共查询到20条相似文献,搜索用时 125 毫秒
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我厂自行设计的 3M 1322型与 3M1428型切入式球轴承滚道磨床,可以用来磨削球轴承和“四点接蚀式”球轴承*的滚道。该机床是用成型砂轮切入法进行加工的,可加工“S”级的球轴承滚道。加工“四点接触式”球轴承的滚道时,砂轮修整器应将成型砂轮的母线修整为“对称的甲圆弧曲线”,如图1a所示,在加工一般的球轴承滚道时,成形砂轮的母线应修整为圆弧曲线,如图1b所示。在缺乏资料的情况下,我厂发挥了自力更生、奋发图强的革命精神,设计了用液压传动的成形砂轮修整器。通过该机床的试造和试验,证明这个装置的性能良好,能够正确地修整出上述曲线的… 相似文献
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多功能砂轮修整器的设计与应用 总被引:1,自引:0,他引:1
1 引言在精密零件的磨削加工中 ,圆弧形面的磨削尤其是轴承外环内滚道和内环外滚道的磨削是一个技术难点 ,而砂轮的修整对磨削精度起着重要作用。传统的砂轮修整是通过砂轮修整笔进行手工修整 ,或者采用成型修整器 (如滚轮 )进行修整。但这两种方法修整后的砂轮都会产生圆弧形状误差 ,影响加工后工件的形状精度。影响砂轮修整精度的原因有两方面 :一是修整器本身的精度 ;二是操作不当。如在使用砂轮修整笔手工修整砂轮时 ,若工人操作不当 ,使修整器与过砂轮中心线的水平面偏离 ,则在修整笔尖A处 ,修整笔的运动轨迹在水平面内为圆弧曲线 2 … 相似文献
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王兆吉 《机械工人(冷加工)》1988,(4)
我们利用M2110内圆磨床改造成一台螺纹磨床,而双圆弧砂轮修整器是改造成螺纹磨床的关键件。双圆弧砂轮修整器可修整一个圆心的圆弧,也可修整各种偏心距的双圆弧,可广泛加工各种规格的滚珠丝杆及循环球螺纹滚道。该修整器结构紧凑,自动化程度高,使用范围广,大大提高了生产率。 相似文献
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推力圆锥滚子轴承的座圈滚道是带挡边的大锥角锥面,其磨削方法有两种:第一,切入磨削法,采用M250A内圆磨床时,只需改制一个砂轮修整器,将砂轮工作端面修整为微凹形,控制砂轮工作端面和滚道的里,外端圆周速度及其速度差值,即可获得一定度的座圈滚道。第二,横向往复磨削法。 相似文献
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借鉴V形滚道的成形砂轮磨削法,对某型轴承的直交叉滚道也采用成形砂轮切入磨削,分析选用双金刚笔砂轮修整器的优势,实例说明了双金钢笔修整砂轮的数控程序。 相似文献
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四点接触球轴承桃形沟道在切入式磨床上,通过调整砂轮修整器与砂轮的相对位置改变砂轮圆弧偏心量,形成桃形一次切入磨削成桃形沟道。 相似文献
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M250磨床砂轮双曲线修整器能够保证圆柱滚子轴承外圈滚道在终加工后的滚道凸度的技术要求。该修整器结构简单,操作方便。 相似文献
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Jing Wei Qi Zhang ZheZhu Xu SungKi Lyu 《International Journal of Precision Engineering and Manufacturing》2010,11(5):651-658
With increasing demands for high-speed and high-precision machining technology, CBN shape grinding is an effective means in
the field of precision machining for screw rotors. Aiming at the high precision machining of screw rotors, a mathematical
model for the axial profiles of the CBN wheel for machining screw rotors is developed based on theory of gear engagement.
Small electroplated CBN wheel is firstly used to grinding screw rotors. Taking the backlash of screw rotors and the coating
thickness of CBN layer into consideration, the modification of the base body of the wheel shape is introduced into the design
of CBN wheel. For reducing the tooth profile errors of screw rotors induced by mounting errors and wears of CBN wheel, a mathematical
model of the error analyses is established and the influence curves of the profile errors affected by mounting errors and
radius error of grinding wheel are proposed. The electroplated CBN wheels for the screw rotors are made to verify the validity
and effectiveness of the presented method and the machining experiments were performed. Results of this study reveals that
the method proposed in this paper can be used as the precision grinding of screw rotors. 相似文献
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因受到激光高斯光束特性的影响,辐照在砂轮表面上的光斑大小和激光能量都跟随修整路径变化,难以实现高精度的弧形金刚石砂轮的修整,为此,提出采用激光粗修整和电火花精修整的复合修整方法。先用激光修整高效去除多余磨料层来得到弧形轮廓,再用一高精度弧形电极匹配该轮廓进行电火花修整,得到较高精度的弧形砂轮。在粒度为120的金刚石砂轮上试验修整半径为13 mm的弧形轮廓,最终修整出的弧形轮廓半径为13.006 mm,轮廓误差PV值为10.90 μm。最后,通过磨削氧化铝陶瓷验证了砂轮修整效果。检测磨削工件的弧形轮廓拟合半径为13.012 mm,轮廓误差PV值为11.33 μm。 相似文献
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MB1632端面外圆磨床随机配套液压仿形成型砂轮修整器,其修整的成型砂轮只能磨削由一档外圆和端面构成的轴端,极大地限制了机床的加工范围。为适应G427凸轮轴设计改进的需要,对原修整器进行了改进,从而使该机床能一次磨削由多段直线、圆弧曲线构成的复杂型面。若更换靠模,可加工各种复杂的导型面。 相似文献
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Hong-Tsu Young Der-Jen Chen 《The International Journal of Advanced Manufacturing Technology》2006,27(9-10):883-888
Improving the dressing accuracy and efficiency of profile grinding wheels has been increasingly demanded. The significance is addressed in the practical application of precision engineering. In this study, an online dressing system of profile grinding wheels is introduced. A special feature of the system is the application of the non-contact image measuring method used to evaluate deviation of the grinding wheel’s edge in determining the timing and amount of dressing. Diamond form rollers were selected to generate the profile grinding wheels with steep profile flanks by taking advantage of their high flexibility, short dressing times, and low wear rate. A series of grinding and dressing tests were carried out to investigate the dressing accuracy and surface quality for the profile grinding wheels with the proposed system. Through repeated experimental investigations, it was found that the dressing force is a key parameter in determining the number of passes needed in achieving high efficiency dressing. This is to assure that the length of the dressing time, and waste of the dresser and grinding wheel can be minimized. Other main dressing conditions that influence the grinding wheel and workpiece roughness include speed ratio, cross feed and roller profile radius. 相似文献
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在建立通用数学模型的基础上,以刀具齿形重磨精度为砂轮修形评价指标,对采用椭圆修形砂轮铲磨阿氏滚刀齿侧面的过程进行了成功的数值模拟,获得了具有工程应用价值的数值计算结果,并讨论了不同的砂轮修形误差曲线对滚刀齿形重磨精度的影响。由此可以看出,通过调整砂轮修形参数。合理控制修形误差取向以进行优化修形,能够大大提高刀具齿形重磨精度,从而为实际的砂轮修形现场操作提供理论指导。 相似文献
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ZK蜗杆磨削中砂轮廓形的智能化修整 总被引:1,自引:0,他引:1
提出了包含多个砂轮修整参数的锥面砂轮数学模型,推导出了基于该砂轮模型的ZK蜗杆齿面方程。在此基础上,讨论了数学模型中修整参数对砂轮廓形的影响规律,提出了ZK蜗杆磨削过程中砂轮的智能化修整原理,实现了根据砂轮半径的变化对砂轮廓形进行高精度、实时地自动修整。 相似文献