Abstract
An analysis of the state of the matter of the manufacture of parts such as bodies of revolution has shown that there is a problem of turning processing by turning large, long parts, connected with increasing productivity and processing quality, as well as reducing the costs of turning operations. To solve this problem, the authors propose a resource-saving combined method for treating external cylindrical surfaces by thermal friction turn-milling. Experimental studies were performed on the processing of the outer cylindrical surface using a special friction cutter made of non-instrumental material. The results showed that with thermal friction turn-milling, it is possible to achieve Ra = 1,0 mcm. The process of chip formation was also investigated and the formation of a retarded layer was established, which protects the surface of the friction cutter from wear. Optimum values of cutting conditions for processing by thermal friction turn-milling of steel 30HGSA.
Highlights
As a result of the research carried out in the conditions of the mechanical engineering enterprises of the Republic of Kazakhstan (RK), in particular, JSC «Almaty Heavy Machinery Plant», LLP «Maker» – KLMZ and LLP «Kurylysmet» Production No 2 (NOMM plant), it was revealed that there is a problem of turning processing by turning large, long parts related to increasing productivity and processing quality, as well as reducing the costs of turning operations
To solve the above problems, the authors in the framework of the grant theme: AP08956387 «Creating a prototype universal device based on a lathe for the implementation of turn-milling technology» was studied the method of thermal friction turn-milling using a special cutting tool – a friction milling cutter [2], [3]
The results of experimental experiments have shown that the main conditions for satisfactory processing of thermal friction turn-milling of high-strength steels are to ensure the maximum possible rigidity and vibration resistance of the technological system, careful sharpening of the cutting tool and clean working surfaces
Summary
As a result of the research carried out in the conditions of the mechanical engineering enterprises of the Republic of Kazakhstan (RK), in particular, JSC «Almaty Heavy Machinery Plant», LLP «Maker» – KLMZ and LLP «Kurylysmet» Production No 2 (NOMM plant), it was revealed that there is a problem of turning processing by turning large, long parts related to increasing productivity and processing quality, as well as reducing the costs of turning operations. The study and investigation of the influence of cutting regimes on the quality of the treated surface and the process of chip formation during thermal friction milling have both scientific-theoretical and practical significance. The results of the study may lead to the improvement of the structural elements of the cutting tool, and will allow to explain and correctly use in practice the strength and stability dependences. In this regard, the work aimed at investigating the effect of cutting regimes on the quality of the treated surface, as well as the cutting mechanism and the deformed state of the material during processing with thermal friction turn-milling, is an actual task. The main provisions of the theory of cutting materials, the theory of plasticity and elasticity, the theory of chip formation, the technology of metals, materials science
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