Now in the tool grinding industry, rough machining does not require high cutting edges. Generally, we can choose electric machining or grinding. High processing efficiency, suitable for machining complex tools, such as printed circuit boards with drills, and cutting laminated wood floors with forming mills. Coarse-grain wheels can optionally be ground. Large contact area and high grinding force (300 ~ 400N) can quickly remove excess machining allowance. Fine-grained grinding wheels are used for fine machining. Small contact area, low grinding force (100 ~ 200N), low grinding amount, but Low material removal rate. This stage is mainly to further improve the quality of the cutting edge by grinding and polishing.
Processing characteristics of PCD and PCBN tools
1. Can realize rough machining with a large allowance
The integrated PCD and PCBN tools can realize large-volume roughing. At this stage, the integrated PCD and PCBN tools can reach a knife depth of 8mm. Which can fill the entire blade, and the production efficiency is doubled.
2.High-speed cutting
Due to the good performance of PCD and PCBN tools, high-speed cutting can completely be realized. And it can perfectly combine with CNC machine tools, which enables highly efficient cutting of workpieces and greatly improves production efficiency.
3. Dry processing
Because PCD and PCBN tools have high hot red hardness, if the coolant is added, the cutting edge is likely to crack due to the sudden temperature drop. Therefore, CBN tools generally use dry cutting when machining workpieces, especially in the case of intermittent cutting. Dry turning is not only environmentally friendly but also saves some costs.
4.Suitable for processing high hardness materials
The hardness of PCD and PCBN tools ranks behind diamond and PCD is an extremely hard tool material that is second only to diamond, so diamond tools are collectively called super-hard tools. Generally works best with PCD hardness greater than 48HRC (PCD wears quickly when processing soft materials). Temperatures up to 2000 ° C are also excellent in redness. Properly tailored PCD tools can withstand the cutting loads of high-power roughing, the impact of intermittent cutting, and the thermal and wear properties required for fine machining.
In general, PCD and PCBN tools are currently the most ideal tool materials for processing ferrous metals. With the application of high-hardness and difficult-to-machine materials in the future, the market share of PCD and PCBN tools will gradually increase. Become the mainstay of the hard material processing industry.
