Chip morphology and cutting temperature of ADC12 aluminum alloy during high-speed milling

The ADC12 aluminum alloy is prone to severe tool wear and high cutting heat during high-speed milling because of its high hardness.This study analyzes the highspeed milling process from the perspective of different chip morphologies.The influence of cutting temperature on chip morphology was expounded.A two-dimensional orthogonal cutting model was established for finite element analysis(FEA)of high-speed milling of ADC12 aluminum alloy.A theoretical analysis model of cutting force and cutting temperature was proposed based on metal cutting theory.The variations in chip shape,cutting force,and cutting temperature with cutting speed increasing were analyzed via FEA.The results show that,with the increase in cutting speed,the chip morphology changes from continuous to serrated,and then back to continuous.The serrated chip is weakened and the cutting temperature is lowered when the speed is lower than 600 m·min^(-1)or higher than 1800 m·min^(-1).This study provides a reference for reducing cutting temperature,controlling chip morphology and improving cutting tool life.

摆线齿轮滚齿切削力及温度仿真分析

为研究滚齿加工参数对切削力及温度的影响规律,分别利用包心法和平面啮合原理构建圆弧-短幅外摆线齿轮和对应滚刀几何模型。基于构建的几何模型建立摆线齿轮滚齿加工热力耦合有限元模型,分析不同滚齿切削速度和轴向进给量的影响。结果表明:摆线齿轮滚齿加工过程中,轴向切削力随加工时间快速增大,经过一段稳定阶段后迅速降低,径向切削力先快速增大后逐渐减小,切削温度先快速增大后进入稳定阶段;轴向进给量在0.25~0.75 mm/r范围内,轴向和径向切削力及切削温度均增长缓慢,在0.75~1.00 mm/r范围内均增长快速,滚齿切削速度对轴向切削力影响较小,而对切削温度影响较大。

滚齿加工中仿真分析方法应用探讨

滚齿加工由于生产率高/通用性强,在齿轮的制造过程中一直比较受重视。但由于滚齿加工成形过程的复杂性与特殊性,需要建立仿真模型以及方法来辅助分析这一过程。通过CAD几何仿真与有限元仿真研究两个方面进行论述,从切屑、切削力、切削温度和刀具磨损等方面,阐述国内外学者主要研究方法和已取得的成果,分析目前研究中存在的不足,进行总结并展望,为滚齿加工工艺优化、切削刀具寿命和工件表面质量提高等研究提供一定参考和借鉴。

高速干式滚齿切削温度理论及实验研究

高速干式滚齿加工是近年来发展的一种高效率的绿色齿轮制造技术,它克服了传统齿轮加工生产效率低下、生产成本高、污染环境及危害工人身体健康等缺点。基于金属切削原理、传热学理论及滚齿加工原理,建立了高速干式滚齿的切削温度模型,应用有限元法仿真分析了滚刀的切削温度场;通过高速干式飞刀铣齿来模拟滚齿实验,结合理论仿真和实验测量结果,综合分析高速干式滚齿的切削温度与切削参数之间的变化规律。