共查询到20条相似文献,搜索用时 46 毫秒
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凸轮数控磨床速度计算与分析 总被引:1,自引:0,他引:1
推导了凸轮数控磨床速度的计算公式,分析比较了恒线速度和恒角速度两种磨削方式的磨削参数,从而了恒成于恒角速度磨削的结论,为凸轮数控磨床速度程序设计提供了理论依据。 相似文献
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平面凸轮曲线的等线速度数控磨削方法 总被引:2,自引:0,他引:2
在极坐标式NC磨床上磨削封闭式凸轮轮廓曲线时,凸轮的半径变化率和砂轮的大直径是影响磨削质量的主要因素。为了解决砂轮干涉及磨削点处线速度变化影响磨削表面粗糙度的问题,提出了极坐标下砂轮磨削点轨迹的等步长插补方法。该方法可用于任何具有C^1连续性的正则曲线。 相似文献
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从限制磨削力和最大振纹峰值变化的角度提出了变速磨削的概念,并推导了实现“恒磨削力磨削”时磨床主轴的变速规律,且针对M8318凸轮磨床的数字化改造进行了探讨,用定步法实现了步进电机控制系统的软件设计,并给出了硬件的结构框图,从而得出了整个系统的实现方案。 相似文献
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在对凸轮磨削动态特性影响进行分析之后,从凸轮轮廓曲线的形成,制造凸轮靠模的过程,论述了在凸轮磨削过程中,如何排除机床动态特性影响的新方法. 相似文献
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介绍了一种基于UG的新型平面凸轮磨削方法便是在这个基础上提出的,并成功开发了针对平面凸轮磨削的专用机床.该机床较传统的凸轮加工有更高的精度与效率,较低的加工成本,有很大的经济效益. 相似文献
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模糊综合决策在凸轮机构设计中的应用 总被引:1,自引:0,他引:1
介绍了在凸轮机构设计中,运用模糊综合决策的方法进行凸轮机构类型的选择,从动件运动规律的选择和凸轮机构材料的选择。并由此指出,在机械设计的方案确定、参数选择中,模糊综合决策是一种切实可行的方法。 相似文献
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This paper proposes a sliding mode controller with fuzzy adaptive perturbation compensator (FAPC) to get a good control performance
and reduce the chatter. The proposed algorithm can reduce the chattering because the proposed fuzzy adaptive perturbation
compensator compensates the perturbation terms. The compensator computes the control input for compensating unmodeled dynamic
terms and disturbance by using the observer-based fuzzy adaptive network (FAN). The weighting parameters of the compensator
are updated by on-line adaptive scheme in order to minimize the estimation error and the estimation velocity error of each
actuator. Therefore, the combination of sliding mode control and fuzzy adaptive network gives the robust and intelligent routine
to get a good control performance. To evaluate the control performance of the proposed approach, tracking control is experimentally
carried out for the hydraulic motion platform which consists of a 6-DOF parallel manipulator. 相似文献
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This paper presents a motion coordination of a two-cooperating robot arm when there are unknown system parameters and bounded
input disturbances. The order of the model of the two-arm system is reduced. To control this, a force/position control scheme
based on an inverse dynamics control scheme is devised. On the top of the control scheme, an adaptive control scheme to take
care of parametric uncertainties, and a robust control scheme to compensate coupling forces between two arms and input disturbances
are devised. The adaptive and the robust control scheme are derived based on a devised Lyapunov function. The adaptive control
algorithm is practical since it does not require the feedback of the second derivative of joint angles and interacting forces.
The robust control scheme guarantees that the tracking error of the leader arm and the interacting forces between two arms
are confined in a certain region. Numerical examples using dual 3 degree of freedom robot arm are shown. 相似文献
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A degree of sharpness in wheel grains affects the surface roughness and dimensional accuracy in the grinding process. If a
wheel with dull grains is used, the grinding force is increased and the surface roughness is deteriorated. In ovder to produce
a precision component economically, the magnitude of the wear amount in the grinding wheel has to be limited. In this study,
experimental evaluation of a wheel life varying with the grinding ratio and static grinding force was conducted. The grinding
ratio and grinding force were measured to seek the grinding performance of the WA wheel. The relationship between the grinding
ratio and static grinding force was presented. 相似文献