Expandable Conduit Bending Shoe With Preset Groove Width
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Solution Overview
Problem
Conduit bending apparatuses require multiple shoes with grooves of different widths to accommodate conduits of varying diameters, leading to operational inefficiency and the need for a single shoe capable of expanding to fit a range of conduit sizes.
Innovation Solution
A conduit bending shoe with an outwardly-opening groove that can expand in size to accommodate conduits of varying diameters, featuring a spacing preset mechanism to control the movement of opposing sidewalls, allowing the groove to adjust to different conduit sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple shoes with different groove widths are used to accommodate conduits of varying diameters, then all conduit sizes can be bent, but the device complexity and operational efficiency deteriorate due to the need to switch between multiple shoes
Solution Approach 1:
The shoe is designed with movable sidewalls that can be adjusted to different positions, allowing the groove width to dynamically change according to the conduit diameter being bent. This eliminates the need for multiple fixed-width shoes by providing a single shoe that can adapt its geometry in real-time.
Solution Approach 2:
A single shoe structure is designed to perform multiple functions by accommodating conduits of various diameters through adjustable sidewalls. The shoe becomes a universal tool that replaces multiple specialized shoes, each designed for a specific conduit size.
2Device complexity
If a single shoe with fixed groove width is used, then the device complexity is reduced, but the adaptability deteriorates as it cannot accommodate conduits of different diameters
Solution Approach 1:
The sidewalls are designed as dynamic components that can move between different positions, transforming a static fixed-width groove into a dynamic variable-width groove. This maintains structural simplicity while adding adaptability through controlled movement of the sidewalls.
Solution Approach 2:
The shoe is segmented into movable sidewall components rather than being a single rigid piece. This segmentation allows independent adjustment of each sidewall to match different conduit diameters while maintaining the overall simplicity of the shoe structure.
3Adaptability or versatility
If the groove width is increased to accommodate larger conduits, then larger conduit sizes can be bent, but the manufacturing precision deteriorates for smaller conduits due to poor contact between groove sidewalls and conduit surface
Solution Approach 1:
The adjustable sidewalls allow the groove width to be dynamically matched to the specific conduit diameter being bent. For small conduits, the sidewalls are positioned close together to provide tight contact and precise bending control. For larger conduits, the sidewalls are spaced farther apart, maintaining optimal contact throughout the bending process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a single shoe to efficiently bend conduits of varying diameters without the need for multiple shoes, reducing operational complexity and ensuring consistent bending quality.
Implementation Method 1
the width of the outwardly-opening groove is capable of expanding in size to enable the variable width of the outwardly-opening groove of the shoe to accept the conduit regardless of which of the different diameters of conduit is provided
Implementation Method 2
pressing the roller against the conduit while simultaneously rotating the shoe about its rotation axis so that the outer periphery of the shoe moves in rolling engagement along the length of the conduit
Implementation Method 3
one-half of a radial cross section of the conduit being bent (i.e. the half closer to the center of the radius of the bend being formed) is exposed to compressive forces
Implementation Method 4
the other, or opposite, one-half of the radial cross section of the conduit being bent (i.e. the half further from the center of the radius of the bend being formed) is exposed to tension forces
Data Source
AI summary
A conduit bending apparatus having a shoe mounted for rotation about an axis and having an arcuate-shaped periphery defining an outwardly-opening groove having sidewalls for closely accepting the outer surface of a conduit desired to be bent utilizes a shoe comprised of a pair of platen half-sections which are joined in a side-by-side relationship and which collectively define the outwardly-opening groove. In addition, the groove has a width as measured laterally across the opening thereof, and the pair of half-sections are joined together in a manner which permits the pair of half-sections to be moved toward and away from one another. The shoe include a spacing preset mechanism adapted to control movement of opposing sidewalls to accommodate a preset alteration in the variable width of the outwardly-opening groove.