How Do Wire Manufacturers Choose Wire Drawing Dies

The following is a systematic guide for wire manufacturers to choose wire drawing die, integrating technical parameters, cost efficiency and industry practice: 

1.Die material selection criteria

Wire type and diameter Recommended die material ‌ Core basis

φ> 0.10mm Hard material ‌ (brass wire, copper-clad steel) Polycrystalline diamond die (PCD) Micro-holes oil storage to form a lubricating film Better wear resistance than natural diamond

φ≤0.10mm Soft material ‌ (gold/silver fine wire, high surface requirement wire) Natural diamond die Mirror surface ensures smoothness and avoids soft wire scratches

Stainless steel/alloy steel wire ‌ (φ0.1-2.0mm) PCD or CVD coated die Wear resistance life is extended by 3 times Strong impact resistance

High temperature/corrosive environment wire Ceramic die heat resistance > 1000℃ and chemical corrosion resistance 

2.Groove parameters design specification ‌ 

1)compression Angle (cone):‌ 

soft metal (copper/aluminum)‌ : 16 °- 18 °

hard metal (stainless steel)‌ : 12 ° - 14 °

2)Structure of the entrance area : 60°-90° bell mouth

3.Precision points ‌

Aperture tolerance :

φ > 1mm: ±0.01mm

φ0.1-1mm: ±0.002mm

φ < 0.1mm: ±0.0005mm