During long-term use of the wire drawing die, the PCD die wall is strongly rubbed and washed by the metal wire, which inevitably causes wear. In order to extend the 

service life of the wire drawing die, in addition to selecting the appropriate die material, designing a reasonable hole size, improving the manufacturing level of the wire 

drawing die, and achieving the surface finish of the die hole to meet the process requirements, it is also necessary to pay attention to the daily maintenance of the mold

during use, and wash it frequently, and ensure good lubrication during the drawing process.

The most common is the occurrence of circular groove (dents) at the entrance of the wire at the working area. The appearance of the drawing die ring groove aggravates

the wear of the die hole, because the small particle of the core material which is peeled off due to looseness on the ring groove is brought into the die hole working area 

and the bearing area by the metal wire, plays the role of the abrasive, and the entered wire of the die hole aggravates the wear of the die hole like a grinding pin. If it is not 

replaced in time for repair, the ring groove will continue to accelerate and expand, making the repair more difficult, and it is even possible to crack at the deeper part of the

annular groove, so that the die is completely broken and scrapped.