Adjustable Pipe Expanding Tool Lever Angle Control
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Solution Overview
Problem
Existing pipe expanding tools require multiple tools with different sizes to achieve various inner diameters, leading to complex operations and increased costs, and manual adjustments are prone to operator variability.
Innovation Solution
A pipe expanding tool with adjustable levers and mandrels, featuring an adjustment screw and lock nut, allows for setting a specific angle of rotation to achieve desired inner diameters using a single tool, and detachable mandrels with different radii can be used for various diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pipe expanding tools with different sizes are prepared for respective desired inner diameters, then various inner diameters can be achieved, but operations become more complex and processing costs increase
Solution Approach 1:
The pipe expanding tool is designed with an adjustable lever system that can be set to different rotation angles, allowing a single tool to expand tubes to multiple different inner diameters. The adjustment screw mechanism enables the lever to be positioned at various angles, making the tool universal for different expansion requirements without needing multiple specialized tools
Solution Approach 2:
The tool incorporates an adjustable lever system where the rotation angle can be dynamically changed according to the desired inner diameter. The adjustment screw allows the lever position to be modified, transforming a static fixed-angle tool into a dynamic adjustable-angle tool that adapts to different expansion needs
2Manufacturing precision
If manual adjustment of lever rotation is performed, then inner diameter can be controlled, but differences in operation lead to variances in inner diameters
Solution Approach 1:
The tool incorporates a scale that provides visual feedback on the lever rotation angle, allowing the operator to accurately set and verify the rotation position. This feedback mechanism eliminates guesswork and ensures precise, repeatable settings that reduce operator variability and improve inner diameter consistency
Solution Approach 2:
The adjustment screw mechanism allows the desired lever rotation angle to be predetermined and fixed before the expansion operation. By setting the angle in advance using the screw and lock nut, the tool eliminates real-time manual adjustment during operation, reducing operator variability and ensuring consistent results
3Ease of operation
If the inside end surfaces of levers abut against each other, then rotation stops and expansion is completed, but the inner diameter is predetermined and cannot be adjusted further
Solution Approach 1:
The tool transforms the static abutment stop mechanism into a dynamic adjustable system. Instead of relying on fixed inside end surfaces to stop rotation, the tool uses an adjustment screw that can be positioned at different angles, allowing the rotation stop point to be dynamically changed according to the desired inner diameter while maintaining automatic stopping functionality
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
Enables easy and reliable expansion of tubes to desired inner diameters with a single tool, reducing operational complexity and variability, and eliminating the need for multiple tools with different mandrel sizes.
Implementation Method 1
a pipe expanding tool comprising first and second levers (22, 23) which are rotatably connected to each other through a rotary shaft (21), a pair of grips (24, 25) which are disposed on ends of the first and second levers (22, 23), a pair of jaws (26, 27) which are disposed on other ends of the first and second levers (22, 23), a pair of mandrels (57, 58) which are capable of being inserted into an open end of a tube (100) to be expanded, and adjustment means (28, 29, 30) for adjusting an angle of rotation of the first and second levers (22, 23)
Implementation Method 2
the circumferential side surfaces of the mandrels (57, 58) are pressed outwardly against the inner circumferential surface of the end of the tube (100), whereby the end of the tube (100) is expanded
Data Source
AI summary
A pipe expanding tool includes levers rotatably connected to each other through a rotary shaft, grips disposed on ends of the levers, jaws disposed on other ends of the levers, and mandrels disposed on the jaws. An adjustment screw for adjusting an angle of rotation of the levers, a lock nut for fixing the adjustment screw, and a stopper that restricts rotation of the levers are further provided.