40mm Max. Drilling Diameter CNC Metal Punching Machine MQL 360-2
(Dry Cooling) Drill Cooling Unit
Product Usage:
This CNC angle steel punching production line is custom-developed
for the drilling and stamping processes of large-size,
high-strength angle steel specifically used in transmission line
towers. All necessary holes on the angle steel can be
precision-machined on this production line, which offers excellent
hole quality, high positional accuracy, as well as outstanding
production efficiency and advanced automation capabilities.
Main parameters:
| Model | ADM2532 |
| Angle size(mm) | 140*140*10~250*250*32 |
| Max. length of raw material (m) | 14 |
| Marking force(kN) | 1000 |
| No. of character group | 1 |
| No. of character | 18 |
| Character size (mm) | 14*10*19 |
| Range of accurate distance(mm) | 50~220(Stepless) |
| No. of drill on each side | 3(2 groups, 6 in total) |
| No. of blade on each side | 3 |
Taper of drilling spindle | BT40 |
| Max. drilling diameter (mm) | Φ40 |
| Max. Spindle rotation speed(r/min) | 6000 |
| Drill cooling unit | MQL 360-2(Dry cooling) |
| Cooling unit oil storage capacity | 2L |
| Cutting oil | Vegetable oil-based micro cutting oils(2000-25) |
| fuel consumption | 5~50ml/h |
| CNC trolley drive type | AC servo motor,rack and pinion driving |
| Max. feeding speed of angle(m/min) | 40 |
| AB-axis alignment movement drive method | Linear Motion Guide;AC servo motor;Ball screw Secondary driving |
| Max. skateboard travel speed of drilling head(m/min) | 10 |
| Drilling head drive type | Linear Motion Guide;AC servo motor;Ball screw Secondary driving |
| Max. feeding speed of drilling head(m/min) | 14 |
| Feeder trolley arm working method | Vertical lifting type |
| Number of tipping cylinders on discharge side | 4 |
| Hydraulic station cooling method | Air cooling |
| No. of CNC axes | 9 |
| Air pressure(MPa) | 1 |
| Total power | About 150KW |
Product Features:
The cnc angle metal drilling unit is equipped with six sets of CNC
drilling heads, with three sets arranged on each of the two flanges
of the angle steel. For holes of the same diameter and identical
end distance on both flanges of the angle steel, the corresponding
drilling heads on both sides can perform simultaneous drilling
operations. The drilling spindle adopts a Taiwan-sourced BT40
precision spindle (with internal cooling), and the drilling heads
utilize cemented carbide drills. The cutting speed of the drilling
heads reaches up to 200 m/min (in contrast to 25–35 m/min for
conventional high-speed steel twist drills), enabling exceptionally
fast processing.
A servo motor drives the CNC drilling power head for feeding
movements; the rapid feed, working feed, and rapid retraction of
the drill bit are controlled by the CNC system and executed
automatically. The retraction position of the drill bit can be set
via the host computer, which reduces idle strokes and further
enhances production efficiency. The manufactured holes feature a
diameter tolerance of less than 0.1 mm and a surface finish (Ra) of
less than 6.3 μm, ensuring high hole processing quality.
(1)The spindle motor of the drilling unit adopts a high-quality
inverter motor, with a maximum spindle speed of up to 6000 r/min.
(2)The drill pipe feeding speed is approximately 40 m/min
(adjustable).
(3)The spindle and other force-bearing components are manufactured
in compliance with standards, undergoing forging, heat treatment,
and non-destructive testing. This ensures sufficient strength,
hardness, and wear resistance, as well as high fatigue strength, to
meet the requirements of long-term feeding and rotational
operations. The spindle is sourced from Taiwan-based brands such as
Jianchun or Danquan.
(4)To guarantee the operational accuracy of the equipment, the
spindle deflection must be less than 1/1000 of the span under all
maximum load conditions.
(5)The spindle feeding distance is equipped with an adjustable
compensation function.
(6)Travel switches are installed at the upper and lower limit
positions of the collinear movement of the drilling unit’s power
head, serving as limit protection devices.
(7)In addition to the limit switch protection installed on the unit
power head, the control system shall also provide soft limit
protection for its limit positions.
These specimens cover a range of common specifications and hole
patterns of angle steel employed in transmission line tower
construction. They allow potential users or inspectors to visually
confirm the equipment’s operational performance, thereby providing
concrete and intuitive references for evaluating whether the
equipment meets the practical production demands of transmission
line tower manufacturing.
In ultra-high voltage (UHV) transmission line construction—where
transmission towers are required to resist extreme weather
conditions and heavy loads—this equipment plays a critical role in
processing angle steel components for the towers’ main load-bearing
frameworks. It efficiently accomplishes drilling and stamping
operations for angle steel used in tower bodies, cross-arms, and
other key structural components, ensuring high dimensional
precision and reliable connection performance. This, in turn,
protects the overall structural stability of the transmission
towers throughout their entire service life cycle.
