出租车计价器系统设计英文原版

出租车计价器系统设计英文原版内容摘要：

hnical difficulties, and solve key technical problems, we can minimize the investment and make the most of their assets in stock, gain the greatest economic and social benefits. This is a great transformation of the market. Fourth, NC transformation of the content and gifted missing , the rise of foreign trade reform In the United States, Japan and Germany and other developed countries, and their machine transformation as new economic growth sector, the business scene, is in a golden age. The machine, as well as technology continues to progress, is a machine of the eternal issue. China39。 s machine tool industry transformation, but also from old industries to enter the CNC technology mainly to the new industries. In the United States, Japan, Germany, with CNC machine tools and technological transformation of production lines vast market, has formed a CNC machine tools and production lines of the new industry. In the United States, transforming machine machine tool industry as renewable (Remanufacturing) industry. Renewable industry in the famous panies: Bertsche engineering pany, ayton machine tool pany, DevliegBullavd (Bo) services group, US equipment panies. Companies in the United Statesrun panies in China. In Japan, the machine tool industry transformation as machine modification (Retrofitting) industry. Conversion industry 外文资料翻译 7 in the famous panies: Okuma engineering group, Kong 3 Machinery Company, Chiyoda Engineering Company, Nozaki engineering pany, Hamada engineering panies, Yamamoto Engineering Company. , the content of NC Machine tools and production line NC transformation main contents of the following: One is the restoration of the original features of the machine tools, production line of the fault diagnosis and recovery。 second NC, in the ordinary machine augend significant installations, or additions to NC system, transformed into NC machine tools, CNC machine tools。 its Third, renovation, to improve accuracy, efficiency and the degree of automation, mechanical, electrical part of the renovation, reassembly of mechanical parts processing, restore the original accuracy of their production requirements are not satisfied with the latest CNC CNC system update。 Fourth, the technology updates or technical innovation, to enhance performance or grades, or for the use of new technology, new technologies, based on the original technology for largescale update or technological innovation, and more significantly raise the level, and grades of upgrading. , NC transformation of the gifted missing reduce the amount of investment, shorter delivery time Compared with the purchase of new machine, the general can save 60% to 80% of the costs and transforming lowcost. Especially for large, special machine tools particularly obvious. General transformation of largescale machine, spent only the cost of the new machine purchase 1 / 3, short delivery time. But some special circumstances, such as highspeed spindle, automatic tray switching systems and the production of the installation costs too costly and often raise the cost of 2 to 3 times pared with the purchase of new machine, only about 50 percent of savings investment. stable and reliable mechanical properties, structure limited By the use of bed, column, and other basic items are heavy and solid casting ponents, rather than kind of welding ponents of the machine after the highperformance, quality, and can continue to use the new equipment for many years. But by the mechanical 外文资料翻译 8 structure of the original restrictions, it is not appropriate to the transformation of a breakthrough. bee familiar with the equipment, ease of operation and maintenance The purchase of new equipment, new equipment do not know whether to meet the processing requirements. Transformation is not, can be used to calculate the machine processing capacity。 In addition, since the use of many years, the operator of the machine has long been understood that in the operation, use and maintenance of the training time is short, quick. Transformation of the machine tools installed, we can achieve full load operation. can take full advantage of the existing conditions Take full advantage of the existing foundation, not like buying new equipment as necessary to build a foundation. can be used as control technology According to the development speed of technological innovation and in a timely manner increased level of automation in production equipment and efficiency, improve the quality of equipment and grades, and the old machine will be replaced by the current level of machine. 5, the choice of NC System NC system are the three major types of transformation, in accordance with specific circumstances Choose. , stepper motor drive the openloop system The servo drive system is stepper motor, stepper motor power, such as electrohydraulic pulse motor. NC system by sending mands to the progress of pulse, the drive control and power amplifier circuit, the stepper motor rotate through the gears with ball screw drive of the implementation of parts. As long as control mands the number of pulses, frequency and electricity sequence can control the implementation of parts of the displacement movement, speed and direction of movement. Such a system does not require the test will be the actual position and velocity feedback to the input, so called openloop system, the system accuracy of the displacement in the major decisions of the stepper motor angular displacement accuracy, transmission gear and other ponents of the leadscrew pitch accuracy, the accuracy of the lower displacement. 外文资料翻译 9 The system is simple, convenient debugging maintenance, reliable, low cost, easy modification success. , or asynchronous motor DC Motor Drive, grating feedback loop mea。