Invention Grant
- Patent Title: Method for producing a piston for an internal combustion engine and piston produced by means of said method
-
Application No.: US15311514Application Date: 2015-05-13
-
Publication No.: US10174710B2Publication Date: 2019-01-08
- Inventor: Karlheinz Bing , Daniel Mock , Mathias Petrowitsch
- Applicant: Mahle International GmbH
- Applicant Address: DE
- Assignee: Mahle International GmbH
- Current Assignee: Mahle International GmbH
- Current Assignee Address: DE
- Agency: Fishman Stewart PLLC
- Priority: DE102014007127 20140516
- International Application: PCT/EP2015/000980 WO 20150513
- International Announcement: WO2015/172880 WO 20151119
- Main IPC: F02F3/00
- IPC: F02F3/00 ; B23K26/28 ; B23K35/02 ; F02F3/20 ; B23K26/24 ; B23P15/10

Abstract:
A method for producing a piston may include aligning at least two piston components along corresponding joining surfaces, activating a laser designed for deep-welding, and aligning a laser beam with a starting point. The method may then include increasing a power density of the laser beam over a first defined path along the joining surfaces to produce a weld seam with an increasing weld seam depth, deep welding along the joining surfaces to produce a deep weld seam with a substantially constant weld seam depth up to a defined end point, and reducing the power density over a second defined path to produce a weld seam with a decreasing weld seam depth. The method may further include overwelding at least part of at least one of the first and second defined paths by a laser designed for heat conduction welding to produce at least one heat conduction weld seam.
Public/Granted literature
Information query