Browse > Article

A study on the factors influencing at corner area material thickness changes of rectangular drawing products  

Yun, Jae-Woong (Department of Metal Mold Design Engineering, Kongju National University)
Cho, Sang-Hee (Department of Metal Mold Design Engineering, Kongju National University)
Lee, Chun-Kyu (Department of Metal Mold Design Engineering, Kongju National University)
Publication Information
Design & Manufacturing / v.14, no.1, 2020 , pp. 22-29 More about this Journal
Abstract
The analysis was carried out using the press molding analysis program by applying six parameters such as material type change, material thickness, friction coefficient, rp, rd and blank holder pressure. As a result of CAE analysis of the soft material DC04 and the relatively hard material HX300LAD, the thickness of the punch R part of the soft material was significantly reduced. The flange portion is greatly increased in thickness in the hard material by the compression action. As a result of considering the deformation amount of 0.6mm, 1.0mm, 1.5mm according to the material thickness, the influence of the thickness is considered to be very small. In case of the material thickness of 0.6mm, the rate of change increases due to the deep drawing depth relative to the material thickness. The sizes of the punches R and die R have the greatest influence on the change in thickness of the material in drawing molding, the smaller the punch R, the thinner the edges of the product, The larger the R of the die, the greater the material thickness of the flange portion. As the coefficient of friction and the blank holder pressure increase, the frictional force of the flange portion increases, which increases the radial force in the drawing process and increases the thickness change of the flange portion.
Keywords
Blank holder pressure; Coefficient of friction; DC04; Die radius; HX300LAD; Punch radius;
Citations & Related Records
연도 인용수 순위
  • Reference
1 D. H. Kim, "Experimental Study on Minimizing Wall Thickness Thinning for Deep Drawing of Circular Shells", Journal of the Korean society for technology of plastics Vol. 7 No. 4, pp 393-399, 1998.
2 D. H. Kim, "Experimental Study on Minimizing Wall Thickness Thinning for Deep Drawing of Circular Shells", Journal of the Korean society for technology of plastics Vol. 7 No. 4, pp 393-399, 1998.
3 D. W. Jung, H. I. Yang, and S. H. Lee, "Experimental Study on the Parameters Affecting Deep Drawing Process", Journal of the Korean Society for Power System Engineering, Vol. 7, No. 2, pp.61-65, 2003.
4 C. K. Lee, S. D. Nam, "A Study on the Influence of the Integrated Structure and Independent of the Die Pad on the Products thickness in the Drawing Process" Journal of the Korea safety management & science, Vol. 17, No. 2, pp.235-240, 2015.   DOI
5 C. K. Lee, "Influences of the die pad and the ironing process on a side wall thickness and concentricity of the product during multi-stage drawing", Journal of the Korean Society of Mechanical Technology, Vol. 17, No. 6, pp.1285-1291, 2015.   DOI
6 J. M. Lee, J. H. Kim, and S. T. Won, "Influence of Process Design Scheme on Product Qualities in Cylindrical Cup Drawing", Journal of the Korean society for technology of plastics, Vol. 11, No. 8, pp.716-723, 2002.