Single-Line Pneumatic Actuation for Bidirectional Machine Tool Control
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Solution Overview
Problem
Pneumatic actuation systems for machine tools require two separate compressed air lines for piston extraction and withdrawal, leading to increased costs and system dimensions, which is inefficient and costly.
Innovation Solution
A pneumatic actuation system utilizing a single compressed air supply line with a pressure adjustment and control unit, comprising a control valve and adjustment valve connected via an air control line, allowing the piston to be actuated through a single air supply line by switching and adjusting pressure, thereby eliminating the need for dual pneumatic circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate compressed air lines are used for piston extraction and withdrawal, then the piston can be actuated in both directions, but the system dimensions and costs increase
Solution Approach 1:
The patent combines two separate pneumatic circuits into a single circuit by using a reversible 5/2 way valve that directs compressed air to either the first or second chamber of the piston-cylinder assembly. This merging eliminates the need for two separate air lines while maintaining full bidirectional piston actuation capability, directly resolving the technical contradiction between reliability and device complexity.
Solution Approach 2:
The single compressed air line is equipped with a multi-functional 5/2 way valve that performs multiple functions: it acts as a direction control valve for bidirectional piston movement, a pressure regulator, and a flow distributor to either chamber. This universal component replaces what would traditionally require two separate dedicated air lines, reducing system complexity while maintaining full actuation capability.
2Ease of operation
If two separate compressed air lines are used for piston extraction and withdrawal, then complete pneumatic control is achieved, but the overall system cost increases
Solution Approach 1:
The patent merges the functionality of two separate pneumatic control systems into a single integrated circuit using a 5/2 way valve. This consolidation reduces the number of required components (fewer air lines, fewer valves, fewer connections) while maintaining complete pneumatic control for both piston extraction and withdrawal, thereby reducing manufacturing costs without compromising operational completeness.
Solution Approach 2:
The 5/2 way valve serves as a universal control component that handles all pneumatic control requirements for the piston-cylinder assembly through a single air supply line. It provides complete operational control for both directions of piston movement, eliminating the need for two separate control systems and reducing overall system cost while maintaining ease of operation.
3Device complexity
If a single compressed air supply line is used, then system dimensions and costs are reduced, but controlling bidirectional piston movement becomes challenging
Solution Approach 1:
The patent introduces a 5/2 way valve as an intermediary device between the single compressed air supply line and the piston-cylinder assembly. This intermediary valve mediates the air flow distribution, directing compressed air to either the first chamber (for piston withdrawal) or the second chamber (for piston extraction) based on control signals, thereby enabling bidirectional actuation through a single air line without compromising control versatility.
Solution Approach 2:
The 5/2 way valve provides dynamic control of air flow direction, allowing the system to switch between two operational modes (piston withdrawal and piston extraction) using a single air supply line. The valve's ability to dynamically redirect air flow to different chambers enables the simplified single-line system to maintain full bidirectional actuation capability, resolving the contradiction between simplicity and versatility.
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 reduces the overall costs and dimensions of the actuation system while maintaining operational efficiency by enabling the actuation of machining aggregates with a single air supply line, enhancing structural and economic advantages.
Implementation Method 1
when said first chamber is supplied with compressed air, said piston is actuated
Implementation Method 2
an adjustment valve unit for adjusting the pressure of the compressed air coming from said air supply line
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present invention relates to a pneumatic actuation system (1) for machining aggregates, in particular equipped with at least one machine tool, said pneumatic actuation system (1) being connectable to an air supply line (2), comprising at least one piston-cylinder assembly (3, 3a), having a cylinder (31, 31a) and a piston (32, 32a), wherein said cylinder (31, 31a) has a first chamber (33, 33a), such that, when said first chamber (33, 33a) is supplied with compressed air, said piston (32, 32a) is actuated so as to allow the actuation of the respective machining aggregate, and a pressure adjustment and control unit (U), which can be connected to said air supply line (2), characterised in that said adjustment and control unit (U) is configured for switching and sending upon command the compressed air coming from said air supply line (2) on said first chamber (33, 33a) of said cylinder (31, 31a) of said at least one piston-cylinder assembly (3, 3a). The present invention also relates to a machine tool (7).