Servo Press Transport Motion Planning for Peak Power and Cycle Time
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Solution Overview
Problem
The existing servo press systems face challenges in maximizing machine speed while maintaining efficient material handling and energy management, as conventional motion planning methods often result in slower press speeds and increased material handling times due to synchronization requirements and peak power peaks.
Innovation Solution
A method for motion planning that calculates a movement curve for the transport device outside the press working spaces, allowing for targeted deceleration without affecting loading and unloading processes, and optimizing the offset between servo presses to minimize total material transport time and peak power usage, thereby enabling maximum performance and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the offset between presses is increased to optimize energy management and reduce peak power, then power peaks are reduced, but the material transport time increases and press speed decreases
Solution Approach 1:
The transport movement is divided into two independent segments: a first movement segment from the first press to an intermediate position, and a second movement segment from the intermediate position to the second press. This segmentation allows each segment to be optimized independently, enabling the offset between presses to be increased for energy management while maintaining fast material transport through optimized motion curves in each segment.
Solution Approach 2:
The patent uses dynamic motion planning with independently adjustable motion curves for each transport segment. The motion curves can be dynamically optimized to minimize transport time while accommodating increased press offsets, allowing the system to adapt between energy efficiency and productivity requirements.
2Productivity
If the transport system operates at maximum speed to increase productivity, then material handling time is reduced, but synchronization with press cycles becomes difficult and energy management deteriorates
Solution Approach 1:
By segmenting the transport movement into independent controllable segments, the system can optimize each segment's speed profile separately. This allows maximum speed operation in segments where it benefits productivity, while coordinating with press cycles to avoid peak power consumption during critical synchronization points.
Solution Approach 2:
The patent changes the parameters of motion curves independently for each transport segment, allowing optimization of speed, acceleration, and timing parameters to achieve both high productivity and efficient energy management by avoiding peak power consumption during press synchronization.
3Length of stationary object
If the feed movement is slowed down to increase the offset between presses, then the offset is increased for better energy management, but the total material handling time increases and press speed decreases
Solution Approach 1:
The feed movement is segmented into independent movement segments that can be executed with different timing characteristics. This allows the offset between presses to be increased while maintaining fast overall material handling through optimized motion in each segment, preventing the need to slow down the entire feed movement.
Data Source
Figure 1~2
Figure 3~4C
AI summary
The invention relates to a motion planning system for a transport system of a servo press plant, a motion control system for a transport system of a servo press plant, and an associated computer program product taking into account an angle offset optimized with regard to peak performance.