Press Feed Roll Release Timing From Stamping Load Detection
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Solution Overview
Problem
The timing at which the signal is output from the rotary cam switch in press systems is adjusted manually, requiring repeated adjustments each time the press die set is changed, and there is no automation for coordinating the press machine and feeding device.
Innovation Solution
A press system with a holding device, press machine, and feeding device that includes load detection means and control means to automatically set the timing for switching rolls between closed and open states based on load detection and pin length, ensuring coordinated operation with the press machine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of the rotary cam switch timing is performed, then the coordination between press machine and feeding device can be achieved, but the adjustment process requires repeated operations and consumes time
Solution Approach 1:
The system performs preliminary detection of the stamping load waveform before determining the release timing. By detecting the load waveform in advance and identifying the stamping start timing, the system can calculate the roll release timing automatically without manual adjustment, thus reducing adjustment time while maintaining coordination accuracy.
Solution Approach 2:
The system uses load detection means to detect the actual stamping load and feeds back this information to the control means. Based on the detected load waveform and pin length, the control means automatically determines the optimal release timing, replacing manual adjustment with automated feedback-based control.
2Adaptability or versatility
If manual adjustment is performed each time the press die set is changed, then the timing can be adapted to the new die set, but the process lacks automation and requires repeated manual intervention
Solution Approach 1:
The system enables self-service by allowing the control means to automatically determine the release timing based on the detected load waveform and pin length information. When the press die set is changed, the system automatically adapts to the new configuration through load detection and calculation, eliminating the need for repeated manual adjustments.
Solution Approach 2:
The system changes the control parameter from fixed manual settings to dynamic parameters based on detected load characteristics. By using the load waveform shape and pin length as variable parameters, the system automatically adapts to different press die sets without manual intervention.
3Reliability
If the rolls are kept in closed state continuously, then the coil material is securely clamped, but the material cannot be released for stamping operation
Solution Approach 1:
The system dynamically switches the rolls between closed and open states based on the stamping operation phase. The control means determines the optimal release timing by analyzing the load waveform, enabling the rolls to transition from a continuously closed state to a dynamically controlled state that opens at the precise moment needed for stamping.
Solution Approach 2:
The control means performs preliminary analysis of the load waveform to determine when the rolls should be released. By detecting the stamping start timing from the load waveform in advance, the system can prepare for the state transition and release the rolls at the optimal moment before the stamping action begins.
Data Source
AI summary
A press system and a control method of the press system that can automatically set a timing for coordinating a press machine and a feeding device. A leveler feeder includes feed rolls that convey a coil material to the press machine in a closed state in which the coil material is clamped, and are brought into an open state in which the coil material is released when stamping by the press machine is started. The press machine includes a sensor for detecting a load F at a time of the stamping, a pilot pin that is inserted into a hole pierced in the coil material for positioning at a time of the stamping, and a controller for controlling the leveler feeder and the press machine so as to perform the stamping in coordination with each other. The controller determines a release start timing Tos (a position Ps+L) at which the feed rolls are switched from the closed state to the open state based on a result of detecting by the sensor as well as a length L of the pilot pin.