Diagnosing Technique Improvement of Power and Bearing Designs in Vehicle Bodies and Frames

Author Name(s): Ilnar F. Suleimanov*, Damir A. Kharlyamov, Gennady V. Mavrin, Ilgiz Kh. Khasanov, Vladimir I. Rassokha, Rustem Kh. Khasanov
Author Email: ecolog_777@mail.ru

Abstract

This research paper presents theoretical and experimental studies aimed at vehicle operation efficiency increase by improving the diagnosis of power and load-bearing structures of car bodies and frames without labor-intensive assembly and dismantling operations.

Improved and adapted methods of nondestructive control concerning the technical condition of power and load-bearing structures of vehicle bodies and frames allow them to be diagnosed with minimal material and labor costs.

The developed method of identification for power and load-bearing structures of bodies and frames during the retrospection for the participation of vehicles in emergency situations will allow to detect hidden defects, the foci of corrosion damage, to reveal the most loaded elements of bodies and frames for the timely elimination of malfunctions that affect the safety of a car, and also improve the quality of provided services for the maintenance of mobile machines.

The positive effect of the developed measures to improve the methods of power and load-bearing structures diagnosis of vehicle bodies and frames will increase the technical and economic performance of automobile service enterprises, and will expand the scope of their financial and professional activities.

The presented scientific developments, taking into account the conduct of a number of specific experimental observations, can be rationally used to determine the technical state of power and load-bearing structures of other research objects, for example, the ones which are in a static position during their diagnosing.

Introduction

In recent years, the territory of Russia is characterized by an annual increase of mobile transport system. The major share of growth is accounted for by road transport, where passenger cars make a significant contribution due to the availability of their purchase. With the increase of motorization level explain transport accident rates, which lead to significant social and economic losses of the country. Therefore, the study of problems related to the technical operation of vehicles in the field of system diagnosis responsible for road safety is a priority and a necessary direction for the scientific community.

A body and a frame, being the basic elements of a vehicle, make a significant impact on the overall safety of a car during operation. This is related to the fact that the components and the parts of the steering, braking system and running gear of a car are mounted on the power and load-bearing structural elements of a body and a frame. In this regard, their technical condition has a direct effect on the change of vehicle structural safety indicators.

The control of the technical condition concerning the power and the load-bearing structure of a car body and a frame can be carried out in the following directions: the diagnosis of a system general condition as a power structure, and the control of a body geometric parameters at reference base points.

The power and the load-bearing elements of vehicle bodies are made mainly of rolled sheet steel with the strengthening of their structure by stamping and the provision of a complex box-shaped shape to a section, which provides the greatest strength properties with a smaller mass. During the diagnosing of a vehicle body or a frame general condition they determine the degree of corrosion attack, a crack, the delamination of the protective coating and other defects. At the general estimation of power and bearing design technical condition for bodies and frames the thermal imaging control was applied in this work which allows to reveal the centers of corrosion destructions without the carrying out of labor-consuming assembly dismantling operations that is especially actual for hard-to-reach places of a vehicle [1].

The control of the geometric parameters for the base points of vehicle bodies and frames is based on the determination of control point spatial position correspondence to the manufacturer parameters using modern high-tech equipment, the operation principle of which is based on electronic, optical, ultrasonic, laser or combined distance measurement. When the spatial position of the reference base points of a body or a frame is diagnosed a check is often made for the presence or absence of axle distortion, which can directly affect the handling performance of a car, and hence the safety of traffic [2]. The displacement of the reference body base points during operation or as the result of participation in road accidents with subsequent substandard restoration of a body geometry can be detected from the measurements of installation angles concerning the steered wheels [3-6].

Due to the foregoing, there is a need to implement theoretical and experimental studies focused on the study of preventive, organizational, technical and managerial measures to monitor and predict the technical condition of power and load-bearing structures of vehicle bodies and frames.

The proposed development of this scientific work will improve the diagnostic system for the bodies and frames of modern cars of domestic and imported production.

Conclusions

The proposed method for the diagnosing of power and load-bearing structures of vehicle body and frames allows us to identify the foci of corrosion, hidden defects, the violations of protective and varnish-and-paint materials application technology without long and labor-intensive operations with minimum labor costs.

The developed technique for the determination of power and load-bearing elements of vehicle bodies and frames involvement to damage resulting from road accidents will allow to determine the degree of an emergency object recovery quality and to adjust the amount of natural physical depreciation during the determination of a car residual value.

The scientific observations outlined in this paper will contribute to the improvement of car maintenance quality, and at the carrying out certain measurements during the period of experimental research, it is rational to use the proposed methodology to assess the technical condition of power and load-bearing structures of building and railway facilities during their diagnosing in a static and dynamic position.

Summary

The carried out researches on the diagnostics of power and bearing structures of bodies and frames of vehicles were performed with the use of modern high-tech equipment on the basis of the dealer centers and car-care centers of Orenburg. The following devices and tools were used during the experimental observations: Qnix 1500 coating thickness gage, Genius spectrophotometer, Olimpus IPLEX LX video camera, Phasec 3d flaw detector and ThermoCAM E 300 thermal imaging camera. The main results of the performed research are published in the collections and the proceedings of scientific papers and conferences of various levels [1-12, 15, 16].

The annual economic benefit from the use of an improved technique for the diagnosing of power and load-bearing structures of vehicle bodies and frames at the station of car maintenance of average power cars will make about 600 thousand rubles on the average.

Acknowledgements

The work is performed according to the Russian Government Program of Competitive Growth of Kazan Federal University.

References

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