각통드로잉 제품의 모서리 재료두께 변화에 영향을 미치는 인자에 대한 해석 연구

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

The analysis was carried out using the press molding analysis program by applying six parameters such asmaterial type change, material thickness, friction coefficient, rp, rd and blank holder pressure. As a result of CAEanalysis of the soft material DC04 and the relatively hard material HX300LAD, the thickness of the punch R part of thesoft material was significantly reduced. The flange portion is greatly increased in thickness in the hard material by thecompression action. As a result of considering the deformation amount of 0.6mm, 1.0mm, 1.5mm according to thematerial thickness, the influence of the thickness is considered to be very small. In case of the material thickness of0.6mm, the rate of change increases due to the deep drawing depth relative to the material thickness. The sizes of thepunches R and die R have the greatest influence on the change in thickness of the material in drawing molding, thesmaller the punch R, the thinner the edges of the product, The larger the R of the die, the greater the material thicknessof the flange portion. As the coefficient of friction and the blank holder pressure increase, the frictional force of theflange portion increases, which increases the radial force in the drawing process and increases the thickness change of theflange portion.

The analysis was carried out using the press molding analysis program by applying six parameters such asmaterial type change, material thickness, friction coefficient, rp, rd and blank holder pressure. As a result of CAEanalysis of the soft material DC04 and the relatively hard material HX300LAD, the thickness of the punch R part of thesoft material was significantly reduced. The flange portion is greatly increased in thickness in the hard material by thecompression action. As a result of considering the deformation amount of 0.6mm, 1.0mm, 1.5mm according to thematerial thickness, the influence of the thickness is considered to be very small. In case of the material thickness of0.6mm, the rate of change increases due to the deep drawing depth relative to the material thickness. The sizes of thepunches R and die R have the greatest influence on the change in thickness of the material in drawing molding, thesmaller the punch R, the thinner the edges of the product, The larger the R of the die, the greater the material thicknessof the flange portion. As the coefficient of friction and the blank holder pressure increase, the frictional force of theflange portion increases, which increases the radial force in the drawing process and increases the thickness change of theflange portion.