共查询到20条相似文献,搜索用时 125 毫秒
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在大吨位卷扬机滚筒上广泛使用LEBUS绳槽双折线卷绕系统,该系统升降安全,并能大大延长钢丝绳的使用寿命。为了解决LEBUS绳槽的批量加工问题,设计了一种实用的LEBUS绳槽加工用数控系统,在对老旧的普通车床进行数控化改造时可以配套该系统。详细论述了LEBUS绳槽加工用机床数控系统的设计过程,包括CPU芯片的选择、存储器的扩展设计、I/O接口的扩展设计、键盘与LED显示接口的扩展设计,以及D/A接口的扩展设计等,并给出了LEBUS绳槽加工软件的设计思路。该系统控制精度高,结构简单,操作方便,性价比高,具有一定的推广应用价值。 相似文献
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WK-55挖掘机是太原重工研发的一款大型挖掘机,适用于2000万t及以上规模的大型露天矿采装作业.该设备提升卷筒采用焊接结构,绳槽布置为左右旋的双头绳槽,且有形位公差要求高的卷筒密封面加工.重点阐述绳槽加工、切削用量的选择及密封面抛光的加工方法. 相似文献
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目前在我国起重行业流行的“折线绳槽”一词,是指从国外引进的一种适合钢丝绳多层卷绕的绳槽形式。折线绳槽卷筒最早见于国外利巴斯公司的利巴斯装置中,其中利巴斯卷筒就是双折线绳槽卷筒,20世纪80年代引入我国,主要在矿山卷扬机和水工起重机械上应用。 相似文献
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《机械工程与自动化》2018,(6)
滚筒是石油钻机绞车的核心部件,要求在使用过程中具有良好的性能,需对其进行优化设计,主要涉及滚筒直径及长度、绳槽结构、绳槽间距、缠绳爬坡结构和改变钢丝绳缠绳的翻转机构,以满足钻井工艺中要求绞车运行平稳可靠的作业原则。 相似文献
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针对超大型、两半式绞车滚筒的加工制造,需要解决的主要问题有工艺流程的设计以及折线绳槽的加工程序编程。在保证零件质量和工艺设计合理性的前提下,通过对其结构特点及加工制造难点进行分析,制定了滚筒加工的制造工艺流程,以及滚筒折线绳槽加工时所用的工装夹具的设计。结合FANUC Series oi-TC数控系统分析了折线绳槽的加工方法以及粗、精加工过程刀具的走刀轨迹,完成了折线绳槽加工程序的设计,解决了滚筒加工制造过程中的工艺难点和绳槽加工的数控程序编制方法。 相似文献
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五轴NC加工中刀具运动包络面的计算 总被引:5,自引:3,他引:2
在机械加工过程中,刀具的铣削在加工体表面形成沟槽,对该沟槽型面的数字化描述是精确计算表面加工残差、判断加工干涉的理论基础,进而可实现表面加工精度评估与控制及加工轨迹全过程的精确规划计算。沟槽型面是刀具刃口回转面在空间运动形成的包络面的一部分,因此推导包络面的解析方程成为解决问题的关键。结合五轴加工机床的运动特点,通过建立加工刀具刃口回转面的数学模型,推导出五轴NC加工刀具运动刃口回转面包络的解析方程。数字仿真的结果与实际完全一致,验证了方法的正确性和有效性,具有较强的理论性和实用价值。 相似文献
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目前在机械加工领域,沟槽广泛出现在精密设备的关键件上,由于沟槽是由高精度的异形槽构成,因此采用传统加工工艺难度很大,加工成本过高。这里将高速切削技术应用到沟槽类零件的加工中,提出了零件的工装设计与装夹方案。并对高速切削过程中涉及的粗加工、半精加工和精加工策略进行探讨,最后总结出加工中缓解刀具寿命下降的工艺措施。 相似文献
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C.-K. Chen R.-Y. Lin 《The International Journal of Advanced Manufacturing Technology》2001,18(3):157-167
Most of the published work on developing design and manufacturing models of rotating cutters lacks generality and integrity.
In this paper, a systematic method that integrates design, manufacture, simulation, and remedy has been developed for a ball-end
type rotating cutter. The principles of differential geometry and kinematics facilitate the development of correlative models
of the cutting-edge and helical groove. Based on the envelope condition, approaches for solving the direct and inverse problems
related to the manufacturing models are also presented. The influences of relative feed speeds of the grinding wheel in machining
the groove are discussed, and following this the proposed feed speeds are designed. The effects of design and virtual manufacture
of the cutter are analysed according to the computer simulation results of the groove surfaces enveloped by the grinding wheel.
In addition, the post-process methods are introduced to finish the residual material and the land of the cutter. 相似文献
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近年来,随着数控加工技术的迅猛发展,数控机床在机械制造企业得到了广泛的使用,其逸择、使用与维护工作也就显得越来越重要。笔者就此问题提出自己的一些观点和建议。 相似文献
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Li Yong Guo Min Li Fang Zhou Zhaoying Department of Precision Instruments Mechanology Tsinghua University Beijing China 《机械工程学报(英文版)》2002,15(2):177-181
Micro electro discharge machining (micro EDM) is a feasible way to manufacture micro structures and has potential application in advanced industrial fields. For the realization of micro EDM, it is necessary to pay careful attention to its equipment design and the development of process techniques. The present status of research and development of micro EDM equipment and process techniques is overviewed. A micro electro discharge machine incorporated with an inchworm type of micro feed mechanism is introduced, and a micro electro discharge machine for drilling micro holes suitable to industrial use is also introduced. Some of the machining experiments carried out on the micro EDM prototypes are shown and the feasibility of the micro EDM technology to practical use is discussed. 相似文献
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Chun Hong Park Chang Kyu Song Jooho Hwang Byung-Sub Kim 《International Journal of Precision Engineering and Manufacturing》2009,10(4):85-91
The goal of this research is to develop a multi-functional ultra precision machine to generate micro features on large surfaces.
Design and characteristic analyses of our machine are presented. The analyses include its structural analysis and accuracy
tests. Each axis of the developed machine was corrected and/or compensated from accuracy tests enough to generate grooves
on workpieces with a less than 10 μm pitch size. After compensation, the 2-dimension position error between X-axis and Y-axis
was reduced to 1.4 μm for a 400×400 mm2 surface. From a 24 hours relative thermal displacement test between Y-axis and Z-axis, the machine showed a stable thermal
displacement which was measured to be less than 1 μm. From groove machining tests, our machine could successfully generate
5 μm and 10 μm pitch grooves and showed a stable micro machining characteristics. From this research, we can conclude that
the developed machine has mechanical characteristics enough to generate less than 10 μm pitch grooves on a 400×400 mm2 surface. 相似文献