Precision metal stamping mold processing parts and drawings design error: drawings marked clearly needs to work out the parts of guide area.
But as a result of pressure core of modalities face again after the casting forming is adopted to guide surface machining, the machining surface and guide die surface match after clearance error exists, in the mold material emerged during the normal operation of the pressure core left/right.
Precision metal stamping flanging forming mold design flaw, the mould for a double cavity left/right public, due to this process content in addition to the flanging, also have both shape forming content, combined with the special complex parts, curved surface is narrow, the forming requirements concave die core material consistent with the forming surface and so on, cause mould structure conditions for forming large travel, pressure area is small.
Designers in the original die design, only consider the small pressure is expected to face this feature, but neglected the material core forming guide slide stroke.
Design defects which were as follows: 1, the pressure of material core design oriented length is 125 mm, the actual length of 115 mm, although within the scope of the design, but more than hold up part of the 115 mm motion effectively guide 10 mm long, there is pressure material core lift is not stable, no the ills of product positioning.
2, forming a 115 mm high, need to design special guide board, not by the processing surface and die wall slip distribution gap direction, side friction increases, self lubricating effect is very poor, side force of the strong can not be eliminated, can cause caused by long-term wear after batch production guide clearance increases, loss of the mold in advance normal guide effect, which will produce a vicious quality accident.
A: stamping production quality requirements