【摘要】：金屬切削是加工機(jī)械零件的基本方法之一,在機(jī)械制造業(yè)中占有十分重要的地位。近年來(lái)隨著“綠色制造”的提出,如何改善刀具切削性能、提高工件表面加工質(zhì)量成為了國(guó)內(nèi)外研究學(xué)者所關(guān)注的熱點(diǎn)。本文將表面織構(gòu)引入切削刀具表面,進(jìn)行了織構(gòu)刀具的設(shè)計(jì)和制造,研究了表面織構(gòu)對(duì)于刀具切削性能、工件表面加工質(zhì)量的影響以及三維形貌表征參數(shù)與織構(gòu)刀具切削性能的相關(guān)性。 采用YLP-F10型光纖激光打標(biāo)機(jī)在YT15刀具的前刀面上進(jìn)行激光微加工,得到兩組表面具有微凹坑陣列的織構(gòu)刀具,通過(guò)控制微凹坑的直徑、深度、面積占有率等參數(shù)使得每組織構(gòu)刀具表面高度算術(shù)平均值Sa相同。使用Talysurf CCI Lite接觸式三維光學(xué)輪廓儀對(duì)織構(gòu)表面進(jìn)行測(cè)量,采用ISO25178參數(shù)對(duì)測(cè)量表面進(jìn)行表征；通過(guò)SL200KS接觸角測(cè)量?jī)x測(cè)量織構(gòu)刀具前刀面濕潤(rùn)性的變化；隨后在配備Kistler9257B型三向測(cè)力儀的CA6140車床上進(jìn)行45#鋼切削試驗(yàn),通過(guò)改變切削速度、進(jìn)給量,研究了不同織構(gòu)對(duì)切削力、前刀面摩擦特性、工件表面粗糙度、切屑形變的影響以及不同切削參數(shù)對(duì)于織構(gòu)刀具切削性能的影響。本研究結(jié)果表明：合理的表面織構(gòu)能夠改善刀具的切削性能；切削液在前刀面鋪展較快的織構(gòu)刀具獲得了較好的切削性能；不同切削參數(shù)條件下,織構(gòu)表面的影響效果也不同；凹坑直徑、深度、面積占有率的協(xié)同作用對(duì)改善刀具切削性能至關(guān)重要,為了協(xié)調(diào)這三個(gè)織構(gòu)參數(shù),可以進(jìn)一步研究三維表征參數(shù)Sku、Ssk、Vvv、Vvc、Sdv、Sda、Spd與刀具切削性能的關(guān)聯(lián)性,為刀具表面設(shè)計(jì)提供了基礎(chǔ)。
[Abstract]:Metal cutting is one of the basic methods of machining mechanical parts and plays an important role in mechanical manufacturing. In recent years, with the development of "green manufacturing", how to improve the cutting performance of cutting tools and improve the quality of workpiece surface has become a hot topic for researchers at home and abroad. In this paper, the surface texture is introduced into the cutting tool surface, and the design and manufacture of the texture cutter are carried out, and the effect of surface texture on the cutting performance of the cutting tool is studied. The influence of machining quality on the workpiece surface and the correlation between the parameters of 3D morphology characterization and the cutting performance of textured cutting tools. Two groups of texture cutters with micropits array were obtained by using YLP-F10 fiber laser marking machine on the front of the YT15 tool. The diameter and depth of the micropits were controlled by controlling the diameter and depth of the micropits. The area occupation ratio and other parameters make the arithmetic mean value of surface height of each group of texture tools Sa the same. The texture surface was measured by Talysurf CCI Lite contact 3D optical profilometer, the surface was characterized by ISO25178 parameters, the change of wettability of tool surface was measured by SL200KS contact angle measuring instrument. After that, the experiment of 4 steel cutting was carried out on the CA6140 lathe equipped with Kistler9257B three-way dynamometer. By changing the cutting speed and feed quantity, the cutting force of different textures, the friction characteristics of the front tool face, the surface roughness of the workpiece were studied. The influence of chip deformation and different cutting parameters on cutting performance of texture cutting tools. The results show that reasonable surface texture can improve the cutting performance of the cutting tool, that the cutting fluid spreads rapidly on the front tool surface to obtain better cutting performance, and that the effect of the texture surface on the cutting parameters is different. The synergy of pit diameter, depth and area occupancy is very important to improve the cutting performance of cutting tools. In order to coordinate these three texture parameters, we can further study the relationship between the three-dimensional characterization parameter Sku,Ssk,Vvv,Vvc,Sdv,Sda,Spd and the cutting performance of the tool. It provides the foundation for tool surface design.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG711;TG174.4

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