Cutting Tool Contact Positioning for Accurate Origin Setting
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Solution Overview
Problem
Conventional cutting apparatuses require measuring instruments for accurate origin setting, which increases costs and is undesirable.
Innovation Solution
A cutting apparatus with a rotation mechanism, feed mechanism, and controller that uses contact sensor detection information and time-series data from drive motors to determine the relative positional relationship between the cutting tool and the to-be-cut object without the need for measuring instruments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measuring instrument is installed to measure the cutting edge position, then the origin setting accuracy is improved, but the cost increases
Solution Approach 1:
The cutting tool itself serves as the measuring instrument by using its own cutting edge to contact the workpiece and detect contact through the drive motor's detection values, eliminating the need for separate measuring instruments and reducing costs while maintaining measurement accuracy
Solution Approach 2:
The patent replaces the mechanical measuring instrument system with an electrical detection system that uses the drive motor's existing sensors and detection values to measure the cutting edge position and contact timing, achieving the same function without additional mechanical components
2Measurement precision
If a contact sensor is used to detect contact timing, then the origin setting accuracy is improved, but the device complexity increases
Solution Approach 1:
The drive motor's detection system performs multiple functions: it both drives the cutting tool and detects contact timing, eliminating the need for separate contact sensors and reducing system complexity while maintaining detection accuracy
Solution Approach 2:
The patent merges the drive motor and detection system into a single integrated unit, where the same motor that provides mechanical power also provides detection functionality through its built-in sensors, reducing the number of separate components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate origin setting without the need for additional measuring instruments, reducing costs and improving machining precision.
Implementation Method 1
a vibration sensor that detects contact vibrations when the contact and the rotary tool come into contact with each other
Implementation Method 2
a mechanism by which, when the cutting edge comes into contact with the to-be-contacted object, an electric circuit is closed to allow a current to flow is used to detect the position of the moving device for cutting tool at the time of current flow
Data Source
AI summary
A controller uses detection information of a contact sensor or time-series data of a detection value related to a drive motor included in a rotation mechanism and/or a feed mechanism to acquire a coordinate value when a cutting tool comes into contact with a to-be-cut object or a component. The controller determines a relative positional relationship between the cutting tool and a rotation center of the to-be-cut object based on coordinate values when the cutting tool comes into contact with the to-be-cut object subjected to turning work or a reference surface whose relative positional relationship with the rotation center of the to-be-cut object is known at least at two positions different from a rotation angle position of the cutting tool during the turning work.