南航機(jī)械原理縫紉機(jī)課程設(shè)計(jì)

1、目錄1 設(shè)計(jì)題目22 原始數(shù)據(jù)33 齒輪設(shè)計(jì)44 桿件長度的計(jì)算65 主要計(jì)算結(jié)果76 用解析法對(duì)滑塊進(jìn)行B 運(yùn)動(dòng)分析97 用圖解法對(duì)兩個(gè)極限位置和一個(gè)一般位置進(jìn)行運(yùn)動(dòng)分析128 E 點(diǎn)的運(yùn)動(dòng)軌跡179 MATLAB程序代碼1910B 點(diǎn)的位移、速度、加速度數(shù)據(jù)2011E 點(diǎn)的坐標(biāo)數(shù)據(jù)2112參考書目22設(shè)計(jì)題目縫紉機(jī)導(dǎo)線及緊線機(jī)構(gòu)設(shè)計(jì)及其運(yùn)動(dòng)分析結(jié)構(gòu)示意圖 : 該機(jī)構(gòu)由 O1 軸上齒輪驅(qū)動(dòng)齒輪2， O2 軸上還固接有曲柄 O 2 A和 O 2C ，曲柄滑塊機(jī)構(gòu)O 2AB 的滑塊為縫紉針桿，曲柄搖桿機(jī)構(gòu)O2 O3DC 的連桿上點(diǎn) E 為緊線頭，針桿與緊線頭協(xié)調(diào)動(dòng)作，完成縫紉和緊線過程。原始數(shù)據(jù)

2、方案號(hào)一齒輪轉(zhuǎn)數(shù)n1rpm200齒輪轉(zhuǎn)數(shù)n2rpm230模數(shù)mmm中 心 距O1O 2mm距離Lmm針桿沖程Hmm桿長O2O3mm桿長O3Dmm角度1deg2deg3degdegdeg桿長DE/DC1.2554403634294212014410801.30.3齒輪設(shè)計(jì)由傳動(dòng)比公式知可取 z146 ， z1 40 。1，標(biāo)準(zhǔn)中心距2，齒輪嚙合時(shí)的壓力角由d cosd cos得arccosd cosarccos73.75cos20ood5420.71653，分度圓直徑4，基圓直徑5，變位系數(shù)由inv2( x1x2 ) taninvz1z2即inv 20.7165 o2( x1x2 ) tan 2

3、0oinv 20o4640得x1 x2 0.20108取x1 0.05108, x2 0.156，中心距變動(dòng)系數(shù)7，齒高變動(dòng)系數(shù)8，齒輪機(jī)構(gòu)的傳動(dòng)類型正傳動(dòng)9，齒頂高10，齒根高11，齒頂圓直徑12，齒根圓直徑13，齒頂圓壓力角14，分度圓上的齒厚15，齒頂厚經(jīng)檢驗(yàn)sa10.4 m0.41.250.5 mm16，重合度1(tan a1tan )1ooa z1z2 (tan a2 tan )46 (tan26.0167 tan20.7165)22oo1.683540 (tan27.2967 tan20.7165)經(jīng)檢驗(yàn)a(1.1 1.2)桿件長度計(jì)算由針桿沖程 H 可得由lO2 A0.3得l A

4、B設(shè) D 的兩個(gè)極限位置為D1 , D2所以，在D1O3 D2 中由余弦定理得所以，有以上兩方程得lDE由于1.3lCD所以l DE1.345.8389159.59058 mm主要計(jì)算結(jié)果計(jì)算項(xiàng)目結(jié)果6 用解析法對(duì)滑塊進(jìn)行B運(yùn)動(dòng)分析所以lO2 Acosl ABcos0由以上兩式可得對(duì)應(yīng)的位移曲線如下對(duì)上式求導(dǎo)得對(duì)應(yīng)的速度曲線如下再對(duì)上式求導(dǎo)得aB225.4cos 2 (1 0.09cos2)0.1215sin 2 218 & sin&1 (0.3cos) 2 320.1215sin 2 2 對(duì)應(yīng)10442.03827sin5.4cos 2(10.09cos2)580.113241 (0.3co

5、s) 2 32的加速度曲線圖如下用圖解法對(duì)兩個(gè)極限位置和一個(gè)一般位置對(duì)應(yīng)的速度加速度計(jì)算，并將結(jié)果與解析法的結(jié)果比較1 極限點(diǎn)一：90o1.1 速度分析速度比例尺：v100(mms) cm大?。?O2 AO2 A?方向：BAO2 ABA由圖可得（圖見坐標(biāo)紙）1.2 加速度分析(mm2 )加速度比例尺：a2000scm大?。海?2lO2 A？AB 2l AB方向：B AAO2BAB A由圖可得（圖見坐標(biāo)紙）aaa20003.67200 mm2方向水平向右Bs由解析法得到的結(jié)果如下aB7309.4285 mm s2方向水平向右2 極限點(diǎn)二：270o2.1速度分析(mm)速度比例尺：v100scm大

6、?。海縊2 AO2 A？方向：B AO2 ABA由圖可得（圖見坐標(biāo)紙）2.2加速度分析加速度比例尺：大?。海?000(mms2 ) cm&2lO2 A？AB 2 lAB方向：BAAO2BABA由圖可得（圖見坐標(biāo)紙）aBab 2000 6.8 13600 mm2方向水平向左s由解析法得到的結(jié)果如下a13574.64975mm 2方向水平向左Bs3 一般位置24o3.1 速度分析速度比例尺：v100(mms) cm大小：？&lO2 A？方向：B O2O2 AAB由圖可得（圖見坐標(biāo)紙）3.2 加速度分析(mm)加速度比例尺：a1000s2cm大?。?2lO2AAB 2l AB？方向B O2A O2B

7、 AAB由圖可得（圖見坐標(biāo)紙）aBab10006.356350 mm2方向水平向右s由解析法得到的結(jié)果如下aB6382.97554 mm 2方向水平向右s8， E 點(diǎn)的運(yùn)動(dòng)軌跡O3 點(diǎn)坐標(biāo)為點(diǎn)坐標(biāo)三角形 O2O3 D 中，由余弦定理可得由正弦定理有所以由余弦定理得所以所以所以并且54o ， l O2O334mm ， l O3D29mm ， lO2C12.18580mm ，l CD45.83891mm ， l DE59.59058 mm ，聯(lián)立以上各方程可以畫出E 點(diǎn)軌跡如下9， MATLAB程序代碼位移曲線x=0:0.0001:2*pi;y1=18*sin(x);y2=60*sqrt(1-0.

8、09*(cos(x).2);y=y1-y2;plot(x,y);速度曲線a=0:1:360 x=a*pi./180;y1=18*cos(x);y2=2.7*sin(2*x);y3=sqrt(1-0.09*(cos(x).2);y=(y1-y2./y3)*24.08554plot(x,y);加速度曲線a=0:0.0001:360;x=a.*pi./180;y1=18.*sin(x);y5=(1-0.09*(cos(x).2).1.5;y=(0-y1-(y2.*y3-y4)./y5).*24.085542;plot(x,y);點(diǎn)的運(yùn)動(dòng)軌跡曲線a=10.*pi./180:0.0001:80.*pi.

9、/180;b=54.*pi./180;o3x=-34.*cos(b);o3y=34.*sin(b);dx=o3x+29.*cos(a);dy=o3y+29.*sin(a);r1=asin(34.*sin(a+b)./o2d);r2=acos(o2d).2+45.83891.2-12.18580.2)./(2.*(o2d).*45.83891);plot(ex,ey);B 點(diǎn)的位移、速度、加速度數(shù)據(jù)角度（ ）位移（ mm)速度（ mm/s)加速度（ *10000mm/s2)0-57.2364433.5397-0.32845-55.3960419.5697-0.356210-54.1960403.

10、6721-0.488515-54.2640382.6548-0.532620-51.4101363.8259-0.604025-4902235334.6655-0.645230-48.9396317.1352-0.678435-47.8654285.2145-0.693240-46.8239266.3064-0.719745-45.9654235.3256-0.723550-45.0851213.4059-0.737255-44.2852183.2654-0.738660-43.7327159.8069-0.740465-43.1235135.2356-0.739670-42.7689106.

11、2564-0.737075-42.532686.2354-0.736880-42.192053.0112-0.732785-42.086525.1254-0.731590-42.00000-0.730995-42.0980-25.1256-0.7315100-42.1920-53.0112-0.7327105-42.4562-86.2354-0.7331110-42.7689-106.2564-0.7370115-42.7523-135.2356-0.7395120-43.7327-159.8069-0.7404125-44.0567-183.2654-0.7386130-45.0851-21

12、3.4059-0.7372135-45.1254-235.3256-0.7245140-46.8239-266.3064-0.7197145-47.3265-285.2145-0.6923150-48.9396-317.1352-0.6784155-49.2464-334.6655-0.6523160-51.4101-363.8259-0.6040165-52.1656-382.6548-0.5324170-54.1960-403.6721-0.4885175-56.2354-419.5697-0.4256180-57.2364-433.5397-0.3284185-59.0123-445.3

13、566-0.2456190-60.4473-450.2344-0.1259195-61.2395-450.56840.0025200-63.7229-450.96220.1103205-64.2354-443.25460.2354210-66.9396-433.77760.3658215-68.2546-413.65920.4562220-69.9643-397.91500.6227225-71.2356-375.36540.7562230-72.6627-343.94200.8626235-73.5656-300.24680.9654240-74.9096-273.73281.0682245

14、-75.2114-293.26541.1235250-76.5978-190.30221.2254255-77.0123-100.26651.2986260-77.6451-97.55551.3239265-77.9654-46.55661.3452270-78.000001.3575275-77.965446.55661.3698280-77.645197.55551.3239285-77.0123100.26651.3211290-76.5978190.30221.2254295-75.2114293.26541.1235300-74.9096273.73281.0682305-73.56

15、56300.24680.9654310-72.6627343.94200.8626315-71.2356375.36540.7562320-69.9643397.91500.6227325-68.2546413.64920.5241330-66.9396433.77760.3658335-64.2354443.25960.2415340-63.7229450.96220.1103345-61.2395450.56840.0025350-60.4473450.2344-0.1259355-59.0123443.2546-0.2456360-57.2364433.5397-0.328412.E 點(diǎn)的坐標(biāo)數(shù)據(jù)（與對(duì)應(yīng)）a( ）Ex(mm)Ey(mm)1066.066148.21981561.077162.15532057.819668.97522554.820174.35533051.922178.90573549.061182.86784046.205986.36194543.3433