what is mean Roll Forming Process?
Roll Forming Process is a type of rolling involving the continuous bending of a long strip of sheet metal (typically coiled steel) into the desired cross-section. Roll forming involves uncoiling a long strip of metal and sending it through several stacks of rollers set up in a long line. It is performed at room temperature, hence the moniker ‘cold’, which is often dropped. Roll forming at room temperature maintains or even improves the properties of the feedstock material. The strip passes through sets of rolls mounted on consecutive stands, each set performing only an incremental part of the bend until the desired cross-section (profile) is obtained. Roll forming is ideal for producing constant-profile parts with long lengths and in large quantities.
Cold Roll Forming Process :
Cold Roll Forming Process is a bending process where the bending occurs gradually in several forming steps from an undeformed strip to a finished profile in roll forming machine. The process is very interesting for the sheet metal industry due to the high speed in which the profile can be produced by a roll forming machine. High strength steel has, in recent years, become more common in cold roll forming. These materials have advantages but also disadvantages that affect the design of the process. The cold roll forming process is a highly efficient process used to produce profiles for many applications, for example, vehicles, buildings, domestic machines, etc. Therefore, it’s market share is increasing every year. Many of the above products are already today made of high strength steel and the usage of these materials will likely continue to increase.
Cold Roll Forming Process, as an energy-saving and material-saving metal cold forming process, is widely used in construction, automobile, railway, aerospace, and other ﬁelds. As a kind of common metal skeleton in construction, the forming quality of C-channel steel is particularly important. However, with the shape of forming products becoming more and more complex, the requirement for forming process is becoming higher and higher. In industrial production, technicians also generally design roll ﬂowers by the trial-and-error method, which causes a large number of human and ﬁnanciallosses, and also makes cold roll forming process is still generally considered as art, not science.
Cold roll forming is a process of metal slow deformation due to its special forming length. The front part of the sheet is always formed faster than that of the back part. In cold roll forming a profile is formed in several forming steps from an undeformed strip to a finished profile. The forming process is geometrically complicated due to the fact that. the forming does not only occur in the tools but also between each forming stand. When creating the tools the tool designer must decide how many forming steps the profile demands. The number of steps is dependent on the shape of the cross-section, tolerance, thickness and material properties. It is important to minimize the number of steps as this reduces the cost of the cold roll forming machine. Then the process can be a competitive alternative also for smaller production volumes. Therefore the knowledge of how high strength steel affects the number of forming steps is important.
Rolled Steel :
Cold Rolled Steel is steel which has been rolled at room temperature, below its recrystallization temperature. This increases its strength and hardness and decreases its ductility. In addition to the improvement of mechanical properties, cold rolling results in more control over the shape and dimensions of the finished product. Cold Rolled steel has an improved surface finish and tighter tolerances compared to hot rolled steel. It is commonly used for parts requiring cold forming, such as crimping, swaging or bending. It can also be used for Shafts, machinery parts, bolts, pinions, gears, as well as in the creation of furniture, appliances and other consumer goods. Cold Rolled Steel can be purchased online and at any Metal Supermarkets location. It can be cut to your exact specifications.
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