机械加工时间定额（下）

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">2、刨削、插削

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">所用符号

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">t_j——机动时间(min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">L——切刀或工作台行程长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1——被加工工件长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1₁——切入长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1₂——切出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1₃——附加长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1₄——行程开始超出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">1₅——行程结束时超出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">B——刨或插工件宽度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">h——被加工槽的深度或台阶高度(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">U——机床平均切削速度(m/min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">f——每双行程进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">i——走刀次数

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">n——每分钟双行程次数

normal style="MARGIN: 0cm 0cm 0pt 29.9pt; TEXT-INDENT: 30pt; LINE-HEIGHT: 30pt">n=(1000×V_C)/L×(1+K)

normal style="MARGIN: 0cm 0cm 0pt 29.9pt; TEXT-INDENT: 30pt; LINE-HEIGHT: 30pt">注：龙门刨：K=0.4-0.75

normal style="MARGIN: 0cm 0cm 0pt 29.9pt; TEXT-INDENT: 30pt; LINE-HEIGHT: 30pt">插床：K=0.65-0.93

normal style="MARGIN: 0cm 0cm 0pt 29.9pt; TEXT-INDENT: 30pt; LINE-HEIGHT: 30pt">牛头刨：K=0.7-0.9

normal style="MARGIN: 0cm 0cm 0pt 29.9pt; TEXT-INDENT: 30pt; LINE-HEIGHT: 30pt">单件生产时上面各机床K=1

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt">①插或刨平面

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt">t_j=(B+1₂+1₃)×i/(f×n)=2×(B×1₁+1₂+1₃)×i/(f×U_m×1000)  (min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt">②刨或插槽

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt">t_j=(h+1)×i/(f×n)=(h+1)×i×L/(f×U_m×1000)  (min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt">注：龙门刨：1₄+1₅=350mm

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">    牛头刨：1₄+1₅=60mm  (各取平均值)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">⑨刨、插台阶

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">t_j=(B+3)×i/(f×n)  (横向走刀刨或插)  (min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt">t_j=(h+1)×i/(f×n)  (垂直走刀刨或纵向走刀插)  (min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 30pt"> 

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">3、钻削或铰削

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">所用符号

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">t_j——机动时间  (min)    1——加工长度  (mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">1₁——切入长度   (mm)    1₁——切出长度  (mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">f——每转进给量 (mm/r)   n——刀具或工件每分钟转数  (r/min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">Φ——顶角      (度)     D——刀具直径   (mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">L——刀具总行程=1+1₁+1₂(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">钻削时：1₁=1+D/[2×tg(Φ/2)]或1₁≈0.3P(mm)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">①一般情况

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">t_j=L/f×n(min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">②钻盲孔、铰盲孔

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">t_j=(1+1₁)/(f×n)(min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">③钻通孔、铰通孔

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">t_j=(1+1₁+1₂)/(f×n)(min)

normal style="MARGIN: 0cm 0cm 0pt 29.95pt; TEXT-INDENT: -6pt; LINE-HEIGHT: 28pt">4、齿轮加工

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">所用符号

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j——机动时间(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">B——齿轮宽度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">m——齿轮模数(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">Z——齿轮齿数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">B——螺旋角(度)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">h——全齿高(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f——每转进给量(mm/r)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">v_f——进给速度(mm/r)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">g——铣刀线数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n——铣刀每分钟转数(r/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">i——走刀次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1₁——切入长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1₂——切出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">D₀——铣刀直径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">d——工件节圆直径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f₁——工件每转径向进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f₂——每双行程圆周进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t——每齿加工时间(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n_z——加工每齿双行程次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n_分——每分钟双行程次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">①用齿轮铣刀铣削圆柱齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1)铣直齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B+1₁+1₂)×Z×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：(1₁+1₂)=d₀/(3～4)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2)铣螺旋齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B/cosβ+1₁+1₂)×Z×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注:(1₁+1₂)=d₀/(3～4)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">②用齿轮滚刀滚削圆柱齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">(1)滚切直齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B+1₁+1₂)×Z/(g×f×n)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：(1₁+1₂)=d₀/(3～4)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">(2)滚切螺旋齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B/cosβ+1₁+1₂)×Z/(g×f×n)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：(1₁+1₂)= d₀/(3～4)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">③用模数铣刀铣蜗轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(h+1₁)×Z/f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">④用蜗轮滚刀径向滚切蜗轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=3×m×Z/(g×n×f)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑤用指状铣刀成形铣齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B+0.5d₀+1₂)/(f×n)=(B+0.5d₀+1₂)/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：1₂=2—5(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑥插圆柱齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=h/(f₁×n)+π×d×i/(f₂×n)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑦刨齿机刨圆锥齿轮

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=t×Z×i

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：式中，t=n_Z/n_分(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 84pt; LINE-HEIGHT: 28pt">n_分=1000×V_c/2×L

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">          L——刀具行程长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑧磨齿

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=Z[L/n₀(i/f₁+21₂/f₂+21₃/f)+iτ₁+2i₂τ₂+2i₃τ₃]

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">将上式查表简化并取平均值为下式

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=Z[L/n₀×3.18+0.33](min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">式中，L=1+2[h(D-h)+10]^1/2——砂轮行程长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n₀——每分钟范成次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">D——砂轮直径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">h——全齿高

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">i₁、i₂、i₃——粗、半精、精行程次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f₁、f₂、f₃——粗、半精、精每次范成纵向进给量

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> 

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; LINE-HEIGHT: 28pt">5、铣削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">所用符号

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j——机动时间(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">L=1+1₁+1₂工作台行程长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1——加工长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1₁——切入长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1₂——切出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">V_f——工作台每分钟进给量(mm/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n——铣刀每分钟转数(r/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">B——铣削宽度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">i——走刀次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">d₀——铣刀直径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">D——铣削圆周表面直径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">α_p——切削深度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">β——螺旋角或斜角(度)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">①圆柱铣刀、圆盘铣刀铣平面、面铣刀铣平面

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1+1₁+1₂)×i/V_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：(1₁+1₂)=d₀/(3～4)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">②铣圆周表面

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=D×π×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">③铣两端为闭口的键槽

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1-d₀)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">④铣一端为闭口键槽

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1+1₁)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑤铣两端为开口的槽

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1+1₁+1₂)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：1₁=d₀/2+(0.5-1)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">    1₂=1-2(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑥铣半圆键槽

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1+1₁)/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：1=h——键槽深度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">    1₁=0.5-1(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑦按轮廓铣

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(1+1₁+1₂)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：1——铣削轮廓长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 48pt; LINE-HEIGHT: 28pt">1₁=α_p +(0.5-2)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 48pt; LINE-HEIGHT: 28pt">1₂=0-3(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑧铣齿条

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1)铣直齿条

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B+1₁+1₂)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2)铣斜齿条

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=(B/cosβ+1₁+1₂)×i/v_f(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：以上两式中1₁+1₂=d₀/(3～4)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">⑨铣螺纹

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1)铣短螺纹

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=L/V_周(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：式中，L=7πd/6(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">V_周——圆周进给速度(mm/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">d——螺纹外径(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2)铣长螺纹

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=d×π×L×g×i/(V_周×P)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：式中，L——螺纹长度(mm)    g——螺纹头数(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">          p——螺纹升程(度)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">3)外螺纹旋风铣削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=L×i/(n_W×p)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">4)内螺纹旋风铣削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=L×i/(n_W×p)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：上两式式中

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">L——被加工螺纹长度(mm)        i——走刀次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n_W=f_Z×n/(d×π)——工件转数    P——螺纹升程(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f_Z——每齿(刀头)的圆周进给量(mm/z)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n——铣刀转数(r/min)           d——螺纹外(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> 

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; LINE-HEIGHT: 28pt">6、用板牙或丝锥加工螺纹

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=[(1+1₁+1₂)/p×n+(1+1₁+1₂)／p×n₁]×i

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 35.75pt; LINE-HEIGHT: 28pt">=2×(1+2p)×i/(p×n)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">式中，t_j——机动时间(mm)    1——加工长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">      1₁——切入长度(mm)    1₂——切出长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">p——螺距(mm)         n——刀具或工件转数(r/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">n₁——刀具或工件返回转数 (r/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 23.6pt; LINE-HEIGHT: 28pt">7、拉削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t₁——H/(1000×V_C)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">式中，H——机床调整的冲程长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24.1pt; LINE-HEIGHT: 28pt">8、磨削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">所用符号

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j——机动时间(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">h——每面加工余量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">B——磨轮宽度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f_纵——纵向进给量(mm/r)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f_t——磨削深度进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">n——工件每分钟转数(r/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">A——切入次数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">K——光整消除火花修正系数=1.3

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">τ——光整时间(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">L——工件磨削长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1₁——工件磨削表面长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">b——工件磨面宽度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">V_W——工作台往复速度(m/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">f_B——磨削宽度进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">Z——同时加工工件数

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">①外、内圆磨削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1)纵向进给磨削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=2×L×h×K/(n×f_纵×f_t)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2)切入法磨削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=[h×A/f_t+τ]×K=(0.25×A/0.005+0.15)×1.3(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">②平面磨削

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1)周磨

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=2×L×b×h×K/(1000×V_W×F_B×f_t×Z)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：L=1₁+20(mm)           f_B=平均15(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">    f_t=0.003-0.085(mm)    V_W=5-20(m/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2)端磨

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=h×i/(f_双×n_双)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">注：f_双——双行程轴向进给量(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">    n_双——每分钟双行程数(双程/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">3)无心磨

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t_j=L×i/(0.95×V_f)(min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">式中，V_f——轴向进给速度(mm/min)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">L=1+B(单件)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">L=n_工×1+B(多件连续进给)(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">1——工件长度(mm)

normal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 60pt; LINE-HEIGHT: 28pt">n_Z——连续磨削工件数