2results about How to "Guaranteed arc" patented technology

This utility model provides an extrusion forming mechanism for a side wall boss on an electric vehicle frame tube fitting, including a base. A fixing block is fixedly installed at the top of the base. A convex groove is formed on the top of the fixing block. An insert is embedded on one side of the convex groove, and a fixing cylinder is fixedly installed on the other side of the convex groove. An inclined top block is fixedly installed at the bottom of the inside of the fixing cylinder, and an extrusion steel ball is placed at the top of the inclined top block. An extrusion assembly is provided at the top of the inside of the fixing cylinder. When extruding a side wall boss on an electric vehicle frame tube fitting, this extrusion forming mechanism pushes the extrusion steel ball into the inside of the frame tube fitting plug through the extrusion assembly. The extrusion of the steel ball forms a boss on the side wall of the electric vehicle frame tube fitting, ensuring not only the curvature of the boss but also the uniform force on the side wall of the electric vehicle frame tube fitting during the extrusion process, thus ensuring the curvature and quality of the formed boss.

This invention belongs to the field of aerospace structural component manufacturing technology, specifically relating to an arc-shaped cap and its integrated bending forming method and application. The integrated bending forming method includes the following steps: S1, blanking to obtain a cap plate blank or cap frame blank; S2, milling to machine the external dimensions and hole positions before bending, obtaining a flat, non-arc semi-finished product; S3, bending, placing the flat semi-finished product between the punch and die of a bending die, and applying pressure to press it into an arc-shaped part with a predetermined curvature; S4, stress-relieving treatment of the bent arc-shaped part to eliminate its internal residual stress; S5, shaping, bending and shaping again to stabilize its curvature shape, obtaining the final arc-shaped cap product. This invention effectively solves the problem of springback during sheet metal bending by introducing a combination of bending die design, graded pressure control, and stress-relieving and shaping processes, ensuring the accuracy of the final product's curvature and external dimensions.