Malleable Press Fitting Geometry for Stronger Pipe Joints
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Solution Overview
Problem
Existing cast pipe fittings can be difficult to install and may have poor structural integrity, leading to potential failures during use.
Innovation Solution
A cast body for a pipe fitting with a specific geometry, including a first body end and a second body end, an inner body surface defining a fitting bore, and an outer body surface with varying distances from the axis, designed to facilitate press fitting and improve structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cast pipe fittings are used, then manufacturing is simpler, but structural integrity is poor leading to potential failures
Solution Approach 1:
The fitting body incorporates varying wall thicknesses at different locations, with thicker walls at stress-prone areas and thinner walls where stress is lower. This non-uniform thickness distribution optimizes structural integrity at critical locations while maintaining manufacturability through standard casting processes.
2Reliability
If complex geometries are added to improve structural integrity, then reliability increases, but manufacturing precision requirements increase
Solution Approach 1:
The design modifies geometric parameters such as wall thickness, bore diameter, and overall dimensions to achieve optimal structural integrity. By carefully selecting and varying these parameters throughout the fitting body, the invention enhances reliability while keeping the geometry within achievable casting tolerances.
3Productivity
If press fitting method is used, then installation speed improves, but manufacturing precision requirements increase
Solution Approach 1:
The fitting incorporates specific dimensional parameters including precise bore diameters, wall thicknesses, and overall dimensions that enable press fitting installation. These parameters are optimized to allow the pipe to be pressed into the fitting with appropriate interference fits while maintaining structural integrity and sealing performance.
Data Source
AI summary
A method of connecting a pipe to a cast fitting, the method can include casting a body including a first body end and a second body end disposed opposite from the first body end, wherein the body defines an axis extending from the first body end to the second body end, wherein the body includes a first neck disposed proximate to the first body end wherein the body further includes an inner body surface defining a bore extending through the body from the first body end to the second body end, and wherein the body further includes an outer body surface spaced from the inner body surface a predetermined wall thickness.