Press Tool Fixing Element Controls Jaw Movement
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Solution Overview
Problem
Existing pressing tools for press fittings experience unpredictable relative movement between pressing jaws and fittings, leading to uneven deformation, burrs, and potential leaks, which complicate and cost expensive repairs.
Innovation Solution
A pressing tool with at least two movable pressing elements connected like a chain or tongs, equipped with fixing elements such as hemispherical attachments on the pressing jaws to reduce and define relative movement, ensuring controlled deformation and integration of company/product identification for visual inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pressing tools are used without fixing elements, then the pressing operation can be performed, but unpredictable relative movement occurs between pressing jaws and press fitting, leading to uneven deformation, burrs, and creases
Solution Approach 1:
The fixing element is pressed into the press fitting before the main deformation process begins. This preliminary action establishes a reference point that prevents subsequent unpredictable relative movements, ensuring uniform deformation throughout the pressing operation.
Solution Approach 2:
The fixing element acts as an intermediary between the pressing jaw and the press fitting. It mediates the interaction by providing a stable contact point that eliminates slippage and unpredictable movements, thereby ensuring consistent deformation and reliable connection tightness.
2Ease of manufacture
If pressing is performed without fixing elements, then the process is simpler, but relative movement causes burrs and creases that weaken the fitting and compromise sealing
Solution Approach 1:
The fixing element is installed before the pressing operation to establish a stable reference point. This preliminary action prevents the formation of burrs and creases during deformation, eliminating harmful effects without significantly complicating the manufacturing process.
3Device complexity
If no fixing element is used, then the pressing tool structure is simpler, but leak detection is delayed until after extended operation
Solution Approach 1:
The fixing element creates a visible mark or imprint on the press fitting surface. This visual indicator allows for immediate detection of proper pressing and potential leaks, eliminating the need for extended operation before leak detection.
4Manufacturing precision
If fixing elements are added to pressing jaws, then relative movement is reduced and deformation is controlled, but the tool structure becomes more complex
Solution Approach 1:
The pressing tool is segmented into functional components: the pressing jaw structure and the separate fixing element. This segmentation allows the fixing element to be a simple, add-on component rather than integrating complexity into the main jaw structure, thereby controlling relative movement with minimal increase in overall device complexity.
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
The tool minimizes relative movement and deformation damage, allowing for defined plastic deformation and easy verification of proper pressing through visual inspection, ensuring a tight and reliable connection.
Implementation Method 1
a fixing element is connected to at least one of the press jaws, with the aid of the fixing element reducing the relative movement between the corresponding press jaw and the press fitting
Implementation Method 2
the pressing elements are moved towards one another. The drive element can be connected to the two end pressing elements for closing the pressing tool
Implementation Method 3
a plastically deformable press sleeve surrounding the pipe to be connected is manually or automatically deformed radially
Data Source
Figure 1~2
Figure 3~4
AI summary
The pressing tool has two pressing elements (10,12) that are movable relative to each other and dies (16,18) that are supported by the pressing elements. A drive unit is provided for moving the dies. A fixing element (22) is provided at one of the dies for reducing the relative motion between the latter die and the press fitting in the area of fixing element. An independent claim is also included for a press fitting with an inner contour.