Drywall Screw Moulds
Forming Processing of Thread Part
In the thread forming process of bolts, a rolling machine called "rolling or rolling" is used to cold forge the thread. The forming method is the same as that of the bolt head.
Thread shape processing is to place the blank between two sets of forging dies for clamping, while turning one of the two forging dies, while making the blank rotate, through plastic processing into thread shape. The forging die used for thread forming is called "rolling forming die".
There are three kinds of rolling forming machines: flat forging die rolling forming machine, round forging die rolling forming machine and planetary rolling forming machine. The flat forging die rolling forming machine is equipped with two common roll forming forging dies. One side is fixed and the other side is moved back and forth to roll the blank. Round forging die rolling forming machine rotates two parallel cylinder rolling forging dies in the same direction, and rolls the blanks clamped between the two forging dies. The processing method of planetary rolling forming machine is to clamp the blank between the cylindrical forging die and the sector forging die, and roll the blank through the rotary cylindrical forging die.