Zhiyong Cedric Xia from 2736 Valley Oak Pl, San Jose, CA 95135, age 59, Phone: (734)3940547

Us Patents

Compressed-Radius Hem-Forming Process And Tool
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US Patent:

6810707, Nov 2, 2004
Filed:

May 10, 2002
Appl. No.:

10/063757
Inventors:

Peter A. Friedman - Ann Arbor MI
William Faitel - Chesterfield Township MI
Jaideep Samant - Chesterfield Township MI
Patrick Coughlin - Chesterfield Township MI
Phil Wiens - Chesterfield Township, CA
Doug Schrandt - Chesterfield Township MI
Craig Eugene Miller - Clinton Township MI
Zhiyong Cedric Xia - Canton MI
Assignee:

Ford Motor Company - Dearborn MI
Unova Industrial Automation Systems, Inc. - Warren MI
International Classification:

B21D 3902
US Classification:

72220, 2924358
Abstract:

A tool and process utilizing the tool for forming a compressed-radius hem on a sheet metal assembly is provided. A concave portion on the tool is formed by at least two surfaces that together define a cavity. A flange on the perimeter of an outer panel is initially formed to an approximate perpendicular angle and is then formed to about 45Â. In a final forming step, an intermediate portion of the flange is engaged by the cavity and is formed into a compressed-radius hem.

Method Of Modifying Stamping Tools For Spring Back Compensation Based On Tryout Measurements
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US Patent:

6947809, Sep 20, 2005
Filed:

Mar 5, 2003
Appl. No.:

10/248958
Inventors:

Feng Ren - Canton MI, US
Zhiyong Cedric Xia - Canton MI, US
Assignee:

Ford Global Technologies - Dearborn MI
International Classification:

G06F019/00
US Classification:

700163, 700 98, 700118
Abstract:

A method of developing a stamping die for a workpiece is provided, which includes the steps of stamping a workpiece in a current die. A measurement is made of the stamped workpiece to determine its profile. The profile is compared with the design intent workpiece to determine dimensional variance. If the variance is within predetermined limits, the development is complete. If the variance is beyond limits, a conceptual determination is made of the residual forces in the current die stamped workpiece when the current die stamped workpiece is restamped by a design intent die. This conceptual determination is carried out on a computer. From the determination of residual forces, a new current die is developed. The new current die then stamps the workpiece. The steps are repeated until the stamped workpiece profile is within predetermined limits.

Method For Modifying A Stamping Die To Compensate For Springback
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US Patent:

7117065, Oct 3, 2006
Filed:

Mar 31, 2006
Appl. No.:

11/278327
Inventors:

Zhiyong Cedric Xia - Canton MI, US
Feng Ren - Canton MI, US
Assignee:

Ford Global Technologies, LLC - Dearborn MI
International Classification:

G06F 19/00
G05B 11/01
G06G 7/48
US Classification:

700146, 700 30, 700 71, 703 7
Abstract:

A method for modifying a stamping die to compensate for springback includes the steps of stamping a first part using a base, or pre-existing die set, and creating a surrogate die having the shape of the first stamped part. These steps are followed by simulated stamping of a blank with the surrogate die, where the blank is shaped according to the desired finished part. Then, the base die is modified by mapping the forming stresses, from the stamped blank, to an indicator blank, which is allowed to relax and then is employed as a template for modification of the base die. Following this, the accuracy of the newly modified base die is determined by stamping a second part in the modified base die and by comparing a number of dimensions of the second part with a number of corresponding dimensions of the desired finished part.

Method For Determining Addendum And Binder Surfaces Of Springback Compensated Stamping Dies
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US Patent:

7464011, Dec 9, 2008
Filed:

Jan 26, 2006
Appl. No.:

11/307189
Inventors:

Feng Ren - Canton MI, US
Zhiyong Cedric Xia - Canton MI, US
Assignee:

Ford Global Technologies, LLC - Dearborn MI
International Classification:

G06F 17/50
G06F 19/00
US Classification:

703 2, 700 98, 700118, 700163
Abstract:

A method for determining compensated addendum and binder surfaces as part of a springback compensated stamping die for producing a stamped part includes modeling of the existing addendum surface and binder surface of the stamping die. The addendum and binder surfaces are modified according to a number of compensatory surface displacements and in-plane rotations required for springback compensation of the finished stamped part. Following this modification, the stamped part may be separated from the addendum and binder without a loss of dimensional accuracy.

Method For Simulating A Hydroforming Process
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US Patent:

7640144, Dec 29, 2009
Filed:

Jan 26, 2006
Appl. No.:

11/307192
Inventors:

Feng Ren - Canton MI, US
Zhiyong Cedric Xia - Canton MI, US
Dan Zeng - Canton MI, US
Assignee:

Ford Global Technologies - Dearborn MI
International Classification:

G06F 17/50
B21D 24/00
US Classification:

703 2, 703 1
Abstract:

A method for simulating a hydroforming process includes modeling a virtual hydroforming die and a virtual tubular workpiece. The virtual workpiece is placed within the die after the die has been expanded. The die is then contracted to a finished size while the workpiece is deformed into a non-circular cross section in contact with the virtual die. The workpiece is subsequently pressurized to simulate production of a finished part.

Computer-Implemented Method And System For Determining A Material Utilization For Part Assemblies
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US Patent:

8249740, Aug 21, 2012
Filed:

Oct 20, 2009
Appl. No.:

12/581939
Inventors:

Raja Shekar Sohmshetty - Canton MI, US
Shawn Michael Morgans - Chelsea MI, US
Zhiyong Cedric Xia - Canton MI, US
Lawrence J. Dupuis - Grosse Ile MI, US
Amir T. Chator - Farmington Hills MI, US
Assignee:

Ford Motor Company - Dearborn MI
International Classification:

G06F 19/00
US Classification:

700171, 700 28, 700 97
Abstract:

Various embodiments may include determining a material utilization for one or more assemblies having a plurality of parts. Offal data for one or more parts comprising one or more part assemblies and a blank material utilization status for each of the one or more part assemblies may be received. The blank material utilization status for the one or more part assemblies may be based on a blank material utilization status for each of the one or more parts. The offal data may be standardized to obtain standardized offal data. One or more offal utilization assignments for the part assemblies having a plurality of parts may be determined based on the standardized offal data and the blank material utilization status for the part assemblies. The offal utilization assignments may then be transmitted for assignment to the one or more part assemblies.

Method Of Incrementally Forming A Workpiece
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US Patent:

8302442, Nov 6, 2012
Filed:

Jul 29, 2010
Appl. No.:

12/845950
Inventors:

Vijitha Senaka Kiridena - Ann Arbor MI, US
Zhiyong Cedric Xia - Canton MI, US
Assignee:

Ford Global Technologies, LLC - Dearborn MI
International Classification:

B21D 3/02
B21D 11/02
US Classification:

72115, 72 67, 72 75, 72122, 72124, 72125, 723792
Abstract:

A method of incrementally forming a workpiece. The method includes determining a desired workpiece geometry, generating a tool path in which a feature is formed outwardly from a point that is disposed a maximum distance from a reference position, and incrementally forming the workpiece.

System And Method For Incrementally Forming A Workpiece
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US Patent:

8322176, Dec 4, 2012
Filed:

Feb 11, 2009
Appl. No.:

12/369336
Inventors:

Carl Frederick Johnson - Belleville MI, US
Vijitha Senaka Kiridena - Ann Arbor MI, US
Feng Ren - Canton MI, US
Zhiyong Cedric Xia - Canton MI, US
Assignee:

Ford Global Technologies, LLC - Dearborn MI
International Classification:

B21D 17/04
B21D 3/02
US Classification:

72 75, 72115
Abstract:

A system and method for incrementally forming a workpiece. A first manipulator is configured to move a first tool in multiple directions along a first surface of a workpiece. A second manipulator is configured to move a second tool in multiple directions along a second surface of the workpiece. The first and second tools move along first and second predetermined paths of motion and exert force to form the workpiece.