Li Jie Zhang

6785640, Aug 31, 2004

Aug 7, 2000

09/633212

Yun Lu - Troy MI
Russell J Navarre - Farmington Hills MI
Li Zhang - Rochester Hills MI

DaimlerChrysler Corporation - Auburn Hills MI

G06G 748

703 7, 703 1, 703 2, 700 98, 700108, 345419

The present invention provides a method for evaluating a surface quality of a simulated stamping which includes the steps of obtaining a CAD model of a desired part, calculate and display at least one image of true reflect line on the CAD model, obtaining a blank mesh representative of the part before the part is formed, and processing the blank mesh with a springback simulation software to obtain a deformed finite element analysis springback blank. True reflect lines are then calculated and displayed on the deformed FEA springback blank, and the reflect lines are compared with the true reflect lines on the CAD model to determine variance of the deformed springback blank with the CAD model.

20210046799, Feb 18, 2021

Mar 26, 2020

16/831382

- Southfield MI, US
Brian BELANGER - Farmington Hills MI, US
Li ZHANG - Ann Arbor MI, US

B60H 1/00

An HVAC case for a vehicle including an airflow outlet defining a first outlet area having a first width and a first depth, and a second outlet area having a second width and a second depth. The first outlet area is larger than the second outlet area. A ramped surface is adjacent to the second outlet area. An airflow control door is movable to an open position, a partially closed position in which the airflow control door obstructs airflow through the first outlet area and permits airflow through the second outlet area, and a fully closed position in which the airflow control door obstructs airflow through both the first outlet area and the second outlet area.

20200307520, Oct 1, 2020

Mar 10, 2020

16/814188

- Southfield MI, US
Kyle STABILE - Livonia MI, US
Nicholaus SPUNAR - Southfield MI, US
Li ZHANG - Southfield MI, US

B60S 1/02
B60H 1/34
B60S 1/54

An HVAC case configured to heat airflow for a vehicle HVAC system. The HVAC case has a defrost outlet, a primary demist outlet, a secondary demist outlet, and an airflow control door. The airflow control door is configured to control airflow through each one of the defrost outlet, the primary demist outlet, and the secondary demist outlet.

20180285488, Oct 4, 2018

Mar 30, 2017

15/475069

- Livermore CA, US
Li Zhang - Rochester Hills MI, US

G06F 17/50
G06F 17/11

Systems and methods of designing geometry of a tool set in a numerical simulation of sheet metal forming operations including springback compensation are disclosed. Computerized die face model representing an initial geometry of a tool set is generated for forming a sheet metal work-piece to a part's desired geometry. Numerically-simulated deep drawing operation, optional trimming operation and a springback effect are conducted to obtained a trial geometry of the part. A deviation between the trial geometry and the desired geometry is obtained. When the deviation is outside of tolerance, computerized die face model is regenerated according to a modified geometry of the tool set that includes an estimated amount of springback compensation derived from the deviation due to springback together with a node adjustment scheme for ensuring model conformity along the boundary line. Final modified geometry of the tool set is iteratively obtained.

20180067468, Mar 8, 2018

Nov 8, 2017

15/806647

- Livermore CA, US
Li Zhang - Rochester Hills MI, US

G05B 19/402
G06F 17/50

Physical tools for trimming operations in forming of a sheet-metal part are set up based on numerically-simulated structural behaviors. FEA model representing a stamped sheet metal before trimming and a trimming operation setup are received. Each trim-steel contains a set of cutting-edge nodes associated with trim vector. At least one trim line is established by projecting cutting-edge nodes onto the FEA model according to the trim vector. Numerically-constrained node-pairs along the trim line are created at intersections with edges of crossed finite elements. FEA model is modified by splitting the crossed finite elements to preserve original geometry and to ensure numerical stability. New finite elements are defined using one of the nodes in corresponding node-pairs such that no finite element straddles the trim line. At each solution cycle of a time-marching simulation of trimming operations, simulated structural behaviors are obtained as the scrap portion(s) deforms and falls accordingly.

20160210385, Jul 21, 2016

Jan 15, 2015

14/597937

- Livermore CA, US
Li Zhang - Rochester Hills MI, US

G06F 17/50

FEA model representing a stamped sheet metal before trimming and a trimming operation setup are received. Each trim steel contains a set of cutting-edge nodes associated with a trim vector. At least one trim line is established by projecting cutting-edge nodes onto the FEA model according to the trim vector. Numerically-constrained node-pairs along the trim line are created at intersections with edges of crossed finite elements. The FEA model is modified by splitting crossed finite elements to preserve the original geometry and to ensure numerical stability. New finite elements are defined using one of the nodes in corresponding node-pairs such that no finite element straddles the trim line. At each solution cycle of a time-marching simulation of trimming operations, the numerical constraint is released for each node-pair determined to be reached by one of the cutting-edge nodes. Simulated structural behaviors are obtained as the scrap portion(s) deforms and falls accordingly.

20160139885, May 19, 2016

Jan 28, 2016

15/008571

- Armonk NY, US
Anshul Gandhi - Huntington Station NY, US
Alexei Karve - Mohegan Lake NY, US
Andrzej Kochut - Croton-on-Hudson NY, US
Li Zhang - Yorktown Heights NY, US

G06F 9/44
H04L 29/08

A method for scaling a cloud infrastructure, comprises receiving at least one of resource-level metrics and application-level metrics, estimating parameters of at least one application based on the received metrics, automatically and dynamically determining directives for scaling application deployment based on the estimated parameters, and providing the directives to a cloud service provider to execute the scaling.

20160142265, May 19, 2016

Jan 28, 2016

15/008552

- Armonk NY, US
Anshul Gandhi - Huntington Station NY, US
Alexei Karve - Mohegan Lake NY, US
Andrzej Kochut - Croton-on-Hudson NY, US
Li Zhang - Yorktown Heights NY, US

H04L 12/24
G06F 9/455

A method for scaling a cloud infrastructure, comprises receiving at least one of resource-level metrics and application-level metrics, estimating parameters of at least one application based on the received metrics, automatically and dynamically determining directives for scaling application deployment based on the estimated parameters, and providing the directives to a cloud service provider to execute the scaling.