Analyses of Drill Flute and Cutting Angles

Ren, Kaichun; Ni, Jun

doi:10.1007/s001700050100

Cited by 23 publications

(6 citation statements)

References 5 publications

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“…Hazırlanan matamatiksel modeller ile yapılan analizler, kesme açılarının delik hatalarına %5 oranından daha az etki ettiğini göstermiştir [10]. Hocheng…”

Section: Gi̇ri̇ş (Introduction)unclassified

Delik Delme Operasyonlarında Matkap Geometrisinin, GGG 50 Malzemesi Üzerinde, Delik Kalitesi ve Kesme Performansına Olan Etkisi

Yavuz¹,

Gökçe²,

Yavaş³

et al. 2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada, farklı matkap geometrileri ve kesme parametrelerinin delme performansı üzerine etkileri sistematik bir şekilde incelenmiştir. Farklı geometrilere sahip dört tip matkap kullanılarak itme kuvveti, moment, yüzey pürüzlülüğü ve geometrik toleranstan sapma değerleri ölçülmüştür. Deneysel çalışmalarda ticari olarak temin edilebilen yaygın iki takım geometrisi ile özgün iki kanal geometrisinin performansları test edilmiştir. Delme operasyonu, 10 mm çapında, iki ağızlı, helisel, yekpare sementit karbür matkaplar kullanılarak GGG 50 malzemesi üzerinde gerçekleştirilmiştir. Deney deseni için matkabın geometrik formu, kesme hızı ve ilerleme miktarı olmak üzere dörder seviyeli üç farklı kontrol faktörü ile bir Taguchi Deney Tasarımı oluşturulmuştur. Deney sonuçlarının değerlendirilmesinde Taguchi S/N analizi ve elde edilen verilerin işlendiği grafikler kullanılmıştır. Anova analizi yardımıyla da deney parametrelerinin deney sonuçları üzerindeki önemi ve etki oranları bulunmuştur. Deneysel sonuçlar değerlendirilerek optimum geometri ve optimum işleme şartları belirlenmiştir. Taguchi Sinyal-Gürültü analizinde "en küçük en iyidir" yaklaşımıyla değerlendirilen sonuçlara göre; ilerleme kuvveti, giriş-çıkış yüzey pürüzlülüğü, dairesellikten sapma ve diklikten sapma açısından özgün olarak geliştirilen 4 numaralı takım geometrisi diğer geometrilere üstünlük sağlarken, ilerlemenin en düşük olduğu (0,15 mm/dev.) ve kesme hızının en yüksek olduğu (110-120 m/dak.) kesme parametreleri ise kontrol faktörlerinin optimum seviyeleri olarak belirlenmiştir.

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“…Hazırlanan matamatiksel modeller ile yapılan analizler, kesme açılarının delik hatalarına %5 oranından daha az etki ettiğini göstermiştir [10]. Hocheng…”

Section: Gi̇ri̇ş (Introduction)unclassified

Delik Delme Operasyonlarında Matkap Geometrisinin, GGG 50 Malzemesi Üzerinde, Delik Kalitesi ve Kesme Performansına Olan Etkisi

Yavuz¹,

Gökçe²,

Yavaş³

et al. 2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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“…Torque. Mechanical analysis of coal dust element drill pipe spiral groove is carried out, gravity and inertia force are neglected, and the external forces of coal dust are generalized as in Figure 2 [15,[18][19][20]. In Figure 2, denotes the unit width of the interface between coal dust element and the junk slot, denotes the thickness of coal dust in the direction of , ⃗ and ⃗ denote the normal force and friction, respectively, which are acted by drill pipe spiral groove, and ⃗ , ⃗ , and 0 denote the normal force, friction, and chip removal force, respectively, which are acted by hole wall on the outside surface of coal dust element.…”

Section: Calculation Of Chip Removalmentioning

confidence: 99%

Study on Monitoring Rock Burst through Drill Pipe Torque

Zhu

Wanlei

et al. 2015

Shock and Vibration

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This paper presents a new method to identify the danger of rock burst from the response of drill pipe torque during drilling process to overcome many defects of the conventional volume of drilled coal rubble method. It is based on the relationship of rock burst with coal stress and coal strength. Through theoretic analysis, the change mechanism of drill pipe torque and the relationship of drill pipe torque with coal stress, coal strength, and drilling speed are investigated. In light of the analysis, a new device for testing drill pipe torque is developed and a series of experiments is performed under different conditions; the results show that drill pipe torque linearly increases with the increase of coal stress and coal strength; the faster the drilling speed, the larger the drill pipe torque, and vice versa. When monitoring rock burst by drill pipe torque method, the index of rock burst is regarded as a function in which coal stress index and coal strength index are principal variables. The results are important for the forecast of rock burst in coal mine. Drill Pipe Torque AnalysisWhen drilling in coal seam by electric-drill and twist drill pipe, the torque on drill pipe is mainly acted by electric-drill

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“…The comparison between the analytical results and actual measured cutting angles of drill examples indicated that the average error is less than 5%. Ren and Ni [13] studied both the drill cutting angles and the flute surface models. They developed a new mathematical model to describe the drill flute and the drill flank face with a quadratic model illustrated according to the grinding parameters.…”

Section: Introductionmentioning

confidence: 99%

Integrated Design and Analysis of Diamond-coated Drills

Cai

Qian

Sthur

et al. 2009

Computer-Aided Design and Applications

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The objective of this paper is to investigate the drill geometry effects on the deposition residual stresses in diamond coated carbide drills, especially the interface stresses. The approaches include (1) solid modeling of diamond-coated two-flute twist drills using commercial computer-aided design (CAD) software, and (2) finite element analysis (FEA) to simulate residual stresses in a diamond-coated drill, which are generated during the deposition process due to the mismatched thermal expansion coefficients. It is noted that the residual stresses generated by deposition in diamondcoated drills can be significant, on the order of GPa. The modeling methodology is employed to design drills of different geometries. Further, to compare interface stresses around the cutting edge, 2D FEA is applied to simulate residual stresses of the drill cross-sections and the interface stress data at the drill cutting edge is transformed to quantitatively evaluate the drill geometry effects. The major results are summarized as follows. (1) The micro-level geometry such as the edge radius has the most dominant effects on the interface stresses by the deposition. (2) In particular, the radial normal stresses can become largely tensile, over 1.0 GPa, which may affect the coating adhesion integrity. (3) Changing the macro-level geometry such as the helix angle, point angle, and web-thickness will affect the wedge angle, 10 o to 20 o differences, at the drill tip. However, the effects on the interface stress magnitudes are rather minor.

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Analyses of Drill Flute and Cutting Angles

Cited by 23 publications

References 5 publications

Delik Delme Operasyonlarında Matkap Geometrisinin, GGG 50 Malzemesi Üzerinde, Delik Kalitesi ve Kesme Performansına Olan Etkisi

Delik Delme Operasyonlarında Matkap Geometrisinin, GGG 50 Malzemesi Üzerinde, Delik Kalitesi ve Kesme Performansına Olan Etkisi

Study on Monitoring Rock Burst through Drill Pipe Torque

Integrated Design and Analysis of Diamond-coated Drills

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