Peeling Tool Localized Surface Preparation for Pipe Saddle Attachment
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Solution Overview
Problem
Existing scraping devices for cylindrical plastic pipes are inefficient in preparing surfaces for saddle pieces, as they either remove unnecessary material from the entire circumference or weaken the pipe, and are not suitable for partial surface preparation needed for secure and durable connections.
Innovation Solution
A peeling device with a cylindrical knife roller and guide elements of varying diameters, allowing precise partial surface removal, with the cutting edge aligned parallel to the pipe axis, and independently rotatable guide elements for stable and friction-free operation, along with a protective cover for safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the entire circumference of the pipe is processed with known peeling devices, then the surface is completely prepared for welding or gluing, but unnecessary material is removed and the pipe strength is weakened
Solution Approach 1:
The peeling device is designed to process only the local area where a saddle piece needs to be attached, rather than the entire pipe circumference. The guide element with reduced diameter creates a localized peeling zone that matches the saddle piece installation area, removing material only where necessary while preserving pipe strength in other areas.
Solution Approach 2:
Instead of performing complete circumferential peeling, the device applies partial action by limiting the peeling operation to the specific sector needed for saddle piece attachment. This avoids excessive material removal while still achieving sufficient surface preparation for the intended welding or gluing location.
2Manufacturing precision
If the entire circumference of the pipe is uncovered for processing, then complete surface preparation is possible, but this is not possible or sensible on construction sites
Solution Approach 1:
The device focuses peeling operation on the local area requiring preparation rather than requiring complete pipe exposure. The guide element's reduced diameter enables the cutting edge to engage only the necessary portion of the pipe surface, allowing operation in confined construction site conditions where full pipe access is unavailable.
Solution Approach 2:
The peeling operation is segmented into a localized zone defined by the guide element's reduced diameter, separating the processing area from the rest of the pipe. This segmentation allows the device to function effectively without requiring the entire pipe circumference to be accessible or exposed.
3Device complexity
If guide elements are fixed to the knife roller, then the structure is simple, but the guidance precision and adaptability are reduced
Solution Approach 1:
The guide element is designed to rotate independently on the drive shaft rather than being fixed to the knife roller. This dynamic configuration allows the guide element to self-adjust and maintain precise alignment with the pipe surface during operation, improving guidance precision while maintaining structural simplicity through the use of basic rotational mounting.
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 effective and secure attachment of saddle pieces by achieving a constant and controlled material removal, maintaining pipe strength and ensuring a flat, scratch-free surface for welding or gluing, while being ergonomic and adaptable for different operators and work situations.
Implementation Method 1
the guide elements can roll on the pipe surface
Data Source
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AI summary
The present invention relates to a peeling device for at least partially removing the outer circumferential surface of rotationally symmetrical objects, in particular cylindrical plastic tubes, comprising a peeling head (100) with a drive shaft (130) having a central longitudinal axis (A), with a cylindrical cutter roller (110) arranged non-rotatably on the drive shaft (130) and coaxially thereto, and with at least one peeling blade (112) arranged in the cutter roller (110) which has a cutting edge (114) projecting from the surface of the cutter roller and forming the maximum outer diameter of the peeling head (100). Furthermore, two cylindrical guide elements (120, 122) having central longitudinal axes are provided, which are arranged coaxially to the end faces of the cutter roller (110).