Servo Press Conveyor Motion Planning for Offset and Power Peaks

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Solution Overview

Problem

In servo press installations, the conventional angle-based programming of conveyor systems leads to increased time required for material handling, which can result in slower pressing speeds and reduced productivity due to the need for longer offsets between presses.

Innovation Solution

A method for motion planning that calculates a motion curve for the conveyor system outside the pressing workspaces of the servo presses, allowing for a specific time interval to complete the conveyance without affecting loading and unloading processes, thereby optimizing the offset between presses.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the offset between presses is increased to allow for conveyor system conveyance time, then the conveyor system can complete material transfer, but the press must provide more time for loading and unloading which results in slower pressing speed

Engineering Contradiction:
Improveconveyance timeVSAvoidpressing speed
Core Design Contradiction:
Loss of timeVSProductivity

Solution Approach 1:

The conveyor motion is divided into multiple positioning sets instead of a single positioning set. The first positioning set handles the initial conveyance from the first press, while the second positioning set handles the subsequent conveyance to the second press. This segmentation allows the offset between presses to be extended without proportionally increasing the total conveyance time, as each positioning set can be optimized independently. The segmentation enables the press to maintain higher pressing speeds while the conveyor system completes material transfer through coordinated multiple positioning actions.

Inventive Principle:
Principle #1Segmentation

2Productivity

If the conveyor system executes transfer rapidly to increase productivity, then less time is required for material handling, but the offset between presses must be reduced which limits energy management optimization

Engineering Contradiction:
Improvetransfer speedVSAvoidoffset duration
Core Design Contradiction:
ProductivityVSDuration of action of moving object

Solution Approach 1:

The system employs dynamic motion planning where the conveyor apparatus executes different motion profiles depending on the phase of operation. During the forward motion phase, the conveyor operates at high speed to minimize transfer time and maximize productivity. During the return motion phase, the conveyor can operate at reduced speed or perform energy recovery braking. This dynamic approach allows the offset duration to be extended for energy management optimization while maintaining rapid transfer speeds during the critical material handling phase. The motion controller adjusts velocity and acceleration parameters in real-time to balance productivity requirements with energy management goals.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12208436B2Motion planning for a conveyor system of a servo press installation
Publication Date: 2025.01.28 SIEMENS AG
  • US12208436B2 patent drawing
  • US12208436B2 patent drawing

AI summary

A method for motion planning for a conveyor system of a servo press installation, a motion controller for a conveyor system of a servo press installation, and to an associated computer program product, wherein an angular offset is optimized with respect to power peaks.