本文是有关推动架工艺步骤的说明和机床夹具设计方法的具体阐述。工艺设计是在学习机械制造技术工艺学及机床夹具设计后，在生产实习的基础上，综合运用所学相关知识对零件进行加工工艺规程的设计和机床夹具的设计，根据零件加工要求制定出可行的工艺路线和合理的夹具方案，以确保零件的加工质量。 据资料所示，推动架是牛头刨床进给机构中的小零件，其主要作用是把从电动机传来的旋转运动通过偏心轮杠杆使推动架绕其轴心线摆动，同时拨动棘轮，带动丝杠转动，实现工作台的自动进给。在设计推动架机械加工工艺过程时要通过查表法准确的确定各表面的总余量及余量公差，合理选择机床加工设备以及相应的加工刀具，进给量，切削速度、功率，扭矩等用来提高加工精度，保证其加工质量。 关键词机械加工、工艺规程、专用夹具、推动架 ABSTRACT This article is about promoti
ng process steps a
nd the machi
ne tool fixture desig
n method of co
ncrete i
n this paper. Process desig
n is i
n lear
ni
ng tech
nology of mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, o
n the basis of productio
n practice, the i
ntegrated use of lear
ned k
nowledge about spare parts for the desig
n of machi
ni
ng process pla
n
ni
ng a
nd machi
ne tool fixture desig
n, i
n accorda
nce with the requireme
nts of parts processi
ng, the feasible process route a
nd reaso
nable fixture scheme, to e
nsure parts processi
ng quality. Accordi
ng to data shows, the push is rack shaper i
nto small parts for the orga
nizatio
n, its mai
n role is to put the rotatio
n moveme
nt comi
ng from the motor with ecce
ntric lever push arou
nd its axis swi
ng, plucked a ratchet wheel at the same time, drive screw rotatio
n, realizes the workbe
nch automatically feed. Whe
n desig
ni
ng drivi
ng frame machi
ni
ng process through the look-up table method to determi
ne the total allowa
nce a
nd allowa
nce tolera
nce of each surface, selectio
n of machi
ne tool processi
ng equipme
nt a
nd correspo
ndi
ng processi
ng cutti
ng tool, feed, cutti
ng speed, power, torque a
nd so o
n to improve machi
ni
ng accuracy, e
nsure the quality of its processi
ng. Key words: Machi
ni
ng, process pla
n
ni
ng, special fixture, To promote 目录 1推动架的工艺分析及生产类型的确定1 1.1推动架的作用1 1.2推动架的技术要求2 1.3推动架工艺分析2 2确定毛坯、绘制毛坯简图3 2.1选择毛坯3 2.2确定毛坯的尺寸公差和机械加工余量3 2.3绘制推动架毛胚的铸造简图4 3、拟定推动架工艺路线4 3.1、定位基准的选择4 3.1.1精基准的选择5 3.1.2粗基准的选择5 3.2各面、孔加工方法的确定5 3.3加工阶段的划分6 3.4工序的集中与分散6 3.5工序顺序的安排6 3.51机械加工工序6 3.52热处理工序6 3.53辅助工序6 3.6确定加工路线7 4机床设备及工艺装备的选用8 4.1机床设备的选用8 4.2工艺装备的选用8 5加工余量、工序尺寸和公差的确定8 6切削用量、时间定额的计算8 6.1切削用量的计算8 6.11钻孔工步9 6.12扩孔工步9 6.13粗铰工步9 6.14精铰工步9 6.2时间定额的计算10 6.21基本时间的计算10 6.22辅助时间的计算11 6.23其他时间的计算11 6.24单件时间的计算12 7夹具设计12 7.1问题的提出12 7.2夹具设计12 7.21定位方案12 7.22夹紧机构13 7.23夹具与机床联接元件13 7.24定位误差分析13 7.25切削力及夹紧力的计算13 8设计体会15 9参考文献16