Sensor-Guided Pipe Pressing Force Control for Fitting Integrity
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Solution Overview
Problem
Conventional pressing tools apply a uniform maximum force to join fittings with pipes, regardless of the material, which can lead to suboptimal and material-unfriendly joining, affecting the quality and durability of the joint.
Innovation Solution
A pressing tool equipped with sensor-identified workpiece recognition and a motor control system that adjusts force based on the workpiece's material and characteristics, using a database of control parameters for optimal deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If maximum pressing force is always applied during pressing, then the pressing tool can handle all types of fittings, but the fitting material may be damaged or deformed suboptimally
Solution Approach 1:
The pressing tool dynamically adjusts the pressing force based on real-time sensor feedback about the fitting material properties. The control system modifies the motor output during the pressing operation to match the specific material characteristics detected, transitioning from a static fixed-force system to a dynamic adaptive one.
Solution Approach 2:
A sensor system continuously monitors the pressing process and provides feedback to the control unit. The sensor detects parameters such as material hardness, deformation resistance, or pressing force requirements, and the control system uses this information to adjust the pressing force in real-time, creating a closed-loop control system.
2Strength
If maximum pressing force is always applied, then the pressing tool ensures sufficient deformation, but the durability of the pressed fitting decreases
Solution Approach 1:
The pressing tool changes the pressing force parameter based on the detected fitting material characteristics. Instead of using a fixed maximum force, the system adjusts the force parameter to match the material's deformation requirements, ensuring sufficient deformation while avoiding excessive force that would reduce durability.
Solution Approach 2:
The sensor system performs preliminary detection of the fitting material properties before the pressing operation begins. This preliminary action allows the control system to pre-calculate and set the appropriate pressing force parameters, preventing both insufficient and excessive deformation from the outset.
3Device complexity
If conventional pressing tools use fixed pressing force, then the device complexity is low, but the joining quality varies with different materials
Solution Approach 1:
The pressing tool replaces the purely mechanical fixed-force system with an integrated sensorimetric and electronic control system. Sensors detect material properties, and an electronic control unit processes this information to dynamically adjust the motor-driven pressing mechanism, substituting mechanical simplicity with intelligent control.
Solution Approach 2:
The pressing tool becomes a multi-functional device that can handle various fitting materials and types by integrating sensing capabilities and adaptive control. The same basic pressing mechanism serves multiple material types through software-based parameter adjustment, eliminating the need for multiple specialized tools.
Data Source
AI summary
A pressing tool, particularly a pipe pressing tool, for plastically deforming a tubular workpiece, particularly a fitting, is described. The pressing tool includes pressing jaws and a motor which is adapted to drive the pressing jaws in order to apply a force to the workpiece. Further, a method of operating such a pressing tool, and pressing jaws as well as a tubular workpiece are described.