Material Removal Model of Center-inlet Elastic Polishing Tools
In order to enhance the deterministic processing capability of computer controlled opti-cal surface(CCOS)forming technology,a center-inlet elastic polishing tool(CEPT)was proposed herein.Based on the structural characteristics of CEPT and the stress field model contacting with the workpieces,the radial contact stress distribution of CEPT before and after attaching diamond resin sandpaper was studied.It is found that after attaching sandpaper,the CEPT has a smoother radial contact stress distribution and a larger contact stress amplitude.Subsequently,the contact stress and velocity distribution functions of CEPT were constructed under continuous feeding conditions,and a material removal model for CEPT was established based on Preston equation.Finally,polishing ex-periments and single factor comparative experiments were conducted to obtain the distribution of ma-terial removal depth and the relationship between key processing parameters and material removal depth of CEPT.The experimental results show that the average deviation between material removal model constructed herein and the actual material removal profile is less than 10％,which may better predict the actual material removal depth of CEPT.
Preston equationelastic toolcentral-inletfinite element methodmaterial removal model
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