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7
Prismatic drawn part
7.1
Drawing force on the straight drawn part side
203 Articles  2254 Elements

Drawing force on the straight drawn part side

7.1
Prismatic drawn part
Fig. 1
Deformation zones during prismatic deep drawing
1 Corner area 2 Transition zone 3 Straight drawn part side A Length of transition zone b Straight drawn part side

U-bending is used to calculate the drawing force on the straight sides of the drawn parts. In combination with the friction forces on the blankholder and the length of the bending edge b, the drawing force can be calculated: 35

Eqn. 1
\require{color}\definecolor{myred}{RGB}{255,0,0} F_{\color{myred}Zg}=\mu_{\color{myred}N}\cdot F_{\color{myred}N}\cdot\left(1+e^{\color{myred}\mu_{\color{myred}Z}\cdot\frac\pi2}\right)+0,91\cdot R_{\color{myred}m}\cdot\frac{b\cdot s_{\color{myred}0}}{\frac{r_{\color{myred}M}+r_{\color{myred}St}}{s_{\color{myred}0}}+1}
Eqn. 2
\require{color}\definecolor{myred}{RGB}{255,0,0} \sigma_{\color{myred}Z}=\frac{F_{\color{myred}Zg}}{b\cdot s_{\color{myred}0}}
Drawing force on the straight sideFZg=22.57kN 
Tensile stressσZ=225.67MPa 
Coefficient of frictionμN = 0.1
BlankholderforceFN = 100kN
Friction drawringμZ = 0.1
Maximum Tensile StrengthRm max = 200MPa
Lengthb = 100mm
Sheet thicknesss0 = 1mm
Die radiusrM = 10mm
Punch radiusrSt = 10mm
0.10
Calc 1
Drawing force straight side 35
35
Strackerjahn, W. / Die Voraussage des Versagensfalls beim Tiefziehen rechteckiger Teile / Dissertation / Hannover / 1982 / …
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