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车-车拉工艺是现今汽车发动机曲轴主轴颈粗、半精加工中广泛应用的切削工艺。本文对车-车拉加工工艺流程进行了阐述,选取该工艺中最为复杂的斜刃车拉加工工序为研究对象,对涂层硬质合金斜刃车拉刀片的几何结构及涂层特点进行了分析。并基于Schroeter R B等人的试验方法,通过对刀具安装方式和工件材料的设计,在CNC斜床身车床上建立了切削模拟试验平台。通过改变总切深ap与进给量f,对斜刃车拉加工工艺进行了切削模拟试验,研究了斜刃车拉刀片的受力变化特点,以及上述两参数对切削力、加工表面圆度与加工表面粗糙度的影响特征。研究结果表明:在切削速度170 m/min条件下,斜刃车拉切削参数在总切深ap=0.15～0.2 mm,f=0.1～0.15 mm/r范围内选取,能获得较好的切削效果。
Car - car pull technology is the current automobile engine crankshaft coarse, semi-finishing of the widely used cutting technology. This paper elaborates the car-car pull process, selects the most complex process of the ramp car pull processing as the research object, the geometry and coating characteristics of the coated carbide bevelled car pull blade analysis. Based on the test method of Schroeter R B et al., A cutting simulation test platform was set up on a CNC slant lathe through the design of tool installation and workpiece materials. By changing the total depth of cut ap and feed f, the slant edge car pull machining process was simulated by cutting force of the rake car, the force variation characteristics and the above two parameters on the cutting force, machined surface roundness And processing surface roughness characteristics. The results show that under the condition of cutting speed of 170 m / min, the cutting parameters of inclined car can be selected in the range of ap = 0.15-0.2 mm and f = 0.1-0.15 mm / r, which can obtain better cutting effect .