自动回转分度工作台毕业设?- 百度文库

[H]ýӴӦ dݿϵ ZEϵ ZHڵϵ Zšغ϶ϵ ȡСת T1?5N?m

غϵ غƽȣȡK?1.2 ݿϵ ??0.6 Ħϵ u?0.03 ýӴѹ [?H]??Hlim?ZnSHlim

ͼֵĽӴƣͼ?Hlim?300MPa

ӴǿȵСȫϵSH?1.6

ӴƣǿȼϵZN?1

lim[?H]??Hlim?ZnSHlim?300?1?187.5MPa 1.6ϵ ZE?189.8E/MPa ڵϵ ZHغ϶ϵ Z?ϲ빫ʽ

?2.5

?1.5

2?1.2?51.03189.8?2.5?1.52??()?21.4mm

0.60.03187.5d1?33.4.3 ȷֵҪҪߴ

ȡZ1?30Z2?i?Z1?90 ģ m?d1?23/30?0.78mmȡ׼ֵm?1mm Z1ľ ׼ľ a?Ҫߴ

11mZ1?Z2)??1?120?60mm 22ֶԲֱD1?mZ1?1?30?30mm D2?mZ2?1?90?90mm

ݶԲֱDa1?D1?2m?30?2?32mm

Da1?D1?2m?90?2?92mm

ݿȡݿϵ?d?0.6 b??dd1?0.6?30?18mm

3.4.4 У˳ݸƣǿ

ݸƣǿУ˹ʽʽ(3.4)ʾ

?F?2KT1bdYFaYSaY??[1m?F] ʽ Kغϵ

T1Сתأ

bֳݿ YFaϵ YsaӦϵ Y?5غ϶ϵ

ȡغϵ K?1.2 Сת T1?5N?m

ֳݿ b?18mm غ϶ϵY??1.5 ϵ YFa?2.3 Ӧϵ Ysa?2.6

?F?2?1.2?5?10324?30?1?2.3?2.65?1.5?152.375MPa

Ӧ㹫ʽʽ3.5ʾ

[?FlimF]??YNYXSFmin ʽ

Flimֵijݸƣͼޣ

SFminƣǿȵСȫޣ YNƣǿȼϵ YXߴϵ ȡֵijݸƣͼަ

Flim =400MPa

ƣǿȵСȫSFmin=1.4

ʽ(3.4) ʽ3.5

ƣǿȼϵYN=1 ߴϵYX=0.8

[?F]?ݼ㣬

F[F]

300?1?0.8?171.43MPa

1.4Գֳݸǿ㹻

3.5 ϸ˴

ϸ˴ڿռ佻䴫˶Ͷһִ߼ļнǿΪֵõΪ90㡣ϸ˴ڽ䴫˶Ͷϸ˴ϸ˺ɣһϸΪϸ˺һ֮ϸ˴ֱΪϸ˺ϸˡϸֻһߵijΪͷϸˣϸתһܣתһݣϸߣͳΪ˫ͷϸˣϸתһܣתݡϸ״IJͬɷ֣Բϸ˴ϸ˴׶ϸ˴

ϸ˴ص㣺ȴ󣬽ṹաϸͷZ1ʾһZ1=1~4ֳZ2ʾӴȹʽI=Z2/Z1ԿZ1=1ϸΪͷϸתZ2תֲתһתɵõܴ󴫶ȣһڶУȡI=10-80ڷֶȻУIɴ1000ĴóִҪȡ༶Уϸ˴ṹգСᡣ ƽȣΪϸ˳ϵݣֳʱϵģϸ˳ûн˳ϵḶ́˹ƽȣ𶯡Сϸ˴ԡϸ˵ǺСʱϸֲִֻܴܴϸתϸ˴ЧʵͣһΪϸ˴Чʱȳִ͡ǾԵϸ˴Ч0.5£һЧֻ0.70.9󣬳ĥ𣬳ɱߡ

3.5.1 ϸ˴

ǰѡ֪T=5N2mϸ˴趨Ϊi=120Чʦ=0.8հÿ300ռƣΪ10ꡣ

ݱδڻϵĹ̨崫Ҫ󴫶ȸߣϸ˲ýϸˣ崫ҪƱȽϴϸ˵ĴҲȽϴ󣬶ҹ̨ڹҪܣϸ˲õͷϸˣΪ˹̨ڹҪƽ빤ƽȣϸ˵

3.5.2 ϸ˵IJ

ǵϸ˴Чʲٶֻеȣϸ45Ÿ֣ΪﵽߵЧʺ͸õĥԣҪϸӲΪ45-55HRCͭZCuSn10Zn2졣Ϊ˽ԼصɫȦͭ죬оûHT100졣

3.5.3 Ӵƣǿ

ݱʽϸ˴׼ȰӴƣǿȽƣУ˳ݸƣǿȡľ๫ʽʽ3.6

a?3kT2(ʽ T2תأ k ʹϵ ZEϵ ZѡӴϵ [H]Ӧ ȷϵתT2

Z1=1ȡЧʦ=0.9

ZEZ?[?H])2 ʽ3.6

T2?T???i?5?0.9?360?1440N?m

ȷغϵk

غɽȶȡغɷֲϵK=13-2ʹϵKAѡȡKA=1.15תٲߣ󣬿ȡϵKV=1.2

K?KA?K??KV?1?1.15?1.11?1.265?1.27

3-2 ʹϵ KA ƽ ƽ ΢ еȳ س 1.00 1.10 1.25 1.50 ΢ 1.25 1.35 1.50 1.75 еȳ 1.50 1.60 1.75 2.0 س 1.75 1.85 2.0 2.25

ȷӰϵZE

ѡõֺͭϸ䣬3-3ɲZE=152

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