Transfer Press Phase Adjustment for 3D Die Interference Avoidance
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Solution Overview
Problem
Conventional transfer press systems using servo motors face interference issues due to complex pressing and transfer motions, leading to inefficiencies in production and incorrect determination of interference, which affects productivity and accuracy.
Innovation Solution
A motion setting method that creates a three-dimensional operating curved surface based on the relative distance of a retainer to a standard upper die, determining if it falls within an interference region, and adjusting the relative phase of the transfer motion to prevent interference, using a control device to manage the press and transport device motions in a three-dimensional coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two-dimensional coordinate system is used for interference line diagrams, then device complexity is reduced, but measurement precision deteriorates leading to incorrect interference determination
Solution Approach 1:
The patent transitions from a two-dimensional coordinate system to a three-dimensional coordinate system for representing interference line diagrams. The third dimension represents the stroke direction of the press machine, allowing accurate depiction of interference regions in space. This dimensional expansion enables precise determination of whether operating curves intersect with interference regions, solving the problem of incorrect interference determination while maintaining manageable system complexity through systematic spatial modeling.
2Productivity
If servo motors are used for press machine and transport device, then productivity is improved through high SPM, but reliability deteriorates due to interference from complex pressing and transfer motions
Solution Approach 1:
The patent performs preliminary interference analysis by creating three-dimensional interference line diagrams before actual operation. The system calculates potential interference regions based on pressing motion and transfer motion parameters, then adjusts the transfer motion timing or path in advance to avoid these regions. This preliminary detection and adjustment prevent interference during high-speed servo motor operation, ensuring reliable production at high SPM.
Solution Approach 2:
The system uses feedback by comparing the operating curved surface (representing actual pressing and transfer motions) with the interference curved surface (representing hazardous regions). When the operating curve approaches or enters the interference region, the system provides feedback to adjust the transfer motion timing or press machine parameters, ensuring interference-free operation while maintaining high productivity.
Data Source
AI summary
A transfer press includes a press machine that moves a slide up and down in accordance with pressing motion, and a transport device that moves a retainer in accordance with transfer motion to transport a workpiece. The transfer press includes a creation unit, a determination unit, and a phase adjustment unit. The creation unit creates a three-dimensional operating curved surface based on the provisionally set pressing motion and the provisionally set transfer motion. The determination unit compares a standard upper die interference curved surface with the operating curved surface in the same three-dimensional coordinate system to determine whether the operating curved surface is present within an interference region of the standard upper die interference curved surface. The phase adjustment unit changes a relative phase of the transfer motion relative to the pressing motion when the operating curved surface is present within the interference region.