Fine Molybdenum Wire Polycrystalline Drawing Die

The drawing die in the processing of molybdenum wire is composed of two parts: the core and the die sleeve. The function of the die sleeve is to form a fixed core. The overall die is easy to use, and the mold is prevented from being excessively crushed during drawing to cause cracking. The impact resistance is improved, the expansion force of the core is reduced or offset, and the strength of the core is improved, and the heat generated by the deformation of the wire acts as a heat transfer and heat dissipation through the mold sleeve. In general, the mold of the wire drawing die The shape of the hole structure is shown in Figure 1. It consists of 5 parts: inlet zone, lubrication zone, working zone, sizing zone and outlet zone. Reasonable hole type can be seen by comparing the hole design and use of fine molybdenum wire polycrystalline wire drawing die. The importance of the parameters to the actual drawing process. For each drawing die with a fine molybdenum wire drawn from 0.30 mm to 0.18 mm, the reasonable parameters are the compression angle of 8. 12. The length of the effective sizing zone is 40% to 80%. , the ellipticity does not exceed 0.4%. And for multi-mode wire drawing, under normal conditions, the drawing die wear of the latter pass is larger than that of the previous pass, and the last few wire drawing die are prone to overshoot. Therefore, in practice Regular production Charles, abnormal timely replacement, to ensure the rational use of the entire drawing dies.