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针对目前锯片齿尖热处理质量不稳定、生产效率低等问题,将火焰表面淬火技术引入齿尖的热处理工艺中,研究开发出了以燃气为热源的锯片齿尖火焰淬火机床。本机床适用于型钢切割用金属热切(或冷切)圆锯片的锯齿加工或修磨后的热处理,具有自动化程度高、调整方便、运行可靠等特点。为了验证其工艺可行性并为设计和使用提供依据,用计算机模拟计算了锯片齿尖在火焰淬火过程中的温度场变化,确定了典型工况下锯片的最佳转速。结果表明,对特定的机床和锯片,通过调整锯片转速调节淬火工艺最为简便。
In view of the current problems such as the unsteady quality of blade tip heat treatment and the low production efficiency, the flame surface quenching technology is introduced into the tooth tip heat treatment process, and a blade-tip flame quenching machine using gas as a heat source is researched and developed. This machine is applicable to the serrated processing or grinding heat treatment of metal cutting (or cold cutting) metal circular saw blades with high degree of automation, convenient adjustment and reliable operation. In order to verify the feasibility of the process and provide a basis for the design and use, the temperature field of blade tip in flame hardening process was calculated by computer simulation, and the optimal rotational speed of saw blade under typical conditions was determined. The results show that for a particular machine and saw blade, the blade speed is adjusted by adjusting the quenching process is most convenient.