Study of the influence of tool rake angle in ductile machining of optical quartz glass
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The SPH simulation model of optical quartz glass was established to study the ductile machining process with different tool rake angles. The material removal mode, stress distribution, cutting force, and subsurface damage during machining were analyzed. The critical cutting depths of brittle-ductile transition under different tool rake angles were obtained. The simulation results show that the tool negative rake angle is better than the positive rake angle in promoting the ductile machining of optical quartz glass. When the tool rake angle is negative, significant compressive stress which suppresses the crack generation by reducing the stress intensity factor KI is generated in the chip forming area, thus realizing the ductile machining of optical quartz glass. The greater the tool negative rake angle is, the more stable the cutting force and the greater the critical cutting depths of brittle-ductile transition are. When the tool negative rake angle is greater than − 35°, the subsurface damage of the optical quartz glass is aggravated, and the subsurface residual stress is complicated. When the tool negative rake angle ranges from − 15° to − 35°, the optical quartz glass is not only machined in a stable ductile region but also has less subsurface damage. Finally, nano-scratch experiments were carried out, and the critical depths of the brittle-ductile transition obtained by the experiments are basically consistent with the simulation results, which verify the correctness of the simulation results. The research results in this paper could provide a theoretical basis for the optimal selection of tool rake angle in the ductile machining of optical quartz glass.
KeywordsOptical quartz glass SPH Ductile machining Brittle-ductile transition Subsurface damage
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (General Program) (No. 51575083), the Key Program of the National Natural Science Foundation of China (No. 51735004) and Fundamental Research Funds for the Central Universities (DUT19LAB15).
- 1.Chi HJ, Gao X, Zhao DF, Lin JQ (2014) Study on influence of HF acid treatment on 355 nm laser damage of quartz glass [J]. Laser Infrared 44(09):987–990 (in Chinese)Google Scholar
- 5.Zhang YZ, Pi J (2013) Advances in the Research on ductile regime machining of brittle materials [J]. J Jimei Univ (Nat Sci) 18(1):38–47 (in Chinese)Google Scholar
- 7.Wu HB, Zuo DW, Sun QP, Xu F, Sun YL (2015) Research on ductile regime milling of fully sintered dental zirconia [J]. Trans Beijing Inst Technol 35(9):902–907 (in Chinese)Google Scholar
- 9.Guo B, Zhao QL (2015) Wheel normal grinding of hard and brittle materials [J]. Int J Adv Manuf Technol 79(5–8):1–8Google Scholar
- 12.Xiang Y, Chen J, Bai MS, Ren J, Zhang JK (2014) Experimental study of brittle-ductile translation critical conditions in Li2 O-Al2 O3-SiO2 glass-ceramic machining [J]. J Appl Opt 35(3):500–504 (in Chinese)Google Scholar
- 13.Ma LJ, Wang H, Gu LC, Shan Q, Yang JY, Yu AB (2016) Study on the surface critical conditions of engineering ceramics [J]. New Technol New Process (3):94–96 (in Chinese)Google Scholar
- 14.Wang Y, Wang S, Liu JG, Xiong W (2015) Dynamic simulation of single abrasive grain cutting TC4 based on SPH method [J]. J Syst Simul 27(11):2865–2872 in ChineseGoogle Scholar
- 16.Lu CY, He J, Li HW, Wang QJ, Zheng ZQ, Zhang XC (2014) Simulation of soil cutting process of plane knife based on SPH algorithm [J]. Trans Chin Soc Agric Mach 45(8) (in Chinese)Google Scholar
- 17.Li J (2015) Research on characteristics of the transition of ductile-brittle in laser and ultrasonic vibration assisted cutting of hard alloy [D].Henan Polytechnic University. (in Chinese)Google Scholar