CN108223531B - 用于连接不同材料的摩擦铆钉 - Google Patents
用于连接不同材料的摩擦铆钉 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
本发明涉及用于连接不同材料的摩擦铆钉。具体地,本发明公开了用于连接非钢材料和钢材料的摩擦铆钉以及使用其的连接方法,其中将插入物施加至摩擦铆钉,因此,摩擦铆钉不需要根据下板的材料进行替换,而且还可修复由摩擦铆钉刺入上板内所引起的对上板的损坏。
Description
技术领域
本发明涉及用于连接非钢材料和钢材料的摩擦铆钉以及使用其的连接方法。
背景技术
在汽车工业中,为了鉴于环境问题而改进燃料效率,已通过使用轻量型金属(例如铝合金)或者塑料来促进车身重量的减少。基于本目的,现在正考虑一种连接方法,其可替代通常应用于装配车身的点焊。
已经开发并应用用于连接轻量型材料和钢材料的机械连接技术,特别是这样的一种机械连接技术,即称作摩擦元件焊接(FEW)并应用至此的摩擦铆钉连接。
FEW是这样的技术,其中通过压力使铆钉旋转,所述铆钉穿过由轻量型材料形成的上板,然后利用由旋转摩擦引起的摩擦热将所述铆钉焊接至由钢材料形成的下板。由于在铆钉与下板之间的摩擦连接仅在铆钉材料具有与下板材料相近的硬度水平时才是有可能的,所以FEW的实用性有限。此外,为了增强车身的刚度或者补助连接部位的连接力,可在上板与下板之间应用粘合剂,而当应用摩擦铆钉连接时,摩擦会因粘合剂而无法有效地发生,因此焊接强度会下降。
公开于该发明背景部分的信息仅仅旨在增加对本发明的总体背景的理解,而不应当被视为承认或以任何形式暗示该信息构成已为本领域技术人员所公知的现有技术。
发明内容
本发明的各个方面旨在提供用于连接不同材料的摩擦铆钉以及使用其的连接方法,所述摩擦铆钉可牢牢地连接非钢材料和钢材料。
本发明的方面旨在提供用于连接不同材料的摩擦铆钉,其包括头部、从头部的下部区域伸出的主体部分、以及从主体部分的末端凹进去的腔,其中从腔的下部区域将第二插入物和第一插入物循序地堆叠并容纳在腔中,以及形成产生用以排出第二插入物的流路的流道,所述流道穿过主体部分的形成腔的内表面以及主体部分的外表面。
在示例性实施方案中,第一插入物可由包含合金元素的低碳钢(软钢)形成。
在另一示例性实施方案中,合金元素可包括选自钒(V)、钨(W)、钼(Mo)、铌(Nb)和钛(Ti)中的一种或多种,并且低碳钢可具有0.13重量%至0.2重量%的碳(C)。
还在另一示例性实施方案中,第二插入物可由热塑性树脂形成。
仍在另一示例性实施方案中,热塑性树脂可包括选自聚乙烯醇(PVA)、醋酸乙烯酯、聚丙烯(PP)、聚酰胺(PA)和聚醚醚酮(PEEK)中的一种或多种。
仍然还在另一示例性实施方案中,流道可向下倾斜。
在进一步的示例性实施方案中,流道可以以多个的形式在摩擦铆钉的中心轴周围呈放射状形成。
在另一进一步的示例性实施方案中,腔可从主体部分的末端朝向上的方向变窄地凹进去。
还在另一进一步的示例性实施方案中,以阶梯方式向上变窄的腔可凹进去。
本发明的另一方面旨在提供在由非钢材料形成的上板与由钢板形成的下板之间的连接方法,其包括:将摩擦铆钉置于上板上;通过在施压至摩擦铆钉的同时使其旋转而使得该摩擦铆钉穿过上板并由此与下板接触;利用摩擦热焊接第一插入物和下板,所述摩擦热是在摩擦铆钉与下板之间的接触状态下,通过连续不断地旋转摩擦铆钉并对其加压而由摩擦区产生的;以及利用通过第一插入物所传递的摩擦热来熔化第二插入物并由此通过流道将熔融状态下的第二插入物排出至摩擦铆钉的外部。
本发明的方法和装置具有其它的特性和优点,这些特性和优点从并入本文中的附图和随后的具体实施方式中将是显而易见的,或者将在并入本文中的附图和随后的具体实施方式中进行更详细的陈述,这些附图和具体实施方式共同用于解释本发明的特定原理。
附图说明
图1为根据本发明示例性实施方案的用于连接不同材料的摩擦铆钉的横截面图;
图2示出摩擦铆钉的流道的横截面图,所述摩擦铆钉为根据本发明另一示例性实施方案的用于连接不同材料的摩擦铆钉;
图3示出摩擦铆钉的腔的横截面图,所述摩擦铆钉为仍根据本发明另一示例性实施方案的用于连接不同材料的摩擦铆钉;以及
图4a、图4b、图4c、图4d和图4e示出根据本发明连接不同材料的方法的各自操作的横截面图。
应当了解,附图并不必须是按比例绘制的,其示出了某种程度上简化表示的说明本发明基本原理的各个特征。在此所公开的本发明的特定的设计特征,包括例如特定的尺寸、定向、定位和形状,将部分地由特定目的的应用和使用环境所确定。
在这些附图中,在贯穿附图的多幅图形中,附图标记指代本发明的相同或等同的部分。
具体实施方式
现在将具体参考本发明的各个实施方案,在附图中和以下的描述中示出了这些实施方案的示例。虽然本发明与示例性实施方案相结合进行描述,但是应当了解,本说明书并非旨在将本发明限制为那些示例性实施方案。相反,本发明旨在不但覆盖这些示例性实施方案,而且覆盖可以被包括在由所附权利要求所限定的本发明的精神和范围之内的各种替换、修改、等同形式以及其它实施方案。
在本发明的以下描述中,对并入本文中的已知功能和配置的详细描述将在其会使得本发明的主题名称很不清楚时被省略。在以下实施方案的描述中,术语“包含”和“包括”将理解为说明其它元件或元素的存在,除非另有说明,该术语并不排除相应元件或元素的存在。
在以下实施方案的描述中,术语“上侧”或“上表面”意指向上的方向或图1中面向上的方向的表面,而术语“下侧”或“下表面”意指向下的方向或图1中面向下的方向的表面。
图1为根据本发明示例性实施方案的用于连接不同材料的摩擦铆钉(在下文称为“摩擦铆钉”)的横截面图。
参考图1,摩擦铆钉10包括头部11、从头部11的下部区域伸出的主体部分13、以及从主体部分13的末端凹进去的腔15。
头部11和主体部分13形成摩擦铆钉10的外部框架,而在主体部分13的末端中央形成具有孔洞形状的腔15以使得将第二插入物50和第一插入物30容纳于腔15内。
头部11和主体部分13可由结构碳钢、用于冷镦的碳钢、硼钢等形成,并且可由结构碳钢形成。结构碳钢具有约0.25重量%至0.45重量%的碳(C),以结构碳钢的总重量计。
根据本发明的摩擦铆钉10利用在第一插入物30(而非主体部分13)与由钢材料形成的下板之间的摩擦热来连接不同的材料。
按照常规,只有当根据形成下板的钢材料的物理性质来约束摩擦铆钉的材料时,在其间才有可能相互摩擦,并且由此在其间实现连接。例如,当使用硬度为300Hv的钢板作为下板时,摩擦铆钉可通过使用具有与钢板硬度相近的硬度的材料来制得,从而实现在摩擦铆钉与钢板之间的连接。
另一方面,根据本发明的摩擦铆钉不需要根据下板的材料进行替换,而由此其可显著地改进批量生产性、对材料变化的适应性等。
第一插入物30可由包含合金元素的低碳钢(软钢)形成。
合金元素因摩擦热而供以产生碳化物并由此增加焊接强度,该合金元素可包括选自钒(V)、钨(W)、钼(Mo)、铌(Nb)和钛(Ti)中的一种或多种。但是可阻碍焊接性的碳(C)、硫(S)、磷(P)等不可以用作合金元素。
第一插入物30可由低碳钢形成,所述低碳钢具有比形成头部11和主体部分13的结构碳钢更低的碳含量。在这里,可使用具有约0.13重量%至0.2重量%的碳(C)的低碳钢。
在根据本发明的摩擦铆钉10中,通过摩擦热将第二插入物50液化并由此通过流道17将其排出至摩擦铆钉10的外部,从而改进摩擦铆钉10的连接性能并修复由摩擦铆钉10刺入上板内所引起的对上板的损坏。
因为可将第二插入物50排出至摩擦铆钉10的外部,所以流道17可穿过主体部分13的形成腔15的内表面以及主体部分13的外表面而形成,其中主体部分13的内表面与第二插入物50接触。
流道17可在垂直于摩擦铆钉10的旋转轴的方向上,以直线形状穿过主体部分13而形成,如在图1中示例性示出。但是,流道的形成并不限制于此,而且流道17可向下倾斜,如在图2中示例性示出。
或者,流道17可在摩擦铆钉10的中心轴(即旋转轴)周围呈放射状形成。因此,依照情况而定,可形成多个流道17,并且可在摩擦铆钉10的中心轴周围对称地形成四至六个流道。
第二插入物50可由热塑性树脂形成,其中配置所述热塑性树脂可通过摩擦热变为液相。
热塑性树脂可包括选自聚乙烯醇(PVA)、醋酸乙烯酯、聚丙烯(PP)、聚酰胺(PA)和聚醚醚酮(PEEK)中的一种或多种。
通过使用摩擦铆钉10的连接方法将可更详细、更清楚地理解通过流道17排出第二插入物50的过程,将在后面进行描述。
腔15可以以凹进去的形状,从主体部分13的末端朝向上的方向变窄地形成。由于腔15的这种形状,第二插入物50可具有比第一插入物30更小的尺寸,如在图1中示例性示出。
但是,腔15还可以以凹进去的形状且以阶梯方式形成,从而容纳以阶梯方式堆叠的第一插入物30和第二插入物50,如在图3中示例性示出。在这里,阶梯方式意指在主体部分13围绕第一插入物30的部分的厚度与主体部分13围绕第二插入物50的部分的厚度之间的差异。腔15可首先在垂直方向上从主体部分13的末端凹进去预定的距离,在水平方向上弯曲以具有预定的缩减宽度,然后在垂直方向上再次凹进去预定的距离,从而具有阶梯结构。
在将第二插入物50和第一插入物30容纳于腔15中时,从主体部分13的末端到第一插入物30的距离A可具有大于0的最小值。当距离A为0时,腔15会难以牢固地容纳第一插入物30。另一方面,当距离A过大时,第一插入物30在连接过程中不能与下板接触。
在下文中,根据本发明的连接不同材料的方法将参考图4a至图4e进行详细的描述。
本发明的连接方法为在由非钢材料形成的上板70与由钢材料形成的下板90之间的连接方法,这种方法包括以下操作。
首先,上板70可由包含碳纤维增强塑料(CFRP)或铝的轻量型材料形成,而下板90可由包含钢板的钢材料形成。
如在图4a中示例性示出,将摩擦铆钉10置于上板70上。
其后,如在图4b中示例性示出,通过在施压至摩擦铆钉10的同时使其旋转,该摩擦铆钉10穿过上板70并到达下板90。
其后,如在图4c中示例性示出,已经穿过上板70的摩擦铆钉10与下板90接触。更具体地,通过施加至摩擦铆钉10的压力使主体部分13变形,而且第一插入物30与下板90接触。因此,在第一插入物30和下板90之间的摩擦区B产生。
其后,如在图4d中示例性示出,通过在施压至摩擦铆钉10的同时使其连续不断地旋转,摩擦区B达到约600℃至700℃的温度,并因此通过摩擦热焊接第一插入物30和下板90(如在B’区中所示)。因摩擦铆钉10的旋转而在头部11的周围产生上板70的毛边71。将这种毛边71排出至摩擦铆钉10的外部并可由此将其轻易地去除。
其后,如在图4e中示例性示出,因为摩擦铆钉10是在摩擦铆钉10穿过上板70的情况下连续不断地进行旋转的,所以存在围绕摩擦铆钉10的上板70会受损的极大可能性。因此,在本发明的示例性实施方案中,为了修复对上板70的损坏,可通过流道17将第二插入物50排出至摩擦铆钉10的外部。更具体地,当摩擦区B的温度升高并由此达到可进行焊接的温度时,通过第一插入物30将摩擦热通过传导而传递至第二插入物50,并由此使第二插入物50熔化。换言之,第二插入物50变为可流动的液相。然后,通过离心力将液相的第二插入物50沿着流道17排出至摩擦铆钉10的外部,所述离心力是因摩擦铆钉10的旋转以及由第一插入物30所施加的压力而产生。因此,在摩擦铆钉10与上板70之间的接触表面形成涂膜C。涂膜C修复并降低了对上板70的损坏,以及减少了上板70与摩擦铆钉10之间的接触区从而防止电化腐蚀。
从以上描述中可以明显地看出,根据本发明的用于连接不同材料的摩擦铆钉以及使用其的连接方法可具有如以下所描述的效果。
将在第一插入物与下板之间的摩擦力用于连接上板和下板,因此,不论下板的各种各样的钢材料,都可以应用相同的摩擦铆钉,而且还可极大地改进摩擦铆钉的实用性。
而且,通过流道将液相的第二插入物排出至摩擦铆钉的外部,而该第二插入物修补包括产生于摩擦铆钉穿过上板(其由轻量型材料形成)时的上板裂纹的缺陷,因此,可极大地提高摩擦铆钉的产品质量和适销性。
此外,将液相的第二插入物排出至摩擦铆钉的外部,而该第二插入物显著地减少摩擦铆钉与上板之间的接触区,因此,可防止电化腐蚀的风险。
为了方便解释和精确限定所附权利要求,术语“上部”、“下部”,“内部的”、“外部的”、“上”、“下”、“向上”、“向下”、“前面”、“后面”、“背部”、“在里面”、“在外面”、“向内”、“向外”、“内部”、“外部”、“向前”和“向后”是用于参考图中显示的这些特征的位置来描述示例性实施方案的特征。
已呈现的前述对本发明的具体示例性实施方案的描述是为了例证和说明的目的。这些描述并非旨在穷尽本发明,或者将本发明限定为所公开的精确形式,并且很显然,根据上述教导,可以进行很多修改和变型。对示例性实施方案进行选择和描述是为了解释本发明的某些原理及其实际应用,从而使得本领域的其他技术人员能够实现并利用本发明的各种示例性实施方案以及它们的各种替换和修改。本发明的范围意在由所附的权利要求书及其等同形式所限定。
Claims (10)
1.一种用于连接不同材料的摩擦铆钉,其包括:
头部;
从所述头部的下部区域伸出的主体部分;以及
从所述主体部分的末端凹进去的腔,
其中从所述腔的下部区域将第一插入物和第二插入物循序地堆叠并容纳在所述腔中;以及
其中形成产生用以排出所述第二插入物的流路的流道,所述流道穿过所述主体部分的形成所述腔的内表面以及所述主体部分的外表面,
其中通过摩擦热将第二插入物液化并由此通过流道将其排出至摩擦铆钉的外部。
2.根据权利要求1所述的用于连接不同材料的摩擦铆钉,其中所述第一插入物由包含合金元素的低碳钢形成,所述低碳钢为软钢。
3.根据权利要求2所述的用于连接不同材料的摩擦铆钉,其中
所述合金元素包括选自钒V、钨W、钼Mo、铌Nb和钛Ti中的一种或多种;以及
所述低碳钢具有0.13重量%至0.2重量%的碳C。
4.根据权利要求1所述的用于连接不同材料的摩擦铆钉,其中所述第二插入物由热塑性树脂形成。
5.根据权利要求4所述的用于连接不同材料的摩擦铆钉,其中所述热塑性树脂包括选自聚乙烯醇PVA、醋酸乙烯酯、聚丙烯PP、聚酰胺PA和聚醚醚酮PEEK中的一种或多种。
6.根据权利要求1所述的用于连接不同材料的摩擦铆钉,其中所述流道配置为向下倾斜。
7.根据权利要求1所述的用于连接不同材料的摩擦铆钉,其中所述流道以多个的形式在所述摩擦铆钉的中心轴周围呈放射状形成。
8.根据权利要求1所述的用于连接不同材料的摩擦铆钉,其中所述腔从所述主体部分的末端朝向上的方向变窄地凹进去。
9.根据权利要求8所述的用于连接不同材料的摩擦铆钉,其中朝向上的方向变窄的所述腔以阶梯方式凹进去,以具有宽度差异。
10.一种在由非钢材料形成的上板与由钢板形成的下板之间的连接方法,其包括:
将根据权利要求1所述的摩擦铆钉置于所述上板上;
通过在施压至所述摩擦铆钉的同时使摩擦铆钉旋转而使得所述摩擦铆钉穿过所述上板并由此与所述下板接触;
利用摩擦热焊接第一插入物和所述下板,所述摩擦热是在所述摩擦铆钉与所述下板之间的接触状态下,通过连续不断地旋转所述摩擦铆钉并对所述摩擦铆钉加压而由摩擦区产生的;以及
利用通过第一插入物所传递的摩擦热来熔化第二插入物,并由此通过流道将熔融状态下的第二插入物排出至所述摩擦铆钉的外部。
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