Nanocrystalline Chrome Plated Ring for Fine Spinning
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Solution Overview
Problem
Fine spinning machine rings experience significant abrasion and reduced lifetime due to inadequate abrasion resistance, limiting high-speed and long-duration operation in dry spinning processes.
Innovation Solution
A ring for a fine spinning machine with a sliding surface covered by a specific chrome plating, characterized by a hydrogen-to-chromium emission intensity ratio of 0.1 or more and a half-value width of the (222) plane peak of 3° or more, enhancing abrasion resistance and suppressing traveler abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional chrome plating is applied to the ring sliding surface, then the ring provides basic abrasion resistance, but the abrasion resistance is insufficient for high-speed long-duration operation
Solution Approach 1:
The patent applies parameter changes by controlling the plating conditions to achieve specific hydrogen content (0.03-1.0 mass%) and crystallite size (3-20 nm) in the chrome plating layer. These parameter adjustments transform the chrome plating from a conventional protective coating to a nanocrystalline structure with superior abrasion resistance, enabling the ring to withstand high-speed long-duration operation without excessive wear
Solution Approach 2:
The patent creates a composite structure by incorporating hydrogen into the chrome plating matrix, forming a hydrogen-containing nanocrystalline chrome plating layer. This composite material combines the hardness and wear resistance of chrome with the structural benefits of nanocrystalline morphology and hydrogen interstitials, achieving enhanced abrasion resistance that extends ring lifetime
2Productivity
If the ring operates at high speed for long time to improve productivity, then productivity increases, but the ring and traveler experience excessive abrasion and reduced lifetime
Solution Approach 1:
The patent enables high-speed operation by transforming the chrome plating into a nanocrystalline structure with controlled hydrogen content. The specific parameters (hydrogen: 0.03-1.0 mass%, crystallite size: 3-20 nm) create a plating layer that maintains exceptional abrasion resistance even under the increased mechanical stresses and sliding velocities of high-speed spinning operations
Solution Approach 2:
The patent effectively transforms the chrome plating from a short-living conventional coating into a durable nanocrystalline structure that can withstand extended high-speed operation. The nanocrystalline morphology with 3-20 nm crystallites provides a structure that resists abrasion mechanisms that would quickly degrade conventional chrome plating, extending the functional lifetime of the ring at high speeds
3Reliability
If chrome plating is applied to improve abrasion resistance, then sliding resistance is reduced, but the manufacturing process complexity increases
Solution Approach 1:
The patent achieves the complex nanocrystalline hydrogen-containing structure through controlled parameter changes during conventional electroplating or chemical vapor deposition. By adjusting plating bath composition, temperature, current density, or gas phase parameters, the process produces the desired 3-20 nm crystallite size and 0.03-1.0 mass% hydrogen content, transforming a simple coating process into a precision nanomaterial synthesis process
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 chrome plating significantly improves the abrasion resistance of the ring and traveler, allowing for extended lifetime and increased productivity by reducing sliding resistance and abrasion, enabling high-speed and long-duration operation in dry spinning processes.
Implementation Method 1
a fiber thin film having friction reducing effect on the sliding surface enters the micro cracks and becomes difficult to peel off, so that the sliding resistance of the traveler is stably reduced
Implementation Method 2
a ratio of emission intensity of hydrogen atoms to emission intensity of chromium atoms determined by glow discharge optical emission spectrometry
Data Source
Figure 1A~2
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AI summary
A ring (11) for a fine spinning machine is used in the fine spinning machine for winding a yarn through a traveler (12) sliding on a sliding surface of the ring (11) in a dry state. The sliding surface of the ring (11) is covered by chrome plating (13). In the chrome plating (13), a ratio of emission intensity of hydrogen atoms (H) to emission intensity of chromium atoms (Cr) determined by glow discharge optical emission spectrometry (GD-OES) is 0.1 or more.