共查询到19条相似文献,搜索用时 109 毫秒
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巧用旋转指令简化数控铣削编程 总被引:1,自引:0,他引:1
在数控铣削程序的手工编制中,正确合理地使用旋转指令可以减少计算量,降低出错率,提高编程效率.通过操作实践,总结出旋转指令的基本用法和高级用法,并给出了相应的应用实例,达到简化编程的目的. 相似文献
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通过典型数控铣零件的工艺分析及编程,讲述了数控铣编程与加工的基本步骤。通过编程实例讲述了主程序、子程序、固定循环、旋转加工指令的应用。 相似文献
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三菱PLC“先入先出”功能指令的应用 总被引:2,自引:0,他引:2
三菱PLC中有许多功能指令,合理灵活应用功能指令进行编程,可以避免使用基本指令出现的程序长、编程难度大、程序可靠性差的缺点。本文以一个典型分拣系统控制为例,论述了"先入先出"功能指令的应用。 相似文献
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电火花线切割机的数控编程分手工编程和自动编程。1 手工编程 对几何形状简单的工件用手工编程方便灵活。要掌握手工编程方法,首先应了解3B、4B、ISO几种指令格式。1.1 3B指令格式 基本格式:B********B******* 相似文献
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阐述了SINUMERIK 840D数控系统高级编程指令在专机复杂轨迹处理中的应用.介绍了SINUMERIK 840D数控系统高级编程指令中的2D+N螺旋插补功能及轨迹位移性能-联动功能,并进行了有针对性的应用举例.SINUMERIK840D数控系统高级编程指令的开发为专机制造提供了一种新的思路. 相似文献
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环形阵列图形的编程技巧在数控铣削加工中的应用 总被引:2,自引:1,他引:1
陈益林 《组合机床与自动化加工技术》2009,(11)
针对数控铣削加工过程中的环形阵列图形,恰当应用数控系统提供倒角、旋转、R参数及定向指令,提出了避免和减少节点计算的措施,抬刀和下刀应注意的问题,循环基体的选择,以及主程序和子程序的编制.通过实际加工表明,提出的编程方法和技巧,能有效减少节点的计算、减少程序段数目、提高编程效率和生产效率、保证加工质量,并增强了程序的重用性. 相似文献
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Development of the active balancing device for high-speed spindle system using influence coefficients 总被引:10,自引:0,他引:10
Jong-Duk Moon Bong-Suk Kim Soo-Hun Lee 《International Journal of Machine Tools and Manufacture》2006,46(9):978-987
A high-speed spindle can be very sensitive to rotating mass unbalance which has harmful effect on many types of rotating machinery. Therefore, the balancing procedure is certainly needed to reduce vibration in all high-speed rotating systems. In this study, an active balancing program using influence coefficient method and an active balancing device of an electro-magnetic type with both simple and reliable structures were applied to the developed high-speed spindle system. A gain scheduling control using influence coefficients of the reference model was proved to be effective in balancing the spindle system although its characteristics were changed. The stability of reference influence coefficients was verified by experiments with frequency response functions. The active balancing experiment of the manufactured spindle system using an active balancing program and device was also performed efficiently during the operation. As a result, controlled unbalance responses after balancing work were below the vibration limit at all rotating speed ranges including critical speeds. 相似文献
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用RU-1000转靶X射线源及其测角仪系统,采集了金属玻璃Cu_(70)Ti_(30)室温(T=300K)和低温(T=80K)Cu的K吸收EXAFS谱。用本实验室编的“EXAFS数据处理程序库”对数据进行处理,以理论计算背散射振幅及相移值作数据拟合的方法,得到Cu原子与近邻原子的间距、配位数及Debye-waller因子等。讨论了Cu_(70)Ti_(30)金属玻璃中化学短程有序及Cu原子近邻结构的特征。 相似文献
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In order to detecting and tracking along the weld seam with rotating arc sensor in underwater welding,the highpressure water environment rotating arc welding hardware platform is established and welding experiments using rotating arc sensor is done.Different radius of rotating arc sensor is used.And the corresponding welding current and voltage is obtained,which is compared with the results of rotating arc sensor short-circuit process simulation model under high-pressure water environment established in this article.The results show that under high-pressure water environment,rotating arc radius should be optimized,otherwise the short-circuit-arcing cycle will transit to a short-circuit-arcing-abruption cycle,making the welding quality poor.At last the critical radius between the short-circuit-arcing cycle and short-circuit-arcing-abruption cycle under high-pressure water environment is obtained. 相似文献
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《Intermetallics》1999,7(2):193-199
In order to evaluate the rotating strength of TiAl alloys, mechanical and rotating burst testing were conducted on wrought TiAl having various microstructures. The rotating burst strength of the nearly lamellar (NL) structure was greater than near gamma (NG) or fully lamellar (FL) structures. The mechanical properties which have an affect on the rotating strength were yield strength and elongation, and only a slight amount of elongation allows the rotating burst characteristics of TiAl alloys to change from ceramic-like maximum stress dependency to metal-like mean stress dependency. It was estimated that forged NL–TiAl has greater rotating strength above 1000 K than superalloys in current use. 相似文献
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为了进一步提高现有中速地铁车辆的稳定性和节省低地板车辆的空间,解决由于结构剩余空间不足及车辆限界限制导致无法加装抗蛇行减振器的问题,提出一种适用于铁道车辆的抗蛇行旋转减振器。将传统旋转减振器隔板上的滑阀式阻尼阀系更改为成本低廉的阀片式阻尼阀系,便于通过增加或减少阀片数量调节阻尼阀以适用于铁道车辆的节流特性。相比于传统的铁道车辆筒式液压减振器,旋转减振器具有结构可靠、散热性能更好、安装空间小、安装灵活等优势。建立旋转减振器的数学模型,并与传统抗蛇行减振器的试验结果进行对比,验证旋转减振器模型的准确性;建立旋转减振器与地铁车辆动力学联合仿真模型,分析旋转减振器对车辆系统动力学性能的影响。仿真结果表明:旋转减振器能够代替抗蛇行减振器提供回转阻尼,使中速地铁车辆具有更好的稳定性和平稳性,同时满足曲线通过的要求。 相似文献