Coiled Steel Straighteners
The next auxiliary machine involved with a punch press set up, isn’t always necessary. Material straighteners are used in a hand full of situations, however, aren’t always necessary and their usage depends heavily on the condition of the material and amount of stations within a die.
Coiled material will always have a slight curvature to it, due to its tightly wound and banded state. To neutralize the curvature in coiled steel, straighteners have to really make a mark on the material. In the picture above, there are 9 straightening rollers. The pressure from each roller bends the material in different directions to eventually even out the material. As the material enters from the right, the first rollers apply the most force, and as the material moves to the left and towards the press, the rollers weaken in force applied allowing for the deformations to gradually even out, making the material straight.
The other common situation where a material straightener is required is when the material is being ran through a progressive die of more than three stations. Running material through multiple stations means that there are multiple forms, hole piercing, or cutting that needs to be done to create the desired part. Because of the multiple operations that need to be done, ensuring that the raw material that is being fed into the press is as straight, and flat as possible is paramount. Having the material be consistently straight helps ensure that the die will run as it is designed, and eliminate any backing up of material or malfunctions that could be detrimental to the die and stamping press.
Next week, we’ll take a look at feeders, the ever important auxiliary equipment that keeps the material churning into the stamping press.