外文翻译--在干燥和潮湿的条件下研究高速切削的费用以及便于机械制造过程的优化

外文翻译--在干燥和潮湿的条件下研究高速切削的费用以及便于机械制造过程的优化内容摘要：

ream direction. Cutting Conditions Based on I803685 [46] five cutting speeds were used throughout the testing as listed on Table 36. Cutting speeds corresponding to 410 m/min for the coated carbide tools and180 m/min for the uncoated carbide tools were approximately the upper limit of the application range. Since any further increment resulted in very short cutting tool life or premature tool damage soon after the test was started. The turning experiments were carried out under dry and wet cutting conditions at different cutting speeds, while fixing both feed rate at mm/rev and depth of cut at(1mm). Five cutting speeds were selected for the three types of cutting inserts, as listed in Table36. Experimental Procedure of Tool Life Testing A Clausing 1300 lathe with maximum was used f alloy steel SAE4140H work piece, and the turning process was carried out in the way or the turning of the Hot rolled previously described. A Tachometer was used to measure the rotational speed before each single cut occurred on the work piece in order to ensure that the cutting was performed at the exact speed. An optical microscope was used to measure the flank wear of the cutting inserts. The experiment was terminated if either of the two following conditions occurred 1 The maximum flank wear mm and/or。 2 The average flank wear mm. Preliminary experiments were carried out in order to determine the wear limit. It was found that the cutting inserts were worn out regularly on the flank side. Therfore, VB,nax = mm, is chosen to be the wear limit for the tool life. The flank wear was observed and measured at various cutting intervals throughout the experiments. Figure (35) shows flank wear as a function of cutting time for the cemented carbide (KC313) under dry and wet conditions, and includes only three cutting speeds for clarity. Figure 36 presents the flank wear as a function of cutting time for sandwich coated inserts ( KC732) under dry and wet conditions. Figure 37 shows the flank wear as a function of cutting time for TiALN coated cutting inserts (KC5010). Previous figures included three cutting speeds. Clarity of cutting speed curves are presented at the attached appendix for both conditions of machining. The aforementioned figures, present the effect of coolant emulsion in extending the tool life for the KC313, and KC732 cutting inserts。 especially after 3 minutes for KC313, and after 7 minutes for KC732 of cutting. However, the usage of coolant emulsion on KC5010 showed negative influence. Figure 35, and Figure 36 show that at any set of turning conditions, the flank wear increased at a higher rate at dry cutting during the gradual wear stage. Figure 37 shows that at any set of turning conditions, the flmk wear increased at a higher rate at wet cutting during the gradual wear stage. The explanation of this material behavior will be covered in detail thoughout chapter 5 (wear mechanisms of (KC5010) under wet condition). After gradual wear stage the curves look parallel to each other. This shows that flank wear occurs at the same rate under dry and wet cutting conditions. The previous figures show that flank wear curves went through three stages of wear: running in wear stage, gradual wear stage or steady state wear, and followed by rapid, fatal wear. Similar observations were documented by Chubb and Billingham [11], Haron [12]. The following terminologies are used: Initial or running in wear stage: takes place due to the rapid breakdown of the edge, which is shown by the initial high wear rate in the graph of wear against time. Curves 1, 2, and 3 in Figure 36 this stage is decreased as the cutting spee。