摘要
合适的压力机工作机构可以改善滑块运动性能,提高工作机构增力比,降低电动机容量,提高伺服压力机性能,降低成本。以增力比较大的肘杆机构为对象,分析了曲柄滑块、普通直线连杆-等长肘杆和三角连杆-不等长肘杆3种机构的工作特性,建立其运动学模型。以4000kN伺服压力机为例,采用MATLAB进行了运动学-动力学仿真分析。分析结果表明,三角连杆-不等长肘杆具有更好的动力学和运动学特性:在同等公称压力条件下,三角连杆机构所需曲柄转矩比曲柄连杆机构减少了88.7%,比直线连杆-等长肘杆的输入转矩减少了70.6%。
The working mechanism suitable for press can be used to improve the kinetic characteristics of the slide and the ratio of the mechanism gains and reduce the motor capacity, thus improving the performance of the press and reducing the cost. This paper takes the knuckle mechanisms with the ratio of big gains as object, then analyzes the working properties of strait crank block, link-knuckle and triangle link-knuckle mechanisms and builds their mathematic models. Taking 4000 kN servo presses as example, the numerical simulations are conducted. The simulation results show that the triangle link-knuckle mechanism has better kinetic-dynamic characteristics. In comparison with common strait crank block mechanism, the required torque is reduced by 88.7%;in comparison with common strait link-knuckle mechanism, the required torque is reduced by 70.6%.
作者
方雅
郭君扬
FANG Ya;GUO Junyang(Henan Polytechnic Institute, Nanyang 473000, China)
出处
《机械制造与自动化》
2019年第4期65-68,共4页
Machine Building & Automation
关键词
伺服压力机
增力比
运动学
公称压力
servo press
ratio of gains
kinematics
nominal pressure
