共查询到19条相似文献，搜索用时 875 毫秒
1.
基于MACRO的非圆二次旋转曲线轮廓的数控加工研究 总被引：2，自引：1，他引：1
针对常规手工编程中难以加工非圆二次旋转曲线的问题,对华中数控系统中典型的非圆二次函数公式曲线轮廓的车削加工进行研究。首先根据加工轮廓确定中心在坐标原点,且不倾斜的曲线方程,在solidworks软件中创建表达式,应用规律曲线参数模块绘制出曲线图形;然后将表达式中的方程进行坐标旋转及平移转换,绘制出与加工图纸一致的曲线轮廓;最后采用分析归纳法得出二次旋转曲线的宏程序模块,并给出该宏程序在旋转双曲线和椭圆曲面零件加工中的编程应用。实践表明,该宏程序对数控编程基础人员灵活应用非圆二次旋转曲线轮廓的编程方法与技巧有实际的指导意义。 相似文献
2.
数控车床加工的零件轮廓,一般由直线、圆弧组成,也有一些非圆曲线轮廓如椭圆抛物线、双曲线等,但都可用直线或圆弧去逼近。 相似文献
3.
文章分析非圆齿轮的结构参数特征,完成了非圆齿轮的3D设计,利用SolidWorks软件建立非圆齿轮的三维模型,并生成STL文件,最后采用3D打印技术打印出非圆齿轮。文章提出的方法与实验为非圆齿轮的智能加工提供了新思路。 相似文献
4.
数控车床加工对象是回转面,对于规则曲线所组成的圆柱面、圆锥面、圆弧面、球面等的加工,只要使用普通程序利用直线插补或圆弧插补指令即可完成。但当出现非圆曲线（椭圆、抛物线、双曲线）构成的回转体时,手工常规编程无能为力,采用软件自动编程又受设备和条件的限制时．则可以采用宏程序来编制。 相似文献
5.
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
6.
陶维利 《泰州职业技术学院学报》2007,7(4):5-7
非圆曲线轮廓是机械零件常见的轮廓要素之一,绝大多数数控机床只具备直线插补和圆弧插补功能。因此,在这些数控机床上加工非圆曲线只能用很多直线段或圆弧段来逼近非圆曲线,其中直线逼近法中的等间距法由于数学处理简单而被编程人员广泛采用。但是对于如何合理地确定间距的大小,很多编程人员往往采用经验法或估算法,结果不是加工精度达不到要求就是节点太多而使加工时间过长。本文从数学的角度详细地介绍了如何根据编程允差合理地确定间距的一种新方法。 相似文献
7.
变速非圆车削关键技术研究 总被引：1，自引：0，他引：1
为了提高非圆车削稳定性，将变速加工引入非圆车削形成变速非圆车削．该文构建了变速非圆车削系统结构，建立了主轴变速定量描述的数学模型和特征参数，设计了适于变速非圆车削的直线伺服单元，研究了变速加工提高加工稳定性的机理．结果表明：在合适的主轴驱动激励函数和变速参数条件下，直线伺服单元能很好地跟踪刀具运动的目标值，从而有效地提高车削稳定性和加工精度． 相似文献
8.
分析了回转体零件非圆曲线的主要位置,研究了不同位置的非圆曲线零件数控加工解决方案,最后,对于非圆曲线零件加工。提出了一种具有普遍意义的解决方案。 相似文献
9.
罗敏峰 《福建工程学院学报》2008,6(1):49-52
探讨非圆齿轮的数控滚齿加工原理、技术和方法,设计一套新型的基于CAN和嵌入式Linux的非圆齿轮滚齿数控机床的构建方法.文章着重介绍基于现场总线的模块化结构通信方式、参数化数据库的设计、误差补偿方法以及基于RTAI的实时解决方案等有关关键技术. 相似文献
10.
该文提出了一种基于FANUCOi数控系统宏程序的双曲线加工方法。通过对双曲线数学方程的分析,利用数控车床实现双曲线轴类零件的加工,降低了对数控机床和数控系统的要求,能很好地保证加工精度。 相似文献
11.
Two kinds of B-basis of the algebraic hyperbolic space 总被引：15，自引：2，他引：15
In this paper, two new kinds of B-basis functions called algebraic hyperbolic (AH) Bezier basis and AH B-Spline basis are presented in the space (?)k=span{1,t,...,tk-3,sinht,cosht}, in which K is an arbitrary integer larger than or equal to 3. They share most optimal properties as those of the Bezier basis and B-Spline basis respectively and can represent exactly some remarkable curves and surfaces such as the hyperbola, catenary, hyperbolic spiral and the hyperbolic paraboloid. The generation of tensor product surfaces of the AH B-Spline basis have two forms: AH B-Spline surface and AH T-Spline surface. 相似文献
12.
Qualitatively different reinforcers and parameters of Herrnstein’s (1970) response-strength equation
Terry W. Belke 《Learning & behavior》1998,26(3):235-242
Previous research that compared the estimated parameters (i.e.,k andR e) from Herrnstein’s (1970) hyperbolic matching law equation within the same individuals responding for qualitatively different consummatory reinforcers (i.e., water and sucrose solution) found similar asymptotic response rates (k). The present study compared these parameters within subjects responding on levers for consummatory and nonconsummatory reinforcers. Male Wistar rats responded on a lever in a running wheel on a series of tandem FR 1 VI schedules for either 0.1 ml of a 15% sucrose solution or the opportunity to run for 15 sec. Herrnstein’s hyperbola was fit to response and reinforcement rates from each session. Results showed thatk values were significantly higher for sucrose than for wheel-running reinforcement. On average,R e was lower for sucrose than for wheel-running reinforcement, though not significantly lower. The results of the present study appear to violate the assumption of the constancy ofk in Herrnstein’s matching law analysis. 相似文献
13.
14.
为了解决DV-HOP算法在节点随机部署环境下定位误差较大的缺点,提出一种基于DV-HOP多通信半径的加权双曲线定位算法RWHDV-HOP。该算法通过理想跳数与实际跳数的差值修正平均跳距,结合多通信半径使跳数小数化,利用基于跳数加权的双曲线算法估算未知节点坐标。仿真结果表明,在相同条件设置下,RWHDV-HOP算法定位精度比传统DV-HOP算法提高了25%,比RWDV-HOP算法提高了10%。因此,基于DV-HOP多通信半径的加权双曲线定位算法RWHDV-HOP在节点随机部署环境下能够较大程度上提高节点定位精度。 相似文献
15.
Calculating the current distribution in circular loop scatterers commonly involves complicated computation. In this paper,
based on the theory of Maxwellian circuits (MC), we propose a fast algorithm by solving a wave equation with constant parameters
corresponding to the circular loop. Our method prodeces similar results compared to the methods using method of moments (MoM)
with lower computational complexity. It is effective when there are parallel multiple circular loop scatterers. Experimental
results show accuracy of the method. 相似文献
16.
Previous research has demonstrated that running in a rotating wheel functions as a reinforcer for leverpressing in rats. In these studies, the pattern of responding was similar to the pattern of responding maintained by consummatory reinforcers, such as food and water. The present study investigated quantitative features of responding maintained by running. In previous experiments in which responses were reinforced according to variable-interval (VI) schedules and food and water served as the reinforcer, the equation for a rectangular hyperbola described the relationship between response rate and reinforcement rate. This experiment tested whether this quantitative regularity also applies to leverpressing maintained by the opportunity to run in a wheel. Fourteen male Wistar rats responded on levers for the opportunity to run. In each session, subjects were exposed to a series of VI schedules. An opportunity to run for 60 sec was the reinforcing consequence. Results showed that response rate was a negatively accelerated function of reinforcement rate, and the relationship between these two variables was described well by the equation for a rectangular hyperbola. To further test the similarity between running and consummatory reinforcers, the response requirement and access were manipulated. In previous experiments with food and water, these types of manipulations differentially changed the two parameters of the hyperbola. A similar pattern of results was obtained with wheel running. Thus, the equation appears to apply to running about as well as it does to consummatory reinforcers. 相似文献
17.
插补技术是机床数控系统的核心技术,逐点比较圆弧插补法是圆弧轮廓的插补算法之一,其算法的优劣直接影响零件圆弧轮廓的加工精度和加工速度。文章在传统的逐点比较圆弧插补算法的基础上,提出以八方向进给取代传统的四方向进给,研究了偏差最小的走步方向的实现方法,同时研究了保证数控机床坐标进给连续的偏差递推计算过程,得出改进后插补算法的流程图。结果表明,新算法可以提高零件轮廓的逼近精度且减少了插补计算次数,从而提高了零件圆弧轮廓的加工精度和加工速度。 相似文献