Research on the double-sided incremental forming toolpath planning and generation based on STL model
In order to take the advantages of the double-sided incremental forming (DSIF) that can freely switch the pressing and supporting functions of the two tools and realize the forming of the sheet parts with protruding features in both the positive and negative directions of the sheet (the sheet part with bidirectional protruding feature), a method for the double-sided incremental forming based on the stereo lithographic (STL) model was proposed. The method first classifies the forming features according to the protruding direction and the position relationship of the model into the different types of the features to be formed. The main forming surface and the supporting surface are determined by the types of the forming features, and the pressing and supporting tasks of the main tool and slave tool heads are assigned. Then, the cutter location points of the main tool and slave tool are generated, and the toolpath of the main tool and slave tool are planned out according to the forming sequence and the forming methods of the different forming features. Finally, a method of the interference detection and correction between the forming tool head and the sheet part is proposed. The finite element numerical simulation and the forming experiments of the sheet part with bidirectional protruding features show that the proposed toolpath generation method for the DSIF is applicable; the DSIF toolpath generated based on the STL model can fabricate the sheet part with the bidirectional protruding feature.
KeywordsIncremental forming Double-sided incremental forming Feature recognition Toolpath generation STL model
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The authors gratefully acknowledge the financial support from the Natural Science Foundation of Liaoning Province (No. 2014024011).
- 1.Li YL, Chen XX, Liu ZB, Sun J, Li FY, Li JF, Zhao GQ (2017) A review on the recent development of incremental sheet-forming process. Int J Adv Manuf Technol 92(5-8): 2439–2462Google Scholar
- 9.Malhotra R, Cao J, Ren F, Kiridena V, Xia ZC (2011) Improvement of geometric accuracy in incremental forming by using a pressing toolpath strategy with two forming tools. Int Manuf Sci Eng Conf 603–611Google Scholar
- 12.Lingam R, Srivastava A, Reddy NV (2016) Deflection compensations for tool path to enhance accuracy during double sided incremental forming. J Manuf Sci Eng 138(9):091008–1–091008–11Google Scholar
- 13.Bhattacharya A, Singh S, Maneesh K, Reddy NV, Cao J (2011) Formability and surface finish studies in single point incremental forming. Int Manuf Sci Eng Conf 621–627Google Scholar
- 14.Wang Y, Huang Y, Cao J, Reddy NV (2008) Experimental study on a new method of double side incremental forming. Int Manuf Sci Eng Conf 601–607Google Scholar
- 15.Wu J H (2014) Numerical simulation and experimentation of two-sided incremental forming. Dissertation, Zhejiang University of TechnologyGoogle Scholar
- 16.Zhang RF, Lu B, Chen J (2016) Development of a multi-pass double side incremental forming strategy for forming complex sheet metal parts with a step feature. J Shanghai Jiaotong Univ 50(9):1333–1338Google Scholar
- 17.Fang Y (2015) The investigation of deformation mechanism and process in double side incremental sheet forming. Dissertation, Shanghai Jiao Tong UniversityGoogle Scholar
- 19.Zhu H, Han FC (2018) Determination of the pressing tool posture in the 5-axis CNC incremental forming. Forging Stamping Technol 42(11):84–88Google Scholar
- 20.Ren H, Moser N, Zhang Z, Ehmann K F, Cao J (2016) Effects of tool deflection in accumulated double-sided incremental forming regarding part geometry. Int Manuf Sci Eng Conf V001T02A069Google Scholar