Bending properties of GCr15 steel guide rail under the multi-step loading

Abstract

To analyze the bending properties of GCr15 steel guide rail based on the elastic-plastic theory, the novel bending loading method consisting of multi-step loading and corresponding unloading was applied in three specimens with different cross section shape and different heat treatment condition. According to the experimental results, using numerical calculation software program and the numerical simulation with finite element analysis (FEA), the relationships among the maximal load and displacement on cross section shape with each step bend loading, the loading stroke with the heat treatment condition, and the loading stroke with cross section shape were gained, and also those curves were discussed qualitatively. Finally, the contrast results between the numerical simulation and experiment were carried out to study the influence about the multi-step loading on specimen. It is put forward that enlightenment for the straightening stroke in the precision linear guide rail manufacture process.

Keywords

bending properties / guide rail / multi-step loading / stress-strain curve / elastic modules

References

[1] Liu Q., Li S. A Study of m-δ Relation of Superplasticity of GCr15 Steel[J]. Journal of Shanghai Jiaotong University, 1984, 1(1): 12-15.

[2] Chen K. Study on and Analysis of Heat Rectifying of Guideways with Inlaid GCr15[J]. Manufacturing Technology & Machine Tool, 2006, 9(1): 107-109.

[3] Lu H., Zhang X., Juergen L., . Straightening Model and Prediction of Straightening Stroke of Precision Linear Guide Rail[C]. ICIRA 2008, Part II, LNAI5315, 2008 Wuhan Springer 321-328.

[4] Liu L. Study On the Straightening Load Model of Shaft Part[D], 2006 Changchun Jilin University

[5] Qin M., Ke Z., Jiang S., . Study On Straightening Technical Theory of Shaftkind in Exact Straightening Press[J]. Journal of Mechanical Engineer, 1997, 33(2): 48-53.

[6] Li J. Research On Theoretical Model of Press Straightening Process and Its Experiment[J]. Journal of Mechanical Strength, 2005, 27(5): 636-639.

[7] Kim S.-c., Chung S.-chong. Synthesis of the Multi — Step Straightening Control System for Shaft Straightening Processes[J]. Mechatronics, 2002, 12(1): 139-156.