公开(公告)号：US20180311731A1

公开(公告)日：2018-11-01

申请号：US15497832

申请日：2017-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John P. SPICER ,  Jason J. NOLTE ,  Thomas A. PERRY ,  Blair E. Carlson ,  Anil K. SACHDEV ,  HyungMin CHAE ,  Mark A. SMITH

IPC: B22F3/105 ,  B29C67/00 ,  B28B1/00 ,  B33Y30/00 ,  B33Y40/00

Abstract: An additive manufacturing system has a powder delivery system for presenting a powder material to a build chamber. A laser selectively sinters the powder material in the build chamber. The build chamber is presented in an annular configuration with the powder delivery system and laser arranged within a central portion thereof.

公开(公告)号：US20180085855A1

公开(公告)日：2018-03-29

申请号：US15273923

申请日：2016-09-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James G. SCHROTH ,  Thomas A. PERRY ,  Hongliang WANG ,  Chen ZHOU

IPC: B23K26/211

Abstract: A method of forming a weld interface between a first workpiece and a second workpiece includes arranging a reactive braze material at a first joining surface of the first workpiece. The reactive material is selected to react upon being heated to a temperature below the solidus temperature of the first and second workpieces to form a liquid-containing reaction product. Furthermore, an assembly is prepared of the first workpiece and the second workpiece with the first joining surface of the first workpiece and a second joining surface of the second workpiece separated by the reactive material. The second workpiece is then heated with a first laser beam following a first path and with a second laser beam following a second path.