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Journal:   MODARES MECHANICAL ENGINEERING   FEBRUARY 2015 , Volume 14 , Number 13; Page(s) 217 To 223.
 
Paper: 

Polishing Of Spherical Lenses Using Spherical Tool Ona 3-Axis Cnc Machine

 
 
Author(s):  Hashemi Seyed Hosein, Mosaddegh Peiman*, Koosha Rasoul
 
* DEPARTMENT OF MECHANICAL ENGINEERING, ISFAHAN UNIVERSITY OF TECHNOLOGY, ISFAHAN, IRAN
 
Abstract: 
Polishing is considered as the last and most important step in the manufacturing of optical components. Computer control polishing (CCP) methods are usually used to polish complex surfaces. In this method, material removal is controlled at each point, depending on error at that point. In contact polishing mechanism, tool feed rate is often controlled to eliminate local errors. It means that the higher the tool feed rate, the lower the material removal would be and vice versa. Tool influence function (TIF), which is defined as the instantaneous material removal under the polishing tool for a given tool motion, is the most important parameter in CCP and its predictability during the polishing process leads to reliable result. In this study, a new spherical tool which can polish complex surfaces by using a 3-axis CNC machine is presented. Because of spherical geometry of both tool and work piece, tool, material removal rate is variable because of changing the angle between tool axis and surface normal vector which leads to variation of relative speed. Tool influence function which depends on tool engagement’s angle was modeled based on Preston equation. Moreover, the simulation is modeled based on discretization of tool path. To evaluate the methodology, some polishing experimental tests were performed. The experimental results show that a 130 mm spherical convex lens with initial surface roughness of 1.114 micrometer for PV was decreased to 395 nm for PV using the CCP method developed in this study.
 
Keyword(s): COMPUTER CONTROL POLISHING, TOOL INFLUENCE FUNCTION, FEED RATE CONTROL METHOD, SPHERICAL LENS, SPHERICAL TOOL
 
 
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APA: Copy

HASHEMI, S., & MOSADDEGH, P., & KOOSHA, R. (2015). POLISHING OF SPHERICAL LENSES USING SPHERICAL TOOL ONA 3-AXIS CNC MACHINE. MODARES MECHANICAL ENGINEERING, 14(13), 217-223. https://www.sid.ir/en/journal/ViewPaper.aspx?id=421187



Vancouver: Copy

HASHEMI SEYED HOSEIN, MOSADDEGH PEIMAN, KOOSHA RASOUL. POLISHING OF SPHERICAL LENSES USING SPHERICAL TOOL ONA 3-AXIS CNC MACHINE. MODARES MECHANICAL ENGINEERING. 2015 [cited 2022May29];14(13):217-223. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=421187



IEEE: Copy

HASHEMI, S., MOSADDEGH, P., KOOSHA, R., 2015. POLISHING OF SPHERICAL LENSES USING SPHERICAL TOOL ONA 3-AXIS CNC MACHINE. MODARES MECHANICAL ENGINEERING, [online] 14(13), pp.217-223. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=421187.



 
 
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