Research Of Design Management For Ladders And Platforms Of Quayside Crane Based On Z Company

With the development of economic globalization and market internationalization,economic and trade exchanges between countries are increasingly frequent.With its unique convenience,security and reliability,container transportation has become one of the important ways to connect the goods trade between various countries.With the increase of container freight volume,the demand of large quayside container crane(hereinafter referred to as quayside bridge),as the main container handling tool,is also increasing.Z company is a large container crane manufacturer,which is typical and representative in the industry.With the increasing order of quayside bridge,the design task is more and more heavy,and the design work of the ladder platform of the accessory parts of quayside bridge is very heavy.The shape of ladder platform is complex and changeable,and the drawing is complicated.In the design process,it is necessary to coordinate with many departments.It is not only necessary to consider the design drawings of main structure and mechanism,to avoid the interference of ladder platform with it,but also to take into account the problems of hydraulic pipe layout and electrical wiring.Therefore,the design process often needs repeated communication and modification,with a long design cycle and easy to make mistakes.Moreover,the design specifications,standards,structural forms,dimensions and user requirements of each machine in each country are different,so the ladder platform design of each shore bridge is totally different.These complex factors together make the design efficiency meet the bottleneck,and the design error rate is also high.Aiming at the problem of high error rate in the design of ladder platform of quayside bridge,this paper analyzes and studies the causes of this problem,studies the scheme of replacing two-dimensional design with three-dimensional design,considers the transition stage from two-dimensional design to three-dimensional design,establishes three-dimensional standard parts library and design specification,avoids most human design errors,so as to reduce the design error rate and improve the design quality,reduce production cost.Aiming at the problems of low design efficiency and long design period of ladder platform of quayside bridge,according to the analysis of existing design process,the critical path method is studied.Starting from the critical path,the critical node time is shortened.The collaborative design and parallel design are carried out by using three-dimensional parametric design and data management software.Multiple measures are taken simultaneously to optimize the design process,effectively shorten the design period and improve the design efficiency rate.Aiming at the evaluation of ladder platform design quality of shore bridge,this paper introduces the concept of total quality management,establishes the mathematical model of ladder platform design evaluation index system by using fuzzy comprehensive evaluation method,unifies the qualitative analysis and quantitative evaluation,improves the operability and scientific rationality of the evaluation,and solves the problem that the evaluation of ladder platform design quality is difficult to quantify.This paper applies these design management methods in the design of ladder platform of Z company's shore bridge project,and verifies the importance and feasibility of design management through the evaluation of the actual effect of the project application,as well as the positive effect of these methods on improving the design management status of Z company's ladder platform.This paper helps Z company improve the design quality of ladder platform by optimizing the design management process,it also provides some references for the design management process of shore bridge and similar large port equipment.