Скачать или смотреть Stretch Forming Process of Aluminum Alloy Automobile Roof Rack【Stretch Forming Machine】

The stretch forming process is a common method used to shape sheet metal components, including aluminum alloy parts like an automobile roof rack. In stretch forming, a flat sheet of metal is clamped along its edges and stretched over a die to create the desired shape.



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Design and Die Preparation: Develop a design for the roof rack, considering factors such as load capacity, aerodynamics, aesthetics, and functional requirements. Based on the design, create a die, which is a tool used to shape the metal sheet. The die will have the inverse shape of the final roof rack component.




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Clamping: Secure the edges of the aluminum automobile roof rack in a clamping system. The clamps hold the sheet in place during the forming process and prevent it from moving excessively.


Stretching: Apply controlled force to the automobile roof rack using a hydraulic or mechanical press. The force is applied gradually, stretching the metal sheet over the die's contour. The stretching process allows the metal to flow and take the shape of the die.


Forming: As the sheet is stretched, it conforms to the shape of the die, gradually forming the desired roof rack component. The stretching and forming process should be carefully controlled to ensure uniform deformation and avoid defects like wrinkling or tearing.


Trim and Finish: After the stretching and forming process, the excess material is trimmed off to achieve the final shape of the roof rack. Additional finishing processes, such as deburring, polishing, or surface treatment, may be applied to enhance the appearance and functionality of the component.


Inspection and Quality Control: Thoroughly inspect the formed roof rack for any defects or imperfections. Check for dimensional accuracy, surface finish, and structural integrity. Non-destructive testing methods, such as visual inspection or ultrasonic testing, may be employed to ensure the quality of the component.


It's important to note that the stretch forming process can be complex and requires skilled operators and precise control of the forming parameters. Different alloys and component designs may have unique considerations, so consulting with experts in metal forming and following specific guidelines for the chosen aluminum alloy is recommended.