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首页> 外文期刊>International journal of automation technology >Cutting Characteristics of Direct Milling of Cemented Tungsten Carbides Using Diamond-Coated Carbide End Mills with Untreated and Treated Cutting Edge
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Cutting Characteristics of Direct Milling of Cemented Tungsten Carbides Using Diamond-Coated Carbide End Mills with Untreated and Treated Cutting Edge

机译：使用未经处理和处理过的切削刃的金刚石涂层硬质合金立铣刀直接铣削硬质合金硬质合金的切削特性

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摘要

This study investigates the cutting characteristics of direct milling of cemented tungsten carbides performed using a diamond-coated carbide end mill. The diamond-coated carbide end mills have cutting edges that are both treated and untreated, and the sharp cutting edge can be developed at the ridgeline of the diamond coating on the flank face via treatment of the cutting edge. Two types of cemented tungsten carbide were used as workpiece materials, i.e., TAS VM-40 and VC-70. The influence of the cutting length on the cutting characteristics was also studied. In the case of cutting of the VM-40, the cutting force of the treated tool was significantly lower than that of the untreated tool. The cutting forces of both tools were observed to be similar after the diamond coating on the rake face of the untreated tool was flaked. The cutting edge at the ridgeline of the diamond coating on the flank face of both tools was retreated during the cutting progress, and the thickness of the diamond coating of the untreated tool was also decreased. The finished surface integrity was drastically altered owing to the flaking of the diamond coating on the rake face of the untreated tool and the irregularity of the cutting edge of both tools. The accuracy of the machined shape obtained by using the treated tool was better than that obtained using the untreated tool, and the tendency was significantly observed as the cutting progressed. In the case of cutting of VC-70, flaking of the diamond coating of untreated tool did not occur, and the cutting force of the treated tool was significantly lower than that of the untreated one. The cutting edge of the treated tool was maintained sharp up to a groove length of 500 mm, although the workpiece material was clearly observed to be adhering to the round corner of the cutting edge of the untreated tool. Moreover, the accuracy of the shape of the machined groove obtained using the treated tool was better than that obtained using the untreated tool.
机译：本研究调查了使用金刚石涂层硬质合金立铣刀直接铣削硬质合金的切削特性。金刚石涂层的硬质合金立铣刀具有经过处理和未经处理的切削刃，通过对切削刃进行处理，可以在侧面的金刚石涂层棱线上形成锋利的切削刃。两种类型的硬质合金碳化钨被用作工件材料，即TAS VM-40和VC-70。还研究了切削长度对切削性能的影响。在切削VM-40的情况下，已处理工具的切削力明显低于未处理工具的切削力。在未处理的刀具前刀面的金刚石涂层剥落之后，观察到两种刀具的切削力相似。在切削过程中，两个工具的侧面上的金刚石涂层的棱线处的切削刃都被后退，并且未处理的工具的金刚石涂层的厚度也减小了。由于未处理刀具前刀面上的金刚石涂层剥落以及两个刀具的切削刃不规则，最终的表面完整性发生了巨大变化。通过使用处理过的工具获得的加工形状的精度优于使用未处理过的工具获得的加工形状的精度，并且随着切削的进行，这种趋势被明显观察到。在切割VC-70的情况下，未处理的工具的金刚石涂层未发生剥落，并且处理后的工具的切削力明显低于未处理的工具。尽管可以清楚地观察到工件材料粘附在未处理工具的切削刃的圆角上，但处理过的工具的切削刃仍保持锐利直至500 mm的凹槽长度。而且，使用处理过的工具所获得的加工槽的形状的精度优于使用未处理的工具所获得的加工槽的形状的精度。

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