Roto-translating Arm Cutting Tubular Elements Orthogonally
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Solution Overview
Problem
Existing methods for subdividing continuous tubular elements, such as those made of paper or cardboard, into independent elements face issues with precision cutting due to non-orthogonal cutting member angles, leading to poor cutting quality and increased complexity in mechanics, particularly at higher production speeds.
Innovation Solution
A roto-translating arm with a motorized disc-shaped knife that moves in a circular path orthogonal to the tubular element's axis, eliminating oscillating movements and ensuring the cutting member remains parallel and orthogonal throughout the cutting process, utilizing an articulated quadrilateral structure driven by motorized belts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotating support is used for cutting members, then the cutting speed can be increased for higher productivity, but the cutting members are not always in a position orthogonal with respect to the axis of the continuous tubular element, resulting in poor cutting precision
Solution Approach 1:
The patent employs a dynamically adjustable cutting member position system where the cutting member can be radially adjusted relative to the rotating support arm. This allows the cutting member to maintain optimal orthogonal positioning during rotation, resolving the conflict between high-speed rotation for productivity and precise orthogonal cutting for quality.
Solution Approach 2:
The patent introduces an intermediary adjustment mechanism between the rotating support arm and the cutting member. This intermediary system enables independent control of the cutting member's radial position, allowing it to compensate for angular deviations and maintain orthogonality with the tubular element axis throughout the rotation cycle.
2Manufacturing precision
If oscillating actuators or toothed wheels are incorporated to maintain orthogonality, then cutting precision can be improved, but the device complexity increases significantly
Solution Approach 1:
The patent extracts the complex oscillating actuator and toothed wheel mechanisms from the system and replaces them with a simpler radial adjustment mechanism. This extraction eliminates the need for multiple rotating joints and complex synchronization systems while maintaining the essential function of orthogonal cutting.
Solution Approach 2:
Instead of using complex oscillating mechanisms to actively maintain orthogonality, the patent inverts the approach by allowing the cutting member to be passively positioned radially outward where it naturally maintains orthogonality during rotation, eliminating the need for active oscillating control systems.
Data Source
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AI summary
Assembly (10) for subdividing an advancing continuous tubular element (11) into a plurality of tubular elements (11'), said assembly (10) being of the type comprising a cutting device (12) integrally borne by a movable arm (13), said arm (13) being movable in such a manner that cyclically the cutting end of said cutting device (12) defines a circular cutting path (T) which intersects at least partially said tubular element (11) in order to subdivide it into said tubular elements (11'), in which said movable arm (13) integrally bearing said cutting device (12) is roto-translating in such a manner that said cutting device (12) along the entire circular cutting path (T) is always parallel to itself and orthogonal to the axis (A) of said tubular element (11).