Pipe End Chamfering With Self-Centering Pins and Burr Removal
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Solution Overview
Problem
Existing methods for chamfering plastic pipe ends are laborious, uncertain, and require complex, expensive devices, making them difficult to use effectively under construction site conditions, and often result in incomplete or unsafe installations.
Innovation Solution
A handheld device with a flat body part and pins for centering, equipped with chamfering means such as saw blade teeth or a slanting rim, that can be attached to a drill, allowing for precise and reliable chamfering of both the outer and inner edges of the pipe, while removing burrs and ensuring proper installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a knife is used to form a chamfer on a pipe end, then the device is simple, but the process is difficult and laborious with uncertain outcome
Solution Approach 1:
The patent introduces a drill as an intermediary power source to drive the chamfering device, transforming a manual knife-based process into a mechanically assisted operation. The drill provides consistent rotational force, eliminating the laborious manual effort while maintaining device simplicity.
Solution Approach 2:
The chamfering device is designed to be self-centering through the interaction of its pins with the pipe's inner surface. When the device is pressed against the pipe end, the pins automatically locate and center the device on the pipe axis, eliminating the need for complex alignment procedures and ensuring consistent chamfer quality.
2Reliability
If conventional chamfering devices are used, then the chamfering function is achieved, but the devices are complex, cumbersome, and expensive
Solution Approach 1:
The chamfering device is segmented into simple, discrete components: a flat body part, multiple pins for centering, and chamfering means on the outer rim. This segmentation allows each component to perform its specific function independently, reducing overall device complexity while maintaining reliability.
Solution Approach 2:
The device combines multiple functions into a single tool: the pins serve both as centering elements and burr removers, while the outer rim provides chamfering. This multi-functionality eliminates the need for separate centering devices, burr removers, and chamfering tools, reducing device complexity and cost.
3Productivity
If the pipe end is not properly chamfered, then installation may proceed quickly, but seal popping occurs and installation safety is compromised
Solution Approach 1:
The device performs preliminary actions by removing burrs from both the inner and outer edges of the pipe end during the chamfering process. This preliminary burr removal prevents subsequent seal popping and installation failures, ensuring both speed and safety without requiring separate burr removal steps.
Solution Approach 2:
The chamfering operation is merged with burr removal operations. The same rotational motion and contact forces used to create the chamfer also remove burrs from the inner and outer edges, combining multiple necessary preparation steps into a single operation that ensures both installation speed and safety.
Data Source
AI summary
In the disclosed solution, a device for chamfering a pipe (1) end has a body part (6) having means for fastening it to an adapter (9) to be placed in a chuck of a handheld drill. The body part (6) further has at least two formed parts such as pins (7), facing forward from the body part (6) and adaptable to settle inside the pipe (1) to be chamfered. On the outer rim of the body part (6), there are chamfering means to chamfer the outer edge of the end of the pipe (1).