台灣鈷領產品型錄
16 74° 6 9 ° 55° 143° 92° GTC milling strategies Ratio of flute width to tool diameter with trochoidal milling Flute width 1.7 – 2.0 x D • cut in C arc • a e max. 0.10 x D (theor. 37º) • increase of angles of engagement by up to 50% Flute width 2.1 – 3.0 x D • cut in C arc • a e max. 0.15 x D (theor. 46°) • increase of angles of engagement by up to 50% Flute width from 3.1 x D • cut in D arc • a e max. 0,20 x D (theor. 53°) • increase of angles of engagement by up to 40% Angle of engagement with 90º corner radii Tool radius = Corner radius • very unfavourable for tool dynamics • change of stress direction • abrupt increase in tool stress Example: Increase of engag. angle from 53º to 143º (270º) Measures: v c and f z must be heavily reduced Tool radius < Corner radius • machine can interpolate the path • no “impact” on tool • lower increase of tool stress Example: Increase of engag. angle from 53º to 92º (174º) Measures: a e must be reduced f z must be heavily reduced in radius a e 0.20 x D a e 0.20 x D Influence on process through tool engagement 刀具切削與工件的 "接觸嚙合角度" 對加工過程的影響 刀具半徑=工件圓弧半徑 非常不利的刀具動態路徑 刀具的受力改變 刀具受力突然增加 機器可以插補路徑 C形圓弧切削 切寬 ae 最多 0.10D (理論上嚙合 37° ) 切寬 ae 最多 0.15D (理論上嚙合 46° ) 切削嚙合角度增加最多至 50 %。( 37°x 1.5=55.5° ) 切削嚙合角度增加最多至 50 %。( 46°x 1.5=69° ) C 形圓弧切削 切寬 ae 最多 0.20 D (理論上嚙合 53° ) 切削嚙合角度增加最多至 40° 。( 53°x 1.4=74.2° ) C 形圓弧切削 對刀具無“影響” 降低刀具受力 接觸嚙合角度由 53° 增加至 92° 改善措施: 切寬 ae 必須減少 fz 每刃進給於圓角加工時必須大幅降低 90° 內凹圓形繞銑嚙合角度變化 刀具半徑 < 工件圓弧半徑 擺線銑削時槽寬與刀具直徑之比 槽寬 3.1 x D 接觸嚙合角度由 53° 增加至 143° 接觸嚙合角度由 53° 增加至 92° 改善措施:必須大幅降低 vc 和 fz 改善措施:於圓角加工時必須大幅降低 fz 接觸嚙合角度由 37° 增加至 55° 接觸嚙合角度由 46° 增加至 69° 接觸嚙合角度由 53° 增加至 74° 接觸嚙合角度由 53° 增加至 143° 改善措施:必須大幅降低 vc 和 fz 槽寬 1.7~2.0 x D 槽寬 2.1~3.0 x D
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