共查询到19条相似文献,搜索用时 109 毫秒
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钛合金TC4的钻削力试验研究 总被引:1,自引:0,他引:1
钛合金TCA属于较难加工材料,其小孔钻削尤为困难。为得到钻头直径、钻削参数(进给量、切削速度)和刀具材料对钻削力的影响规律,采用标准高速钢钻头对TCA与45钢进行了钻削对比试验,并用多元线性回归分析模型分别建立了扭矩和轴向力的经验公式。结果表明,TC4的钻削力比45钢大,钻削参数对钻削力的影响规律与45钢基本相同,即钻头直径对扭矩和轴向力影响最大,进给量次之,切削速度的影响最小。 相似文献
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采用单因素试验法,利用Third Wave AdvantEdge有限元软件研究麻花钻的钻尖几何参数对钛合金钻削工艺性的影响,运用Power Law本构模型建立Ti6Al4V钛合金材料参数。验证麻花钻参数在合理的取值范围内,Carbide-General硬质合金麻花钻不同的后角、螺旋升角、横刃斜角和刃口钝圆半径对钛合金钻削性能的影响。通过钛合金钻削过程的有限元分析,为麻花钻钻削钛合金材料时的钻头几何参数合理选择提供了参考依据。 相似文献
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The primary objective of this research was to develop relationships which predict tool wear from measured cutting forces. Different cutting speeds and feed rates were examined. The workpiece materials used were a medium-carbon steel and a titanium alloy. A synthetic cutting fluid was used with a 9.525 mm drill and a 6.350 mm drill, for drilling the medium-carbon steel and the titanium alloy, respectively. Preliminary testing was conducted to find the optimal values for cutting speeds and feed rates. The main drilling tests were performed using the cutting conditions resulting from the preliminary tests. Statistical analysis of the results of the main drilling tests showed that the axial force was significant at the 5 per cent level in models for both materials. It also showed that the moment about the vertical axis was significant at the 5 percent and the 15 per cent levels in the models for the titanium alloy and the medium-carbon steel, respectively. The model for the smaller holes drilled into the more homogeneous material, the titanium alloy, was more accurate in predicting tool wear. 相似文献
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In this study, the optimization of the cutting parameters on drill bit temperature in drilling was performed. Al 7075 work piece and the uncoated and Firex® coated carbide drills in the experimental were used. The optimization of the cutting parameters was evaluated by Taguchi method. The control factors were considered as the cutting speed, feed rate and cutting tool. Taguchi method was used to determining the settings of cutting parameters. The L18 orthogonal array was used in experimental planning. The most significant control factors affected on drill bit temperature measurements was obtained by using analysis of variance (ANOVA). Taguchi design method exhibit a good performance in the optimization of cutting parameters on drill bit temperature measurements. In addition, the empirical equations of drill bit temperatures were derived by using regression analysis. The obtained equations results compared with the drill bit temperature measurement results. The empirical equations results indicated a good agreement with experimental results. 相似文献
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这里以难加工材料钛合金为研究对象,针对钛合金材料的加工难点特性,选择目前国内相应的硬质合金材料,并优化组合出不同的钻头几何参数,进行了深孔钻削试验。通过对试验结果进行分析,确定出适合加工钛合金材料的深孔钻用刀片材料和几何参数。 相似文献
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Eyup Bagci Babur Ozcelik 《The International Journal of Advanced Manufacturing Technology》2007,34(9-10):867-877
In the past, many researchers have studied wear developed on drilling tools mainly due to the high temperatures generated which accelerate thermally related wear mechanisms and thereby reducing tool life. This paper deals with an experimental investigation on the effect of an internal coolant approach (for different air pressure) on drill bit temperature, comparing it with an external coolant approach and dry cutting. Drill temperatures were measured by inserting standard thermocouples through the coolant (oil) hole of TiN/TiAlN-coated carbide drills. Experimental studies have been conducted using Al 2014 alloy materials. In the drilling tests, cutting conditions had different spindle speeds, coolant approaches and feed rate values. The settings of drilling parameters were determined by using the Taguchi experimental design method. An orthogonal array, the signal-to-noise (S/N) ratio, and the analysis of variance (ANOVA) were employed to analyse the effect of coolant approaches and drilling parameters. The objective was to establish a model using multiple regression analysis between spindle speed, coolant (air) pressure and feed rate with the drill bit temperature. Mathematical models for drill bit temperature are proposed that agree well with the experiments. 相似文献