In industrial slitting operations, the precision of the slitting knife and the surface condition directly determine the quality of shearing the panels. To extend blade service life, reduce burrs on finished products, and improve production efficiency, operators must strictly adhere to the following blade usage and maintenance standards.

1. Key inspections and clearance adjustments before insert installation
1. Strictly prohibit working with injuries
Before each tool installation, the edge of the blade must be carefully inspected. Ensure the blade has no blunt edges, no notches, and no chipping effects. Any minor defect can be magnified during high-speed operation, leading to workpiece scrap or blade damage.

2. Scientifically adjust blade clearance
Blade gap (Gap) is not static. Operators must strictly adjust the clearance between the upper and lower blades according to the following three core elements:

Thickness of slitted boards

The tensile strength of the material

Physical properties of materials (such as stainless steel, aluminum plates, high-strength steel, etc.)

Note: A reasonable clearance not only ensures a smooth cut surface but also effectively reduces tool friction wear.

2. Inspection of abnormal finished products and wound repair
During slitting production, if shear defects such as excessive burrs, breaks, or tears are found in the finished product, the machine should be stopped immediately and the following steps should be :

Check for knife edge damage: Prioritize checking for sudden wear or chipping on the edge.

Fine-adjust the upper and lower clearances: If the cut remains intact and shows no obvious damage, the problem lies in the gap, and the overlap and transverse clearance of the upper and lower blades need to be readjusted.

3. Blade Grinding Standards: How to Eliminate the "Fatigue Layer"
When the blade shows slight blunts or small notches, precise grinding must be carried out promptly.

Ensure "two degrees": During grinding, a high-precision grinder must be used to absolutely guarantee the parallelism and concentricity of the blade assembly, preventing excessive runout after loading due to uneven grinding.

Scientific calculation of grinding amount: The grinding amount should be determined based on the actual damage depth of the blade edge.

Core Techniques (Eliminate Fatigue Layer):
Usually, after the outer cylindrical blade is ground (i.e., the notch disappears), additional grinding of 0.5mm - 1.0mm must be added. This step is crucial to thoroughly remove the deep metal fatigue layer at the blade, preventing microcracks from hiding and ensuring wear resistance during the next use.

4. The ultimate solution for deep laceration: factory re-application and tempering
After several rounds of grinding, the insert accumulates significant machining stress internally. At this time, the deep strain and internal stress on the blade edge often cannot be released by simple mechanical grinding.