【摘要】：隨著航空航天、儀器儀表、軍事、醫(yī)療等行業(yè)的飛速發(fā)展,對(duì)淬火處理得到的硬度高,難加工材料的深小孔加工提出了更高要求。本論文在歸納總結(jié)深小孔振動(dòng)鉆削國(guó)內(nèi)外發(fā)展現(xiàn)狀的基礎(chǔ)上,研究了振動(dòng)鉆削的加工機(jī)理,建立了振動(dòng)鉆削的數(shù)學(xué)模型,分析了振動(dòng)鉆削的加工精度、振動(dòng)斷屑機(jī)理、變速切削特性、變角切削特性和鉆頭的靜止化、剛性化效果。從理論上證明了振動(dòng)鉆削與普通鉆削方法相比具有入鉆精度高、斷屑排屑效果好、孔表面加工質(zhì)量好、出口毛刺小、鉆頭使用壽命長(zhǎng)等優(yōu)點(diǎn)。在上述分析的基礎(chǔ)上利用解析法進(jìn)行了高頻軸向振動(dòng)系統(tǒng)的設(shè)計(jì),并用ANSYS-Workbench軟件對(duì)振動(dòng)系統(tǒng)及鉆頭的動(dòng)力學(xué)特性進(jìn)行了仿真分析,完成了振動(dòng)鉆削試驗(yàn)裝置的設(shè)計(jì)。為了研究不同硬度及淬火厚度下的深小孔鉆削規(guī)律,選用45號(hào)鋼制作鉆削試件,對(duì)其進(jìn)行不同硬度和不同淬火深度的表面淬火熱處理,并進(jìn)行振動(dòng)鉆削與普通鉆削的對(duì)比試驗(yàn)。通過(guò)分析鉆削得到孔的上下孔徑差,出口毛刺,孔表面粗糙度和切屑,證明了振動(dòng)鉆削加工的孔具有較小的孔徑差、出口毛刺,較低的孔內(nèi)表面粗糙度和較好的斷屑排屑效果。通過(guò)單因素試驗(yàn)方法進(jìn)行振動(dòng)鉆削對(duì)比試驗(yàn),研究了鉆削材料的硬度、主軸鉆速和進(jìn)給量對(duì)振動(dòng)鉆削孔表面粗糙度和刀具磨損情況的影響規(guī)律,為淬火類(lèi)材料深小孔振動(dòng)鉆削技術(shù)的發(fā)展提供了依據(jù)。
[Abstract]:With the rapid development of aerospace, instrument, military, medical and other industries, higher requirements are put forward for the high hardness of quenched materials and the deep hole processing of hard to be machined materials. On the basis of summing up the development of deep hole vibration drilling at home and abroad, this paper studies the machining mechanism of vibration drilling, establishes the mathematical model of vibration drilling, and analyzes the machining accuracy and vibration chip breaking mechanism of vibration drilling. Variable speed cutting characteristics, variable angle cutting characteristics and bit static, rigidity effect. It is proved theoretically that vibration drilling has the advantages of high drilling precision, good chip cutting effect, good machining quality of hole surface, small outlet burr, long service life of bit, and so on. Based on the above analysis, the high frequency axial vibration system is designed by using the analytical method. The dynamic characteristics of the vibration system and bit are simulated and analyzed by ANSYS-Workbench software, and the design of the vibration drilling test device is completed. In order to study the drilling rule of deep hole with different hardness and quenching thickness, 45 # steel was used to make drilling specimen, surface quenching heat treatment with different hardness and different quenching depth was carried out, and the contrast test between vibration drilling and ordinary drilling was carried out. By analyzing the hole diameter difference, outlet burr, hole surface roughness and chip, it is proved that the hole processed by vibration drilling has smaller aperture difference, lower hole surface roughness and better chip removal effect. The influence of hardness of drilling material, spindle drilling speed and feed rate on the surface roughness and tool wear of the drilling hole is studied by means of the contrast test of vibration drilling with single factor test method, and the effect of drilling material hardness, spindle drilling speed and feed rate on the surface roughness of drilling hole and tool wear is studied. It provides a basis for the development of deep hole vibration drilling technology for quenched materials.
【學(xué)位授予單位】：長(zhǎng)春理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TG52

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本文編號(hào)：2140370