Infrared and Laser Engineering, Volume. 52, Issue 7, 20220888(2023)
Turning method for correcting centrifugal force error of large-diameter off-axis aspheric surface
Figures & Tables(11)
Fig. 2. (a) Machining process and (b) processing results of aluminum alloy off-axis aspheric mirror
Fig. 3. Centrifugal force deformation process. (a) Initial blank surface shape; (b) Centrifugal force loading elastic deformation; (c) Turning process; (d) Centrifugal force unloading elastic recovery
Fig. 4. Off-axis aspheric processing model. (a) Traditional processing model; (b) Suppression centrifugal force coordinate transformation machining model
Fig. 6. Simulation results of centrifugal force deformation. (a) Simulation result; (b) The lowest point
Fig. 7. Off-axis aspheric surface morphology. (a) Traditional processing model; (b) Suppression centrifugal force coordinate transformation machining model
Fig. 8. (a) Physical map and (b) test result of off-axis aspheric surface aluminum alloy
Table 1. Off-axis aspheric surface parameters
View tableView in ArticleTable 1. Off-axis aspheric surface parameters
k R/mm D/mm H/mm B1，B2，··· −0.998578576 1968.080 320 600 0
Table 2. Johnson-Cook intrinsic model of 6061 aluminum alloy material
View tableView in ArticleTable 2. Johnson-Cook intrinsic model of 6061 aluminum alloy material
ρ/kg·m–3 $ v $ A/MPa B/MPa n C m ${C}_{p}/{\rm{J} }\cdot { {\rm{kg} } }^{-1}\cdot { {\rm{K} } }^{-1}$ 2700 0.33 110 256 0.34 0.015 1.0 896
Table 3. Processing parameters of SPDT
View tableView in ArticleTable 3. Processing parameters of SPDT
Parameter Value Feed rate/μm·rev–1 3 Spindle speed/r·min–1 180 Depth of cut/μm 3 Tool radius/mm 0.95 Materials RSA6061
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Peng Song, Yang Bai, Chao Yang, Chuang Li, Changxi Xue, Jiawen Ding, Jie Guo. Turning method for correcting centrifugal force error of large-diameter off-axis aspheric surface[J]. Infrared and Laser Engineering, 2023, 52(7): 20220888
Paper Information
Category: Optical fabrication
Received: Dec. 15, 2022
Accepted: --
Published Online: Aug. 16, 2023
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