One, stamping die parts analysis of Dongguan stamping factory
In recent years, Switzerland and Japan have carried out in-depth research and development on electromechanical processing equipment, and the process has been further improved, such as NC and CNC line cutting machine with higher precision, precision up to ±0.005 ~ 0.001mm, or even higher. The surface roughness Ra value can be controlled to 0.4 μm. Cheng Ruifeng's metal stamping mold cutting size precision to +/-0.01, bending size within +/-0.08mm.
High precision, high life punching die can be manufactured by precision grinding method, such as: small gap composite punching die, multi-station continuous composite die, etc., with high dimensional accuracy, working parts processing surface roughness Ra value is small, high life of the die. Cheng Ruifeng machining mold parts mainly using edM wire cutting or electric punching machine rough machining. Precision grinding, by forming grinding, optical curve grinding, CNC machining and other methods combined, the machining accuracy can reach ±0.001 ~ 0.0005mm, the surface roughness Ra value can reach 0.1 ~ 0.025μ m. Therefore, the mold manufactured by this process, whether it is dimensional accuracy, or the surface roughness of working parts, can meet the requirements of single die and composite die, than the mechanical and electrical processing technology manufacturing die a higher grade.
Two, dongguan stamping plant stamping processing technology analysis
1) Precision stamping by three forces (blanking force, blank holder force, anti-jacking force) together. The gap between convex and concave die is only 0.5% of the material thickness, which is 1/10 of the common stamping gap.
2) Precision stamping processing has the advantages of smooth blanking surface, high dimensional accuracy and high flatness. Through deburring treatment can be directly assembly, without the common stamping required after cutting, cutting, grinding, leveling equal process, saving the investment of auxiliary equipment and manpower, material resources, operating costs, so as to improve production efficiency, avoid the accuracy loss of each process, to ensure the reliability of mass production.
3) The main application field of precision stamping is automotive parts. The modern car industry enjoys all the performance advantages of fine stamping parts. There are at least 40 kinds of fine stamping parts in every car. Automotive wiring harness and terminal, the material is usually C2680, spacing 6.5mm, dimensional tolerance: ±0.02mm, straightness: + / -0.05mm, verticality: + / -0.05mm, stamping speed: 500SPm /min.