共查询到19条相似文献,搜索用时 250 毫秒
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介绍了纯水喷雾冷却技术在金属切削加工中的应用。纯水喷雾冷却技术是利用一定压力的压缩空气将纯水雾化后,喷向刀具与工件相互作用的切削区,对切削区进行冷却、润滑和冲洗,能极大改善切削状况和作业环境。与传统的冷却液浇注法相比,纯水喷雾冷却具有经济性好、绿色环保、加工表面质量好、刀具使用寿命长等优点。 相似文献
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切削加工中喷雾冷却的应用 总被引:2,自引:0,他引:2
喷雾冷却是利用一定压力的压缩空气使微量的切削液雾化,并高速喷向切削区,因而使切削区的切削温度大幅度下降,同时带走切屑和粉尘,改善作业环境,避免造成环境污染.从冷却原理及实际应用效果两方面都说明,喷雾冷却具有较好的切削区冷却作用和推广价值. 相似文献
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近年来的试验结果表明,从切削油中过滤出细小粒子,对金属切削加工有显著的影响。人们曾经认为,纯净的切削油只用于高精度的加工,如珩磨或放电加工。但环保部门和零件公差要求较严的用户都迫使车间在各种切削加工中使用杂质含量低的切削油。这样做能减少维修设备的费用,增加 相似文献
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Sung Jung Heo 《Journal of Mechanical Science and Technology》2008,22(7):1383-1390
Environmentally conscious hard turning and technology has placed more importance on the machining process. In this research,
the possibility of environmentally conscious hard turning of cemented carbides was studied. The effects of cutting methods
of dry and wet (vegetable oil mist, and mineral oil) and work material on cutting resistance and wear characteristics of cutting
tools were experimentally investigated. The turning and micro-cutting process in SEM was carried out by using four kinds of
tungsten carbides with the PCD cutting tools. Specifically, an emphasis was put on the effect of WC and Co additives in four
kinds of cemented carbides on machinability and tool wear characteristics. The tool wear width and the cutting resistances
were measured, and the worn flank was observed. 相似文献
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微量润滑油雾调控及雾粒传输方式直接影响油雾状态的变化,进而影响喷射至切削区域的雾粒特性。基于内置式微量润滑雾化技术和油雾内部传输应用特点,研究了不同微量润滑雾化参数和雾粒传输方式条件下油量调控性能和调控规律,并结合传输管路油雾出口雾粒特征,揭示了油雾传输管路内径和传输行程对雾粒特性的影响规律。研究结果表明,雾化室压差在传输油雾量调控上比进气压力作用显著,需要结合压差和进气压力二者影响来考虑雾化器开启数量以对传输油雾量进行调节,在传输过程中传输管路尺寸与行程是影响油雾雾粒特性的重要因素。 相似文献
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This paper examines the performance of AlN/TiN coated carbide tool during milling of STAVAX® (modified AISI 420 stainless steel) at a low speed of 50 m/min under conventional flood and mist lubrication. Abrasion, chipping, fracture resulting in the formation of crater and catastrophic failure are the wear mechanisms encountered during machining under flood lubrication. The flank wear, and the likeliness of the cutting tool to fracture, chip and fail prematurely increased with an increase in the hardness of the workpiece and a reduction in the helix angle of the tool. Small quantity of mineral oil sprayed in mist form was effective in reducing the flank wear and severity of abrasion wear, and preventing the formation of crater and the occurrence of catastrophic failure. In milling 35 and 55 HRC-STAVAX® using a feed rate of 0.4 mm/tooth and a depth of cut of 0.2 mm under mist lubrication, the cutting edge of the 25° and 40° helix angle tools only suffered small-scale edge chipping and abrasive wear throughout the entire duration of testing. The influence of the ductility of the workpiece on the surface finish and the effectiveness of mist lubricant in improving the surface finish are also discussed. 相似文献
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针对微量润滑技术在金属带锯锯切加工过程中的应用开展相关研究,搭建了带锯条锯齿的超声水雾直喷式润滑系统,进行了干切削、冲刷和超声水雾作用下锯切对比实验。实验结果表明:超声水雾作用下锯切主切削力Fx的均值最小,为干切削时Fx均值的53%、冲刷作用时Fx均值的31%,且切削液消耗量更小,仅为冲刷作用时消耗量的10%。利用显微高速摄像机进行研究与分析,超声水雾作用下微米级切削液液滴在锯齿材料表面会形成微观润湿效应,使得液滴与锯齿材料表面具有更小的润湿角和润湿效果;此外,相比干切削和冲刷作用,超声水雾作用下形成的锯切切屑具有更小的曲率半径,仅为300 μm,这也从另一方面说明了超声水雾液滴对锯齿表面润滑效果较好。 相似文献
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机械加工过程中,金属切削液通过高速旋转的主轴雾化,产生大量油雾颗粒。为研究矿物油特性对机械加工油雾散发的影响,采用一种环境舱实验方法,在不同转速下分别对2种不同物性的切削液在切削过程中产生油雾颗粒的散发率、粒径分布、质量中值直径和索特平均直径进行研究。结果表明:由离心作用产生的油雾颗粒总散发率与主轴转速呈二次方关系;主轴转速越大各个粒径的油雾颗粒散发率越大,但主轴转速对粒径分布、各粒径占比、质量平均直径和索特平均直径的影响不大;黏度越大的切削液,油雾颗粒的散发率、质量平均直径和索特平均直径也越大。 相似文献
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Kai Yang Ying-chun Liang Kang-ning Zheng Qing-shun Bai Wan-qun Chen 《The International Journal of Advanced Manufacturing Technology》2011,52(9-12):905-912
The cutting temperature plays an important role in micro-scale cutting process due to the fact that the dimension of the micro-cutter is small and the value of micro-cutter wear is sensitive to temperature. In this paper, the temperature distribution of the micro-cutter in the micro-end-milling process has been investigated by numerical simulations and experimental approach. Micro-end-milling processes are modeled by the three-dimensional finite element method coupling thermal?Cmechanical effects. The micro-cutter cutting temperature distribution, the effect of various tool edge radii on cutting force, and the effective stress during micro-end-milling of aluminum alloy Al2024-T6 using a tungsten-carbide micro-cutter are investigated on. The simulation results show that with increase of tool edge radius the cutting force increases, while the effective stress and mean cutting temperature decreases slightly. In increasing the tool edge radius, the maximum effective stress and cutting temperature region of the micro-cutter occur from the rake face to the corner on the tool edge and the flank face. The tool edge radius has been found to be the major factor affecting micro-cutter temperature distribution. The experimental verification of the simulation model is carried out on a micro-end-milling process of aluminum alloy 2024-T6 with a high-precision infrared camera. The influence of tool edge radius on cutting temperature distribution was verified in experiments. 相似文献