木材加工におけるCrN系コーティング刃物による消費電力の削減効果

摘要

We have commercialized a wide variety of products that use our PVD coating technology, and these products can achieve a longer lifetime and better cutting quality compared with uncoated tools. In this research, we measured not only the edge wear and lifetime of tools but also power consumption to demonstrate the effects of our coating technology in planing on a moulder machine and a CNC machine for timber construction. The planer knives and carbide inserts were coated with CrN based multilayer coatings. We have found that the coated HSS planer knives have the tool life 4 times longer than that of uncoated knives, and reduce power consumption of the spindle by 20%. It was also found that the coated carbide inserts had twice the lifetime than that of TiN coated inserts in joints machining for timber construction. A big advantage was that the feed speed of the tool controlled by a cutting load did not slow down because the cutting power required by the coated tool was 50% lower than that of the TiN coated tool. It was concluded that reducing the environmental impact could be possible as well as a longer lifetime and a good cutting quality by using tools with our advanced PVD coating.%木材加工用機械の分野において，高速度工具鋼や超硬合金，及びそれらに硬質皮膜がコーティングされた刃物が用いられている。PVD法によるCrN皮膜をコーティングした刃物は，木材加工における優れた耐摩耗性と耐食性により，当社によって実用化されている（第1図）。また，CrN皮膜の木材及び木質系材料の切削性能に関する研究報告も多く存在する。