Experimental Investigation of Microcutting Mechanisms in Marble Grinding

Tanovic, Lj.; Bojanic, P.; Puzović, Radovan; Klimenko, S. A.

doi:10.1115/1.4000619

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…Mechanical rock cutting in various forms is widely used in mining and civil engineering in areas such as drilling , tunnelling and grinding . To understand the rock cutting mechanism, laboratory rock cutting tests have been the most direct and reliable source.…”

Section: Introductionmentioning

confidence: 99%

Discrete element modelling of rock cutting: from ductile to brittle transition

2015

Int. J. Numer. Anal. Meth. Geomech.

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It is well accepted that there is a transition of failure mode from ductile to brittle with increasing depth of cut during rock cutting process. Rock failure modes affect cutting efficiency, and knowledge of the failure transition is essential to the determination of optimum cutting parameters. The critical transition depth can be linked with rock properties. In this study, an attempt was made to model rock cutting process and to check the dependence of the critical failure mode transition depth on the brittleness of rock. For this purpose, dimensional analysis was first performed to establish the correlations between rock macro-properties and micro-parameters for discrete element simulations. Following the specimen calibration procedure, two types of synthetic rocks having approximately the same uniaxial compressive strength were generated as the synthetic specimens for simulating the rock cutting process. The first specimen was created using conventional model construction method with identical bond strengths between particles, giving rise to undesirably high indirect tensile strength. The second specimen was created using a proposed clustering algorithm such that the ratio between the tensile and compressive strength matches reasonably well with that of real rocks. The results of rock cutting simulations demonstrate that failure mode transition took place in both models, but for the clustered model the transition emerged at a shallower cutting depth. A further exploration was made to derive the critical depth for this transition based on the simulations performed on the clustered models. The derived relationship indicates that the critical transition depth decreases as strength ratio or brittleness of the rock increases. This provides a very useful tool for predicting the critical depth which can be used to help cutting tool design and cutting parameter optimisations.

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Section: Introductionmentioning

confidence: 99%

Discrete element modelling of rock cutting: from ductile to brittle transition

2015

Int. J. Numer. Anal. Meth. Geomech.

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“…Bunun yanı sıra, fiziko-mekanik özellikler dikkate alındığında Isparta Silver örneğinin açık gözeneklilik oranı diğer örnekler içinde en yüksek değere sahiptir. Daha önceki çalışmalarda da belirtildiği üzere, parlatma işleminde çalışma parametreleri yanısıra, kayaç özelliklerinin de etkili olduğu birçok çalışmada belirtilmiştir (Tanovic et al 2009. Bu yüzden, Isparta Silver kireçtaşının parlatma performansında abrasivlerin yanı sıra kayaç özelliklerininde etkili olduğu sonucuna varılmıştır.…”

Section: Sem İncelemesiunclassified

The Effects of Different Abrasives on Some Limestone Polishing Process

Gürcan¹,

Öztürk²

2014

AKU-J. Sci. Eng.

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ÖzetBu çalışma, sedimanter kökenli kireçtaşlarının parlatılmasında farklı abrasivlerin etkisinin incelenmesi amacıyla yapılmıştır. Bu amaçla, ticari olarak üretimi yapılan Türkiye'deki farklı bölgelerden elde edilen üç adet kireçtaşı örneği kullanılmıştır. Parlatma işlemlerinde laboratuvar ölçekli bilgisayar kontrollü bir cila makinesi kullanılmıştır. Parlatma deneyleri, aynı abrasiv serisi, sabit bant hızı ve kafa basıncında 30x30x2cm boyutlarındaki kireçtaşı örneklerinde gerçekleştirilmiştir. Farklı abrasivlerle parlatılan örneklerdeki değişimin tanımlanması amacıyla pürüzlülük ve parlaklık ölçümleri gerçekleştirilmiştir. Ayrıca, taramalı elektron mikroskop (SEM) yardımıyla farklı abrasiv türlerinin tane boyutları belirlenmiştir. Parlatma deneyleri sonucunda, azalan abrasiv serisine bağlı olarak pürüzlülüğün azaldığı ve parlaklığın arttığı gözlenmiştir. Kireçtaşlarının farklı abrasivle parlatılması ile pürüzlülük ve parlaklık değerlerinin değişim gösterdiği ve abrasivlerde bulunan aşındırıcı tane boyutunun ve tane şeklinin pürüzlülük ve parlaklık özelliklerini önemli ölçüde etkilediği sonucuna varılmıştır. The Effects of Different Abrasives on Some Limestone Polishing ProcessKeywords Limestone; Roughness; Glossness AbstractIn this study, polishing properties of limestone were investigated to determine the effects of different abrasive. To achieve this goal, three different limestone samples commercially available in the market were studied from different area of Turkey. Using a laboratory-scale polishing machine, polishing experiments were applied under constant band speed, abrasive head pressure and abrasive head rotation for samples having 30x30x2cm dimension. Roughness and brightness measurements were carried out on pre-determined surfaces of the marble samples. Besides, particle sizes of abrasives were determined by scanning electron microscopy (SEM) analysis. Polishing experiments showed that, with a few exceptions, brightness increases with decreasing roughness. It was also concluded that the particle sizes of abrasive present in the different abrasives, as well as their shape, greatly affected brightness and roughness properties of the tested limestone varieties.© Afyon Kocatepe Üniversitesi GirişDoğaltaşlar, doğadan çıkarıldıktan sonra ham ya da işlenerek kullanılan en önemli inşaat malzemelerinden biridir. Doğaltaşlar renk ve doku çeşitliliği, dayanıklılığı ve işlenebilirliği sayesinde, tarih boyunca yapılarda ve anıtlarda kullanılmıştır. Zamanla kullanımı artan doğaltaşlar günümüzde özellikle inşaat, kaplama, döşeme, hediyelik eşya, mezar taşı yapımı gibi alanlarda sıklıkla kullanılmaktadır. Doğaltaşlar içinde en yaygın kullanılan türler; mermer, granit, kireçtaşı ve travertendir. Sedimanter kökenli bir kayaç olan kireçtaşı; dayanıklılığı, renk ve doku çeşitliliği, cila alma kabiliyetinden dolayı dış kaplama ve yer döşemesi olarak son yıllarda büyük oranda kullanılmaktadır.Günümüzde kullanılan doğal taşların birçoğunun cilalı bir yüzeye sahip olması istenmektedir. Cilalanmış doğaltaşlar gerek renk ge...

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“…Scholars have deeply explored the grinding mechanism. Tanovic et al 6 took a single diamond particle as the research object to study the micro-cutting characteristics in the marble-grinding process. The normal component of cutting force and particle trajectory in micro-cutting of a single diamond was determined experimentally.…”

Section: Introductionmentioning

confidence: 99%

Cortical bone grinding mechanism modeling and experimental studyfor damage minimization in craniotomy

Fan

et al. 2021

Proc Inst Mech Eng H

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Craniotomy, as a part of neurosurgery, implies a safe opening of the skull with mechanical equipment. Grinding is a traditional machining method that can accurately and efficiently remove bone tissue. Aiming at low-damage and high-efficiency bone grinding, this study analyzed the kinematic law of a single abrasive grain during the grinding process. The theoretical model of grinding force was established based on the calculation of specific energy and friction force. The grinding test platform was set up, and the full factorial experimental design was performed to link the grinding force evolution with different processing parameters. The experimental results obtained on porcine femurs validated the model predictions where the grinding force grew with feed speed and grinding depth; it exhibited a decreasing trend with rotation speed, followed by increasing one.

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Experimental Investigation of Microcutting Mechanisms in Marble Grinding

Cited by 10 publications

References 17 publications

Discrete element modelling of rock cutting: from ductile to brittle transition

Discrete element modelling of rock cutting: from ductile to brittle transition

The Effects of Different Abrasives on Some Limestone Polishing Process

Cortical bone grinding mechanism modeling and experimental studyfor damage minimization in craniotomy

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