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In May 2009, Wuhan Heavy-duty Machine Tool Group Co., Ltd. delivered the DL250 5-meter CNC super-heavy horizontal boring lathe machine for the key equipment of the “11th Five-Year†national key project manufactured by China Duzhong. After 4 months. Running, reflecting good condition. The successful development and putting into use of this equipment is of great significance to improving the level of China's equipment manufacturing industry and strengthening China's national defense security and industrial safety.
The DL250 5-meter CNC super-heavy horizontal boring lathe is a new product independently developed and manufactured by Wuzhong Group. It is the world's largest ultra-heavy-duty CNC horizontal lathe, which can be widely used in hydropower, nuclear power, shipbuilding and aerospace industries. The total weight of the machine tool is 1,450 tons, of which the headstock weight is 177 tons, and the spindle end face jump and radial runout are within 0.008 mm. The maximum turning diameter is 5 meters, the maximum processing diameter of the tool holder is 4.5 meters, the maximum processing length is 20 meters, the maximum pupil diameter is 3.5 meters, the pupil depth is up to 8 meters, and the maximum load is 500 tons. In addition to the basic functions of a heavy-duty horizontal lathe, the equipment can also perform CNC machining of tapered surfaces, curved surfaces, stepped shafts, grooves and threads. With different accessories, it can be used for milling, grinding, boring and cranking, and has deep hole boring, automatic tool setting and automatic measurement of workpiece size.
In this major technical equipment with completely independent intellectual property rights, Wuzhong Group has achieved three major technological breakthroughs:
(1) The ultra-heavy-duty high-precision headstock of this equipment has a large weight, high strength and rigidity requirements, and has reached the limit of the current world headstock manufacturing. Through independent research and development, Wuzhong Group has broken through the key technology of ultra-heavy-duty high-precision hydrostatic spindle bearings, and obtained a series of key data such as flow, pressure and oil film thickness of ultra-heavy-duty high-precision hydrostatic bearings, making the headstock super heavy-duty and high-precision. The hydrostatic bearing has a radial runout of 0.006 mm, which is the world's leading level.
(2) The research and precision of the manufacturing process of the ultra-long bed reached the domestic leading level. The length of the machine bed is 45 meters, the error of the guide rail reaching any length of 1 meter is not more than 0.015 mm, the error within any length of 20 meters is not more than 0.16 mm, and the error within the length of 45 meters is not more than 0.27 mm. Wuzhong Group has successfully developed a high-precision CNC double-gantry mobile boring and milling machine with a maximum moving stroke of 57 meters using ultra-long profiling technology. It provides reliable technical support for ultra-long bed processing and reaches High linear accuracy.
(3) The first domestic three-group three-channel numerical control technology and three-axis synchronization technology. The DL250 5-meter CNC heavy-duty sleeper adopts double working group and three-channel mode to ensure that the two tool holders and boring holders can be completely controlled and fed independently, which improves the processing efficiency and makes the operation more convenient.
The DL250 5-meter CNC super-heavy horizontal boring lathe is a new product independently developed and manufactured by Wuzhong Group. It is the world's largest ultra-heavy-duty CNC horizontal lathe, which can be widely used in hydropower, nuclear power, shipbuilding and aerospace industries. The total weight of the machine tool is 1,450 tons, of which the headstock weight is 177 tons, and the spindle end face jump and radial runout are within 0.008 mm. The maximum turning diameter is 5 meters, the maximum processing diameter of the tool holder is 4.5 meters, the maximum processing length is 20 meters, the maximum pupil diameter is 3.5 meters, the pupil depth is up to 8 meters, and the maximum load is 500 tons. In addition to the basic functions of a heavy-duty horizontal lathe, the equipment can also perform CNC machining of tapered surfaces, curved surfaces, stepped shafts, grooves and threads. With different accessories, it can be used for milling, grinding, boring and cranking, and has deep hole boring, automatic tool setting and automatic measurement of workpiece size.
In this major technical equipment with completely independent intellectual property rights, Wuzhong Group has achieved three major technological breakthroughs:
(1) The ultra-heavy-duty high-precision headstock of this equipment has a large weight, high strength and rigidity requirements, and has reached the limit of the current world headstock manufacturing. Through independent research and development, Wuzhong Group has broken through the key technology of ultra-heavy-duty high-precision hydrostatic spindle bearings, and obtained a series of key data such as flow, pressure and oil film thickness of ultra-heavy-duty high-precision hydrostatic bearings, making the headstock super heavy-duty and high-precision. The hydrostatic bearing has a radial runout of 0.006 mm, which is the world's leading level.
(2) The research and precision of the manufacturing process of the ultra-long bed reached the domestic leading level. The length of the machine bed is 45 meters, the error of the guide rail reaching any length of 1 meter is not more than 0.015 mm, the error within any length of 20 meters is not more than 0.16 mm, and the error within the length of 45 meters is not more than 0.27 mm. Wuzhong Group has successfully developed a high-precision CNC double-gantry mobile boring and milling machine with a maximum moving stroke of 57 meters using ultra-long profiling technology. It provides reliable technical support for ultra-long bed processing and reaches High linear accuracy.
(3) The first domestic three-group three-channel numerical control technology and three-axis synchronization technology. The DL250 5-meter CNC heavy-duty sleeper adopts double working group and three-channel mode to ensure that the two tool holders and boring holders can be completely controlled and fed independently, which improves the processing efficiency and makes the operation more convenient.
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