During long-term use of the wire drawing die, the die wall is strongly rubbed and washed by the metal wire, which inevitably causes wear. The most common is the occurrence of annular gullies (dents) at the entrance of the wire at the working area. The appearance of the drawing die ring groove exacerbates the wear of the die hole, because the small core material 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 sizing area by the metal wire, plays the role of the abrasive, and enters The 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 mold is completely broken and scrapped.
It is very economical to develop a set of standard standards, strengthen daily maintenance, and often overhaul molds. Once the mold has experienced any slight wear and polishing in time, the time it takes to return the mold to its original polished state is short, and the die size of the mold does not change significantly.
In summary, it is necessary to maintain the size fluctuation of the drawing die during the drawing process, in addition to selecting the appropriate mold 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, A reasonable pass compression ratio must be determined to improve the conditions of use of the wire drawing die. Pay attention to the daily maintenance of the mold during use, and wash it frequently, and ensure good lubrication during the stretching process.