回旋加速器主磁铁镶条再加工工艺研究  

Study on reprocessing technology of main magnet shimming rlock of cyclotron

作　　者：凌丽 王飞[1] 邢建升[1] 边天剑 陆锦荣 安世忠[1] LING Li;WANG Fei;XING Jiansheng;BIAN Tianjian;LU Jinrong;AN Shizhong(China Institute of Atomic Energy,Beijing 102413,CHN)

机构地区：[1]中国原子能科学研究院,北京102413

出　　处：《制造技术与机床》2024年第7期139-143,共5页Manufacturing Technology & Machine Tool

基　　金：国家自然科学基金青年基金(12105370);中核集团“青年英才”项目(FY212406000404)。

摘　　要：回旋加速器主磁场测量与垫补是回旋加速器技术研究的一个重要方向。为实现回旋加速器主磁场垫补理论要求,其垫补方式可采用边缘垫补方式。该方式要求加工的镶条边缘曲线的精度优于0.02 mm。然而,镶条初次加工方式为配做形式,本身镶条材料硬度低、形状薄且长,在强磁场条件下,细微扰动就会引起磁场剧烈变化,实际需要进行垫补加工量非常小。故保证镶条边缘曲线再加工精度是实现回旋加速器功能非常重要的工作。文章从边缘理论曲线获得方式出发,提出加工精度具体要求和边缘曲线加工的实现方式,并考虑其坐标系关系,设计了一种保证镶条边缘曲线再加工精度的工装。该工装可同时固定两根镶条,提供合适的参考点,实现镶条在加速器上的位置复现。该工装应用于16 Mev加速器镶条垫补加工,每次垫补结果机械测量误差在0.02 mm,磁场复测后实际加工磁场与理论垫补磁场精度好于10-3。The mapping and shimming of cyclotron's main magnetic field is an important direction of cyclotron technology research.In order to meet the theoretical requirements of the cyclotron's main magnetic field shimming,the edge shimming method adopted requires high precision in the reprocessing of the main magnet shimming.However,due to the fact that the primary processing method of the insert is the form of matching,the material of the shimming block itself is low in hardness,thin and long in shape,and under the condition of strong magnetic field,the actual amount of shimming processing is very small,and slight disturbance will cause drastic changes in the magnetic field,so it is very important to ensure the precision of the re-processing of the insert to realize the function of the cyclotron.Based on the way of obtaining the theoretical edge curve,the machining accuracy mapping and the actual machining method of the edge curve are put forward,and considering the coordinate system relationship,a fixture is designed to ensure the machining accuracy of the shimming block,which can fix two shimming blocks at the same time and provide a suitable reference point to realize the position reproduction of the shimming block on the accelerator.The tool is applied to the shimming processing of 16 Mev cyclotron.The mechanical measurement error of each shimming result is 0.02 mm,and the accuracy of the actual processing magnetic field and the theoretical padding magnetic field is better than 10~(-3) after magnetic field retest.

关 键 词：回旋加速器 磁场垫补 工装装置 装配工艺 

分 类 号：TH162[机械工程—机械制造及自动化]