Pneumatic Time-Delay Control for Stable Rotational Clamping
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Solution Overview
Problem
Conventional pneumatic tools lack a time-delay valve module, which limits their ability to control and maintain a consistent rotational movement and clamping force.
Innovation Solution
The pneumatic control device incorporates a time-delay unit with a delay switch, flow-limiting valve, pressure accumulator, and control valve, allowing for controlled fluid communication with a pneumatic supplier, enabling precise rotational movements and maintaining clamping force for a predetermined period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pneumatic tools are used without a time-delay valve module, then the device complexity is low, but the ability to control and maintain consistent rotational movement and clamping force is poor
Solution Approach 1:
The patent introduces a time-delay valve module as an intermediary component between the pneumatic supplier and the rotation control units. This module includes a delay switch, flow-limiting valve, pressure accumulator, and control valve that work together to provide timed control of pneumatic fluid, enabling consistent rotational movement and clamping force without requiring complex control systems.
Solution Approach 2:
The time-delay valve module performs preliminary action by pre-controlling the pneumatic fluid flow before it reaches the rotation control units. The delay switch and flow-limiting valve prepare the fluid in advance, ensuring that the subsequent rotational movements are consistent and controlled, thereby improving reliability without adding excessive complexity.
2Manufacturing precision
If a time-delay valve module is added to control rotational movement, then the operational precision is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes pneumatic principles throughout the time-delay valve module, employing compressed air or gas as the working medium. The flow-limiting valve and pressure accumulator use pneumatic mechanisms to control fluid flow and pressure, providing precise rotational control through pneumatic rather than mechanical means, which reduces mechanical complexity while improving precision.
Solution Approach 2:
The time-delay valve module controls rotational precision by changing pneumatic parameters such as flow rate (via the flow-limiting valve) and pressure (via the pressure accumulator). By adjusting these parameters, the system achieves precise control over the rotation speed and clamping force without requiring complex mechanical positioning mechanisms.
3Stability of the object's composition
If the time-delay unit maintains fluid communication for a predetermined period, then the clamping force consistency is improved, but the response time increases
Solution Approach 1:
The time-delay valve module implements periodic action through the delay switch, which controls the pneumatic fluid flow in timed intervals. The switch opens and closes at predetermined times, creating a rhythmic flow pattern that maintains stable clamping force over the desired period while allowing for rapid response when the timing cycle resets.
Solution Approach 2:
The system uses dynamic control through the delay switch and flow-limiting valve, which can rapidly adjust the pneumatic fluid flow rate and pressure in response to timing signals. This dynamic adjustment capability allows the system to maintain stable clamping force during the predetermined period while minimizing overall response time through quick transitions between states.
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 precise control of rotational movements and consistent clamping force, improving the operational efficiency and reliability of pneumatic tools in applications like vises and chucks.
Implementation Method 1
a pressure accumulator that is connected downstream of the flow-limiting valve
Implementation Method 2
a flow-limiting valve that is connected downstream of the delay switch
Implementation Method 3
The cylinder unit is installed in the axial hole of the base seat unit, and is able to drive a first rotational movement about the axial line upon receipt of fluid from the first guide channel
Data Source
AI summary
A pneumatic control device includes a base seat unit, a cylinder unit and a time-delay unit. The cylinder unit is mounted the base seat unit, and is able to drive rotational movement. The time-delay unit is mounted to the base seat unit, and includes sequentially interconnected delay switch, flow-limiting valve, pressure accumulator and a control valve. The delay switch is operable to move between an action position whereat the cylinder unit drives the rotational movement, and a non-action position. When the delay switch is moved to the non-action position, the cylinder unit keeps driving the rotational movement for a period of time and then stops.