How about analyzing the development trend of automobile stamping parts technology?

2023-04-11 08:40:10

The stamping process is one of the processing methods to complete metal plastic forming. Usually, the press and the mold apply external force to the sheet, strip, pipe and profile to cause plastic deformation or separation, so as to obtain the desired shape and size of the workpiece. Such as various covers on the body, interior supports, structural reinforcements, and a large number of auto parts, such as engine exhaust elbows and mufflers, hollow camshafts, oil pans, engine brackets, frame structural parts , horizontal and vertical beams, etc., are all developed by stamping forming technology in the direction of precision, multi-function, high-efficiency, energy-saving, safe and clean production. The manufacturing process level and quality of stamping workpieces have a direct impact on the quality of automobile manufacturing to a large extent. Impact. The following introduces the development trend of automobile stamping parts technology:

1. Adaptive selection of stamping process

The adaptability of the stamping process refers to whether the designed stamping parts meet the process requirements of stamping processing in terms of size, dimensional accuracy and benchmark, and structural shape. Automobile stamping parts should have good craftsmanship and economy. The important indicators to measure its level include the number of stamping parts, the number and size of the body assembly, the structure of stamping parts and other factors.

Reducing the number of processes in the stamping process means reducing the number of stamping pieces, saving the number of tooling, simplifying the transfer device in the stamping process, reducing operators and stamping floor space, and is an excellent measure to save investment and energy consumption. Moreover, modern automobile manufacturing uses a large number of high-strength steel sheets and galvanized steel sheets with coil materials and thin-shell overall body structures, all of which require the application of new stamping processes.

Second, the development trend of modern stamping forming technology

(1) Modular stamping technology

The outstanding advantage of modular stamping is that it can organically combine the flexibility of the stamping processing system with efficient production. Flexibility has a wide meaning, such as the various requirements of the geometric shape of stamping parts, which can be obtained as long as it is freely programmed, which reflects the flexibility of the processing shape. Another example is that it is not only suitable for the production of large-volume single-variety stamping parts, but also has advantages in small-volume and multi-variety processing, and also shows flexibility.

(2) Submillimeter stamping technology

Sub-millimeter stamping technology means that the precision of automobile body stamping parts is controlled within the range of millimeters, which is a great improvement compared with the errors commonly used 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 precision and sensitivity of stamping parts. The accuracy is to control the dimensional accuracy of stamping parts at the millimeter or sub-millimeter level. The key is to control the size change of structural parts such as body brackets and columns, and make The body panels have a large degree of segmentation, such as the use of integral left and right side panels and roof panels. The meaning of sensitivity refers to including mold design, sample manufacturing and tooling preparation time, in order to achieve the purpose of greatly shortening the new model manufacturing cycle. Intelligent detection and monitoring, full system integration, etc.

(3) Special stamping forming technology

The technical requirements of modern automobile stamping parts are developing in the direction of complex structure, increased block size, more parts on related sides, larger bearing capacity and strict internal stress restrictions. This requires and promotes the development of special stamping forming technologies such as hydraulic forming, 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 the stamping process to protect the quality of stamping parts. In the automatic detection and monitoring of the sub-millimeter stamping project, the research results include: 1. The characteristic analysis of the stamping process and the online diagnosis and detection system; 2. The high-speed and non-contact stamping parts measurement system; 3. The maintenance of the stamping die Scientific guessing system; 4. On-line adjustment and compensation system of key parameters of stamping forming, etc.

The main causes of workpiece quality changes during the stamping process are wear, cracks, and die misalignment of concave and convex dies. These small changes can be tracked and detected by high-resolution displacement sensors and stamping pressure sensors. Among them, displacement measurement is an extremely important measurement. The device is usually composed of a shut-off source installed above the mold and a receiving unit located below. It can monitor deviations, track the entire process of processing, output monitoring information in time, and perform alarm shutdown.