"This large, transfer press has different phases in different countries, from the 70s to the late 90s. High cost, high efficiency and poor flexibility are the main characteristics of this press.

In the early 80s, Jier Machine Tool introduced a full set of technology from VERSON, while Yizhong, Shangzhong, and Qiqihar Second Machine Tools respectively introduced some of Komatsu's molding products, and provided dozens of mechanical sheet stamping production lines for domestic automobile manufacturers such as Beiqi Jeep and Jiangxi Isuzu.

It can be said that the products at this stage are the level generally mastered by the domestic machine tool factories", Pi Wei told Jiang Hui about the second stage of the development of the stamping production line.

"The press is a very basic equipment, not only the automotive industry can be used, other industries are also in demand, Liao Yun, you remember, let Mr. Guan see if there is a suitable opportunity, we will buy a stamping equipment manufacturer this year back", Jiang Hui listened to Pi Wei's words, and said to Liao Yun on the side.

In terms of machinery and equipment, domestic technology is generally lagging behind Europe and the United States, people have accumulated technology and experience for a hundred years, it is really not that you can surpass it in a day or two, thinking about overtaking in corners every day, where do you come from so many curves?

finally encountered a once-in-a-decade financial crisis, Jiang Hui definitely took this opportunity to buy and buy desperately!

If you miss this time, you may not be able to buy it in the future, even if you have money.

"You continue", Jiang Hui motioned for Pi Wei to continue the introduction.

"Okay, Mr. Jiang. The third stage is the widespread application of electronic technology on the press line. For stand-alone connection, with the development of electronic technology, servo-driven loading and unloading devices have been widely used, and electronic two-coordinate feeding devices have appeared one after another.

"During this period, the speed of the press has been significantly improved, the production efficiency and cycle time have also been significantly improved, such as ADC technology, self-propelled mold clamp, tonnage monitoring, temperature monitoring, automatic adjustment of balancer air pressure, automatic adjustment of air cushion air pressure, automatic adjustment of mold height, automatic adjustment of air cushion stroke and other technologies have also been widely used."

And then there is the fourth stage, which is the latest stage that we are in now. With the advent of a new type of automated stamping line, at present, it can be considered that stamping technology has begun to enter the fourth stage of development.

The modification of automobiles is becoming more and more frequent, and the personalized needs of the automobile market are also increasing, so the flexible requirements for automobile production are also getting higher and higher.

In terms of stand-alone connection, robot technology is becoming more and more perfect, the cost is getting lower and lower, the use is becoming more and more popular, its flexibility is more and more showing its superiority, and more and more stamping lines are beginning to be equipped with robot automation systems."

"Does our production line belong to the third or fourth stage?" Jiang Hui asked.

"Actually, it's neither, it's between the third and fourth stages," Pi Wei's answer was a bit unexpected to Jiang Hui.

"Oh, why?", Jiang Hui asked.

"In terms of large-scale multi-station presses, CROSSBAR presses are becoming more and more limited due to the high manufacturing difficulty and high cost, the high requirements for the manufacturing technology and quality of the molds, and the restriction of flexibility.

At this time, a new type of automated press line between the CROSSBAR and the stand-alone automation line was put into use, and we used this press line," explains Pi Wei.

"The number of strokes of this kind of press is high, and for large presses, the number of continuous stamping times is 20 to 22 times per minute, while in the first stage of the stamping line, the press can only press five or six times per minute", seeing that Jiang Hui did not continue to ask himself, Pi Wei went on to introduce the stamping production line used by Guanghui Automobile.

"There is a fast feeding device between the presses, which has the same and different points as the feeding form of CROSSBAR, the similarity is that its function is exactly the same as that of CROSSBAR; the difference is that CROSSBAR has only one feeding device for the whole line, which is used for feeding the whole line, and this feeding device, each unit is independent.

In the case of the CROSSBAR transfer station, the presses share a common drive shaft, and for the fast feed line, each press has its own drive shaft, and the press is operated in a single run. The production cycle time is a bit lower than that of CROSSBAR, but it can still reach 12~14 pieces/min", continues Pi Wei.

"The press itself can press 20 to 22 times per minute, but the propeller shaft can only pass 12 to 14 parts, can I understand that?" Jiang Hui immediately grasped the crux of the problem.

"It's true that under this combination model, the one-time investment can be greatly reduced, and the flexibility of the production line has also been greatly improved, and the American car factories have been using this technology on a large scale," said Pi Wei.

For the stamping workshop, the production equipment is the most obvious one-time investment, and the cost reduction is very obvious when using equipment that does not require such high accuracy.

However, there is another piece that is actually a very important one-time investment, and that is the mold.

In modern industrial production, the mold is an important process equipment for the production of various industrial products, which shapes the raw materials in a certain way with its specific shape.

In the automobile industry, in various types of automobiles, an average of about 2,000 sets of stamping dies are needed for a model, including nearly 300 sets of large and medium-sized cover molds.

Mold has become one of the important means and process development direction of contemporary industrial production. The variety development of modern industrial products and the improvement of production efficiency depend to a large extent on the development and technical level of molds.

At present, molds have become one of the important symbols to measure the manufacturing level of a country

Strictly speaking, the mold is not a one-time investment in the construction of the plant, but the reason why the mold is regarded as a one-time investment is because the mold of each project is different and has a very strong uniqueness.

In other words, if the amount used by Guanghui Automobile is the fourth stage of stamping line technology, then due to the very high requirements for molds, it will lead to a very high mold investment for each model in the future.

Therefore, when calculating the one-time investment cost, the project team also calculated the impact in this regard.

"You are the most professional, as long as you think this method is the most suitable, I have no opinion, however, sometimes we can't blindly save money and make our production line not advanced enough, which should be fully taken into account in the future capacity expansion," Jiang Hui said.

Jiang Hui, under the leadership of Kato and Pi Wei, took a turn in the stamping workshop.

Since the installation of the overhead crane is only arranged today, and various large-scale stamping machines have not yet officially entered the site, the stamping workshop is not too much to see for the time being.

"Thank you Mr. Jiang for your trust, we will fully consider this issue in the follow-up. Mr. Jiang, let's go to the welding workshop for a visit next", Pi Wei said, pointing to a workshop next to him.

(End of chapter)