CN110914045A - 生产由复合材料制成的零件的方法及由此获得的复合零件 - Google Patents
生产由复合材料制成的零件的方法及由此获得的复合零件 Download PDFInfo
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Abstract
本发明涉及生产由复合材料制成的零件的方法及由此获得的复合零件。所述生产由复合材料制成的零件的方法包括围绕由增强纤维网(F)构成的预成型件(10)添加热塑性或热固性基质(M),所述增强纤维网(F)通过通过围绕框架的突起等缠绕单纤维而制成。所述方法包括另外将纤维(F)缠绕在基质(M)内的一个或几个卷轮(4)上,所述突起等的轴以及所述一个或多个卷轮(4)的轴具有不同的方向,以便提供具有三维形状的纤维的所述网(10)。
Description
技术领域
本发明涉及由复合材料制成的零件的领域,该零件包括纤维增强的热塑性或热固性基质,诸如,非限制性地,配件(fittings)。
背景技术
应注意,术语“纤维”是指增强纤维可能存在的所有形式,即,但不限于,增强纤维的非限制性的股线(strands)、缎带(ribbons)或帘线(cords)。
这种由复合材料制成的零件,例如DE 29 45 469、FR 3032144、DE 102010025940和WO 2015/066407中所述的零件,具有通过将树脂浸渍的纤维缠绕在框架(从其伸出双头螺栓)上而获得的网状结构,从而在所述双头螺栓之间传送和拉伸纤维,以便优选地根据应力的方向引导它们。
如WO 2015/066407所述,由于纺锤的布置,纤维在基本上平行或完全平行的平面中延伸,这导致如此获得的网状结构不能最佳地抵抗在除了与那些与平面平行的方向以外的方向上施加的应力。
已知,增强纤维已证明其在生产既具有抵抗力又轻的机械结构的可能性方面的有效性。该有效性归因于以下事实:形成网的杆受到拉伸应力或压缩应力,该应力特别适于在杆的直线部分中表现出均匀的应力。
众所周知,在复合材料中,纤维的抗压强度比其抗拉强度更适中,特别是由于纤维在压缩下会弯曲(纤维整体或局部弯曲)的问题。
当在中间结(knot)的水平处使纤维交叉时,这一点更加明显,压缩应力不可避免地导致纤维结(fiber junctions)的松弛。
在FR 3032144中,纤维作为网布置在第一预成型件中,将其压紧以形成能够被模塑的第二预成型件。压实阶段引起形成网的杆的非直线性。另外,这些杆的末端的压碎产生了能够在杆中引起寄生应力(parasitic stress)的复杂形状。
此外,在压碎阶段期间,纤维要么被过度拉伸,导致最终零件内应力过大,要么拉伸不足,从而产生褶皱。
为了能够在压缩时对细纤维施加应力,必须满足以下三个条件:纤维必须是完全直线,必须将它们的变形或位移横向锁定在其主方向上,和必须在不引入任何寄生应力的情况将机械作用引入纤维中。
在由纤维交织形成的网状结构的情况下,纤维网络很好地吸收了牵引力,因为这种应力固定了由纤维交叉形成的结。
另一方面,纤维的压缩倾向于使结变松。纤维由于其交叉而弯曲的形状促进了处于压缩状态的纤维的局部弯曲,从而促进了纤维的整体弯曲。
发明内容
本发明的目的是通过提供一种在满足上面所定义的三个条件的同时,用于生产由复合材料制成的零件,特别是用于生产由复合材料制成的零件的网状结构的方法,以及如此获得的零件来克服上述各种缺点,使得零件具有压缩机械强度。
根据本发明的用于生产由复合材料制成的零件的方法包括在预成型件周围添加热塑性或热固性基质,该预成型件由通过在框架的突起等的周围进行单纤维(filament)缠绕而制成的增强纤维网构成,其特征在于,还包括将纤维缠绕在基质内的一个或几个卷轮上,所述突起等的轴与所述一个或几个卷轮的轴具有不同的方向,以使所述纤维网具有三维形状。
根据本发明的方法的另一特征,在成对的内部卷轮之间进行缠绕以形成杆(bar),所述的杆形成所述网状结构。
根据本发明的方法的另一附加特征,一对卷轮中的两个卷轮之间的缠绕通过经过一个和/或另一个卷轮的一侧或另一侧进行,以在连接所述两个卷轮的杆内产生至少一个纤维的相交(crossing)。
根据本发明的方法的另一附加特征,在开始将一个卷轮上的纤维缠绕到另一个卷轮以形成杆之前,围绕该卷轮进行一次或几次完整的缠绕。
根据本发明方法的另一附加特征,在进行为产生所述杆的所述缠绕的期间和/或之后,在形成所述杆的所述纤维之间,围绕所述卷轮进行一次或几次完整的加固缠绕。
根据本发明方法的另一附加特征,通过浸泡或通过喷涂或通过二次成型(overmolding),围绕所述预成型件添加热塑性或热固性基质。
有利的是,卷轮也可以构成最终零件的界面形式(interface form)。
一个内部卷轮或多个内部卷轮允许产生中间结,从而允许将平面方向改变为另一个非平行的方向,并因此制作复杂的整体三维形状。
缠绕过程可以明智地进行自动化处理,它允许在保持张力的同时进行纤维沉积,这是这些纤维直线度的保证。
该局部缠绕可以通过围绕卷轮的初始缠绕被分离成初步产生结形状的阶段,该初始缠绕用于向结提供阻力和最小刚度,然后通过在产生杆的缠绕期间或之后执行的加固缠绕来产生加固杆。
在使用浸渍纤维的热塑性树脂的情况下,通过加热纤维,然后冷却整个预成型件以使其具有整体凝聚力来进行缠绕。
在使用浸渍纤维的热固性树脂的情况下,通过充分加热纤维,然后冷却整个预成型件以在必要时过渡到交联温度而使其具有整体凝聚力来进行缠绕。
这样形成的预成型件然后被基质包围,优选但不唯一地,基质由与浸渍纤维的材料相同的材料制成,通过在具有足够流动性以覆盖纤维网的建议温度下浸泡在构成基质的材料浴中,或者通过喷射或在模具中成型,向先前布置在模具中的网进一步注射零件的填充体积。
根据本发明的方法除了允许获得高的纤维直线度外,其因此还允许使用较少的增强纤维。
此外,它还可以制造更轻和因此更便宜的零件。
附图说明
根据本发明的方法的优点和特征以及该方法允许实施的零件的优点和特征将从以下参照附图的描述中更加清楚地显现,以下描述代表了附图的几个非限制性的实施例。
附图中:
图1和图2示出了通过根据本发明的方法制造平面连杆期间平面连杆的示意图,
图3示出了同一连杆的变型的示意图。
图4示出了同一连杆的一部分的局部示意性剖视图,
图5、图6、图7和图8示出了根据该方法制造的、由复合材料制成的零件的示意性立体图。
具体实施方式
参照图1和图2,可以看到通过实施根据本发明的方法制造的、由复合材料制成的平面的连杆1。
更具体地,图1示出了制造增强纤维F的网状结构10的第一步,网状结构10通过单纤维缠绕制成。
纤维F可以但不限于由增强纤维的股线、段带或帘线组成,其被缠绕在两个滑轮2和3之间以形成连杆1的两个洗眼杯(eyecup),并由未示出的框架支撑。
根据本发明,框架还承载布置在滑轮2和3之间的卷轮4,或中间滑轮,纤维F也缠绕在卷轮4上。
这些卷轮4,或中间滑轮,允许在每对卷轮4之间产生形成网状结构10的杆5。
在图2中,可以看到该方法的下一个步骤,该步骤包括在网状结构10上模制热固性或热塑性基质M,视情况而定,可以将卷轮4和杆5嵌入该基质M中。
现在参照图3,可以看到,根据本发明的方法允许制造网状结构10的多种可能性,特别是当卷轮4具有确定的直径时。
因此,当改变卷轮4上的缠绕方向以通过卷轮4的一侧或另一侧时,可以在杆5中倾斜地拉伸纤维F。
卷轮4允许改变直接或交叉的、单个或多个卷轮,从而允许优化纤维网。
应注意的是,基质M的模制在未示出的模具中进行,并且在进行模制之前可以在模具中布置几个预成型件,每个预成型件都由网状结构10构成。
还应该注意的是,根据本发明,在图1、图2和图3中,在俯视图中看不到的卷轮4可以不在同一平面上,从而使杆5在不与卷轮4的轴垂直的平面上倾斜。
参照图4,可以看到卷轮4,或中间滑轮。在该非限制性实施例中,该卷轮4包括轴(shaft)40和两个侧向凸缘41。
将理解,这样的卷轮4允许纤维F在不与轴40的轴线垂直的平面中延伸。
根据本发明,纤维F在这种卷轮4的水平上的缠绕分为几个阶段。在第一步骤中,围绕凸缘40之间的轴40进行初始缠绕42,以为将要形成的结提供阻力和最小刚度,然后缠绕到另一个卷轮4上以产生杆5,最后在进行为产生杆5的缠绕的期间和/或之后,进行围绕轴40以及在形成杆5的纤维F之间的缠绕43。
这些缠绕的目的是阻止在绕线区域(wound area)中因压缩的变形,也是根据需要减小易于弯曲的杆5的长度。
参照图5、图6、图7和图8,可以分别看到通过实施根据本发明的方法制成的复合零件6、7、8和9。
可以看出,可以在具有不平行的轴的两个卷轮4之间进行纤维的缠绕。如此获得的缠绕在符合形成杆5的纤维束50的直线度的同时被整体扭曲(globally twisted)。
这种与卷轮4的直径的选择相关的扭曲允许产生潜在地具有面外阻力的三维纤维化。
应该注意的是,这些零件6、7、8和9中的一些卷轮4构成了界面形式。
可以形成三维纤维网,该三维纤维网适合于在形成网10的杆5的压缩阶段期间优化具有机械强度的体积零件的纤维化。
Claims (7)
1.一种生产由复合材料制成的零件的方法,包括围绕由增强纤维网(F)构成的预成型件(10)添加热塑性或热固性基质(M),所述增强纤维网(F)通过在框架的突起等的周围进行单纤维缠绕而制成,其中所述方法还包括将所述纤维(F)缠绕在所述基质(M)内的一个或多个卷轮(4)上,所述突起等的轴以及所述一个或多个卷轮(4)的轴具有不同的方向,以使纤维的所述网(10)具有三维形状。
2.根据权利要求1所述的方法,其中在成对的内部卷轮(4)之间进行缠绕,以便形成杆(5),所述的杆(5)形成所述网状结构(10)。
3.根据权利要求2所述的方法,其中一对卷轮(4)的两个卷轮(4)之间的缠绕通过经过一个和/或另一个卷轮(4)的一侧或另一侧而进行,以便在连接所述两个卷轮(4)的所述杆(5)内产生至少一个纤维(F)的相交。
4.根据权利要求2或权利要求3所述的方法,其中,在开始将一个卷轮(4)上的所述纤维(F)缠绕到另一个卷轮(4)以形成杆(5)之前,围绕所述卷轮(4)进行一次或多次完整的缠绕。
5.根据权利要求2至4中任一项所述的方法,其中在进行为产生所述杆(5)的所述缠绕的期间和/或之后,在形成所述杆(5)的所述纤维(F)之间,围绕所述卷轮(4)进行一次或几次完整的加固缠绕。
6.根据权利要求1至5中任一项所述的方法,其中,通过浸泡或通过喷涂或通过二次成型,围绕所述预成型件(10)添加热塑性或热固性基质(M)。
7.一种由复合材料制成的零件(1、6、7、8、9),所述零件由预成型件(10)构成,所述预成型件(10)由增强纤维网(F)构成,所述增强纤维网(F)通过围绕框架的突起等进行单纤维缠绕,并向其添加热塑性或热固性基质(M)而制成,其中所述零件通过根据权利要求1至6中任一项所述的方法获得。
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PCT/FR2018/051397 WO2018229437A1 (fr) | 2017-06-13 | 2018-06-13 | Procede de realisation d'une piece en materiau composite, et piece composite obtenue |
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FR3096063A1 (fr) * | 2019-05-15 | 2020-11-20 | Conseil Et Technique | Elément de construction en matériau composite |
KR102400263B1 (ko) | 2020-04-08 | 2022-05-20 | 이엔셀 주식회사 | 줄기세포 초기 수율 촉진을 위한 줄기세포 배양 방법 |
DE102021105040B3 (de) * | 2021-03-03 | 2021-12-09 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Verfahren und Vorrichtung zum Herstellen eines Faserverbundbauteils |
DE102022120073A1 (de) * | 2022-08-09 | 2024-02-15 | Hochschule Aalen, Körperschaft des öffentlichen Rechts | Verfahren zur Herstellung kernloser Faserverbundbauteile und Wickelstift für ein Faserverbundbauteil |
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CA3067034A1 (fr) | 2018-12-20 |
JP2020523230A (ja) | 2020-08-06 |
FR3067279A1 (fr) | 2018-12-14 |
RU2020100453A (ru) | 2021-07-13 |
US11590714B2 (en) | 2023-02-28 |
FR3067279B1 (fr) | 2021-02-19 |
KR20200042893A (ko) | 2020-04-24 |
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BR112019026445A2 (pt) | 2020-07-14 |
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