【摘要】：鉆削加工過(guò)程中,機(jī)床振動(dòng)會(huì)導(dǎo)致鉆尖在接觸工件瞬間偏離主軸中心,從而引發(fā)鉆刃刀尖在軸向發(fā)生偏擺現(xiàn)象。該現(xiàn)象會(huì)加劇鉆頭磨損,影響孔加工質(zhì)量,嚴(yán)重時(shí)甚至?xí)霈F(xiàn)喇叭孔。針對(duì)該現(xiàn)象,本文基于MATLAB建立鉆刃刀尖軸向偏擺力學(xué)模型,通過(guò)DEFORM有限元軟件對(duì)鉆刃刀尖軸向偏擺運(yùn)動(dòng)過(guò)程進(jìn)行仿真,同時(shí)結(jié)合鉆刃刀尖軸向偏擺力學(xué)實(shí)驗(yàn),開(kāi)展不同偏擺角度對(duì)鉆削加工影響的研究。本文主要研究?jī)?nèi)容如下:(1)鉆刃刀尖軸向偏擺力學(xué)模型的建立。基于切削加工中切屑形成過(guò)程及切削溫度變化情況,建立直角及斜角切削力學(xué)模型;基于麻花鉆鉆削原理分析鉆刃刀尖軸向偏擺發(fā)生時(shí)的受力情況,從斜角切削推導(dǎo)出鉆削力學(xué)模型,結(jié)合MATLAB分析不同加工參數(shù)對(duì)鉆削力影響規(guī)律。(2)鉆刃刀尖軸向偏擺的有限元仿真分析。建立鉆削加工過(guò)程有限元模型,利用DEFORM有限元仿真分析軟件對(duì)鉆刃刀尖不同角度的軸向偏擺進(jìn)行模擬,對(duì)比分析鉆刃刀尖不同角度時(shí)的鉆頭溫度場(chǎng)、鉆頭應(yīng)力應(yīng)變場(chǎng)、切屑溫度場(chǎng)、切屑形態(tài)等仿真結(jié)果,為后續(xù)進(jìn)行鉆刃刀尖軸向偏擺實(shí)驗(yàn)提供指導(dǎo)。(3)鉆刃刀尖軸向偏擺實(shí)驗(yàn)驗(yàn)證。針對(duì)不同的軸向偏擺角度建立鉆刃刀尖軸向偏擺實(shí)驗(yàn)平臺(tái),通過(guò)實(shí)驗(yàn)測(cè)量鉆頭溫度、鉆削力及扭矩并與仿真數(shù)據(jù)進(jìn)行對(duì)比分析驗(yàn)證;同時(shí)測(cè)量切屑長(zhǎng)短、孔的鉆入鉆出端直徑差以及孔表面粗糙度,分析鉆刃刀尖在軸向的偏擺對(duì)切屑以及孔的影響。理論分析與實(shí)驗(yàn)結(jié)果表明,采用上述研究方法,本文建立了鉆刃刀尖軸向偏擺力學(xué)模型,仿真與實(shí)驗(yàn)結(jié)果真實(shí)預(yù)測(cè)了鉆刃刀尖軸向偏擺時(shí)鉆頭及切屑的物理狀態(tài),得到了鉆刃刀尖軸向偏擺不同角度對(duì)鉆削加工的影響規(guī)律,為深入研究鉆刃刀尖軸向偏擺現(xiàn)象提供新的方法。在揭示鉆削過(guò)程的本質(zhì),制定合理的切削加工工藝,提高孔加工表面質(zhì)量,降低鉆頭磨損提高鉆頭壽命等方面具有重要意義。
[Abstract]:During the drilling process, the vibration of the machine tool will cause the drill tip to deviate from the center of the spindle at the moment of contact with the workpiece, thus causing the tip of the drill edge to deflect in the axial direction. This phenomenon will aggravate bit wear, affect hole processing quality, and even appear horn holes when serious. Aiming at this phenomenon, based on MATLAB, this paper establishes a mechanical model of axial deflection of drill blade tip, simulates the movement process of edge axial deflection of drill edge by DEFORM finite element software, and combines with the mechanical experiment of drill blade tip axial deflection. The influence of different deflection angles on drilling machining was studied. The main contents of this paper are as follows: (1) the establishment of the axial deflection model of the drill blade tip. Based on the process of chip formation and the change of cutting temperature in cutting process, a right-angle and diagonal cutting force model is established, and the stress on the axial deflection of the cutting edge is analyzed based on the principle of twist drilling. The drilling mechanics model is derived from oblique angle cutting, and the influence of different machining parameters on drilling force is analyzed by MATLAB. (2) the finite element simulation analysis of the axial deflection of the cutting edge. The finite element model of drilling process is established, and the axial deflection at different angles of cutting edge is simulated by using DEFORM software. The temperature field and stress strain field of drill bit at different angles of drill edge are compared and analyzed. The simulation results of chip temperature field and chip shape provide guidance for the following experiments. (3) the experimental verification of the tip axial deflection of the drill edge. Aiming at different axial deflection angles, an experimental platform is set up to measure bit temperature, drilling force and torque, and to compare with simulation data, and to measure chip length at the same time. The diameter difference and surface roughness of the hole are analyzed. The influence of the tip of the drill edge on the chip and the hole is analyzed. The theoretical analysis and experimental results show that the mechanical model of the axial deflection of the cutting edge is established by using the above research method, and the physical state of the bit and chip during the axial deflection of the drill edge is predicted by the simulation and experimental results. The influence of different angles on drilling machining is obtained, which provides a new method for the further study of the axial deflection of drill edge. It is of great significance to reveal the essence of drilling process, to formulate reasonable cutting technology, to improve the surface quality of hole machining, and to reduce bit wear and increase bit life.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TG52

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 田大可;徐雪;劉旭陽(yáng);張德志;;航空發(fā)動(dòng)機(jī)低壓渦輪軸結(jié)構(gòu)參數(shù)建模與分析[J];航空發(fā)動(dòng)機(jī);2015年05期

2 張龍新;王松濤;阮國(guó)輝;劉勛;王仲奇;;超聲速低反力度吸附式壓氣機(jī)變工況特性[J];航空動(dòng)力學(xué)報(bào);2015年04期

3 朱紅霞;沈興全;張利新;;準(zhǔn)干式深孔鉆削中溫度場(chǎng)與刀具磨損的仿真研究[J];機(jī)械設(shè)計(jì)與制造;2014年02期

4 馮朝輝;張學(xué)忱;;小直徑鉆頭鉆削加工的有限元仿真分析[J];長(zhǎng)春大學(xué)學(xué)報(bào);2013年12期

5 鮑永杰;高航;梁延德;朱國(guó)平;;碳纖維/環(huán)氧樹(shù)脂復(fù)合材料鉆削溫度場(chǎng)建模與試驗(yàn)[J];兵工學(xué)報(bào);2013年07期

6 李道波;王彪;李建;付力;;基于Deform-3D準(zhǔn)干式深孔BTA刀具鉆削的仿真研究[J];工具技術(shù);2012年09期

7 熊雋;;高精度零件加工方法探析[J];機(jī)床與液壓;2012年16期

8 周友行;郭輝;何奇;楊湘軍;;基于有限元的麻花鉆鉆孔過(guò)程研究[J];湘潭大學(xué)自然科學(xué)學(xué)報(bào);2012年01期

9 應(yīng)正健;周利平;王繼森;劉利江;;淺孔鉆鉆削過(guò)程中的有限元?jiǎng)討B(tài)仿真[J];工具技術(shù);2011年10期

10 閆明鵬;邵華;;超聲振動(dòng)鉆削鈦合金的刀具溫度和磨損分析[J];工具技術(shù);2011年08期

相關(guān)碩士學(xué)位論文 前3條

1 劉利江;基于DEFORM可轉(zhuǎn)位淺孔鉆的有限元仿真[D];西華大學(xué);2011年

2 王磊;軸向振動(dòng)鉆削機(jī)理及進(jìn)給方向毛刺形成與控制技術(shù)研究[D];江蘇大學(xué);2008年

3 郝興高;基于有限元的麻花鉆加工精度分析[D];西安電子科技大學(xué);2007年

，

本文編號(hào)：2223297