Study Of A Continuously Variable Transmission Belt Made Of Carbon Fiber-reinforced Thermoplastic Resin

WIT Transactions on State-of-the-art in Science and Engineering Pub Date : 2015-12-09 DOI:10.2495/978-1-78466-167-0/016

T. Minagawa, T. Tanaka, A. Yoshihiko, T. Ichiki, A. Inoue

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Abstract

The purpose of this study is to develop automotive frictional parts, especially continuously variable transmission (CVT) blocks using a composite material made of thermoplastic resin and fiber. CVT blocks were used at about 100oC under high pressure and friction conditions; nylon 9T, otherwise named PA9T, was used. PA9T has a high melting point which is higher than the maximum temperature at the state of slip. To apply composite materials to the manufacture of CVT blocks, material properties such as high strength, modulus of elasticity and fatigue strength are important. Therefore, the aim of this study is improvements in mechanical properties by adding fillers to PA9T under various compounding and molding conditions. PA9T and carbon fibers were mixed using a twin screw extruder. After compounding, dumbbell specimens were made using an injection molding machine. Bending, fatigue and abrasion tests were conducted. Moreover, the transmission capacity of CVT belt made of PA9T composites was evaluated and slip tests were conducted. According to the results of tests, PA9T with CF38.8 vol% achieved desired values for CVT application. The CVT belt has a torque capacity of 40 Nm under an axle load of 2.0 kN.

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碳纤维增强热塑性树脂无级变速器带的研究

本研究的目的是利用热塑性树脂和纤维制成的复合材料开发汽车摩擦部件，特别是无级变速器(CVT)挡块。CVT块体在高压和摩擦条件下在100℃左右使用;尼龙9T，也被称为PA9T。PA9T熔点高，高于滑移状态下的最高温度。为了将复合材料应用于CVT块体的制造，材料的高强度、弹性模量和疲劳强度等性能是非常重要的。因此，本研究的目的是通过在各种复合和成型条件下向PA9T中添加填料来改善其力学性能。采用双螺杆挤出机对PA9T和碳纤维进行混炼。混合后，用注塑机制作哑铃样品。进行了弯曲、疲劳和磨损试验。对PA9T复合材料CVT带的传动性能进行了评价，并进行了滑移试验。试验结果表明，含CF38.8 vol%的PA9T达到了CVT应用的理想值。在2.0 kN的轴荷下，CVT带的扭矩容量为40 Nm。

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WIT Transactions on State-of-the-art in Science and Engineering

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