Method and system for reducing errors in a manufacturing process

• US 6,732,005 B1
• Filed: 03/19/2003
• Issued: 05/04/2004
• Est. Priority Date: 03/19/2003
• Status: Active Grant

• Current Assignee: Ford Motor Company
• Original Assignee: Ford Motor Company
• Inventors: Palo, Mike, Soleimani, Saeid, Fetterman, Donald Edward, Odett, David, Haag, Gavin, Nicholson, Jim Mathew, Bobkin, Aaron
• Primary Examiner(s): PALADINI, ALBERT WILLIAM
• Application Number:
  US10/249,158
• Time in Patent Office: 412 Days
• Field of Search: 700/116, 700/115, 297/07, 297/10, 297/11, 702/35
• US Class Current: 700/115
• CPC Class Codes: G05B 19/41805 characterised by assembly
• CPC Class Codes: G05B 2219/31027 Computer assisted manual assembly CAA, display operation, tool, result
• CPC Class Codes: G05B 2219/31056 Selection of assembly processes, preferred assembly sequences
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
• CPC Class Codes: Y10T 29/53048 Multiple station assembly or disassembly apparatus

Abstract

A method and system (10) for reducing errors in a vehicle manufacturing process is provided. The system is a non-segmented network that includes a plurality of servers (30, 40, 46, 48) for storing build data and transmitting the data to a tracking controller (20). The tracking controller (20) identifies the assembly (18) entering a manufacturing zone (14) and generates positioning information related to the assembly as it passes through the zone (14). The tracking controller (20) is electronically coupled to a series of local I/O interfaces (32) for transmitting the identity, the position information, and the build data of the assembly (18) thereto. Each local I/O interface (32) has one or more I/O manufacturing tools (34, 36) coupled thereto for allowing an operator to perform an assembly task pursuant to the build data. In addition, the I/O manufacturing tools (34, 36) detect whether a successful build condition or an unsuccessful build condition results from performance of the assembly task.

Claims

1. A system for manufacturing an assembly within a plant on a conveyor line comprising:

a non-segmented network including;

a plurality of servers for storing data, said plurality of servers including a build data server for storing build data;

at least one of a sensor and an operator for detecting an identity and a position of the assembly on the conveyor line, said conveyor line having a plurality of manufacturing zones and a plurality of stations within each of said plurality of manufacturing zones,

a tracking controller electronically coupled to said plurality of servers for receiving data therefrom, said tracking controller for receiving said identity and said position of the assembly on the conveyor line from at least one of said sensor and said operator;

at least one local I/O interface electronically coupled to said tracking controller and said build data server, said at least one local I/O interface receiving said data, said identity, and said position of the assembly from said controller, said at least one local I/O interface receiving said build data from said build data server for instructing said operator to perform an assembly task; and

at least one I/O manufacturing tool electronically coupled to said at least one I/O interface, said at least one I/O manufacturing tool being utilized by said operator for performing said assembly task pursuant to said identity and said build data associated with the assembly, said at least one I/O manufacturing tool for detecting at least one of a successful build condition and an unsuccessful build condition;

wherein said at least one local I/O interface comprises an embedded computer and a multi-colored stack light, said embedded computer having a touch screen and a plurality of non-moving parts, said multi-colored stack light electronically coupled to said embedded computer for indicating a build status to said operator.

2. The system of claim 1 wherein said non-segmented network is an Ethernet network.

3. The system of claim 1 wherein

said build data server is utilized for storing vehicle build information and transmitting vehicle build information related to said identity of the assembly to said at least one I/O interface.

4. The system of claim 1 wherein said plurality of servers comprises:

a quality control server electronically coupled to said at least one I/O manufacturing tool, said quality control server for receiving an unsuccessful build message from said at least one I/O manufacturing tool and prompting an operator to correct said unsuccessful build condition.

5. The system of claim 1 wherein said plurality of servers comprises:

a monitoring server electronically coupled to said tracking controller and said at least one I/O interface, said at least one manufacturing tool, said monitoring server for detecting at least one of an active operation condition and an equipment failure condition.

6. The system of claim 1 wherein said plurality of servers comprises:

an error proofing server electronically coupled between said at least one I/O interface and said at least one manufacturing tool, said error proofing server for generating a status report of at least one of said non-segmented network and the assembly.

7. The system of claim 1 wherein said tracking controller comprises:

a tracking I/O interface electronically coupled to said plurality of servers, said tracking I/O interface being an embedded computer with a touch screen, said embedded computer including a plurality of non-moving parts; and

said sensor coupled to said tracking controller;

wherein said sensor includes a position encoder and a primary identifier mechanism, said position encoder electronically coupled to said tracking I/O interface for detecting a conveyor line position said primary identifier mechanism electronically coupled to said tracking I/O interface for identifying the assembly.

8. The system of claim 7 further comprising:

a secondary identifier mechanism for identifying the assembly when said primary identifier mechanism fails to identify the assembly.

9. The system of claim 1 wherein said at least one I/O manufacturing tool is at least one of:

a torque tool for repeatedly applying a predetermined torque value and measuring an actual torque value applied to the assembly; and

a part pick light array for prompting an operator to pick a predetermined part and detecting an actual pick by said operator.

10. A method for implementing the network recited in claim 1 for manufacturing an assembly within a plant on a conveyor line, comprising:

utilizing at least one of a sensor and an operator for identifying the assembly;

receiving build data related to an identity of the assembly, said build data being stored in a build data server;

determining an assembly position of the assembly on the conveyor line, said conveyor line having a plurality of manufacturing zones and a plurality of stations within each of said plurality of zones;

utilizing a local I/O interface for prompting an operator to perform an assembly task related to the build data;

activating a multi-stack light according to a predetermined lighting pattern for notifying said operator of a build status of the assembly;

determining at least one of a successful build condition and an unsuccessful build condition;

determining at least one of an in-station repairable condition and an in-station irreparable condition when said unsuccessful build condition exists;

repairing the assembly when said in-station repairable condition exists;

retaining the assembly within the plant when said in-station irreparable condition exists; and

releasing the assembly from said station.

11. The method of claim 10 further comprising:

determining at least one of a faulty tool condition and a non-faulty tool condition when said unsuccessful build condition exists.

12. The method of claim 10 wherein identifying the assembly comprises at least one of:

scanning a bar code attached to the assembly;

detecting movement of the assembly into at least one of the stations and the manufacturing zones; and

prompting said operator to manually input an identification of the assembly into the network.

13. The method of claim 10 wherein determining an assembly position of the assembly comprises:

detecting a conveyor position of the assembly line; and

detecting a movement of the assembly into at least one of the stations and the manufacturing zones.

14. The method of claim 10 wherein prompting an operator to perform said assembly task comprises at least one of:

displaying an assembly task message on said local I/O interface;

activating a multi-stack light according to a predetermined lighting pattern; and

activating a part pick light array to indicate a predetermined part for an operator to select.

15. A method for implementing the network recited in claim 1 for manufacturing an assembly within a plant on a conveyor line, comprising:

identifying the assembly;

receiving build data related to the assembly;

determining an assembly position of the assembly on the conveyor line, said conveyor line having a plurality of manufacturing zones and a plurality of stations within each of said plurality of zones;

utilizing a local I/O interface for prompting an operator to perform an assembly task related to the build data;

determining at least one of a correct assembly condition and an incorrect assembly condition;

determining at least one of a listed assembly condition and a non-listed assembly condition when said incorrect assembly condition exists;

selecting a vehicle identity when said listed assembly condition exists;

determining a no-read condition;

inputting an identification of the assembly when said non-listed assembly condition and said no-read condition exist; and

wherein prompting said operator to perform said assembly task comprises at least one of displaying an assembly task message on said local I/O interface, activating a multi-stack light according to a predetermined lighting pattern, and activating a part pick list array to indicate a predetermined part for said operator to select.

16. The method of claim 15 further comprising:

notifying said operator of a build status of the assembly, wherein notifying comprises activating a multi-stack light according to a predetermined lighting pattern.

17. The method of claim 15 wherein identifying the assembly comprises at least one of:

scanning a bar code attached to the assembly;

detecting movement of the assembly into at least one of a station and a manufacturing zone; and

manually inputting an identification of the assembly into the network.