Plate Feed Roll Cam Profile for Maintenance Release Holding
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Solution Overview
Problem
Existing plate-like material feeding devices face challenges in safely maintaining the rolls' position during maintenance, adjusting for varying plate thicknesses, and requiring complex structures or skilled labor for resetting the control origin of circular cams, especially when power is cut off or during jamming events.
Innovation Solution
A plate-like material feeding device with a clamping and releasing mechanism using a circular cam with a projecting portion and recessed portion design, allowing for increased lift and separation of rolls, and utilizing self-weight to prevent cam rotation during maintenance, thus simplifying the configuration and eliminating the need for additional brake means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a circular cam is used for clamping and releasing mechanism, then the device can switch between clamping and releasing states, but additional brake means are required to retain rolls at releasing positions during maintenance and power cutoff
Solution Approach 1:
The circular cam is designed with a recessed portion that preliminarily receives the cam follower to automatically retain the rolls at the releasing position before power cutoff or maintenance occurs. This preliminary structural arrangement eliminates the need for additional brake means to hold the rolls during maintenance operations.
2Ease of operation
If the circular cam structure is used for switching between clamping and releasing states, then the mechanism can function, but the control origin must be reset by skilled workers during maintenance, which is complicated and time-consuming
Solution Approach 1:
The circular cam with its recessed portion enables self-alignment of the cam follower. During maintenance, the cam follower automatically returns to the recessed portion when power is restored, self-resetting the control origin without requiring skilled workers to perform complicated alignment procedures.
3Ease of operation
If a standard circular cam is used, then the basic clamping and releasing function is achieved, but the separation amount between rolls during maintenance is insufficient for good workability
Solution Approach 1:
The circular cam profile is segmented into two functional zones: a first rotational angle range for normal clamping and releasing operations, and a second rotational angle range with a projecting portion that provides increased lift amount for maintenance separation. This segmentation allows the same cam structure to serve both operational and maintenance requirements.
4Measurement precision
If the circular cam operates in a limited rotational angle range, then precise control is maintained, but the lift amount is insufficient for maintenance separation requirements
Solution Approach 1:
The circular cam is designed with dynamic profile characteristics: in the first rotational angle range, the cam profile provides precise control for normal operations, while in the second rotational angle range, a projecting portion dynamically increases the lift amount when the cam rotates to maintenance positions, providing both precision and sufficient separation as needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device enables safe and efficient operation with a larger separation amount during maintenance, reducing the complexity and cost of the system while allowing for easy adjustment of clamping and releasing states without requiring precise alignment of the circular cam and cam follower post-maintenance.
Implementation Method 1
a clamping and releasing mechanism configured to perform switching between a clamping state in which at least one of the upper roll or the lower roll coupled to a cam follower is brought close to another one and a releasing state in which at least one of the upper roll or the lower roll is separated away from another one by moving the cam follower in accordance with an outer peripheral profile of a circular cam
Implementation Method 2
The outer peripheral profile of the circular cam has a projecting portion formed to increase a lift amount in a range different from a rotation angle range during the operation that is from a rotational angle position of the circular cam in the clamping state to a rotational angle position of the circular cam in the releasing state
Implementation Method 3
having a recessed portion, which is formed in a vicinity of a top of the projecting portion and is configured to receive a part of an outer periphery of the cam follower in contact with at least two points, or a recessed portion configured to receive a part of an outer periphery of the cam follower in surface contact with a part of a bottom surface of the recessed portion
Data Source
AI summary
A plate-like material feeding device configured to convey a plate-like material by sandwiching the plate-like material between a lower roll and an upper roll performs switching between a clamping state in which at least one of the upper roll or the lower roll is brought close to another one and a releasing state in which the at least one of the upper and lower rolls is separated away from another one by moving a cam follower in accordance with an outer peripheral profile of a circular cam. The outer peripheral profile of the circular cam has a projecting portion in a range different from a rotation angle range of the circular cam during operation, and has a recessed portion, which is formed in a vicinity of the top of the projecting portion and is configured to receive a part of an outer periphery of the cam follower.