Metal fabrication is the creation of metal structures by cutting, bending and assembling     processes. It is a value-added process involving the creation of machines, parts, and structures from  various raw materials. The popularly applied material in metal fabrication are SPCC, SECC, SGCC, SUS301 and SUS304. And the fabrication production methods include shearing, cutting, punching, stamping, bending, welding and surface treatment, etc. Metal fabrication projects include everything from hand railings to heavy equipment and machinery. Specific subsectors include cutlery and hand tools; architectural and structural metals; hardware manufacturing; spring and wire manufacturing; screw, nut, and bolt manufacturing; and forging and stamping. The main features of the fabricated products are light weight, higher strength, inductive, low cost and stable quality. And the fabrication is popularly applied in the industries such as electronics and electric, telecommunication, automotive, medical appliance, to name a few. The main benefit of metal fabrication shops is the centralization of these many processes that are often required to be performed in parallel via a collection of vendors. A one-stop metal fabrication shop helps contractors limit their need to work with multiple vendors to complete complicated projects. With more and more fabrication is applied in industries, the designing of the fabrication is becoming a critical procedure during the developing of a fabricated product. Mechanical engineers must have the proper skill to design a the product to meet the demand in terms of function and appearance and low cost for mold.