共查询到20条相似文献,搜索用时 388 毫秒
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提出了利用外锥面砂轮实现内锥面刃磨钻头的方法,设计了实现该方法的连杆齿轮组合机构。克服了用成型砂轮实现麻花钻的内锥面刃磨时,小直径尺寸的麻花钻无法磨削的缺点,同时又能提高麻花钻的刃磨效率和刃磨质量。 相似文献
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对锥面曲面刃磨问题进行了研究 ,建立了统一的数学模型。计算了椭圆锥面后刀面刃磨钻尖的结构参数 ,分析了锥面机构参数以及刃磨参数对钻尖结构参数的影响。并且对椭圆锥面刃磨与圆锥面刃磨进行了比较。 相似文献
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基于锥面刃磨法的工作原理,设计了麻花钻内锥面刃磨的虚拟样机,并基于LabVIEW开发环境,编制了锥顶距A和偏距e的封闭图,当设定钻头公称直径、半锥角等参数后,即可获得后角和横刃斜角临界值范围内的4、e值及其对应的后角、横刃斜角值,此封闭图适合于内、外锥面刃磨法参数的选取,为高质量后刀面刃磨参数的确定提供了一种简捷高效的方法. 相似文献
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在锥面刃磨法和螺旋面刃磨法的基础上提出了改进的螺旋锥面刃磨法,建立了后刀面方程,并在三维软件中对三种刃磨方法得到的圆周后角进行了比较,证明经过改进的螺旋锥面刃磨法的圆周后角分布进一步改善. 相似文献
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根据钻头锥面刃磨的数学模型,建立了刃磨调整参数与钻头结构参数之间的对应关系,用计算机实现刃磨参数的计算,对比和优化选择,并在终端上进行了锥面刃磨的模拟试验。 相似文献
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针对在加工大导程滚珠螺母时,可能会出现砂轮磨杆与螺母端面发生干涉的问题,从滚珠螺母磨削加工的基本方法出发,依据砂轮回转面与被加工螺母内滚道面包络的接触线是一条空间曲线的原理,建立任意安装角度下砂轮回转曲面的计算模型,并将此计算模型用于解决大导程滚珠螺母加工干涉问题.提出在保证加工时不发生干涉的前提下,选取砂轮最佳安装角和中心间距参数的方法以及在此参数下砂轮廓形的拟合优化方法.该方法计算简单、可以随时根据安装角和中心间距参数值对砂轮廓形进行修整,以保证磨削精度.以某型号大导程滚珠螺母为例,完成在保证不发生干涉的情况下相关工艺参数的选择以及砂轮廓形的优化设计,对结果进行误差分析,验证了方法的有效性. 相似文献
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磨削弧区温度在线监测技术研究 总被引:6,自引:0,他引:6
设计了一种可以在生产现场的强背景干扰下在线监测磨削弧区温度的新方法。并通过实际磨削测温实验及烧伤跟踪实验对该方法的可行性进行了分析。结果表明,该方法简单、实用,可实现磨削温度的在线监测,特别适用于断续式CBN砂轮磨削过程的温度监测。 相似文献
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双导程ZN蜗杆修缘成形磨削研究 总被引:2,自引:0,他引:2
双导程ZN蜗杆(又称法向直廓蜗杆)修缘的精密加工需要研究一种成形磨削方法。传统的蜗杆修缘磨削方法是根据加工经验对砂轮进行手工修形,加工效率低且难以实现高精度的齿形修缘磨削。为此,以ZN蜗杆修缘齿形的成形磨削为目标,在蜗杆法平面引入齿形修缘分析,建立ZN蜗杆修缘齿形的数学模型,依据空间啮合原理计算出蜗杆磨削的成形砂轮截形,并利用数控砂轮修整装置修整砂轮。为验证蜗杆修缘的成形磨削效果,选用实际生产中的某一双导程ZN蜗杆,在自主研制的数控砂轮修整系统和工厂的蜗杆磨床上进行试验,经过对成形磨削砂轮计算、修整和蜗杆磨削,结果表明,磨削蜗杆的修缘量满足预期设计要求,蜗杆齿形精度达到6级。表明该方法可用于双导程ZN蜗杆修缘的高精度成形磨削。 相似文献
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介绍了材料的可切削性的判定方法,通过被加工材料的可切削性分析编码,确定切削用量和刀具角度,为刃磨硬质合金刀具的前期工艺准备提供理论指导。提出一种硬质合金刀片刃磨新方法,即综合运用负刃刃磨法、低应力磨削技术和间断磨削方法;镗削实践证明新刃磨方法可显著延长刀具的工作寿命。 相似文献
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Xun Li 《机械工程学报(英文版)》2014,27(1):86-91
There is less research on vertical sculptured grinding technology. Especially in high vertical surface grinding process with the cup abrasive wheel, the thermal damage is prone to happen and undermine the grinding surface integrity. This problem limits to improve the grinding efficiency and the grinding ratio greatly. Through the analysis of vertical surface grinding process and features in depth, this paper revealed the inherent mechanism of higher grinding temperature in the process of vertical sculptured grinding using the cup wheel. Based on the previous research achievements, the grinding experiments on TC4 (Ti-6A1-4V) and GH4169 are carried out utilizing the self-inhaling internal cooling wheel. The experimental results show that the self-inhaling internal cooling wheel can efficiently reduce the grinding surface temperature. Moreover, the inherent mechanism of reducing the grinding temperature using the internal cooling method is revealed. Meanwhile, under the same grinding conditions, the grinding ratio during the experiments on GH4169 using self-inhaling internal cooling method is about 3 times as high as using conventional external cooling method. And the grinding forces can be reduced by about 20%. This research revealed the inherent mechanism of higher grinding temperature in the process of vertical sculptured grinding using the cup wheel, which provides theoretical basis for the design and application of self-inhaling internal cooling wheel. At the same time, an efficient and non-invasive surface grinding method of TC4 and GH4169 is presented. 相似文献
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阐述钢管外圆砂轮(砂带)磨削装置的原理及应用,结合我国目前钢管外圆磨削工艺的现状,提出了一种由五组磨头组成的外圆砂轮(砂带)磨削方法,这种磨削方法在钢管外圆表面磨削加工的批量生产中,被证明能使钢管外圆磨削效率与磨削质量大大提高。 相似文献
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Chien-Sheng Liu Yu-An Li 《The International Journal of Advanced Manufacturing Technology》2018,99(5-8):1109-1117
In the industrial manufacturing field, machining is a major process. Machining operations involve grinding, drilling, milling, turning, pressing, molding, and so on. Among these operations, grinding is the most precise and complicated process. The surface condition of the grinding wheel plays an important role in grinding performance, and the identification of grinding wheel loading phenomena during the grinding process is critical. Accordingly, this present study describes a measurement method based on the acoustic emission (AE) technique to characterize the loading phenomena of a Si2O3 grinding wheel for the grinding mass production process. The proposed measurement method combines the process-integrated measurement of AE signals, offline digital image processing, and surface roughness measurement of the ground workpieces for the evaluation of grinding wheel loading phenomena. The experimental results show that the proposed measurement method provides a quantitative index from the AE signals to evaluate the grinding wheel loading phenomena online for the grinding mass production process, and this quantitative index is determined via some experiments in advance in the same grinding environment to help the monitoring and controlling of the grinding process. 相似文献