Extruded Pipe Cutter With Electromechanical Yielding Force Control
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Solution Overview
Problem
Existing devices for cutting extruded plastic pipes to length require complex sensor systems and energy conversion from electric to hydraulic to manage cutting forces, leading to inefficiencies and potential damage from overloads, especially due to the need for precise temperature control and mechanical play in hydraulic systems.
Innovation Solution
An electromechanical drive system with a rotating receiver and spring elements allows for efficient energy and control signal transmission, enabling the cutting tool to yield to forces greater than the required separating force, eliminating the need for hydraulic systems and reducing mechanical play, thus minimizing damage and improving control across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If hydraulic energy conversion is used to actuate the drive, then sufficient force can be generated for cutting, but the device complexity and energy loss increase
Solution Approach 1:
The patent replaces hydraulic energy conversion with direct electric drive. The electromechanical drive unit generates cutting force electrically without requiring hydraulic energy conversion, thereby reducing device complexity while maintaining sufficient cutting force. This substitution eliminates hydraulic pumps, valves, and fluid transmission components.
Solution Approach 2:
The patent extracts and removes the hydraulic energy conversion mechanism from the system. By eliminating the hydraulic subsystem entirely and using direct electric drive, the device complexity is reduced while the essential cutting function is preserved through electromagnetic force generation.
2Measurement precision
If multiple sensors and control elements are used to adjust the separating unit, then positioning precision is improved, but the device complexity and cost increase
Solution Approach 1:
The electromechanical drive unit incorporates integrated positioning control that operates autonomously without requiring external sensor systems. The drive unit itself provides the necessary positioning precision through its control electronics, eliminating the need for separate sensors and control elements.
Solution Approach 2:
The electromechanical drive unit performs multiple functions simultaneously: it generates cutting force, controls positioning, and provides feedback control all within a single integrated system. This multi-functionality eliminates the need for separate sensors and control elements that would otherwise be required for each function.
3Stability of the object's composition
If the cutting tool is made rigid to withstand cutting forces, then cutting stability is improved, but the ability to yield to excessive forces is reduced
Solution Approach 1:
The patent introduces dynamic characteristics to the cutting tool system through the electromechanical drive. The drive can dynamically adjust the tool's rigidity characteristics, allowing the tool to be rigid during normal cutting for stability, but capable of yielding or flexing when excessive forces are detected, thereby preventing damage.
Solution Approach 2:
The electromechanical drive enables real-time parameter changes in the cutting tool system. By controlling the electromagnetic field and mechanical coupling, the system can change its effective stiffness parameter dynamically - maintaining high rigidity during stable cutting while allowing controlled yielding when force thresholds are exceeded.
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 electromechanical system provides precise control and flexibility in cutting, allowing for rapid stop-and-go operations, reduced waste, and efficient energy use, with improved reliability and reduced mass, enabling cutting sequences to be executed within seconds without the need for extensive temperature stabilization.
Implementation Method 1
an electromechanical drive that is configured to move a carrier
Implementation Method 2
an element for energy transfer operatively connected to a moving part of the rotating receiver, the element for energy transfer being operatively coupled to an energy supplier arranged on the rotating receiver
Data Source
AI summary
A separating device cuts an extruded pipe to length. The separating device has a separator that is rotatably mounted and rotates about an extrusion axis. Cutting tools are arranged on the separator and move in accordance with received energy. A rotating receiver is in the separator. An electromechanical drive is configured to move a carrier that supports a cutting tool. The electromechanical drive and the carrier are on the rotating receiver. An energy conductor is connected to a moving part of the rotating receiver, the energy conductor being coupled to an energy supplier arranged on the rotating receiver. The energy and control commands are transmitted to the electromechanical drive via the energy conductor and the energy supplier. The electromechanical drive, the carrier, or the cutting tool yield to a force counter to a separating force that is greater than a required separating force for cutting the extruded pipe.