Effects of cutting parameters and tool-path strategies on tool acceleration in ball-end milling

Gök, Arif; Gök, Kadir; Bilgin, Mehmet Burak; Alkan, Mahmut

doi:10.17222/mit.2017.039

Cited by 17 publications

(3 citation statements)

References 15 publications

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“…Fatigue calculations can be made in different sectors with finite element analysis [5]. In addition, it is possible to perform simulation verifications with experimental studies and perform different optimization studies [6]. Theoretically, random vibration fatigue life can be realized in the time or frequency plane.…”

Section: Introductionmentioning

confidence: 99%

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

ÖZDEN,

GÖKÇE

2023

European Mechanical Science

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Welded joints are used in many industrial products and evaluations against static and dynamic stresses are important in terms of structure and life safety. It is very difficult to predict and model the vibration fatigue life of welded joints in the frequency plane under dynamic stresses. In this study, fatigue life estimation was made in the welded joint on a structure under vibration stresses in the frequency plane. Vibration characteristics for modes up to 1000 Hz were determined by modal analysis of the structure. In the MIL-STD 810G standard, power spectral density (PSD) is offered for composite wheeled vehicles, which are products of the defense industry. Random vibration analyzes were performed by defining PSD data as analysis input. With the effective notch stress approach, geometry and material S-N definitions were made and evaluations were carried out according to the Dirlik method. As a result of this study, the fatigue life of welded joints was determined as 4.582e+11 seconds. Approaches for structural reliability in a welded joint structure designed for the defense industry are proposed.

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Section: Introductionmentioning

confidence: 99%

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

ÖZDEN,

GÖKÇE

2023

European Mechanical Science

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“…Cutting force is a physical quantity that cannot be ignored in the cutting process. 13 Choosing appropriate cutting parameters in production is able to improve the surface quality of the workpiece and the stability of the machining process, 14 reduce tool wear, 15 reduce cutting temperature, 16 and so on. In the actual production process, reliable cutting force prediction method plays an important role in improving machining efficiency.…”

Section: Introductionmentioning

confidence: 99%

Modeling and investigation of cutting force for SiCp/Al composites during ultrasonic vibration-assisted turning

Lin

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The machining process of SiCp/Al composites is considerably difficult because of the addition of ceramic particles. As an effective machining method, ultrasonic vibration-assisted turning is used to process SiCp/Al composites, which can effectively reduce the cutting force, improve the surface quality, and reduce the tool wear. This study developed a cutting force prediction model for ultrasonic vibration-assisted turning of SiCp/Al composites, which comprehensively considers the instantaneous depth of cut and the instantaneous shear angle. This model divides the cutting force into the chip formation force considering the instantaneous depth of cut, the friction force considering the influence of SiC particles at tool-chip interface, the particle fracture force, and the ultrasonic impact force in the cutting depth direction. By comparing the predicted value of the main cutting force with the experimental values, the results present the same trend, which verifies the feasibility of the cutting force prediction model. In addition, the influence of vibration amplitude, depth of cut, and cutting speed on the main cutting force is analyzed. The systematic cutting experiments show that ultrasonic vibration-assisted turning can significantly reduce the cutting force and improve the machinability of SiCp/Al composites.

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“…Haberi alan Seyfeddin Gazi, Mardin'i kuşattıktan sonra Çermük, Erganin, Tell-i Saf, Hâlâr, Heysem ve Dârâ'yı 1148'de tekrar geri aldı. 48 Sonuç olarak iki devlet barış yapma yoluna gitti ve bu barışın bir göstergesi olarak da Seyfeddin Gazi'nin, Timurtaş'ın kızı Zümürrüd Hatun'la evliliğine karar verildi. Zümürrüd Hatun, Musul'a geldiğinde ölüm döşeğinde olan Seyfeddin Gazi, yaklaşık 40 yaşındayken Ekim-Kasım 1149 yılında vefat etti.…”

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Türk Tarihinin Siyasi Evliliklerine Bir Örnek: Atabey Evlilikleri

ALTIN

KÖMÜRCÜ

2022

Ortaçağ Araştırmaları Dergisi

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Atabeys were civil servants who were responsible primarily for raising the children of the ruler. At first, it was a duty regarding the education of the prince, after some time, it became an institution, and then became politicized. The most obvious aspect of this politicization was the atabeys giving their daughters to the princes or marrying the widowed mothers of the princes. In this way, the atabeys enabled these duties to become an important position in the state administration, in which they also became more effective over time. We see that atabeys played important roles in the fights for sultanate, especially among the Seljukian princes, and as long as the power of the state continued in the central administration, they did not enter into a struggle for independence on their own behalf, but they began to use all the power of princes on their own behalf at the point where the state center weakened. Establishing family ties through political marriages and forming a policy based on them is a path followed by statesmen. In line with this path, sultans, melikes, atabeys made marriages. The main purpose of marriages is to consolidate the authority of the state, to take the allegiance of the principalities, to prevent rebellions and to play an active role in the relations between the dynasties. In the present study, the effects of atabey marriages, which is among the marriages made for political purposes in Turkish history, on Turkish political history were evaluated by giving examples from fifteen atabey marriages made in the historical process.

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Effects of cutting parameters and tool-path strategies on tool acceleration in ball-end milling

Cited by 17 publications

References 15 publications

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

Fatigue life analysis of welded joints in the frequency plane in a structure designed for the defense industry

Modeling and investigation of cutting force for SiCp/Al composites during ultrasonic vibration-assisted turning

Türk Tarihinin Siyasi Evliliklerine Bir Örnek: Atabey Evlilikleri

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