adams给齿轮做动力分析,从动轮转速

2025-03-11 11:28:12
推荐回答(1个)
回答1:

一、工作原理:牛头刨床是一种靠刀具的往复直线运动及工作台的间歇运动来完成工件的平面切削加工的机床。下图为其参考示意图。电动机经过减速传动装置(皮带和齿轮传动)带动执行(导杆和凸轮)完成刨刀的往复运动和间歇移动。刨床工作时,刨头6由曲柄2带动右行,刨刀进行切削,称为工作行程。在切削行程H中,前后各有一段0.05H的空刀距离,工作阻力F为常数;刨刀左行时,即为空回行程,此行程无工作阻力。在刨刀空回行程时,凸轮8通过四杆带动棘轮,棘轮带动螺旋使工作台连同工件在垂直纸面方向上做一次进给运动,以便刨刀继续切削。二、设计要求:电动机轴与曲柄轴2平行,刨刀刀刃D点与铰链点C的垂直距离为50mm,使用寿命10年,每日一班制工作,载荷有轻微冲击。允许曲柄2转速偏差为±5%。要求导杆的最大压力角应为最小值;凸轮的最大压力角应在许用值[α]之内,摆动从动件9的升、回程运动规律均为等加速等减速运动。执行构件的传动效率按0.95计算,系统有过载保护。按小批量生产规模设计。三、设计数据四、设计内容及工作量:机械原理部分(第五学期分散一周进行)1、根据牛头刨床的工作原理,拟定2~3个其他形式的执行(连杆),并对这些进行分析对比。2、根据给定的数据确定的运动尺寸。要求用图解法设计,并将设计结果和步骤写在设计说明书中。3、导杆的运动分析。将导杆放在直角坐标系下,建立参数化的数学模型。利用ADAMS分析出刨头6的位移、速度、加速度及导杆4的角速度和角加速度运动曲线,并打印上述各曲线图。要求将参数化建模过程详细地写在说明书中。4、导杆的动态静力分析。通过参数化的建模,细化仿真模型,并给系统加力,写出外加力的参数化函数语句,打印外加力的曲线,并求出最大平衡力矩和功率。5、凸轮设计。根据所给定的已知参数,确定凸轮的基本尺寸(基圆半径ro、机架lO2O9和滚子半径rr),并将运算结果写在说明书中。将凸轮放在直角坐标系下,在ADAMS中建模,画出凸轮的实际廓线,打印出从动件运动规律和凸轮仿真模型。要求将从动件运动规律的IF函数语句写在说明书内。6、编写设计说明书一份。应包括设计任务、设计参数、设计计算过程等。以上工作完成后准备机械原理部分的答辩。机械设计部分(第六学期期末集中三周进行)1、确定传动装置的类型,画出机械系统传动简图。2、选择电动机,进行传动装置的运动和动力参数计算。3、传动装置中的传动零件设计计算。4、绘制传动装置中减速器装配图一张(A0)。5、绘制减速器箱体、齿轮及轴的零件图各一张(A1)。6、编写设计计算说明书一份。完成以上工作后准备机械设计部分的答辩。

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