Kinematic Analysis and Design for a 4urhu-1urhr Parallel Kinematic Polishing Machine

Li, Bing; Lin, Weiyang; Yang, Xiaojun; Deng, Zongquan

doi:10.1142/9789814329927_0117

Cited by 2 publications

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“…It has been described extensively elsewhere in the literatures [26][27][28]. The parallel manipulator is a closed mechanical structure, and it has high stiffness, low inertia, and high dynamic performance.…”

Section: Methodsmentioning

confidence: 99%

Path planning of mechanical polishing process for freeform surface with a small polishing tool

Lin

et al. 2014

Robot. Biomim.

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Products with freeform surface are widely applied in industries, and the surface quality plays an important role in order to fulfill the targeted functions. As polishing path of small polishing tool affects the polishing removal function considerably, it is highly necessary to study the polishing path of freeform surface for obtaining good polishing efficiency and well-proportioned surface quality. By combining the Preston polishing removal function, the material removal model of small polishing tool under the control of constant polishing force and pressure is established. Based on this model, the material removal functions of scan line, Archimedean spiral, and Hilbert fractal polishing path are derived. The simulation results show that the Hilbert fractal polishing path has the best comprehensive performance. By using the projection relation of differential geometry, the optimal path generation algorithm of the Bézier surface based on Hilbert fractal polishing path is established. The polishing experiments are conducted on a self-developed polishing machine which is based on a parallel manipulator. The experimental results demonstrate that the surface roughness is improved from level 9 to level 11.

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Section: Methodsmentioning

confidence: 99%

Path planning of mechanical polishing process for freeform surface with a small polishing tool

Lin

et al. 2014

Robot. Biomim.

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“…Generally, the errors of polishing velocity decided by the control system are not very large in the actual polishing process [11,12]. However, the polishing force may change a lot instantaneously due to a little variation of impact between the polishing tool and the workpiece.…”

Section: Introductionmentioning

confidence: 99%

Design and constant force control of a parallel polishing machine

Lin

et al. 2014

2014 4th IEEE International Conference on Information Science and Technology

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In order to improve the low efficiency, poor product consistency and cruel working environment of current manual polishing method, a parallel polishing machine is presented. First, based on the freeform surface polishing requirement, a scheme of the automatic polishing machine is proposed, which includes a five-DOF parallel manipulator, a single DOF rotary table and a linear motion platform with a force feedback system. Next, a polishing force control model of the linear motion platform is established. Fractional order PI λ D μ control method is introduced to achieve force-displacement hybrid control. Finally, the parallel polishing machine is developed and a constant force polishing experiment is conducted. The experimental results display that parallel polishing machine is capable of improving the roughness of the surface of the manufactured part from level 9 precision to level 11 precision.Index Terms -parallel manipulator; automatic polishing system; constant force polishing control; fractional order PI λ D μ controller

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Kinematic Analysis and Design for a 4urhu-1urhr Parallel Kinematic Polishing Machine

Cited by 2 publications

References 0 publications

Path planning of mechanical polishing process for freeform surface with a small polishing tool

Path planning of mechanical polishing process for freeform surface with a small polishing tool

Design and constant force control of a parallel polishing machine

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