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Analysis of the Bottom Groove in L-shaped Profile Ring Rolling

L형상 프로파일 링롤링 공정의 하부면 그루브 결함 분석

  • Received : 2018.05.23
  • Accepted : 2018.08.22
  • Published : 2018.10.01

Abstract

The profile ring rolling process can realize various ring shapes unlike conventional rectangular cross-sectional ring products. In this paper, the defective groove in the bottom surface of L-shaped ring products was analyzed. Grooves are generated by non-uniform external forces due to profile main roll and initial blank shape. Process parameters such as the motion of dies and working temperature were determined. Mechanism of groove formation was analyzed by FE simulation on the basis of local external forces acting on the blank. Analysis results were similar to the groove actually occurring in the production line. Based on results of the analysis, two solutions were proposed for the groove. The position of the base plate supporting the blank was adjusted and edge length of the main roll was extended to suppress growth of grooves. It has been verified that groove was improved by applying two proposed methods in the shop-floor.

Keywords

References

  1. Z. W. Wang, S. Q. Zeng, X. H. Yang, C. Cheng, 2007, The Key Technology and Realization of Virtual Ring Rolling, J. Mater. Process. Technol., Vol. 182, No. 1-3, pp. 374-381. https://doi.org/10.1016/j.jmatprotec.2006.08.020
  2. Z. M. Hu, I. Pillinger, P. Hartley, S. McKenzie, P. J. Spence, 1994, Three-dimensional Finite-element Modelling of Ring Rolling, J. Mater. Process. Technol., Vol. 45, No. 1-4, pp. 143-148. https://doi.org/10.1016/0924-0136(94)90332-8
  3. J. B. Hawkyard, W. Johnson, J. Kirkland, E. Appleton, 1973, Analyses for Roll Force and Torque in Ring Rolling, with some Supporting Experiments, Int. J. Mech. Sci., Vol. 15, No. 11, pp. 873-893. https://doi.org/10.1016/0020-7403(73)90018-0
  4. K. H. Kim, H. G. Suk, M. Y. Huh, 2007, Development of the Profile Ring Rolling Process for Large Slewing Rings of Alloy Steels, J. Mater. Process. Technol., Vol. 187-188. pp. 730-733. https://doi.org/10.1016/j.jmatprotec.2006.11.040
  5. K. H. Lee, 2014, Design Method for Intermediate Roll in Multi-stage Profile Ring Rolling Process: The Case for Excavator Idler Rim, Int. J. Precis. Eng. Manuf., Vol. 15, No. 3, pp. 503-512. https://doi.org/10.1007/s12541-014-0364-3
  6. D.Y. Yang, K. H. Kim, J. B. Hawkyard, 1991, Simulation of T-section Profile Ring Rolling by the 3-D Rigid-plastic Finite Element Method, Int. J. Mech. Sci. Vol. 33, No. 7, pp. 541-550. https://doi.org/10.1016/0020-7403(91)90016-V
  7. D. Qian, J. Deng, S. He, 2018, Precision Rolling Methods for Groove-section Ring based on Different Contact and Feed Mode, Int. J. Adv. Manuf. Technol., Vol. 95, pp. 3953-3968. https://doi.org/10.1007/s00170-017-1512-6
  8. S. Husmann, B. Kuhlenkotter, 2017. Investigation for an Automated Avoidance of Ring Climbing in Radial-Axial Ring Rolling, Procedia Eng., Vol. 207, pp. 1242-1247. https://doi.org/10.1016/j.proeng.2017.10.877
  9. R. P. Guo, L. Xu, B. Y. Zong, R. Yang, 2016, Preparation and Ring Rolling Processing of Large Size Ti-6Al-4V Powder Compact, Mater. Des., Vol. 99, pp. 341-348. https://doi.org/10.1016/j.matdes.2016.02.128
  10. C. Wang, H. J. Geijselaers, E. Omerspahic, V. Recina, A. H. van den Boogaard, 2016, Influence of Ring Growth Rate on Damage Development in Hot Ring Rolling, J. Mater. Process. Technol., Vol. 227, pp. 268-280. https://doi.org/10.1016/j.jmatprotec.2015.08.017
  11. A. Parvizi, K. Abrinia, 2014, A Two Dimensional Upper Bound Analysis of the Ring Rolling Process with Experimental and FEM Verifications. Int. J. Mech. Sci., Vol. 79, pp. 176-181. https://doi.org/10.1016/j.ijmecsci.2013.12.012