Analysis of core technical parameters of slitting machines: How does it affect cutting accuracy and efficiency?

The core technical parameters of slitting machines directly affect cutting accuracy and efficiency, and the following is an in-depth analysis of the key parameters and their impacts:

1. Mechanical system parameters

• Radial runout of the cutter shaft (≤0.005mm)

For every 0.001mm increase in runout value, the cutting burr rate may increase by 5%-10%. High-precision bearings (e.g. SKF P4 class) and dynamic balance correction (G1 class) can be controlled within 0.003 mm.

• Rail straightness (±0.01mm/m)

The use of grinding grade roller guides (such as THK SRG series) improves the accuracy of ordinary guides by 50% and reduces the long-term wear rate by 70%.

• Tension control (±1N)

The response time of the servo closed-loop tension system is ≤ 10ms, and the tension fluctuation of thin film materials should be controlled within 2%, otherwise it is easy to produce serpentine bending.

2. Motion control parameters

• Repeatability accuracy (±0.02mm)

When using an absolute encoder (23-bit resolution), the positioning error can be controlled to ±0.005mm. The cumulative error of ordinary stepper motors (1.8° step angle) can reach 0.1mm/m.

• Maximum acceleration (2G)

The acceleration is increased from 0.5G to 2G, and the tool change time can be shortened from 3s to 0.8s, but it needs to be equipped with 2000Hz servo gain adjustment to prevent vibration.

• Synchronization error (≤0.003°)

When driven by two axes, the EtherCAT bus (100Mbps) is 10 times faster than the conventional pulse control synchronization accuracy.

3. Tool parameters

• Edge roughness (Ra≤0.2μm)

Mirror polishing tool life is extended by 3 times, but machining costs are increased by 40%. The coefficient of friction of DLC coating tools can be reduced to less than 0.1.

• Tool angle (30°±0.5°)

An angular deviation of 1° will result in a 15% increase in cutting force and a 20% difference in the crystallinity of PET material sections.

4. Material adaptability parameters

• Dynamic Correction Accuracy (±0.1mm)

CCD visual detection (5000fps) is used to respond 5 times faster than ultrasonic sensors, suitable for 8m/s high-speed slitting.

• Temperature control (±1°C)

When slitting aluminum foil, the heat deformation reaches 0.03mm for every 10°C increase in blade temperature, and a liquid cooling system (flow rate 5L/min) is required.

5. Efficiency key parameters

• Tool change time (≤15s)

The quick-change tool holder (HSK63 interface) is 80% more efficient than the traditional flange tool changer.

• Maximum linear speed (300m/min)

When the speed exceeds 200 m/min, it is equipped with air bearings (stiffness 200 N/μm) to suppress vibration.

Parameter optimization strategy

1. High-precision scenes (such as optical films):

◦ Select a spindle with a radial runout ≤ 0.003 mm

◦ The ambient temperature is controlled at 23±0.5°C

◦ Use active noise cancellation vibration control system

2. High-efficiency scenarios (e.g., packaging materials):

◦ Adopt dual-station rewinding (switching time ≤ 2s)

◦ Equipped with 6kW servo motor (300% overload capacity)

◦ Automatic tool wear compensation (0.001mm per tool compensation)

Data comparison table

Pareto optimization of accuracy and efficiency can be achieved through systematic parameter matching, such as reducing tension control error from 3% to 1%, which can reduce scrap rates by 15%. In actual selection, the parameters need to be dynamically adjusted according to the material properties (modulus, ductility).