Abstract
Many parts for transmitting power are incorporated in an automatic transmission of an automobile. The technical problems of the wet clutch disc (DISC) having important functions related to gear shifting are to improve the automatic gear shifting performance and to ensure the stability of the power transmission torque in the contact action between the DISCs. DISC is manufactured by adhesive bonding of friction material (Fa) and iron core plate (C/ P). In particular, the stabilization of the DISC adhesive strength and thickness accuracy suppresses fluctuations in the surface friction coefficient and is effective in reducing the shock phenomenon during shifting. In this study, the robustness of the DISC bonding sizing method by applying robust design was aimed at stabilizing the bonding strength and thickness accuracy, and the optimum processing conditions were extracted to optimize the mass production method.
Highlights
Many parts for transmitting power are incorporated in the automatic transmission of automobiles
We examined the mechanism of adhesive penetration during bonding and approached the optimization of the bonding sizing method by verifying the correlation between the bonding strength and the plate thickness accuracy using a robust design
We approached the problem of gear shifting performance and power transmission torque deterioration, which are important functions of DISC, due to friction material (Fa) peeling and uneven thickness
Summary
In the field of tribology technology, stabilizing the adhesive strength and thickness accuracy of DISC is extremely effective in reducing the rate of change of the dynamic friction coefficient (μ) on the surface and increasing the robustness of the power transmission torque [5]∼[7]. We approached the stabilization of DISC adhesive strength and plate thickness accuracy of the adhesive sizing method by applying the functional evaluation method of parameter design, which is the central method of “Robust design”. Stabilization of DISC adhesive strength and plate thickness accuracy in the adhesive sizing method is the objective function, and the optimum parameter level condition for obtaining it is extracted by dynamic characteristic evaluation. The main purpose of the “Functional evaluation method” is to efficiently extract parameters that reduce variations and fluctuations by bringing the stable function of adhesive strength and plate thickness accuracy closer to the ideal state. The “Energetic S/N ratio” adopted in this study is a new SN ratio that was researched by a research member of the Kansai Quality Engineering Society, and was announced in June 2008 [17]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
