Brush Tamping Machine Wiper Segmentation for Stability
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Solution Overview
Problem
Existing brush tufting devices face challenges with high production costs and short service life due to the fragile geometry of the wiper, which is subjected to high stress and requires precise alignment with the wire geometry, limiting its stability and longevity.
Innovation Solution
The design separates the bending part and stripper, allowing them to move perpendicularly, with the stripper having stable projections that only engage specific sections of the wire, enabling a thicker and more stable wiper structure, and incorporating a deformation pin with lateral ribs for additional stability, along with a guide groove for the tongue to ensure precise contact and improved guiding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the wiper is designed with thin walls to match the wire geometry, then the device can achieve precise wire guidance, but the wiper becomes fragile and has short service life
Solution Approach 1:
The wiper is segmented into multiple fingers (typically 3-5 fingers) that are spaced apart rather than forming a continuous thin wall. Each finger is individually structured with sufficient thickness for strength, while the spacing between fingers allows wire passage. This segmentation resolves the contradiction by providing both structural integrity and functional precision.
Solution Approach 2:
The wiper fingers have non-uniform cross-sections with thicker regions at the roots for strength and thinner regions at the tips for precision wire contact. This local variation in geometry allows the wiper to have both high reliability (thick roots) and high manufacturing precision (thin tips for accurate wire guidance).
2Reliability
If the wiper is made thicker for stability, then the service life increases, but the wire guidance precision and alignment difficulty increase
Solution Approach 1:
By segmenting the wiper into multiple fingers with spacing between them, the structure achieves both thickness (for stability) and precision (through the spaced fingers that guide the wire). The fingers can be thick at the base for stability while maintaining precise wire contact at the tips.
Solution Approach 2:
The wiper fingers extend in multiple spatial dimensions - vertically for thickness/stability, horizontally for spacing/wire passage, and have tapered profiles. This multi-dimensional geometry allows simultaneous achievement of stability and precision that cannot be achieved with simple uniform thickness.
3Device complexity
If the bending part and stripper are integrated, then the device structure is simpler, but the operational flexibility and wire deformation control are reduced
Solution Approach 1:
The wire processing system is segmented into distinct functional modules: a bending part for initial wire shaping and a stripper for final wire preparation. This segmentation allows each module to be optimized for its specific function, providing operational flexibility and adaptability while maintaining reasonable overall complexity.
Solution Approach 2:
Both the bending part and stripper are designed with movable components that can adjust their positions and motions dynamically. The bending part can accommodate different wire types and deformation requirements, while the stripper can adapt its stripping action based on wire characteristics, providing versatility without excessive complexity.
Data Source
Figure 1a~1d
Figure 2a~2d
Figure 3~4
AI summary
A brush stuffing device for stuffing and securing at least one tuft of bristles by means of a loop provides that a wire piece (16) is bent around a deformation pin (18) and the bent wire piece (16) is pulled off by means of a wiper (30). The wiper (30) does not have a shape adapted to the bent wire piece, but only contacts the wire piece (16) at spaced-apart, separate projections.