7 Factors to Consider in Drawing Die Design

1) The choice of drawing die structure: According to the product shape and batch, the number of deep drawing is to use blanking compound drawing or continuous drawing. When designing blanking compound drawing dies, blanking die height should be 2~5mm higher than drawing punches to facilitate punching and drawing processes.

2) The depth of the workpiece depth and the number of drawing times are determined.

3) Selection of blank holders and use of limit posts.

4) Drawing process calculation: Table 3-16 shows the calculation formula for simple geometry surface area.

Table 3-16 Simple Formula Surface Area Calculation Formula No. Name Area A No. Name Area A1 Circle A=d2/47 Cone A=πdl/22 Ring A=π/4(d2-d12) 8 Taper Table A=πl[(do+d) )/2]3 Cylindrical A = πdH9 Spherical absence A = 2πrh4 Hemispherical A = 2πR210 Convex spherical ring A = π (dl + 2rh) 51/4 Ball ring A = (π/2) R (πd + 4r) 11 Concave sphere A = π (dl-2rh) 61/4 Concave sphere A=(π/2)R(πd-4r) 125) Design of the working part of the drawing die, select an appropriate gap value.

6) Determine the unloading, top piece method and structure 7) Draw the assembly drawing and parts drawing Note: In order to facilitate product removal, the stroke of the press must be greater than 2 times the height of the drawing piece, and a vent hole must be opened on the punch.