數(shù)控車(chē)床主傳動(dòng)設(shè)計(jì)(編輯修改稿)
2025-07-27 01:24 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 性要求。.78s???v2~(6) 帶輪中心距 的確定：0a ???????即： 75353? 初取 02a?(7) 帶基準(zhǔn)長(zhǎng)度 的確定：dL????2101024d Da???= ????2315025014m?? ?????? ??? ?? 由手冊(cè)選取 08dL?(8) 確定實(shí)際軸間距 的確定：a，??3150=82.?V 2a()/4mLLD????（ ） /4 )./4????（ ）52.?安裝時(shí)的最小軸間距： ???????張緊或補(bǔ)償伸長(zhǎng)的最大軸間距： ax.. ??(9) 小帶輪包角： 211 ?????????????所以小帶輪包角合適。(10) 求帶根數(shù)查手冊(cè)得 ， ， ，?=?=.46wPKV??????0 1323..46..cLz? ?????根取 根4?(11) 求張緊力 ：?????????? 23..??? ?(12) 軸上載荷： 10 N???? 齒輪的設(shè)計(jì)與校核 各個(gè)傳動(dòng)軸所傳遞動(dòng)力計(jì)算電動(dòng)機(jī)輸出功率 = =11kw，額定轉(zhuǎn)速 =1500r/min，0Pd0n輸出轉(zhuǎn)矩 =9550 =T0/7mN?軸 I = =11 = 為帶傳動(dòng)效率10??0? = = =711r/minn1i5/ =9550 =1T??軸 II = = =， 分別為軸承、21?2?1?2齒輪傳動(dòng)效率。 高速 = =711 =535 r/min2n1i? =9550 =9550 =T?? 低速 = =711 =283 r/min2?12ni? =9550 =9550 =T??2?.?軸 III = = =， 分別為、軸 III 上3P2?3 23?軸承、齒輪傳動(dòng)效率 高速 = =535 =599 r/min3n2?1i? =9550 =9550 =?低速 = =283 =90 r/min3?2??i =9550 =9550 =3T??3nP?? 齒輪副( )的設(shè)計(jì)與校核 2870齒輪材料為 20Cr，滲碳淬火，低溫回火，小齒輪硬度 60HRC，大齒輪硬度56HRC。1. 齒面接觸疲勞強(qiáng)度計(jì)算1）.初步計(jì)算轉(zhuǎn)矩 =9550 =9550 =2T??2Pn?? 齒寬系數(shù) 查手冊(cè) =?接觸疲勞強(qiáng)度極限 查手冊(cè) =1250MPa, =1200MPa,lim1H?lim2H初步計(jì)算許用接觸應(yīng)力 = =1125 MPa, ??li= =1080MPa2Hlim2值 查表 =85dAdA初步計(jì)算小齒輪直徑 ≥ = 1d321[]dHTu?????.??≥，取 =80mm1初步齒寬 b= = 80，取 b=40mmd2).校核計(jì)算圓周速度 v v= =????精度等級(jí) 查手冊(cè)選 7 級(jí)齒數(shù) Z 和模數(shù) m =28，m= =，取 m=3 , = =84mm1Z9321dmz =70， =70 3=210mm，b= = 84=42mm22d?d1??使用系數(shù) 查手冊(cè)得 =動(dòng)載系數(shù) 查手冊(cè)得 =齒間載荷分配系數(shù) = =8147NH?2t1dTF??3480 = =194N/mm100N/mmtAb7. 查表得 = HK? = ==[.83()]cosz?????1[.832()]70?? =????齒向載荷分配系數(shù) 查表得 =?HK?載荷系數(shù) K K= = =??彈性系數(shù) 查表得 =節(jié)點(diǎn)區(qū)域系數(shù) 由圖得 =接觸最小安全系數(shù) 由表得 = 總工作時(shí)間 =10 300 8 =4800hhtht? 應(yīng)力循環(huán)次數(shù) = =60 1 711 4800=??810=27/.0i?接觸壽命系數(shù) 由圖 =， =許用接觸應(yīng)力 = = =1131MPa??H???1HlimS?? = =驗(yàn)算 = H?EZ?21(u+)bdKT?= ?(.51+)?= ??1H?3).齒輪傳動(dòng)主要尺寸 中心距 a = =147mm2)m(za???3(8+70)齒寬 b 大齒輪 ,小齒輪24b152bm?2. 齒根彎曲疲勞強(qiáng)度驗(yàn)算齒形系數(shù) ??應(yīng)力修正系數(shù) 由圖得 S .重合度系數(shù) =+ =+ =??07?齒間載荷分配系數(shù) 由表查得 =?FK齒向載荷分配系數(shù) b/h=42/ ( 3)= 由圖知 =??FK?載荷系數(shù) K K= = =???彎曲疲勞極限 由圖查得 =620MPa,minF?min1?=620 MPa,i2F彎曲最小安全系數(shù) 由表得 =應(yīng)力循環(huán)次數(shù) = =60 1 711 4800= LN1L60ht???810=27/?彎曲壽命系數(shù) 查彎曲壽命系數(shù)圖 =， =尺寸系數(shù) 査尺寸系數(shù)圖 = x x許用彎曲應(yīng)力 =??F??????=??2F???驗(yàn)算 = 121aSKTbd?? .???=265MPa??1F? 221aSFFY.57460aMP???2F????? 齒輪副( )設(shè)計(jì)與校核 2476齒輪材料為 20Cr，滲碳淬火，低溫回火，小齒輪硬度 60HRC，大齒輪硬度56HRC。1. 齒面接觸疲勞強(qiáng)度計(jì)算1）.初步計(jì)算 轉(zhuǎn)矩 =9550 =9550 = .3T??3nP?? 齒寬系數(shù) 由表 =?接觸疲勞強(qiáng)度極限 =1600MPa, =1600MPa,lim1H?lim2H初步計(jì)算許用接觸疲勞強(qiáng)度極限 = =1440 MPa, ??1li1?= =1440 MPa2Hlim2 值 查表 =85dA dA初步計(jì)算小齒輪直徑 ≥ = 1d321[]dHTuA????????≥，取 =96mm11初步齒寬 b= = 96，取 b=48mmd2).校核計(jì)算圓周速度 v v= =????精度等級(jí)
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