Metal Flange-Resin Pipe Assembly for Stress-Resistant Fixing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resin pipes deform easily compared to metal flanges, leading to displacement and excessive stress at fixed portions, compromising durability when a metal flange is attached to a resin pipe.
Innovation Solution
A metal flange is externally fitted and integrated with a resin pipe, featuring a fixing groove and circumferential ribs to secure the flange in place without displacement, with the ribs reducing stress on the resin pipe.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal flange is attached to a resin pipe, then the durability under load is improved, but the resin pipe deforms and the flange displaces from its predetermined position
Solution Approach 1:
The invention applies local quality by creating a fixing groove with unevenness at the specific location where the metal flange contacts the resin pipe. This localized structural modification provides enhanced grip and position stability at the critical interface without requiring changes to the entire pipe or flange structure, thereby preventing displacement while maintaining overall durability.
Solution Approach 2:
The fixing groove with unevenness is pre-formed on the resin pipe surface before the metal flange is attached. This preliminary action ensures that when the flange is installed, it immediately engages with the unevenness feature, preventing deformation and displacement from the outset rather than relying on post-installation adjustments or additional fastening mechanisms.
2Strength
If a metal flange is attached to a resin pipe, then the connection strength is improved, but excessive stress is generated in the resin pipe at the fixed portion
Solution Approach 1:
The unevenness in the fixing groove creates a localized mechanical interlock that distributes the connection stress across a larger effective contact area. This local structural feature reduces stress concentration at any single point on the resin pipe while maintaining strong connection between the metal flange and resin pipe.
3Weight of moving object
If the resin pipe is used to reduce weight, then the weight is reduced, but the resin pipe easily deforms compared to metal
Solution Approach 1:
The invention creates a composite structure by combining the resin pipe with a metal flange through a mechanically interlocked fixing groove. This composite design leverages the weight advantage of resin while incorporating the strength and rigidity of metal at the critical connection point, achieving both weight reduction and resistance to deformation.
Solution Approach 2:
The unevenness feature in the fixing groove provides localized reinforcement at the connection point between the lightweight resin pipe and metal flange. This local structural enhancement prevents deformation at the fixed portion while maintaining the overall lightweight characteristic of the resin pipe system.
Data Source
AI summary
A metal flange having unevenness on a surface of an insertion hole is disposed in an insert portion in a cavity body of a mold. A resin pipe is formed by curing molten resin injected into a cavity. The metal flange is fitted to a fixing groove continuous over an entire circumference of an outer circumferential surface of the pipe in a circumferential direction. An outer circumferential surface of the fixing groove enters the unevenness on the surface of the insertion hole. A circumferential rib is formed on at least one side of both ends of the flange in a longitudinal direction of the resin pipe, abuts on an end surface of the flange, has a diameter larger than an outer diameter of the pipe, and is continuous over the entire circumference of the outer circumferential surface of the pipe in the circumferential direction.