共查询到20条相似文献，搜索用时 453 毫秒
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A unity transformation model (UTM) was presented for flexible NC machining of spiral bevel gears and hypoid gears. The model can support various machining methods for Gleason spiral bevel gears and hypoid gears, including generation machining and formation machining for wheel or pinion on a universal five-axis machining center, and then directly produce NC codes for the selected machining method. Wheel machining and pinion machining under UTM were simulated in Vericut 6.0 and tested on a five-axis machining... 相似文献
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Yao-bin Zhuo Xue-yan Xiang Xiao-jun Zhou Hao-liang Lv Guo-yang Teng 《浙江大学学报(A卷英文版)》2017,18(5):377-392
In this paper, we present a method for the global optimization of the tooth contact pattern and transmission error of spiral bevel and hypoid gears, which includes three optimization objectives, three control parameters, and a complex-constrain genetic algorithm solving method. A new set of fundamental equations for pitch cone parameters of hypoid gear drives are established, as well as the relationships between pitch cone and curvature parameters. Based on this theory, three control parameters are selected to determine the pinion tooth surface. A hypoid gear drive is chosen for case studies. The results verify that the optimization methodology can achieve the expected optimization objectives and has good convergence. Correlations between optimization objectives and control parameters are discussed. Furthermore, a finite element model of a simplified hypoid gear drive system is established and its quasi-static meshing characteristics analyzed. The results again confirm the correctness of the optimization method. The effects of torque load on the contact pattern and transmission error are discussed. The results provide a theoretical reference for geometric calculations, quasi-static analysis, and optimal design of spiral bevel and hypoid gears. 相似文献
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根据成形法铣削螺旋锥齿轮切齿原理,推导出螺旋锥齿轮齿槽曲面的一元四次方程,通过求解一元四次方程得到齿槽上的关键点,为在Delphi＋ OpenGL环境下,利用所求得的关键点完成齿坯模型的建立以及仿真铣削过程的建立提供数据点.本文对比了在Delphi和Matlab下求解一元四次方程的不同,验证了本文算法的正确性. 相似文献
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A virtual computerized numerical control C CNC） processing system is built for spiral bevel and hypoid gears. The pre-designed process of the solution to locate the way of realization is investigated. A kind of combined programming method and principle of solid modeling are chosen. Multienvironmental programming thought and the inter-connected mechanisms between different environments are applied in the proposed system. The problems of data exchange and compatibility of modules are settled. Environment of the system is founded with object oriented programming thought. AutoCAD is located as the graphic environment. Matlab is used for editing the computation module. Virtual C ＋＋6.0 is the realization environment of the main module. Windows is the platform for realizing the multi-environmental method. Through establishing the virtual system based windows message handling mechanism and the component object model, the application of multienvironmental programming is realized in the manufacture system simulation. The virtual gear product can be achieved in the accomplished software. 相似文献
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尽管非圆齿轮的种类多、形状复杂,给制造加工带来了一定的难度,但由于非圆齿轮独特的传动特性,促使人们在加工非圆齿轮方面作了不少的研究和探索.在对非圆齿轮数控滚切加工所需的控制运动进行分析计算后建立其联动基本数学模型,提出了在通用性较强的四轴联动立式加工中心上滚切非圆齿轮的实施方法,该加工方法不仅可以实现高效的滚切加工,而且不必购买通用性较差的专用机床. 相似文献
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We focused on the mathematical modeling and characteristics analysis for the nutation drive based on error parameters. The crown gear tooth profile equation was introduced according to the national standard double circular arc tooth profile and based on the equal tooth strength principle. The nutation drive meshing coordinate system was set up by introducing the cone vertex error, tilt error, nutation angle error and spiral angle error. The tooth profile equations of the double circular arc external and internal spiral bevel gears were further obtained based on the crown gear tooth profile equation concerning above mentioned error parameters. The influences of the nutation gear reducer tooth contact conditions were analyzed with the gear tilt error and axial misalignment error. Finally, the correctness of the theoretical analysis was verified by the contact spot test. 相似文献
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采用平底端刀五轴端铣加工模具曲面时,由于存在干涉和编程困难等问题,而大大影响其应用。对此,基于平底端刀端铣加工模具曲面的特点,将平底端刀五轴端铣加工模具曲面时的平底端刀和被加工曲面看作是一对互为共轭的空间啮合包络曲面,并用微分几何Frenet标架来描述数控加工的刀具轨迹,通过计算得到刀具轨迹的刀位点,从而设计平底端刀五轴端铣加工模具曲面的几何模型。 相似文献
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王鑫 《西安文理学院学报》2011,(3):72-75
针对对数螺旋齿轮精密成形工艺的特点,通过滚齿机、数控滚齿机范成精密加工方法,从而保证了精密加工要求,并运用专用工装设计的原理,介绍了几种对数螺旋齿轮精密加工的工艺措施,保证精密加工精度和任意螺旋角变化规律的要求． 相似文献
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以计算机图形学中的曲线、曲面形成为基础，分析了双圆弧弧齿锥齿轮的齿形网格模型、表面模型的形成过程，为进一步对其进行有限元分析，进行网格划分打下基础。 相似文献
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针对DMC75VLinear五轴高速加工中心和Heidenhain iTNC530数控系统,提出一种后置处理算法,结合M128指令研究了刀具摆角B和工作台转角C的计算公式。利用编写的后置处理软件得到了不同零件的数控程序,已在该五轴加工中心上使用,从而验证了本研究的后置处理算法的正确性和可靠性。 相似文献
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讨论一种改进型的数控机床几何误差参数辨识方法，所有的数学模型在ＸＨ７１４加工中心上得到验证方法适合于三坐标机床如加工中心、坐标测量机等的几何误差参数辨识． 相似文献
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应用计算流体力学软件Flow3D对大型螺旋锥齿轮在淬火过程中的变形情况进行数值模拟,并通过逆向反求和数模比对技术测定实际的热处理变形量,结果表明数值计算与实际测量结果较吻合,数值模拟可以有效地预测热处理后轮齿的变形情况。轮齿的热处理变形具有不均匀性,大端的变形量大于小端的变形量。凸齿面和凹齿面表现出不同的变形趋势,凸齿面主要产生负偏移,凹齿面主要产生正偏移。 相似文献
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In this paper,a special-purpose CAD/CAM software package,BliskCad/Cam,based on a commercial CAD/CAM software Unigraphics is developed to reduce difficulties in CNC-EDM of the shrouded turbine blisks.The software package con- sists of five modules such as electrode design,path searching,and machining simulation module.Functions of BliskCad/Cam include parametrical reconstruction of 3-D model of the blisk,intelligent design of complex shaped electrode,automatic gener- ation of NC codes,search of interference-free tool path for multi-axis NC-EDM and machining simulation,etc.Experimental verification is conducted by using BliskCad/Cam and the results show that it satisfies the requirements,and can realize pre- cision machining and reduce accessorial time remarkably. 相似文献
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杨文明 《深圳信息职业技术学院学报》2007,5(2):78-80
如果在一个指定XY平面进行加工的程序,经过指定旋转中心、旋转轴方向和角位移进行三维坐标变换,则可在任意的一个理想平面上进行加工。这对于用数控铣加工中心机床进行的三维加工编程非常有用。 相似文献
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杨绍荣 《金华职业技术学院学报》2007,7(6):7-10
在多年使用H1-003铣齿机的基础上,发现其存在的一些不足,通过分析铣齿机的工作原理,提出数控化改造设计的原理、思路和方法,成功地实现了对该铣齿机的数控化改造。经加工试验表明,改造后的铣齿机扩大了加工范围,增强了刚性,大大提高了机床性能,具有很高的性价比和实用性。 相似文献
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对数控编程计算机碰撞仿真加工进行分析和研究:通过在UG NX中进行二次开发,探讨了在UG NX中开发数控机床切削仿真加工环境的方法,并以DMU 70cV万能数控铣五轴联动加工中心为例,详细介绍了在UG NX中对特殊结构的数控机床的切削仿真加工环境进行开发的方法,开发了DMU 70eV在UG NX中的碰撞仿真加工环境。 相似文献
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通过分析五轴联动数控加工机床结构，建立了五轴数控加工机床模型。根据刀位文件(刀心坐标和刀轴矢量)，利用坐标变换原理，推导出了坐标变换公式，得到了机床角度分配和刀心在机床坐标系中的位置，从而为从刀具轨迹到数控代码生成提供了方法。 相似文献