Machine tool spindle diagnostic method and spindle diagnostic device
A spindle diagnostic method and device for machine tools continuously monitor vibrations and loads to diagnose bearing issues, ensuring timely intervention and preventing severe failures.
JP7738493B2Active Publication Date: 2025-09-12OKUMA CORP
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Patent Information
- Application Number
- JP2022007396
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-01-20
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2042-01-20
AI Technical Summary
Technical Problem
Existing spindle diagnostic methods fail to continuously monitor bearing conditions in machine tools, leading to overlooked issues and varying times to repair, with potential for rapid bearing failure due to foreign matter intrusion or lubrication issues.
Method used
A method and device that continuously monitor spindle vibrations and loads, diagnosing bearing failures by detecting vibration exceeding a normal range, checking for overload history, and assessing speed changes to identify causes such as overload or lubrication issues.
Benefits of technology
Enables constant diagnosis of bearing problems, allowing timely intervention to prevent severe failures by identifying the cause of spindle abnormalities.
✦ Generated by Eureka AI based on patent content.
Abstract
To enable a cause of occurrence of an abnormality relating to a bearing of a main shaft to be diagnosed all the time without overlooking.SOLUTION: An NC system executes, as a diagnosis method of a main shaft, vibration determination steps (S11 and S12) of, when vibration of the main shaft detected by a vibration sensor exceeds a predetermined normal range, determining whether the vibration is vibration attributable to a bearing, and occurrence cause diagnosis steps (S13 to S17) of, when the vibration of the main shaft is the vibration attributable to the bearing, diagnosing a cause of occurrence according to whether a condition change relevant to the bearing is present.SELECTED DRAWING: Figure 2
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