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In the modern metal processing industry, cutting steel coils to specific lengths is a fundamental and critical process.
To meet market demands for high productivity and precision, automatic cut to length lines have evolved into highly automated production systems integrating mechanical, electronic, hydraulic, and pneumatic technologies.
The integration of a flying shear system and an automatic stacker is the core element enabling high-speed, continuous production without the need for manual intervention. |
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In traditional shearing processes, the material often requires frequent starts and stops to synchronize with the shear's action; this not only limits production speed but also risks compromising cut-length precision due to mechanical shock.
Automatic cut to length machines equipped with flying shear systems and automatic stackers enable high-speed, high-precision cutting while the material is in continuous motion, followed by the automatic, neat stacking of finished sheets.
The direct value of this configuration is evident in three areas:
The flying shear system operates by using an NC length-setting system to monitor the running speed and length of the steel strip in real-time, driving the shear unit to perform the cutting action while moving in synchronization with the strip.
1. Drive and Synchronization Control
KINGREAL STEEL SLITTER automatic cut to length machines utilize high-performance servo motors to drive the flying shear carriage.
Through closed-loop control, the servo system ensures that the horizontal movement speed of the shear blades matches the linear speed of the steel strip exactly at the moment of contact.
This dynamic shearing prevents material accumulation or stretching in the cutting zone, thereby ensuring cut-length precision is typically maintained within ±0.3mm.
2. Rapid Blade Clearance Adjustment
For metal sheets of varying thicknesses, the precision of the blade clearance directly affects the quality of the cut edge.
This flying shear system features a mechanism for rapid blade gap adjustment, allowing operators to fine-tune the distance between the upper and lower blades based on material type and thickness; this effectively minimizes burr formation and extends blade service life.
3. Cost-Efficiency of Four-Sided Blades
To reduce production costs, the blades used in the shear are typically designed with four usable edges. When one edge becomes worn, there is no need for immediate regrinding; simply rotating the blade exposes a fresh edge for use. This design triples the service interval for a single set of blades, significantly enhancing the automatic cut to length line's overall economic efficiency.
4. Bottom-Up Shearing Mode and Conveyor Belt Protection
Unlike traditional down-cutting shears, the flying shear system in KINGREAL STEEL SLITTER automatic cut to length machine typically employs a bottom-up shearing method.
The logic behind this process is that any minor burrs generated during shearing point upwards; consequently, as the sheets move along the conveyor belt toward the stacking area, the burrs do not scratch or snag the rubber belt. This extends the maintenance interval for the conveyor system and prevents belt debris from contaminating the sheet surface.
The stacker is located at the end of the automatic cut to length machine and is responsible for the orderly collection of finished sheets discharged at high speed.
Stacker performance is critical for materials with stringent surface quality requirements, such as aluminum sheets and color-coated sheets.
1. Pneumatic and Hydraulic Collaborative Mechanism
The stacker integrates pneumatic assistance with a hydraulic lifting system. The pneumatic mechanism drives the end-stop and side-alignment devices, using high-frequency reciprocating motion to precisely position each falling sheet. The hydraulic system manages the smooth operation of the lifting platform, ensuring vertical stability even under heavy loads.
2. Air Cushioning Technology
As sheets are discharged from the end of the conveyor belt and descend, a controlled airflow is continuously blown beneath the stacking area to create an "air cushion" of optimal thickness.
Instead of directly impacting the top of the stack, the sheets float on this air cushion and descend gently. This friction-free descent mode effectively prevents mutual friction and scratching between sheets, thereby protecting the coating and mirror-like finish.
3. Photoelectric Sensor Logic Control
The stacker is equipped with multiple sets of high-precision photoelectric switches to monitor the stack height in real time.
As the number of sheets increases, the lifting platform automatically detects the change and descends by a preset increment, ensuring the vertical distance between the stacking surface and the conveyor plane remains optimal.
This constant-distance stacking method is key to achieving neat, uniform stacks.
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1. Significant Improvement in Operational Efficiency
Traditional start-stop shear cut to length lines are usually limited to a maximum speed of 20–30 m/min, whereas automatic cut to length machines equipped with flying shear systems can operate stably at 80 m/min or higher. For steel service centers, this means processing a higher tonnage of orders within the same timeframe.
2. Ensuring Consistent Sheet Quality
Minimal manual intervention results in fewer human errors. By using PLC-preset parameters, automatic cut to length machines ensure that diagonal and length tolerances remain completely consistent from the first sheet to the thousandth. Such high consistency is crucial for downstream precision processes like stamping and bending, significantly reducing scrap rates.
3. Optimizing Profit Structure
Although the initial investment for an automatic cut to length machine is higher than for manual equipment, the benefits far outweigh the costs:
Material Utilization: NC precision length control reduces scrap at the head and tail ends.
Labor Optimization: One automated line can replace 3–5 traditional operators.
Energy Efficiency: Continuously operating servo-drive systems are more energy-efficient than asynchronous motors that require frequent starting and stopping.
A complete automatic cut to length machine typically comprises the following key modules:
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Hydraulic Decoiler: Supports the steel coil and provides constant-tension uncoiling; equipped with a hold-down arm to prevent coil loosening. Leveler: Uses a staggered multi-roll arrangement to eliminate residual stress and internal curvature from the coil, ensuring sheet flatness. NC Servo Feeder: Converts programmed length data into mechanical displacement for precise feeding control. Flying Shear: Performs synchronized, dynamic cutting. Conveyor System: Transports cut sheets at high speed. Automatic Stacker: Ensures neat and orderly stacking. Electrical Control System: Centralized integrated control based on PLC and HMI, supporting multi-task storage and real-time data monitoring. |
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KINGREAL STEEL SLITTER is dedicated to tailoring high-efficiency automatic cut to length machine solutions for global clients.
By integrating a flying shear system, KINGREAL STEEL SLITTER automatic cut to length lines enable your factory to transition from inefficient, intermittent production to high-speed, continuous-flow operations.
Please contact the KINGREAL STEEL SLITTER team directly for technical specifications, cutting solutions tailored to specific materials, or a customized quote.
We provide more than just automatic cut to length machine; we offer comprehensive metal processing solutions designed to boost your competitive edge in the industry.
