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我国自70年代末从国外引进不少成套装卸设备,有些设备经过十多年的运行,需要进行全面的整修.按传统的修理方式,需要整机解体.这样既费时又费钱且影响生产.按现时普遍采用的总成更换法经济上也不合算.我们的做法是以恢复系统功能为目的的有针对性的设备整治.系统功能恢复性修理能够使财力、物力和修理效果三者合理地统一起来,以较小的投入达到最佳修理效果.修理项目的确定.首先对设备现状做全面客观的评估,然后对每个系统的功能作深入细致的分析,找出系统中丧失功能的零部件,据此制订出维修和更换方案.对占时少的修理项目,可见缝插针地安排到日常生产间隙中去,只对占时长的项目才集中起来统一修理.这样,我们就从面面俱到的整机解体修理走向有目的的经济维修.我们参照日本企业内部规范和国家标准,制订了有关影响系统功能正常发挥的零部件使用极限.1.机械部分(1)车轮轮缘磨损至原尺寸的50%;踏面磨损至原直径的3%;轮与轮间的直径差:主动轮为直径的0.2%,从动轮为直径的0.5%.(2)轴与轴衬间的间隙(表1)
China has imported many complete sets of loading and unloading equipment from abroad since the late 1970s, and some equipment has undergone more than 10 years of operation and needs a comprehensive renovation. According to the traditional repair methods, the whole machine needs to be dismantled. This is time consuming, costly and affects production. It is not economically viable to adopt the assembly replacement method that is widely used at present. Our approach is to achieve targeted equipment remediation for the purpose of restoring system functions. Systematic functional recovery repairs can rationalize financial, material and repair effects. Unite together to achieve the best repair effect with a small investment. Confirm the repair project. Firstly, make a comprehensive and objective assessment of the current situation of the equipment. Then analyze the function of each system in detail and find out the zero of the loss of function in the system. Components, based on which to develop a repair and replacement program. Occupy less time for the repair project, visible stitches to arrange to the gap in the daily production, only for the duration of the project to focus on unified repair. In this way, we from all aspects of the whole The dismantling of the aircraft is directed towards the purpose of economic maintenance. We have formulated the relevant functions of the system in accordance with the internal norms and national standards of Japanese companies. Limits for the use of parts. 1. Mechanical parts (1) The wheel rim wears to 50% of the original size; The tread wears to 3% of the original diameter; The diameter difference between the wheel and wheel: The drive wheel is 0.2% of the diameter, driven wheel 0.5% of diameter. (2) Clearance between shaft and bushing (Table 1)