Cold-extrusion forming process of high-temperature alloy high-strength skirt type self-locking hexagonal nut

• Main Authors: XIN XUANRONG, HE CHENGSONG, SHI SONGHUA, SHI ZHIXIN, LIU XINCHENG
• Format: Patent
• Language: Chinese; English
• Published: 21.08.2013
• 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 invention discloses a cold-extrusion forming process of a high-temperature alloy high-strength skirt type self-locking hexagonal nut. The cold-extrusion forming process comprises the following steps of: firstly selecting a high-temperature alloy rod with a suitable casting diameter to do solid melting treatment; and then, carrying out extrusion on the rod section in a cold-extrusion forming mould to form an internal blind hole cavity of the nut, form a skirt bottom end cavity of the nut, form an outer hexagon of the nut and form a short cylinder straight footstep of the nut to be connected with a skirt of a cone of 45 degrees. After the high-temperature alloy high-strength skirt type self-locking hexagonal nut disclosed by the invention is extruded up and down, metal fibers are continuously distributed from the skirt to the hexagon; and the metal fibers in a hole can be vertically combed under the extrusion of strong extrusion force, so that the toughness of a product is improved.