Medium density fiberboard(MDF)is widely used in the wooden furniture industry,and helical tooth milling has the advantages of stable processing process and good surface quality.Compared with multi edges helical milling cutters,single edge helical milling cutters also have their own unique advantages in board processing.In practical pro-duction,single edge helical milling cutters are often used for cutting and milling MDF.Therefore,studying the cutting performance of single edge helical milling cutters in milling MDF has certain theoretical significance and practical va-lue.This study conducted milling experiments on MDF using a single edge helical milling cutter with a diameter of 6 mm.On the basis of investigating the influence of feeding rate and milling depth on the surface roughness Ra of milling MDF by line chart method,and by combining Design-Expert software,a quadratic regression model was established by the response surface methodology to describe the relationship between input variable(feeding rate and milling depth)and response variables(surface roughness Ra),in order to find out the relationship between surface roughness and cutting conditions,and determine the optimal combination of milling parameters.The experimental re-search results showed that the quadratic regression model established by the surface response methodology in this study had a high degree of fitting and could be used for predicting and optimizing the surface roughness Ra of milling MDF.When using a single edge helical milling cutter to mill MDF,the machined surface roughness Ra was positively corre-lated with the feeding rate and milling depth,that is,the machined surface roughness Ra increased with the increase of feeding rate and milling depth.The machined surface roughness Ra was mostly affected by milling depth,followed by feeding rate,and was slightly affected by the interaction between the two factors.The feeding rate and milling depth of the optimized combination were 933.75 mm/min and 0.86 mm,respectively,which resulting in a minimum surface roughness Ra of 7.70 μm.
关键词
单刃螺旋铣刀/中密度纤维板/表面粗糙度Ra/响应曲面法/优化
Key words
single edge helical milling cutter/medium density fiberboard/surface roughness Ra/response surface methodology/optimization
维普
万方数据