What are the stamping process principles behind the metal deformation art of aluminum stamping parts (Communities - Activities)
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What are the stamping process principles behind the metal deformation art of aluminum stamping parts | |
The stamping process principles behind the metal deformation art of aluminum stamping parts mainly involve the plastic deformation of materials, mold design and processing technology control. 1. Principle of plastic deformation The metal deformation art of aluminum stamping parts relies on the plastic deformation characteristics of metal materials. Plastic deformation refers to the property of a material to undergo permanent deformation under the action of an external force, and the ability to maintain its shape after the external force is removed. Stress and strain: During the stamping process, the material is subjected to external stress (pressure), which causes the lattice structure inside the material to slip and dislocate, thereby producing plastic deformation. The relationship between stress and strain can be described by the stress-strain curve of the material. Deformation mechanism: The deformation mechanism includes slip, twinning and intergranular fracture. Slip is the most important plastic deformation mechanism, which is achieved by relative sliding of the lattice plane. Twinning occurs under high stress conditions, and the lattice symmetry changes to form twins. Intergranular fracture refers to crack propagation caused by dislocation movement at the grain boundary. 2. Mold design Mold design is the core of the stamping process and directly affects the shape and quality of the final product. The mold usually includes a concave mold and a convex mold. The concave mold forms the internal shape of the product, and the convex mold forms the external shape of the product. Shape design: The shape design of the mold needs to accurately match the geometric shape of the final product. The design of complex artistic shapes requires high-precision CAD/CAM technical support to ensure the accuracy and surface quality of the mold. Material selection: The selection of mold materials directly affects the life of the mold and the quality of the stamped parts. Commonly used mold materials include tool steel, cemented carbide, etc., which have high hardness, wear resistance and impact resistance. Mold structure: The mold structure includes a guide device, an ejector device and a cooling system. The guide device ensures the precise alignment of the punch and the die; the ejector device helps the product to be smoothly ejected from the mold; the cooling system controls the mold temperature to prevent overheating from affecting the material properties. 3. Process control Process control is the key to ensuring the quality of stamped parts, including the control of parameters such as stamping force, stamping speed, lubrication and cooling. Stamping force: The size of the stamping force directly affects the degree of plastic deformation of the material. Excessive punching force may cause material rupture or mold damage, while too little punching force may cause insufficient material deformation. The selection of punching force needs to be accurately calculated based on the performance of the material and the shape of the product. Punching speed: Punching speed affects the fluidity and deformation efficiency of the material. High-speed punching can improve production efficiency, but may lead to a decrease in material surface quality. Low-speed punching is conducive to improving surface quality and shape accuracy, but production efficiency is low. Lubrication: The use of lubricants reduces the friction between the material and the mold, reduces mold wear and material adhesion, and improves the surface quality of stamped parts. The selection of lubricants needs to be optimized according to the type of material and the working environment. Cooling: Cooling control of molds and materials is an important means to prevent material overheating and mold wear. The cooling system cools the mold by circulating cooling media (such as water and oil) to keep the temperature of the mold and material within a suitable range. | |
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2024-11-23 (0.393 sec)