Fluid Actuator Bleed Port for Rebound Striking
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Solution Overview
Problem
Impact cylinders face the issue of rebound striking due to residual pressure in the rear cylinder chamber, which is not efficiently vented, leading to multiple impacts on the work piece and increased complexity and expense in control systems.
Innovation Solution
A fluid operated actuator with a bleed port and adjustable relief valve is introduced, allowing pressure to be communicated between chambers to rapidly compensate for the force acting on the main piston, preventing rebound striking by bleeding pressure into a secondary chamber and using a biasing member to retract the striking pin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If exhaust valves are used to vent the rear cylinder chamber, then the striking pin can retract, but the control system becomes complex and expensive
Solution Approach 1:
The invention extracts the harmful residual pressure from the rear cylinder chamber through a bleed port, separating the pressure venting function from the main control system. This allows the striking pin to retract without requiring complex exhaust valves or control systems, as the pressure is passively bled off through a simple port in the piston.
Solution Approach 2:
The bleed port acts as an intermediary element that provides a controlled path for pressure equalization between the front and rear chambers. Instead of directly venting to atmosphere through complex valves, the bleed port mediates the pressure release process, allowing gradual pressure equalization that enables smooth striking pin retraction.
2Ease of operation
If complex exhaust valves and large ventilators are used to vent pressure, then the striking pin can retract, but the expense increases
Solution Approach 1:
The invention replaces expensive, complex exhaust valves and large ventilators with a simple bleed port that can be easily manufactured into the piston. This simple pressure equalization mechanism achieves the same functional result at a fraction of the cost, eliminating the need for expensive control components.
3Force
If pressure is rapidly pressurized to actuate the piston with sufficient force, then the piston can strike the work piece, but rebound striking occurs due to residual pressure
Solution Approach 1:
The invention converts the harmful residual pressure in the rear chamber into a beneficial force by allowing it to equalize through the bleed port. The pressure differential that initially drives the piston forward is later used to push the piston back, assisting the return stroke and preventing rebound striking without requiring additional energy input.
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
This solution effectively reduces rebound striking by immediately compensating for pressure in the first chamber, allowing the piston and striking pin to retract quickly, thus preventing multiple impacts and simplifying the control system while reducing costs.
Implementation Method 1
a bleed port providing fluid communication between the first chamber and the second chamber
Implementation Method 2
a biasing member coupling the striking pin to the piston
Data Source
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AI summary
A fluid operated actuator (100) is provided. The fluid operated actuator (100) includes a cylinder body (101) and a piston (102) movable within the cylinder body (101). The piston (102) defines a first chamber (105) and a second chamber (106). The fluid operated actuator (100) can include a fluid inlet (107) formed in the first chamber (105). A bleed port (110) can be formed to provide fluid communication between the first chamber (105) and the second chamber (106).