Experimental Investigation on Direct Micro Milling of Cemented Carbide

Wu, Xian; Li, Liang; He, Ning; Zhao, Guolong; Shen, Jianyun

doi:10.3390/mi10020147

Cited by 14 publications

(6 citation statements)

References 32 publications

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“…The minimum uncut chip thickness for both materials was found in the range of 4 to 6 µmm and correlates well with the r β /t c of 0.3, which is characteristic of di↵erent other brittle materials such hardened alloys and steels. Wu et al [24] machined WC-15Co with a Polycrystalline Diamond (PCD) micro end mill and they revealed that the t c , of this material is 1.49 µm for the tested cutting conditions. Brittle cracks and micro pits emerged (the latter due to the pull out of broken WC grains) during brittle cutting mode.…”

Section: Introductionmentioning

confidence: 99%

Investigation on micro milling of cemented carbide with ball nose and corner radius diamond coated end mills

Figueiredo,

Silva,

Silva

et al. 2023

Preprint

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Micro milling of cemented carbides is a challenging task due to their high hardness, low toughness and high wear resistance. Ensuring good surface quality and dimensional accuracy is crucial for extending parts service life, which in turn enhances economical and environmental sustainability. This paper is mainly focused on evaluating surface formation mechanisms, scale effects, fracture behaviour and chip formation using distinct cemented carbide micro milling tools with multi layer diamond HF-CVD. In order to achieve higher precision and more efficient micro milling operations on WC-15Co and WC-10Co, a systematic experimental approach has been carried out. The influence of cutting parameters, achievable surface quality and defects occurrence were thoroughly examined. Experimental results evidence the influence of operational conditions on the chip formation of cemented carbides as well as an important impact of the utilized cutting tool. Micro pits, cracks, thin ploughing layer and fractured workpiece edges are amongst the observed surface damage mechanisms. A ductile cutting regime of the high-hardness composite material is confirmed, exhibited by the plastic deformation even when small depths of cut are considered.

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Section: Introductionmentioning

confidence: 99%

Investigation on micro milling of cemented carbide with ball nose and corner radius diamond coated end mills

Figueiredo,

Silva,

Silva

et al. 2023

Preprint

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“…First, cemented carbides are expensive materials, which make it difficult to manufacture cost-effective jigs [1]. Second, when costs become the primary concern, the mechanical properties of cemented carbides tend to deteriorate [2]. Utilizing a tool steel for a majority of jig components has emerged as a promising strategy to address these issues.…”

Section: Introductionmentioning

confidence: 99%

Temperature Evaluation of Cladding Beads and the Surrounding Area during the Laser Metal Deposition Process

Yamashita,

Ilman,

Kunimine

et al. 2023

JMMP

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Cracks usually generate during the formation of beads composed of a WC-12mass%Co cemented carbide by the laser metal deposition (LMD). Measuring temperatures of the formed bead and substrate during the LMD process is important for realizing crack-free beads. In this study, temperatures of the substrate around the formed bead during the LMD process were measured using a thermoviewer. Temperatures of the formed beads during the LMD process were predicted by simulation based on the thermal conduction analysis using the experimentally measured temperatures of the substrate. The experimental results obtained during forming the WC-12mass%Co cemented carbide beads on JIS SKH51 (ISO HS-6-5-2) substrates showed that the maximal temperatures of the substrates at 0.2 mm away from the center of the formed beads ranged from 229 °C to 341 °C at laser powers ranging from 80 W to 160 W. The predicted maximal temperatures of the formed beads were in the range of 2433 °C to 4491 °C in the simulation using a laser absorption coefficient of 0.35 for the substrate. Validity of these simulation results was discussed based on the melting point of the substrate and microstructures of the formed WC-12mass%Co cemented carbide beads.

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“…Surface quality and tool wear are important for the machined product function and factors greatly influencing the manufacturing cost [ 4 ]. In micro-milling, the surface quality and the milling force have drawn much attention from researchers because the quality of the workpiece surface (such as burrs [ 5 ] and roughness) is directly related to whether the workpiece can be used.…”

Section: Introductionmentioning

confidence: 99%

Force Prediction and Cutting-Parameter Optimization in Micro-Milling Al7075-T6 Based on Response Surface Method

2020

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Optimization of cutting parameters in micro-milling is an important measure to improve surface quality and machining efficiency of the workpiece. Investigation of micro-milling forces prediction plays a positive role in improving machining capacity. To predict micro-milling forces and optimize micro-milling cutting parameters (per-feed tooth (fz), axial cutting depth (ap), spindle speed (n) and tool extended length (l)), a rotatable center composite experiment of micro-milling straight micro-groove in the workpiece of Al7075-T6 were designed, based on second-order response surface methods. According to the experiment results, the least square method was used to estimate the regression coefficient corresponding to the cutting parameters. Simultaneously, the response prediction model of micro-milling was established and successfully coincide the predicted values with the experiment values. The significance of the regression equation was tested by analysis of variance, and the influence of micro-milling cutting parameters on force and top burrs morphology was studied. The experiment results show that in a specific range of cutting parameters, ap and fz have a significant linear relation with the micro-milling force and the top burrs width. According to the optimal response value, the optimized cutting parameters for micro-milling obtained as: n is 11,393 r/min, fz is 6 µm/z, ap is 11 μm and l is 20.8 mm. The research results provide a useful reference for the selection of cutting parameters for micro-milling.

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Experimental Investigation on Direct Micro Milling of Cemented Carbide

Cited by 14 publications

References 32 publications

Investigation on micro milling of cemented carbide with ball nose and corner radius diamond coated end mills

Investigation on micro milling of cemented carbide with ball nose and corner radius diamond coated end mills

Temperature Evaluation of Cladding Beads and the Surrounding Area during the Laser Metal Deposition Process

Force Prediction and Cutting-Parameter Optimization in Micro-Milling Al7075-T6 Based on Response Surface Method

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