Pressing Jaw Geometry for Correct Press Ring Matching

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Solution Overview

Problem

Existing pressing tools and press rings often result in incomplete pressing or damage due to geometric mismatches, leading to insufficient or excessive force application during the pressing process of press fittings, particularly in cold forming applications.

Innovation Solution

The design of a pressing tool with adjustable connecting elements that match specific press rings by ensuring the minimum distance in the open position is greater than the maximum distance of the press ring's receiving elements, preventing incorrect connections and ensuring optimal force transmission, while the minimum distance in the closed position corresponds to the press ring's elements for complete closure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a pressing tool that is geometrically too large is used, then the pressing tool can accommodate larger press rings, but this leads to incomplete closing of the press ring, so that insufficient pressing forces are applied to the press fitting

Engineering Contradiction:

Improvecompatibility with different press ring sizesVSAvoidpressing precision

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The pressing tool incorporates adjustable closing distance parameters that can be modified to match different press ring geometries. The pressing device allows adjustment of the closing distance between pressing jaws, enabling the same tool to work with multiple press ring sizes while maintaining complete closure and sufficient pressing force for each specific application.

Inventive Principle:

Principle #35Parameter changes

2Force

If a pressing tool that is geometrically too small is used, then the pressing tool provides higher closing force capability, but this leads to pressing force beyond the closing point of the press ring, which can damage or even destroy the press ring and press fitting

Engineering Contradiction:

Improveclosing forceVSAvoiddamage to press ring and press fitting

Core Design Contradiction:

ForceVSObject-affected harmful factors

Solution Approach 1:

The pressing device incorporates feedback mechanisms that monitor the closing process and detect when the press ring has reached complete closure. The system uses sensors or force feedback to recognize the closure point and automatically adjusts or stops the pressing force, preventing over-pressing and damage to the press ring and press fitting while still enabling high closing force capability when needed.

Inventive Principle:

Principle #23Feedback

3Object-affected harmful factors

If a pressing tool is used which provides too low a closing force, then the pressing tool can prevent damage to the press ring, but incomplete pressing may occur because the pressing tool switches off at its maximum pressing force before the press ring is completely closed

Engineering Contradiction:

Improvedamage preventionVSAvoidpressing completeness

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The pressing device uses feedback control to distinguish between the force needed to close the press ring and the force that would cause damage. Sensors monitor the closing process in real-time, detecting the transition from incomplete to complete closure, and adjust the pressing force accordingly to achieve full closure without exceeding damage thresholds.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The pressing tool employs dynamic force adjustment during the closing process rather than applying a static force level. The pressing force is continuously adapted based on the stage of closure, starting with higher force to overcome initial resistance and then modulating to complete closure while preventing over-pressing, enabling both complete pressing and damage prevention.

Inventive Principle:

Principle #15Dynamics

4Force

If a pressing tool is used with too high a closing force, then the press ring may be over-loaded, which can damage or even destroy the press ring and press fitting

Engineering Contradiction:

Improveclosing forceVSAvoidintegrity of press ring and press fitting

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20240300002A1Pressing Tool

Publication Date: 2024.09.12 NOVOPRESS GMBH PRESSEN UND PRESSWERKZEUGE & CO KG

AI summary

The pressing tool includes two pressing jaws which are movable towards one another from an open position into a closed position for pressing, said pressing jaws including a connecting element for connection to respective receiving elements of the pressing ring, so that the press ring is movable from an open position into a closed position by the movement of the pressing jaws for pressing the press fitting. The minimum spacing of the connecting elements in the open position is greater than the maximum spacing of the receiving elements of the press ring in the open position, and the minimum spacing of the connecting elements in the closed position corresponds to a minimum spacing of the receiving elements of the press ring in the closed position. Furthermore, the minimum spacing of the connecting elements in the open position is smaller than the maximum spacing of the receiving elements of a second press ring in the open position, so that connection to the second press ring is prevented.