Cutting Blade Mounting Control for Misalignment and Galling Prevention
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Solution Overview
Problem
The existing cutting apparatuses face issues with misalignment between the boss portion of the blade mount and the insertion hole of the cutting blade due to temperature changes and shaft degradation, leading to potential galling and future trouble in the blade changing unit or blade mount during repeated blade changes.
Innovation Solution
A cutting apparatus with a control unit that includes a measuring portion to detect the force applied to the moving portion of the blade changing unit, allowing for determination of the contact between the boss portion and the insertion hole, preventing forced mounting and demounting by monitoring torque, voltage, load, speed, torque, deviation, and position signals from motors or sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade changing unit repeatedly mounts and demounts cutting blades using the holding portion and boss portion, then the productivity is improved, but misalignment occurs due to temperature changes and shaft degradation causing galling
Solution Approach 1:
The patent applies preliminary action by detecting the contact between the boss portion and insertion hole edge before forced mounting occurs. The measuring portion monitors the force applied to the moving portion during blade mounting/demounting operations, and when abnormal force indicating misalignment is detected, the control unit stops the operation before galling can occur. This preventive approach allows repeated blade changes to maintain both productivity and reliability.
2Ease of operation
If the holding portion is moved toward the blade mount by operating an air cylinder to mount the cutting blade, then the ease of operation is improved, but contact between the boss portion and insertion hole edge cannot be detected until the holding portion is caught by the boss portion
Solution Approach 1:
The patent implements feedback by using the measuring portion to continuously monitor the force applied to the moving portion during the blade mounting/demounting process. When the boss portion contacts the insertion hole edge, the force changes abnormally, which is detected by the measuring portion. The control unit receives this feedback and stops the operation before the holding portion is caught by the boss portion, preventing damage while maintaining automatic operation.
3Manufacturing precision
If the boss portion is forcibly inserted into the insertion hole when contact occurs, then the manufacturing precision is compromised, but future trouble in the blade changing unit or blade mount is prevented only by detection
Solution Approach 1:
The patent applies preliminary anti-action by implementing a detection and stop mechanism that prevents the harmful effect of galling before it occurs. The measuring portion detects abnormal force indicating misalignment between the boss portion and insertion hole, and the control unit stops the mounting operation before forced insertion can cause galling. This preventive measure protects both the blade changing unit and blade mount from future trouble while maintaining manufacturing precision.
Data Source
AI summary
A cutting apparatus includes a blade changing unit demounting an old cutting blade from a blade mount and mounting a new cutting blade to the blade mount. The blade changing unit includes a blade holder for holding a support base of each cutting blade and a moving portion for moving the blade holder in the axial direction of a boss portion of the blade mount in the condition where each cutting blade is held by the blade holder, thereby mounting the new cutting blade to the boss portion or demounting the old cutting blade from the boss portion. The cutting apparatus further includes a control unit controlling the blade changing unit. The control unit measures a signal indicating a force applied to the moving portion in mounting or demounting, and determines the condition of the blade changing unit and blade mount according to the signal measured by the measuring portion.