1.Why is regular calibration necessary?
Ensuring Dimensional Accuracy:
Width: Slight variations in the gap and overlap between the slitting discs of the leveling machine can cause the strip width to exceed tolerances after shearing.
Length: Accumulated errors in the encoder or servo system of the fixed-length feeding system can lead to inconsistent lengths of the sheared strips.
Diagonal: Non-parallelism of the equipment or uneven pressure on the feeding rollers can cause the strip to be pulled slanted, resulting in parallelogram-shaped strips instead of rectangles.
Ensuring Strip Shape Quality:
Inaccurate leveling, parallelism, and pressure distribution between the leveling rollers can prevent the strip from being leveled, resulting in defects such as wavy edges, warping, and bends.
Inaccurate tension control systems can cause unstable tension during unwinding and rewinding, leading to surface scratches or poor strip shape.
Protecting Equipment and Preventing Damage:
If the deviation correction system malfunctions, the running steel strip will deviate, causing minor scratches on the edges, severe tearing, or even damage to the equipment structure.
Non-parallelism between roller systems can cause abnormal loads on bearings and transmission systems, accelerating wear and shortening equipment life.
2.What are the corrective contents and effects of the leveling unit?
Calibration content: Levelness and parallelism of the leveling rollers
Increase in pressure of each leveling roller
Wear condition of the leveling rollers
Core quality unit. Directly affects the flatness of the finished steel plate and eliminates internal stress.
3.What are the calibration contents and impacts of a fixed-length shearing system?
Calibration contents: Feed encoder/grating ruler
Servo drive system
Shear blade gap and parallelism
Determines the length accuracy. Inaccurate encoder counting will directly lead to inconsistent cut lengths.
4.What are the recommended calibration cycles?
Usage Frequency: The cycle time is completely different between continuous production (three shifts) and occasional use.
Processed Materials: Processing high-strength, thick materials causes far more impact and wear on the equipment than processing thin, soft materials.
Quality Requirements: The higher the precision requirements for the product, the shorter the calibration interval should be.
5.What are some suggestions for daily/pre-shift checks?
Check the equipment surface for foreign objects.
Check if the air supply and hydraulic station pressure are normal.
Perform a simple test on the safety devices (such as the emergency stop button) to ensure they are effective.