Cutting is the separation of a physical object, into two or more portions, through the application of an acutely directed force. For metals there are many cutting methods which can be grouped by the physical phenomenon used. Below is a list of some of the cutting techniques utilised at Stratford Metal Fabrications:
- Chip forming – sawing, drilling
- Shearing – punching, stamping
- Abrading – grinding
- Heat – flame cutting, plasma cutting, laser cutting
- Eelectrical discharge machining (EDM)
Technical bit: Cutting has been at the core of manufacturing throughout history. Cutting is a compressive and shearing phenomenon, and occurs only when the total stress generated by the cutting implement exceeds the ultimate strength of the material of the object being cut. The simplest applicable equation is stress = force/area: The stress generated by a cutting implement is directly proportional to the force with which it is applied, and inversely proportional to the area of contact. Hence, the smaller the area (i.e. the sharper the cutting implement), the less force is needed to cut something. It is generally seen that cutting edges are thinner for cutting soft materials and thicker for harder materials.