共查询到20条相似文献,搜索用时 62 毫秒
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《现代制造技术与装备》2016,(4)
随着科学技术的发展和我国社会经济水平的不断提高,我国需要大量数控设备操作人员和相应的数控设备专业维修人员。然而,目前我国数控设备操作与专业维修人员还相当匮乏。因此,通过分析我国企业数控工作的现状和前景,从课程方案、师资队伍的建设、教学模式方案等方面提出相关建议,以期为我国培养大量的数控维修专业人员。 相似文献
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北京博尔通科技发展有限公司 《制造技术与机床》2002,(12):59-61
数控设备出故障后 ,首先要判断是哪一部分的故障。只有准确定位到板级才能从根本上解决问题 ;而板级故障的诊断必须要在现场进行。所以 ,对故障设备进行现场分析是非常重要的。首先 ,现场维修人员应具备一定的基础知识和正确的诊断思路。其次 ,还须了解常用诊断方法和测量方法。具体介绍如下。1 现场维修人员的素质 (1)要具有机电控制的理论 数控设备是多种技术的综合体 ,包括自动化控制、计算机通信、机械及液压传动、测量技术等。对这些知识的系统化认识 ,有助于维修人员快速理解及掌握设备控制的全过程。(2 )了解设备操作的方法 … 相似文献
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本文从我国制造业领域数控设备维修人才奇缺的现状和需求出发,结合自身的数控设备维修经验,对数控车床四工位电动刀架常见的几种电气故障进行了分析和研究,并就故障排查的思路、步骤和解决方法做了详细的描述,为数控设备维修人员在工作中解决实际维修问题提供了一种清晰、有效的故障排查思路和方法. 相似文献
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阐述了等离子切割原理及等离子数控设备的组成,根据实训工厂多年来等离子数控切割设备的实际使用状况,介绍了降低等离子数控切割设备维修费用及生产成本的方法,以供有关单位及人员参考。 相似文献
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R. I. Nepershin 《Journal of Machinery Manufacture and Reliability》2011,40(2):140-148
A model of axisymmetric formation of a flange from a flat blank with a hole by expanding by a hard punch with a fixed flat
flange is given, taking into consideration contact friction, change of wall thickness, strengthening of material, and the
tool bending radius. Elastic, elastic-plastic and hard-plastic process stages are studied. 相似文献
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V. N. Danilov 《Russian Journal of Nondestructive Testing》2005,41(8):490-497
The influence of the pulsed operating mode on a bottom echo-signal level reflected from a plane surface of a cylindrical article is studied during variations in the article's radius. It is shown that the pulsed character of a signal smoothens this function significantly as compared to that in the previously computed continuous mode. Numerical estimates of the bottom echo signal have been made for the ultrasonic inspection of wheel-pair axles of railway vehicles. 相似文献
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广州市某冷库一台冷凝器压缩机在试压检漏时发生整体爆炸.经现场调查和对爆炸碎片、残骸的研究,分析了爆炸的过程,判断事故原因为试压工艺问题和操作不当,并给出了改进措施. 相似文献
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The problem of buckling of a thin elastic spherical shell inside a spherical cavity of uniformly contracting massive body is considered. This problem arises, for example, when designing pressure vessels made of composite materials with a thin metal cap layer. It is assumed that at the beginning of the compression the shell fits tightly against the wall of the cavity (to the rigid frame). An algorithm for searching the equilibrium state of the shell in the supercritical state is described. As a result of solving the problem, among other things, critical values of compressive strain and shell configuration in the supercritical state were obtained. 相似文献
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A. S. Ivanov M. M. Ermolaev V. I. Grek E. N. Nikol’skaya 《Russian Engineering Research》2010,30(3):224-227
A tight joint subjected to a torque is considered, in the case of pliability of the joint components and tangential pliability
of the contact layer. On that basis, the torque distribution over the joint length may be determined more precisely, and fretting
wear may be predicted. 相似文献
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I. K. Aleksandrov 《Russian Engineering Research》2014,34(4):275-276
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N. A. Kuchinskiy V. A. Baranov V. N. Duginov F. E. Zyazyulya A. S. Korenchenko A. O. Kolesnikov N. P. Kravchuk S. A. Movchan A. I. Rudenko V. S. Smirnov N. V. Khomutov V. A. Chekhovsky 《Instruments and Experimental Techniques》2014,57(5):553-557
Detector rate capability is one of the main parameters for designing a new detector for high energy physics due to the permanent rise of the beam luminosity of modern accelerators. One of the widely used detectors for particle track reconstruction is a straw-detector based on drift tubes. The rate capability of such detectors is limited by the parameters of readout electronics. The traditional method of increasing detector rate capability consists in increasing their granularity (the number of “elementary” detectors = readout channels) by reducing the straw diameter and/or by dividing the straw anode wire into two parts (for decreasing the rate per readout channel). A new method of designing straw detectors with a high rate capability is presented and tested. The method is based on dividing the straw cathode into parts and the independent readout of each part. 相似文献
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Improvement in the running-in of internal combustion engines by applying copper and antifrictional coatings to the cylinder
surface is considered. The recommended optimal conditions correspond to higher surface quality and shorter running-in. 相似文献