Sheet metal fabrication is an essential aspect of mechanical processing, especially in industries such as aviation, household appliances, automobiles, elevators and others. Sheet metal parts are widely used in these industries.
Bending is one of the most important processes in sheet metal manufacturing and is considered a unique forming process.
The quality of the bending process significantly affects the size and appearance of the final product.
Therefore, ensuring the dimensions and forming angles of the part during the bending process is a crucial area of research in bending technology.
As the economy develops and people's living standards improve, their sensory activities become higher.
The more intricate the shape of the sheet metal decorations, the more it reflects the designer's skill level and modern style, thus attracting the attention of most customers.
In addition, the workpiece must meet technical requirements such as having a minimum circular arc radius at the bending edge, no bend marks on the surface, and no indentations on the decorative surface.
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The traditional bending machine did not meet specific technical requirements, leading to the emergence of sheet metal bending and grooving technology.
This article focuses on the characteristics of the grooving technique, methods for machining grooves in sheet metal, and ways to ensure accuracy in size and angle during the bending process.
Traditional Bending Methods and Their Limitations
Fig.1 Fold formation process
The traditional bending method in sheet metal manufacturing involves using pressure from the upper and lower dies of a bending machine.
The sheet metal is bent through the opening of the lower die and the upper edge of the upper die.
The metal plate undergoes a transformation from elastic deformation to plastic deformation.
The bending angle is determined by the depth of the upper die into the lower die, and the bending radius (R) must be greater than or equal to the plate thickness
