https://doi.org/10.25198/2077-7175-2020-2-100
IMPROVEMENT OF THE METHOD OF AUTOMOBILE SPRINGS RECOVERING
N. A. Zemlyanushnov1, N. Y. Zemlyanushnova2
North-Caucasus Federal University, Stavropol, Russia
1e-mail: nikita3535@mail.ru
2e-mail: zemlyanushnova @rambler.ru
Abstract. Research in the field of improvement of methods of repair of details and units aimed at solving the actual scientific problem of efficiency upgrading of automobile transport exploitation. Significant details in the device of modern motor vehicles are helical cylindrical springs. Springs are included in gas distribution mechanisms, atomizing nozzles, high-pressure fuel pumps, brake systems, speed-change gearboxes, clutches, front and rear suspension and others. Springs are subjected tosignificant thermal,static and cyclic (including contact) loads and other adverse factors in the process of technical operation of cars. In springs hidden defects of metal are develop, unacceptable residual deformations and loss of workload are arise.Known methods for recovering springs have disadvantages, are labor-intensive and require significant material resources, so they have not been widely used in repair practice.Improving the quality of recovering springs by repair production companies will improve the operational reliability of vehicle components and assemblies and the efficiency of their repair. Methods of thermomechanical treatment in combination with contact predeformation and peen hardening are recommended to use when recovering of springs.
The purpose of the study is to increase the efficiency of automotive equipment operation by improving existing methods for recovering the operational properties of springs. A new method of spring recovering from previouslyhardened wire is offered. The advantage of new method, in relation to the known ones, is inthe extension of technological capability and improving quality of recovering springs. The scientific novelty of the method is that after peen hardening of spring tempering perform at a temperature less than or equal to 220 °C within 30 minutes, after that the spring is pressed at 200…250 °C by axial compression 10F3 (F3 – spring force at the time coils contact) load for the springs operating without coils contact and by 5 per cent exceeding the spring load in the workpiece but not less than 10F3 for the springs operating with coils contact.The proposed method can be used to restore the springs of motor vehicles.The directions of further research are the theoretical and experimental justification of the proposed method.
Keywords: automobile springs, recovery, tempering, plastic hardening, peen hardening, contact predeformation.
Cite as: Zemlyanushnov, N. A., Zemlyanushnova, N. Yu. (2020) [Improvement of the method of automobile springs recovering]. Intellekt. Innovatsii. Investitsii [Intellect. Innovations. Investments]. Vol. 2, pp. 100–106. DOI: 10.25198/2077-7175-2020-2-100.
