Ceramic Nozzle Cap with Integrated Electrode for Welding Tools
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Solution Overview
Problem
The existing welding or cutting tools face challenges in efficiently producing a nozzle cap with a metal electrode and ceramic insulating ring, as the metal electrode is difficult to integrate into the ceramic material, making the production process complex and costly.
Innovation Solution
The use of a two-component ceramic injection-molding method to connect electrically conductive and non-conductive ceramic materials, where the electrode and insulating element are produced in one piece from titanium nitride and aluminum oxide ceramics, respectively, and integrated with a contact element for easy connection to evaluation electronics, enhancing the tool's design and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal electrode is integrated into a ceramic insulating ring, then the nozzle cap can function as a welding or cutting tool with distance measurement capability, but the production process becomes complicated and expensive
Solution Approach 1:
The patent applies composite materials by creating a ceramic electrode made of conductive ceramic material (such as titanium nitride or barium titanate) that combines both the insulating properties of ceramic and the electrical conductivity needed for capacitance-based distance measurement. This eliminates the need to integrate separate metal electrode and ceramic insulator components, simplifying manufacturing while maintaining functionality.
Solution Approach 2:
The patent changes the electrical conductivity parameter of the ceramic material by using conductive ceramic compositions (e.g., titanium nitride with at least 18 vol.-% content, or barium titanate with specific dielectric constants). This allows the ceramic material itself to serve as the electrode, eliminating complex metal-ceramic integration processes while enabling capacitance measurement for distance determination.
2Ease of operation
If a metal electrode is fitted into ceramic insulating material, then the nozzle cap can be constructed with functional electrode and insulator, but the production cost increases
Solution Approach 1:
The patent uses composite ceramic materials that combine insulating ceramic base material with conductive additives (titanium nitride, barium titanate) to create a single-material solution that provides both insulation and electrode functionality. This eliminates the need for separate metal electrode and ceramic insulator components, reducing manufacturing steps and costs while maintaining full functional capability.
Solution Approach 2:
The patent merges the functions of the electrode and insulator into a single ceramic component. The conductive ceramic material simultaneously provides electrical insulation (relative to the workpiece) and electrode functionality for capacitance measurement, eliminating the need for separate components and their complex assembly processes.
3Ease of operation
If a contact element is exposed for connection with evaluation electronics, then electrical connection can be established, but the contact element is vulnerable to slag particles and environmental influences
Solution Approach 1:
The patent nests the contact element within the ceramic structure of the nozzle cap. The contact element is positioned inside the ceramic housing, which provides physical protection from slag particles and environmental influences. The ceramic material acts as a protective enclosure that allows electrical connection while shielding the vulnerable contact elements from harmful external factors.
Solution Approach 2:
The patent introduces the ceramic material as an intermediary protective barrier between the contact element and the external environment (slag particles, moisture, etc.). The ceramic provides electrical insulation and physical protection while allowing the contact element to function, mediating between the need for electrical connection and the need for protection from harmful factors.
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 approach simplifies the production process, reduces costs, and maintains accurate distance measurement capabilities between the tool tip and work piece, while protecting the contact element from slag particles and environmental influences.
Implementation Method 1
The insulating ring insulates the metal cap from the other components of the cutting torch, so that the metal cap forms a measurable capacitance with an electrically conductive work piece to be worked on, which capacitance is dependent on the reciprocal distance
Implementation Method 2
The one-piece semi-finished product obtained in this manner is then removed from the injection mold and fired in a firing process to form the finished nozzle cap
Data Source
AI summary
A welding or cutting tool for welding or cutting electrically conductive workpieces includes a nozzle arranged on a tool tip for discharging a welding or cutting beam and a nozzle cap which at least partly surrounds the nozzle, is open towards the tool tip, and has an electrode that forms a capacitance with the respective workpiece and an insulating element that electrically insulates the electrode from the other components of the tool. The electrode consists of a first electrically conductive ceramic material and is formed integrally with the insulating element, which consists of a second electrically insulating ceramic material.