The surface quality of the tool should be improved before coating
In order to improve the quality of cutting tools and die, often in the tool and die coated with so-called hard coating
. This coating is applied using a physical vapor deposition process (PVD) or by chemical vapor deposition (CVD). With the help of hard coating can improve the durability of the tool or to maximize the cutting speed of the tool. The quality of the coating depends to a large extent on the surface quality of the tool, removing the burr condition and the sharpness of the tool.
Smooth surface reduces the effect of traces
The more smooth the surface of the tool, the flow of chips is more smooth, the lower the temperature rise on the chip. In this way, the tool can also use a higher cutting speed, and significantly improve the durability of the tool. The smooth surface of the tool also reduces the risk of welding with the material to be processed. For tap and squeeze tapes. The required cutting force can be significantly reduced by 40%.
In general, the coating needs to improve the surface roughness characteristic values, so the table is required to polish the surface before coating. If the processing of the DF series polishing machine from Otec's company from Straubenhardt-Feldrennach in Germany, the rugged parts of the surface of the parts Was rounded, thereby reducing the roughness of the part surface, and significantly reduce the residual effect.
Otec uses a new special process to polish chips such as cemented carbide cutters and drills into mirrors. The longer the length of the milling cutter here, the more prominent the advantages of the polished chip flutes.
Residual burrs will exacerbate wear
For high speed steel cutting tools are usually burrs. If the burrs are not removed before the coating, the burrs are easily broken when the tool is first machined. This will appear a section of the gloss without coating. In this part of the tool will certainly soon wear. In the Otec company DF series polishing machine can effectively remove such glitches, remove the burr will not have such a problem.