切削刃几何形状、工件硬度、进料率和切削速度对H13 钢精加工表面粗糙度和力的影响(中文4800字,英文4600字)
EFFECTS OF CUTTING EDGE GEOMETRY,WORKPIECE HARDNESS，FEED RATE AND CUTTING SPEED ON SURFACE ROUGHNESS AND FORCES IN FINISH TURNING OF HARDENED AISI H13 STEEL
摘要
本文对H13钢的切削刃几何形状、工件硬度、进料速率和切削速度对表面粗糙度和合力的影响进行了实验研究。将四个因素(硬度、边缘几何、进给率和切削速度)进行二级分数实验，并进行方差统计分析。在硬车削试验中，测量了刀具力的三分量和加工表面的粗糙度。研究表明，工件硬度、切削刃几何尺寸、进料速率和切削速度对表面粗糙度的影响具有统计学意义。边缘几何和工件硬度、边缘几何和进给速率、切削速度和进给速率等两个因素相互作用的影响也显得尤为重要。尤其是减小半径、降低工件表面硬度可获得更好的表面粗糙度。尖端的几何形状、工件硬度和切削速度被视为最具影响力的构件。表面硬度较低、小半径的工件具有较低的边缘切向力和径向力。
EFFECTS OF CUTTING EDGE GEOMETRY,WORKPIECE HARDNESS, FEED RATE AND CUTTING SPEED ON SURFACE ROUGHNESS AND FORCES IN FINISH TURNING OF HARDENED AISI H13 STEEL
Tugrul Özel, Tsu-Kong Hsu, Erol Zeren
Department of Industrial and Systems Engineering Rutgers, The State University of New Jersey, New Jersey 08854 USA
Abstract
In this study, effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and resultant forces in the finish hard turning of AISI H13 steel were experimentally investigated. Cubic boron nitrite inserts with two distinct edge preparations and through-hardened AISI H-13 steel bars were used. Four factor (hardness, edge geometry, feed rate and cutting speed)- two level fractional experiments were conducted and statistical analysis of variance was performed. During hard turning experiments, three components of tool forces and roughness of the machined surface were measured. This study shows that the effects of workpiece hardness, cutting edge geometry, feed rate and cutting speed on surface roughness are statistically significant. The effects of two-factor interactions of the edge geometry and the workpiece hardness, the edge geometry and the feed rate, and the cutting speed and feed rate are also appeared to be important. Especially, small edge radius and lower workpiece surface hardness resulted in better surface roughness. Cutting edge geometry, workpiece hardness and cutting speed are found to be affecting force components. The lower workpiece surface hardness and small edge radius resulted in lower tangential and radial forces. |
