水室封头材料加工切削力试验及预测模型研究

Experimental Study and Prediction Model for Cutting Force in Machining Water Chamber Head Material

水室封头作为核电设备的主要零部件,长期处在高温、高压、高辐射等恶劣的工作环境下,材料为高强度钢508Ⅲ钢,具备高强度和高温的力学特性,导致其切削加工性差。在水室封头重型切削加工过程中,大多采用硬质合金刀具进行切削,铣削过程中刀具受到较大的机械冲击和温度影响。针对切削过程中刀具失效严重、换刀频繁等问题,进行水室封头材料加工切削力试验及预测模型研究。通过对水室封头材料进行单因素铣削试验,探讨切削用量与切削力的关系;进而采用正交试验的方法分析切削参数对切削力影响的显著程度,应用回归分析方法建立切削力预测模型,并进行验证。研究结果为进一步研究水室封头材料加工刀具失效机理、切削参数优化及刀具设计开发提供一定的试验基础和技术支持。

As the main parts of nuclear power equipment,the water chamber head has been working under the harsh environment of high temperature,high pressure and high radiation for a long time.The material is high strength steel 508Ⅲ,which has high strength and high temperature mechanical properties,resulting in poor machinability.In the heavy-duty cutting process of water chamber head,the carbide cutters are mostly used for cutting,and the cutters are affected by mechanical impact and temperature.Aiming at the problems of severe tool failure and frequent tool change in cutting process,the cutting force experiment and prediction model of water chamber head material machining are studied.Firstly,the relationship between the cutting parameters and the cutting force is discussed through single factor milling experiment with water chamber head material,and then the significant degree of cutting parameters′ influence on the cutting force is analyzed by orthogonal experiment,and the prediction model for the cutting force is established by regression analysis method and verified.The research results provide some experimental basis and technical support for further research on tool failure mechanism,cutting parameters optimization and tool design and development of chamber head materials.