Scientific and Methodological Base for Technology Provision of Continuous Casting Rollers Operational Properties at Repair

Zolotarev, A. V.

doi:10.14489/hb.2014.12.pp.039-045

2014

DOI: 10.14489/hb.2014.12.pp.039-045

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Scientific and Methodological Base for Technology Provision of Continuous Casting Rollers Operational Properties at Repair

A. V. Zolotarev¹

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Dimensional Analysis of Technological Processes for Reconditioning Machine Parts

et al. 2021

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Reconditioning of worn-out machine components is a significant reserve for improving the efficiency of repair production. Recovery technologies are necessary not only to extend the service life of machine components, they also can improve the efficiency of machine operation. The greatest costs of the repair complex resources are associated with the restoration of the size, spatial deviations, shape and roughness of worn surfaces. With that the operational properties of surfaces corresponding to their functional purpose, are formed simultaneously and first of all, wear resistance and antifrictionality. The key methods of dimensional reconstruction of machine parts are systematized. The required geometric accuracy of the surfaces being restored is obtained by sequential approximation as the operations and stages of the restoration processing are performed. Saving material and labor resources of the repair complex can be ensured by the proper selection and control of the interoperative dimensions obtained at various machining steps. Therefore, along with the study of the physical and technological capabilities of restoration methods, the dimensional analysis of technological processes with a reasonable allowance setting for operating steps of processing the restored surfaces, the thickness of the applied coatings, their final and intermediate values, the size of additional repair parts, etc. becomes relevant. Methods of dimensional restoration of parts by the type of technological impacts are considered. The article describes methods for determining the optimal part dimensions at the stages of preparation for dimensional restoration, intermediate and final dimensions during processing operations, as well as the thickness of the applied coatings, which reduce energy, material and labor costs and improve the quality and operational properties of the restored parts.

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Dimensional Analysis of Technological Processes for Reconditioning Machine Parts

et al. 2021

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Systematization of interfaces of parts of friction units of machines according to the conditions of their contact

et al. 2022

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The processes of friction and wear depend largely on the design of parts of friction units, structural materials and hardening technologies, force, kinematic and temperature characteristics in contact and on the operating conditions. Parts that have failed in terms of wear are classified according to various criteria: according to their functional purpose, materials, types and blanks, weight and dimensions, geometric features and other wear conditions. The range of such parts is very extensive and covers both standard and original designs. Operating conditions determine the various dominant types of wear of parts: changes in the size and shape of surfaces, the appearance of scratches, marks and scuffs on mating surfaces, the formation of cracks, wear, crushing and chipping of working surfaces, wear and destruction of threads, etc. In this regard, it is necessary to classify the parts of friction pairs according to the conditions of their contact in order to most effectively apply hardening methods to increase the durability of the technical system. A classification system for the interfaces of rubbing parts is proposed. It includes 16 groups of interfaces that differ in following criteria: the geometric characteristics of the parts, the conditions of the contact, the relative motion and wear.

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Scientific and Methodological Base for Technology Provision of Continuous Casting Rollers Operational Properties at Repair

Cited by 2 publications

References 0 publications

Dimensional Analysis of Technological Processes for Reconditioning Machine Parts

Dimensional Analysis of Technological Processes for Reconditioning Machine Parts

Systematization of interfaces of parts of friction units of machines according to the conditions of their contact

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