公开(公告)号：US20190061053A1

公开(公告)日：2019-02-28

申请号：US15685290

申请日：2017-08-24

Applicant: GM Global Technology Operations LLC

Inventor： David Yang ,  Justin Wolsker ,  Blair Carlson ,  Wu Tao

IPC: B23K26/08 ,  B23K26/244 ,  B23K26/10

Abstract: A method of laser brazing a metal workpiece assembly along a joint seam established between a first metal workpiece and a second metal workpiece involves advancing a laser beam along the joint seam while feeding a filler wire into the laser beam to melt a leading end of the filler wire, which is impinged by the laser beam, to produce and dispense molten filler material within and along the joint seam. The dispensed molten filler material solidifies behind the laser beam into a braze joint. Additionally, as part of the method, a position of a focal point of the laser beam relative to the leading end of the filler wire is repeatedly fluctuated during advancement of the laser beam along at least part of the joint seam.

公开(公告)号：US11288424B2

公开(公告)日：2022-03-29

申请号：US16451513

申请日：2019-06-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC ,  UT-Battelle, LLC

Inventor： Jian Chen ,  Hui Huang ,  Zhili Feng ,  Blair Carlson ,  Hui-Ping Wang ,  Wayne Cai

IPC: G06F30/23 ,  G06F17/11 ,  G06T19/00 ,  G06T15/00

Abstract: A method for accelerating an explicit finite element analysis (FEA) simulation of a modeled system or process includes performing an initial iteration of the FEA simulation according to a baseline time interval via an FEA computing network, and calculating a criteria ratio of a predetermined set of scaling criteria for the modeled system or process. The method includes determining a time-scaling factor using the criteria ratio via the FEA computing network as a function of the criteria ratio, and then applying the time-scaling factor to the baseline time interval to generate a scaled time interval. The scaled time interval accelerates simulation time of the FEA simulation. The method includes performing a subsequent iteration of the explicit FEA simulation at the scaled time interval using the FEA computing network. The process continues for subsequent iterations, with the time-scaling factor adapting with each iteration.

公开(公告)号：US20190061055A1

公开(公告)日：2019-02-28

申请号：US15684398

申请日：2017-08-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Yang ,  Wu Tao ,  Blair Carlson

IPC: B23K26/244 ,  B23K26/046 ,  B23K26/082 ,  B23K26/322

Abstract: A method of laser welding together two or more overlapping metal workpieces (12, 14 or 12, 504, 14) that define a welding region (16) in which at least a portion of an accessible top surface (20, 120, 220, 520) of a workpiece stack-up (10, 110, 210, 510) is curved or angled includes advancing a laser beam (24) along a beam travel pattern (74) that at least partially lies on the portion of the top surface that is curved or angled while maintaining a constant focal distance (64) of the laser beam during such advancing travel. The beam travel pattern may be projected onto a curved portion (20″, 220″) of the top surface, an angled portion (120″) of the top surface, or two or more portions (20′, 20″, 120′, 120″, 220′, 220″, 220′″) of the top surface that lack planarity.

公开(公告)号：US20170291246A1

公开(公告)日：2017-10-12

申请号：US15478745

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/11 ,  B23K11/34 ,  B23K11/20

CPC classification number: B23K11/115 ,  B23K11/20 ,  B23K11/34 ,  B23K2103/20

Abstract: A method of resistance spot welding an aluminum workpiece and an adjacent overlapping steel workpiece is disclosed in which a source of a reactive metal in a diffusible state is located along a faying interface of an aluminum workpiece and an adjacent overlapping steel workpiece. The source of the reactive metal in a diffusible state may take on a variety of forms including (1) a composite adhesive layer that includes reactive particles dispersed throughout a structural thermosetting adhesive matrix or (1) a reactive alloy layer that confronts and is in proximate contact with a faying surface of the aluminum workpiece. Once the source of a reactive material in a diffusible state is in place and the workpiece stack-up is assembled, an electrical current is passed through the workpiece stack-up and between a set of opposed welding electrodes at a weld zone to ultimately produce a weld joint.

公开(公告)号：US10675703B2

公开(公告)日：2020-06-09

申请号：US15478684

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/20 ,  B23K11/11 ,  B23K11/18 ,  F16B5/08 ,  B23K103/20

Abstract: A weld joint is disclosed that weld bonds together an aluminum workpiece and a steel workpiece. The weld joint includes an aluminum weld nugget, an intermetallic layer, and an annular ring of aluminide particles that is selected from the group consisting of nickel aluminide particles, iron aluminide particles, and a combination thereof. The annular ring of aluminide particles extends upwards from a weld bond surface of the weld joint such that the annular ring of aluminide particles extends radially inwardly into the aluminum weld nugget and protects the weld bond surface of the weld joint against crack propagation that may originate from a notch root of the weld joint.

公开(公告)号：US20170291247A1

公开(公告)日：2017-10-12

申请号：US15478684

申请日：2017-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： David Sigler ,  Blair Carlson ,  Surender Maddela

IPC: B23K11/20 ,  B23K11/18 ,  F16B5/08

CPC classification number: B23K11/20 ,  B23K11/115 ,  B23K11/185 ,  B23K2103/20 ,  F16B5/08

Abstract: A weld joint is disclosed that weld bonds together an aluminum workpiece and a steel workpiece. The weld joint includes an aluminum weld nugget, an intermetallic layer, and an annular ring of aluminide particles that is selected from the group consisting of nickel aluminide particles, iron aluminide particles, and a combination thereof. The annular ring of aluminide particles extends upwards from a weld bond surface of the weld joint such that the annular ring of aluminide particles extends radially inwardly into the aluminum weld nugget and protects the weld bond surface of the weld joint against crack propagation that may originate from a notch root of the weld joint.