New technology to meet the needs of modern stamping production (6)

2. Multiple stamping die process

With the promotion of the overall side wall stamping technology of the mid-to-high-end sedan body and the increase of the press table, the stamping process has also developed rapidly. The stamping parts such as the door and the fender have been developed from the past one-piece single-piece to the double-slot mold production. The production efficiency has been doubled. The latest development has been developed to the inner and outer panels of the door using four-slot die, and the production efficiency has doubled.

When the output is large, the use of multiple pieces of simultaneous stamping can reduce the mold cost, material cost and processing cost. For the forming process, it is also beneficial to the material stress and strain symmetry uniformity, and also improves the production efficiency and reduces the energy. Consumption.

The latest development trend of two-piece production is the simultaneous production of inner and outer plates. The advantage is that the production quantity is matched, and the welding line can be simultaneously pressed at the same time, and the logistics is smooth and convenient.

3. Progressive mode

Progressive combination dies have been widely used in the automotive industry in developed countries, and have the advantages of high productivity, low mold cost, and no need for sheet shearing. Compared with stepped molds used on multi-station presses, progressive die can save 30% of the cost, but its application is limited by the depth of the stretch, the guiding and transporting of the material of the strip edge material, mainly used for stretching depth. A lighter, simple part.

Intelligent control technology

In recent years, the intelligent control technology for stamping production has developed rapidly. On the basis of the integration of materials and processes, it realizes online control or intelligent control (also called “adaptive control”) of the stamping process based on existing materials and process databases. First, an on-line detection system is established for the material or process parameters. When the material properties or process parameters change or fluctuate, the automatic detection system (sensor and signal conversion system) determines the instantaneous magnitude of the relevant parameters online, and through computer simulation analysis and Optimization software (such as artificial neural network methods, expert systems) determine the optimal combination of process parameters after parameter changes. After the automatic control system adjusts the process parameters, adaptive control of the stamping process can be achieved. The gradual accumulation of new production data can further serve as the basis for process optimization for subsequent processing.

Conclusion

Stamping technology and equipment with greater flexibility or flexibility will adapt to the development trend of small batch, multi-variety, mixed-flow production mode and market diversification and individualized demand, and strengthen the rapid response of enterprises to market changes.

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