Surface analysis of WC-5%Co cemented tungsten carbide cutting insert after plunge-face grinding

Cruz, Dennis Coelho; Sordi, Vitor Luiz; Ventura, Carlos Eiji Hirata

doi:10.1007/s00170-020-05382-y

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…At the same time, there is greater uniformity in Ra and greater variability in Rz . By definition, Rz is more sensitive to the detection of imperfections in the machined surface; therefore, it is widely used for the control and monitoring of surface irregularities [ 25 , 26 , 27 ]. However, the Rz values obtained by drag finishing are lower or equal to those originally obtained in the manufacture of cutting tools by grinding operation [ 25 , 26 ].…”

Section: Resultsmentioning

confidence: 99%

“…By definition, Rz is more sensitive to the detection of imperfections in the machined surface; therefore, it is widely used for the control and monitoring of surface irregularities [ 25 , 26 , 27 ]. However, the Rz values obtained by drag finishing are lower or equal to those originally obtained in the manufacture of cutting tools by grinding operation [ 25 , 26 ]. Considering the effect produced by the percentage of SiC in the abrasive mixture ( Figure 12 a), it can be observed that lower SiC content allows for achieving a higher Rz compared to the higher inclusion of SiC in the mixture.…”

Section: Resultsmentioning

confidence: 99%

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Estimation of Drag Finishing Abrasive Effect for Cutting Edge Preparation in Broaching Tool

2022

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In recent years, cutting edge preparation became a topic of high interest in the manufacturing industry because of the important role it plays in the performance of the cutting tool. This paper describes the use of the drag finishing DF cutting edge preparation process on the cutting tool for the broaching process. The main process parameters were manipulated and analyzed, as well as their influence on the cutting edge rounding, material remove rate MRR, and surface quality/roughness (Ra, Rz). In parallel, a repeatability and reproducibility R&R analysis and cutting edge radius re prediction were performed using machine learning by an artificial neural network ANN. The results achieved indicate that the influencing factors on re, MRR, and roughness, in order of importance, are drag depth, drag time, mixing percentage, and grain size, respectively. The reproducibility accuracy of re is reliable compared to traditional processes, such as brushing and blasting. The prediction accuracy of the re of preparation with ANN is observed in the low training and prediction errors 1.22% and 0.77%, respectively, evidencing the effectiveness of the algorithm. Finally, it is demonstrated that the DF has reliable feasibility in the application of edge preparation on broaching tools under controlled conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Estimation of Drag Finishing Abrasive Effect for Cutting Edge Preparation in Broaching Tool

2022

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“…Bifano et al (1991) afirmam que a remoção de material de maneira dúctil, com a consequente melhora da qualidade superficial, é possível em materiais frágeis, desde que certa espessura crítica de cavaco em cada grão abrasivo não seja ultrapassada. Com base no modelo de Friemuth (1999), Cruz et al (2020) propõem que a espessura média de cavaco por grão hcu na retificação plana transversal de mergulho, utilizada para acabamento de insertos de corte, seja calculada pela Equação 1, com auxílio da Equação 2.…”

Section: Materiais E Métodosunclassified

Investigação Dos Mecanismos De Remoção De Material Na Retificação De Insertos De Corte

Silva¹

2021

Anais - V Workshop De Pesquisa Em Manufatura

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“…Several investigations on the effect of diamond abrasives on cemented carbide coatings have reported degradation issues. Common features include the formation of fracture surfaces (Figure 12) consisting of grain pull-out, fragmentation of metal grains, plastic deformation of WC grains and smearing of cobalt binder [18,21]. Maiti et al found that grinding of WC-CoCr-based HVOF cemented carbide coating with a diamond abrasive wheel resulted in a surface hardness increase of 33% due to induced residual stresses on the workpiece [22].…”

Section: Selection Of Abrasives For Grinding Of Wcmentioning

confidence: 99%

“…More advanced techniques are considered which are more innovative and have the potential of addressing stringent geometrical and finishing requirements. The main considerations when assessing the suitability of a machining or finishing process include the modification effects of processes on the surface of the coating manifested in the form of coating-deposition defects, induced residual stresses, formation of micro-cracks, plastic deformation, and the fragmentation of WC grains; these defects and failures are discussed [21][22][23]. Common root causes to such failures commonly involve the presence of high frictional forces and in the case of cemented carbide coatings, their inhomogeneous structure resulting in selective material removal.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Precision Machining and Surface Finishing of Tungsten Carbide Hard Composite Coatings

Micallef

Zhuk²,

Aria

2020

Coatings

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Owing to their high hardness, fracture toughness and oxidation resistance, tungsten carbide (WC) coatings are extensively deposited on parts that operate in demanding applications, necessitating wear, erosion, and corrosion resistance. The application of thick and hard WC coatings has an inevitable effect on the original dimensions of the parts, affecting the geometrical tolerances and surface roughness. The capability of achieving a sub-micron surface finish and adhere to tight geometrical tolerances accurately and repeatably is an important requirement, particularly with components that operate in high-precision sliding motion. Meeting such requirements through conventional surface finishing methods, however, can be challenging due to the superior mechanical and tribological properties of WC coatings. A brief review into the synthesis techniques of cemented and binderless WC coatings is presented together with a comprehensive review into the available techniques which are used to surface finish WC-based coatings with reference to their fundamental mechanisms and capabilities to process parts with intricate and internal features. The binderless WC/W coating considered in this work is deposited through chemical vapour deposition (CVD) and unlike traditional cemented carbide coatings, it has a homogenous coating structure. This distinctive characteristic has the potential of eliminating key issues commonly encountered with machining and finishing of WC-based coatings. Here, six contact and non-contact surface finishing techniques, include diamond turning, precision grinding, superfinishing, vibratory polishing, electrical discharge machining, and electropolishing are discussed along with their current use in industry and limitations. Key challenges in the field are highlighted and potential directions for future investigation, particularly on binderless WC coatings, are proposed herein.

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Surface analysis of WC-5%Co cemented tungsten carbide cutting insert after plunge-face grinding

Cited by 13 publications

References 16 publications

Estimation of Drag Finishing Abrasive Effect for Cutting Edge Preparation in Broaching Tool

Estimation of Drag Finishing Abrasive Effect for Cutting Edge Preparation in Broaching Tool

Investigação Dos Mecanismos De Remoção De Material Na Retificação De Insertos De Corte

Recent Progress in Precision Machining and Surface Finishing of Tungsten Carbide Hard Composite Coatings

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