Stamping:

Stamping is very similar to punching, except the material is not cut. The die is shaped to make a raised portion of material rather than penetrating.

Cutting: 

There are many ways to cut nowadays. The old standby is the saw. Others now include plasma torches, water jets, and lasers. There is a wide range of complexity and price, with some machines costing in the millions.

Folding/Bending: Some parts need to be bent. The most common method is a press brake (or brake press). It has a set of dies that pinches the metal to form a crease.

This operation can only be performed in very specific cases due to the movement of the part and the possible shape of the dies. Designing for Lean manufacturing, though, can help prevent complex shapes that slow down production. Sometimes using two different types of fabrication processes or two different pieces fastened together work better than one complicated piece.

Punching:

Punching is the act of a punch and a die forming a ‘scissor’ effect on a piece of metal to make a hole in it. Obviously, the punch and die must be the same shape and size of the desired hole. In some cases, the main piece of material is kept, as in when holes are added for fasteners. In other cases, the piece that is removed is the desired product-this is called ‘blanking’.

Welding:

Welding means a metal joint formed by softening with heat and fusing or hammering together. Here in China, most of the welding job is done by human, no machine can finish this job, In metal industry, welding is judged as one special process, as this is still no way to check and inspect the quality of welding.

Machining: 

This is the process of removing metal from a piece of material. It might be done on a lathe, where the material rotates against a cutting tool, or in some other cutting machine where a rotating tool is moved in a variety of ways against a stationary piece. Drills fall into this latter category. The range of motion of the cutting head is defined by the number of axes (i.e. a 3-axis machine).

Finish:

Anodizing, electroplating, powder coating, silkscreen,Laser Logo and so on...