Precision press die parts for punching copper-based materials used for connectors and lead frames etc. are mostly made of cemented carbide.
However, in high-speed press production, for example at speeds exceeding 1,000 spm, with cemented carbide die parts, copper adheres to the die, resulting in shortened die life and product defects. In addition, the frequency of die maintenance, such as regrinding, increases, resulting in lower productivity.
Our ZrO-based ceramic material "NPZ-28" (our material name) solves these problems.
However, in high-speed press production, for example at speeds exceeding 1,000 spm, with cemented carbide die parts, copper adheres to the die, resulting in shortened die life and product defects. In addition, the frequency of die maintenance, such as regrinding, increases, resulting in lower productivity.
Our ZrO-based ceramic material "NPZ-28" (our material name) solves these problems.
Advantages of introduction
In press punching of copper-based materials, NPZ-28 die parts's lifetime is 10 times longer than cemented carbide die parts.
‡@Reduced frequency of regrinding of die parts (2.5 times less than cemented carbide)
Since there is no metal binder phase in NPZ-28, adhesion with copper, which causes wear, can be reduced. As a result, the number of shots before regrinding becomes necessary can be increased by approximately 2.5 times compared to cemented carbide die parts (in the case of copper-based material punching). Also, since there is no adhesion between the die and the product workpiece, the defect rate of the manufactured products can be reduced.
