Research On The Application Of The Skeleton Fixture Based On The Requirment Of Bus Production

The order-based production model in China's bus manufacturing industry decided the variability of the bus manufacturing process,which brings the instabile quality of production,production efficiency and make the designer get a heavy workload,repetitive labor and other issues,as a result,became technical difficulty in bus manufacturing industry.The constructive and significant research ideas formed through the practical application can help reduce the kinds and amounts of skeleton tooling which means the improvement of the quality and efficiency of the design.Shorten the skeleton tooling production cycle can reduce tooling input and the production costs.Bulid the design modle which has our own character.Achieving skeleton tooling modular design and a large group of welding tooling standardization to reduce the duplication of tooling designer.Firstly,it analyzes the characteristics of the bus and carries out the general arrangement of the welding jig.The structure of the big frame of the bus is very different-with their own characteristics-which determines the skeleton group welding fixture also has its own characteristics.In order to meet the production cycle and the quality control,the large pieces of welding fixture should form a certain common.These common need to establish an overall skeleton tooling ideas on process assurance work guidance.Therefore,the research and the application of skeleton tooling is necessary to manufacturers.Then,to explore the characteristics of the product structure changes caused by the design of products to adapt to the product design through changing the structure of the tooling to form the product-specific tooling.At the same time,it can be reasonably determined by the scope of the main parameters of the product range and series of spectrum and to determine the tooling system to build the product design specifications and types of coverage.Analysis of the characteristics of skeleton slices,set the optimal tooling structure,fusion welding technology,passenger car manufacturing process,block analysis and modular design.According to the product line type spectrum,to achieve a multi-series tooling compatible multi-variety models,to build generic template.The design and practice of the application of proven templates to manage and use,the formation of research results for verification.The establishment of skeleton tooling system is the formation of order-based tooling security system,through the analysis of product characteristics of the common,modular,tooling in the modular structure of such modular design and guidance,the formation of constantly changing Products in the same class or even the same tooling application.Finally,from practice to practice.Strengthen the standardization of tooling design,pedigree,universal,modular and promote the curing of this design concept.The implementation of sub-maternal tire design,according to the product structure to promote the use of fusion skeleton small assembly tooling,through a small assembly tooling to complete the rigidity of some components and then assembled on a large assembly tooling combination.The implementation of modular design,according to the local structure of the product of the common fixed,designed for the production of special tooling can be embedded in other large tooling can also be used as sub-assembly station peripherals.Development and design part of the detachable adjustable universal positioning mechanism,and constantly optimize the positioning mechanism,curing the most suitable for the special positioning unit.The use of automated,convenient fixture for large pieces of the tire,the design process to use more manual fixture,replacement replacement cycle is short,easy to use,easy to be front-line staff to accept;for the equipment or large-scale mixed use pneumatic fixture,the use of long cycle,A high degree of mechanical automation,bulky easy to operate.Speed up the integration of automation technology,to further improve the level of tooling design and production accuracy,and widely promote the application of new equipment to speed up the process of arc welding robot applications,test automation in the bus large skeleton of the application,and as an opportunity to improve the accuracy of tooling level.