【導讀】機床成本由閑置費用，加工費用。當改變切削速度的情況下閑置費用保持不變。從機械數(shù)據(jù)手冊[24]. N和C都是由被使用的材料或者工作條件所決定的常數(shù).,磨損標準和對KC313和KC732使用冷卻液都可以提高工具的使用壽命。液的這種抑制作用和對磨損機構的效果我們把它列入到了第五章。金屬的切削研究主要集中在刀具的磨損、刀具的壽命和磨損機理。通過工廠體系建立磨損標準，基本的刀具磨損開端取決于工廠的產(chǎn)品。使用刀具的類型，向碳素鋼刀具和高速切削刀具。低，直到磨損標準達到以后，干燥條件的‘n’開始大于濕潤條件的‘n’。這證明在整個切削過程中通過使。接下來，圖3-12A描述了KC732材料在干和濕的條件下‘n’與磨損標準之間的關系。損價值隨著‘n’的提高而提高。此外，濕曲線要比干曲線高。以降低‘C’，這說明刀具在濕潤的條件下，刀具的使用壽命比較短。

　　

【正文】 speed at wear criterion. The variation of cost versus cutting speed at different wear criteria (dry ). The variation of cost versus cutting speed at different wear criteria (wet). Figure 316 Cost variation with speed for KC732, (a) The variation of cost versus cutting speed at different wear criteria (dry), (b) The variation of cost versus cutting speed at different wear criteria (wet). The variation of cost versus cutting speed at different wear criteria (dry ). The variation of cost versus cutting speed at different wear criteria (wet). Figure 317 Cost variation with speed for KC732, (a) The variation of cost versus cutting speed at different wear criteria (dry), (b) The variation of cost versus cutting speed at different wear criteria (wet). Cost versus speed at mm wear criterion Cost versus speed at mm wear criterion Figure 318 Cost parison between KC5010 and KC732 at different wear criteria (a) Cost versus speed at mm wear criterion, (b) Cost versus speed at mm wear criterion. Table 310 Comparison between three cutting inserts at the same wear criterion Tool Type Wear criterion (mm) Optimum [Cost/ Speed (m/min)] Dry Wet KC313 47$ / 90 40$/90 KC5010 34$ / 210 36$/210 KC732 29$ / 260 $/360 The variation of cost versus wear criterion at different cutting speeds (dry ). The variation of cost versus cutting speed at different wear criteria (wet). Figure 319 Cost variation with wear criteria for KC313, (a): The variation of cost versus cutting speed at different wear criteria (dry), (b): The variation of cost versus cutting speed at different wear criteria (wet). （ a） The variation of cost versus wear criterion at different cutting speeds (dry ) (b)The variation of cost versus wear criterion at different cutting speeds (wet). Figure 320 Cost variation with wear criteria for KC732, (a): The variation of cost versus cutting speed at different wear criteria (dry), (b): The variation of cost versus cutting speed at different wear criteria (wet). The variation of cost versus wear criterion at different cutting speeds (dry ). The variation of cost versus wear criterion at different cutting speeds (wet). Figure 321 Cost variation with wear criteria for KC5010, (a) The variation of cost versus cutting speed at different wear criteria (dry), (b) The variation of cost versus cutting speed at different wear criteria (wet) Tool life at mm wear criterion for KC313 (dry amp。 wet). (b)Tool life at mm wear criterion of KC732 and KC5010 (dry amp。wet). Figure 322 Tool life parison at wear criterion under dry and wet(a) Tool life at mm wear criterion for KC313 (dry amp。 wet), (b) Tool life at mm wear criterion of KC732 and KC5010 (dry amp。wet). The cutting inserts were retested at cutting speed values within the range of experimental testing speeds under dry and wet machining condition. The results presented are for the cemented carbide uncoated (KC313), cemented carbide coated with TiALN (KC5010), and for the KC732. Figures 323A and 323B show the theoretical and experimental results of machining KC313 at a cutting speed of 100 m/min, and 160 m/min respectively. A good agreement between theoretical and experimental values was noticed indicating the accuracy of Taylor39。s formula in predicting the tool life. Figures 324A and 324B present theoretical and experimental results of machining KC5010, at two different cutting speeds 280 m/min and 390 m/min good agreement between both was noticed. Experimental and theoretical data for the KC732 are presented in Figures 325A, and 325B under 280m/min and 390m/min. In this section result samples were presented and the rest of figures are included in the appendix. Theoretical and experimental results of machining KC313 at 100m/min. Theoretical and experimental results of machining KC313 at 160m/min. Figure 323 Theoretical and experimental results for KC313 under wet and dry cutting at different speeds: (a) Theoretical and experimental results of machining KC313 at 100m/min, (b) Theoretical and experimental results of machining KC313 at 160m/min. Theoretical and experimental results of machining KC5010 at 280m/min. Theoretical and experimental results of machining KC5010 at 390m/min. Figure 324 Theoretical and experimental results for KC5010 under wet and dry cutting at different speeds: (a) Theoretical and experimental results of machining KC5010 at 280m/min, (b) Theoretical and experimental results of machining KC5010 at 390m/min. Theoretical and experimental results of machining KC732 at 280m/min. Theoretical and experimental results of machining KC732 at 390m/min. Figure 325 Theoretical and experimental results for KC732 under wet and dry cutting at different speeds: (a) Theoretical and experimental results of machining KC732 at 280m/min, (b)Theoretical and experimental results of machining KC732 at 390m/min.