共查询到20条相似文献,搜索用时 904 毫秒
1.
2.
毕文耀 《精密制造与自动化》2013,(3)
分析了薄片工件在磨削加工中的特点,介绍了对薄片工件常用的加工方法。通过对薄片工件磨削措施的改进,成功地实现了对薄片工件的精度控制,总结出在磨削加工薄片工件时应注意的事项,为制订同类薄片零件的磨削加工工艺方法提供了新的思路。 相似文献
3.
《新技术新工艺》2017,(3)
随着车铣复合加工技术的不断发展,复杂异形回转类零件越来越多地出现在工程应用中,为了满足这类工件的加工要求,正交车铣加工方法正在得到广泛的应用。在分析了大直径套筒类工件的内壁结构后,通过应用VERICUT软件进行加工仿真,提出了用正交车铣的加工方法来实现加工,通过铣刀高速切削和工件旋转的合成运动来实现对该类零件的切削加工;在对大直径套筒类工件内壁的加工方法的研究中,总结出刀具附加长度补偿量与工件在加工过程中过切的关系,首次提出并建立了正交车铣内表面刀具长度附加补偿量,确定了对于该类零件加工过程中加工刀具基准点的偏差规律,即刀具长度补偿算法规律,成功地解决了正交车铣大型复杂异形回转类零件的过切问题,通过添加宏程序段提高了编程效率,缩短了加工周期,保证了加工质量。 相似文献
4.
5.
6.
7.
利用机床数控系统用户宏程序功能,快速有效地建立零件不同加工面的工件坐标系,是卧式加工中心机床对箱体类零件实施多工位加工时,简化操作过程,保证加工效率和加工精度的现实需要。从坐标旋转变换的数学公式出发,通过建立机床机械坐标系、回转工作台中心、不同加工面工件坐标系间位置关系的数学模型,编制了能自动实现坐标旋转变换的宏程序。 相似文献
8.
9.
10.
11.
数控加工中工件的自动定位 总被引:1,自引:0,他引:1
提出了以工件为基准的自动定位原理,即当工件安装偏斜时,使工件坐标系自动适应机床的加工要求,该方法在测出工件的偏斜角度和偏移坐标值,并对原数控加工程序进行自动修正后,可方便实现。在不改变加工结果的情况下,可减少工件的找正和装夹时间。 相似文献
12.
Evaluating the influence of geometric errors in rotary axes is a common method used by a five-axis machine tool for improving the machining accuracy. In conventional geometric error models, the table coordinate system is considered as the final workpiece coordinate system. In this study, an additional workpiece coordinate transformation was proposed to identify the influence of geometric error. First, a cubic machining test was conducted. Second, the necessity of workpiece coordinate transformation was analyzed, and a method for coordinate transformation was proposed. In addition, both machining simulation and an actual machining experiment of the cubic machining test were conducted to verify the efficiency of the proposed method. The results indicate that the workpiece coordinate transformation is an essential part of the geometric error model for accurately simulating the geometric error influence. The method for identifying the geometric error influence considering the workpiece coordinate transformation is applicable in manufacturing. 相似文献
13.
利用数控机床工作台的回转中心设置工件零点的技巧 总被引:1,自引:0,他引:1
工件零点是工件坐标系的原点,在加工中心上一次装夹需要设置多个工件零点。利用工作台的回转中心可以同时设置多个工件零点,既准确方便,又节省辅助加工时间。 相似文献
14.
15.
肖庆和 《中国制造业信息化》2006,35(7):45-48
通过分析卧式加工中心机床坐标系与工件坐标系、工作台旋转中心之间的关系,并利用FANUC系统中的宏指令及参变量,开发数控系统功能。实现卧式加工中心机床在零件加工过程中,工作台任意角度旋转后,工件坐标系原点得到自动补偿与设定。 相似文献
16.
17.
对刀建立工件坐标系是数控加工操作的重要内容.正确的对刀操作,建立工件坐标系,编制符合加工工艺要求的数控程序,这是零件加工精度的保证,也是实现数控机床高精度和高效率的基本要求.从数控加工的对刀技术与程序编制的理论要求和实际应用两个方面进行了分析与探讨. 相似文献
18.
19.
20.
Short and safe tool setting by safe space in NC machining 总被引:1,自引:0,他引:1
Su-Jin Kim 《The International Journal of Advanced Manufacturing Technology》2007,33(9-10):1017-1023
The shortest tool setting is recommended to reduce the tool deflection and chatter in NC machining. However, it is not easy to shorten the overhang length because the holder can collide with the workpiece. In this paper, the safe and shortest tool-setting algorithm using a safe space is proposed and applied in NC machining. The safe space is the volume in a tool coordinate system that does not interfere with the workpiece and the holder located in the safe space never collides with the workpiece. So the tool holder assembly that has the shortest overhang length and does not interfere with a workpiece is possible using the safe space. This algorithm was implemented with C++ language and has been used by over 50 mold-machining companies for safe and short tool setting. 相似文献