Concave die base plate for drop hammer die and application method
A technology of concave die backing plate and drop hammer die, which is used in metal processing equipment, forming tools, manufacturing tools, etc., can solve the problems of parts cracking, difficult material feeding, low qualification rate, etc., and achieves the reduction of tensile stress, Simple structure and high pass rate
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[0024] Example 1: see figure 1 with figure 2 , A concave die backing plate 2 for a drop hammer die, which is set between the male die 1 and the female die 3, and is used to process deep fairing parts. The female die 3 is provided with a recess for the male die 1 to embed The radius r of the rounded corners of the upper edge of the recess includes a plate body, the plate body matches and fits the upper surface of the concave mold 3, and the plate body is provided with an opening corresponding to the recess of the concave mold 3, and the shape of the opening is The upper edge of the recess is straight, and the size of the opening is 1mm-2mm larger than the size of the upper edge of the die 3, the upper edge of the opening has a rounded corner radius R, and the rounded corner radius R> r, one side of the board is provided with a limit block 4 for positioning it on the concave mold 3.
[0025] In this embodiment, there are two limit blocks 4, which are symmetrically distributed on o...
Example Embodiment
[0038] Example 2:
[0039] Assuming that the thickness t of the sheet is 0.8mm, the radius of the round corner in the die backing plate 2 is R=12t=9.6mm, at this time the value of the round corner radius of the flange root of the fairing part is 6.5m, so we choose r to be 6.5m , After calculation, r=(0.6-0.8)R, only one die backing plate 2 is selected;
Example Embodiment
[0040] Example 3:
[0041] If r=5mm at this time, then r <(0.6-0.8)R, select multiple die pad 2 transitions, according to the public
[0042] Formula R N =(0.6-0.8)R N-1
[0043] r=(0.6-0.8)R N ;
[0044] It can be seen that at least two die backing plates 2 need to be selected, R1 and R2 respectively,
[0045] R1=12t=9.6mm;
[0046] R2=(0.6-0.8)*R1=(5.76-7.86);
[0047] r=(0.6-0.8)*R2=5mm.
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