Tool Change Rotary Position Determining Device for CNC Turret
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Solution Overview
Problem
Existing tool change rotary position determining devices cannot accurately detect positional deviations, especially when tools are unevenly distributed on the turret, leading to potential misalignment between the spindle and the grip.
Innovation Solution
A device and method that acquire load torque and rotary position data from the turning motor, allowing for clockwise and counterclockwise turret rotation to determine the tool change rotary position by calculating the midpoint between specific rotary positions where the load torque exceeds a predetermined value, thereby correcting for uneven tool distribution and manufacturing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the current value of the magazine motor is used to determine positional deviation, then the adjustment can be performed, but accurate adjustment is impossible when tools are unevenly distributed on the turret
Solution Approach 1:
The patent changes the detection parameter from current value to load torque. Load torque is acquired during clockwise and counterclockwise rotation of the turret, and the tool change rotary position is determined based on the relationship between load torque and rotary position. This parameter change eliminates the influence of uneven tool distribution on measurement accuracy.
Solution Approach 2:
Instead of using the current value during normal operation to detect positional deviation, the patent inverts the approach by rotating the turret in both directions and detecting load torque changes. The tool change position is determined by finding the rotary position where load torque exceeds a predetermined value, reversing the traditional detection methodology to achieve higher accuracy.
2Measurement precision
If distinct positional deviation is required for detection, then the detection can be performed, but small or subtle deviations cannot be detected
Solution Approach 1:
The patent changes from detecting current value to detecting load torque during bidirectional rotation. By acquiring load torque values at multiple rotary positions (clockwise and counterclockwise) and comparing them, the system can detect even small positional deviations that would be imperceptible with current value measurement alone.
Solution Approach 2:
The patent performs excessive action by rotating the turret in both clockwise and counterclockwise directions and acquiring load torque at multiple positions, rather than relying on a single measurement. This redundant measurement approach enables detection of subtle deviations that would be missed with minimal measurement.
3Reliability
If tools are distributed unevenly on the turret, then the current value fluctuates with rotation angle, but the invention maintains accurate tool change position determination
Solution Approach 1:
The patent changes the measurement parameter from current value to load torque, which remains relatively stable despite uneven tool distribution. Load torque is measured during controlled clockwise and counterclockwise rotation, and the tool change position is determined based on the relationship between load torque and rotary position, eliminating the fluctuation problem.
Solution Approach 2:
The patent implements feedback by acquiring load torque values during rotation and using this information to determine the tool change rotary position. The system continuously monitors load torque and rotary position, and adjusts the determined position based on the actual measured values, compensating for any variations caused by uneven tool distribution.
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 and easy determination of the tool change rotary position, preventing misalignment between the spindle and grip even with uneven tool placement, ensuring precise tool attachment and removal.
Implementation Method 1
a turning motor configured to turn the turret
Data Source
AI summary
A tool change rotary position determining device includes: a turret rotation controller configured to control a turning motor so as to turn a turret clockwise and counterclockwise in a state where a tool holder of a tool gripped by a specific grip on the turret is inserted in an attachment hole of a spindle; and a tool change rotary position determining unit configured to determine a tool change rotary position of the turret when the tool is transferred between the specific grip and the spindle to be attached to and removed from the spindle, based on the load torques and the rotary positions of the turning motor when the turret is turned clockwise and counterclockwise.