Chapter 8. : : Moment 8-1 8-1 helix: AB ( ABC )load( | ) : | load ( c ) : BACtcnc |d2d2: 8-2load (right handscrew) : (left handscrew) pitch: 1 1 | nj n : 8-3 8-1-2 1) : dd 2) : d1 3) : 4) :12(d -d1) d2 :/ (d -d1)2 8-2 : 3 , 4 , , , ... 8-2-13 (Triangular ScrewThread) : , , pipe ... (1) mm . =60 8-5 8-1 (KSB0201) 8-2 (KSB0204) 8-2-24 (squarethread) : , , , . 8-7 4 8-2-3 (Trapezoidal ScrewThread) 4 ( ) + = 8-2-6Ball Screw( ) =90% (Ball ) 8-11 8-3 8-3-1 Torque [1] 4 8-12=P =Q F( ) =0 Icoc -Qinc=j(Qcoc - Iinc): ( ) ( )I Q jcoc - inccoc -jinc Qj - tcnc1 -jtcnc: tcnc |d2I Q| -d2jd2-j|orI Qtcn(c-j) j : tcnc jTorque 1 Ir Qrtcn(c-j) Qr| -d2jd2-j|r : 1/2: I

: I

Qlcn (j -c)1

: Torque1

Qrlcn (j -c) I

0 . j c(j c) [2] 3 8-13 3= Qcoo= jQcoo jQj jcoo tcnjI Qlcn (c-j )1 Qrtcn(c-j ) j j (cos o 1 ) 3 washer 1 Qrtcn(c-j ) -rnjnrn :jn : washer 8-3-2 0 I0 Qtcnc Q(j,d2)j : jitc/ j Q ( )/P ( ) (1 )Qj2rId2I02(d2,2)II0,IQtcn cQtcn(c - j )lcn ctcn(c - j ) jj lcn ctcn(c - j )8-14nc j 0 : c 0 c 2-jjmcx: c 4-j2jmcx tcn2(4 -j2)(Self Locking) : c jj lcn clcn 2c12-12 tcn2c < 0. 50% . 8-1 M16Bolt Nut . 20cm, Force =10kgf, =0.1, Nut =0.2, 1.4 ,=?Sol M16 j 2:: =14.701mmlcn c 214.701 0.0488 c 229=60 j :lcn j 0.1cos80 0.11 j 0810 200 Q14.7012tcn(229 - 08 ) -1.4 14.70120.2 Q=619kgf 8-2 : 4 2j 2.4 d 49 d1 80.8 lever : 610mm 132NForce=? Collar : =100mm =50mm : =0.15 Collar =0.1Solj 12.7:: |d2 ( ) =49 - 80.82=42.65mmTorque1111 d22Q | - d2jd2 - j|42.02Q 12.7 - 0.142.042.0 - 0.112.78.97Q Collar Torque1212 Q0.1 ((100 - 0 ),2 )2 8.7QTorque1 11-12 (8.97 -8.7)Q 7.72Q1 010 (::) 182 (N) 7.72Q(N::)Q 10480N 10.48KN 8-4 8-4-1Bolt Nut 8-4-2Bolt (1) Bolt(2) TapBolt(3) StudBolt(4) Reamer Bolt 8-4-3 Bolt Nut 8-4-4(1) CapScrew(2) Set Screw(3) WoodScrew(4) TappingScrew 8-5 8-5-1Bolt [1]Q d21ot4d1 : [2] + Moment1 Qrtcn(c - j )t1(10 d81)=10Qrtcn(c-j )d81ot Q(4 d21)tmcx 12 _o2t - 4t2( tc :) [3] 8-25 BoltCase1:j 0 FBDQ Q0Case2:jFBDQI Q -I- Bolt ct Q0,//- Gasket cc Q0,/q- Gas j Bolt =c Gasket Bolt Gasket =cQI (ct- c )// :Q (cc - c )/q : Ic , QI Q0-c//Q Q0-c/q Q0-c// Q0-c/q-Ic I,(//-/q)// Q0,ct,/q Q0,ccc I(ctcc)Q0(ct-cc)- Q 0 : Gasket =0 Gasket Gasket Bolt Gas . : Q 0 : c ccI Q0(ct-cc)ct : Gasket QIIQI Q0-c// Q0-I(ctcc)Q0(ct-cc) Q0ctQI Q0-Iccct-cc 8-5-2Nut H nj n :j : pitchH : Nut : or 3 : 4 , : : [1] 8-31 Q/8Q 4 d21ot-M /8 Q 0.82IQ (/8 0.82I) -=0 I , =nd1 4Z 10(nd1)(0 I)22210 nd1I2-o/, , o/ MZ2.70Qnd1IQ o/ 0.09d1nIotH nI 0.09 oto/d1oto/(ot o/)H 0.09d1, d1 0.$dH 0.0d [3] I: Qn4(d2-d21)Q : , I: :I: Qnd2/d2 (d -d1),2 :/ (d -d1),2 : 8-12 Ic(/q),c:2) 300 100 400 130 150 500 Ic,Q4(d2-d21)/Icn 4Q(d2-d21)IcQd2/IcH nI 4QI(d2-d21)IcQId2/Ic8-8. 8-32 Braket d=22mm Bolt . 4ton Bolt? =? .Sol Bolt Moment IL 2F| Bolt F F IL2|4000 2002 20 1000/q) ot F4 d21100041$.72 .$4/q),::2 t 18F4 d41 4.$/q),::2 tmcx 12 _o2t - 4t2 .00/q),::2 tc||onc/|c 12 Sj 12(24 ) 12/q),::2 SF 12,.00 2.1 ( )8-10 400mm, 0.98MIc cylinder cover 12 Bolt . Bolt =47MIc , Bolt ?00 2I, cc,ct 2Sol Bolt PI jA,n 0.9$ (MIc)4 4002(::2),12 12810N,12 10202.NQI Q0-Iccct-cc, Q0 2I 210202. -10202.21 -24 d21ot4 d2147 100(N:2)(:108::)2 27807Nd1 _ 27807474 27.28::