Servo-Electric Press Ram Position Deviation Control
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Solution Overview
Problem
Existing servo-electric presses face challenges in controlling and regulating ram position deviations due to external and internal factors such as thermal expansion, elastic springing, and eccentric loading, which affect the reproducibility of molded parts and increase energy consumption.
Innovation Solution
The method employs a servo-electric drive system with separate servomotors for the main drive and ram position adjustment, allowing for dynamic control of the ram's tilting and immersion depth by compensating for positional deviations using a combination of preset adjustments and asymmetrical movement sequences, leveraging existing drive components to minimize additional expenditure and optimize productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If mechanical tilting compensation with push rods and motor-controlled adjusting spindles is used, then ram tilting can be compensated, but space requirements increase and device complexity increases
Solution Approach 1:
The patent extracts the tilting compensation function from a separate mechanical compensation device and integrates it into the existing servo-electric drive system. The push rods and adjusting spindles are replaced by utilizing the servo motors' capability to independently control ram position at different pressure points, thereby eliminating the need for additional mechanical compensation components.
Solution Approach 2:
The servo motors that originally served only for main drive are made multi-functional by enabling them to perform both main drive function and tilting compensation function. The drive system is configured so that the servo motors can independently adjust the position of the ram at different pressure points, allowing the same components to serve multiple purposes.
2Manufacturing precision
If separate servo motors are used for main drive and position adjustment, then ram position control precision improves, but device complexity and expenditure increase
Solution Approach 1:
The patent makes the servo motors multi-functional by enabling them to perform both main drive and position adjustment functions. The control system is configured to independently control the servo motors at different pressure points, allowing the same motors to serve dual purposes of driving the ram and adjusting its position for tilting compensation.
Solution Approach 2:
The patent merges the main drive function and position adjustment function into a single integrated drive system. The servo motors are configured to simultaneously perform both functions, and the control system combines the control signals for main drive and position adjustment into a unified control architecture, thereby reducing the need for separate dedicated components.
3Manufacturing precision
If mechanical compensation devices are added to existing presses, then position deviations can be corrected, but productivity decreases due to additional space requirements and setup time
Solution Approach 1:
The patent enables continuous position correction during the press cycle by utilizing the servo motors' capability to dynamically adjust ram position in real-time. The control system continuously monitors and adjusts the ram position at different pressure points throughout the pressing operation, eliminating the need for separate compensation steps and maintaining continuous productive action.
Solution Approach 2:
The servo-electric drive system performs self-compensation for position deviations by using its own servo motors to automatically adjust the ram position. The control system independently calculates and executes the necessary position corrections without requiring external compensation devices or additional setup steps, thereby maintaining productivity.
Data Source
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AI summary
The invention relates to a method for the control and regulation of position deviations of tappets in servoelectric presses. The aim of the invention is especially to influence the position deviations of a tappet during the passage through the lower reversal point in such a way that the depth of immersion and the tilting position of the tappet can be controlled or regulated.