当前位置: X-MOL 学术Adv. Manuf. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Experimental study on the meso-scale milling of tungsten carbide WC-17.5Co with PCD end mills
Advances in Manufacturing ( IF 5.2 ) Pub Date : 2020-04-13 , DOI: 10.1007/s40436-020-00298-y
Wei Zhao , Asif Iqbal , Ding Fang , Ning He , Qi Yang

Tungsten carbide is a material that is very difficult to cut, mainly owing to its extreme wear resistance. Its high value of yield strength, accompanied by extreme brittleness, renders its machinability extremely poor, with most tools failing. Even when cutting with tool materials of the highest quality, its mode of cutting is mainly brittle and marred by material cracking. The ductile mode of cutting is possible only at micro levels of depth of cut and feed rate. This study aims to investigate the possibility of milling the carbide material at a meso-scale using polycrystalline diamond (PCD) end mills. A series of end milling experiments were performed to study the effects of cutting speed, feed per tooth, and axial depth of cut on performance measures such as cutting forces, surface roughness, and tool wear. To characterize the wear of PCD tools, a new approach to measuring the level of damage sustained by the faces of the cutter’s teeth is presented. Analyses of the experimental data show that the effects of all the cutting parameters on the three performance measures are significant. The major damage mode of the PCD end mills is found to be the intermittent micro-chipping. The progress of tool damage saw a long, stable, and steady period sandwiched between two short, abrupt, and intermittent periods. Cutting forces and surface roughness are found to rise with increments in the three cutting parameters, although the latter shows signs of reduction during the initial increase in cutting speed only. The results of this study find that an acceptable surface quality (average roughness \(R_{\text{a}} < 0.2\,\upmu{\text{m}}\)) and tool life (cutting length \(L > 600\,{\text{mm}}\)) can be obtained under the conditions of the given cutting parameters. It indicates that milling with PCD tools at a meso-scale is a suitable machining method for tungsten carbides.

中文翻译:

PCD立铣刀细化碳化钨WC-17.5Co的实验研究

碳化钨是一种很难切割的材料,主要是由于其极高的耐磨性。它的高屈服强度值以及极高的脆性使其可加工性极差,大多数工具都无法使用。即使使用最高质量的工具材料进行切割,其切割方式也主要是脆性的并且会因材料开裂而受损。延性切削模式只有在切削深度和进给速度的微小水平下才可能。这项研究旨在研究使用多晶金刚石(PCD)立铣刀以中观规模铣削碳化物材料的可能性。进行了一系列立铣刀实验,以研究切削速度,每齿进给量和切削轴向深度对性能指标(例如切削力,表面粗糙度和刀具磨损)的影响。为了表征PCD工具的磨损,提出了一种测量刀具齿面承受的损坏程度的新方法。对实验数据的分析表明,所有切削参数对这三种性能指标的影响都很大。发现PCD立铣刀的主要损坏方式是断续的微切屑。刀具损坏的进度是一个较长,稳定和稳定的时期,介于两个短暂,间歇和间歇的时期之间。发现切削力和表面粗糙度随着三个切削参数的增加而增加,尽管后者仅在切削速度的初始增加期间显示出减小的迹象。这项研究的结果发现,可接受的表面质量(平均粗糙度 对实验数据的分析表明,所有切削参数对这三种性能指标的影响都很大。发现PCD立铣刀的主要损坏方式是断续的微切屑。刀具损坏的进度是一个较长,稳定和稳定的时期,介于两个短暂,间歇和间歇的时期之间。发现切削力和表面粗糙度随着三个切削参数的增加而增加,尽管后者仅在切削速度的初始增加期间显示出减小的迹象。这项研究的结果发现,可接受的表面质量(平均粗糙度 对实验数据的分析表明,所有切削参数对这三种性能指标的影响都很大。发现PCD立铣刀的主要损坏模式是断续的微切屑。刀具损坏的进度是一个较长,稳定和稳定的时期,介于两个短暂,间歇和间歇的时期之间。发现切削力和表面粗糙度随着三个切削参数的增加而增加,尽管后者仅在切削速度的初始增加期间显示出减小的迹象。这项研究的结果发现,可接受的表面质量(平均粗糙度 发现PCD立铣刀的主要损坏方式是断续的微切屑。刀具损坏的进度是一个较长,稳定和稳定的时期,介于两个短暂,间歇和间歇的时期之间。发现切削力和表面粗糙度随着三个切削参数的增加而增加,尽管后者仅在切削速度的初始增加期间显示出减小的迹象。这项研究的结果发现,可接受的表面质量(平均粗糙度 发现PCD立铣刀的主要损坏方式是断续的微切屑。刀具损坏的进度是一个较长,稳定和稳定的时期,介于两个短暂,间歇和间歇的时期之间。发现切削力和表面粗糙度随着三个切削参数的增加而增加,尽管后者仅在切削速度的初始增加期间显示出减小的迹象。这项研究的结果发现,可接受的表面质量(平均粗糙度\(R _ {\ text {a}} <0.2 \,\ upmu {\ text {m}} \\))和工具寿命(切割长度\(L> 600 \,{\ text {mm}} \))可以在给定切削参数的条件下获得。这表明用PCD刀具进行中等尺寸的铣削是适用于碳化钨的加工方法。
更新日期:2020-04-13
down
wechat
bug