Machine tool maintenance system

• US 6,615,103 B2
• Filed: 06/01/2001
• Issued: 09/02/2003
• Est. Priority Date: 06/06/2000
• Status: Expired due to Fees

• Current Assignee: MORI Seiki Company Limited (Dmg Mori Co., Ltd.), Intelligent Manufacturing Systems International
• Original Assignee: Intelligent Manufacturing Systems International, MOKI Seiki Company Limited
• Inventors: Fujishima, Makoto, Akamatsu, Yoshiaki
• Primary Examiner(s): Picard, Leo
• Assistant Examiner(s): Lee, Douglas S.
• Application Number:
  US09/870,468
• Publication Number:
  US 20020013639A1
• Time in Patent Office: 823 Days
• Field of Search: 700/174-181, 709/200-203, 702/183-184, 408/6
• US Class Current: 700/175
• CPC Class Codes: B23Q 41/08 Features relating to maintenance of efficient operation
• CPC Class Codes: G05B 19/4065 Monitoring tool breakage, life or condition
• CPC Class Codes: G05B 2219/31205 Remote transmission of measured values from site, local to host
• CPC Class Codes: G05B 2219/32234 Maintenance planning
• CPC Class Codes: G05B 2219/37252 Life of tool, service life, decay, wear estimation
• 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: Y02P 90/80 Management or planning

Abstract

The present invention provides a maintenance system, which centrally performs a management operation on the life expectancies of expendable components of machine tools (21) provided in a plant for systematic maintenance of the machine tools (21). The maintenance system comprises a plurality of machine tools (21) and a management unit (20) connected to the machine tools (21). The management unit (20) comprises: a life expectancy determining section (92) for determining the degrees of wear of driver mechanisms on the basis of data indicative of the operating conditions of the driver mechanisms received from a controller (80) provided in each of the machine tools (21); a data storage section (91) for storing data indicative of the wear degrees determined by the life expectancy determining section (92), and an output section (93, 95) for outputting information on the wear degrees stored in the data storage section (91). The wear degrees of the respective driver mechanisms are centrally managed, so that a comprehensive maintenance plan can easily be formulated for the machine tools (21).

Claims

1. A machine tool maintenance system comprising:

a plurality of machine tools each including a plurality of driver mechanisms and a controller for controlling operations of the driver mechanisms; and

a management unit connected to the plurality of machine tools;

wherein the controller of each of the machine tools comprises a life expectancy determining section for determining degrees of wear of the respective driver mechanisms on the basis of operating conditions of the respective driver mechanisms;

wherein the management unit comprises a data storage section for receiving data indicative of the wear degrees of the respective driver mechanisms determined by the life expectancy determining section of each of the machine tools and storing the data of the wear degrees, and an output section for outputting information on the wear degrees stored in the data storage section,

wherein the life expectancy determining section estimates end-of-life times at which service lives of the respective driver mechanisms end, on the basis of the determined wear degrees.

2. A machine tool maintenance system as set forth in claim 1,

wherein the data storage section of the management unit receives data indicative of the wear degrees and the estimated end-of-life times from the life expectancy determining section, and stores the data,

wherein the output section of the management unit outputs information on the wear degrees and the estimated end-of-life times stored in the data storage section.

5. A machine tool maintenance system as set forth in any of claims 1 to 4,

wherein the management unit includes at least one management unit provided on the side of a user of the machine tools and connected via a network to a management unit provided on the side of a supplier of the machine tools,

wherein the supplier side management unit comprises a data storage section for storing data indicative of life expectancies of the respective driver mechanisms received from the user side management unit, and an output section for outputting information on the life expectancies stored in the data storage section.

3. A machine tool maintenance system comprising:

a plurality of machine tools each including a plurality of driver mechanisms and a controller for controlling operations of the respective driver mechanisms; and

a management unit connected to the plurality of machine tools;

wherein the management unit comprises a life expectancy determining section for determining degrees of wear of the respective driver mechanisms on the basis of data indicative of operating conditions of the respective driver mechanisms received from the controller of each of the machine tools, a data storage section for storing data indicative of the wear degrees determined by the life expectancy determining section, and an output section for outputting information on the wear degrees stored in the data storage section,

wherein the life expectancy determining section estimates end-of-life times at which service lives of the respective driver mechanisms end, on the basis of the determined wear degrees.

4. A machine tool maintenance system as set forth in claim 3,

wherein the data storage section stores data indicative of the wear degrees and the estimated end-of-life times,

wherein the output section outputs information on the wear degrees and the estimated end-of-life times stored in the data storage section.

6. A machine tool maintenance system comprising:

a plurality of machine tools each including a plurality of driver mechanisms and a controller for controlling operations of the respective driver mechanisms;

at least one management unit provided on the side of a user of the machine tools and connected to the plurality of machine tools; and

a management unit provided on the side of a supplier of the machine tools and connected to the user side management unit;

wherein the supplier side management unit comprises a life expectancy determining section for determining degrees of wear of the respective driver mechanisms on the basis of data indicative of operating conditions of the respective driver mechanisms received from the controller via the user side management unit, a data storage section for storing data indicative of the wear degrees determined by the life expectancy determining section, and an output section for outputting information on the wear degrees stored in the data storage section,

wherein the life expectancy determining section determines the wear degrees of the respective driver mechanisms and estimates end-of-life times at which service lives of the respective driver mechanisms end, on the basis of the determined wear degrees.

7. A machine tool maintenance system as set forth in claim 6,

wherein the data storage section stores data indicative of the wear degrees determined by the life expectancy determining section and the estimated end-of-life times,

wherein the output section outputs information on the wear degrees and the estimated end-of-life times stored in the data storage section.