The studies of the state of gears production show that there is a problem of ensuring the accuracy and quality of teeth tooling in fi nishing operations. To solve this problem, there has been developed a method of fi nishing the teeth of gears and a design of a special reeling tool for its implementation. A feature of the proposed method is its implementation on universal lathes. This article presents the results of an experimental study of the proposed method of tooling and studying the chip formation process. The research methodology is based on the scientifi c principles of engineering technology, the theory of chip formation, the theory of metal cutting and gear tooling. The metallographic method of research has also been used and the experiment has been planned. The results of experimental studies confi rm the possibility of applying the proposed method for fi nishing side surfaces of the cylindrical gear teeth, at this there has been achieved roughness R a = 1.25 ÷ 0.32 μm. The results of studying chip formation show that the tooling of the "shaver-squeegee" ensures high-quality crushing of chips, it somewhat weakens the structure of the chips and improves the working conditions of the tool and improves the quality of the fi nishing tooling of gear teeth.
This article deals with analysis of the production state of pipeline valves in the Republic of Kazakhstan (RK). As a result of the study, it was found that to ensure high reliability and complete environmental safety of the communications system of pipeline transport, it is necessary to improve the quality of manufacturing pipeline valves and other elements of the pipeline transport system by using new promising developments in the field of mechanical processing, assembly, welding, etc. Актуальность исследования заключается в вопросах производства крупногабаритной арматуры для трубопроводов. Исследованы вопросы проектирования и классификации трубопроводов, трубопроводной арматуры,в частности клапанов. Установлено, что наиболее сложной и трудоемкой в изготовлении среди трубопроводной арматуры является конструкция задвижек. Исследована технология изготовления крупногабаритных задвижек в условиях Усть-Каменогорского арматурного завода и выявлены вопросы обеспечения качества и точности изготовления коробчатого узла. Результаты экспериментальных исследований процесса фрезерования конической поверхности показали возможность использования фрикционной конической фрезы для обработки отверстий с криволинейными поверхностями полукорпуса крупногабаритной шиберной задвижки.
In the Caspian region, the Tengiz oil field has a high content of sulfur, salts and mechanical impurities, which contribute to the rapid deterioration of equipment. The use of titanium alloy allows reducing corrosion wear 2-3 times. Based on the analysis of the design of the slide gate valve, the most exposed parts were identified, which were replaced by Grade 5 titanium alloy. Bench tests of the slide gate valve were put into operation. Laboratory work was carried out to apply titanium-based coatings to steel samples. The result was a structure with a microhardness of 730-810 HV sufficient to protect it against corrosion wear.
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