Servo Valve Chuck Control for Precise Intermediate Finger Positioning
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Solution Overview
Problem
Existing chuck devices face limitations in precise and easy adjustment of gripping member movement, requiring complex manual adjustments and lacking precise control via electrical signals.
Innovation Solution
A drive system with a servo valve controlled by a controller, incorporating a detection sensor to detect piston position and switch fluid supply, allowing precise control of piston displacement and finger opening/closing through adjustable valve opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment by rotating the end member is used, then the gripping position can be adjusted, but the adjustment work is complicated and high precision positioning is difficult to achieve
Solution Approach 1:
The patent replaces the manual mechanical adjustment system (rotating end member) with an automated control system comprising a controller, detection sensor, and switching valve. The controller electronically controls the switching valve to supply or exhaust fluid based on detected piston position, eliminating manual rotation operations and achieving precise positioning through automated feedback control.
Solution Approach 2:
The system implements self-service adjustment where the detection sensor automatically detects the piston axial position and the controller automatically controls the switching valve based on the detected position. This eliminates the need for operator intervention in the adjustment process, allowing the system to automatically achieve and maintain precise gripping positions.
2Productivity
If the end member is rotated to adjust gripping position, then the amount of stroke can be limited, but the adjustment process becomes complicated and time-consuming
Solution Approach 1:
The patent replaces complex manual mechanical adjustment with a simplified electronic control system. The controller electronically actuates the switching valve to control fluid supply/exhaust, which rapidly adjusts piston stroke without requiring physical rotation of the end member, thereby increasing adjustment speed while reducing operational complexity.
Solution Approach 2:
The system changes the control parameter from mechanical rotation angle to electrical control signals. By controlling the switching valve through electrical signals based on detected piston position, the system can rapidly adjust stroke parameters without the time-consuming mechanical rotation process, improving productivity.
3Measurement precision
If a simple switching valve is used, then the structure is simple, but precise control of piston displacement and finger opening/closing is not achieved
Solution Approach 1:
The patent implements feedback control where the detection sensor continuously detects the axial position of the piston and feeds this information to the controller. The controller then adjusts the switching valve based on the feedback signal to achieve the desired piston displacement and finger opening/closing precision, transforming a simple valve into a precisely controlled actuator.
Solution Approach 2:
The patent replaces direct mechanical positioning with automated fluid control. The switching valve, controlled by electrical signals from the controller based on sensor feedback, precisely regulates fluid supply and exhaust to achieve accurate piston displacement and finger positioning, eliminating the need for complex mechanical positioning mechanisms.
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 fingers to be stopped at any position with high precision and ease, overcoming the complexity of manual adjustments and improving positioning accuracy.
Implementation Method 1
a piston (20) displaceable in an axial direction under an effect of supply of fluid
Implementation Method 2
a detection sensor (32) configured to detect an axial position of the piston
Implementation Method 3
a switching valve (14) configured to switch a state of supply of the fluid to the chuck device... the degree of valve opening is controllable based on a control signal
Data Source
AI summary
A control method of controlling a chuck device in a drive system for driving the chuck device, comprising opening or closing fingers by opening a switching valve at a first degree of valve opening to supply the fluid to a first cylinder chamber of the chuck device and to discharge the fluid from a second cylinder chamber of the chuck device so that a piston moves in one direction, and stopping the fingers in an intermediate position between a fully open position and a fully closed position by opening the switching valve at a second degree of valve opening to stop supplying the fluid to the first cylinder chamber and to stop discharging the fluid from the second cylinder chamber when the axial position of the piston reaches a target position set in advance while the fingers are being opened or closed.