Customer Name: Zhiqi Railway Equipment Co., Ltd.
Workpiece name: moving car wheel
Workpiece material: CL60
Machine tool: Milling compound center DMU 125 FD duoBLOCK® and DMC 125 FD duoBLOCK®
Abstract: The customer currently has 6 DMG Milling and Compounding Centers DMC 125 FD duoBLOCK® and 1 DMU 125 FD duoBLOCK® as a production line that is well versed in wheelset machining.
Project highlights
· Complete machining of turning, drilling, boring, and tilting oil holes in one setup.
· The milling and turning process makes the dynamic balance coefficient of the parts reach a higher index, and greatly improves the machining efficiency and machining accuracy.
· The double exchange table structure design makes the auxiliary clamping time of the workpiece almost zero.
· On-line infrared probe measurement technology ensures high precision machining of the hub hole.
Machine tool highlights
· Whether it's large tools or mold making, mechanical, automotive, model, instrument manufacturing, or aerospace industry, DMU/C FD milling and turning complex machining centers will be able to do their best in large batches of large workpieces.
· The gantry structure, which is most suitable for large workpiece machining, is designed as a machine tool to maximize the rigidity of the machine structure. At the same time, the thermal symmetrical structure has a liquid-cooled ball screw drive mechanism and has a cooling feed motor in all the shafts. The degree of durability is guaranteed to a certain extent.
· One-time clamping for milling/car composite machining
With only one clamping, it is possible to perform 5-sided (or) 5-axis milling and can perform turning operations with a maximum workpiece weight of 7 tons (DMU 340 FD). This composite machining solution not only reduces costs, reduces machining time, but also enables more flexible and ultra-precision machining. The new "turning" CNC rotary table uses a direct drive approach that combines turning and milling. This high-efficiency machining unit has a table speed of up to 250 rpm, a torque of 7,900 Nm or 10,800 Nm, a clamping torque of 7,390 Nm or 10,000 Nm, and the milling performance has never been better. In addition, the machine retains all the functions of a milling center, which is comparable to a pure milling machine.
Zhiqi Railway Enterprise Vision
Zhiqi is a professional high-speed wheelset manufacturer in China, which was born along with the trajectory of China's railway speed increase. Wheelset technology is one of the core technologies of high-speed EMUs. It has high technical content, high processing precision and complicated manufacturing process. It is not only one of the core equipments to ensure the safe and reliable operation of high-speed EMUs, but also an important part of independent innovation. The birth of Zhiqi has filled China's gap in this field and contributed safe, high quality and durable products to China's high-speed rail transit industry.
Zhiqi Railway Company Introduction
Zhiqi Railway Equipment Co., Ltd. is a joint venture between Shanxi Coal Import & Export Group Co., Ltd., Boao Investment Management Group Co., Ltd. and Italy Luqi Ni Railway Products Group. Founded in 2007, Zhiqi Company covers a total area of ​​462 acres. The company has wheel processing lines, axle processing lines, wheelset assembly lines and wheel alignment lines. It is an international professional manufacturer of high-speed railway EMUs. Its products cover the wheelsets of China's high-speed railway Harmony EMUs with a speed of 200-380 km per hour and the super-high-speed test trains with a speed of 400-500 km/h. Minister Ma Dazhao of the Ministry of Equipment said: "Although only a few years of development, Zhiqi currently has the processing and assembly capacity of 50,000 pairs of annual production of EMUs."
Since its inception, the company has placed quality first, and has ensured the production of high-quality, high-standard wheelsets in multiple ways. On February 28, 2009, the company's first high-speed EMU wheelset production line with world-class level was officially put into operation. At the commissioning ceremony, the company signed a 2 billion yuan round-to-sale sales contract and letter of intent with Qingdao Sifang Locomotive & Rolling Stock Co., Ltd., Changchun Railway Bus Co., Ltd. and BST. The high-speed EMU wheel-to-production line was put into operation, which not only filled the domestic gap in this field, but also made China's high-speed railway construction technology enter the international advanced ranks.
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