摘要
以覆膜砂砂坯为研究对象,研究砂坯铣削深度、进给速度、主轴转速、切削宽度对铣削力的影响规律,利用正交实验和多元线性回归分析建立了最大铣削力的数学模型并对该模型进行了显著性检验。通过SEM电镜扫描铣削断裂断口,探讨了砂型铣削断裂的形成原因。试验表明:Z轴方向上最大铣削力随切削深度的增大显现上升的趋势,而随着主轴转速、进给速度、切削宽度的增加铣削力的变化幅度很小趋于平稳。砂坯铣削过程中断裂产生的原因主要是砂坯强度不均匀、铣削深度较大、主轴转速过大等。
With the blank of coated sand as research object, the influences of milling depth, milling breadth, feeding speed and cutting width on milling force were studied. Also, we set up the maximum mathematical model of the milling force through the orthogonal experiments and the multiple linear regression analysis, and did a significant test to this model as well. We observed the milling fracture morphology through the SEM and analyzed the cause of the sand milling fracture. The experiment shows that the maximum cutting force of the Z axis direction increases with the increase of cutting depth, but with the increase of spindle speed, feed rate, cutting width, the milling force is very small and stable. In the process of milling the sand blanks, the main reason of the fracture is that the uneven sand blanks strength, the deep milling force and the quickly feeding speed.
出处
《铸造》
CAS
CSCD
北大核心
2016年第3期228-232,236,共6页
Foundry
基金
江西省自然科学基金项目(20151BAB206039)
江西省科技攻关项目(20133BBE50025)
江西省教育厅科技落地计划项目(DB20130301)
关键词
覆膜砂
铣削力
数学模型
断口形貌
coated sand
milling force
mathematical model
fracture mo^hology
