Producing a hole in hot metal by forcing a pointed tool through it. Frequently used in making steel tubes from solid steel bars.
Pounding a hole in a hot bar. This is usually done to make a "threaded" joint, into which another heated bar be will slipped. The opening is then quickly cooled to fuse the joint. (Also see threading.) TO TOP
Creating a hole in the metal with a punch.
The general term for cutting (shearing or punching) openings, such as holes and slots in sheet material, plate or parts. This is practically the same operation as blanking; The difference being that the slug or piece produced by piercing is scrap, whereas the blank produced by blanking is the useful part. In the two cases the burr is opposite.
The process of perforating metal so that the sawframe and blade pass through it to make a hole or opening.
forming or enlarging a hole via a tapered or cylindrical punch.
The practice of making a hole through parts of the body or skin to allow for the insertion of bone, shell, ivory, glass, metal or other material to wear as an ornament. For more information, click here.
Forming a hole in a sheet metal with a pointed punch with no metal slug fallout.
Punching of openings such as holes and slots in material.
The process, also known as the “Mannesmann Process” by which seamless tubes are made from solid billets. A heated billet is rapidly rotated and driven ahead by drive rolls, the action of which is to form an opening in its center. The forward movement imparted by the rolls carries the shell over a freely rotating mandrel which shapes the inner surface of the tube. Punching holes in sheet or strip, or walls of shells.