Press System Fatigue Calculation via Slide Stroke Segmentation
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Solution Overview
Problem
Conventional press machine fatigue calculation methods cannot accurately assess the overall degree of fatigue, particularly for driving parts, leading to difficulties in determining the precise fatigue level of the press machine as a whole.
Innovation Solution
A press system and control method that include a detection device for press load, a number acquisition device for cycle counting, a stress calculation device, and a degree-of-fatigue calculation device, which divide the press loading region into sections to calculate stress and fatigue based on applied loads and cycles, enabling precise fatigue assessment of both the body frame and driving parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the press loading region is divided into multiple sections for calculating stress and fatigue cycles, then the measurement precision of fatigue degree is improved, but the device complexity increases
Solution Approach 1:
The press loading region is divided into multiple sections along the slide stroke direction. Each section independently calculates stress and fatigue cycle counts based on local load conditions. This segmentation enables precise fatigue assessment of both body frame and driving parts by capturing spatial variations in stress distribution throughout the pressing process.
2Manufacturing precision
If continuous load is applied during pressing to ensure molding quality, then the manufacturing precision is improved, but the fatigue accumulation in press machine increases
Solution Approach 1:
The system continuously monitors press load and calculates fatigue degree in real-time during the pressing operation. By providing feedback on the accumulated fatigue state, the system enables proactive maintenance scheduling before fatigue reaches critical levels, thus preserving press machine reliability while allowing continuous operation for high-precision molding.
Data Source
AI summary
A press system includes: a press device configured to perform press working on a workpiece; a detection device configured to detect a press load applied for the press working by the press device; a number acquisition device configured to acquire a number of cycles of press loading, for each section of a plurality of sections into which a press loading region over a total length of a slide stroke is divided; a stress calculation device configured to calculate a stress applied to the press device, the stress corresponding to the press load for each section of the press loading region; and a degree-of-fatigue calculation device configured to calculate a degree of fatigue of the press device, based on respective stresses applied to the press device and respective numbers of cycles of press loading, for the plurality of sections of the press loading region.