Thin-Walled Heald Profile Rod with Localized Entry Zones
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Solution Overview
Problem
Existing solutions for fastening additional parts to heald frame support rods require thick-walled profiles to absorb forces, leading to increased weight and reduced working speed in high-speed weaving machines, and existing cost-effective methods are either expensive or inefficient.
Innovation Solution
A thin-walled profile bar with strategically designed entry zones on its side walls for riveting or screwing profile pieces, allowing for the use of thin-walled profiles while providing anchoring points without increasing the profile's outer dimensions, using countersunk rivets or screws that do not protrude beyond the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If thick-walled profiles are used to fasten additional parts to support rods, then fastening strength is improved, but weight increases and working speed decreases
Solution Approach 1:
The profile bar is designed with entry zones that have locally increased wall thickness only at specific positions where fastening is required, while the rest of the profile maintains thin walls. This allows the side walls to provide sufficient anchoring strength at critical points without requiring the entire profile to be thick-walled, thus resolving the contradiction between fastening strength and overall weight.
2Strength
If thick-walled profiles are used to fasten additional parts to support rods, then fastening strength is improved, but working speed is reduced
Solution Approach 1:
By concentrating the wall thickness only at entry zones where fastening occurs, the profile achieves necessary mechanical strength locally while maintaining low overall weight. This enables high-speed operation in weaving machines without compromising the fastening capability of additional parts to the support rods.
3Weight of moving object
If thin-walled profiles are used for support rods, then weight is reduced and working speed increases, but fastening capability deteriorates
Solution Approach 1:
The profile bar combines thin walls for most of its length with localized entry zones of increased wall thickness. This allows the profile to be lightweight overall while still providing robust anchoring points for fastening additional parts, thus resolving the contradiction between weight reduction and fastening capability.
Solution Approach 2:
The entry zones create three-dimensional protrusions into the cavity, adding vertical dimension to the wall thickness at specific locations. This dimensional change provides sufficient material volume for strong fastening without increasing the horizontal dimensions or overall weight of the profile.
4Ease of manufacture
If adhesive connection is used to fasten parts to aluminum profile, then cost is reduced, but production complexity and demands increase
Solution Approach 1:
The invention replaces adhesive connection with mechanical fastening using rivets or screws through entry zones. This substitution eliminates the need for specialized adhesive application processes, surface preparation, and curing procedures, thereby reducing production complexity while maintaining cost-effectiveness and structural integrity.
Data Source
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AI summary
A profile bar (15), preferably made of extruded aluminum profile, has side walls (18, 19) that feature two projecting entry zones (25, 26) extending parallel to each other, preferably over the entire length of the profile bar (15), and arranged at the same height. The distances of the two entry zones (25, 26) from the nearest web (21) are identical. In this way, the profile bar (15) can be made very thin-walled, while at the same time offering possibilities for attaching profile sections that allow for the introduction and release of larger forces into and out of the profile bar (15). This concept provides a basis for the construction of lightweight yet highly resilient weaving shafts.