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The High-Precision CNC H-Beam Milling Machine represents the pinnacle of structural steel finishing technology, engineered to deliver exceptional surface accuracy and dimensional control for H-beam components in critical applications. This specialized milling system addresses the limitations of conventional machining centers by providing dedicated processing capabilities for large structural profiles requiring precise mating surfaces, slots, and custom contours.
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BM55/6
The BM55/6 is a dedicated CNC milling machine for structural steel finishing, delivering ±0.02mm positioning accuracy—critical for high-load H-beam connections. It integrates dual-spindle technology and programmable tool changers, cutting processing time by 60% vs. traditional methods. Ideal for skyscrapers, bridges, and heavy machinery frames requiring precise mating surfaces and slots.
The machine features two independent 15 kW spindles capable of simultaneous operation on different beam surfaces. Each spindle accepts ISO 50 tooling with diameters from φ12mm to φ60mm, supporting face milling, slotting, and contouring operations in a single setup. Spindle speeds range from 300 to 8000 rpm with stepless adjustment, allowing optimal cutting parameters for different steel grades.
High-precision ball screws and linear guideways on all axes deliver ±0.02mm positioning accuracy and 0.01mm repeatability across the entire working envelope. The X-axis travel of 6000mm accommodates standard H-beam lengths, while Y and Z axes provide 800mm and 600mm of travel respectively, enabling access to all beam surfaces without repositioning.
A one-piece cast iron machine bed with reinforced ribbing weighs over 25 tons, providing the rigidity required to prevent vibration during heavy milling operations. The H-beam clamping system uses hydraulic vises with 50 kN clamping force at multiple stations, ensuring secure workpiece holding even during aggressive material removal.
The Siemens Sinumerik 840D sl control system manages complex milling sequences with 3D simulation capabilities, allowing operators to verify tool paths before production. The system supports CAD/CAM integration for importing complex contour data, while storing up to 500 machining programs for quick recall. In-process measurement probes automatically compensate for workpiece variations and tool wear.
In skyscraper construction, the machine mills precision mating surfaces on H-beam columns and girders, ensuring tight fits that distribute loads evenly through bolted and welded connections. This precision reduces stress concentrations in critical structural joints.
For highway and railway bridges, the machine processes H-beam and box girder connection surfaces, cambered sections, and bearing pads to exacting tolerances required for long-term structural performance under dynamic loads.
Manufacturers of industrial presses, construction equipment, and material handlers utilize the machine to mill guideways, mounting surfaces, and precision slots in H-beam frames, ensuring proper alignment of moving components.
In power plants and renewable energy facilities, the machine processes H-beam components for turbine foundations, generator frames, and support structures where dimensional accuracy directly impacts equipment performance and safety.
The machine consistently produces surface finishes of Ra 1.6μm on milled surfaces when using carbide finishing tools, eliminating the need for secondary grinding operations in most structural applications. Specialized finishing cycles can achieve Ra 0.8μm for critical mating surfaces.
The machine accommodates H-beams with maximum dimensions of 800mm in height, 300mm in flange width, and 12 meters in length with the standard infeed system. Longer workpieces up to 18 meters can be processed with optional support rollers.
The standard automatic tool changer holds 24 tools, with an optional expansion to 40 tools for complex machining sequences requiring multiple tool diameters and types. Tool change time between spindle positions is 4 seconds.
Yes, the 5-axis contouring capability allows the machine to produce complex 3D shapes including tapered sections, curved surfaces, and custom cutouts. The CNC system supports parametric programming and import of STEP/IGES files for complex geometries.
During full operation, the machine consumes approximately 45 kVA of power. It requires a three-phase 380V AC supply with 60A protection and compressed air at 0.6–0.8MPa for tool changing and chip removal systems.
I. The main purpose
This machine is mainly used in construction, bridge, municipal and other steel structure industries H-beam end wing milling groove, milling end face and web milling arc groove.
III.Main specifications and performance parameters:
1. Longitudinal slide:
(1) Quantity: 1
(2) Longitudinal stroke: 300mm
(3) Drive motor power: 0.37kW
2. Transverse slide table :
(1) Quantity: 1
(2) Lateral stroke: 1050mm
(3) Drive motor power: 0.37kW
3. Milling power head:
(1) Quantity: 2
(2) Milling cutter: Indexable hard alloy blade
(3) Axial adjustment of cone milling cutter: 80mm
(4) Spindle motor power: 15KW×2
(5) Processing range: (as shown in the figure).
H=220~1250mm S= MAX 300mm
B=100~ 600mm
T= 10~ 55mm
R =35mm r =10mm C=40(55)mm
4. Milling column:
(1) Quantity: 2
(2) Vertical movement stroke of the power head: 1300mm
(3) Vertical movement drive motor: 2.2KW×2
(4) Clamp moving range: 100~600mm
Pinch method: hydraulic clamping
5. Milling depth retaining iron:
(1) Quantity: 2
(2) Working stroke: 0~40mm
(3) Drive motor: 0.06KW×2
6. Conveyor roller table:
(1) Length of conveyor roller table outside the machine: 5000mm
(2) External conveying motor power: 1.1kW
(3) The power of the conveying motor in the machine: 0.55kW
7. Dimensions of the host (length×width×height): 7.0×4.0×2.8 m
8. Weight: about 11 t
IV. Catalog of major purchased parts
No. | Name | Brand | Country |
1 | Linear rolling guide pair | HIWIN/CSK | Taiwan, China |
2 | Hydraulic pumps | JUSTMARK | Taiwan, China |
3 | Internal shaft oil pump motor | QUNCE | Taiwan, China |
4 | Solenoid hydraulic valves | ATOS/YUKEN | Italy/Japan |
5 | Programmable Controllers | Mitsubishi | Japan |
6 | Frequency converters | INVT/Inovance | China |
7 | Limit switches | TEND | Taiwan, China |
8 | Touch screen | HMI | Taiwan, China |
Note: The above supporting manufacturers are the company's designated suppliers, in case of, special circumstances can not be supplied, will take the same level of products instead, but the quality standards are not lower than the products supplied by the above suppliers.,
Ⅴ.List of spare parts
No. | Code name | Name | Quantity | Remark |
1 | BM55/12.2-19 | Set screws | 3 | |
2 | BM55/12.2-17 | washer | 4 | |
3 | BM55/12.2-13 | Cylindrical milling cutter (full of blades) | 1 piece of left-hand rotation, 1 piece of right-hand rotation | Includes machine-mounted blades with 50% spare blades |
4 | BM55/12.2-15A | Circular milling cutters (full of blades) | 1 piece left-handed, 1 right-hand turn | |
5 | BM55/12.2-20A | Cone milling cutter (full of blades) | 2 left-handed or 2 right-handed pieces | |
6 | Blade fastening screws | 10 in each size | ||
7 | Special knife fastening wrench | 1 in each size | ||
8 | BM55/12.2-54 | Wrench | 1 | |
9 | BM55/12.2-55 | Handle | 1 | |
10 | JB/GQ0341-89 | Pipe joint 12.5 | 2 | |
11 | ZBJ51002-87 | Hose Clamp 25 | 2 | |
12 | HTD-585-5M | Timing belts | 2 | |
13 | HFH2-P1-3-P-1 | Manometer hose | 1 | |
14 | YN-63-I 10 | Pressure gauge 10MPa | 1 |
VI.Working Environment:
1. Working power supply: three-phase four-wire system 380±10%V 50±1HZ
2. Ambient temperature: 0-40°C
3. Ambient humidity: ≤75%.
The BM55/6 is a dedicated CNC milling machine for structural steel finishing, delivering ±0.02mm positioning accuracy—critical for high-load H-beam connections. It integrates dual-spindle technology and programmable tool changers, cutting processing time by 60% vs. traditional methods. Ideal for skyscrapers, bridges, and heavy machinery frames requiring precise mating surfaces and slots.
The machine features two independent 15 kW spindles capable of simultaneous operation on different beam surfaces. Each spindle accepts ISO 50 tooling with diameters from φ12mm to φ60mm, supporting face milling, slotting, and contouring operations in a single setup. Spindle speeds range from 300 to 8000 rpm with stepless adjustment, allowing optimal cutting parameters for different steel grades.
High-precision ball screws and linear guideways on all axes deliver ±0.02mm positioning accuracy and 0.01mm repeatability across the entire working envelope. The X-axis travel of 6000mm accommodates standard H-beam lengths, while Y and Z axes provide 800mm and 600mm of travel respectively, enabling access to all beam surfaces without repositioning.
A one-piece cast iron machine bed with reinforced ribbing weighs over 25 tons, providing the rigidity required to prevent vibration during heavy milling operations. The H-beam clamping system uses hydraulic vises with 50 kN clamping force at multiple stations, ensuring secure workpiece holding even during aggressive material removal.
The Siemens Sinumerik 840D sl control system manages complex milling sequences with 3D simulation capabilities, allowing operators to verify tool paths before production. The system supports CAD/CAM integration for importing complex contour data, while storing up to 500 machining programs for quick recall. In-process measurement probes automatically compensate for workpiece variations and tool wear.
In skyscraper construction, the machine mills precision mating surfaces on H-beam columns and girders, ensuring tight fits that distribute loads evenly through bolted and welded connections. This precision reduces stress concentrations in critical structural joints.
For highway and railway bridges, the machine processes H-beam and box girder connection surfaces, cambered sections, and bearing pads to exacting tolerances required for long-term structural performance under dynamic loads.
Manufacturers of industrial presses, construction equipment, and material handlers utilize the machine to mill guideways, mounting surfaces, and precision slots in H-beam frames, ensuring proper alignment of moving components.
In power plants and renewable energy facilities, the machine processes H-beam components for turbine foundations, generator frames, and support structures where dimensional accuracy directly impacts equipment performance and safety.
The machine consistently produces surface finishes of Ra 1.6μm on milled surfaces when using carbide finishing tools, eliminating the need for secondary grinding operations in most structural applications. Specialized finishing cycles can achieve Ra 0.8μm for critical mating surfaces.
The machine accommodates H-beams with maximum dimensions of 800mm in height, 300mm in flange width, and 12 meters in length with the standard infeed system. Longer workpieces up to 18 meters can be processed with optional support rollers.
The standard automatic tool changer holds 24 tools, with an optional expansion to 40 tools for complex machining sequences requiring multiple tool diameters and types. Tool change time between spindle positions is 4 seconds.
Yes, the 5-axis contouring capability allows the machine to produce complex 3D shapes including tapered sections, curved surfaces, and custom cutouts. The CNC system supports parametric programming and import of STEP/IGES files for complex geometries.
During full operation, the machine consumes approximately 45 kVA of power. It requires a three-phase 380V AC supply with 60A protection and compressed air at 0.6–0.8MPa for tool changing and chip removal systems.
I. The main purpose
This machine is mainly used in construction, bridge, municipal and other steel structure industries H-beam end wing milling groove, milling end face and web milling arc groove.
III.Main specifications and performance parameters:
1. Longitudinal slide:
(1) Quantity: 1
(2) Longitudinal stroke: 300mm
(3) Drive motor power: 0.37kW
2. Transverse slide table :
(1) Quantity: 1
(2) Lateral stroke: 1050mm
(3) Drive motor power: 0.37kW
3. Milling power head:
(1) Quantity: 2
(2) Milling cutter: Indexable hard alloy blade
(3) Axial adjustment of cone milling cutter: 80mm
(4) Spindle motor power: 15KW×2
(5) Processing range: (as shown in the figure).
H=220~1250mm S= MAX 300mm
B=100~ 600mm
T= 10~ 55mm
R =35mm r =10mm C=40(55)mm
4. Milling column:
(1) Quantity: 2
(2) Vertical movement stroke of the power head: 1300mm
(3) Vertical movement drive motor: 2.2KW×2
(4) Clamp moving range: 100~600mm
Pinch method: hydraulic clamping
5. Milling depth retaining iron:
(1) Quantity: 2
(2) Working stroke: 0~40mm
(3) Drive motor: 0.06KW×2
6. Conveyor roller table:
(1) Length of conveyor roller table outside the machine: 5000mm
(2) External conveying motor power: 1.1kW
(3) The power of the conveying motor in the machine: 0.55kW
7. Dimensions of the host (length×width×height): 7.0×4.0×2.8 m
8. Weight: about 11 t
IV. Catalog of major purchased parts
No. | Name | Brand | Country |
1 | Linear rolling guide pair | HIWIN/CSK | Taiwan, China |
2 | Hydraulic pumps | JUSTMARK | Taiwan, China |
3 | Internal shaft oil pump motor | QUNCE | Taiwan, China |
4 | Solenoid hydraulic valves | ATOS/YUKEN | Italy/Japan |
5 | Programmable Controllers | Mitsubishi | Japan |
6 | Frequency converters | INVT/Inovance | China |
7 | Limit switches | TEND | Taiwan, China |
8 | Touch screen | HMI | Taiwan, China |
Note: The above supporting manufacturers are the company's designated suppliers, in case of, special circumstances can not be supplied, will take the same level of products instead, but the quality standards are not lower than the products supplied by the above suppliers.,
Ⅴ.List of spare parts
No. | Code name | Name | Quantity | Remark |
1 | BM55/12.2-19 | Set screws | 3 | |
2 | BM55/12.2-17 | washer | 4 | |
3 | BM55/12.2-13 | Cylindrical milling cutter (full of blades) | 1 piece of left-hand rotation, 1 piece of right-hand rotation | Includes machine-mounted blades with 50% spare blades |
4 | BM55/12.2-15A | Circular milling cutters (full of blades) | 1 piece left-handed, 1 right-hand turn | |
5 | BM55/12.2-20A | Cone milling cutter (full of blades) | 2 left-handed or 2 right-handed pieces | |
6 | Blade fastening screws | 10 in each size | ||
7 | Special knife fastening wrench | 1 in each size | ||
8 | BM55/12.2-54 | Wrench | 1 | |
9 | BM55/12.2-55 | Handle | 1 | |
10 | JB/GQ0341-89 | Pipe joint 12.5 | 2 | |
11 | ZBJ51002-87 | Hose Clamp 25 | 2 | |
12 | HTD-585-5M | Timing belts | 2 | |
13 | HFH2-P1-3-P-1 | Manometer hose | 1 | |
14 | YN-63-I 10 | Pressure gauge 10MPa | 1 |
VI.Working Environment:
1. Working power supply: three-phase four-wire system 380±10%V 50±1HZ
2. Ambient temperature: 0-40°C
3. Ambient humidity: ≤75%.
