CAJ | 학술논문

采用效率较高的定轴插铣方法对半开式整体叶轮进行粗加工,根据定轴插铣所切除的材料形状是不规则柱体的特点,将该一般柱体以若干假想半平面截取,建立了以刀位规划区域面积最大为优化目标的数学模型,并利用Matlab软件完成模型的求解,得到刀位规划区域面积最大时的刀轴方向.并给出了在流道轴盘和盖盘宽度相同处对流道进行分段的方法.对一轮毂直径为φ400mm、叶片个数为17,分3段规划刀位,数值仿真结果显示,根据流道宽度分段加工后残余高度最大值为8.34mm,材料去除比率达到66.67%,与在轴盘线、盖盘线等参数处分段相比,加工残余高度明显减小,表明所提方法是有效的.
채용효솔교고적정축삽선방법대반개식정체협륜진행조가공,근거정축삽선소절제적재료형상시불규칙주체적특점,장해일반주체이약간가상반평면절취,건립료이도위규화구역면적최대위우화목표적수학모형,병이용Matlab연건완성모형적구해,득도도위규화구역면적최대시적도축방향.병급출료재류도축반화개반관도상동처대류도진행분단적방법.대일륜곡직경위φ400mm、협편개수위17,분3단규화도위,수치방진결과현시,근거류도관도분단가공후잔여고도최대치위8.34mm,재료거제비솔체도66.67%,여재축반선、개반선등삼수처분단상비,가공잔여고도명현감소,표명소제방법시유효적.
In order to remove machining allowance quickly at the stage of rough machining of the impeller,the more efficient method of the plunge milling with fixed rotating axis was used.Due to the envelope surface of the tool as an irregular cylinder,an optimization model was established with the mode of cutting out the cylinder by a number of half-planes,whose optimal object was the maximal area of tool-path planning area.The best tool-axis direction was obtained by solving this optimization model with the Matlab software.And a method to divide the impeller channel,at the place of same width between the channel hub and shroud,was proposed.This method was used for a particular type of impeller.Taking an impeller as a case which the hub diameter is φ 400mm,blade is 17,3 section tool-path planning.The simulation results showed that,after segmental machining follow the channel width the maximum machining residual was reduced to 8.34mm,and the material removal rate increased to 66.67%.It proved that the proposed machining method of dividing the impeller channel at the place of same width between the channel hub and shroud to be more effective compared to dividing the impeller channel at the place of hub line and shroud line with same parameter.