System for monitoring and tracking tool and tool performance

• US 6,374,195 B1
• Filed: 06/29/1999
• Issued: 04/16/2002
• Est. Priority Date: 06/29/1999
• Status: Expired due to Term

• Current Assignee: FCA US LLC (Stellantis NV)
• Original Assignee: Daimler Chrysler Corporation (Mercedes-Benz Group AG)
• Inventors: Li, Wei, George, John A., Wortham, Karen
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): TSAI, CAROL S W
• Application Number:
  US09/342,963
• Time in Patent Office: 1,022 Days
• Field of Search: 702/33-36, 702/41, 702/108, 702/113, 702/114, 702/122, 702/123, 702/119, 702/155, 702/158, 702/182-185, 702/188, 702/FOR-123, 702/FOR.134, 702/FOR.135, 702/FOR.136, 702/FOR.145, 702/FOR.147, 702/FOR.170, 702/FOR.171, 700/174, 700/175, 700/176, 700/177, 700/179, 700/206, 700/236, 700/237, 221/1, 221/2, 221/7, 221/8, 221/13, 221/75, 221/76, 221/77, 221/102, 221/129, 221/131, 186/55, 186/56
• US Class Current: 702/182
• CPC Class Codes: G05B 19/40938 Tool management
• CPC Class Codes: G05B 2219/32422 Tool management and database management
• CPC Class Codes: G05B 2219/37229 Test quality tool by measuring time needed for machining
• CPC Class Codes: G05B 2219/37252 Life of tool, service life, decay, wear estimation
• CPC Class Codes: G05B 2219/37587 Count number of machining cycles, frequency use of tool
• CPC Class Codes: G05B 2219/49304 Tool identification, code
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A method for tracking and monitoring tools in a multi-user environment is provided. The method assigns a unique identification number to each tool which permits the tool to be tracked for purposes of performing operations on the tool, such as periodic performance verification testing and/or preventative maintenance. A user programs the frequency and time at which the operation is to be periodically performed on a tool, such as performance verification testing or preventative maintenance. The method generates routes which enable the operation to be scheduled and performed on selected tools. Data collected from the operation may be uploaded, permitting the method to monitor the performance and/or operation of the tool. In a preferred embodiment, the method compares tool performance to tool operation and calculates tool set-up parameters to tune the performance of the tool to desired levels.

Claims

1. The method for tracking tools in a multi-user environment, including the steps of:

providing an access station;

assigning an identification number to the tool;

checking out a tool at the access station;

recording information regarding the tool, the person checking out the tool, and the job being performed;

conducting a performance verification test on the tool;

analyzing the performance of the tool; and

wherein the step of analyzing the performance of the tool includes comparing the operation of the tool to the performance of the tool.

2. A method for tracking tools in a multi-user environment comprising the steps of:

providing an access station;

assigning an identification number to the tool;

recording information about the tool, the job to be performed and the specification under which the tool is to perform;

performing a first performance verification test to monitor the operation of the tool;

performing a second performance verification test to monitor the performance of the tool on the job; and

monitoring a relationship between the operation of the tool and the performance of the tool.

3. The method for tracking tools in a multi-user environment of claim 2, wherein the tool is a fastening tool, the first performance verification test monitors the fastening tool dynamically and the second performance verification test monitors the residual torque on a fastener fastened by the fastening tool.

4. The method for tracking tools in a multi-user environment of claim 3, further comprising the steps of:

determining a ratio of the dynamic load to the residual load;

multiplying the ratio and a specification target to obtain a tool set-up target; and

changing a setpoint of the tool to the tool set-up target.

5. The method for tracking tools in a multi-user environment of claim 2, wherein the first performance verification test monitors a linear dimension of the tool and the second performance verification test monitors an actual dimension on a workpiece related to the linear dimension.

6. The method for tracking tools in a multi-user environment of claim 5, wherein the tool is operable for pressing a component into a workpiece to a predetermined dimension and the second performance verification test monitors distance by which the component is pressed into the workpiece.

7. A method for tracking tools in a multi-user environment, including the steps of:

providing an access station;

assigning an identification number to the tool;

checking out a tool at the access station;

recording information regarding the tool, the person checking out the tool, and the job being performed;

recording the specification under which the tool is to perform;

recording process limits under which the tool is to operate;

recording information to schedule at least one operation to be performed on the tool, the at least one operation including a performance verification test;

generating a route for performing a performance verification test on the tool;

providing a programmable data collection unit;

downloading the route to program the programmable data collection unit;

conducting the performance verification test on the tool;

recording data from the performance verification test in the programmable data collection unit including the steps of;

performing a first test portion to monitor the operation of the tool;

performing a second test portion to monitor the performance of the tool on the job; and

monitoring a relationship between the performance of the tool and the performance of the tool on the job.

8. The method for tracking tools in a multi-user environment of claim 7, wherein the tool is a fastening tool, the first performance verification test monitors the dynamic load of the fastening tool and the second performance verification test monitors the residual load on a fastener fastened by the fastening tool.

9. A method for tracking tools in a multi-user environment, including the steps of:

providing an access station;

assigning an identification number to the tool;

checking out a tool at the access station;

recording information regarding the tool, the person checking out the tool and the job being performed;

recording the specification under which the tool is to perform;

recording process limits under which the tool is to operate;

recording information to schedule at least one operation to be performed on the tool, the at least one operation including a performance verification test;

generating a route for performing a performance verification test on the tool;

providing a programmable data collection unit;

downloading the route to program the programmable data collection unit;

conducting the performance verification test on the tool;

recording data from the performance verification test in the programmable data collection unit; and

generating a route for performing preventative maintenance on the tool.