Point 1: Hardness of the Aluminum Flat Bars: Aluminum flat bars with high hardness are prone to cracking. It is crucial to select aluminum flat bars with high cost-effectiveness, focusing on the aluminum alloy and its state. The hardness of alloys from series 6 and 7 is higher than that of series 1, 3, and 5. It’s preferable to anneal them to the O state before bending. Quality of the aluminum flat bars also matters.
Point 2: Thickness of the Aluminum Flat Bars: Overly thick aluminum flat bars are not conducive to bending. Thinner aluminum flat bars are preferred whenever possible.
Point 3: Spacing of the Bending Radius (R): A larger bending radius (R) increases the pass rate, so it’s advisable to adjust the bending radius to be larger whenever possible.
Point 4: Alignment of the Aluminum Flat Bars’ Grain Direction: The bending direction should be perpendicular to the grain direction of the aluminum flat bars, not parallel. For aluminum flat bar components with metal drawing requirements, it is preferable to perform the drawing after bending, if feasible in the manufacturing process, to reduce the risk of cracking during bending.
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