The establishment of Huaxing Construction Machinery Technology Co., Ltd. is an important step for Huaxing Group to get involved in the field of construction machinery, but in this regard, the accumulation of Huaxing Group itself is not enough, so the company is mainly to set up a technical team, more than a year has recruited more than 2,000 engineering and technical personnel, and it is also from the original Ishikawa Island Construction Machinery Company to transfer more than 600 backbone technicians to join the technology research and development center here.

With so many technical teams, various expenses will cost almost one billion yuan a year, and various tests of products, Huaxing Construction Machinery Co., Ltd. has invested nearly two billion yuan in the early stage, and only the first medium and large excavator has been offline this year.

However, for technology research and development, Yang Jie has always been stingy, and now a large number of domestic infrastructure projects have begun to be launched, the market space is huge, as long as more and more high-quality products come out, Huaxing Construction Machinery will still be able to live well in the future.

After attending the ceremony, Yang Jie also specially inspected the workshop of the trial production of the hard rock full-section TBM, accompanied by technical experts such as Mao Tsuka, Xu Guang, etc., who carefully reported to Yang Jie the progress of the huge shield machine with a diameter of 6 meters in front of him.

At this time, the shield and cutterhead have been developed, and technical experts such as Tehiko Geruzuka have also optimized the design of the cutterhead.

The hard rock tunnel boring machine designed and developed by Huaxing Construction Machinery is also in cooperation with the Railway Construction Heavy Industry Roadheader Research Institute, which is specially developed for the geological characteristics of high stress, high water pressure, high ground temperature and easy rock explosion in the western mountainous area.

Because the geological conditions in China are very complex, the price of these hard rock tunnel boring machines imported before is high, and the standardized products are prone to problems when encountering these complex geological conditions, and it is very difficult to maintain.

Moreover, the tunnels in these areas are very long, some of them are even close to 30 kilometers, and the excavation distance is about 100 meters per month if the traditional drilling and blasting method of drilling and blasting is used, and this construction method is primitive and extremely dangerous.

After the establishment of Huaxing Construction Machinery Technology Co., Ltd., technical experts such as Tehiko Geruzuka and Xu Guang carried out special optimization of the cutterhead for extremely hard formations such as granite and tuff, and the cutter used special alloy materials developed by Huaxing Group.

The cutterhead is one of the most critical components of the shield machine, it is the tooth of the shield machine, if the cutter on the cutterhead is not good, it will not be able to gnaw these hard rocks, and even the cutterhead is inlaid with very wear-resistant composite alloy materials.

Huaxing Group in the material technology from more than 10 years ago from the big Mao Ermao digging a lot of material experts over, and from the eagle sauce domestic is also digging including Liu Fuping a large number of material experts to research and development, and these years has been on the material research and development of considerable investment, these years Huaxing Group can produce and provide a variety of high-end alloy materials, now Huaxing Group of its own subsidiaries to design what products need to meet what performance requirements, these materials Huaxing Group itself is able to provide。

In the past, Ishikawajima Construction Machinery Design had to purchase ready-made materials from material suppliers, and no new materials were developed specifically for the product.

However, the working mode of Huaxing Group is different, and the material development is carried out around the product performance requirements, after the company needs what products to meet what performance requirements, the material research and development departments of subsidiaries such as Zhongyuan Metallurgical Technology Co., Ltd. and Longyuan Rare Earth Technology Co., Ltd. and Yonghan Aviation Technology Co., Ltd. will carry out targeted development for these requirements.

Now the life of this kind of shield machine in foreign countries is generally 20 kilometers, that is to say, some parts can be replaced after 20 kilometers of tunneling, but like some domestic tunnels of more than 30 kilometers, this must be stopped for maintenance, so Huaxing construction machine at the beginning of the design requires that the service life of the cutter on the cutterhead should reach at least 30 kilometers.

Because this kind of shield machine can not turn back and go backwards now, if it is better to just replace the cutter, if the cutterhead is broken in the middle of the road, it is necessary to dig a shaft above the tunnel to lift the removed cutterhead to repair it outside, and the amount of work is still very large.

In order to meet the design requirements, the material research and development department of Huaxing Group Company also provides special alloy materials with more wear resistance after technical research.

Through testing, the tools prepared from this material have better performance than the materials used by Ishikawajima Construction Machinery in terms of wear resistance, strength, and toughness.

Because the material is not the same, Huaxing Construction Machinery also has to develop the processing technology and welding process of this special alloy material, although the company has not been established for a long time, but now it has mastered a full set of technical patents for cutterhead cutters.

"Yang Shao, the cutterhead and cutter we developed can be said to be like cutting rocks like mud, all rocks are difficult to defeat it, and can ensure that at least 1,000 meters of excavation can be carried forward every month. ”

Xu Guang said.

Yang Jie nodded, and then climbed on the back of the shield of this shield machine to understand in detail.

Originally, Ishikawajima Construction Machinery used a cutterhead drive system with hydraulic drive, and although the hydraulic motor could be made small in size and had good synchronization performance, it still had the disadvantages of low efficiency and high noise.

Huaxing Group has a very strong technical strength in motor technology, so this time it was also replaced by a variable frequency motor drive mode.

This system is selected from the mature motor products and motor inverters of the subsidiaries of Huaxing Group and the PLC of Ximenkang Company, and Huaxing Construction Machinery Company has written a set of control programs by itself.

Through a series of tests, the drive system also showed excellent performance and met the design requirements.

Yang Jie is not too worried about this subsystem, because the technical strength of Huaxing Group has reached this height, and Ishikawajima Construction Machinery has a lot of experience in this area, and it is abnormal if it is not done well.

Such a hard rock full-section roadheader is now quoted abroad is basically more than 200 million, and now all the domestic dependence on imports, are domestic construction units begging others, Yang Jie will not worry that there will be no market after such a product comes out.

Now that the design of this roadheader has been completed, the assembly will not be completed until the second half of next year, and the next year will be supplied in batches, just to keep up with the progress of large-scale infrastructure projects in China.

Moreover, the profits of this kind of high-end equipment and related technical services are actually very high, and the gross profit margin can reach about 30%, which is a great "way to make money".