Pivoting Pipe Skiving Holder for Uniform Surface Removal
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Solution Overview
Problem
Existing skiving apparatuses struggle to achieve high-quality machining of plastic pipes with irregular surfaces due to insufficient material removal and precision issues, particularly when the pipes are not perfectly cylindrical, leading to suboptimal welds.
Innovation Solution
A skiving apparatus with a pivotable skiving arm unit and a force application unit that maintains the orientation of the skiving knife relative to the pipe's center axis, allowing for uniform material removal and adaptation to ovalities and diameter changes, combined with a clamp assembly for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a fixed skiving apparatus is used on non-cylindrical pipes, then the structure is simple, but the machining quality deteriorates due to insufficient material removal and inconsistent contact pressure
Solution Approach 1:
The skiving apparatus employs a pivotable arm unit that can dynamically adjust its position and orientation relative to the pipe surface. The arm unit rotates about a pivot axis to maintain the skiving knife in consistent contact with the pipe surface despite ovalities and diameter variations, transforming a static structure into a dynamic adaptive system that ensures uniform material removal
Solution Approach 2:
The apparatus changes the geometric parameters of the skiving knife position and orientation through the pivotable arm mechanism. By allowing the arm to rotate and adjust, the system adapts the knife's contact parameters (position, angle, pressure) to match the varying pipe surface geometry, maintaining optimal machining conditions throughout the skiving process
2Manufacturing precision
If the skiving knife orientation varies during machining, then the apparatus can adapt to pipe shape variations, but the machining precision deteriorates due to inconsistent material removal
Solution Approach 1:
The pivotable arm unit provides controlled dynamic adjustment of the skiving knife orientation. The arm rotates about a pivot axis to compensate for pipe ovalities and diameter changes while maintaining the knife's cutting edge at a consistent angle to the pipe surface, ensuring uniform material removal through dynamic rather than static adaptation
Solution Approach 2:
The apparatus segments the orientation adjustment function into a specific pivotable arm unit with a defined pivot axis. This segmentation allows the skiving knife to be independently positioned and oriented relative to the pipe surface, separating the adaptation function from the cutting function and enabling precise control over material removal while maintaining consistent knife orientation
3Manufacturing precision
If the skiving knife loses contact with the pipe surface, then the apparatus structure is simpler, but the machining quality deteriorates due to insufficient material removal
Solution Approach 1:
The pivotable arm unit acts as a dynamic contact maintenance mechanism that automatically adjusts the skiving knife position to maintain continuous contact with the pipe surface. As the arm rotates about the pivot axis, it compensates for surface irregularities and ensures the knife remains engaged with the material being machined, preventing loss of contact without requiring complex active control systems
Solution Approach 2:
The pivotable arm mechanism provides self-service contact maintenance through its inherent geometric design. The arm's rotation about the pivot axis automatically adjusts the knife position in response to variations in pipe surface geometry, allowing the system to self-regulate contact pressure and maintain engagement without external intervention or complex sensing and control mechanisms
Data Source
AI summary
A skiving apparatus is provided for at least partial removal of the surface of an least approximately tubular body having a center axis, in particular of a plastic pipe, comprising a clamp assembly having a center axis and at least one clamp member for clamping the skiving apparatus to the tubular body, a skiving assembly comprising a skiving arm unit, a skiving knife arrangement disposed at a first end of the skiving arm unit, and a skiving arm support that connects the clamp assembly to the skiving arm unit. The skiving arm unit is connected by its first and second ends to the skiving knife arrangement and the skiving arm support and is pivotable in the common plane with the center axis of the clamp assembly in such a way that the skiving knife arrangement keeps its orientation relative to the center axis of the clamp assembly in every pivoted position of the skiving arm unit. A clamp assembly as a tool holder for a tool such as a skiving tool is also provided, for machining an approximately tubular body having a center axis, in particular a plastic pipe, having a center axis, a mandrel disposed coaxially with the center axis of the clamp assembly, and at least one clamping device disposed on the mandrel and directed substantially radially outwards.