【摘要】：針對難加工材料鈦合金在采用普通麻花鉆傳統(tǒng)鉆削過程中存在鉆削力和扭矩較大使得鉆孔困難,刀具使用壽命低,連續(xù)長切屑易纏繞刀具、劃傷孔加工表面、增大刀具-切屑-工件孔壁之間的摩擦以及排屑差引起堵屑和卡刀具的問題,引入一種新刃型刀具(即八面鉆),并結(jié)合超聲振動鉆削技術(shù),進行了鈦合金旋轉(zhuǎn)超聲輔助鉆削試驗。分析了旋轉(zhuǎn)超聲輔助鉆削和普通鉆削中切屑形成原理,采用文中所設(shè)計的旋轉(zhuǎn)超聲振動鉆削主軸結(jié)合BV100立式加工中心平臺、測力系統(tǒng)和非接觸激光測量系統(tǒng)進行了無冷卻條件下基于八面鉆的鈦合金旋轉(zhuǎn)超聲輔助鉆削和普通鉆削試驗以及鉆削力、扭矩和切屑形態(tài)的研究。試驗結(jié)果表明:相比于普通鉆削,超聲鉆削明顯降低鉆削力和扭矩分別為19.07%~20.09%和31.66%~34.3%,明顯增強了鉆頭橫刃和主切削刃的切削能力,獲得了良好的斷屑和排屑效果,提高了切削過程的穩(wěn)定性,能夠極大改善鈦合金鉆孔過程鉆削困難、刀具使用壽命低和孔加工質(zhì)量差的問題。
[Abstract]:In order to solve the problems that the drilling force and torque of titanium alloy are large in the traditional drilling process of common twist drill, the service life of the tool is low, the continuous long chip is easy to wound the tool, the hole surface is scratched, the friction between the tool, chip and workpiece hole wall is increased, and the chip blockage and clamping tool are increased, a new cutting tool (that is, octagonal drilling) is introduced, and the ultrasonic vibration drilling technology is combined with the cutting tool. The rotating ultrasonic assisted drilling test of titanium alloy was carried out. The principle of chip formation in rotating ultrasonic assisted drilling and ordinary drilling is analyzed. The rotating ultrasonic vibration drilling spindle combined with BV100 vertical machining center platform, force measurement system and non-contact laser measurement system are used to study the rotating ultrasonic assisted drilling and common drilling tests of titanium alloy based on octagonal drilling without cooling, as well as the drilling force, torque and chip morphology. The experimental results show that compared with ordinary drilling, ultrasonic drilling obviously reduces drilling force and torque by 19.07% 鈮，

本文編號：2506797