Isostatic interference fit joint

Abstract

The invention relates to a novel isostatic pressing interference fit joint in which the assembly chamber has two diameters, one is a part S1 and the other is a narrower part S2, the part S2 forms part of a cylinder, and the cylinder is composed of a plurality of cylinders with interference fit joints. As the assembly chamber must be loaded with a cylinder which is adapted to the S1 part and not adapted to the narrower S2 part, the cylinder has two diameters. Then, once the assembly chamber is closed, the pressure is increased, the diameter of the assembly chamber is increased, especially the diameter of the S2 part is increased, and when the pressure is released, the composite chamber enters and is assembled with the S2 part. In order to facilitate assembly, the assembly chamber is preferably operated vertically, the S1 part is located at the top, and when the pressure is increased, the composite air cylinder falls into the S2 part under the action of self weight. It is then detached, as a result of which the composite cylinder is in interference fit with the other cylinder, the other S2 part must be included in the assembly chamber for reuse.

Description

[0001] There are several ways to produce thick-walled cylinders made from several concentric cylinders joined by isostatic interference pressing in order to generate high pressure.

[0002] One method of producing composite cylinders is to use an assembly chamber, which is necessary to produce an interference fit by isostatic pressing to create an interference between the two cylinders at atmospheric pressure; but it is also possible to increase the diameter of at least one of the two cylinders, thereby forming a tubular chamber together with the auxiliary cylinder and eliminating the interference, and the tubular chamber increases its inner diameter under the pressure in the assembly chamber.

[0003] Invention CL202101788 shows a new method for manufacturing a composite cylinder or a high-pressure chamber for high-pressure pasteurization (HPP) of food; or for the production of high-pressure mechanical components (HIP) or for hydrogen storage.

[0004] This "Instruction Manual" relates to a "new type of assembly chamber" which does not require a tubular chamber for assembly. The new type of assembly chamber is an assembly chamber made of two consecutive parts S1 (larger diameter) and part S2 (smaller inner diameter) ( Fig.10 ), wherein after use, the assembly chamber loses part S2 and is placed outside the composite chamber according to the following steps:

[0005] In the assembly chamber section S1, the cylinder is placed in the section S2 with a smaller inner diameter ( Fig. 20 ); since the diameter of the cylinder is slightly larger than the inner diameter of part S2, the cylinder will not enter part S2; when the cylinder is placed in the new assembly chamber, as the pressure increases, the inner diameter of part S2 increases accordingly until the cylinder placed in part S1 can fit into that part.

[0006] When the pressure increases, the internal mechanism in the assembly chamber moves into the cylinder of part S2. One possibility is to place the assembly chamber in a vertical position, with S1 at the top; in this way, when the diameter of part S2 increases, the cylinder is displaced due to gravity.

[0007] Removal of pressure allows the cylinder to be assembled with the new assembly chamber in section S2 (see Fig.30 ), after the cylinder is disassembled, the composite chamber still has another cylinder and the rest of the assembly chamber that will need to be reassembled.

[0008] There must be a joining mechanism in the two parts of the new assembled chamber so that it can be easily cut or separated after use to provide a smaller half for the composite cylinder. The new assembled chamber is supported externally in the axial direction so that the chamber is not too stressed by pressure in the axial direction.

[0009] When making the cylinder, it is best to glue the cylinders together, especially the parts with smaller diameter and the parts of the short cylinder that will form the side covers to make up the chamber, or just leave the composite cylinder. Description of the drawings:

[0010] Fig.10 : Description of a new assembly chamber with two parts S1 and S2.

[0011] Fig. 20 : Assembly chamber with the cylinder to be assembled in part S1 under no pressure.

[0012] Fig.30 : Assembly chamber with the cylinder to be assembled in section S2, because the pressure increases and allows the cylinder to enter section S2.

Claims

1. An assembly chamber, in particular for injecting a fluid into it through any perforation and applying pressure thereto, characterized in that The assembly chamber is composed of at least two cylindrical parts S1 and S2 (11, 12), one of which is larger than the other or forms a slightly conical cylinder; two cylindrical covers (21, 22) of different sizes located at the ends of the assembly chamber; and a component (30) in the shape of a cylinder or a conical tube, when the assembly chamber is not pressurized, the component is assembled in the first part S1 and cannot be assembled in the second part S2.

2. The assembly room according to claim 1, characterized in that The assembly chamber or another chamber is loaded into a tube (30) having a size suitable for fitting in the first portion S1 of the assembly chamber but not suitable for fitting in the second portion S2, and the assembly chamber is then closed and placed in a vertical position in an unpressurized state; the pressure of the fluid entering the chamber is increased, causing the assembly chamber to expand or dilate, thereby slightly increasing its inner diameter; At this point, the tube (30) is now suitable for fitting in the second part S2 and falls due to gravity; the pressure is removed from the assembly chamber and the tube is firmly assembled with the second part S2 of the assembly chamber; the process can be repeated for other assembly chambers, increasing the assembled tubes and forming thick-walled tubes.

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