[????] ???? ????

1. ?? ???? M48? ??? ????. ??, Ħ²Á‚S”µ ¦Ì=0.1? ??.
M 48? ?? P=0.5mm ???? d2=44.752
??? tan¦Á=p/¦Ð*d2
=5/¦Ð*44.752=0.0355
¦Á=tan-10.0355=2.03o
?????? ¦Ì¡®=¦Ì/cos(¦Â/2)
=0.1/cos30=0.115
¦Ñ=tan-10.115=6.59o
??? ?? ¦Ç=tan¦Á/tan(¦Á+¦Ñ)
=tan20.03'/tan(2.03+6.59)
=0.233=23.3 %

2. ???? ???? 3/4-10UNC? ???? ??? ???? ???. ??, ÝSºÉÖØ 2ton, ???? ¦Ì=0.15? ??.
???? ???? 3/4-10UNC? ???? d=19.05
??? d1=16.200, ??p=2.5400,??? 2ton
?? ??? r=????? 1/2
?, d2=17.399, r=d2/2=8.6995=8.7
tan¦Á=p/¦Ð*d2
=2.54/(2¦Ð*8.6995)=0.0464
¦Á=2.660
¦Ì=0.15,¡¡¦Ñ=8.810???
¦Ì¡®=¦Ì/cos(¦Â/2)=0.15/cos(30)=0.1732¡¡¡¡
¦Ñ=tan-1 0.155= 9.80
???? T=Q*r*tan(¦Á+¦Â)??
T=2000*(17.399/2)*tan(2.66+9.8)=3844Kg-mm

3. ?? ???(screw jack)? ??°ô? ?? 1¡°? 1? 4½Ç????. ? ÓÐЧ??? 60mm, ???? Ħ²Á‚S”µ ¦Ì=0.15, ??? ÓÐЧ???? 25mm??, ??? ? ½ÓÓ|²¿?? Ħ²Á‚S”µ? 0.05??. ? ??? 2ton? ?? ??? ??? ??? ?? 20Kg?? ?? ??? ??? ??? ????? ? ?? ?? ЧÂÊ? ?????
P=T/L, T=T1+T2, r=d2/2
T1=Q*r*tan(¦Á+¦Ñ)
=Q*30*((P+¦Ì¦Ðd2)/((¦Ì*d2)-(¦Ð*P))
=2000*30*((25.4+(0.15**60)/((*60)-(0.15*25.4)