ABSTRACT

Single-point cutting tools were developed adopting a novel technique involving centrifugal casting using scrapped and discarded tools without any compositional adjustments. These tools included single-point cutting tools, drills, milling cutters, etc., and were melted in an induction furnace and cast in a vertical rotating mold. Single-point cutting tools were developed from these cast bars. The cutting ability of these developed tools was compared with that of conventional high-speed steel (HSS) tools that were procured from the market, for cutting of mild steel (A36) workpiece under identical tool geometry and cutting parameters. The cutting ability of the conventional HSS tool and the developed tool was observed to be comparable in terms of tool wear. Further, the surface-finish, force required for cutting and chip-configuration were more or less identical. The performance of the developed tool is comparable with the conventional cast HSS tool within the cutting velocity of 52.77 m/min and yields the most encouraging results, putting these tools at par with those available in the market. Thus, the novel technique adopted is claimed to be a viable method for developing single-point cutting tools without going for stringent methods of compositional adjustments and the costly forging methods for compaction.

摘要

单点切削工具的开发采用了一种新技术，该技术包括使用报废和丢弃的工具进行离心铸造，无需任何成分调整。这些工具包括单点切削工具、钻头、铣刀等，并在感应炉中熔化并在垂直旋转的模具中铸造。单点切削工具是从这些铸棒开发的。这些开发工具的切削能力与从市场上采购的传统高速钢 (HSS) 工具的切削能力进行了比较，用于在相同的工具几何形状和切削参数下切削低碳钢 (A36) 工件。观察到传统高速钢刀具和开发刀具的切削能力在刀具磨损方面具有可比性。此外，表面光洁度，切割所需的力和切屑结构或多或少是相同的。所开发刀具的性能在 52.77 m/min 的切削速度内可与传统铸造高速钢刀具相媲美，并产生了最令人鼓舞的结果，使这些刀具与市场上的刀具相媲美。因此，所采用的新技术据称是一种开发单点切削工具的可行方法，而无需采用严格的成分调整方法和昂贵的压实锻造方法。