共查询到20条相似文献,搜索用时 15 毫秒
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Shijin Zhang Yuqiang Wu Shu Wang 《The International Journal of Advanced Manufacturing Technology》2015,80(9-12):1685-1688
Abrasive water jet (AWJ) now is used as a precision cutting tool. With this tool, dimension tolerance less than 0.1 mm is expected in the cutting process. This dimension tolerance is enough for some applications. However, higher precision is necessary in order to use AWJ in some other applications. To get higher precision in an AWJ cutting process, controlling AWJ beam more accurately is needed, and this further leads to understanding AWJ cutting front more accurately. This paper compared the current cutting front profile exploration methods and then provided a new method to collect AWJ cutting front information accurately. With this new method, a better understanding of the cutting front profile is possible, which further leads to higher precision cutting of AWJ. This paper also demonstrated that the AWJ cutting front profile could be fitted by parabolic curves accurately. 相似文献
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磨料水射流切割工艺参数的实验研究 总被引:12,自引:0,他引:12
磨料水射流切割中影响切割深度的因素很多,各工艺参数的选择和合理搭配对切割结果有很大影响,并且难以用精确的数学模型来描述.以磨料水射流切割混凝土为例,考察了射流压力、进给速度、靶距、磨料流量、磨料粒径和材料性能等工艺参数对最大切割深度的影响.结果表明:(1)切割深度与射流压力呈线性增长关系;(2)在一定范围内切割深度随磨料流量增加而增加,但当磨料流量达到一定值后,切割深度随流量增加反而下降;(3)切割深度随磨料粒径的增加呈先增加后减小的规律,存在一极值点;(4)切割深度随切割速度的增加呈指数衰减;(5)存在一最佳靶距,超过这个界限值时,随着靶距的增大,切割深度急剧减小;(6)混凝土试件抗压强度的抗压强度越大,切割深度越小. 相似文献
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Bostjan Jurisevic Daniel Brissaud Mihael Junkar 《The International Journal of Advanced Manufacturing Technology》2004,24(9-10):733-737
Our main objective in the present work is to develop a methodology and create a system for the abrasive water jet (AWJ) machining process control. In the case of AWJ cutting, besides the cutting head traverse rate, the distance between the mixing tube and the workpiece, designated as the stand-off distance, has a predominant influence on the workpiece quality. The control of the traverse rate is performed by the machine controller. The stand off-distance control during the machining represents a problem because no effective on-line in real-time stand-off distance detection system has been developed yet. The detection of the stand-off distance during cutting enables better AWJ machining process control. order to monitor the stand-off distance, we measure the emitted sound generated during the AWJ straight cut operation and analyse its characteristic attributes. In order to verify the proposed stand-off distance monitoring methods, a set of experiments was carried out. The signal analysis was performed in both time and frequency domain. The obtained results show an evident influence of the stand-off distance on sound emission. Thus, efficient control of the AWJ cutting process through sound detection appears to be viable. 相似文献
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磨料浆体射流切割中添加剂的性能及试验研究 总被引:1,自引:0,他引:1
结合高聚物添加剂的特性,讨论其在磨料射流切割中的作用。研究了使用高聚物添加剂后的切割效果、特点,首次分析了磨料浆体射流中比能耗的变化趋势,并进行了相关试验结果的机理分析。 相似文献
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以理论为基础,应用磨料水射流切割加工时的工艺参数:水射流压力、射流横移速度和磨料流量等实验数据,建立一个模糊控制模型。这个模糊控制模型可以预测在任何给定一组加工参数时,可获得的切割深度。给出磨料水射流切割铝合金实例。 相似文献
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Jun Wang 《Frontiers of Mechanical Engineering in China》2010,5(1):19-32
An experimental study of the depth of cut in multipass abrasive waterjet (AWJ) cutting of alumina ceramics with controlled
nozzle oscillation is presented. It is found that this cutting technique can significantly increase the depth of cut by an
average of 50.8% as compared to single pass cutting without nozzle oscillation under the corresponding cutting conditions
and within the same cutting time. Predictive models for the depth of cut are then developed. The modelling process starts
with single pass cutting using a dimensional analysis technique and the particle erosion theories applied to alumina ceramics,
before progressing to the development of the models for multipass cutting. The models are finally assessed both qualitatively
and quantitatively with experimental data. It is shown that the model predictions are in good agreement with the experimental
data with the average deviations of about 1%. 相似文献
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Van Hung Bui Patrick Gilles Tarek Sultan Guillaume Cohen Walter Rubio 《The International Journal of Advanced Manufacturing Technology》2017,93(5-8):1499-1512
Titanium alloys are widely used in the aeronautical and engineering fields as they show an excellent trade-off between the mass and mechanical properties, but as hard materials, they are difficult to machine using cutting tools. The abrasive water jet affords a good solution to produce titanium parts, especially slim ones. To do so, there is a need to adopt a modelling approach for the depth milled. However, a general methodology that takes into account all the parameters leads to complex models based on a large number of experiments. The present article proposes a depth of cut model combined with a rapid calibration method. The case addressed is that of open rectangular pockets on a Ti-6AL-4V titanium alloy. The approach introduces the machine configuration notion considering that a given machine, pressure level and abrasive impose the abrasive flow rate needed in order to obtain an optimal material removal rate. For a chosen configuration, calibration of the model is performed from a series of elementary passes and just three pocket machining passes. The method is rapid and effective as the accuracy of the models obtained over a number of configurations was to within the order of 5%. 相似文献
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Jun WANG 《Frontiers of Mechanical Engineering》2010,5(1):19
An experimental study of the depth of cut in multipass abrasive waterjet (AWJ) cutting of alumina ceramics with controlled nozzle oscillation is presented. It is found that this cutting technique can significantly increase the depth of cut by an average of 50.8% as compared to single pass cutting without nozzle oscillation under the corresponding cutting conditions and within the same cutting time. Predictive models for the depth of cut are then developed. The modelling process starts with single pass cutting using a dimensional analysis technique and the particle erosion theories applied to alumina ceramics, before progressing to the development of the models for multipass cutting. The models are finally assessed both qualitatively and quantitatively with experimental data. It is shown that the model predictions are in good agreement with the experimental data with the average deviations of about 1%. 相似文献
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This article describes the experimental investigation of abrasive water jet (AWJ) cutting on AA5083-H32 aluminum alloy. In this study, the influence of varying the jet impingement angles and abrasive mesh sizes with different water jet pressures, on the output parameters for the AWJ cutting of the aluminum alloy, was analyzed. The experimental results found that the output parameters, namely, the depth of penetration, top kerf width, kerf taper ratio, surface roughness, and abrasive contaminations, were strongly influenced by the combined effect of oblique jet impingement angles and abrasive mesh sizes on AWJ. Also, it is noticed that oblique jet impingement angles have more influence on the output cutting responses than the normal jet impingement angle, and consequently, each abrasive mesh size has an influence on the different output responses for the AWJ cutting of AA5083-H32. Scanning electron microscope and microhardness tester were used to examine the different cutting regions of the kerf wall surfaces. The Energy-dispersive X-ray spectroscopy analysis was used to confirm the amount of silicon particles embedded in the AWJ cut surfaces. The adequacy checking of the experimental data for the AWJ cutting performance models has been analyzed through the residual plots using the statistical software. 相似文献
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磨料水射流除锈技术仿真研究 总被引:1,自引:0,他引:1
针对钢材的锈蚀广泛存在于工业生产中并造成了很大的经济损失这一问题,从磨料水射流除锈技术角度出发,采用ANSYS/LS-DYNA有限元软件,建立了多粒子侵蚀靶板模型,对多粒子连续冲击靶板过程进行了仿真模拟,分析研究了靶板材料去除机理.为磨料水射流除锈工艺提供了一定的理论基础.通过对各种不同算例进行仿真模拟,得到了不同冲击速度、冲击角度等情况下粒子对目标靶板侵蚀情况,通过对结果进行分析比较,研究了粒子冲击参数对冲蚀过程的影响.研究结果表明,材料侵蚀率随着冲击次数的增加而增加,但是经过一定次数冲击后,目标靶板去除量达到了一种相对稳定的状态.随着冲击角度的增加,侵蚀深度增加但是侵蚀面积减小.随着磨粒直径的增加,侵蚀深度及侵蚀体积均逐渐增加. 相似文献
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Xiaojin Miao Zhengrong Qiang Meiping Wu Lei Song Feng Ye 《The International Journal of Advanced Manufacturing Technology》2018,95(1-4):71-81
A manufacturing system comprises production processes and building services, both of which are supplied by different energy carriers as well as raw materials and water. These resources interact according to complex relationships and are converted into products for sale and waste flows. Holistic resource accounting allows the analyst to consider the dynamic relationships between these components, including the strong interdependence between energy and water, which has been called the energy-water nexus. Exergy analysis is a method that accounts for mass and both the quantity and quality of energy, while allowing analysis on a common basis, and for this reason, it is used increasingly to analyse resource consumption in manufacturing systems; however, it has rarely been used to consider water flows alongside energy and material flows. The main contribution of this paper is the presentation of modelling water flows in terms of exergy in the context of sustainable manufacturing. Using this technique in combination with previously developed exergy-based methods, the result is a truly holistic resource accounting method for factories based on exergy analysis that incorporates water flows. The method is illustrated using a case study of a food factory in which a 4.1% reduction in resource use is shown to be possible by employing anaerobic digester in an effluent water treatment process. The benefits of this technology option would have been underestimated compared to the benefits of waste heat capture if an analysis based on mass and energy balances alone had been used. The scientific value of this paper is the demonstration of the relatively high exergy content of effluent flows, which should therefore be regarded as potentially valuable resources. The analytical method presented is therefore of value to a wide range of industries beyond the food industry. 相似文献
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Predictive depth of jet penetration models for abrasive waterjet cutting of alumina ceramics 总被引:2,自引:0,他引:2
A study of the depth of jet penetration (or depth of cut) in abrasive waterjet (AWJ) cutting of alumina ceramics with controlled nozzle oscillation is presented and discussed. An experimental investigation is carried out first to study the effects of nozzle oscillation at small angles on the depth of cut under different combinations of process parameters. Based on the test conditions, it is found that nozzle oscillation at small angles can improve the depth of cut by as much as 82% if the cutting parameters are correctly selected. Depending on the other cutting parameters in this study, it is found that a high oscillation frequency (10–14 Hz) with a low oscillation angle (4–6°) can maximize the depth of cut. Using a dimensional analysis technique, predictive models for jet penetration when cutting alumina ceramics with and without nozzle oscillation are finally developed and verified. It is found that the model predictions are in good agreement with the experimental results with the average percentage errors of less than 2.5%. 相似文献