Friction Roller Dynamics for Winding Noise Suppression
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Solution Overview
Problem
Existing winding devices experience noise generation due to the stick-slip phenomenon between the tape and the friction roller, which worsens with increased winding speed, leading to vibration and inefficiency.
Innovation Solution
A winding device with a friction roller that rotates in the direction of tape feed, utilizing a gear train and self-locking mechanism to apply controlled friction resistance, reducing the sliding speed and suppressing the stick-slip phenomenon.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a friction roller is used to apply friction resistance to the continuous medium, then tension control is improved, but noise is generated due to stick-slip phenomenon
Solution Approach 1:
The friction roller is changed from a stationary component to a rotating one, driven by a roller driving portion. This dynamic transformation allows the roller surface to move in the same direction as the tape, reducing relative velocity and suppressing the stick-slip phenomenon that causes noise, while still maintaining effective tension control through controlled friction.
Solution Approach 2:
The rotational speed of the friction roller is controlled to match a specific relationship with the tape feeding speed. By adjusting the roller's rotation parameters, the linear velocity at the contact point is optimized to minimize velocity differences between the roller surface and tape, thereby reducing the stick-slip effect and associated noise while preserving tension control functionality.
2Productivity
If winding speed is increased to improve productivity, then efficiency is improved, but noise and vibration increase due to stick-slip phenomenon
Solution Approach 1:
By making the friction roller rotatable and controlling its rotation speed to increase with winding speed, the system maintains optimal velocity matching between the roller surface and tape at all operating speeds. This dynamic adjustment prevents the stick-slip phenomenon from worsening at higher speeds, allowing productivity improvement without proportional increases in noise and vibration.
3Device complexity
If a stationary friction roller is used, then structure is simplified, but stick-slip phenomenon occurs causing noise
Solution Approach 1:
The addition of a roller driving portion creates a dynamically rotating friction roller instead of a stationary one. This increase in device complexity is justified by the elimination of noise through suppression of the stick-slip phenomenon, demonstrating that controlled dynamic behavior can resolve operational problems despite added structural elements.
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 solution effectively suppresses the stick-slip phenomenon and associated noise, ensuring accurate tape feeding and reduced vibration, while maintaining appropriate tension and speed for efficient winding.
Implementation Method 1
a friction roller that contacts the continuous medium while the continuous medium is being fed to the winding portion and that applies friction resistance to the continuous medium
Implementation Method 2
there is a problem that noise is generated in the winding device due to a stick-slip phenomenon that occurs between the tape and the friction roller
Data Source
AI summary
A winding device includes a winding portion that winds a continuous medium, a friction roller that contacts the continuous medium while the continuous medium is being fed to the winding portion and that applies friction resistance to the continuous medium, and a roller driving portion that causes the friction roller to rotate in a direction in which the continuous medium is fed, in which the roller driving portion includes a roller gear train that transmits rotation of a feed motor, which is input via a winding-portion gear train, to the friction roller.