Analysis of the metallography parameters and residual stress induced when producing bolt holes in Inconel 718 alloy

Vrabeľ, Marek; Eckstein, Martin; Maňková, Ildikó

doi:10.1007/s00170-018-1902-4

Cited by 8 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To achieve these ends, it is necessary to have important knowledge of each machining technology, realize the research and development in the field of machine–tool–workpiece–fixture systems, and subsequently, implement the obtained knowledge into production [ 5 , 6 ]. Drilling is considered to be one of the most time-consuming operations, and it is estimated that up to 36% of all machine time is spent on holes’ production [ 7 , 8 ]. It is necessary to use high-throughput drilling tools to decrease the costs of drilling operations and significantly decrease the machining time [ 8 ], knowing that the magnitude of the tool force load and torque plays a key role when designing them [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Effect of Machined Material on Cutting Forces during Drilling

Sklenička,

Hnátík,

Fulemová

et al. 2024

Materials

View full text Add to dashboard Cite

Current research studies devoted to cutting forces in drilling are oriented toward predictive model development, however, in the case of mechanistic models, the material effect on the drilling process itself is mostly not considered. This research study aims to experimentally analyze how the machined material affects the feed force (Ff) during drilling, alongside developing predictive mathematical–statistical models to understand the main effects and interactions of the considered technological and tool factors on Ff. By conducting experiments involving six factors (feed, cutting speed, drill diameter, point angle, lip relief angle, and helix angle) at five levels, the drilling process of stainless steel AISI1045 and case-hardened steel 16MnCr5 is executed to validate the numerical accuracy of the established prediction models (AdjR = 99.600% for C45 and AdjR = 97.912% for 16MnCr5). The statistical evaluation (ANOVA, RSM, and Lack of Fit) of the data proves that the drilled material affects the Ff value at the level of 17.600% (p < 0.000). The effect of feed represents 44.867% in C45 and 34.087% in 16MnCr5; the cutting speed is significant when machining C45 steel only (9.109%). When machining 16MnCr5 compared to C45 steel, the influence of the point angle (lip relief angle) is lower by 49.198% (by 22.509%). The effect of the helix angle is 163.060% higher when machining 16MnCr5.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Analysis of Effect of Machined Material on Cutting Forces during Drilling

Sklenička,

Hnátík,

Fulemová

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Surface integrity and surface quality is a widely studied area, but there are several gaps in the research to investigate and develop manufacturing technologies in the area of functional behavior of the machined parts [1]. Due to many of these functional requirements, precisionmachining technologies have to be applied for machining the surfaces [2,3]. Although the number of electronic components is increasing, there is still a considerable need for conventionally machined components.…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Height Distribution of Surfaces Machined by Hard Turning and Grinding

Molnár

2022

Symmetry

View full text Add to dashboard Cite

The asymmetric height distribution of a machined surface can be useful from a tribological point of view in several cases. The purpose of this study is to analyze this asymmetry based on the 3D surface texture parameter skewness, providing technological parameter values that help in achieving favorable surfaces. A 16MnCr5 case-hardened steel (62–63 HRC) was machined by hard turning and grinding based on a comprehensive design of experiments and the topography of the surfaces was measured and analyzed. The texture parameter that informs about the height distribution of the surface points (skewness, Ssk) was compared to the volume parameters peak material volume (Vmp) and valley void volume (Vvv). The main finding is that negative Ssk values are found at low Vmp and Vvv values, which confirms the favorable tribological properties.

show abstract

“…The wide application of rolled niobium tubes has gradually led to the requirement for appropriate deep-hole machining methods for niobium tubes. At present, these methods mainly include drilling, reaming, and boring [5][6][7]. Both gun and twist drilling can be used for the roughing process of deep-hole machining [8,9]; moreover, reaming and boring can be used for semi-finishing of the machined inner surface [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of tool wear in pull boring of pure niobium tubes

Han

Liu

Wang

2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

To improve the surface quality of pure niobium tubes, pull boring can be utilized. However, this type of machining process can result in serious tool wear, tough chips, and poor surface quality. In this study, the cutting tool structure and boring process parameters used to machine pure niobium tubes via the pull boring process were investigated and tool wear was analyzed. The results suggest that unsuitable geometric cutting tool parameters as well as unfavorable boring process parameters can lead to severe wear of the cutter teeth. By adjusting the cutter teeth angle and process parameters, wear of the cutter teeth was significantly reduced and surface roughness of pure niobium tubes was found to be 3.2 μm, which satisfies the surface finish requirements.

show abstract

Analysis of the metallography parameters and residual stress induced when producing bolt holes in Inconel 718 alloy

Cited by 8 publications

References 25 publications

Experimental Analysis of Effect of Machined Material on Cutting Forces during Drilling

Experimental Analysis of Effect of Machined Material on Cutting Forces during Drilling

Asymmetric Height Distribution of Surfaces Machined by Hard Turning and Grinding

Investigation of tool wear in pull boring of pure niobium tubes

Contact Info

Product

Resources

About