Application Research On The Smed Idea In RC Company Final Assembly Line

The products of RC manufacturing company are the special products of measuring railway in the railway market.With the increasing of railway speed,and despite the low market demand and severe competition,the market demand for products is also increasing,which asks for a wide variety of products with fast delivery time,stable quality and low price.To meet the diversification and urgency of market demand,manufacturing mode must be more balanced,production line exchange must be more agile and less time consuming to boost productivity and make the enterprise production system be more flexible.However,the company's current production system cannot meet the market requests because it has revealed many problems in the multi-product and small-lot market environment.For this reason,this paper applies single minute exchange of dies(SMED)ideas of Lean Production(LP),improving the company leading product's Final Assembly Line's(FAL)quick exchange which operated manually,to adapt the new market requirements.Product's final assembly is the last working procedure of production line,combining with assembly product's structural characteristics,and lays out body operation and inner operation two-dimensionally to ensure inner operation of being down for the line exchange and standardized workflow of quick exchange.Product's final assembly is the last working procedure of production line,combining with assembly product's structural characteristics,and lays out body operation and inner operation two-dimensionally to ensure inner operation of being down for the line exchange and standardized workflow of quick exchange.A technical approach of productive trading and quickly switching production system which suits products' self feature is set up,that is,Quick Exchange of manual operation Final Assembly Lines(QEFAL)technology.The results show it can solve the practice problem in production process,and bring better economic benefit by implementing quick exchange.The total time of QEFAL reduced from the original 44 hours to 11.75 hours,the production cycle being 26% ahead of time,which supplies extra 33.6 million output value and saves 138,600 Yuan cost in a year for the company.The Improved FAL can more quickly respond to the multi-product and small-lot market demands,reduce lead time,reduce waste,reduce inventory,and makes enterprise more competitive in market.It can provide some beneficial experience and references for the similar productive enterprises.The main contents of this paper are as follows:Firstly,it introduces the background of RC company's products under the industry market environment and product features,the purpose of this study,the major framework of main content and some methods in the study.Secondly,it illustrates origins,concepts and features of LP and SMED theory,analyzing logical relationship between SMED and other technological tools of LP,and implementation step of SMED.The QEFAL technology is advanced by the extracted idea of SMED.By collecting and analyzing LP and SMED documents at home and abroad,finds out the main views of representative authors,research methods and application areas.However,there are rare documents about the quickly exchange field in this study.Thirdly,it introduces production management and production status of RC company,and describes the manufacturing process and FAL process of leading products in the form of flowcharts.Management issues,worker and process problems existing in the two flow present situation are found out and analyzed the reason one by one separately,which are good prepared to quick line exchange.Finally,it studies and improves the leading product's procedure of quick exchange of the leading products FAL.First,it follows the steps of line quick exchange,and analyses the reason and rectify the questions in the aspects of shorting the working time,converting work-item attributes,improving workflow and standardized line exchange process.Then,It objectively evaluates the effect of carrying out line quick exchange in the main aspects of time,process,capacity and quality,verifies the effectiveness of the FAL quick exchange,and effectively shortens the production cycle,increases capacity,reduces working hours and decreases manufacture cost.