Pittsburgh Seam Roller Assembly for Wrinkle-Free Duct Closure
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Solution Overview
Problem
Existing Pittsburgh Seam closing apparatuses are inefficient due to the need for precise orientation of duct sections, lack of adaptability for varying metal gauges and lengths, and the tendency to produce wrinkles or waves in the seam during closure.
Innovation Solution
A vertical Pittsburgh Seam closing apparatus with an improved seam forming assembly and carriage system that allows duct sections to be positioned vertically regardless of orientation, featuring adjustable clamping and guide members to accommodate different lengths and gauges, and a dual carriage system for complete seam closure in a single pass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional Pittsburgh Seam closing apparatuses are used, then seam closure is achieved, but precise orientation of duct sections is required which reduces efficiency
Solution Approach 1:
The seam forming roller is made movable along the seam rather than requiring the duct section to be precisely oriented. The roller travels dynamically along the length of the seam, adapting to the duct's position and eliminating the need for precise initial orientation of the duct section in the closing apparatus.
Solution Approach 2:
The invention introduces movement along the length of the seam as an additional degree of freedom. Instead of fixing the duct orientation in space, the roller moves along the seam dimension, transforming a static orientation problem into a dynamic traversal problem that is easier to accommodate.
2Adaptability or versatility
If fixed configuration closing apparatuses are used, then structure is simple, but adaptability for varying metal gauges and lengths is limited
Solution Approach 1:
The seam forming roller is made adjustable in position along the seam, allowing it to accommodate different duct lengths and configurations. This dynamic positioning capability enables the same apparatus to work with varying metal gauges and duct lengths without requiring complete reconfiguration of the closing device.
Solution Approach 2:
The movable seam forming roller design creates a universal closing apparatus that can handle multiple duct configurations, gauges, and lengths with a single device. The roller's ability to traverse and reposition along the seam makes the apparatus multi-functional, eliminating the need for multiple specialized closing devices.
3Manufacturing precision
If conventional closing methods are used, then seam closure is achieved, but wrinkles or waves are produced in the seam
Solution Approach 1:
The movable seam forming roller applies closing force dynamically along the entire length of the seam rather than at fixed points. This continuous movement allows the roller to gradually form and smooth the seam, preventing the formation of wrinkles and waves that occur with static closing methods.
Solution Approach 2:
The roller traverses the seam before final closing, preliminarily forming the seam geometry and eliminating potential defect sites. This preliminary traversal action prepares the seam for final closure in a wrinkle-free state, preventing harmful surface defects from developing during the closing 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 apparatus enhances efficiency by eliminating the need for precise orientation, supports a range of metal gauges from 26 to 16 gauge, and prevents wrinkles, significantly reducing manual peening and improving seam quality.
Implementation Method 1
the V-shaped roller member will bend the overhanging edge portion of a Pittsburgh Seam so as to close the Seam
Data Source
AI summary
A vertical Pittsburgh Seam closing apparatus having a base supporting surface, a track mechanism for moving a carriage assembly which holds seam forming members used to close a Pittsburgh Seam, a pair of upper and lower guide members for guiding the duct section into a proper vertical position, and upper and lower clamping members positioned inside the duct section and adjacent the inside portion of the Pittsburgh Seam to be closed, the upper guide members and clamping member being selectively movable and adjustable for accommodating different duct section lengths. In one embodiment, the seam forming assembly includes three roller members mounted in vertical arrangement to each other, one roller member being V-shaped in configuration and the other two roller members being substantially cylindrical in shape. The V-shaped roller member may also include one or more projecting members for forming dimples in the closing process to prevent shifting and/or slipping of the closed seam.