MANUFACTURING METHOD OF WING NUTS
A manufacturing method of wing nuts has a round metal wire cut into segments used as billets. The method includes a basic formation directly forging the billet to become a primary body consisting of an intermediate head and two curved wings connected with two ends of the intermediate head respectively, a wing trigging employed for forging the wings of the intermediate head to become butterfly wings with a curved edge and an edge formation effected by forging the intermediate head to form a positioning groove in the center of the top and the bottom side respectively. Then the semi-finished product is finished by drilling and threading. By this method, manufacturing processes can be shortened to obtain a rapid producing rate and lessen waste volume, lowering cost and advancing competition.
1 . A manufacturing method of wing nuts, said method comprising:
a basic formation utilizing a billet cut from a round metal wire to create a primary body by being directly forged by a basic wing nut mold, said primary body consisting of an intermediate head and two curved wings connected with two ends of said intermediate head respectively;
a wing trigging employed for forging two said wings of said primary body to become butterfly wings with a curved edge by means of a curve-trigging mold;
an edge formation effected by forging said intermediate head of said primary body to form a positioning groove in a center of a top and a bottom side of said intermediate head respectively; and
a drilling done in a center of said positioning groove of said intermediate head to create a through hole that is further threaded.
2 . The manufacturing method of wing nuts as claimed in claim 1 , wherein a step of a primary wing trigging is added between the steps of said basic formation and said wing trigging and utilizes a wing micro trigging module to forge said wings of said primary body to achieve a primary micro trigging.