Helical Chain Pipe Machining Device Feed Adjustment
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Solution Overview
Problem
Conventional scraper chains for machining cylindrical objects, such as pipes, require complex and time-consuming adjustments for optimal feed rate and tension, limiting precision and ease of use due to the need for axial sliding of support rollers, which inhibits smooth and reliable feed motion.
Innovation Solution
A machining device with hingedly connectable chain links forming a closed chain ring, featuring a feed adjuster that allows axial displacement of chain links to align support rollers in a helical line, enabling smoother, more precise, and adjustable feed motion without axial sliding, and accommodating various pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the feed rollers are pivoted to adjust the feed rate, then the feed motion can be controlled, but the adjustment requires great operator experience and is time-consuming
Solution Approach 1:
The patent changes the geometric parameter of the chain ring by allowing radial displacement of chain links from the central axis. This creates variable pitch helical paths, enabling continuous adjustment of the feed rate parameter without complex pivoting mechanisms or operator experience requirements.
Solution Approach 2:
The chain ring transitions from a static circular configuration to a dynamic helical configuration where chain links can radially displace. This dynamic restructuring allows the feed rate to be adjusted by changing the helical pitch, making the system adaptable without time-consuming manual adjustments.
2Ease of operation
If the support rollers are made to slide at an angle over the lateral surface to enable feed motion, then axial feed can be achieved, but the feed motion is inhibited and becomes less reliable
Solution Approach 1:
The patent introduces a helical curvature to the chain ring configuration, where support rollers follow a helical path around the workpiece. This curved trajectory naturally produces axial feed motion without requiring sliders to move at angles, eliminating the inhibition and improving reliability while maintaining smooth operation.
3Adaptability or versatility
If the pivot range of feed roller axes is limited, then the structure remains compact, but the feed rate range is restricted to a relatively small amount
Solution Approach 1:
The patent adds a radial dimension to the chain link positioning, allowing displacement perpendicular to the central axis. This creates a new degree of freedom that expands the feed rate adjustment range from limited angular pivoting to continuous radial positioning, achieving wide adaptability without increasing structural complexity.
4Stability of the object's composition
If the scraper chain is tensioned around the object with support rollers aligned in the circumferential direction, then the chain remains stable, but the support rollers must slide at an angle which inhibits feed motion
Solution Approach 1:
The patent pre-configures the chain links with radial displacement capabilities and helical guide structures before operation. This preliminary arrangement allows the support rollers to naturally follow helical paths during operation, eliminating the need for angular sliding while maintaining chain stability through the helical geometry.
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 solution simplifies feed rate adjustment, reduces operational force, and allows for a wider range of feed settings, ensuring consistent and reliable machining performance across different pipe diameters without requiring specialized operator experience.
Implementation Method 1
support rollers for rolling on the lateral surface
Implementation Method 2
the chain links being connectable in such a way that they form a closed chain ring around the object to be machined, and further comprising a feed adjuster capable of reversibly adjusting an axial position of facing ends of two chain links parallel to the axis of the closed chain ring relative to each other
Data Source
AI summary
A machining device for machining the lateral surface of an approximately cylindrical object in portions thereof includes a chain for annularly surrounding the object to be machined. The chain consists of at least two hingedly connectable chain links, one of which is a tool holder having at least one tool for machining the lateral surface. The device also includes support rollers for rolling on the lateral surface. The at least one other chain link is a chain connecting link. The chain links are connectable in such a way that they form a closed chain ring around the object to be machined. The machining device further includes a feed adjuster capable of reversibly adjusting an axial position of facing ends of two chain links parallel to the axis of the closed chain ring relative to each other.