As the core actuator of a round tube cutting machine, the electric cylinder replaces traditional pneumatic
and hydraulic drive solutions with a servo direct-drive linear actuator. Through a high-precision ball screw
or synchronous belt drive pair, it converts the rotary motion of the servo motor into linear motion, providing
micron-level precision power output for core processes such as tube clamping, follow-up material support,
cutting head follow-up, and linkage between loading and unloading stations. It is a key hardware support
for achieving full automation, high precision, and high stability in the tube processing process.
In the chuck clamping system of the round tube cutting machine, the electric cylinder, as a closed-loop force
control actuator, can dynamically adjust the clamping force within ±1.0 kg. It automatically matches the
clamping threshold for metal tubes of different diameters and wall thicknesses, preventing deformation
and indentation of thin-walled round tubes due to overload clamping force, and eliminating slippage and
offset when large-diameter, heavy-duty tubes rotate at high speeds. Compared to the open-loop pressure
control of traditional pneumatic cylinders, the fully closed-loop servo control of electric cylinders can stably
control the chuck's repeatability within ±0.02mm. Combined with the front chuck's double-roller clamping
structure, it completely eliminates inertial vibration during high-speed pipe rotation, ensuring the dimension
al and positional tolerances of the cut surface from a hardware perspective.
The follow-up material support mechanism is the core structure for suppressing sagging deformation under
its own weight during long pipe cutting. Utilizing a servo-driven electric cylinder, the follow-up material sup
port device can achieve millisecond-level synchronization with the cutting head's motion axis, dynamically
compensating for the support position during long pipe cutting in real time. This prevents deflection deform
ation caused by excessively long cantilevered sections, controlling the straightness error of large-span pipe
cutting to within 0.05mm/m. The high response speed of the electric cylinder can adapt to cutting feed sp
eeds up to 25000mm/min. In complex processes such as beveling and intersecting line cutting, the material
support point always maintains precise linkage with the cutting position, eliminating serrated defects cause
d by pipe vibration during cutting.
In the height-following system of the cutting head, an electric cylinder replaces the traditional pneumatic fo
llow-up module. Combined with a capacitive height tracking sensor, it achieves real-time constant control
of the distance between the nozzle and the pipe surface within ±0.1mm. Faced with fluctuations in pipe ro
undness deviation and surface deformation, the electric cylinder can dynamically adjust the height within
10ms, avoiding light interruption and machine collisions caused by the cutting head colliding with the pipe.
This ensures the continuous and stable execution of processes such as piercing, progressive piercing, and le
apfrog cutting, maintaining the surface roughness stably within Ra6.3 and achieving high-quality cutting res
ults without secondary grinding.
At the automated loading and unloading station, multiple electric cylinders work together in multi-axis linka
ge with intelligent nesting software to achieve automatic conveying, alignment and unloading of pipes. Rel
ying on the long life and maintenance-free characteristics of electric cylinders, the average fault-free operat
ion time of the equipment can reach more than 15,000 hours. Compared with the hydraulic drive solution,
energy consumption is reduced by 30%, and the inherent defects of traditional drives such as hydraulic oil
leakage and pneumatic air source fluctuation are completely solved. It provides a reliable execution basis
for continuous cutting of zero tail material in three-chuck/four-chuck models and is widely applicable to the
high-precision pipe processing needs of various scenarios such as automotive pipes, oil screen pipes, and h
ardware profiles.
