机械5

箱体双面粗镗床总体设计及左主轴箱设计 摘要：为了提高加工效率和质量以及满足拖拉机变速箱体相应粗镗孔的尺寸精度及位置精度的要求，需要设计一台双面粗镗床。 因此我进行了箱体双面粗镗床总体设计及左主轴箱设计。在分析了工件特点的基础上，按组合机床的设计方法和步骤，进行了组合机床的总体设计。绘制了被加工零件的工序图、加工示意图、机床联系尺寸图和生产率计算卡。在此基础上，拟订了主轴箱的传动路线，应用最优化方法布置齿轮，确定传动参数。最后绘制了主轴箱装配图、箱体图、前盖及后盖的补充加工图，进行了轴、齿轮等零件的强度校核。该组合机床机较好地完成了设计要求，大大提高了工作效率。 关键词：双面粗镗；主轴箱；组合机床 The Overall Desig
n of Box Two-Side Rough Bori
ng machi
nes A
nd The Left Headstock Desig
n Abstract:. To improve the efficie
ncy of processi
ng, quality assura
nce of tractor tra
nsmissio
n gear a
nd cyli
nder block three rough surface correspo
ndi
ng Bori
ng. Therefore I overall desig
ned a two-sided rough bori
ng machi
ne a
nd left spi
ndle box desig
n.O
n the base of a
nalyzi
ng the characteristics of theworkpiece,as the methods a
nd procedures of the modular machi
ne tool desg
n, I overall desig
ned the two-sided rough bori
ng machi
ne. By the process of drawi
ng,the schematic diagram of machi
ni
ng,the relatio
nship of the machi
ne size a
nd the card of the productivitywere draw
n. The
n the primitive chart for the desig
n of the left-side spi
ndle boxwas give
n out. The tra
nsmissio
n routewas co
nfirmed a
nd the tra
nsmissio
n parameterwas made. The assembly diagram of the spi
ndle boxwas draw
n. After arra
ngi
ng the gears,we used the optimized desig
n. The suppleme
nt processi
ng diagram of the fro
nt side a
nd behi
nd side platewere also made. The i
nte
nsity of the axises a
nd gearswas checked. The machi
ne ca
n satisfy the requireme
nt of the desig
n a
nd the co
ntrolli
ng precisio
nwaswholly improved. Keywords： two-side Rough Bori
ng ; spi
ndle box; modular machi
ne tool. 目录 1绪论..............................................................1 2组合机床总体设计..................................................2 2.1被加工零件的特点................................................2 2.2工艺方案的确定.................................................2 2.3切削用量的确定..................................................3 2.4选择刀具结构....................................................6 3组合机床总体设计—三图一卡.......................................6 3.1被加工零件工序图................................................6 3.2加工示意图.....................................................8 3.3机床尺寸联系总图..............................................11 3.4机床生产率计算卡..............................................13 4左主轴箱设计....................................................15 4.1左主轴箱箱体零件的设计.........................................15 4.2确定传动轴的位置和齿轮齿数.....................................18 4.3坐标计算......................................................20 4.4主轴等有关零件的设计...........................................20 4.5主轴箱坐标计算、绘制坐标检查图.................................20 4.6齿轮的校核及参数的确定.........................................22 4.7箱体或前盖补充加工图...........................................24 5设计总结.........................................................26 参考文献...........................................................26 致谢...........................................................27