The Development Of The Computation Program For Crawler Crane Mechanisms Design

The Development of the Computation Program for Crawler Crane Mechanism Design With the rapid development of China economy, the proportion of infrastructural construction of our country become more and more large, the quality, volume and lifting height of goods which required to lift are much more great, Crawler Crane stands out from many lifting equipments for its unique advantages, and well enjoyed by the customers. Therefore, the domestic crane industry boom to develop crawler crane. In order to speed up the development pace of crawler crane, , shorten the design cycle, reduce the calculation workload of designer and enhance the calculation accuracy of overall design, Xuzhou Heavy Machinery Co., Ltd. with the Mechanical Science and Engineering college of Jilin University to investigate the above questions. This paper is carried out based on the actual production questions.All sorts of major mechanisms of the crawler crane are mainly in order to accomplish the different moving requirements. For example,to make the objects move from one place to another in spaces needing vertical direction and two horizontal directions motions. Although there is some different among working mechanisms of crawler crane,which normally contain hoisting mechanism, luffing mechanism, slewing mechanism and travelling mechanism.Relying on hoisting mechanism to accomplish heavy objects up and down in the vertical direction,luffing mechanism and slewing mechanism to achieve heavy objects moving in the two horizontal directions, and travelling mechanism to make objects move in arbitrary directions in spaces where crawler crane can get and transfer workplaces. All thess four mechanisms are the crawler crane's basic mechanisms.For designers, it is a complex and changeable work to design and calculate the crane mechanism parts, and the calculated results between different designers are often vary widely. Meanwhile, the accuracy of manually check calculated results are very poor, often varies from person to person.In order to reduce the crawler crane calculation work with cumbersome theoretical analytic method for designer in the early design period, to ensure that designers can design and calculate all sorts of mechanisms quickly and precisely, also including parts selection, and to make this documentations automatically generated as reference design data available for designers. The paper described working principle, theoretical idea of design and complete calculation formula for calculating of all sorts of major mechanisms in detail. Meanwhile, the whole writing process of crawler crane mechanism design and selection program was recorded on the paper.The computational procedure is based on the C++Builder6.0 develop environment, and theoretical analytic methods are based on existing theoretical formulas,as well as a number of personnel exchanges with designer of Xuzhou Heavy Machinery Co., Ltd, summarized and analyzed the calculation text at last.By designing and calculating the hoisting mechanism of QUY350 crawler crane and parts selection, the interfaces of computational procedure and using methods are described, and some matching analysis for parts selection results after calculating by software are also described. Using this calculated program, enter the specified technical parameters, result can be quickly calculated and automatic selected of components. meanwhile, in order to meet the needs of Designer, designers can able to artificial selected components according to data obtained from the results of calculation. Program also provides connections which can take out the entering parameters, indirect calculation results and selection results in the document format saved as for reference or technical document.The computational procedures interface is friendly, simple operation, fault-tolerant capability. Not only enhance calculate efficiency with theoretical analytic method for Designer, but also designers can according to theirs experience to change the corresponding parameters repeatly .All sorts of mechanism parts of the crawler crane selections can manual optimize,if designer use the software. It is a powerful tool for enterprises seriation designing.The program was used and some feedback information is given by designers, after several times improvement, this software has been finally appreciated by designers.