Study on the orthomogonalization for hybrid motion/force control and its application in aspheric surface polishing

By the hybrid movement/force control policy, machining force could be controlled in aspheric surface polishing. However, the controller could not eliminate and restrain the errors of position and pose which would disturb the force controll consequentially in real system. In this paper, an angle is defined to express all the errors of position and pose for aspheric surface polishing, and the errors are modeled for machining force controll. By detecting this angle, the errors of position and pose could be used by the system controller to eliminate the disturbance in hybrid movement/force controll system and compensate feed movement controll in aspheric surface polishing. Simulation shows that the model could effectively express the errors of position and pose .

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Computer numeric control subaperture aspheric surface polishing—microroughness evaluation

Optical Engineering ◽

10.1117/1.oe.53.9.092011 ◽

2014 ◽

Vol 53 (9) ◽

pp. 092011 ◽

Cited By ~ 3

Author(s):

Frantisek Prochaska ◽

Jaroslav Polak ◽

Ondrej Matousek ◽

David Tomka

Keyword(s):

Aspheric Surface ◽

Surface Polishing ◽

Computer Numeric Control

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Fundamental Investigation on the Polishing Aspheric Elements with Doughnut-Shaped MCF Slurry

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.792.179 ◽

2018 ◽

Vol 792 ◽

pp. 179-184 ◽

Cited By ~ 4

Author(s):

Ming Feng ◽

Yong Bo Wu ◽

Teruo Bitoh ◽

Tsunehisa Suzuki ◽

Mitsuyoshi Nomura ◽

...

Keyword(s):

Experimental Result ◽

Aspheric Surface ◽

Aspheric Surfaces ◽

Variable Parameters ◽

Flat Surfaces ◽

Surface Polishing ◽

Fundamental Investigation ◽

Novel Method ◽

Curve Radius ◽

Polishing Tool

Previous researches have confirmed that MCF (magnetic compound fluid) slurry shows outstanding performance in the nanoprecision polishing of flat surfaces and V-grooves. However, no investigations have been conducted on the polishing of aspheric surfaces using MCF slurry. In this work, a novel method employing a doughnut-shaped MCF polishing tool and a 6-DOF manipulator has been proposed for the aspheric surface polishing. The time consumption for forming stable polishing tool and its final appearance are investigated. Flat aluminum alloy workpieces that can be considered as a kind of aspheric elements with infinite curve radius were adopted in the investigation of the polished forces under variable parameters. As a typical experimental result, with MCF3 slurry, 2.5ml volume of supplied slurry and work gap 3.5 mm, the surface roughness Ra decreases from 125nm to almost 10nm after 90 min polishing, confirming that the proposed method has the potential to polish aspheric surfaces.

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