A few days ago, China Foundry Association released the third comprehensive list of China's foundry industry. Yuchai's comprehensive strength has ranked 25th among the top 100 in China's foundry industry. The foundry division of Yuchai was selected as China's Casting industry automotive casting industry leader in the top ten!
High intelligence, bid farewell to dirty and hardship
In Yuchai, Yanjia owns the world's most advanced level of casting production lines. The products cover the light, medium and heavy-duty series of engine blocks, cylinder heads and crankcases and other key core castings. The comprehensive scrap rate is only 1%.
All the casting production lines use robots for coring, core assembly, dip coating, drilling, handling, and lettering. The production efficiency is high and the labor intensity of employees is greatly reduced.
Yuchai also made great efforts to improve the working conditions in the casting site. The goal was 'dead dust, no dust, no dust, less dust, less dust, less dust and less dust.'
In addition, the planned area of green plants accounts for 20% of the Yuchai foundry area, which is a veritable green workshop.
Intensive development, 80% recycling of waste sand
As China Green Casting Demonstration Enterprise, Yuchai pioneered domestic heat treatment for residual heat treatment of cast parts to ensure casting quality and energy conservation and environmental protection. Calculating annual casting of 100,000 tons of castings, it can save more than 3,600 tons of standard coal per year.
At present, all of Yuchai's casting molten iron smelting is performed using a single medium-frequency electric furnace, which ensures the stability of various cast iron grade materials, improves the intrinsic quality of the castings, and effectively eliminates dust emission.
Yuchai also implemented the recycling of industrial waste, achieved more than 80% of the recycling of waste sand, and reduced the discharge of more than 100,000 tons of waste sand each year.
Cast black technology selected for intelligent manufacturing
The national smart manufacturing new model project “Digital and Large Engine Block Digital Casting Workshop” was approved in 2015. It is the first batch of new smart manufacturing projects of “Made in China 2025”, the first intelligent project in Guangxi and the industry, and the project will be fully completed in 2017. .
The project has upgraded the Yuchai casting production line and the rapid prototyping workshop through intelligent, digital, informatization and networking. Through intelligent upgrades, Yuchai's casting production efficiency has increased by more than 20%, and the defective product rate has dropped by more than 10%. Energy use The rate increased by more than 10% and became the industry benchmark.
Using dieless casting precision molding technology, the high-quality cylinder block and cylinder head castings produced are characterized by thin wall, light weight and high strength, which lays a solid foundation for Yuchai to build a world-class S6 engine.
The cradle of talent
Lu Denghong - China's Outstanding Women Workers
In March 2017, Lu Denghong, the chief designer of Yuchai's stock mold technology, was honored as the fourth 'Chinese Outstanding Women's Foundry Worker' and became the only woman in Guangxi who won this honor.
As a technical person in charge, Lu Denghong led the technical team to overcome one or more quality difficulties. The method of casting the anti-deformation capacity of the cylinder head of a multi-cylinder and cover engine, and the automatic casting method of the complex engine body of diesel engines were recognized by domestic industry experts. , And won the China Machinery Manufacturing Process Technology Achievement Award.
Li Guohua - China Foundry Craftsman
In May 2018, Yu Guochao's foundry master Li Guohuan was awarded the honor of “Chinese Casting Craftsman” in the highest honor of the Chinese foundry industry.
In the past 22 years, Li Guohua has dealt with sand and paint every day, and he has practiced the method of “sand management of sand”, sand core fastening operation method, sand core “seamless connection” operation method, sand core exhaust application lost foam method, etc. Unique skills, played a significant role in improving the quality of castings.
Li Guohua also explored a set of self-hardening furan resin molding process suitable for Yuchai. The new sand resin addition rate dropped from 1.5% to 1.1%, and the recycled sand resin addition amount dropped from 1.4% to 0.85%, which greatly shortened Yuchai. The gap between the level of casting technology and the level of international advanced casting companies.