Press Tool Segmented Guide for Fitting Alignment
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Solution Overview
Problem
Existing pressing tools for fittings with a pressing lug lack accurate positioning, leading to unreliable pressing due to insufficient alignment between the tool and the fitting, resulting in faulty pressings.
Innovation Solution
A pressing tool with two movable tool halves, each equipped with a pressing part and a guiding part, where the guiding parts can move separately to ensure precise positioning before the final phase of the closing movement, creating a form fit with the fitting to ensure correct alignment and prevent residual play, allowing the pressing parts to move further and securely engage the pressing lug.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the pressing tool uses a simple wedge-shaped tip design, then the device complexity is reduced, but the positioning accuracy deteriorates leading to faulty pressings
Solution Approach 1:
The tool tip is segmented into two distinct functional parts: a guiding part with a first wedge-shaped surface for positioning, and a pressing part with a second wedge-shaped surface for deformation. This segmentation allows each part to be optimized for its specific function, achieving both positioning accuracy and pressing effectiveness without excessive complexity.
Solution Approach 2:
Different regions of the tool tip are given different geometric properties: the guiding part has a first wedge-shaped surface configuration optimized for alignment, while the pressing part has a second wedge-shaped surface configuration optimized for material deformation. This local differentiation ensures that positioning and pressing functions are performed with appropriate local characteristics.
2Productivity
If the pressing tool applies force early in the closing movement, then the pressing action is initiated sooner, but the positioning accuracy deteriorates due to lack of form fit
Solution Approach 1:
The guiding part with the first wedge-shaped surface performs a preliminary action by establishing form fit and correct alignment between the pressing tool and the pressing lug before the pressing part engages. This preliminary positioning action ensures that when the pressing force is applied, the tool is already correctly positioned, eliminating the need to trade off speed for accuracy.
Solution Approach 2:
The tool design allows for a dynamic sequence of operations during the closing movement: first the guiding part engages to establish positioning, then the pressing part follows to apply force. This dynamic sequencing enables the tool to adapt its function at different stages of the closing movement, achieving both speed and accuracy.
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 solution ensures accurate and reliable pressing by providing a designated guiding function that enhances positioning accuracy, reducing the likelihood of faulty pressings and improving the overall reliability of the pressing process.
Implementation Method 1
two closable towards one another with one movement and away from one another with one movement openable tool halves (14, 14'), each with a pressing part (15, 15') serving to press the pressing tab (2) during the closing movement
Implementation Method 2
a fitting part is plastically deformed with a special tool; it is usually a sheet metal part
Implementation Method 3
a geometric guidance of the pressing tool during the closing movement, in order to support the operator with regard to correct positioning of the pressing tool relative to the fitting
Data Source
Figure 1~3b
Figure 4a~7b
Figure 8a~8b
AI summary
The invention relates to a press tool adapted to a press fitting with a cylindrical part and a projecting press tab, in which two tool halves each have a press part and a guide part and the press part can move beyond the guide part in a final phase of a closing movement of the press tool.