本文關(guān)鍵詞：碳纖維復(fù)合材料切削制孔機(jī)理與實(shí)驗(yàn)研究　出處：《中北大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 碳纖維復(fù)合材料 制孔 軸向力 分層缺陷 刀具磨損

【摘要】：碳纖維復(fù)合材料（Carbon Fiber Reinforced Plastic，CFRP）綜合性能突出，具有較高的比剛度和比強(qiáng)度，而且在減振、抗疲勞、耐高溫、可設(shè)計(jì)性方面也優(yōu)異于傳統(tǒng)材料，在航空、航天、國防、汽車等領(lǐng)域擁有著廣泛的應(yīng)用前景。但是碳纖維復(fù)合材料機(jī)械加工難度較大，特別是CFRP應(yīng)用中需要大量的孔加工，因此，研究碳提高纖維復(fù)合材料制孔質(zhì)量具有重要意義。 本文首先闡述了碳纖維復(fù)合材料的國內(nèi)外關(guān)于切削加工、刀具、有限元模擬計(jì)算方法等方面的研究現(xiàn)狀，，總結(jié)了加工中存在的主要缺陷，包括孔的進(jìn)出口撕裂、毛邊、進(jìn)出口分層、孔壁裂紋、孔壁分層、孔壁表面完整性差。 其次，建立了單向碳纖維復(fù)合材料的二元切削模型。當(dāng)纖維方向與切削速度方向一致時(shí)，能形成較高質(zhì)量的表面；而當(dāng)正前角=135°和負(fù)前角0°90°時(shí)，切削形成的表面質(zhì)量較差。對(duì)CFRP的鉆削過程進(jìn)行了分析，并探討了影響切削力的幾個(gè)影響因素及影響方式，以及不同形式的刀具引起分層的臨界軸向力。介紹螺旋銑制孔工藝，分析了螺旋銑切削層形態(tài)。 最后，使用有限元軟件ABAQUS和試驗(yàn)法，研究了不同刀具選用不同切削參數(shù)，對(duì)CFRP進(jìn)行制孔過程中所產(chǎn)生的軸向力、制孔缺陷以及刀具磨損的影響。 結(jié)論顯示，出口處的分層缺陷要明顯比進(jìn)口處顯著，分層缺陷以加工孔的出口缺陷為主，在孔壁上存在微裂紋和分層缺陷；大后角麻花鉆、螺旋銑、臺(tái)階鉆、燭心鉆能夠在一定程度上降低軸向力、抑制進(jìn)出口缺陷產(chǎn)生、減小孔壁分層缺陷，從而提高加工質(zhì)量。軸向力、孔口分層缺陷和孔壁表面粗糙度均隨著進(jìn)給量的增大而增大，隨著主軸轉(zhuǎn)速的增加而降低。并且進(jìn)給量對(duì)軸向力和孔口分層的影響要大于主軸轉(zhuǎn)速，主軸轉(zhuǎn)速對(duì)表面粗糙度的影響要大于進(jìn)給量。硬質(zhì)合金對(duì)CFRP制孔中的主要缺陷為磨粒磨損、崩刃以及切屑粘附。
[Abstract]:Carbon fiber composite (Carbon Fiber Reinforced Plastic, CFRP) comprehensive performance is outstanding, has high specific stiffness and strength, but also in vibration, anti fatigue, high temperature resistant, can be designed is superior to traditional materials, in aviation, aerospace, defense, automotive and other fields have a wide application prospect. But the carbon fiber composite machining is difficult, especially in the application of CFRP need to be processed, a series of holes so the research has important significance to improve carbon fiber composite drilling quality.
This paper first describes the carbon fiber composite materials at home and abroad on the cutting tool, the current situation of research on finite element simulation method, summarizes the main defects existing in the processing of import and export, including hole tear, burr, import and export of stratification, hole wall crack, hole wall stratification, hole wall surface integrity is poor.
Secondly, the establishment of two yuan of cutting model of unidirectional carbon fiber composites. When the fiber direction and cutting speed in the same direction, the surface can form high quality; and when the positive rake angle of =135 degrees and negative rake angle is 0 degrees 90 degrees, the cutting surface quality is not formed. The drilling process in CFRP analyzes and discusses some influence of cutting force and influence factors, the critical axial force and tool in different forms. The delamination spiral milling drilling technology, analysis of the helical milling cutting layer shape.
Finally, using finite element software ABAQUS and experimental method, the effects of different cutting parameters on the axial force, hole defect and tool wear during CFRP drilling are studied.
The conclusion shows that the outlet of the delamination defects than the entrance to exit defects significantly, delamination holes, micro cracks and delamination defects in the hole on the wall; after the angle of twist drill, spiral milling, step drill, drill wick can reduce the axial force in a certain extent, inhibit the import and export of defects the hole wall, reduce the delamination defect, so as to improve the machining quality. The axial force, orifice delamination defects and pore wall surface roughness increases with the increase of the amount of feed, reduce with the increase of spindle speed and feed rate. And the influence on the axial force and the orifice layer is greater than the spindle speed, spindle speed on surface roughness the effect is greater than the feed. The main defects of CFRP hard alloy drilling system for abrasive wear, chipping and chip adhesion.

【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)】：TQ342.74;TB33

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 張毅;;超聲振動(dòng)銑削碳纖維復(fù)合材料刀具磨損研究[J];精密制造與自動(dòng)化;2010年02期

相關(guān)博士學(xué)位論文 前3條

1 李桂玉;疊層復(fù)合材料鉆削加工缺陷產(chǎn)生機(jī)理及工藝參數(shù)優(yōu)化[D];山東大學(xué);2011年

2 鮑永杰;C/E復(fù)合材料制孔缺陷成因與高效制孔技術(shù)[D];大連理工大學(xué);2010年

3 張煥俠;碳纖維表面和界面性能研究及評(píng)價(jià)[D];東華大學(xué);2014年

本文編號(hào)：1402428