Main trends in intensification of rotor-screw processing of parts

Abstract

The ways of productivity increase in details finishing-strengthening processing executed in rotor-screw technological systems are presented. It is shown that the use of rotor-screw machines makes it possible to combine the parts machining using a vibrating field with a large amplitude of oscillations and their transportation in a streamlined form of production organization. Two main directions of rotor-helical processing stimulation are identified: on the basis of structural changes in the screw rotor, as the main working element of the rotor-screw machine and by equipping the screw rotor with activation elements of the process. The classification of screw rotors is presented, which allows purposeful search for the most effective designs of screw rotors and the mechanism is revealed of their influence on the process of parts finishing-hardening processing. Dependence is established for determining the longitudinal movement speed of the parts being processed in the screw rotor. The constructive-technological scheme of the rotor-screw machine is proposed, which allows increase of the productivity of the process and simplification of the design of machines for their implementation, by dismembering the complex screw propulsion of the load mass, which takes place in the screw rotors, into relatively simple in kinematic sense motions. The technological possibilities of rotor-screw processing application for finishing-strengthening operations are presented.

Bases of Increasing Operational Characteristics of the Equipment for Cement Production

“…For example, figure 1 shows one of the proposed designs of a rotary kiln with a horizontal axis of rotation of the screw body, the novelty of which is confirmed by patents of the Russian Federation for inventions [2][3][4][5][6][7][8][9][10]. Therefore, the development of technology for the manufacture of screw bodies and optimization of their design parameters is a timely, relevant task and allows planning and implementing an innovative way of cement production development, reducing energy costs, improving technical and economic indicators [10][11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Investigation of the Movement of Cement Clinker Particles in the Screw Body of a Rotary Kiln for Its Making

“…The consequence of this is: significant energy costs due to the large size, limited technological capabilities, complexity of operation and a large mass of rotary kilns. To eliminate these shortcomings, technologies and equipment based on screw bodies with a horizontal axis of rotation are proposed, which allows outlining and implementing an innovative way of development of cement production, reducing energy costs, improving technical and economic indicators [10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Principles of Formation and Designing Equipment for Finishing Parts on Screw Rotor Basis

“…Анализ технологий и технических средств для отделочно-зачистной обработки деталей (ОЗО) дает основание предполагать, что процесс обработки деталей частицами рабочих сред (масса загрузки) с использованием колебаний сравнительно больших амплитуд, создаваемых при движении масс загрузки и их встрече друг с другом, а также с поверхностью контейнера, выполненного в виде винтового ротора, является перспективным направлением. Предлагаемая технология обеспечивает совмещение транспортных и технологических операций, образовывает допол-нительные смешивающие потоки и обеспечивает «активацию» масс загрузки, а также создаёт достаточное количество противоточных конвективных потоков массы загрузки с большой амплитудой и малой частотой движения и интенсивно их завихряет [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Тем не менее, предполагается использовать формулу (11) во всём диапазоне изменения переменных m1, m2, ξ. Анализ величин v, приведённых в табл. 2, показывает, что она не зависит от массы детали m1, но заметно зависит от степени заполнения объёма рабочей камеры винтового ротора ξ. Что касается зависимости v от массы частиц рабочей среды m2, то она довольно своеобразна: при малых значениях ξ -заметна, а при ξ = 0,5 -исчезает.…”