法兰平面机加工的时机选择

Machining Time Selection of Crane Flange Plane

在大型吊机安装过程中,吊机法兰平面度会发生变化。常规做法是在吊机底座组件吊船装配焊接完成后,对吊机法兰平面进行机加工,以保证吊机法兰平面度符合设计要求。本文叙述了将吊机法兰平面机加工时机选择在吊机底座组件吊船装配焊接前进行的试验方法和过程。试验结果表明,在采用有效控制变形的吊装方案和焊接工艺条件下施工,吊机底座组件吊船装配焊接后,吊机法兰平面度变化很小,可以满足设计图纸要求,为后续安装回转平台节省了时间,缩短了吊机安装周期及避免了高空作业带来的安全风险,给船厂带来良好的经济效益。

In the installation process of large crane,the flatness of crane flange will change.The conventional practice is to machine the crane flange plane after the assembly and welding of the crane base assembly,so as to ensure that the flatness of the crane flange meets the requirements of the design drawing.This paper describes the test method and process of crane flange plane machining before crane base assembly and welding.The test results show that,under the conditions of lifting scheme and welding technology with effective deformation control,the flatness of the crane flange changes very little after the assembly and welding of the crane base assembly,which can meet the requirements of the design drawing.It saves time for the subsequent installation of the rotary platform,shortens the installation cycle of the crane and avoids the safety risks brought by aloft work,thus bringing good economic benefits to the shipyard.