What is the development trend of modern automobile stamping parts forming technology?
(1) Modular stamping technology
The outstanding advantage of modular stamping is that it can organically combine the flexibility of the stamping fabrication system with efficient production. Flexibility has a broad meaning, such as various requirements for the geometric shape of stamping parts, which can be obtained through free programming, which reflects the flexibility of the fabrication shape. Another example is that it is not only suitable for the production of large-scale single-variety stamping parts, but also has the advantage of small-batch and multi-variety fabrication, and also shows flexibility.
(2) Sub-millimeter stamping technology
Sub-millimeter stamping technology means that the precision of the stamping parts of the automobile body is controlled within the range of millimeters, which is a very big improvement compared with the errors commonly used in the manufacturing industry in the past. This is a comprehensive project aimed at improving stamping quality and manufacturing technology.
The center of sub-millimeter stamping is the accuracy and sensitivity of the stamping parts. The accuracy is to control the dimensional accuracy of the stamping parts at the level of millimeter or sub-millimeter. The body covering parts have a large degree of segmentation, such as the use of integral left and right side panels and top cover panels. The meaning of sensitivity refers to including mold design, sample manufacturing and tooling preparation time to achieve the purpose of greatly shortening the manufacturing cycle of new models. The project includes integrated design of stamping and assembly, sensitive design and manufacturing of stamping system, and stamping process. Intelligent detection and monitoring, system-wide integration, etc.
(3) Special stamping forming technology
The technical requirements of modern automotive stamping parts are developing in the direction of complex structure, increased block size, more components on related sides, increased bearing capacity and strict internal stress restrictions. This requires and promotes the development of special stamping forming technologies such as hydroforming, precision forming, explosive forming, spin forming, dieless forming, laser forming and electromagnetic forming.
(4) Automatic monitoring of stamping process
Another important feature of modern stamping technology is the automatic monitoring of the stamping process to protect the quality of stamped parts. In the automatic detection and monitoring of sub-millimeter stamping projects, its research results include: 1. On-line transmission diagnosis and detection system for feature analysis of stamping process; 2. High-speed and non-contact stamping parts measurement system; 3. Die maintenance Scientific guessing system; 4. Online adjustment and compensation system for key parameters of stamping forming, etc.
The main reasons for the changes in the quality of the workpiece caused by the stamping process are the wear of the concave and convex dies, cracks and dislocation of the dies, etc. These small changes can be tracked and detected by high-resolution displacement transducers and stamping force transducers. Among them, displacement measurement is a very important measurement. The device is usually composed of a source installed above the mold and a receiving unit located below it. It can monitor deviation, track the whole process of fabrication, output monitoring information in time, and alarm and stop.
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