论文部分内容阅读
随着电子技术和自动化技术的发展,数控技术的应用越来越广泛.这种以微处理器为基础,以大规模集成电路为标志的数控设备,已在我国批量生产、大量引进和推广应用.它们给机械制造业的发展创造了条件,并带来很大的效益;同时,由于它们的先进性、复杂性和智能化高的特点,在维修理论、技术和手段上都发生了飞速变化.数控维修技术不仅是保障系统正常运行的前提,对数控技术的发展和完善也起到了巨大的推动作用,因此,目前它形成了一门专门的学科.此外,任何一台数控设备都是一种过程控制设备,这就要求它在实时控制的每一时刻都准确无误地工作,任何部分的故障与失效,都会使机床停机,从而造成生产停顿.因此,对数控系统这种原理复杂、结构精密的装置进行维修无疑是十分必要的.尤其是引进的CNC机床,其购置费高达几十万到上千万美元,在许多行业中,这些设备均处于关键工作岗位,若出现故障后不能及时排除,就会造成较大的经济损失.但是,我们目前的维修状况和水平与国外进口设备的设计与制造技术水平存在着很大的差距,其原因在于:人员素质较差,缺乏数字测试分析手段,数域和数域与频域综合方面的测试分析技术有待提高等等.下面,从现代数控系统的基本构成入手,探讨数控系统的故障诊断与维修.一、数控系统的构成与特点目前,
With the development of electronic technology and automation technology, the application of numerical control technology is more and more widely.The microprocessor-based numerical control equipment marked by large-scale integrated circuits has been mass-produced in our country with a large number of introduction and popularization and application They have created conditions and brought great benefits to the development of the machinery manufacturing industry. At the same time, due to their advanced nature, complexity and intelligence, rapid changes have taken place in maintenance theory, technology and means . CNC maintenance technology is not only the premise of guaranteeing the normal operation of the system, but also has a tremendous impetus to the development and improvement of CNC technology. Therefore, it has formed a special discipline. In addition, any CNC equipment is a The process control equipment, which requires it to work in real-time control of each moment accurately, any part of the failure and failure, will make the machine downtime, resulting in production pause.Therefore, the principle of CNC system is complex, the structure Precision equipment for maintenance is undoubtedly very necessary.Especially the introduction of CNC machine tools, the purchase cost of up to hundreds of thousands to tens of millions of dollars in many industries, These devices are in key jobs, if the failure can not be ruled out in time, it will cause greater economic losses.However, our current state of maintenance and the level of imported equipment and the design and manufacture of imported equipment there is a big gap between the level of technology , The reason is that: the quality of personnel is poor, the lack of digital test analysis means, the number of fields and the number of fields and frequency domain synthesis testing techniques need to be improved, etc. Next, starting from the basic structure of modern numerical control system to explore numerical control system Fault diagnosis and maintenance. A, the composition and characteristics of CNC system At present,