本文選題：BTA深孔鉆 + 鉆削力��； 參考：《中北大學(xué)》2015年碩士論文

【摘要】：隨著深孔加工技術(shù)在航空、兵器、冶金等領(lǐng)域的廣泛應(yīng)用，深孔加工的精度及穩(wěn)定性方面的研究受到越來(lái)越多的重視。然而B(niǎo)TA深孔鉆削加工狀態(tài)多樣，機(jī)理復(fù)雜，對(duì)BTA鉆削系統(tǒng)力學(xué)特性及鉆桿穩(wěn)定性的研究成為了深孔加工中的研究熱點(diǎn)和關(guān)鍵問(wèn)題。因此本文將在前人研究基礎(chǔ)上，對(duì)BTA鉆的鉆頭和鉆桿進(jìn)行動(dòng)力學(xué)及穩(wěn)定性研究。 本文首先對(duì)BTA鉆進(jìn)行了受力分析，建立了深孔鉆削的力學(xué)模型，對(duì)BTA深孔鉆削系統(tǒng)中的軸向進(jìn)給力、轉(zhuǎn)矩和功率進(jìn)行了計(jì)算，，并針對(duì)BTA深孔鉆削系統(tǒng)中四種不同類型的導(dǎo)向塊的布置方案及鉆頭的穩(wěn)定度進(jìn)行了計(jì)算。其次用實(shí)例分析了中間齒位角的確定方法，齒后角及中間齒位角對(duì)鉆削力及兩導(dǎo)向塊壓力的影響，錯(cuò)齒鉆的位置角及導(dǎo)向塊的分布對(duì)鉆頭穩(wěn)定度的影響。再次對(duì)BTA鉆在鉆削過(guò)程中鉆桿的渦動(dòng)情況進(jìn)行了分析，對(duì)純滾動(dòng)時(shí)的鉆桿運(yùn)動(dòng)軌跡進(jìn)行了數(shù)學(xué)建模，對(duì)鉆桿的典型渦動(dòng)軌跡進(jìn)行了仿真分析。最后利用達(dá)朗伯原理建立了考慮質(zhì)量偏心、非線性剛度、動(dòng)態(tài)鉆削力及重力的鉆桿非線性運(yùn)動(dòng)軌跡方程，并利用Matlab進(jìn)行了仿真分析。 本文對(duì)BTA鉆頭各刀齒和導(dǎo)向塊角度的取值提供了一定的理論參考，為實(shí)際BTA鉆頭穩(wěn)定性的驗(yàn)證提供了一種方法，同時(shí)研究了鉆桿轉(zhuǎn)速、相對(duì)阻尼以及質(zhì)量偏心對(duì)鉆桿穩(wěn)定性的影響，對(duì)深孔加工技術(shù)的發(fā)展具有重要的現(xiàn)實(shí)意義。
[Abstract]:With the extensive application of deep hole processing technology in the fields of aviation, weapons, metallurgy and other fields, more and more attention has been paid to the research on the precision and stability of deep hole machining. However, the BTA deep hole drilling process is diverse and the mechanism is complex. The research on the mechanical properties of the BTA drilling system and the stability of the drill rod has become a hot topic in the deep hole processing. Therefore, this paper will study the dynamics and stability of drill bit and drill pipe of BTA drill on the basis of previous studies.
In this paper, the force analysis of BTA drill is carried out, the mechanical model of deep hole drilling is set up, the axial feed force, torque and power in the BTA deep hole drilling system are calculated, and the arrangement scheme of four different types of guide blocks and the stability of the bit are calculated for the deep hole drilling system of the deep hole drilling system. The method of determining the angle of the inter tooth position, the influence of the rear angle of the tooth and the angle of the middle tooth on the drilling force and the pressure of the two guide block, the influence of the position angle of the wrong tooth drill and the distribution of the guide block on the stability of the drill bit. Again, the vorticity of the drill rod in the drilling process of BTA drilling is analyzed, and the mathematical modeling of the trajectory of the drill rod in the pure rolling is modeled. The typical vorticity track of the drill rod is simulated and analyzed. Finally, the nonlinear motion trajectory equation of drill rod with mass eccentricity, nonlinear stiffness, dynamic drilling force and gravity is established by using the principle of Da Long Wave, and the simulation analysis is carried out by Matlab.
This paper provides a certain theoretical reference for the value of the angle of the BTA bit and the guide block. It provides a method for the verification of the stability of the actual BTA bit, and studies the influence of the drilling rod speed, relative damping and mass eccentricity on the stability of the drill rod, which has important practical significance for the development of the deep hole processing technique.

【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG52

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