Fiber deformation behavior of discontinuous CFRTP in gear forging
Fiber deformation behavior of discontinuous CFRTP in gear forging
复制标题
齿轮锻造中不连续CFRTP的纤维变形行为
DOI：
10.1007/s12289-021-01611-1
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发表时间：
2021
影响因子：
2.4
通讯作者：
Hashimoto Hayato
中科院分区：
文献类型：
--
作者：
Tatsuno Daichi;Yoneyama Takeshi;Kuga Misaki;Honda Yoshitomo;Akaishi Yukihiro;Hashimoto Hayato
本研究旨在探讨碳纤维强化热塑性坯料锻造直齿圆柱齿轮时纤维变形行为。坯料由纤维长度为30 mm且纤维体积分数为50%的PA 6/UD切片组成。开发了一种齿轮锻造模具，使坯料变形成齿轮形状而不切断纤维。制备了三种类型的坯料：具有在X和Y方向上取向的纤维的水平坯料、具有在Z和X方向上取向的纤维的垂直坯料以及具有在X-Y平面中随机取向的纤维的随机坯料。使用水平和垂直坯料形成沿齿廓沿着的纤维。相邻牙齿之间由纤维连接。最大齿弯曲强度为500 MPa。分层发生在齿谷之下。使用随机坯料的齿中的纤维的取向也是随机的。骨折发生在牙齿的中间。结果表明，坯料中的纤维取向与轮齿中的纤维取向和轮齿强度密切相关。研究中提出的坯料中纤维的取向可以形成纤维沿着分布的高强度齿形。
The purpose of the study is to elucidate fiber deformation behavior during the forging of a spur gear by using a carbon fiber reinforced thermoplastic billet. The billet was composed of PA6/UD chips with a fiber length of 30 mm and fiber volume fraction of 50%. A gear forging mold was developed to deform the billet into a gear shape without cutting the fibers. Three types of billets were prepared: a horizontal billet with fibers orientated in the X and the Y directions, a vertical billet with fibers orientated in the Z and the X directions, and a random billet with fibers randomly orientated in the X–Y plane. The fibers along the tooth profile were formed using the horizontal and vertical billets. The adjacent teeth were connected by the fibers. A maximum tooth bending strength was 500 MPa. The delamination occurred under the tooth valley. The orientation of fibers in the teeth using the random billet was also random. The fracture occurred in the middle of the tooth. The results indicated that the fiber orientation in the billet is strongly correlated to the fiber orientation in the gear teeth and the tooth strength. The fiber orientation in the billet proposed in the study can form a tooth with fibers along its profile and with high strength.
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