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Name：Rebecca Dong
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The effect of mould processing and manufacturing quality on die life. |
The quality of mold processing and manufacturing has a significant impact on the wear resistance, fracture resistance and adhesion ability of the mould. Therefore, in order to ensure the service life of the die, the following aspects must be considered.
1. Influence of machining accuracy of mold parts.
Work geometry of the mould parts, such as radius, draft Angle, Angle of the blade processing shall be carried out strictly in accordance with the design requirements, the cutting tool or equipment cannot achieve, measured by manual grinding and strictly, to ensure that the mold and reasonable stress state, with the size of the area, should guarantee the tolerance or grinding.
2. Influence of surface roughness of mold cavity.
Low surface roughness value, on the one hand may reduce the flow resistance of billet, and reduce the wear rate of cavity, on the other hand can reduce the surface defects, such as tool and machining welding spot, etc.) and the tendency of crack. The surface roughness has a great impact on the life of the die. For example, the surface roughness is R11. 6 1.85m, and its life span is about 30 thousand pieces. If the surface roughness of polished surface reaches R,O.2, 0.15m, the life span can be increased to 45,000 pieces.
3. Influence of mold hardness uniformity.
Mold in the process of heat treatment should ensure uniform heating, cooling, and should prevent mold surface oxidation and decarburization, should be timely after quenching and tempering fully, in order to improve the uniformity of the mold hardness, so as to obtain good abrasion resistance and high fatigue resistance and high fatigue life of hot and cold.
4. Influence of mold assembly accuracy.
Adjust the die clearance and uniformity, increase with the bearing surface and the clamping surface contact, to ensure the consistency of the punch and die stress center, these measures can improve the assembly precision of the mould, so as to improve the service life of mould.
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