公开(公告)号：US20140069355A1

公开(公告)日：2014-03-13

申请号：US14080975

申请日：2013-11-15

Applicant: MAHLE International GmbH

Inventor： Rainer SCHARP ,  Matthias SEIFRIED

IPC: F02F3/16

CPC classification number: F02F3/16 ,  B23K20/12 ,  B23K2101/003 ,  B23P15/10 ,  F02F3/003 ,  F02F3/22 ,  F02F2003/0061 ,  Y10T29/49249

Abstract: A piston for an internal combustion engine is formed by the following steps: (a) providing a blank of a piston base body, having an outer joining surface, an inner joining surface and a circumferential lower cooling channel part that runs between the two joining surfaces, (b) providing a blank of a piston ring element, having an outer joining surface, an inner joining surface and a circumferential upper cooling channel part that runs between the two joining surfaces, (c) forming a circumferential widened region on at least one joining surface, the widened region extending toward the related cooling channel part, (d) connecting the blank of the piston base body with the blank of the piston ring element by way of their joining surfaces, by friction welding, to produce a piston blank, and (e) machining the piston blank further and/or finish-machining it to produce a piston.

Abstract translation: 用于内燃机的活塞通过以下步骤形成：（a）提供活塞基体的坯料，其具有外接合表面，内接合表面和在两个接合表面之间延伸的周向下冷却通道部分 ，（b）提供活塞环元件的坯件，其具有外连接表面，内接合表面和在两个接合表面之间延伸的周向上冷却通道部分，（c）在至少一个上形成周向加宽区域 所述加宽区域朝着相关的冷却通道部分延伸，（d）通过摩擦焊接，通过其接合表面将活塞基体的坯件与活塞环元件的坯料连接，以产生活塞坯料， 和（e）进一步加工活塞坯件和/或对其进行精加工以产生活塞。