Thermal Bending Experimental Study on Carbon Fiber Composite Sheet
Thermal Bending Experimental Study on Carbon Fiber Composite Sheet
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发表时间：
2011
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通讯作者：
Sun Zhen-yu
中科院分区：
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作者：
Sun Zhen-yu
为了提高传统复合材料成形工艺成形复合材料零件的制造效率、降低成本，提出了一种热冲压方法直接成形复合材料零件。用局部加热模具将复合片材的变形区域加热到一定温度。由于树脂加热到一定温度后开始软化，加热后的片材随着模具的移动逐渐成型，然后在冷却模具中固化。对一组“V”形复合材料零件进行热弯曲实验，分析了成形温度、加载速度、脱模温度等工艺参数对成形工件形状精度的影响。热弯曲实验结果表明，碳纤维复合材料板材具有良好的弯曲性能，且弯曲力小。室温下成形工件的回复角与成形参数密切相关，随模具温度的降低而增大，随模具卸载温度的降低而减小。
In order to improve the manufacturing efficiency and reduce the cost for composite parts formed by traditional composite forming processes, a thermal stamping method was proposed to directly form a composite part. The deformation region of the composite sheet was heated to a certain temperature with the locally heated die. Because the resin became softening after heating to a certain temperature, the heated sheet was formed gradually following the die movement, and then solidified in the cooling die. Thermal bending experiments of a group of "V" shape composite parts were done and the effect of process parameters, including forming temperature, loading speed, and die unloading temperature, on shape precision of formed workpiece was analyzed. Thermal bending experimental results show that carbon fiber composite sheets have good bending performance, and the bending force is small. Recovery angle of formed workpiece at room temperature is highly related to forming parameters, which increases with the decreasing of die temperature and decreases with the decreasing of die unloading temperature.