Machining deformation of single-sided component based on finishing allowance optimization
| Autor: | Muhammad Jamil, Yinfei Yang, Ning He, Guolong Zhao, Hui Lan, Xiaoyue Li, Longxin Fan, Ding Xiaocen, Liang Li, Shi Yaowen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Aerospace Engineering Mechanical engineering 02 engineering and technology Deformation (meteorology) Residual 01 natural sciences 010305 fluids & plasmas symbols.namesake Residual stresses 020901 industrial engineering & automation Simplex algorithm Residual stress Linear programming 0103 physical sciences Gaussian function Machining deformation Motor vehicles. Aeronautics. Astronautics Finishing allowance Mechanical Engineering Allowance (engineering) TL1-4050 Clamping symbols Reduction (mathematics) |
| Zdroj: | Chinese Journal of Aeronautics, Vol 33, Iss 9, Pp 2434-2444 (2020) |
| ISSN: | 1000-9361 |
| Popis: | Owing to reliability and high strength-to-weight ratio, large thin-walled components are widely used in the aviation and aerospace industry. Due to the complex features and sequence involved in the machining process of large thin-walled components, machining deformation of component is easy to exceed the specification. In order to address the problem, it is important to retain the appropriate finishing allowance. To find the overall machining deformation, finishing allowance-induced deformation (web finishing allowance, sidewall finishing allowance) and initial residual stress-induced deformation were considered as major factors. Meanwhile, machined surface residual stress-induced deformation, clamping stress-induced deformation, thermal deformation, gravity-induced deformation and inertial force-induced deformation were neglected in the optimization model. Six-peak Gaussian function was introduced to fit the initial residual stress. Based upon the obtained function of initial residual stress, a deformation prediction model between initial residual stress and finishing allowance was established to attain the finishing allowance-induced deformation. In addition, linear programming optimization model based on the simplex algorithm was developed to optimize the overall machining deformation. Results have concluded that the overall machining deformation reached the minimum value when sidewall finishing allowance and web finishing allowance varied between 1 and 2 mm. Additionally, web finishing allowance-induced deformation and sidewall finishing allowance-induced deformation were 1.05 mm and 0.7 mm. Furthermore, the machining deformation decreased to 0.3–0.38 mm with the application of optimized finishing allowance allocation strategy, which made 39–56% reduction of the overall machining deformation compared to that in conventional method. |
| Databáze: | OpenAIRE |
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