A fuel rod automatic compression spring device

Abstract

The invention relates to the technical field of fuel component manufacturing, in particular to an automatic fuel rod spring compressing device and an automatic fuel rod spring compressing method. The automatic fuel rod spring compressing device comprises a length testing mechanism, a spring compressing mechanism, a substrate, a guide sleeve and a connecting handle, wherein the spring compressing mechanism is fixedly connected with the length testing mechanism through the connecting handle; the spring compressing mechanism and the length testing mechanism are arranged on the substrate; the guide sleeve is arranged on the substrate; the guide sleeve is used for fixing and limiting the spring compressing mechanism and the length testing mechanism. The automatic fuel rod spring compressing method comprises the following steps: measuring displacement of a core block by using the length testing mechanism, further measuring pretightening force to the core block, compressing a spring into a fuel rod casing by using the spring compressing mechanism, tightly compressing the spring, and simultaneously measuring the compression intensity of the spring and the pretightening force to the spring. By adopting the device and the method, the productivity and the product quality level are greatly increased, the rejection rate of compressed springs is reduced to be approximate to 0, meanwhile the spring compression operation process is simplified, and the working intensity of operators is alleviated.

Description

technical field [0001] The invention relates to the technical field of fuel assembly manufacturing, in particular to a fuel rod automatic compression spring device and a fuel rod automatic compression spring method. Background technique [0002] The existing fuel rod compression spring device needs to be completed when compressing the spring: manually put the spring into the rotating disk → the probe rod presses the core block → measure the origin → the probe rod withdraws → the rotating disk rotates → the probe rod is pushed into the spring → 100% by a special person Manual adjustment and inspection. The whole process is time-consuming and cumbersome. Moreover, when the "probing rod is pushed into the spring", the centering performance is not good due to the defect in the machining accuracy of the spring positioning rotating disc. If the spring hole cannot be accurately controlled to the position of the axial centerline of the spring device, it is easy to be biased. The s...

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Problems solved by technology

[0006] In view of the above prior art, the present invention provides an automatic fuel rod compression spring device to solve the problems of low production efficiency and unstable product quality in the prior art.

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