Sawing Troubleshooting Guide: How to Solve Scratches, Tilting, and Broken Teeth?

Q1: Why are there regular scratches on the surface of the sawn workpiece?

A: Regular scratches on the workpiece surface are usually caused by saw blade runout. The main reasons include:

• • Uneven flange or foreign objects: Residual iron chips or unevenness on the flange surface cause the saw blade to wobble after installation.
  Solution: Clean the flange contact surface, check and repair flatness.
• • Saw blade installation skew: The saw blade plane is not perpendicular to the cutting direction.
  Solution: Reinstall the saw blade and correct it using a dial indicator.
• • Guide block wear: The guide block cannot effectively guide the saw blade, causing deflection.
  Solution: Check the wear of the guide block and replace it in time.

Q2: How does improper clamping block gap affect cutting quality?

A: The adjustment of the clamping block gap is crucial; too loose or too tight will cause scratches or deformation:

• Gap too loose: Causes workpiece shaking, resulting in shaking scratches.
• Gap too tight: Squeezes the workpiece, causing material deformation and deformation scratches.

Solution: The clamping block gap must be readjusted to the standard value.

Q3: What are the main causes of workpiece tilting (angled cut)?

A: Workpiece tilting usually involves three aspects: equipment precision, material quality, and parameter settings:

1. Improper saw blade installation: The saw blade plane is not perpendicular to the feeding direction. Clean and reinstall the saw blade.
2. Flange/clamping block precision failure: Inconsistent gaps on both sides pull the saw blade to one side. Repair the flange and adjust the clamping block precision.
3. Deformed/bent material: The material itself is non-standard or shifts during feeding. Choose high-quality standard materials.
4. Unreasonable sawing parameters: Mismatched parameters cause the saw blade to deflect. Select correct cutting parameters based on the material.
5. Equipment lateral caliper wear/misalignment: The caliper cannot guide effectively. Repair the equipment caliper.
6. Insufficient saw blade rigidity: Quality issues with the blade itself or poor grinding precision. Communicate with the manufacturer for improvement.

Q4: What causes frequent chipped or broken teeth on the saw blade?

A: Chipped and broken teeth are serious fault signals. Common causes and countermeasures are as follows:

• 1. Cover screws not locked: Loosening during high-speed rotation causes vibration. → Tighten the screws.
• 2. Blade dulling/improper parameters: Cutting overload puts excessive pressure on the tooth tip. → Replace the saw blade or adjust parameters.
• 3. Specification mismatch/improper installation: Wrong specification selected or installation errors. → Select the correct specification, pay attention to installation details.
• 4. Material not clamped securely: Workpiece loosens or has impurities. → Check the clamping mechanism, strengthen operating skills.
• 5. New saw blade not run-in: Microscopic irregularities cause early chipping. → Strictly execute the run-in procedure (start at 80% and increase gradually).
• 6. Insufficient cooling: Tooth tip temperature exceeds tempering temperature, causing annealing and softening. → Check coolant flow and nozzles.

⚡ Pro Tip:

Before troubleshooting, always check the quality of the material itself (e.g., bends, impurities, oxide scale) and inspect it before feeding. This often solves more than half of the cutting problems.