【摘要】：利用切削液流體Reynolds公式和其引起的鉆桿彎曲變形、傾角方程,建立了深孔加工直線度誤差方程,揭示了流體入口壓力、鉆桿轉(zhuǎn)動(dòng)、渦動(dòng)、擠壓與深孔直線度之間的關(guān)系。指出在切削穩(wěn)定狀態(tài)下,減小流體入口壓力,增加鉆桿轉(zhuǎn)速、減小鉆桿渦動(dòng)速度或者減小鉆桿擠壓速度均可改善深孔直線度。設(shè)計(jì)了新型多級(jí)噴射裝置,通過增設(shè)分流腔和噴射級(jí)數(shù)來降低入口壓力,可有效減小深孔直線度誤差。設(shè)計(jì)了擠壓油膜阻尼器(squeeze film dampers,簡稱SFD),利用油膜阻尼力減小深孔鉆桿的渦動(dòng)與擠壓運(yùn)動(dòng),來提高深孔加工直線度。試驗(yàn)了多級(jí)噴射裝置和SFD共同作用下的深孔直線度誤差,驗(yàn)證了鉆桿在較低流體入口壓力、較小渦動(dòng)和擠壓作用下加工的深孔有更好的直線度,為控制深孔加工直線度誤差給出新的思路及設(shè)計(jì)方案。
[Abstract]:Using the Reynolds formula of cutting fluid and the bending deformation and inclination equation of drilling pipe caused by it, the straightness error equation of deep hole machining is established, and the relationship between fluid inlet pressure, drill pipe rotation, vortex, extrusion and the straightness of deep hole is revealed. It is pointed out that under the condition of stable cutting, decreasing the inlet pressure of fluid, increasing the rotation speed of drill pipe, decreasing the speed of drill pipe whirling or reducing the extrusion speed of drill pipe can improve the straightness of deep hole. A new type of multistage injection device is designed, which can reduce the inlet pressure by adding the diffuser cavity and the injection series, which can effectively reduce the straightness error of the deep hole. The squeeze film damper (squeeze film dampers,) is designed to improve the straightness of deep hole processing by reducing the vortex and extrusion motion of the drill pipe by using the oil film damping force. The straightness error of deep hole under the action of multi-stage injection device and SFD is tested. It is proved that the drill pipe has better straightness than the deep hole processed under the action of small vortex and extrusion under the lower inlet pressure of fluid. In order to control the straightness error of deep hole machining, a new idea and design scheme are given.
【作者單位】： 中北大學(xué)機(jī)械與動(dòng)力工程學(xué)院;山西省深孔加工工程技術(shù)研究中心;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51175482) 山西省研究生優(yōu)秀創(chuàng)新資助項(xiàng)目(20133099) 中北大學(xué)研究生科技基金資助項(xiàng)目(20131007)
【分類號(hào)】：TG52

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本文編號(hào)：2396482