To solve the problem of uneven cutting in general metal cutting with cemented carbide, the core lies in making adjustments from three dimensions: tool selection, processing parameters, and tooling operation. The specific methods are simple and easy to implement:
1. Choose the right cemented carbide cutting tools
Prioritize cemented carbide saw blades/milling cutters with precision-ground cutting edges. Only sharp cutting edges without chipping can reduce cutting resistance; select coatings based on the material to be cut. For example, use TiN coating for processing carbon steel and TiCN coating for processing stainless steel. Coatings can reduce the probability of tool sticking and make the cut more even. At the same time, match the cutting thickness: use fine-tooth tools for thin materials and coarse-tooth tools for thick materials to avoid burrs on the cut caused by "a small horse pulling a big cart".
2. Optimize processing parameters to avoid violent cutting.
Excessively high rotational speed will cause rapid wear of the cutting tool, while excessively low rotational speed will result in insufficient cutting force. Adjustments need to be made according to the tool diameter and material: for example, when a cemented carbide saw blade with a diameter of 100mm is used to process ordinary carbon steel, the rotational speed should be controlled at 2000-3000r/min, and the feed rate should be maintained at 0.1-0.2mm/r. In addition, the single cutting depth should not be too large; cutting in 2-3 shallow passes will result in better切口质量 than one deep cut.
3. Ensure proper fixture fixing and cooling lubrication
Before cutting, make sure to **clamp the workpiece tightly and securely** to avoid wavy cuts caused by workpiece shaking during processing; at the same time, cutting fluid should be added to cool and lubricate the tool and workpiece, reducing high-temperature tool sticking caused by friction. For dry cutting, cemented carbide tools with a lubricating coating can be used.
4. Regularly maintain the cutting tools and regrind them in a timely manner
The cutting edge of cemented carbide tools will become dull after prolonged use. When burrs appear on the cut, regrind the cutting edge promptly and do not continue "working with defects". The cutting performance of the reground tools can be restored to over 80%.4. Regularly maintain the cutting tools and regrind them in a timely manner
The cutting edge of cemented carbide tools will become dull after prolonged use. When burrs appear on the cut, regrind the cutting edge promptly and do not continue "working with defects". The cutting performance of the reground tools can be restored to over 80%.
