How to determine the depth of the plate grooving

The grooving process is to make the material easy to bend forming and bending Angle R can be minimized, and then use bending machine or manual bending mold, in this way to complete processing and meet the appearance requirements of the product. So what should we pay attention to when grooving?

Figure 1  Grooving effect

1. V-shaped grooves are usually processed when customers have special requirements on the bending of sheet metal parts, and normal bending cannot reach the required minimum value. In this case, use the planing groove after bending.

2. The structure and size of sheet metal parts are special. When normal bending cannot be achieved, grooves need to be planed. For example, U-shaped structural parts, the inner cavity size is only a few millimeters.

3. The depth, width and Angle of V-shaped grooves are different

The depth of the V-shaped groove is different for different thickness materials. Specific processing data need to be customized due to customer requirements for products.

Note: According to experience, the Angle of V-shaped groove should be 2 degrees larger than the actual forming Angle. The material will rebound when bending and forming, and 2 degrees of clearance should be reserved to control the Angle during machining.

4. V-Grooving for plates that cannot be directly bent, grooves should be made before bending. But grooves the plate, and then fold the edge, is bound to cause great damage to the strength and stiffness of the plate, therefore, only in the case of not grooving the plate, and the depth of grooving can not exceed the thickness of the plate half. Of course, after the grooving, the curved outer rounded Angle is smaller, generally R is about 1.5 ~ 2mm (depending on the depth of the grooving), and the plate without grooving, the curved outer rounded Angle R is generally 4 ~ 4.5mm (the thickness of the workpiece is 3mm).

Table 1 shows the statistics of the corresponding grooving depth of several common thickness plates

Table 1: Reference for grooving depth

It can be seen that there is a certain relationship between the plate thickness and the depth of the groove, and the ratio is about 1:0.5 ~0.6. What depth is actually appropriate needs to be judged according to your own use.