In the production of seamless steel tubes today, the perforation process is widely used and very economical. In the production of seamless steel tubes, the perforation process is more reasonable, and the perforation process is automated. Common perforators include cone-roll perforators and drum-roll perforators.

The role of perforation technology in modern steel pipe production?

In the production of seamless steel tubes, the function of the perforation process is to perforate the solid tube blank into a hollow capillary tube. The entire production process generally includes perforation, tube rolling, and sizing and reducing processes. Perforation is the first process of metal deformation. The pierced tube is thicker, shorter in length, and has poorer inner and outer surfaces, so it is called a capillary. If there are some defects in the capillary, it is difficult to eliminate or alleviate them after the subsequent process. Therefore, the perforation process plays an important role in the production of seamless steel tubes.

How many punching methods are there for seamless steel tube blanks?

The perforation methods of seamless steel tube blanks include pressure perforation, push perforation, and oblique perforation.

(1) Pressure perforation

Pressure piercing is piercing on a press. The raw materials used in this piercing method are billets and polygonal ingots. The working principle is to first put the heated billet or ingot into the round die, and then the press uses the punch to drive the punch to punch out a circle of holes from the center of the tube billet. The deformation of this perforation method is very small. Generally, the metal punched out in the center just fills the gap between the blank and the round die, so as to obtain a circular capillary with almost no extension, and the maximum extension coefficient does not exceed 1.1.

(2) Push a hole

Push piercing is piercing on a push piercing machine, which is an improvement on pressure piercing. Change the stationary cone to a pair of rollers with round holes. A pair of rollers are driven by the motor to rotate in the opposite direction (the rotation directions of the two rollers are opposite). In order to facilitate rolling, a reverse thrust (hydraulic cylinder) is added to the end of the billet, so it is called push piercing.

(3) Cross rolling piercing

This perforation method is widely used in the production of seamless steel tubes. Generally, a round tube blank is used to plastically deform the metal to form an inner hole, so there is no metal loss. For two rolls with guide plates, the perforation process can also be improved to prevent defects, thereby reducing the quality requirements for seamless steel tube blanks.

The above is the pickling process of seamless steel tubes, I hope it will be helpful to everyone. Tianyang Steel Tube, a seamless steel tube manufacturer from China, provides seamless steel tubes with high quality, welcome to consult and purchase.