Fiber Bundle Placement Head Force Control for Narrow Curved Dies
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automated fiber bundle placement apparatuses face issues with deformation of the pressing part when the placement die has a width dimension smaller than the pressing part, leading to uneven pressing force distribution and potential wrinkles in the fiber bundle, especially when the die surface is curved.
Innovation Solution
The apparatus incorporates a drive control device that adjusts the pressing force based on the contact width of the placement die, ensuring the pressing force corresponds to the die's width dimension, thereby reducing deformation and maintaining consistent fiber bundle placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a predetermined pressing force is applied to the pressing part regardless of contact width, then the pressing mechanism is simple to control, but the pressing part deforms excessively when the placement die width is smaller than the pressing part width
Solution Approach 1:
The pressing force is made dynamically adjustable based on the contact width between the pressing part and placement die. The drive control device changes the pressing force according to the actual contact conditions, transitioning from a static predetermined force to a dynamic adaptive force that matches the contact width, thereby preventing excessive deformation.
Solution Approach 2:
The pressing force parameter is changed according to the contact width. When the contact width is smaller than the pressing part width, the pressing force is reduced to prevent deformation. The drive control device adjusts this parameter in real-time based on the geometric relationship between the pressing part and placement die.
2Adaptability or versatility
If the pressing part contacts only a portion of the placement die, then the apparatus can handle various die widths, but the pressing force is unevenly distributed causing localized deformation
Solution Approach 1:
The pressing force is adjusted to match the local contact conditions. When only a portion of the pressing part contacts the placement die, the pressing force is reduced proportionally to maintain uniform force distribution across the contact area, preventing localized deformation while maintaining versatility for different die widths.
3Adaptability or versatility
If the pressing part is pressed against a curved surface, then the apparatus can handle complex die geometries, but the reactive force varies in the width direction causing increased deformation
Solution Approach 1:
The pressing force is dynamically adjusted to compensate for the varying reactive forces on curved surfaces. The drive control device modifies the pressing force in real-time based on the curvature and orientation of the placement die surface, maintaining pressing part shape stability while handling complex geometries.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An automated fiber bundle placement apparatus including a placing head (6) having a pressing device (13), and a multi-jointed robot (7). The pressing device (13) includes a pressing part (13a), a pressing mechanism (45) having a drive device (46), and a drive control device (30). The drive control device (30) includes a drive command unit (35) configured to output a drive command corresponding to a contact width of a placement die (5) with the pressing part (13a), the contact width being a length in the width direction of a part of the placement die (5) facing in parallel to a contact range of the pressing part (13a) during pressing against the placement die (5), and is configured to control drive of the drive device (46) to apply the pressing force corresponding to the drive command to the pressing part (13a).