刀具前角与切削深度影响木塑复合材料切削性能试验研究

Experimental Research on Cutting Performance of Wood-plastic Composites by Tool Rake Angel and Depth of Cut

木塑复合材料是一种具有优异的力学性能且环保的材料,但木塑复合材料在二次加工过程中,由于切削参数的不同致使加工质量有所不同,为研究它们之间的规律,以聚乙烯基木塑复合材料为试验材料,通过建立线性回归模型与方差分析,研究切削参数与切削性能之间的关系。研究结果表明:切削力表面粗糙度Ra随着刀具角度的增大而呈现下降趋势,随着切削深度的增大而逐渐增大,方差分析表明:刀具前角γ和切削深度h对切削力影响非常显著,且切削深度h>刀具前角γ;刀具前角γ、切削深度h和二次项(h^(2))对表面粗糙度Ra的影响非常显著,且刀具前角γ>切削深度h。在木塑复合材料精加工过程中,可以通过较大的刀具前角和低切削深度产生更好的表面质量,继而提高加工效率。

Wood-plastic composite material is an environmentally friendly material with excellent mechanical properties.But in the secondary processing process of wood-plastic composite material,the processing quality is different due to the difference of cutting parameters.To study the interaction between them,this paper takes polyethylenebased wood-plastic composites as the test material and analyzes them by establishing a linear regression model and variance analysis.The research results show that when the cutting depth is 0.7 mm and the tool rake angleγis 5°,15°,and 25°,the surface roughness Ra of the cutting force decreases with the increase of the tool angle.When the rake angle of the tool is 25°and the cutting depth h is 0.1 mm,0.3 mm,0.5 mm,0.7 mm,and 1.0 mm,the cutting force surface roughness Ra increases gradually with the increase of the tool angle.Analysis of variance showed that under the 0.05 significant level,tool rake angle and depth of cut had significant effects on cutting force and surface roughness Ra.By analyzing the significance of the influence of various factors on the cutting force,it is found that the tool rake angleγand the cutting depth h have a very significant influence on the cutting force,and the cutting depth h>the tool rake angleγ.After analyzing the significance of the influence of various factors on the surface roughness Ra,it is found that the tool rake angleγ,the cutting depth h,and the quadratic term(h^(2))have a very significant influence on the surface roughness Ra,and the tool rake angleγ>the cutting depth h.In the finishing of wood-plastic composites,a larger rake angle and a low depth of cut can produce better surface quality,thereby improving machining efficiency.