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Optimization synthesis of technological parameters during manufacturing of the parts

Kusyi Yaroslav, Stupnytskyy Vadym, Onysko Oleh, Dragašius Egidijus, Baskutis Saulius, Chatys Rafal

Eksploatacja i Niezawodność

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2022

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Vol. 24, no. 4

655--667

EN

Technological ensuring the reliability of machine parts is realized by failing to reach the limited state of the elements of the technological system: machine – clamping device – metal-cutting tool-part. A method of optimization synthesis of parameters of technological processes of manufacturing machine parts has been developed. Testing the developed methodology, it was found that the metal cutting tool is Meanwhile, research has shown that metal cutting machine has the least influence on the formation of detailed quality-adjustable parameters from all the the weakest element of the technological system in terms of reliability and has the greatest impact on the quality of machined parts. elements of the process media "machine – clamping device – cutting tool". Finally, a concrete example is provided to demonstrate the effectiveness of the proposed method. The proposed technique has been successfully tested for the manufacturing process of the reduction-gear housing.

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Analytical investigations of the accuracy of the small diameter tool-joint tapered thread made by a lathe machining

Onysko Oleh, Kopei Volodymyr, Medvid Iulia, Panchuk Vitalii, Pituley Lolita, Vryukalo Viktor

New Trends in Production Engineering

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2019

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Vol. 2, Iss. 1

268--276

EN

The drill string consists of connected drill pipes and other elements. The connection is carried out by screwing of the drill string elements with the help of tool-joint tapered thread. The operational characteristics of the drill pipes depend of the manufacture precision of these tool-joints mostly. The accuracy of the thread is regulated by the accuracy of its profile and the accuracy of its pitch diameter value. The accuracy of the tapered thread manufacturing on the lathe in its depending on the values of the geometric parameters of the lathe tool and the values of deviations of its installation relatively to the workpiece axis is investigated. It is proved that for the tapered thread of form VI profile used for connection of drill pipes with the diameter from 30 mm to 44 mm the most influential factor, in relation to the accuracy of the thread profile is the value of the rake angle. Application of the rake angle value up to -5° according to the research data leads to a deviation from the specified profile of 0.3°, which is more than 35% of the declared standard tolerance on deviations from the profile. Also, the influence of the back rake angle value on the value of the deviation from the standard pitch diameter of the thread is proved. It is proved that the magnitude of the tangential displacement of the nose of the cutter relatively to the axis of the thread up to -0.2 mm can cause a deviation of the profile angle of 0.18°, which is 27% of the standard tolerance.

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Theoretical study of dependence of screwing of drilling-pipe connectoron thread-process cutting tool profile

Panchuk Vitalii, Onysko Oleh, Lukan Tetiana, Medvid Iuliia

Mining – Informatics, Automation and Electrical Engineering

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2019

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R. 57, nr 1

7--17

EN

Screwing is one of the main parameters of the quality of a drill string tapered thread tooljoint. It indicates the number of screwing operations that can be applied to this tool jointduring drilling. Tool joints that have undergone rejection (determined by a specific criterion – the distance between the end faces of the pin and the box before they are startthe screwing) are not permitted to screw. The value of this criterion is proportional to theworking height of the threadprofile, which decreases during operation. In this article, it isoffered to increase the initial value of the criterion of rejection due to the increase of thework height of the thread profile. This can be done without violating the standard butwith the use of a modernized profile of the tool for thread turning. This profile makes itpossible to increase the crest diameter of the thread and at the same time ensure sufficient tool life. Due to its usage, the resource of the tool joint can increase by 9–14.5%,while the cutter’s tool life and cost remain unchanged.

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Teoretyczne badania zależności wkręcania zworników w rurach wiertniczych od profilu krawędzi skrawania noża tokarskiego

Panchuk Vitalii, Onysko Oleh, Lukan Tetiana, Medvid Iuliia

Mining – Informatics, Automation and Electrical Engineering

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2019

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R. 57, nr 1

18--28

EN

Kolumna wiertnicza składa się głównie z rur wiertniczych i łączników między nimi. Złącza te są nazywane zwornikami. Skręcanie i odkręcanie to główny parametr wpływający na jakość zworników. Ten parametr pokazuje, jaka liczba powtórzeń skręcania-odkręcania połączenia złączek wiertniczych jest dopuszczalna w procesie wiercenia otworów naftowych i gazowych. Wykręcanie i odkręcanie zworników określa specjalne kryterium – różnica między końcową powierzchnią mufy a czopem. Różnica ta zmniejsza się podczas określonej liczby operacji skręcania i odkręcania. To kryterium proporcjonalnie zależy od wysokości roboczej gwintu stożkowego (h), który zmniejsza się podczas wiercenia. Dlatego autorzy proponują zwiększenie początkowej jego wartości. Można to zrealizować bez naruszania standardu, ale w wyniku zastosowania zmodernizowanego profilu narzędzia do gwintowania. Zapewnia to zwiększenie liczby skręcania/odkręcania zworników, zwiększenie szczelności zwornika rur wiertniczych, w którym stabilność technologiczna narzędzia skrawającego jest taka sama. W rezultacie trwałość tej złączki może wzrosnąć o 9–14%,a jej cena pozostanie bez zmian.