共查询到19条相似文献,搜索用时 468 毫秒
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I 传动系统原理 新研制的大模数齿轮倒角机与传统倒角机不一样,传统倒角机的指状铣刀的轴线垂直于齿轮轴线,而此倒角机的指状铣刀的轴线与齿轮轴线平行,铣刀沿齿槽的端面轮廓线运动,从而铣出正确的倒角。如图1所示,只要调整铣刀的上下位置和铣刀对齿廓的偏置距离A,就能控制倒角的大小C。因此,使铣刀沿齿廓 相似文献
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为保证齿廓形状数学描述的唯一性、几何不变性和连续性,提出基于弧长坐标的圆弧齿廓表示方法,用分段函数表达公切线型双圆弧齿廓.建立了不同波发生器作用下圆弧齿廓谐波齿轮的装配模型,装配模型中柔轮的轮齿能够反映装配变形后柔轮的真实工作状态.利用坐标变换,通过求解啮合齿对间的相对位置进行啮合仿真,获得装配状态下啮合齿对间的侧隙分布,并依据侧隙进行干涉检查.实例研究表明,公切线型双圆弧齿廓谐波齿轮的啮合区间大,齿间侧隙分布均匀;但柔轮的最大径向变形量的变化对侧隙分布影响很大,甚至会引起齿廓干涉. 相似文献
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修形齿轮在工程中应用很广泛,修形可分为齿廓修形和齿向修形。其加工工艺通常为滚齿(滚刀为磨前滚刀)加磨齿。修形齿轮齿廓上通常带有修缘和挖根,渐开线长度与非修形齿轮不同,因此其端面重合度的计算方法也有所不同。通过探讨齿廓修形齿轮,研究了其端面重合度的计算方法。该方法基于Auto CAD二次开发,使用编制的VB程序实现。主要步骤分三步:首先,根据滚刀参数采用范成法原理仿真滚齿加工,得到粗加工齿形;其次,依据留磨余量计算出磨齿后渐开线,利用布尔运算得到磨齿后齿形;最后求出渐开线起始点、终止点及配对齿轮的有效渐开线起始点和终止点,并计算出端面重合度。最后与德国齿轮强度计算软件ST-Plus计算出的结果做对比,证明该方法的正确性。 相似文献
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加工SG—71型蜗杆减少磨削余量的方法 总被引:1,自引:0,他引:1
一、减少磨削余量的方法SG—71型蜗杆又称平面二次包络弧面蜗杆,它是以平面作为刀具齿轮的母面,使刀具与蜗杆组成如滚齿机相似的传动链,即刀具每转过一齿,相应地使蜗杆转过一周,见图1。这种展成运动可加工成弧面蜗杆。如果采用端面砂轮作为刀具齿轮的母面,可以磨削成为合乎理论齿廓的弧面蜗杆.但在磨削蜗杆之前,需先用直线刃的切刀进行粗加工,将切刀安装在滚齿机的工作台上,而将被粗加工的蜗杆安装在装滚刀的刀杆轴上,按上述传动链进行展成运动。由于切刀刃口是一条直线而不是一个平面,因此粗加工后形成的轨迹面与理论要求的包络面之间有较大的差异,造成余量必须留得较多而且也不均匀。如果过切削刃作一直 相似文献
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基于成形原理加工齿轮廓形的盘铣刀是生产大型风电传动齿轮的必备刀具。然而,受加工原理误差影响,传统齿轮盘铣刀只能针对特定模数和齿数齿轮进行加工,刀具通用性差。传统刀具廓形不能够保证被加工齿轮的加工精度与使用寿命,无法最大程度发挥成形铣削的原理优势。基于此建立了齿轮渐开线实际廓形曲线数学模型,分析了共轭齿条顶角相对运动轨迹,建立了齿根过渡曲线方程,依据齿根过渡圆弧空间相对位置,重构了不同形式齿廓曲线的设计方式;基于逆向投影法,以被加工齿轮的各项参数为变量,建立了刀片刃形曲线数学模型,根据刀片空间包络原理,重构了可转位齿轮盘铣刀廓形曲线设计方式;进行了齿轮齿廓及刀片刃形曲线数值分析,研究了大型风电传动齿轮齿廓曲线以及可转位齿轮盘铣刀刀片刃形曲线的主要形式,研究结果为大型齿轮廓形成型加工提供技术支持。 相似文献
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Xiao-zhong Deng Geng-geng Li Bing-yang Wei Jing Deng 《The International Journal of Advanced Manufacturing Technology》2014,71(5-8):1049-1057
In order to solve some common problems of CNC-machined spiral bevel gears such as small cutting strip width and poor surface quality, while milled by the ball-end, a machining method of face milling using a disk cutter with a concave end is presented. The research theories are based on the foundation of spiral bevel gears’ geometry structure. Firstly, a bigger diameter disk cutter with a concave end is selected. Then, change the setting order of cutter orientation angles. The functions of cutter tilt and yaw angle are separated, and tooth surfaces machined with big cutting strip width and no bottom land gouge can be expected. Since the cutter yaw angle, determined firstly by cutting contact point, positions in the tooth surface machine, the bottom land gouge interference can be avoided effectively. Then, the tilt angles of the gear pair, both side tooth surfaces, are determined by the theory of sculptured surfaces machined by the flat-end cutter, respectively. As a result, the improved cutting strip width and machining efficiency can be realized. Finally, feasibility of this method is verified through machining experiment and measurement of a spiral bevel gear pair. 相似文献
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针对阿基米德滚刀加工渐开线圆柱齿轮,用阿基米德造型的滚刀在刃磨滚刀齿形时,为了提高齿形精度,改变加工工艺和检测工艺,使用先进的"砂轮修正器"和"齿轮测量中心",缩短了设计和加工时间,提高了齿轮滚刀齿形磨制的效率,保证了滚刀加工渐开线圆柱齿轮齿形精度,使大于4模数的阿基米德滚刀齿形(A级﹑AA级)易于保证被加工渐开线圆柱齿轮的齿形精度。 相似文献
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根据被铣插齿刀的模数和压力角选择代用滚刀齿形,由齿厚变化量(歪变量)的大小来决定加工余量,解决了插齿刀加工费用高、周期长的问题。 相似文献
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JianGang Li XuTang Wu ShiMin Mao 《The International Journal of Advanced Manufacturing Technology》2007,33(11-12):1098-1105
A simple and accurate numerical method was proposed for calculating the tooth profile of a noncircular gear. This method is directly based on the real gear shaping process, rather than deducing and solving complicated meshing equations used in the traditional method. The tooth profile is gradually obtained from the boundary produced by continuously plotting the cutter profile on the gear transverse plane. The key point of the method is picking up the graph boundaries. The relative position of the cutter profile on the gear transverse plane is determined by the given pitch line of the noncircular gear, parameters of the shaper cutter, and the shaping process data. In comparison with the traditional method, it is universal and is much more efficient and accurate, especially for noncircular gears, which have nontrivial pitch lines. Special problems in gear design and manufacturing, such as tooth pointing, undercut, and fillet interference, are included in the process. As an application example of the numerical method, a square internal gear is chosen from a new type of hydraulic motor with noncircular planetary gears, and the tooth profile of that gear is computed. The gear is successfully machined by electromagnetic discharge (EMD) using the resulting data. 相似文献