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蔡国英 《精密制造与自动化》2011,(3):22-23
分析评价了目前使用的修整渐开线、三角形、直齿花键等形状的两轴联动数控修整器,介绍了研制开发的一种新的数控成型砂轮修整器.详细介绍了采用尖端具有过渡圆弧的金刚石修整器的结构及特点优势.总结出简化成形砂轮修整的编程过程,避免了复杂的数字控制和软件计算分析,同时可以降低修整器的制造成本,可为数控成型磨床砂轮修整方案设计提供参... 相似文献
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外球面轴承的外圈为球形,其球径尺寸公差和球形误差要求较高,必须经过磨削加工才能达到有关标准规定的技术要求.在没有外球面专用磨床的条件下,为了解决外球面磨削问题,我们对3MZ1310型全自动球轴承内圈沟道磨床的砂轮修整器进行改进,将金刚笔杆加长,使其能够在砂轮外径上修整出凹形圆弧,利用机床原有工作原理和电磁无心夹具,采用成型法磨削外球面,效果很好,工作的球径尺寸公差和球形误差均能达到工艺要求,既满足了生产需要,又扩大了机床使用范围,具体方法如下. 相似文献
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成形磨削一般采用金刚石笔来修整所需要的砂轮形状,金刚石笔在安装中的位置误差将影响被磨削的工件的精度。本文对此误差的大小进行了分析。 相似文献
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本文以高硬度铸铁的精密磨削为对象,对立方氮化硼(CBN)砂轮采用金刚石砂轮进行整形,磨料弹性挤压法修锐,获得理想的砂轮精度和磨料出刃高度。装置简单,操作容易,修整后的砂轮可在550~600分钟内保持稳定的磨削效果,表面粗糙度Ra值为0.1μm左右。 相似文献
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成型砂轮数控修整器要求具有两移动轴加一转动轴的三轴联动功能,需要设计相应的数控加工预处理程序。本文首先解决了成型砂轮曲线的光顺处理问题,针对圆弧加工过程中必须保证修整工具始终处于砂轮曲面法向的要求,提出了细分圆弧的可行性解决方法。 相似文献
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电火花修整金刚石微粉砂轮的磨削特性 总被引:4,自引:0,他引:4
地于金属结合剂金刚石微粉砂轮来说,电火花修整法是一种高效的修整方法,本文讨论了电火花后青铜结合剂金刚石微粉砂轮磨削工程陶瓷的磨削力、磨削工件表面粗糙度特性,并同常规磨削法修整进行了比较。 相似文献
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在线电火花修整砂轮磨削技术已有多方面的发展,可获得较好的砂轮表面质量,并且能实现对难加工材料的高质量、高效率加工。文中对国内外相关技术作了介绍,并就存在的问题进行了分析。 相似文献
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提出一种滚刀铲磨用砂轮零编程数控修整方法,分析砂轮修整原理,得到砂轮修整数学模型.在此基础上,给出砂轮修整零编程数控系统总体构成及其控制流程,并在滚刀铲磨车床上进行实际应用. 相似文献
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Abdolhamid Azizi Seyed Mehdi Rezaei Abdolreza Rahimi 《The International Journal of Advanced Manufacturing Technology》2010,47(9-12):1053-1063
A systematic research is conducted to investigate the effect of rotary cup dressing on vitrified cubic boron nitride grinding performance in grinding of nickel-based superalloys. Grinding performance is evaluated mainly in terms of specific grinding energy and radial wheel wear. The number of active grits per unit area and their slope is considered as the two grinding wheel topographical key parameters for studying grinding performance. Cup dressing conditions with various speed ratios and overlap factors were investigated. In each case, the specific grinding energy and the radial wheel wear were experimentally measured, and then the effect of changing dressing parameters on the grinding performance is analyzed. To provide a view on how various parameters influence specific energy and the importance of wheel topography and grit workpiece interaction, a new specific grinding energy model is developed. Inputs to this model are workpiece parameters, grinding process parameters, and, in particular, the grinding wheel topographical parameters. This model is validated by experimental results. The theoretical values considering the complexity of the grinding process reasonably compare with the experimental results. The effect of number of active grits per unit area and their slope on specific grinding energy and then metal removal mechanism is investigated. The results revealed that the number of active grits per unit area has less effect on specific grinding energy than grits slope. 相似文献
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通过合理划分超声振动修整系统,计算出超声振动修整砂轮系统的各个子系统机械阻抗,运用机械阻抗综合法求出系统的共振频率,为实验中寻求系统的谐振点提供了理论依据.并且提出修整瓦的尺寸对系统的谐振频率影响不大,从而简化修整瓦的设计. 相似文献
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Indraneel Biswas A. Senthil Kumar Mustafizur Rahman 《The International Journal of Advanced Manufacturing Technology》2010,50(9-12):931-940
Profile accuracy of components ground with ultra-precision machine tools is primarily dependent on wheel wear. Quantitative analysis of wheel wear is therefore an important aspect for precision grinding with electrolytic in-process dressing (ELID). In this paper, wheel wear is measured from ELID grinding experiments with different dressing and machining parameters. The grinding forces and dressing current characteristics of the experiments are also compared. Based on the results, a benchmark function is defined for wheel wear rate. A relation for identifying insufficient dressing from sufficient dressing for particular machining conditions is also identified. It is found that insufficient dressing produces pitting and/or arcing on the wheel surface, and wheel wear can be linearly correlated to ELID grinding conditions when the wheels are sufficiently dressed. 相似文献
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