Wire Inlet Nozzle Sealing for Welding Gas Tightness
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Solution Overview
Problem
Existing wire inlet nozzles fail to prevent the escape of protective gas in the opposite direction of the welding wire, leading to reduced welding seam quality and increased gas consumption.
Innovation Solution
A wire inlet nozzle design featuring a main body with a separating plane for independent fastening of the wire core and sealing element, where the sealing element is arranged upstream of the wire core, and a cavity with a compensating element to maintain tightness and reduce vibrations, ensuring the protective gas flows only towards the welding torch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing element is integrated into the wire inlet nozzle, then the tightness is improved, but the device complexity increases
Solution Approach 1:
The wire inlet nozzle is divided into a first part (main body) and a second part (detachable connection), with the sealing element integrated into the first part. This segmentation allows the sealing element to be independently positioned and fastened upstream of the wire core, improving tightness while keeping the overall structure manageable through modular design.
2Object-generated harmful factors
If the sealing element is arranged upstream of the wire core, then the protective gas escape is prevented, but the manufacturing complexity increases
Solution Approach 1:
The sealing element is positioned upstream of the wire core in the flow direction of the protective gas, creating a sealed inlet for the welding wire before the gas reaches the wire core. This preliminary sealing action prevents protective gas from escaping in the wrong direction, ensuring gas flows exclusively towards the welding torch.
3Stability of the object's composition
If the cavity diameter is larger than the sealing element diameter, then the vibration compensation is improved, but the tightness may be compromised
Solution Approach 1:
The cavity is designed with a diameter larger than the sealing element, creating free space between them. This local dimensional difference allows the sealing element to move freely within the cavity, compensating for vibrations of the welding wire without compromising the overall tightness of the connection between the first and second parts.
4Duration of action of stationary object
If the sealing element is made movable in the cavity, then the lifetime is extended, but the device complexity increases
Solution Approach 1:
The sealing element is designed to move freely within the cavity rather than being rigidly fixed. This dynamic arrangement allows the sealing element to adapt to vibrations and positional changes of the welding wire, extending its service life by reducing wear and maintaining effective sealing over time.
Data Source
AI summary
The invention relates to a wire inlet nozzle (27) for fastening in a coupling (29) of a hose package (21), comprising a wire inlet element (32) and a fastening means (31) for a wire core (26) for guiding a welding wire (9), wherein a main body is formed between the wire inlet element (32) and the fastening means (31) and a cavity (56) is formed in the wire inlet element (32), in which cavity at least one sealing element (57) having an axial opening (59) for guiding the welding wire (9) is arranged. In order to prevent an escape of the protective gas in the wire inlet nozzle (27) in a direction opposite to the main conveying direction of the welding wire (9), the main body forms a first part (54) of the wire inlet element (32), and a second part (55) of the wire inlet element (32) can be detachably connected to the first part (54), and the main body is designed as a separating plane for independently fastening the wire core (26) and the sealing element (57).