Tool vibration in internal turning of hardened steel using cBN tool

Suyama, Daniel Iwao; Diniz, Anselmo Eduardo; Pederiva, Robson

doi:10.1007/s00170-016-8964-y

Cited by 17 publications

(6 citation statements)

References 19 publications

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“…Genel itibari ile yapılmış olan çalışmalarda, L/D oranının yüzey pürüzlülüğü ve dairesellik üzerinde etkili olduğu ileri sürülmüştür. Çelik baranın kullanımı, küçük delik boyları (L/D < 4) için uygun olurken, büyük delik boylarında (L/D > 4) karbür baranın kullanımının daha uygun olabileceği, ayrıca karbür baranın çelik baraya göre titreşimi azalttığı ifade edilmiştir [5,6]. Kesici ucun da, titreşim üzerinde etkili olduğu; [7,8], titreşim sönümlemeli (AVB: Anti Vibration Bar) delik baralarının titreşimi önemli derecede azaltarak delik içi yüzey pürüzlülüğünü iyileştirdiği, karbür baralara göre daha uzun takım ömrüne sahip olduğu, dolayısı ile de daha az maliyetli olabileceği belirtilmiştir [15]- [17].…”

Section: Makale Bi̇lgi̇leri̇unclassified

“…Delik içi tornalama çalışmalarında, başta çelik malzemeler olmak üzere alüminyum, dökme demir ve toz metalurjisi yöntemi ile üretilen alaşım malzeme kullanılmıştır (Tablo 1). [5]. Farklı malzemeler kullanılarak farklı özelliklerle imal edilmiş delik baralarının delik işleme üzerindeki etkilerinin de farklı olduğu anlaşılmaktadır.…”

Section: Kullanılan Malzemelerunclassified

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Delik içi tornalamada kesici ucun ve delik işleme barasının delik işlemeye etkisi

Kayir¹,

ERKOÇAK²

2021

DÜMF Mühendislik Dergisi

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Internal turning is a hole enlargement process that is made by bringing pre-drilled or casting holes to certain dimensions. Boring is an extremely important and precise process in terms of hole tolerance, circularity and surface roughness. During internal turning besides cutting parameters, used cutting insert and used boring bar, has a direct effect on desired surface quality. In this study; The studies on internal turning process were collected. Obtained publications are discussed one by one, in terms of the effect of the boring bar (material, length-diameter (L/D) ratio, damping methods) and the insert (material, geometry, radius, coating) on the roughness of the machined surface, hole geometry, tool wear and cutting forces. As a result of the examinations, it was concluded that, the steel material boring bar is more economical, the carbide boring bar is better for machining holes with a larger L/D ratio, the vibration dampened bars, which are relatively new to use, being suggested that significantly reduce the cutting force, surface roughness and tool wear. Nevertheless, in the used inserts, it has been stated that those with small insert radius and positive cutting angles are more suitable for obtaining the desired hole geometry and tolerances, free surface and crater wear occurs, and better results are achieved on surface roughness and wear with coated inserts.

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Section: Makale Bi̇lgi̇leri̇unclassified

Section: Kullanılan Malzemelerunclassified

Delik içi tornalamada kesici ucun ve delik işleme barasının delik işlemeye etkisi

Kayir¹,

ERKOÇAK²

2021

DÜMF Mühendislik Dergisi

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“…Such techniques can predict surface roughness without interfering with the hard turning process, thereby increasing efficiency and allowing online adjustments [22]. To achieve this, machining status information such as vibrations, cutting forces, images, electric current, cutting heat, acoustic emissions, sound, and chip formation [23]- [25] can be used to monitor the quality of the machining process. Based on feature extraction from such data, a predictive model can be constructed and trained.…”

Section: B Surface Roughnessmentioning

confidence: 99%

Soft Computing Techniques for Surface Roughness Prediction in Hard Turning: A Literature Review

Gao

Zhao

2019

IEEE Access

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Hard turning has become an attractive alternative to the more time-consuming and costly grinding technique. Unfortunately, high-quality prediction of the surface roughness generated during hard turning is difficult due to the technical complexities involved. Hence, it is currently receiving much research attention. The objective of this paper is to survey the current state of the soft computing techniques for surface roughness prediction in hard turning. It focuses on three areas: data acquisition, feature selection, and prediction model of surface roughness. First, the characteristics of hard turning and surface roughness are introduced, and a framework of the soft computing techniques is presented. Then, the three key areas are surveyed thoroughly. Finally, the recommendations and challenges faced by industry and academia are discussed, and the conclusions are drawn.INDEX TERMS Surface roughness prediction, soft computing techniques, hard turning, review.

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“…A boring bar with too much overhang will vibrate under external disturbances due to insufficient stiffness. As a result, the finished hole will not meet the technical requirements and will increase the wear rate of the tool [1][2][3][4][5][6]. Therefore, reducing the vibration of the boring bar during machining is a key issue to improve the quality of deep hole machining.…”

Section: Introductionmentioning

confidence: 99%

Equivalent linearization of hyperelastic rubber rings in dynamic vibration absorber boring bar and simulation of its dynamic properties

Shi,

Ma,

et al. 2024

Eng. Res. Express

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A slight perturbation in high-speed precision cutting could cause violent vibration of boring bars, resulting in unexpected wear and failure of the structures. In this paper, the dynamical characteristic of a boring bar with a dynamic vibration absorber (DVA) is investigated. Considering that the nonlinear characteristics of the rubber ring play a significant role in improving the capacity of DVA, we proposed an equivalent linearization method for modeling hyperelastic rubber rings based on the experimental data of uniaxial tensile test. The relationship between the stiffness of rubber rings and the precompression parameter δ is established for two types of rubber. The equivalent linearization model shows good accuracy and calculation efficiency while the mass of the DVA is confined to a narrow space and the assumption of small strain is inherently satisfied. Numerical results show that the time cost of the equivalent linearization model is only 5% of the full hyperelastic model. Furthermore, the effect of different spring stiffnesses and damping on the dynamic characteristics of the boring bar is compared by using the equivalent linearization model, and the vibration peak of the DVA boring bar is found to be reduced about 45%. Our findings establish a simplified modeling scheme for choosing rubber rings in design of dynamic vibration absorbers with acceptable accuracy and little time cost, which could also give some reference for modeling of metal rubber and gel-like materials.

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Tool vibration in internal turning of hardened steel using cBN tool

Cited by 17 publications

References 19 publications

Delik içi tornalamada kesici ucun ve delik işleme barasının delik işlemeye etkisi

Delik içi tornalamada kesici ucun ve delik işleme barasının delik işlemeye etkisi

Soft Computing Techniques for Surface Roughness Prediction in Hard Turning: A Literature Review

Equivalent linearization of hyperelastic rubber rings in dynamic vibration absorber boring bar and simulation of its dynamic properties

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