Features of structure and property formation for cold-rolled low-carbon steels for automobile manufacture in relation to the degree of reduction during cold rolling

Rodionova, I. G.; Mishnev, P. A.; Adigamov, R. R.; Bykova, Yu. S.; Zhilenko, S. V.; Melnichenko, A. S.

doi:10.1007/s11015-012-9548-1

Cited by 3 publications

(2 citation statements)

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“…The practice shows that surface defects appear on the components during cold extruding due to material microstructure heterogeneity [4][5][6][7][8][9][10][11][12][13]; these defects are located as separate areas (by discrete or thorough layer) near the surface, and sometimes in the central area of cross section of bundles. The "orange peel" defect is revealed periodically on the surface of spark plug shell after its cold extruding, in the places corresponded to location of structure defects.…”

Section: Introductionmentioning

confidence: 99%

Improvement of production of billet rods of metallic shell of automatic spark plug for rising usability of finished products

Гун¹,

Пивоварова²,

Tokareva³

et al. 2019

cisisr

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Section: Introductionmentioning

confidence: 99%

Improvement of production of billet rods of metallic shell of automatic spark plug for rising usability of finished products

Гун¹,

Пивоварова²,

Tokareva³

et al. 2019

cisisr

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“…However, the roller surface is damaged due to the comprehensive effect of the stress in the rolling process. Therefore, it is necessary to grind the rollers damaged to reuse them in rolling process, [1][2][3][4][5] and rollers and roller grinding machine are shown in Figure 2. Consequently, the roller grinding workshop is an indispensable factor to ensure the high quality, efficiency, and stability of the rolling process.…”

Section: Introductionmentioning

confidence: 99%

The study of intelligent scheduling algorithm oriented to complex constraints and multi-process roller grinding workshop

Wang

Jiang³

et al. 2014

Advances in Mechanical Engineering

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Roller grinding workshop is a typical multi-unit and multi-task manufacturing scenario, which is aimed to repair the surface damage of the rollers caused by the rolling process, so that the rollers can be reused. Due to the process complexity of roller grinding workshop and the large volume and weight of the roller, hoisting and transportation mode with multiple cranes is required. Consequently, the scheduling of the roller grinding workshop needs to consider both the task sequencing in time and the noninterference of the multi-crane trajectory in space. In this paper, the intelligent scheduling of roller grinding workshop is studied based on the characteristics of complex tasks and space-time coupling constraints. Firstly, the scheduling basis is established based on priority rules and process constraints. In order to solve the scheduling problem under the space-time coupling constraints, the position coordinate system is established, and then the algorithms of crane position tracking and cooperative motion without interference are developed. Further, considering the transportation time of crane and its out of sync time point with the processes, the intelligent decision and scheduling algorithm are developed based on the dynamic priority strategy defined to realize scheduling, including time decision, crane decision, and process decision. With the developed intelligent scheduling algorithm applied, the simulation of the roller grinding workshop is conducted under three combinations of priority strategy and noninterference strategy to verify algorithm performance. Under the guarantee of crane noninterference during the full production, the efficiency is improved by 22.1% compared with the existing processing mode of industry. Additionally, EPTR (effective process time rate) based on dynamic priority strategy and noninterference strategy B is up to 100% to avoid intervals between two processes in the scheduling. The dynamic priority developed in this paper reveals more efficiency than MOR principle, while with the strategy B the CUR (crane utilization rate) can be improved more than 20% under the condition of enough machines which facilitates to obtain shorter makespan than strategy A. The intelligent scheduling algorithm developed guarantees the effectiveness and rationality of scheduling with multi-unit and multi-task under the complex constraints. Finally, in order to realize the automatic and intelligent operation of the roller grinding workshop, the management software of the roller grinding workshop is developed by integrating the intelligent scheduling algorithm, which realizes the intelligent production, monitoring, and management of the roller grinding workshop during the full production cycle.

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A new generation of economical automotive steel

et al. 2016

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To meet the demands of the auto industry, facilitate import substitution, and improve the global competitiveness of Russian products, there is a pressing need for new high quality economical steels with excellent stamping properties, strength, and corrosion resistance. Between 2001 and 2011, intensive research permitted the development of high technology production processes for a new generation of automotive steels; these technologies have no counterparts around the world. A fundamentally new approach was adopted: the required structure and properties of the metal are obtained by regulating the deposition of non metallic excess phases, the state of the solid solution, the grain boundaries, and the types of impurities at all stages of production. On the basis of extensive research, including more than 1000 trial melts, production technologies for more than 30 grades of automotive steel that match-and in many respects outperformtheir foreign counterparts have been introduced at OAO MMK and OAO Severstal'.

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Features of structure and property formation for cold-rolled low-carbon steels for automobile manufacture in relation to the degree of reduction during cold rolling

Cited by 3 publications

References 1 publication

Improvement of production of billet rods of metallic shell of automatic spark plug for rising usability of finished products

Improvement of production of billet rods of metallic shell of automatic spark plug for rising usability of finished products

The study of intelligent scheduling algorithm oriented to complex constraints and multi-process roller grinding workshop

A new generation of economical automotive steel

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