Redraw Sleeve Servo Actuator With Variable Speed Dwell Control
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Solution Overview
Problem
The existing redraw assembly in can bodymakers requires robust mechanical linkages to accommodate high-energy cycles, leading to wear and tear, and lacks an independent actuator for the redraw sleeve, necessitating a more efficient motion control system.
Innovation Solution
An actuator utilizing an eccentric journal coupled to a servomotor with variable rotation speed, allowing independent operation of the redraw sleeve and incorporating a collapsing redraw cylinder for precise positioning and dwell control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If robust mechanical linkages are used to accommodate high-energy cycles, then the redraw assembly can handle high-energy cycles, but wear and tear increases
Solution Approach 1:
The patent replaces the traditional robust mechanical linkage system with an independent servomotor actuator that directly controls the redraw sleeve. This substitution eliminates the need for complex mechanical linkages, thereby reducing wear and tear while maintaining the ability to handle high-energy cycles through precise electronic control and variable speed operation.
2Stability of the object's composition
If mechanical linkages are coupled to the ram drive mechanism, then the redraw sleeve motion is synchronized with the ram, but the system complexity increases
Solution Approach 1:
The patent segments the drive system by providing an independent servomotor actuator for the redraw sleeve that operates separately from the main ram drive mechanism. This segmentation allows each component to be controlled independently, simplifying the overall system architecture while maintaining proper motion coordination through electronic control signals rather than mechanical coupling.
Solution Approach 2:
The patent introduces an intermediary control system (servomotor with variable speed control) that mediates between the control system and the redraw sleeve. This intermediary allows for precise, independent control of the redraw sleeve motion without requiring direct mechanical coupling to the ram drive, thereby reducing system complexity while maintaining synchronization through electronic coordination.
3Device complexity
If a fixed-speed motor is used to drive the redraw sleeve, then the system is simpler, but the ability to control dwell time and positioning precision is reduced
Solution Approach 1:
The patent employs a servomotor with variable speed capability that allows dynamic adjustment of the redraw sleeve's motion speed. This enables precise control of dwell time at specific positions and accurate positioning throughout the stroke, achieving high manufacturing precision while maintaining reasonable system complexity through modern motor control technology.
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
This solution reduces wear and tear by decoupling the redraw sleeve's motion from the ram drive mechanism, enabling precise and efficient operation with adjustable speed control, thereby improving the can body formation process.
Implementation Method 1
an actuator with a servomotor having an output shaft with variable rotation speed
Implementation Method 2
an eccentric journal coupled to an output shaft of the servomotor
Data Source
AI summary
An actuator assembly for a redraw sleeve that operates independently of the ram drive mechanism is provided. The actuator assembly utilizes a servomotor. The servomotor is structured to provide its output shaft with a variable rotation speed so as to accommodate the need for the redraw sleeve to be in selected locations at specific times.