Sheet Material Feeding Apparatus Cam Control
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Solution Overview
Problem
Existing sheet material feeding apparatuses face challenges in accurately controlling the sheet-material releasing function and roll clearance adjusting function, particularly at high speeds, due to the difficulty in managing the vertical displacement of the sub-roll, which affects the precision and smooth operation of the feeding process.
Innovation Solution
The apparatus employs a rectilinear cam and sub-roll guide system, where the rectilinear cam moves synchronously with the press apparatus to control the sub-roll's vertical displacement through a cam follower, allowing for smooth start and stop operations, and an eccentric flange for adjusting the main roll's position to set the roll clearance, decoupling the control of the sheet-material releasing and roll clearance adjusting functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a wedge member with an inclined surface is used to control sub-roll vertical displacement, then the sheet-material releasing function is generated, but vibrations occur at high speeds due to linear relationship between horizontal shift and vertical displacement
Solution Approach 1:
The patent replaces the wedge member's inclined surface with a cam member having a cam surface. The cam surface is designed with a specific curvature profile that converts rotational motion into controlled vertical displacement of the sub-roll. This curved cam surface allows for smooth acceleration and deceleration during the releasing operation, eliminating the linear motion relationship that caused vibrations at high speeds while maintaining reliable feeding accuracy.
2Device complexity
If a single drive device controls both sheet-material releasing and roll clearance adjusting functions, then device complexity is reduced, but appropriate control of both functions becomes difficult
Solution Approach 1:
The patent divides the control system into two independent drive devices: one drive device controls the cam member for sheet-material releasing function, while another drive device controls the main roll position for roll clearance adjusting function. This segmentation allows each function to be controlled independently with optimized parameters, achieving precise control of both functions while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent implements dynamic control where the cam member's cam surface profile is specifically designed to provide smooth vertical displacement characteristics for the sub-roll during releasing operations. Meanwhile, the main roll position can be dynamically adjusted independently to optimize clearance for different sheet thicknesses. This dynamic independence allows both functions to operate at their optimal control parameters simultaneously.
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
This configuration enables precise and smooth sheet material feeding with reduced vibrations, allowing for accurate positioning and efficient operation at high speeds, while allowing independent optimization of the sheet-material releasing and roll clearance adjusting functions.
Implementation Method 1
a rectilinear cam 18 that is movable axially of the sub-roll 3, a cam follower 19 that engages with a cam surface 21 of the rectilinear cam 18
Implementation Method 2
an eccentric flange for adjusting the main roll's position to set the roll clearance
Data Source
AI summary
A main roll and a sub-roll of a sheet material feeding apparatus interpose therebetween a sheet material to intermittently feed the same to a press apparatus. A roll clearance is adjusted according to a sheet thickness by displacing the main roll up and down. A release device that temporarily releases a sheet material having been interposed by the both rolls just before the sheet material is subjected to press working by the press apparatus includes a sub-roll guide that can move up and down together with the sub-roll, a rectilinear cam, and cam followers for engagement with a cam surface of the rectilinear cam, and the release device moves the rectilinear cam axially of the sub-roll in synchronism with the operation of the press apparatus to thereby displace the sub-roll up and down through the cam followers and the sub-roll guide.