CNC GANTRY BORING MILLS

CNC Gantry Boring Mill (Fixed Gantry, Moving Table)

Worktable Width 1250 - 4000mm
Distance Between Columns 1800 - 4600mm
Max. Load Capacity (Worktable) Up to 10t/m²
Spindle Speed Max 6000rpm
CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
  • CNC Gantry Boring Mill (Fixed Gantry, Moving Table)
Portal boring mills for machining of large complex workpieces through boring, milling, drilling, tapping, and other operations

CNC fixed gantry machine can satisfy the rough and fine machining requirements for common milling, drilling, tapping, and boring of internal holes, external circles, planes, steps, conical surfaces, spherical surfaces, grooves, and 2D or 3D complex curved surfaces on various materials such as high-temperature alloys, titanium alloys, heat-resistant alloys, stainless steel, cast iron, and cast steel, including castings, forgings, and raw blanks.

The equipment is equipped with a single high-power boring and milling head on the crossbeam and features three CNC feed axes (X-axis - work platform, Y-axis - boring/milling head, and Z-axis - spindle), capable of two-axis or three-axis linkage. The X-axis dimension of the worktable can be designed according to customer requirements. The gantry width (Y-axis) does not exceed 8 meters, the height does not exceed 6 meters, and the square ram size is not less than 400x400mm.

The rotary motion of the boring/milling head spindle is driven by a spindle motor, and each feed axis is driven by an AC servo motor. A fixed-stroke, quantitative lubrication system is employed. The oil pump station for hydraulic and hydrostatic slide systems is equipped with a temperature control device.

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Applications

This machine is used for multi-variety, small to medium batch processing of precision complex parts in medium to large-scale automotive cold stamping die manufacturing, as well as in the aerospace and equipment manufacturing industries. It satisfies the rough and fine machining requirements for common milling, drilling, tapping, and boring operations on internal holes, external circles, planes, steps, conical surfaces, spherical surfaces, grooves, and 2D or 3D complex curved surfaces made from various materials such as high-temperature alloys, titanium alloys, heat-resistant alloys, stainless steel, cast iron, and cast steel (castings, forgings, raw blanks).

Features
The boring/milling head and ram utilize preloaded ball screw nut transmission pairs for movement. The worktable and boring head movements use high-linearity guide rails, ensuring high precision and rigidity.
The bed guideways are protected by metal telescopic covers, while the crossbeam guideways use accordion-type retractable protective covers.
Worktable movement (X-axis) is driven by a preloaded double-nut ball screw pair. Each feed axis end is limited by a three-contact switch, with an electrical soft limit providing double insurance.
Castings employ a box-type structure, optimized through Finite Element Method (FEM) analysis for good rigidity.
The three-axis feed system uses a direct-link drive with pre-tightened and stretched installation.
A large cross-section square ram (available in 500x500mm and 600x600mm sizes) allows for powerful cutting.
A German ZF dual-speed precision gearbox directly drives the spindle, enabling high-speed, high-power cutting.
Specifications
Models GMH2412/ GMH2112 GMH2416/ GMH2116 GMH2420/ GMH2120 GMH2425/ GMH2125 GMH2430/ GMH2130 GMH2435/ GMH2135 GMH2440/ GMH2140
Worktable Size Width [mm] 1250 1600 2000 2500 3000 3500 4000
Worktable Size Length [mm] 2500 (select length in sections of 1000mm)
Working Area Worktable Travel (X-Axis) [mm] Worktable length + stroke of 300-500mm
Working Area Headstock Travel (Y-Axis) [mm] 2400 2800 3200 3700 4200 4800 5300
Working Area Ram Travel (Z-Axis) [mm] 1000 1000 1000 1000 1250 1250 1250
Working Area Crossbeam Travel (W-Axis) (for GMH21 series only) [mm] 1500 2000 2000 2000 2500 2500 2500
Distance Between Columns [mm] 1800 2200 2600 3100 3600 4100 4600
Spindle Nose to Worktable Surface [mm] 200
Ram Cross Section [mm] 400×380 400×380 400×380 400×380 500×500 500×500 500×500
Max. Load Capacity of Worktable [t/m²] 2 5 5 8 8 8 10
Feed Rate X-Axis [mm/min] 5-6000
Feed Rate Y-Axis [mm/min] 5-6000
Feed Rate Z-Axis [mm/min] 5-4000
Spindle Taper [mm] BT50
Spindle Speed [mm/min] 2-6000 2-6000 2-6000 2-6000 2-4000 2-4000 2-4000
Spindle Power [kw] 30 30 37 37 37 60 60
Applicable Workpieces Fixed gantry boring and milling machines are more suitable for processing large, heavy workpieces, especially long or wide parts.
Machining Accuracy Due to their high rigidity and stability, fixed gantry boring and milling machines can maintain high machining accuracy under heavy loads.
Worktable Load Typically, the worktable of a fixed gantry boring and milling machine has a strong load-bearing capacity, making it suitable for processing heavy workpieces.
Through the flexibility of its CNC system, the machine can easily adjust processing methods and motion trajectories for different workpieces, adapting to various sizes and shapes.
With appropriate tool selection, it can effectively process workpieces of various materials.
Processing parameters such as feed rate, cutting depth, and spindle speed can be adjusted according to the characteristics of different materials.
It can be equipped with an efficient cooling system to reduce the impact of cutting heat on materials and precision.
Automatic Tool Changer (ATC) System These machines are often equipped with an ATC system that can automatically change tools according to different processing needs, reducing manual operations and improving efficiency.
Automatic Measurement and Monitoring System Some high-end models can be equipped with automatic measurement systems for in-process inspection of die parts, allowing real-time adjustment of processing parameters to ensure die accuracy.
Automatic Loading/Unloading System In mass production scenarios, an automatic loading/unloading system can enhance production efficiency and reduce manual intervention.