机械5

摘要 本设计是根据企业指定产品的加工需求，来设计一种与生产线匹配，符合加工技术要求的六工位工作台。本设计主要内容是选择并设计相应的机构，对多工位工作台作总体布局设计，编制工作循环图。该工作台主要任务是要完成工件的上料、注液涂敷、吹干、下料等六道工序，吹干过程占用了三道工序。本设计要求单件工件生产周期为12s，工艺加工的时间不低于2s。该六工位回转工作台采用通过控制步进电机停动的方法来实现工作台的转位和定位，通过控制输入电脉冲的数量和频率来实现工作台的角位移与转速，由步进电机带动转盘来移动工件，将工件夹持转动到相应的工位进行加工。而步进电机本身就带有很好的自锁的功能，对工件进行加工的期间转盘就不会发生转动，保证整个加工过程中定位准确，从而使整个工件加工的质量更好。 关键词：六工位回转工作台；步进电机；定位；自锁； Abstract The graduatio
n project base o
n the dema
nd for the product processi
ng e
nterprises desig
ns a six processi
ng statio
nsworkbe
nchwhich desig
nated to match the desig
n of a productio
n li
ne a
nd fit the tech
nical requireme
nt. The desig
n of the mai
n co
nte
nt is to select a
nd desig
n the appropriate age
ncy, desig
n a multi-positio
n be
nch for the overall layout a
nd draw the cycle diagram. The mai
n task is to complete draw up the material o
n table of thework-piece, i
njectio
n fluid coati
ng, dryi
ng, cutti
ng a
nd other six processes, dryi
ng process takes three processes. The desig
n requireme
nts for cycle of si
ngle-piece productio
n is 12s, craft processi
ng time is
not less tha
n 2s. The six-statio
n rotary tablewith stepper motor by co
ntrolli
ng the stoppi
ng method to achieve tra
nspositio
n table a
nd positio
ni
ng, by co
ntrolli
ng the i
nput
number a
nd freque
ncy of electrical pulses to achieve the a
ngular displaceme
nt a
nd speed table, by a steppi
ng motor drivewheel to move thework-piece, thework-piece holder is rotated to the correspo
ndi
ng processi
ng statio
n. Because the stepper motor itself has a good self-locki
ng fu
nctio
n duri
ng machi
ni
ng of thework-piece, so the tur
ntable occur rotated to e
nsure accurate positio
ni
ng duri
ng the e
ntire process, a
nd so the process for thework-piece has a better quality. Keyword: Six-statio
n rotary table; Stepper motors; positio
ni
ng; self-locki
ng; 目录 1绪论1 1.1回转工作台的研究背景及意义1 1.2回转工作台的历史、现状及应用1 1.3课题的主要任务3 2总体方案设计3 2.1原理方案的设计3 2.2动力的选择5 2.3动力传动方式的选择5 2.4轴承的选用7 3计算分析8 3.1工作台回转运动规律分析8 3.2步进电机启动力矩的计算9 3.3直齿圆柱齿轮的传动设计10 3.3.1、选定齿轮类型、精度等级、材料及齿数10 3.3.2、按齿面接触强度设计10 3.3.3、根据齿根弯曲强度计算11 3.3.4、齿轮几何尺寸13 3.3.5、齿轮验算13 3.3.6、齿轮结构设计尺寸13 3.3.7、第二对齿轮的设计15 3.4支撑轴的设计计算17 3.4.1、选择轴的材料和热处理17 3.4.2、初步估算轴的直径17 3.4.3、轴的结构设计17 3.5滚动轴承的计算分析23 4其他结构的设计24 4.1精密转盘的设计24 4.2底座的设计25 4.3机架的设计25 4.3.1机架设计的准则25 4.3.2机架设计的要求26 4.3.3机架材料的选择26 4.3.4机架结构的设计27 5结论28 谢辞29 参考文献30