Method of manufacture of high-pressure cylinders

FIELD: plastic metal working.

SUBSTANCE: invention relates to methods of manufacture of high-pressure cylinders, such as fire extinguisher cylinders. According to proposed method, thick-walled cylindrical tube blank of required length is cut off, blind bottom plate and bottom plate with neck for connecting shutoff valve are fitted relative to edges of tube blank, bottoms are upset from both sides in tube cylindrical blank to form lock joints and to provide adequate sealing of joints. Prior to fitting of bottoms relative to edges of blacks inner diameter of tube cylindrical blank is calibrated and blank is subjected to cold rolling with thinning out by reverse rotary drawing over entire length of cylindrical tube blank. Upsetting into lock joint of blind bottom plate and bottom plate with neck in tube cylindrical blank is carried out in succession from each side of blank. After cutting off of cylindrical tube blank, cleaning of blank from scale and rust is carried out. After rolling of cylindrical tube blank, it is subjected to turning in lathe to remove head.

EFFECT: improved quality of article owing to higher accuracy of manufacture, reduced cost of articles owing to reduction of material usage.

3 cl, 4 dwg

 

The invention relates to the processing of metals by pressure, and in particular to methods of manufacturing high-pressure cylinders, and can be used for the manufacture of cylinders fire extinguishers.

A known method of manufacturing thin-walled cylinders, including deformation by thinning the wall of the thick-walled tubular workpiece, cutting it to length process, heating one end of the gauge of the workpiece and forming it in the bottom, heat the undeformed end of the gauge of the workpiece and forming in his throat, and first perform cutting thick-walled tubular workpiece deformation with the thinning of the walls are the length of the cylindrical part of the container after formation of the bottom at the end of the gauge of the workpiece (refer to as. the USSR №1696066, IPC521D 51/24, publ. 07.12.1991).

The disadvantages of this method are low productivity and very energy intensive processes forming the bottom and neckline, which also require the use of powerful special technological equipment. In addition, unnecessary layer of metal left on the bottoms, (when forming the bottoms by means of hot sealing, the thickness of the metal increases and reaches the desired, from the viewpoint of strength, the thickness leads to unnecessary increase in the weight of the container and the waste of material.

The known method of manufacture is the service of high-pressure cylinders, including the segment of tubular cylindrical workpiece, the orientation of the bushings (bottoms) from the edge of the billet and the fixing (securing) in the neck and the bottom of the container, followed by sealing of the joint, and after orientation the first bushing (bottom) inside the tubular billet is placed second sleeve (for example, the bottom of the neck to attach the shut-off valves), fixing the first sleeve (bottom), the formation of a neck of the container below the second sleeve (bottom) are performed simultaneously, and then move the second sleeve (bottom) up to the stop in the inner surface of the neck of the container with a force equal to the test pressure in the cylinder with the help of a special spacer device (see the description of the patent RF №2198331, IPC7F16J 12/00, F17 1/00, 21D 51/24, publ. 10.02.2003,).

The disadvantages of this method are the following: - the use of a tubular workpiece without additional processing leads to an increase in weight of the products in General (due to the large tolerances on the wall thickness of tubular cylindrical billet is necessary to use a tube with a greater wall thickness) and, consequently, waste of material; a first crimping sleeve (bottom) and the simultaneous formation of the neck under the second sleeve (bottom) it is possible to carry out the manufacture of products with a diameter of 150 mm and a length of 600 mm, in case of exceeding these dimensions such operation is not on udaetsya due to the properties of the metal; - moving sleeve (bottom) inside the product with a force equal to the test pressure (for most tanks is 225 kg/cm2), manually impossible and requires, in addition to the known spacer device, a special actuator. All of the above disadvantages lead to the increase in the cost of the container.

The task and the technical result of the invention is to improve product quality by improving precision and reducing the cost by reducing material consumption.

This technical result is achieved in that in the method of manufacturing a high-pressure cylinders, including a section of thick-walled cylindrical pipe procurement, installation deaf fixed plate and fixed plate with an orifice for connection of valves relative to the edges of the billet, the crimp in the interlocking connection of the cage bottoms on both sides of pipe in a cylindrical workpiece and sealing joints, prior to the installation of the heads relative to the edges of the workpiece to produce the calibration of the internal diameter of the tubular cylindrical workpiece and cold rolling with a reduction by the method of reverse rotation of the hood over the entire length of tubular cylindrical workpiece, thus crimping the castle compound deaf fixed bottom and bottom with an orifice in the pipe a cylindrical workpiece p is izvodyat in series with each side of the workpiece.

In addition, after cutting the pipe cylindrical billet produce purification from scale and rust.

In addition, after rolling tubular cylindrical billet produce turning machining with the removal of profit.

The claimed method is illustrated by drawings, where figure 1-4 shows the operation of manufacturing high-pressure cylinders.

The claimed method is implemented as follows.

First, a thick-walled cylindrical tube cut-to-length harvesting 1 (1), clean the workpiece from scale and rust and produce the calibration of the internal diameter of the workpiece to the desired size (not shown). Then produce cold rolling pipe cylindrical workpiece with thinning method reverse rotation of the hood (figure 2). After installation of one of the bottoms from the edge of the tubular cylindrical billet produce the crimped end of the pipe has a cylindrical workpiece in a scarf joint at the beginning of one of the bottom 2, and then the second plate 3 (Fig 3, 4).

The claimed method can improve the quality of manufacturing of cylinders, to improve the manufacturability of the cylinders and to reduce the cost of products.

1. A method of manufacturing a high-pressure cylinders, including a section of thick-walled cylindrical pipe procurement, installation deaf fixed bottom and laying the bottom of the neck is to blame for connection of valves relative to the edges of the billet, crimping in interlocking connection of the cage bottoms on both sides of pipe in the cylindrical workpiece and the sealing of the joints, characterized in that prior to the installation of the heads relative to the edges of the workpiece to produce the calibration of the internal diameter of the tubular cylindrical workpiece and cold rolling with a reduction by the method of reverse rotation of the hood over the entire length of tubular cylindrical workpiece, thus crimping the castle compound deaf fixed bottom and bottom with an orifice in the tubular cylindrical billet is produced in series with each side of the workpiece.

2. The method according to claim 1, characterized in that after cutting the pipe cylindrical billet produce purification from scale and rust.

3. The method according to claim 1, characterized in that after rolling the tube cylindrical billet produce turning machining with the removal of profit.



 

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