Konchilik sanoatining rivojlanishi ruda va ma’dan konlari mahsulotlarini maydalash va qayta ishlash uchun zarur bo‘ladigan yangi talablarning ortishi bilan namoyon bo‘ladi. Bu esa qazilma mahsulotlarini maydalash va qayta ishlashda qo‘llaniladigan maydalovchi po‘lat zoldirlarni ishlab chiqarishga bo‘lgan talabning ortishi bilan bog‘liq. Maydalovchi po‘lat zoldirlarni ishlab chiqarish amaliyoti aylanuvchi kalta jismlarni prokatlash uchun mo‘ljallangan ikki valokli prokatlash stanlarida amalga oshirilgan. Ushbu zoldir prokatlash stanlari, asosan, yuqori va o‘rta uglerodli po‘lat xomashyolardan ma’lum diametrga ega po‘lat zoldirlar ishlab chiqarish uchun mo‘ljallangan. Maqolada yuqori uglerodli po‘latdan yasalgan maydalovchi po‘lat zoldirlarni issiqligida prokatlash usuli orqali ishlab chiqarish bo‘yicha respublikamizda amalga oshirilayotgan ilmiy izlanishlarning nazariy yechimlari va amaliy natijalari tahlili keltirilgan. Shuningdek, prokatlash jarayonini amalga oshirish uchun eng muhim bo‘lgan kalibrlash texnologiyasi ishlab chiqilgan. Zoldirlar diametri o‘zgarishi va vintli kalibrlarning kirimlar soni turlicha bo‘lgan hollarda, zoldir prokatlash valoklarini kalibrlash texnologiyasining bir-biridan farq qilishi nazariy va amaliy jihatdan asoslab berilgan. Bunda kalibrlash texnologiyasi uchun zaruriy ma’lumotlar prokatlash stanining texnik parametrlari bo‘yicha ishlab chiqilgan. Aniq geometrik o‘lchamlar asosida olingan zoldir prokatlash valoklarida o‘zgaruvchan markazli ariqchalarga ega vintli sirtlarni kesish uchun maxsus nusxa ko‘chirish moslamasi bilan jihozlangan tokarlik vint qirqish dastgohida qirqish amaliyoti bajarilgan.
Konchilik sanoatining rivojlanishi ruda va ma’dan konlari mahsulotlarini maydalash va qayta ishlash uchun zarur bo‘ladigan yangi talablarning ortishi bilan namoyon bo‘ladi. Bu esa qazilma mahsulotlarini maydalash va qayta ishlashda qo‘llaniladigan maydalovchi po‘lat zoldirlarni ishlab chiqarishga bo‘lgan talabning ortishi bilan bog‘liq. Maydalovchi po‘lat zoldirlarni ishlab chiqarish amaliyoti aylanuvchi kalta jismlarni prokatlash uchun mo‘ljallangan ikki valokli prokatlash stanlarida amalga oshirilgan. Ushbu zoldir prokatlash stanlari, asosan, yuqori va o‘rta uglerodli po‘lat xomashyolardan ma’lum diametrga ega po‘lat zoldirlar ishlab chiqarish uchun mo‘ljallangan. Maqolada yuqori uglerodli po‘latdan yasalgan maydalovchi po‘lat zoldirlarni issiqligida prokatlash usuli orqali ishlab chiqarish bo‘yicha respublikamizda amalga oshirilayotgan ilmiy izlanishlarning nazariy yechimlari va amaliy natijalari tahlili keltirilgan. Shuningdek, prokatlash jarayonini amalga oshirish uchun eng muhim bo‘lgan kalibrlash texnologiyasi ishlab chiqilgan. Zoldirlar diametri o‘zgarishi va vintli kalibrlarning kirimlar soni turlicha bo‘lgan hollarda, zoldir prokatlash valoklarini kalibrlash texnologiyasining bir-biridan farq qilishi nazariy va amaliy jihatdan asoslab berilgan. Bunda kalibrlash texnologiyasi uchun zaruriy ma’lumotlar prokatlash stanining texnik parametrlari bo‘yicha ishlab chiqilgan. Aniq geometrik o‘lchamlar asosida olingan zoldir prokatlash valoklarida o‘zgaruvchan markazli ariqchalarga ega vintli sirtlarni kesish uchun maxsus nusxa ko‘chirish moslamasi bilan jihozlangan tokarlik vint qirqish dastgohida qirqish amaliyoti bajarilgan.
В развитии горнодобывающей промышленности наблюдается тенденция увеличения новых требований к дроблению и переработке руды и рудных продуктов. Это связано с возросшим спросом на производство стальных помольных шаров, используемых при дроблении и переработке ископаемых продуктов. На практике производство стальных помольных шаров осуществляется на двухвалковых шаропрокатных станах, предназначенных для прокатки коротких тел вращения. Данные шаропрокатные станы в основном предназначены для производства стальных помольных шаров определённого диаметра из высокоуглеродистого и среднеуглеродистого стального сырья. В данной статье представлен анализ теоретических решений и практических результатов научных исследований, проводимых в нашей республике, по производству стальных помольных шаров из высокоуглеродистой стали методом горячей прокатки. Также разработана важнейшая технология калибровки процесса прокатки. Теоретически и практически обоснована разница технологии калибровки шаропрокатных валков с различными заходностями винтовых калибров при изменении диаметра помольного шара. При этом необходимая информация для технологии калибровки получена исходя из технических параметров шаропрокатного стана. На практике нарезание винтовых поверхностей на основе точных геометрических размеров ручьёв шаропрокатных валков с переменным шагом выполняют на токарно-винторезном станке, оснащённом специальным копировальным устройством.
Development in the mining industry is featured by increased requirements for crushing and processing ore and ore products. This is explained by increased demand for the output of steel grinding balls used in crushing and processing of mineral products. The steel grinding balls are made on two-roll ball rolling mills devised for rolling short solids of revolution. These ball rolling mills are mainly designed for making of steel grinding balls of a certain diameter, from highcarbon and medium-carbon steel raw materials. This article presents a review of theoretical solutions and practical findings from scientific research conducted in our republic, into the manufacture of steel grinding balls made of high-carbon steel by hot rolling method. The most important technology for calibration of the rolling process has also been developed. The difference in the technology of calibration of ball-rolling rolls having different sizes of screw calibers when changing a diameter of the grinding ball has found its theoretical and practical rationale. Moreover, information required for calibration technology was being developed based on technical parameters of the ball rolling mill. Cutting of screw surfaces obtained according to accurate geometric dimensions of the grooves of ball-rolling rolls with variable pitch, was made on a screw-cutting lathe equipped with a special copying device.
№ | Имя автора | Должность | Наименование организации |
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1 | Shaxobutdinov R.E. | texnika fanlari bo‘yicha falsafa doktori (PhD), dotsent | Islom Karimov nomidagi Toshkent davlat texnika universiteti, “Nazariy mexanika va mashina va mexanizmlar nazariyasi” kafedrasi |
2 | Karimova A.R. | katta o‘qituvchi | Islom Karimov nomidagi Toshkent davlat texnika universiteti, “Nazariy mexanika va mashina va mexanizmlar nazariyasi” kafedrasi |
3 | Nosirov T.N. | Zoldir prokatlash sexi boshlig‘i o‘rinbosari | O‘zmetkombinat” aksionerlik jamiyati |
№ | Название ссылки |
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1 | Karimov, R. I., & Shakhobutdinov, R. E. (2020). Development of a cam mechanism taking into account the loading of its links for cutting ball-rolling rolls with screw calibers with an offset center of streams on a screw-cutting machine. Modern problems of Innovative Development of Science, education and production: Proceedings of the International scientific and practical conference, 158–161. Andijan: AndMI. |
2 | Karimov, K. A., Turakhodjaev, N. D., Shakhobutdinov, R. E., & Nosirov, T. N. (2023a). Features of the kinematic calculation of the ball rolling mill drive. Modern knovledge: research and discoveries: Proceedings of the Scientific international conference, 368–374. Vancouver, Canada. |
3 | Karimov, K. A., Turakhodjaev, N. D., Shakhobutdinov, R. E., & Nosirov, T. N. (2023b). Mathematical modeling of the calibration processes of the rolls of a ball rolling mill. Innovations and integrated processing of mineral raw materials - relevant components of economic diversification: Proceedings of the International scientific and practical conference, 72–74. Almaty. |
4 | Karimov, R. I., Shakhobutdinov, R. E., & Xojibekov, T. D. (2018). Modeling of kinematics and dynamics of an eccentric cam mechanism. Applied problems of mathematics: Proceedings of the XXVI International scientific and technical conference, 204–205. Sevastopol. |
5 | Kotenok, V. I. & Podobedov, S. I. (2000,). Creation of effective calibrations of ball rolling rolls and expansion of the range of balls at existing and new mills. Proceedings of the III Congress of distributors (Lipetsk, 1999, October 19–22, pp. 438–441). Moscow: Chermetinformation JSC. |
6 | Selikov, A. I., Barbarich, M. V., & Vasilchikov, M. V. (1971). Special rolling mills. Moscow: Metallurgiya. |
7 | Shakhobutdinov, R. Ye. (2024). Theoretical and applied fundamentals of cam mechanisms used in ball rolling production. Tashkent: Innovative Development Publishing-printing house. |
8 | Shakhobutdinov, R. E., Karimova, A. R., & Nosirov, T. N. (2023a). Development and substantiation of parameters of the theoretical basis for the preparation of grinding steel balls. Mechanics and Technology, 34–41. |
9 | Shakhobutdinov, R. E., Karimova, A. R., & Nosirov, T. N. (2023b). Increase performance by coating 35v9x3cf brand powder wire coating on the working part of the linear guide. Compositional Materials, 190–192. |
10 | Shakhobutdinov, R. E., Karimova, A. R., Xojibekov, T. D., Nosirov, T. N., & Xurramov, D. X. (2023c). Development of a mathematical model of the production of grinding steel balls. Actual problems of applied mathematics and information technologies: Proceedings of the 8th International conference al-Khwarizmi – 2023 (p. 93). Samarkand: SamSU. |
11 | Shakhobutdinov, R. E., Xojibekov, T. D., Nosirovm T. N., & Xurramov, D. X. (2022). Features of calibration of ball-rolling rolls with ultra-high-speed screw calibers. Calibration Bureau, 19–25. |
12 | Shaxobutdinov, R. E. (2021). Mastering the production of a new type of import-substituting products of grinding steel balls with a diameter of 70 mm according to GOST 7524-2015 in the production conditions of “Uzmetkombinat” JSC. Innovations in mechanical engineering, energy-saving technologies and improving resource efficiency: Proceedings of the International scientific and practical conference, 41–44. Namangan. |
13 | Specifications. (2016). Grinding steel balls for ball mills. Moscow: Standartinform. |