發(fā)布時(shí)間：2019-05-10 00:15

【摘要】：為了實(shí)現(xiàn)硬質(zhì)合金的延性域加工,研究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)合金進(jìn)行精密加工的切削特性。分析硬質(zhì)合金在普通切削、超聲橢圓振動(dòng)切削與激光超聲復(fù)合切削三種切削方式下的切削力變化特征,建立激光超聲復(fù)合切削的切削力理論模型,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,試驗(yàn)研究激光超聲復(fù)合精密加工硬質(zhì)合金的切削特性。通過(guò)一系列的對(duì)比試驗(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。理論模型與試驗(yàn)結(jié)果表明,由于硬質(zhì)合金的軟化和斷續(xù)切削,使得激光超聲復(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(guò)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 order to realize the ductile domain machining of cemented carbide, the cutting characteristics of cemented carbide were studied by using CBN (cubic boron nitride) tool under the condition of laser heating and ultrasonic elliptical vibration. The cutting force variation characteristics of cemented carbide in common cutting, ultrasonic elliptical vibration cutting and laser ultrasonic combined cutting are analyzed. The theoretical model of cutting force of laser ultrasonic composite cutting is established. The ultra-precision lathe and YAG laser are adopted. The cutting characteristics of laser ultrasonic composite precision machining of cemented carbide were studied by self-developed ultrasonic vibration device and other auxiliary equipment. Through a series of comparative tests, the influence of cutting parameters, such as cutting speed and cutting thickness, on cutting force is analyzed. The theoretical model and experimental results show that laser ultrasonic composite machining can reduce the cutting force significantly because of the softening and intermittent cutting of cemented carbide, and the cutting performance of cemented carbide has been improved remarkably, through the optimization of technological parameters, the cutting force of cemented carbide has been improved greatly, and the cutting performance of cemented carbide has been improved. The precision machining of cemented carbide can be realized.
【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)基金資助項(xiàng)目(51075127)
【分類號(hào)】：TG135.5;TG66

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本文編號(hào)：2473200