N-006 N-007 铣刀的切削参数(1) Cutting conditions of End Mill (1) ■ 切削速度 vc(m/min) Cutting speed vc 切削速度会因铣刀的材质、外径、刃长、颈长、加工材料、使用机床、刀柄刚性、加工形状、精度、切削 油等不同而存在差异,大致可参考铣刀的材质和加工材料的种类如表1所示。 Appropriate Cutting speed should be decided by parameters such as tool material, diameter, length of cut, work material, cutting machine, rigidity of tool holder, machining configuration, accuracy, cutting fluid, and etc. Generally tool material and work material are main factors to determine the Cutting speed. ■ 每刃进给量 fz(mm/tooth) Feed per tooth fz 进给速度在考虑加工效率时是重要的因素之一,虽然决定其进给速度的每刃进给量因铣刀的外径、形状、 加工材料、使用机床、刀柄刚性、加工形状、精度、切深量不同而存在差异,短刃造型铣刀的外径和刀刃数 的大致参考标准如表2所示。 Feed per Tooth is an important element for efficient machining which should be determined by parameters such as tool diameter, type, work material, cutting machine, rigidity of tool holder, machining configuration, accuracy and cutting depth. Table 2 is a guideline of Feed per tooth for short flute end mills. 表1 切削速度 Table 1. Cutting speed 表2 每刃进给量 Table 2. Feed per tooth 加工材料 Work material 切削速度 [m/min] Cutting speed (m/min) 钨钢铣刀 Solid carbide tool 涂层钨钢铣刀 Coated carbide tool 碳素钢(S50C等) Carbon steels 30~60 60~150 合金钢(SCM, SKD等) Alloy steels 30~40 60~100 调质钢(NAK, HPM等) Prehardened steels 30~40 60~100 不锈钢(SUS304等) Stainless steels 20~30 40~80 高硬度钢 (SKD61,STAVAX等45~60HRC) Hardened steels - 20~100 外径 [mm] Dia. (mm) 每刃进给量 [mm/tooth] Feed per tooth(mm/tooth) 2刃 2-flutes 4刃 4-flutes 1 0.001~0.005 6 0.02~0.04 0.01~0.03 10 0.04~0.08 0.03~0.06 20 0.08~0.12 0.06~0.1 ※短刃造型铣刀以外的铣刀,因刃长、颈长不同,每刃进给量必须设为表2数据的80%以下。 ※Note: Feed per tooth for standard flute size end mills should be adjusted to 80% or less from table 2. 参考上述的切削速度和每刃进给量,考虑切削相关的所有因素加工形状、精度、使用机床、刀柄刚性 等,来决定主轴转速和进给速度。 Referring above parameters of Cutting speed and Feed per tooth, both Spindle speed and Feed are calculated considering all other related factors as well. 技术资料 Technical Guidance 技术资料 Technical Guidance 切削速度 vc(m/min) Cutting speed = 1,000 主轴转速 n (min ) Spindle speed = vc÷π÷D×1,000 进给速度 vf (mm/min) Feed n×fz×Z(刃数) 每刃进给量 fz (mm/tooth) Feed per tooth = vf n × Z(刃数) -1 = π(圆周率3.14)×D(外径 mm)×n(主轴转速 min ) -1 切屑排出量 Metal removal rate = ap × ae × vf 1,000 理论表面粗糙度 ※平坦部 Theoretical surface finish ※Plane = ae² × 1,000 ÷ 8R ap : 轴向切深量 (mm) Axial depth of cut ae : 径向切深量 (mm) Radial depth of cut vf : 进给速度 (mm/min) Feed Q(cm³/min) h(μm) ae : 径向切深量 (mm) Radial depth of cut R : 球头半径 (mm) Ball radius 使用机床的主轴不满足切削参数表的转速时… 利用下述的计算式以相同的比率降低主轴转速和进给速度后使用。 When maximum speed of the machine spindle less than value of recommended milling conditions, adjust conditions by calculation as follows. 使用MSE430 φ1加工S50C工件时 Machining S50C with MSE430 φ1 切削参数参考表的参数 Recommended milling condition 主轴转速 n : 20,700 min-1 Spindle speed n 进给速度 vf : 330 mm/min Feed vf 所用机床主轴转速最高为 12,000min 时-1 In case Maximum Spindle Speed of the machine is 12,000min-1... (割合) ( ) 330 ×0.483 = 159 mm/min 10,000 ( )÷20,700 ( )=0.483 例 Example 主轴转速 n : 10,000 min-1 Spindle speed n 进给速度 Feed vf vf : 159 mm/min ■ 切削速度、主轴转速、进给速度的计算方法 Calculation for Cutting Speed, Spindle Speed and Feed
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