, and preparing the gas cylinder. The inventionfurther relates to the seamless high-pressure gas cylinder prepared by the method, the inner wall of the gas cylinder is provided with the integrally-formed annular reinforcing ribs, so that the pressure-bearing capacity of the tube is improved, and the tube is attractive in appearance and easy to install; and materials are saved, the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a gas cylinder and the gas cylinder, in particular to a preparation method of a seamless high-pressure gas cylinder and the gas cylinder. Background technique [0002] Titanium and titanium alloys are widely used in aviation, aerospace, navigation, petroleum, chemical, medical and other fields due to their excellent comprehensive properties such as low density, high specific strength, high temperature resistance, corrosion resistance, non-magnetic properties, and good biocompatibility. Applications. In the past, high-pressure gas cylinders for submarines were made of steel. With the advancement of technology, titanium alloys began to enter the field of gas cylinders for submarines due to their special advantages. The new generation of titanium alloy gas cylinders for submarines has put forward higher requirements in terms of performance and capacity. , it is required to meet the pressure design requirem...

AI Technical Summary

Problems solved by technology

[0003] Existing seamless titanium alloy tubes are generally produced by hot rolling or cold drawing, and hot rolling is used to prepare seamless titanium tubes, especially seamless titanium tubes with a diameter greater than 200mm, which have uneven wall thickness and low yield , and due to the existence of air-permeable layers on the inner and outer surfaces, the quality of the inner and outer surfaces is poor and there are many defects, especially the defects on the inner surface are difficult to remove; the process of cold-drawing titanium tubes is complicated, the cost is high, and the output is low

[0004] Whether it is cold drawn or hot rolled, the produced pipe fittings have no inner ribs, which are the reinforcing ribs on the inner wall of the pipe fittings. On the premise that a certain pressure bearing capacity can be achieved, it will inevitably lead to a relatively large wall thickness of the pipe fittings, while the existing technology Among them, there is no method for preparing pipe fittings with inner ribs; the following two methods are easy to think of to prepare seamless pipe fittings with inner ribs: one is to directly weld the inner ribs on the inner wall of the pipe fittings, but welding is easy to cause deformation of the material, Affect the pressure bearing capacity of the material, the welding process is complicated, the equipment requirements are high, and the investment cost is relatively high; the second is to use machining to mill off the excess material on the inner wall of the pipe to form inner ribs. This method is a serious waste of materials and high cost , and for pipe fittings with larger diameters, machining equipment is difficult to achieve

[0005] In the prior art, there is a design with a ring-shaped reinforcing rib on the outer wall of the pipe fitting. Generally, the method of machining is used to form the outer ring-shaped reinforcing rib. Although the ring-shaped reinforcing rib made by this method can also enhance the pressure bearing capacity of the pipe fitting effect, but it will affect the appearance and installation requirements of the pipe fittings, and the excess material is removed by machining to form an external ring rib, which wastes material. Even if the removed material can be recycled, recycling will still require a lot of waste

Images