Method and device for forming a hollow body
    3.
    发明授权
    Method and device for forming a hollow body 失效
    用于形成中空体的方法和装置

    公开(公告)号:US06776953B1

    公开(公告)日:2004-08-17

    申请号:US09763974

    申请日:2001-05-31

    IPC分类号: B29D2300

    CPC分类号: B21D7/06

    摘要: The invention relates to a process and apparatus for the forming of a hollow body. The process includes providing a forming mold comprising an upper mold and a lower mold which form a mold cavity having a cross-sectional contour in a closed state of the forming mold. The upper mold includes a roller. The hollow body is placed between the upper mold and the lower mold in an area of the mold cavity. The hollow body is preprofiled by moving at least one of the upper mold and the lower mold into the closed state at which time the roller comes into frictional contact with a surface of the hollow body running at an acute angle with respect to a direction of the movement of the at least one upper mold and lower mold. The preprofiled hollow body is then formed into a final shape corresponding to the cross-sectional contour of the forming mold by applying a hydraulic internal pressure into the preprofiled hollow body and expanding the hollow body while the upper mild and the lower mold are in the closed state. By way of the present invention, a hollow body can be reliably formed while significantly reducing the stress on the hollow body.

    摘要翻译: 本发明涉及一种用于形成中空体的方法和装置。 该方法包括提供一种成形模具,该模具包括上模具和下模具,该模具形成在成形模具处于闭合状态的截面轮廓的模腔。 上模包括辊。 中空体在模腔的区域中放置在上模与下模之间。 通过将上模具和下模具中的至少一个移动到闭合状态来预先制成中空体,此时,辊与中空体的表面摩擦接触,该中空体相对于 所述至少一个上模具和下模具的运动。 然后将预制空心体形成为与成型模具的横截面轮廓相对应的最终形状,其中通过将液压内部压力施加到预制空心体中并使中空体膨胀,而上部温和下模具处于闭合状态 州。 通过本发明,可以可靠地形成中空体,同时显着地减小中空体上的应力。

    Fan-type exhaust gas manifold for multi-cylinder internal-combustion
engines and method of making same
    4.
    发明授权
    Fan-type exhaust gas manifold for multi-cylinder internal-combustion engines and method of making same 失效
    用于多缸内燃机的风扇式排气歧管及其制造方法

    公开(公告)号:US5816045A

    公开(公告)日:1998-10-06

    申请号:US615596

    申请日:1996-03-13

    IPC分类号: F01N13/10 F01N13/18 F01N7/08

    摘要: A fan-type manifold for multi-cylinder internal-combustion engines has several first individual pipe sections which are connected in pairs to respective ones of second pipe sections. The first individual pipe sections are undeformed on the end and are cut off at a specific angle. The second pipe sections are produced by an internal high pressure deforming process. The first pipe sections are plugged into the second pipe sections at respective Y-type combining points to form Y-shaped connections and are sealingly welded to each other via surrounding fillet welds. One of the second pipe sections has an additional Y-type combining point for the lateral connection of the other second pipe sections, which are sealingly welded thereto via surrounding fillet welds.

    摘要翻译: 用于多缸内燃机的风扇式歧管具有多个第一单独的管段,它们成对地连接到相应的第二管段。 第一个单独的管段在末端未变形,并以特定角度被切断。 第二管段由内部高压变形过程制成。 第一管段在相应的Y型组合点处插入第二管段中以形成Y形连接并且通过周围的角焊缝彼此密封地焊接。 第二管段中的一个具有用于其它第二管段的横向连接的附加Y型组合点,其通过周围的角焊缝密封地焊接到其上。

    Exhaust gas manifold for an internal combustion engine and method of
making such exhaust gas manifold
    5.
    发明授权
    Exhaust gas manifold for an internal combustion engine and method of making such exhaust gas manifold 失效
    用于内燃机的排气歧管和制造这种废气歧管的方法

    公开(公告)号:US5689954A

    公开(公告)日:1997-11-25

    申请号:US616670

    申请日:1996-03-15

    IPC分类号: F01N13/10 F01N13/18 F01N7/00

    摘要: An exhaust manifold for an internal combustion engine with at least two cylinders includes at least two adjacent connection branches which are interconnected by collection pipe sections having an expansion compensating bellows for accommodating differential thermal expansion therebetween and a gas flow guide pipe structure which extends into the bellows. At least one of the collection pipe sections comprises a multi-layered pipe wall with which the expansion compensating bellows is integrally formed.

    摘要翻译: 用于具有至少两个气缸的内燃机的排气歧管包括至少两个相邻的连接分支,所述至少两个相邻的连接分支通过收集管段相互连接,所述收集管段具有膨胀补偿波纹管,用于在其间容纳不同的热膨胀,以及延伸到波纹管中的气流引导管结构 。 收集管部分中的至少一个包括多层管壁,膨胀补偿波纹管与该整体形成。

    Built-up airgap-insulated exhaust manifold of a motor vehicle and method for producing it
    6.
    发明授权
    Built-up airgap-insulated exhaust manifold of a motor vehicle and method for producing it 失效
    机动车辆的空气隔离排气歧管及其制造方法

    公开(公告)号:US06427440B1

    公开(公告)日:2002-08-06

    申请号:US09574615

    申请日:2000-05-18

    IPC分类号: F01N710

    摘要: A built-up airgap-insulated exhaust manifold of an exhaust system of a motor vehicle includes at least two exhaust pipes with an inlet flange attached in each case to one end and to be fastened to the cylinder head of an internal combustion engine of a motor vehicle. The exhaust pipes include a pipe bend and at least one branched pipe piece connected to the latter. If a plurality of branched pipe pieces are arranged they are connected to one another in a row and the last pipe piece in the row forms a header connected at one end to the exhaust tract leading further on in the exhaust system. The exhaust manifold has at least one exhaust pipe, which is designed as a double pipe with airgap insulation between an outer and an inner pipe, and possessing at least one exhaust pipe without an air insulation gap. The outer pipe and the inner pipe of the airgap-insulated exhaust pipe bear against one another at the end which is plugged together with and welded to an associated inlet flange.

    摘要翻译: 机动车辆的排气系统的积层气隙绝缘排气歧管包括至少两个排气管,每个排气管的入口凸缘在每个壳体中连接到一端并且被紧固到电动机的内燃机的气缸盖 车辆。 排气管包括管弯头和与后者相连的至少一个分支管件。 如果配置有多个分支的管件,则它们彼此连续连接,并且排中的最后一个管件形成在一端连接到排气系统中更进一步的排气道的集管。 排气歧管具有至少一个排气管,其被设计为在外管和内管之间具有气隙绝缘的双管,并且具有至少一个没有空气绝缘间隙的排气管。 空气绝缘排气管的外管和内管在端部彼此抵靠,其端部与一个相关联的入口法兰连接并焊接在一起。

    Method and device for making holes at the circumference of a hollow shape
    7.
    发明授权
    Method and device for making holes at the circumference of a hollow shape 失效
    在中空形状的圆周处制造孔的方法和装置

    公开(公告)号:US5996455A

    公开(公告)日:1999-12-07

    申请号:US974758

    申请日:1997-11-20

    IPC分类号: B21D26/02 B21D28/28 B21D28/18

    摘要: A method and a device for producing holes in the circumference of a hollow shape, with a wall piece being separated as a slug from the hollow shape in an internal high-pressure mold and being jammed without projecting relative to the outer circumference of the hollow shape in a previously produced hole. In order to remove the slug produced during punching in simple fashion from the internal high-pressure mold, the separated slug is jammed at a fluid pressure that is reduced relative to an internal high fluid pressure without loss via a punch and can separate the slug following removal of the finished hollow shape from the internal high-pressure mold, from the hollow shape, finally clearing the hole.

    摘要翻译: 一种用于在中空形状的圆周上产生孔的方法和装置,其中壁件在内部高压模具中与空心形状分离成塞子并且相对于中空形状的外周不会突出而卡住 在以前生产的孔中。 为了以简单的方式从内部高压模具中除去在冲压期间产生的塞子,分离的塞子以相对于内部高流体压力而降低的流体压力被卡住,而不会通过冲头损失,并且可以分离下面的塞子 从内部高压模具中取出成品的中空形状,从中空形状,最后清除孔。