There are many ways to cut. The methods described in this manual are generally accepted as the primary methods used to cut steel tubing.
Piercing a tube is the fastest conventional method to perforate (put a hole in) a tube. There are four different types of perforations: Single Dimple, Double Dimple, Clean hole one end and Clean hole two walls. Different shapes and sizes of perforations can be punched into a tube depending on the design of the perforator. Some examples are elongated holes, square, diamond, rectangular, and star-shaped. Punching units can be used in an arbor press, punch press, press brake, air or hydraulic press, or in a self-contained system.
The terms end-forming and end-finishing can mean many different things, depending on the point of view of the interpreter. It is safe to assume that these terms are often overlapping and easily misinterpreted. In this guide, we will consider swaging, expanding, flaring, doming (closing), and beading (external or internal) as end forming operations. All other operations will be considered end finishing.