Minimum Bending Radius of Sheet Metal Materials

When performing the bending of sheet metal materials, it is essential to fully consider the compression strength of the inner layer and the degree of tension generated in the outer layer. 

Different bending forces and deformation angles of the material itself will result in variations in the compression and tension strengths, while maintaining the original thickness of the sheet metal material. 

When the tensile force reaches its ultimate limit, the sheet metal material will inevitably fracture or break. 

Therefore, during the bending process of parts, it is crucial to accurately determine the minimum bending radius of the sheet metal material in advance to avoid operational errors and unnecessary production processing losses caused by exceeding the bending tolerance of the sheet metal material. 

Typically, sheet metal parts use materials with large bending radii. If there are no specific requirements for the radius in actual operations, the bending radius should be uniformly less than the thickness of the sheet metal material.

Distance between Hole Edge and Sheet Metal Bending Part

When bending sheet metal, there should be a certain distance maintained between the pre-drilled holes and the bending area to prevent significant deformation of the sheet metal part due to stretching of the hole positions during bending, rendering the sheet metal part unusable. 

Therefore, in the design and processing of sheet metal materials, it is necessary to ensure that the distance between the hole edge and the outer edge after bending is greater than or equal to three times the thickness of the sheet metal.

If it is difficult to achieve this control distance, another method is to pre-drill small holes before bending, and then enlarge the holes after bending to indirectly achieve the same operational objective.

Height of Straight Edge of Sheet Metal Bending Part

After completing the bending operation of the specified angle for sheet metal parts, the determination of the height of the straight edge needs to be further judged based on the size of the bending angle.

For sheet metal components that approach verticality after bending, with an angle of 90°, the most suitable height of the straight edge is generally twice the material thickness horizontally. 

This is because from a design perspective, when the height of the straight edge is less than twice the thickness, it is necessary to undergo the bending operation before subsequent processing to meet the predetermined product size requirements. 

On the other hand, for some sheet metal parts with oblique edges, the operation often directly proceeds to bending without considering the right-angle edge during the processing. 

After bending, the sheet metal part is cut to transform from a straight edge to an oblique edge to meet the processing requirements.

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