Machining standard time (below)

Normal >2, dig cuts, insert cut Normal > place uses symbolic Normal >tj -- motor-driven time (Min)normal >L -- cutting tool or workbench journey length (Mm)normal >1 -- by treatment workpiece length (Mm)normal >11 -- cut length (Mm)normal >12 -- cut a length (Mm)normal >13 -- add length (Mm)normal >14 -- the journey begins to exceed length (Mm)normal >15 -- length exceeds when the journey ends (Mm)normal >B -- dig or insert workpiece width (Mm)normal >h -- by the deepness of treatment chamfer or step height (Mm)normal >U -- the machine tool is average cutting speed (M/min)normal >f -- every double journey feed (Mm)normal >i -- Normal >n -- Normal >n=(1000 × VC)/L (1+K)normal > notes: Dragon door dig: K=0.

4-0.

75normal > slotting machine: K=0.

65-0.

93normal > ox head: K=0.

7-0.

9normal > is odd when production above K=1normal > ① inserts or plane side Normal >tj=(B+12+13) × I/(f (1000) (min)normal > ② dig or the Normal MARGIN of × of Um of × of L/(f of × of I of N)=(h+1) × of × of 30pt">tj=(h+1) × I/(f: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 30pt"> notes: Dragon door dig: 14+15=350mmnormal > ox head: 14+15=60mm (takes average each) Normal > ⑨ dig, insert step Normal >tj=(B+3) × I/(f is transverse take knife plane or insert) (Min)normal >tj=(h+1) × I/(f is perpendicular dig taking a knife or fore-and-aft walk along a knife to insert) (Min)normal >normal >3, auger cut or bore with a reamer cuts Normal > place uses symbolic Normal >tj -- motor-driven time (Min) 1 -- machine length (Mm)normal >11 -- cut length (Mm) 11 -- cut a length (Mm)normal >f -- every turn feed (Mm/r) N -- cutting tool or workpiece Rpm (R/min)normal > Φ -- vertex angle (degree) D -- cutting tool diameter (Mm)normal >L -- =1+11+12(mm)normal > gets when cutting: Φ of 11=1+D/[2 × Tg(/ 2)] or 11 ≈ 0.

3P(mm)normal MARGIN of 28pt"> ① general situation: 0cm 0cm 0pt 29.

95pt; TEXT-INDENT: - 6pt; LINE-HEIGHT: 28pt">tj=L/f × N(min)normal > ② gets Normal >tj=(1+11)/(f × N)(min)normal > ③ gets Normal >tj=(1+11+12)/(f × N)(min)normal MARGIN of 28pt">4, gear cutting: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> place uses symbolic Normal >tj -- motor-driven time (Min)normal >B -- gear width (Mm)normal >m -- gear modulus (Mm)normal >Z -- tine teeth of a cogwheel counts Normal >B -- helix angle (degree) Normal >h -- fully teeth height (Mm)normal >f -- every turn feed (Mm/r)normal >vf -- feed speed (Mm/r)normal >g -- milling cutter line counts Normal >n -- milling cutter Rpm (R/min)normal >i -- Normal >11 -- cut length (Mm)normal >12 -- cut a length (Mm)normal >D0 -- milling cutter diameter (Mm)normal >d -- diameter of workpiece pitch circle (Mm)normal >f1 -- workpiece every turn radial feed (Mm)normal >f2 -- every pairs of journeys are circumferential feed (Mm)normal >t -- every tine handling time (Min)normal >nz -- machine Normal >n divides -- Normal > ① uses Normal MARGIN of 28pt">1) mill straight gear: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: I/vf(min)normal >tj=(B+11+12) × Z: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: (11+12)=d0/(3 ～ 4)(mm)normal MARGIN of gear of 28pt">2) mill helix: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(B/cos β + I/vf(min)normal > is noted: (11+12)=d0/(3 ～ 4)(mm)normal > ② boils with gear hob cut columnar gear Normal MARGIN of straight gear of 28pt">(1) rolling cut: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: N)(min)normal >tj=(B+11+12) × Z/(g: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: (11+12)=d0/(3 ～ 4)normal MARGIN of gear of helix of 28pt">(2) rolling cut: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(B/cos β + N)(min)normal > notes: (4)normal > ③ uses Normal >tj=(h+11) × Z/f(min)normal > ④ uses Normal MARGIN of × of N of × of Z/(g of × of 28pt">tj=3 × M: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> ⑤ uses Normal >tj=(B+0.

5d0+12)/(f × N)=(B+0.

5d0+12)/vf(min)normal > notes: 12=2, 5(mm)normal > ⑥ inserts columnar gear Normal MARGIN of × of I/(f2 of × of D of × of π of 28pt">tj=h/(f1 × N)+ : 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Normal > ⑦ gear-shaping: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Inormal >tj=t × Z: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: In type, t=nZ/n divides (Min)normal >n divides Lnormal > L -- length of cutting tool journey (Mm)normal MARGIN of 28pt"> ⑧ roll flute: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 3]normal >tj=Z[L/n0(i/f1+212/f2+213/f)+i τ 1+2i2: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> will go up to type checks a watch to simplify and take average to be Normal >tj=Z[L/n0 × 3.

18+0.

33](min)normal > type, l=1+2[h(D-h)+10]1/2 -- length of emery wheel journey (Mm)normal >n0 -- Normal >D -- emery wheel diameter (Mm)normal >h -- Normal >i1, I2, I3 -- Normal >f1, F2, F3 -- thick, half essence, essence every time Fancheng is fore-and-aft feed Normal >normal MARGIN of 28pt">5, milling: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> place uses symbolic Normal >tj -- motor-driven time (Min)normal >L=1+11+12 workbench journey (Mm)normal >1 -- machine length (Mm)normal >11 -- cut length (Mm)normal >12 -- cut a length (Mm)normal >Vf -- workbench is minutely feed (Mm/min)normal >n -- milling cutter Rpm (R/min)normal >B -- milling width (Mm)normal >i -- Normal >d0 -- milling cutter diameter (Mm)normal >D -- milling is circumferential exterior diameter (Mm)normal > α P -- cutting deepness (Mm)normal > β -- helix angle or bevel (degree) Normal MARGIN of plane of mill of milling cutter of plane of mill of 28pt"> ① columnar milling cutter, disc milling cutter, face: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(1+11+12) × I/Vf(min)normal > notes: (11+12)=d0/(3 ～ 4)(mm)normal > ② mill is circumferential exterior Normal MARGIN of × of 28pt">tj=D × π : 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Two end are 28pt"> ③ mill the keyway Normal >tj=(1-d0) × I/vf(min)normal > ④ mill is Normal >tj=(1+11) × I/vf(min)normal > ⑤ mill ringent chamfer Normal >tj=(1+11+12) × I/vf(min)normal > notes: 11=d0/2+(0.

5-1)(mm)normal > 12=1-2(mm)normal MARGIN of keyway of semicircle of 28pt"> ⑥ mill: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(1+11)/vf(min)normal > notes: 1=h -- keyway deepness (Mm)normal > 11=0.

5-1(mm)normal > ⑦ presses outline mill Normal >tj=(1+11+12) × I/vf(min)normal > notes: 1 -- milling outline length (Mm)normal >11= α P +(0.

5-2)normal >12=0-3(mm)normal MARGIN of rack of 28pt"> ⑧ mill: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Normal >1) mill spur rack: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(B+11+12) × I/vf(min)normal MARGIN of 28pt">2) mill helical rack: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=(B/cos β + 11+12) × I/vf(min)normal > notes: Above 4)(mm)normal MARGIN of whorl of 28pt"> ⑨ mill: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Normal >1) mill short whorl: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">tj=L/V week (Min)normal > notes: In type, l=7 π D/6(mm)normal >V week -- circumferential feed speed (Mm/min)normal >d -- thread outside diameter (Mm)normal >2) mill grows whorl Normal MARGIN of × of week of I/(V of × of G of × of L of × of 28pt">tj=d × π : 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: In type, l -- whorl length (Mm) G -- whorl head counts (Mm)normal > P -- whorl rises Cheng (degree) Normal MARGIN of milling of tornado of the whorl outside 28pt">3) : 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: P)(min)normal >tj=L × I/(nW: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Normal >4) : 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: P)(min)normal >tj=L × I/(nW: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: The Normal >L -- by treatment whorl length (Mm) I -- Normal >nW=fZ × N/(d) -- workpiece revolution P -- whorl rises Cheng (Mm)normal >fZ -- every tine (knife head) circumferential feed (Mm/z)normal >n -- milling cutter revolution (R/min) D -- outside whorl (Mm)normal >normal >6, machine whorl Normal MARGIN of × of N1] of × of P of ／ of 28pt">tj=[(1+11+12)/p × N+(1+11+12) : 0cm 0cm 0pt; TEXT-INDENT: 35.

75pt; LINE-HEIGHT: 28pt">=2 × (N)(mm)normal > type, tj -- motor-driven time (Mm) 1 -- machine length (Mm)normal > 11 -- cut length (Mm) 12 -- cut a length (Mm)normal >p -- pitch (Mm) N -- cutting tool or workpiece revolution (R/min)normal >n1 -- cutting tool or workpiece return revolution (R/min)normal MARGIN of 28pt">7, broaching: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">t1 -- H/(1000 × VC)(min)normal > type, h -- the stroke length that the machine tool adjusts (Mm)normal MARGIN of 28pt">8, grinding: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> place uses symbolic Normal >tj -- motor-driven time (Min)normal >h -- every mental allowance (Mm)normal >B -- grind round of width (Mm)normal >f even if -- fore-and-aft feed (Mm/r)normal >ft -- grinding deepness feed (Mm)normal >n -- workpiece Rpm (R/min)normal >A -- cut frequency Normal >K -- light is whole eliminate scintilla to amend coefficient =1.

3normal > τ -- smooth full time (Min)normal >L -- workpiece grinding length (Mm)normal >11 -- length of workpiece grinding surface (Mm)normal >b -- workpiece grinds range breadth (Mm)normal >VW -- speed of workbench move back and forth (M/min)normal >fB -- polishing width feed (Mm)normal >Z -- at the same time treatment workpiece counts Normal > ① , inside round grinding Normal MARGIN of grinding of 28pt">1) fore-and-aft feed: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: Ft)(min)normal >tj=2 × L: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">2) cuts law grinding Normal >tj=[h × A/ft+ ] × K=(0.

25 × A/0.

005+0.

15) × 1.

3(min)normal MARGIN of 28pt"> ② planar grinding: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt">1) week grinds Normal MARGIN of × of Ft of × of FB of × of VW of × of K/(1000 of × of H of × of B of × of 28pt">tj=2 × L: 0cm 0cm 0pt; TEXT-INDENT: 24pt; LINE-HEIGHT: 28pt"> notes: L=11+20(mm) FB= average 15(mm)normal > Ft=0.

003-0.

085(mm) VW=5-20(m/min)normal >2) end grinds Normal >tj=h × I/(f double) (Min)normal > notes: F double -- feed of double journey axial (Mm)normal > N double -- minutely double journey counts (double Cheng / Min)normal >3) grinds Normal >tj=L × I/(0.

95 × Vf)(min)normal > type, vf -- axial feed speed (Mm/min)normal >L=1+B(is odd) Normal >L=n labour × many successive feed) (Mm)normal >1 -- workpiece length (Mm)normal >nZ -- number of successive grinding work CNC Milling