Adjustable Wire Feed for Thermal Coating Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thermal coating devices face challenges in achieving precise wire positioning relative to the nozzle opening, leading to inclusions and spatter due to incomplete melting of the wire, which requires frequent adjustments and can result in defects in the coating process.
Innovation Solution
The device features an adjustable wire feed system with static and dynamic adjustment means, allowing for precise alignment of the wire end relative to the plasma gas jet, with adjustment paths as small as 0.08 mm, and high-frequency vibration to ensure optimal melting and prevent spatter formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wire is positioned precisely relative to the nozzle opening to achieve complete and uniform melting, then coating quality improves, but device complexity increases due to the need for precise adjustment mechanisms
Solution Approach 1:
The wire feed device incorporates an adjustable mechanism that allows dynamic positioning of the wire end relative to the nozzle opening. The adjustment path enables the wire to be moved laterally by a specific distance (advantageously no greater than 0.08 mm) to achieve precise alignment, transforming a static positioning problem into a dynamically adjustable system that can adapt to different operating conditions while maintaining manufacturing precision.
2Reliability
If the wire feed device includes adjustment means for precise wire positioning, then coating reliability improves by preventing inclusions and spatter, but device complexity increases
Solution Approach 1:
The adjustment means are designed to be set with the device switched off, allowing preliminary positioning of the wire in front of the nozzle opening before operation begins. This preliminary action ensures that the wire is correctly positioned before the coating process starts, preventing inclusions and spatter from the outset and thereby improving coating reliability without requiring complex active control systems during operation.
Solution Approach 2:
The wire feed device is designed to be easily adjustable by the operator, allowing self-positioning of the wire end relative to the nozzle opening. The simple adjustment mechanism enables users to achieve precise alignment (adjustment path no greater than 0.08 mm) without requiring complex automated systems, thereby improving reliability through user-friendly design rather than through sophisticated control mechanisms.
3Ease of operation
If a larger adjustment path is provided for wire positioning, then ease of operation improves, but manufacturing precision deteriorates due to difficulty in determining optimal position
Solution Approach 1:
The adjustment mechanism provides a controlled adjustment path that allows the wire end to be moved laterally by a specific distance. The adjustment path is designed to be no greater than 0.08 mm, which is sufficient to achieve precise positioning while remaining small enough to allow accurate determination of the optimal wire position. This balanced design enables easy operation without sacrificing manufacturing precision.
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
This solution enables reliable and defect-free thermal coating by ensuring precise wire positioning and uniform melting, reducing the occurrence of unmelted or partially melted particles and improving the overall coating quality.
Implementation Method 1
An arc forms between the two electrodes through the nozzle opening. The plasma gas flowing through the nozzle opening is also formed by this arc.
Implementation Method 2
The plasma gas flowing through the nozzle opening is also formed by this arc. The plasma gas jet emerging from the nozzle opening hits the end of the wire and there, together with the arc, causes the wire to melt
Implementation Method 3
the frequency can also be higher than the speed. However, the frequency can also be such that a slight oscillation of the wire end in the higher frequency range, e.g. B. between 1 kHz and 10 kHz, to bring about a safe melting of the wire end by the wire end is deflected evenly within certain positioning limits
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a device for thermally coating a surface, comprising a wire supplying element (4) for supplying a wire (5) acting as a first electrode, a plasma gas source for producing a plasma gas stream, a nozzle body (2) comprising a nozzle opening (3) through which the plasma gas stream is guided as a plasma gas jet to a wire end (8), and a second electrode (7) arranged in the plasma gas stream before said stream enters the nozzle opening (3). The invention is characterised in that the wire supplying device (4) can be adjusted, whereby the wire end (8) arranged in front of the nozzle opening (3) can be moved along a defined adjustment path. In this way, assembly tolerances in the device can be easily compensated and a high and constant quality of the coating is obtained.