Clamping protection bushing of high-precision pipe for nuclear power and using method of clamping protection bushing

Abstract

The invention discloses a clamping protection bushing of a high-precision pipe for nuclear power. The clamping protection bushing comprises a working section and a non-working section which are integrally formed, wherein the working section and the non-working section are each of a hollow cylinder structure, the outer diameter of the working section is smaller than that of the non-working section, and the working section and the non-working section are coaxial and have the same inner diameter. In addition, the invention further discloses a using method of the clamping protection bushing of the high-precision pipe for nuclear power. The method comprises the steps that the protection bushing is inserted into a collet chuck of a numerical control lathe, then inserted into an air compression main shaft clamping base, inserted into the pipe and then clamped, and the pipe is machined. The protection bushing is composed of the working section and the non-working section which are integrally formed, the inner surface of the protection bushing makes direct contact with the high-precision pipe for nuclear power, the outer surface of the high-precision pipe for nuclear power is isolated from the clamping face of the collet chuck, the outer surface of the pipe is effectively protected, when the pipe is machined, the protection bushing is matched with the collet chuck for use, so that the pipe cannot be damaged at the clamping part.

Description

technical field [0001] The invention belongs to the technical field of fixtures for mechanical equipment, and in particular relates to a high-precision pipe clamping protection bush for nuclear power. Background technique [0002] High-precision pipes for nuclear power, such as zirconium alloy pipes, special stainless steel pipes, etc., are often used as structural parts and widely used in nuclear reactor cores due to their excellent physical and chemical properties, becoming the first protective barrier for safe operation of reactors. This type of pipe usually has extremely high requirements on straightness, surface quality, dimensional accuracy, end surface quality, and physical and chemical properties. A series of non-destructive testing, etc. The cut-to-length quality requirements of precision pipes for nuclear power are very strict, and the main quality requirements include: the cut-to-length process cannot cause the straightness of the pipe to decrease, the clamping p...

AI Technical Summary

Problems solved by technology

Although this method can stabilize the clamping force, as the clamping surface of the collet is naturally worn during use, the clamping force of the collet on the pipe will change accordingly, resulting in unqualified cutting quality; natural wear It is not easy to be found, which will increase the risk of product quality control; after the clamping surface is naturally worn, the collet can only be scrapped as a whole, and it can be solved by replacing it with a new collet

[0008] Although the above two methods can greatly reduce the quality risk caused by clamping to the pipe, the nature of the collet as a metal material cannot be changed, so the risk of unqualified pipe surface quality caused by clamping is inevitable

Images