浅析数控机床维修中的三种故障检查法

在机械制造业不断发展过程中,如今机械生产制造单位在生产制造方面大面积使用了数控机床,不仅能够提升企业的生产效率,而且还能够保障产品质量,受到了广大企业的欢迎,并且在机械制造行业中所具有的地位也变得越来越重要。由于数控机床变得越来越先进,内部结构也变得越来越复杂,这便需要维修人员提升自身能力满足数控机床维修要求,可以采取适合的方法完成维修工作。基于此,本文就针对数控维修中的三种故障检查法进行研究,了解其在实际维修中的具体应用,也为其他维修人员提供一定参考。     

机床参数在维修过程中的作用及其应用

随着我国经济的快速发展,数控机床在工业生产中的应用越来越广泛,为了保证数控机床的正常运转,在使用过程中需要及时处理数控机床出现的各类故障,因此数控机床的维修就成为机床使用过程中必须解决的一个问题,在这一问题上机床参数具有重要的作用,对及时排除故障具有重要意义.论文根据现有的研究资料,从机床维修的角度阐述了数控机床参数在维修中的作用,并对各类参数在维修中的参数提出自己的一些看法,通过研究以期能够让机床参数更好的为数控机床的使用服务.     

对数控机床管理与维修的探讨

当今时代,随着机械制造自动化程度的提高,数控机床越来越引起人们的关注。数控机床的管理和维修是数控机床使用中重要的组成部分,数控机床的故障严重制约着数控机床的发展,这样数控机床管理与维修所占的地位就越来越重要,本文主要对数控机床管理与维修进行了探究和分析。     

数控机床的故障分析

目前，数控机床的应用越来越广泛，其加工柔性好，精度高，生产效率高，具有很多的优点。但由于技术越来越先进、复杂，对维修人员的素质要求很高，要求他们具有较深的专业知识和丰富的维修经验，在数控机床出现故障才能及时排除。我公司有几十台数控设备，数控系统有多种类型，几年来这些设备出现一些故障，通过对这些故障的分析和处理，我们取得了一定的经验。下面结合一些典型的实例，对数控机床的故障进行系统分析，以供参考。     

自动控制理论在数控机床维修中的应用探讨

数控机床的产品零部件较为复杂且繁多,并且对精度要求比较高,生产周期较短;数控机床时代的到来,为我国的各项工艺改革事业做出了巨大贡献。目前,自动控制理论在数控机床维修中应用越来越广泛,基于此,将结合实际,分析自动控制理论如何在数控机床维修过程中发挥最大作用。     

数控机床的现场维修

数控机床在国内的应用越来越普遍。如何在数控机床出现故障时，采取有效措施进行排除，使之尽快恢复生产，是生产企业和维修人员的当务之急。文中从现场维修的角度论述了对维修人员的基本要求及维修现场的注意事项等。     

机械工业出版社期刊读者服务部推荐书目

《数控机床维修工必备手册》本书从数控机床维护维修的角度出发,分别对数控机床的组成结构、数控机床维修的基本要求和方法、数控机床故障维修常用工具和检测仪器、数控机床常见机械电气等故障、典型数控系统故障的诊断与维修,以     

浅谈数控机床的故障诊断与排除

随着数控技术的发展，数控机床在机械制造业中得到了广泛的应用，其普及率越来越高。但由于数控机床技术复杂，一旦出现故障，维修难的问题严重影响了数控机床的有效利用。因而，本文结合实例，阐述了数控机床故障的诊断与排除方法，对数控机床的操作人员、管理人员、尤其是维修人员具有很好的借鉴作用。     

数控机床维修的方法和步骤

目前，随着社会的进步和科技的发展，数控机床越来越普及，数控机床的维修在工厂中越来越重要，但是数控系统种类繁多和故障复杂也给数控维修带来很大困难．根据对数控维修的一些经验，现总结一些数控机床故障处理的方法和步骤，供维修人员参考。     

数控机床故障的分析与排除

数控机床由于技术越来越先进、复杂,对维修人员的要求也越来越高。我公司有几十台数控设备,和多种类型的数控系统,几年来在数控机床的维修方面取得一定的经验。下面结合一些典型的实例,对数控机床的故障进行系统分析,供参考。 一、NC系统故障 1.硬件故障 由于NC系统硬件损坏,有时会使机床停机。对于这类故障的诊断,首先必须了解该数控系统的工作原理及各线路板的功能,然后根据故障现象进行分析,在有条件的情况下可用交换法准确定位故障点。 [例1]一台采用德国西门子SINUMERIK SYSIEM 3的数     

叶片泵在注塑机市场的配套趋势

面对新一代低能耗、高洁净注塑机面世给叶片泵配套带来冲击,该文介绍了轴向变量柱塞泵在低能耗塑机、内啮合齿轮泵在低噪声塑机的应用和无液压泵的全电动塑机,以及叶片泵在全液压塑机的应用现状。对高压叶片泵技术的未来与在注塑机市场的配套趋势作了预测。     

Precision contouring control of machine tools

Computer numerical control (CNC) machines are now widely used in the manufacturing industry. There is an increasing need for lower-costing machines capable of high precision machining. To achieve high precision machining, the motions of the axes of these machine tools need to be controlled precisely so that they follow a desired path, or contour, accurately. This paper discusses some of the factors that can affect the accuracy of the contour generated. Also discussed are some compensation approaches to compensating the geometrical errors of these machines so as to achieve precision results even with not-so-accurately build machines. Also presented and discussed are the results of approaches taken in improving contouring accuracy through the design and tuning of the machine axis controllers as well as some contour path compensation approaches.     

基于并联机床的高速切削技术

介绍了高速切削技术的关键技术和并联机床的优缺点，分析了并联机床用于高速切削的可行性，并以几个实例加以论证。     

Design principles of reconfigurable machines

Reconfigurable machines form a new class of machines that are designed around a specific part family of products and allow rapid change in their structure. They are designed to allow changes in machine configuration according to changes in production requirements. The reconfiguration may be related to changes in machine functionality or its scalability, i.e., the change in production volumes or speed of operation. Reconfigurable machines represent a new class of machines that bridges the gap between the high flexibility and high cost of totally flexible machines and the low flexibility and low cost of fully dedicated machines. The design principles of reconfigurable machines follow a similar philosophy, which was derived for reconfigurable manufacturing systems, and present an approach for the design of machines to be used mainly in high-volume production lines. This paper introduces design principles for reconfigurable machines, which may be applied in different fields of manufacturing. Based on these design principles, three types of reconfigurable machines were designed for various types of production operations such as: machining, inspection and assembly. This paper shows how the suggested design principles were utilized in the design of several full-scale machine prototypes and tested experimentally.     

Electrothermal effects of advanced electromagnetic materials on electrical loss and thermal characteristics of synchronous rotational machines

Electrothermal characteristics of high speed synchronous rotational machine were studied experimentally and theoretically. Electrical rotating machines with three types of electromagnetic materials were fabricated to identify core losses in the iron cores of high speed synchronous machine. Dummy and isolated rotational machines were devised to measure pure mechanical losses and to examine conductive thermal resistances in stators. Results showed that mechanical losses are linearly proportional to driving speeds of electrical rotating machines, and that viscosity-induced mechanical losses in air are relatively negligible in comparison with friction-induced mechanical losses. It was found that an electrical rotating machine with 15HTH1000 electromagnetic material has relatively lower core and coil losses than the machines with 35PN440, 35PN250, thereby making it applicable for advanced high speed electric vehicular applications. In addition, core materials had a negligible effect on torque constants of the electrical rotating machines at a lower non-dimensional rotational speed of 0.2. However, the rotating machine with 15HTH1000 showed an 8.0% higher input current than did that with 35PN440 at a higher rotational speed of 0.9. Finally, thermal resistances in between iron cores and stators could be accurately characterized by a nonlinear empirical formula with the minimum R² value of curve fittings equal to 0.997 which reflects the convection effects on heat transfer enhancement.     

A hybrid 5-axis CNC milling machine

5-Axis CNC milling machines are important in a number of industries ranging from aerospace to consumer-die-mold machining because they can deliver high machining accuracy with a spindle tilting capacity. Most of these machines have serial mechanisms so that modest static and dynamic stiffness become very critical design issues when high speed machining capability is required. Parallel mechanisms have recently received attention from machine tool designers because of their inherent potential for stiffness and because of their compactness. However, much of the promised advantages of parallel machines only occur within a very small region of their workspace. We discuss some of the kinematic and structural challenges to extract machining performance from serial and parallel machines. We compare a hybrid machine, which combines serial and parallel mechanisms, with typical serial and parallel machines such as Euler angle machines and a hexapod. In particular, we consider singularities, reversal characteristics, and manufacturability. We show that hybrid machines can benefit from the advantages of serial and parallel mechanisms while avoiding most potential pitfalls. However, hybrid structures can suffer from the manufacturing problem of over-constraint. We show that the degree of over-constraint depends on machine size. We have designed a small hybrid 5-axis motion platform, the MIT-SS-1, which can tolerate this over-constraint through a novel layout of axes. We show that this structure has potential as a small 5-axis CNC milling machine.     

面向绕线机的开放式数控系统

针对传统绕线机控制精度低、速度低和产品质量差等缺点,以微处理器MC68HC000为核心,采用集中控制、分时处理的工作方式,根据绕线机的特点开发一种具有高精高速的数控系统,驱动脉冲最高速率为500KPPS,驱动解析度为0．001mm／Pulse。辅以数控系统软件、绕线机系统开发工具和数控绕线机操作软件,为绕线机开发提供一个开放式的控制器设计平台。     

Characterization and compensation of dynamic errors of a scanning coordinate measuring machine

The necessity for reducing production cycle times while achieving better quality compels metrologists to look for new and improved ways to perform the inspection of parts manufactured. The advent of coordinate measuring machines led to a significant boost in accuracy, flexibility and reliability for measurement tasks. However, these machines are in some instances lagging behind machine tools and need improvement. One major limitation is the execution of measurements with low uncertainty at a reasonably fast rate to make it possible to measure more parts. This would ensure more reliability to the end product and better information to control the manufacturing process. Coordinate measuring machines with scanning capabilities offer the option to output high data density for parts at high speed. However, they are still considerably less accurate at faster measurement speeds and need to be improved. In this work a scanning measuring machine was extensively tested and a compensation model that accounts for part of its dynamic errors affecting measurement of circular features is proposed.     

并联机床高速加工性能分析

论述了并联机床在高速加工中的特点 ,分析了以串联式进给运动为特点的普通机床在高速加工中的局限性 ;提出了高速机床实现的设计要求 ,包括直接驱动技术、轻型复合结构和新机床运动学。对滑块式并联机构作了运动学、动力学和加工精度分析 ,给出了位移、速度和加速度及驱动力曲线 ;最后分析了并联机构在高速机床上的应用需解决的诸如串动和奇异空间问题     

CIMT’97主要展品的技术特点综述

两年一度的中国国际机床展览会是国际机床界和我国机械制造业的一件盛事。第五届中国国际机床展览会(CIMT’97)又一次荟萃了国内、外各机床厂及相关配套件厂和工具厂的精华,既可看到一些名牌企业享有盛名的产品,也会发现一些脱颖而出的新秀企业所展示的精品。从展览会上我们能深刻地领会到机床工具行业的发展动向,也能生动地观察到琳琅满目的新产品和新结构。从中既反映了丰富多采的世界先进实用制造技术和最新制造技术,也展示了中国机床工具行业通过“三大战役”在增强开发能力和竞争实力方面所取得的可喜的巨大进步。