Drawing die for second-order deformation of square rod into round rod

• Main Authors: DONG XIAOWEN, LIU JIE, JIANG JIE, LAN ZHANJUN, LIAN YANGZI, WANG HOUXIN, HE YUNYUN
• Format: Patent
• Language: Chinese; English
• Published: 26.03.2024
• Subjects: AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL; MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING

The drawing die comprises a die core, a die cavity penetrating through the die core is formed in the die core, the die cavity is sequentially provided with a lubricating area, a polygonal area, a circular area and an outlet area from top to bottom, the included angle between the lubricating area and the axis of the die cavity is beta, the polygonal area is larger than the circular area, and the outlet area is larger than the polygonal area. The included angle between the polygonal area and the axis of the die cavity is alpha 1, the included angle between the circular area and the axis of the die cavity is alpha 2, alpha 1 is smaller than beta, alpha 1 is smaller than or equal to alpha 2, the lubricating area is in a cone shape with the inner diameter sequentially reduced from top to bottom, and the included angle beta ranges from 45 degrees to 80 degrees. By using the drawing die, a square rod is drawn into a round rod at a time, repeated transition drawing is not needed, and the production efficiency is impr