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Reduction of the Roll-Over of the Sector Tooth for Achieving Improved Recliner Locking Performance

리클라이너 결합 성능 향상을 위한 섹터투스의 롤오버 저감 방법

  • Received : 2010.05.11
  • Accepted : 2010.08.30
  • Published : 2010.11.01

Abstract

In this study, effective forming methods for reducing the roll-over of a sector tooth, which is a main component of an automotive seat recliner, are proposed. Due to the large amount of roll-over, accurate contact between the inner gear of a sector tooth and the outer gear of a pawl tooth cannot be normally achieved; thus sensitivity and safety for the passengers decrease. To overcome the aforementioned drawback, we investigated the effect of flowcontrol forming methods involving local embossing die, coining punch, and VIC (Variable Inverse Clearance) on the roll-over depth by FE-analysis and an experiment. The results of a fine-blanking experiment for verifying the proposed methods showed that VIC type is decidedly superior from the aspects of reduction of roll-over and tool strength of the sector tooth.

Keywords

Recliner;Variable Inverse Clearance;Roll-Over;Sector Tooth;Locking Part

Acknowledgement

Supported by : 부산대학교

References

  1. Ko, D. C., Kim, C., Kim, B. M. and Choi, J. C., 1996, "Finite Element Simulation of Sheet Metal Shearing by the Element Kill Method," J. of KSPE, Vol. 13, No. 11, pp. 114-123.
  2. Woo, C. S., Koo, J. S., Cho, H. J., Kim, H. S. and Jeong, J. S., 2001, "Structual Analysis and Evaluation Technologies of Automotive Seat Frames," Proceedings of KSME (A), pp. 806-811.
  3. Husson, C., Correia, J. P. M., Daridon, L. and Ahzi, S., 2008, "Finite Elements Simulations of Thin Copper Sheets Blanking: Study of Blanking Parameters on Sheared Edge Quality," J. of Materials Processing Technology, Vol. 199, pp. 74-83.
  4. Klocke, F., Sweeney, K. and Raedt, H. W., 2001, "Improved Tool Design for Fine Blanking through the Application of Numerical Modeling Techniques," J. of Materials Processing Technology, Vol. 115, pp. 70-75. https://doi.org/10.1016/S0924-0136(01)00771-3
  5. Kwak, T. S., Kim, Y. J., Seo, M. K. and Bae, W. B., 2003, "The Effective V-ring Indenter on the Sheared Surface in the Fine-Blanking Process of Pawl," J. of Materials Processing Technology, Vol. 143-144, pp. 656-661. https://doi.org/10.1016/S0924-0136(03)00311-X
  6. Kim, B. M., Choi, H. S., Chang, M. J., Bae, J. H., Lee, S. B. and Ko, D. C., 2008, "Development of High Precision Plate Holder in Automotive Seat Recliner by Mechanical Press(I): Application of FCF Method," J. of KSPE, Vol. 25, No. 7, pp. 55-63.
  7. Chang, F. S. and Hallquist, J. O., 1994, "Finite Element Analysis of Low-Density High-Hysteresis Foam Materials and the Application in the Automotive Industry," SAE Int’l, 940908, pp.699-707.
  8. Nagpal, R. and Kuo, E. Y., 1996, “A Time-Domain Fatigue Life Prediction Method for Vehicle Body Structures," SAE Int’l, 960567, pp. 607-616.
  9. Park, Y. S., Lee, J. Y., Lim, J. M. and Park, G. J., 1996, "Optimum Design of the Steering Column to Mini-mize the Injury of an Occupant," Int. J. of Vehicle Design, Vol. 17, No. 4, pp. 398-414.
  10. Kondo, K., Maeda, K., Maeda, A. and Hirota, K., 1994, "Develop of a Simple Precision Shearing Process for Thick Plates," J. of JSTP, Vol. 35, No. 396, pp. 67-72.