CN102224264B - 弹性拖曳臂的硬化 - Google Patents
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- C—CHEMISTRY; METALLURGY
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- C21D1/18—Hardening; Quenching with or without subsequent tempering
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- B60G7/001—Suspension arms, e.g. constructional features
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
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- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/80—Manufacturing procedures
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Abstract
本发明涉及一种制造车辆的轮轴悬挂的弹性拖曳臂的方法,所述车辆例如卡车或拖车。在该方法中,钢坯体被加热。接着,通过适当的成形工序使坯体成形为拖曳臂的所需形状。然后,通过在有温度的液体介质中使成形的拖曳臂冷却而使其等温淬火。
Description
技术领域
本发明涉及车辆的轮轴悬挂的弹性悬挂臂的制造,所述车辆例如卡车或拖车。在本领域中,这种悬挂臂被称为弹性拖曳臂或弹簧臂。
背景技术
卡车或拖车的轮轴悬挂在车辆的每一侧具有拖曳臂,所述拖曳臂基本上在车辆的纵向延伸。轮轴的轴主体连接于拖曳臂。在车辆的行驶方向观察,每个拖曳臂在前面铰链式地连接至轴承座,所述轴承座布置在车辆底盘上。一般地,空气弹簧布置在这种轮轴悬挂的拖曳臂与底盘之间。弹性拖曳臂一般包括弹簧部分、弹簧部分的前端的孔眼和弹簧部分的后端的安装部分,所述孔眼用于使拖曳臂铰链式地安装至车辆,轮轴主体在所述安装部分可以安装至拖曳臂。
在制造弹性拖曳臂的技术领域中,一般通过使加热后的钢坯体轧制成拖曳臂的所需形状而制造拖曳臂。一般地,这是板簧的形状。拖曳臂一般在多个轧制步骤以及可能的弯曲和切断步骤中成形。成形包括一个步骤,铰链孔眼在这个步骤中在被轧制的弹性拖曳臂的前端被弯曲。这些成形步骤连续地发生,中间产品在连续的轧制与弯曲设备之间被传送。拖曳臂在轧制和弯曲步骤的每一步之前可以被至少局部地再加热。在产品完全成形之后,使其在空气中冷却至室温。通过使钢硬化,成形后的钢臂具有了所需的机械性能,特别地具有了所需的抗拉强度,所述硬化包括使成形后的臂再加热,使得钢变成奥氏体结构,随后使其在大约80℃的油浴中淬火,由此钢获得具有足够抗拉强度的马氏体结构,使得弹性拖曳臂适当地实现其功能。考虑到着火的风险,在油中的淬火是危险的。而且,油对于环境构成威胁。淬火之后获得的马氏体结构非常地硬且易碎,这是弹性拖曳臂所不想要的,因为使用中的弹性拖曳臂承受动载荷。因此,必须在使钢硬化之后通过使其再加热至适度的高温(例如180℃到220℃)而使其回火,并且使其保持在该温度一个或两个小时。
发明内容
本发明的一个目的是提供一种制造弹性钢拖曳臂的替代方法。
这个目的通过一种制造车辆的轮轴悬挂的弹性拖曳臂的方法而实现,所述车辆例如卡车或拖车,该方法包括以下步骤:
-加热钢坯体,
-通过适当的成形工序使坯体成形为拖曳臂的所需形状,
-通过在有温度的液体介质中使成形的拖曳臂冷却而使其等温淬火。
通过该方法,获得了至少在外部区域具有基本上贝氏体结构的拖曳臂。贝氏体结构比弹性拖曳臂中常见的马氏体结构延展性更好,由此马氏体结构必须的回火步骤可以省略,这节省了能源消耗和时间。
可能的情况是,拖曳臂的较内部的区域在等温淬火期间没有转化成贝氏体结构,而是转化成了其它结构,例如转化成了珠光体或铁素体结构或这些结构的混合物,这种情况特别地出现在拖曳臂的较厚部分的较内部的区域中。这可能是因为所述较内部的区域以不同于较外部的区域的速度冷却。在使用中,拖曳臂的较外部的区域承受最大弯曲载荷。因此,令人满意的是,至少从外表面到一定深度的这些外部的区域具有贝氏体结构。这对于内部区域来说可能较不重要,因为它们承受较小的弯曲载荷。
弹性拖曳臂优选地在液体介质中以大约310℃的温度冷却。
弹性拖曳臂优选地在液体盐中以优选地310℃的温度冷却。
当弹性拖曳臂通过锻造而成形时,根据本发明的方法可以特别有利地被利用。拖曳臂于是有利地在一个锻造步骤中成形,由此不需要在成形步骤之间的传送和再加热。而且,锻造后的臂可以特别有利地在其从锻造设备排除或另外移除之后直接浸没在液态盐中。如此,成形后的弹性拖曳臂不需要为了使其硬化而再加热成奥氏体结构。拖曳臂在一个步骤中简单地成形,然后从锻造设备中直接取出到液态盐中被等温淬火。获得的拖曳臂具有贝氏体结构并且具有优选1300N/mm到1600N/mm的足够的抗拉强度。这种特别有利地制造方法因此以高效的方式和节省成本的方式提供高质量的弹性拖曳臂,其中特别节省了时间和能源。
还能够通过在多个锻造步骤中的锻造使拖曳臂成形。
可选地,还能够通过以一般方式轧制而使拖曳臂成形,其后拖曳臂在液态盐中等温淬火。
本发明还涉及一种车辆的轮轴悬挂的弹性拖曳臂,所述车辆例如卡车或拖车,其中弹性拖曳臂包括具有贝氏体结构的钢,其具有大约1300N/mm到1600N/mm的抗拉强度。
附图说明
本发明将在下文中参考附图而阐明,在附图中:
图1示出了轮轴悬挂的弹性拖曳臂的俯视立体图,
图2示出了图1的弹性拖曳臂的仰视立体图,
图3示出了硬化期间的示意性的温度-时间曲线,并且
图4示出了具有图1和图2的拖曳臂的轮轴悬挂的侧视图。
具体实施方式
图1中示出了轮轴悬挂的弹性拖曳臂1的示例性实施例。所示的拖曳臂1由钢制成并且包括弹簧部分2和弹簧部分2的前端的铰链孔眼3,形成了弯曲部分4,弯曲部分4具有凹接触面5,凹接触面5在所示的例子中向下定向。接着从弯曲部分4开始,形成了端部部分6,端部部分6预期用于使空气弹簧安装于其上。
图4中示出了例如拖车或卡车的示例性的轮轴悬挂。在车辆的每一侧,悬挂包括拖曳臂1,拖曳臂1基本上在车辆的纵向上延伸。轮轴的轴主体10在拖曳臂1的安装部分通过钳位构件11连接于拖曳臂1。每个拖曳臂1铰链式地连接至轴承座12,轴承座12布置在车辆底盘14上。其中铰链螺栓15在拖曳臂1的前端延伸通过轴承座12和孔眼3。空气弹簧13或波纹管布置在拖曳臂1的后端部分6与车辆底盘14之间。
在轮轴悬挂的可能的可选实施例中,拖曳臂可以不具有将空气弹簧13安装于其上的整体端部部分6。在该可选地实施例中,钳位构件可以例如具有向后延伸的支撑臂以将空气弹簧安装于其上。
这种臂1的弹簧部分2具有基本上矩形的横截面,所述横截面具有宽度和厚度,该宽度大于该厚度。弹簧部分2可以通过轧制而制造,但优选地通过锻造而制造。弯曲部分4优选地通过锻造而制造。在这种情况下,在弯曲部分4中提供四个钻孔7,这四个钻孔7用于插入钳位螺栓。其可以是U形钳位螺栓使轴主体(未示出)直接接合到拖曳臂1的弯曲部分4的凹侧,或者其可以是钳位螺栓使钳位构件11张紧到轴主体。孔眼3也可以锻造。
拖曳臂1优选地完全通过热锻造而成形。锻造温度使钢具有奥氏体结构。在图3中,其在温度时间曲线中用a表示。锻造热量其后用于通过使拖曳臂1浸没在液态盐浴中而使钢硬化。液态盐的温度优选地为大约310℃。拖曳臂的温度因此从a处的锻造温度随着曲线b降低到c处的盐的温度。拖曳臂1保持在液态盐浴中一定时间,使得钢从奥氏体结构转化为贝氏体结构。这在图中用c表示。在形成贝氏体的等温淬火阶段之后,拖曳臂1从液态盐浴中被取出并且在空气中被冷却至室温,这在图中用d表示。
Claims (7)
1.一种车辆的轮轴悬挂的弹性拖曳臂,其中弹性拖曳臂包括具有贝氏体结构的钢,其具有1300N/mm2到1600N/mm2的抗拉强度,其中所述拖曳臂具有外部区域,该外部区域从外表面延伸了一定深度,且该外部区域具有贝氏体结构,其中所述拖曳臂具有内部区域,该内部区域比所述外部区域的位置更靠内,该内部区域具有不同于所述贝氏体结构的其他结构。
2.根据权利要求1所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述内部区域的结构具有珠光体结构。
3.根据权利要求1所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述内部区域的结构具有铁素体结构。
4.根据权利要求1所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述内部区域的结构具有珠光体和铁素体结构的混合物。
5.根据权利要求1所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述拖曳臂为锻造部件。
6.根据权利要求1所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述拖曳臂包括弹簧部分、弹簧部分的前端的铰链孔眼、和弹簧部分的后端的弯曲部分,所述弯曲部分具有凹接触面。
7.根据权利要求6所述的车辆的轮轴悬挂的弹性拖曳臂,其中所述拖曳臂的弹簧部分具有基本上矩形的横截面,所述横截面具有宽度和厚度,所述宽度大于所述厚度。
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NL2002248A NL2002248C2 (en) | 2008-11-24 | 2008-11-24 | Hardening of flexible trailing arms. |
NL2002248 | 2008-11-24 | ||
PCT/NL2009/000226 WO2010059037A1 (en) | 2008-11-24 | 2009-11-19 | Hardening of flexible trailing arms |
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EP (2) | EP2594652B1 (zh) |
JP (1) | JP2012509989A (zh) |
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BR (1) | BRPI0921398A2 (zh) |
CA (1) | CA2744412C (zh) |
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NL1034756C1 (nl) * | 2007-07-20 | 2009-01-21 | Weweler Nv | Wielasophanging. |
US20120161413A1 (en) * | 2010-12-27 | 2012-06-28 | Gowthaman Subbarayalu | Vehicle air suspension |
EP2812455A1 (en) | 2012-02-10 | 2014-12-17 | Ascometal | Process for making a steel part, and steel part so obtained |
DE102012207157A1 (de) * | 2012-04-30 | 2013-10-31 | Saf-Holland Gmbh | Achsanbindung |
DE102013008877A1 (de) * | 2013-05-27 | 2014-11-27 | Schomäcker Federnwerk GmbH | Parabellenker |
CN106460084A (zh) * | 2014-05-23 | 2017-02-22 | 麦格纳国际公司 | 结构部件的等温淬火 |
JP6258243B2 (ja) * | 2015-03-23 | 2018-01-10 | 日本発條株式会社 | スタビライザおよびその製造方法 |
CN104988401B (zh) * | 2015-07-03 | 2017-07-07 | 中国石油大学(华东) | 一种含钽起重机悬臂 |
CN104988397B (zh) * | 2015-07-03 | 2017-08-01 | 李艳 | 一种含钨起重机悬臂 |
CN104988396B (zh) * | 2015-07-03 | 2017-12-12 | 嵊州北航投星空众创科技有限公司 | 一种含锆起重机悬臂 |
DE102017218795B4 (de) * | 2017-10-20 | 2021-05-27 | Ford Global Technologies, Llc | Achsaufhängung |
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CN201342918Y (zh) * | 2009-01-06 | 2009-11-11 | 上海汇众汽车制造有限公司 | 汽车拖曳臂 |
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- 2009-11-19 US US13/130,446 patent/US8480104B2/en not_active Expired - Fee Related
- 2009-11-19 EP EP13154606.1A patent/EP2594652B1/en active Active
- 2009-11-19 WO PCT/NL2009/000226 patent/WO2010059037A1/en active Application Filing
- 2009-11-19 JP JP2011537380A patent/JP2012509989A/ja active Pending
- 2009-11-19 BR BRPI0921398A patent/BRPI0921398A2/pt active Search and Examination
- 2009-11-19 CN CN200980146703.2A patent/CN102224264B/zh not_active Expired - Fee Related
- 2009-11-19 EP EP09761038A patent/EP2358916B1/en not_active Revoked
- 2009-11-19 ES ES09761038T patent/ES2407532T3/es active Active
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CN2651066Y (zh) * | 2003-10-16 | 2004-10-27 | 上汽集团奇瑞汽车有限公司 | 后拖曳臂 |
CN1959134A (zh) * | 2006-06-27 | 2007-05-09 | 奇瑞汽车有限公司 | 一种汽车发动机曲轴 |
CN201342918Y (zh) * | 2009-01-06 | 2009-11-11 | 上海汇众汽车制造有限公司 | 汽车拖曳臂 |
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US20110254243A1 (en) | 2011-10-20 |
EP2358916B1 (en) | 2013-02-20 |
CA2744412A1 (en) | 2010-05-27 |
US8480104B2 (en) | 2013-07-09 |
EP2594652B1 (en) | 2018-09-19 |
NL2002248C2 (en) | 2010-05-26 |
BRPI0921398A2 (pt) | 2015-12-29 |
JP2012509989A (ja) | 2012-04-26 |
EP2594652A1 (en) | 2013-05-22 |
ES2407532T3 (es) | 2013-06-12 |
CA2744412C (en) | 2015-12-29 |
EP2358916A1 (en) | 2011-08-24 |
CN102224264A (zh) | 2011-10-19 |
WO2010059037A1 (en) | 2010-05-27 |
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