發(fā)布時(shí)間：2018-03-29 19:13

  本文選題：硬質(zhì)合金　切入點(diǎn)：切削力　出處：《機(jī)械科學(xué)與技術(shù)》2017年04期

【摘要】：研究了激光加熱與超聲橢圓振動(dòng)復(fù)合切削條件下,使用CBN(立方氮化硼)刀具對(duì)硬質(zhì)合金材料進(jìn)行精密加工的切削特性。利用有限元仿真,分析硬質(zhì)合金材料在普通切削、一維超聲振動(dòng)切削、超聲橢圓振動(dòng)切削與激光超聲復(fù)合切削4種切削方式下的切削力變化特征。采用超精密車床與YAG激光器、自主研發(fā)的超聲振動(dòng)裝置等輔助設(shè)備,實(shí)驗(yàn)研究了激光超聲復(fù)合精密加工硬質(zhì)合金的切削特性。通過一系列的對(duì)比實(shí)驗(yàn),分析切削參數(shù),如切削速度、切削厚度,對(duì)切削力的影響規(guī)律。仿真與實(shí)驗(yàn)結(jié)果表明,由于加工材料的軟化和斷續(xù)切削,激光超聲復(fù)合輔助加工顯著地降低了切削力,硬質(zhì)合金的切削加工性能得到顯著改善,通過工藝參數(shù)的優(yōu)化,可以實(shí)現(xiàn)硬質(zhì)合金的精密加工。
[Abstract]:In this paper, the cutting characteristics of CBN (cubic boron nitride) cutting tool for the precision machining of cemented carbide material under the condition of laser heating and ultrasonic elliptic vibration composite cutting are studied. The finite element simulation is used to analyze the cemented carbide material in common cutting. The cutting force variation characteristics of one dimensional ultrasonic vibration cutting, ultrasonic elliptical vibration cutting and laser ultrasonic combined cutting are adopted. The auxiliary equipments such as ultra-precision lathe and YAG laser, ultrasonic vibration device developed by ourselves are adopted. The cutting characteristics of laser ultrasonic composite precision machining cemented carbide are studied experimentally. Through a series of comparative experiments, the influence of cutting parameters, such as cutting speed, cutting thickness and cutting force, on the cutting force is analyzed. The simulation and experimental results show that, Due to the softening and intermittent cutting of the machining material, the cutting force is significantly reduced and the cutting performance of the cemented carbide is greatly improved by laser combined ultrasonic assisted machining. The precision machining of the cemented carbide can be realized by optimizing the process parameters.
【作者單位】： 河南理工大學(xué)機(jī)械與動(dòng)力工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51075127)資助
【分類號(hào)】：TG666

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