What is the development trend of modern automobile stamping technology?

2022-07-05 17:00:27

(1) Modular stamping technology

The outstanding advantage of modular stamping is that it can organically combine the flexibility of stamping processing system with efficient production. Flexibility has a wide meaning, such as the various requirements for the geometric shape of stamping parts, which can be obtained by free programming, reflecting the flexibility of machining shape. For example, it is not only suitable for the production of large-scale single variety stamping parts, but also gives play to the advantage of small-scale multi variety processing, and also shows flexibility.

(2) Submillimeter stamping technology

Submillimeter stamping technology means that the precision of automotive body stamping parts is controlled within the range of mm, which is a great progress compared with the error prevailing in the past manufacturing industry. 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 stamping parts. The accuracy is to control the dimensional accuracy of stamping parts at the level of mm or sub millimeter. The key is to control the ruler change of body supports, columns and other structural parts, and to make the body covering parts more segmented, such as using the overall left and right side plates and top cover plates. Sensitivity means that it includes mold design, sample manufacturing and tooling preparation time, so as to greatly shorten the manufacturing cycle of new models. The project includes integrated design of stamping and assembly, sensitive design and manufacturing of stamping system, intelligent detection and monitoring of stamping process, and full system integration.

(3) Special stamping technology

The technical requirements of modern automotive stamping parts are developing in the direction of complex structure, increased block size, more parts on related edges, larger bearing capacity and strict internal stress limitation. This requires and promotes the development of special stamping forming technologies such as hydroforming, precision forming, explosive forming, spinning 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 stamping process to protect the quality of stamping parts. In the automatic detection and monitoring of sub millimeter stamping project, the research results include: 1 The characteristic analysis of stamping process is transmitted to online diagnosis and detection system; 2. high speed and non-contact measuring system for stamping parts; 3. scientific guess system for die maintenance; 4. on line adjustment and compensation system for key parameters of stamping forming.

The main causes of workpiece quality change in stamping process are wear, crack and die dislocation of concave convex die. These small changes can be tracked and detected by high-resolution displacement sensor and impulse pressure sensor. The displacement measurement is a very important measurement. The device is usually composed of a closed source installed above the mold and a receiving unit located below. It can monitor the deviation, track the whole process of processing, output the monitoring information in time, and alarm and shutdown.