The modern automobile industry with the production scale, the model features small volume, variety changes quickly, many models of production lines, the characteristics of autobody panel also present large-scale, integration, these trends require stamping technology and equipment to keep the flexibility and automation direction, automatic stamping equipment of high flexibility and high efficiency are gradually replacing the rigid the traditional production line, has become the mainstream of world stamping production.
One, stamping equipment
For a long time, the traditional stamping equipment because of its stable production conditions to ensure the quality of stamping parts, mold use is relatively durable, but the lack of flexibility is the obvious defect of this mode of production. Integrated control technology, servo drive technology applied in press brings more flexibility to the stamping, large multi station press, flexible automatic press line and other equipment is rewriting the history of stamping production.
1, integrated control
In order to meet the requirements of production flexibility, all control functions of press should be integrated, so as to realize the menu management a full set of mold, set the parameters of each link includes slide stroke adjustment, pressure balancer adjustment, cushion stroke adjustment and automatic control system etc.. Fieldbus technology is a field communication network, field equipment interconnection, interoperability, distributed interactive function module, open function is to control the development direction of the press, has obvious role in promoting the realization of automation.
Integrated press control system can be realized through a single interface to realize the operation of all the press and mold control function, including fault diagnosis, menu mould configuration, programmable limit switch and the mold monitoring and adjustment, and make the maintenance more convenient, but also significantly increase the effective working time of press.
The most prominent feature of the servo drive system is directly connected with the motor eccentric crank gear, the motor speed can be adjusted, which can adjust speed of crank mechanism, arbitrary speed up or slow down the stamping speed.
Another big characteristic of servo press is high matching. The motor speed servo press is adjustable, so it is possible to achieve motion stamping and blanking force of stepless adjustment in the stamping process, the working curve of press and a variety of different applications to match. In order to ensure the completion of the crank accurate motion, the user can slow drawing processing to achieve or maintain the stamping velocity constant, which can not only improve the quality of sheet metal processing, but also can prolong the service life of the mold.
The speed change and control of servo press through rational optimization design, and the use of integrated modules according to the modular structure of manufacturing, if you don't need to use the servo function, the machine can work like traditional press, maintain a constant power and stroke.
2, flexible stamping automatic line
Flexible stamping automatic line mostly by a double action stretching press or multi link single action stretching press and 4 ~ 5 single action press assembly line, production of large body cover, high safety, good stamping quality. Loading and unloading system for production line layout automation by unstacking machine, cleaning and oiling machine, the feeding machine, manipulator (robot), the shuttle (flip) automatic conveyer is expected from the blank on the stamping line are completed automatically. Production beats up to 6 ~ 9 times /min. The whole stamping line of 60 ~ 80m, about 6 to 7 workers.
Some enterprises are using the international advanced high-speed compact stamping line, can quickly improve the production efficiency of stamping machine. The plate material is positioned by advanced optical camera system. Drawing press selection of hydraulic NC cushion, each with a unit automation manipulator advanced, eliminating the shuttle conveyor, shorten the transportation distance, reduce press spacing, takt time up to 10 /min.
With the competition in Chinese auto market is growing, appearance and intrinsic quality of the automobile has become the automobile manufacturers compete for market prerequisite is an indisputable fact, therefore, the mechanization and automation of the production mode of stamping production is the most effective way to improve the appearance quality of the automobile.
3, large multi station press
The large-scale multi position press which can carry on the flexible stamping production represents the highest level of the international stamping technology, and is the development direction of the body panel stamping forming equipment. Large multi station press machinery, electronics, control and detection technology, can realize the automatic, intelligent, safe operation, high productivity, high product quality, low cost, to meet the needs of the automotive industry for mass production. Of course, technology and performance of press itself in nearly more than and 10 years of practice in the continuous improvement and development, such as: drawing station with variable speed multi link mechanism, hydraulic NC cushion instead of double action press, field bus control technology application.
At present, Europe and the United States well-known car manufacturers to adopt automatic press large multi station press bar type and mass production of body parts, precision and surface quality to meet the highest standards of contemporary automotive stamping parts. China is currently no automobile production enterprises with large multi station press, its main reasons: one is the equipment of large one-time investment; two is the domestic car manufacturers started late, the existing stamping equipment enterprises is still in the service period, this also to a certain extent has restricted our country steam