In the field of heavy machinery manufacturing (such as engineering machinery, metallurgical equipment, shipbuilding), core components often have the characteristics of "large size, high weight, and high rigidity requirements". Traditional processing equipment is difficult to balance "large-scale processing" and "high-precision control". The CNC double headed gantry milling machine, with its characteristics of "gantry frame structure, multi axis linkage control, and strong load-bearing capacity," has become the core equipment for processing such parts. Its key applications are concentrated in the processing of basic components, transmission components, and structural components of heavy machinery, providing precision guarantees for the stable operation of heavy machinery.

The key application of CNC double headed gantry milling machine in heavy machinery machining is first reflected in the plane and contour machining of large basic components. The basic components of heavy machinery, such as bed frames, bases, workbenches, etc., not only have large dimensions (such as lengths exceeding 10 meters and weights exceeding tens of tons), but also need to ensure high flatness and parallelism (usually requiring ≤ 0.05mm/m) to ensure the assembly accuracy of subsequent components. The gantry frame of the milling machine adopts integral casting or welding structure, with strong rigidity and small deformation, and can carry large workbenches (with a load-bearing capacity of up to 100 tons), achieving stable support for heavy foundation components; At the same time, its crossbeam can be equipped with multiple milling spindles, which are controlled by a CNC system to interlock along X, Y, and Z axes, completing processes such as flat milling, step machining, and groove milling in one go, avoiding positioning errors caused by multiple equipment transfers. For example, in the machining of the base of construction machinery excavators, this milling machine can synchronously complete the milling of the base installation surface and the hydraulic valve hole positioning plane, ensuring that the parallelism of each plane meets the assembly requirements and reducing the risk of subsequent hydraulic system leakage.

Secondly, in the complex structural machining of heavy-duty transmission components, CNC double headed gantry milling machines demonstrate significant advantages. The gearbox housing and other transmission components of heavy machinery are equipped with multiple sets of bearing holes and gear installation grooves inside, and the positional accuracy of the hole system and groove system is strictly required (such as hole spacing tolerance ≤± 0.02mm). Milling machines can achieve multi angle machining of workpieces by installing CNC turntables or indexing heads, without the need for repeated clamping, and can complete the machining of hole and groove systems on the side and top surfaces of the box; Its high-precision ball screw and servo drive system can accurately control the spindle feed and displacement, ensuring that the coaxiality and parallelism of the hole system meet the standards. Taking the machining of ship reducer casing as an example, a milling machine can complete the boring, milling, and chamfering of multiple sets of bearing holes inside the casing at once through four axis linkage, avoiding the hole position deviation caused by traditional sequential machining and ensuring smooth meshing between gears and bearings.

In addition, CNC double headed gantry milling machines also play an irreplaceable role in the machining of irregular contours of large structural components. The structural components such as frames and columns of heavy machinery often require processing of irregular contours such as arcs and slopes to adapt to the overall structural layout of the machine. The multi axis linkage function of this milling machine (such as X, Y, Z, A axis linkage) can generate machining paths based on the 3D model of the part, drive the spindle to move along the irregular contour trajectory, and complete contour milling with a dedicated milling cutter; The gantry frame has a large span (up to 5 meters), which can cover the overall processing range of large structural components, avoiding segmented processing errors caused by parts exceeding the equipment processing stroke. For example, in the processing of metallurgical equipment rolling mill stands, the CNC double headed gantry milling machine can complete the milling of the inner arc-shaped support surface of the stand in one go, ensuring the fit between the support surface and the rolling mill, and improving the rolling accuracy of the rolling mill.

The CNC double headed gantry milling machine solves the accuracy and range bottleneck of traditional equipment in the processing of basic components, transmission components, and structural components by adapting to the "large, heavy, and precise" processing requirements of heavy machinery parts. It has become a key equipment in heavy machinery manufacturing to ensure processing quality and improve production efficiency, providing important support for the technological upgrading of the heavy machinery industry.