Screen Panel Support Frame Pre-Curvature for Vibratory Separator Fabrication
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Solution Overview
Problem
Existing screen panel assemblies for vibratory separators, such as shale shakers, often require mechanical straightening due to curvature issues caused by epoxy shrinkage during the fabrication process, leading to potential damage and reduced operational efficiency.
Innovation Solution
A jig assembly is used to clamp and hold support frame components during fabrication, inducing a pre-curvature that counterbalances subsequent curvature during unitization, minimizing the need for mechanical straightening by reducing post-unitization curvature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If epoxy material is used to unitize screen panel components, then the components are securely bonded together, but the epoxy shrinkage during curing causes curvature and bowing in the support frame
Solution Approach 1:
The support frame is pre-curved during fabrication to anticipate and counterbalance the curvature that will occur during epoxy curing. By applying preliminary action in the opposite direction of the expected deformation, the frame maintains its flatness after the epoxy shrinks and cures.
Solution Approach 2:
A preliminary anti-curving action is applied to the support frame during fabrication to counteract the harmful curvature effect that will be generated by epoxy shrinkage. This preliminary anti-action creates an equal and opposite deformation that neutralizes the final curvature, resolving the contradiction between strong bonding and frame flatness.
2Shape
If mechanical straightening is performed on curved support frames, then flatness is restored, but the screening material and perforated plate may be damaged or dislodged
Solution Approach 1:
The support frame is pre-curved during fabrication to anticipate and counterbalance the curvature that will occur during epoxy curing. By applying preliminary action in the opposite direction of the expected deformation, the frame maintains its flatness after the epoxy shrinks and cures.
Solution Approach 2:
A preliminary anti-curving action is applied to the support frame during fabrication to counteract the harmful curvature effect that will be generated by epoxy shrinkage. This preliminary anti-action creates an equal and opposite deformation that neutralizes the final curvature, resolving the contradiction between strong bonding and frame flatness.
3Length of stationary object
If low-profile support frames are used to reduce overall assembly height, then space efficiency is improved, but the frames are more susceptible to curvature during unitization
Solution Approach 1:
The support frame is pre-curved during fabrication to anticipate and counterbalance the curvature that will occur during epoxy curing. By applying preliminary action in the opposite direction of the expected deformation, the frame maintains its flatness after the epoxy shrinks and cures.
Solution Approach 2:
The fabrication parameters of the support frame are modified to induce a specific pre-curvature that compensates for the epoxy shrinkage effect. By changing the geometric parameters of the frame during fabrication, the design accommodates the low-profile requirement while preventing excessive curvature during unitization.
4Manufacturing precision
If multiple layers of screening material are unitized with the support frame, then screening effectiveness is improved, but the epoxy shrinkage causes increased curvature and bowing
Solution Approach 1:
The support frame is pre-curved during fabrication to anticipate and counterbalance the curvature that will occur during epoxy curing. By applying preliminary action in the opposite direction of the expected deformation, the frame maintains its flatness after the epoxy shrinks and cures.
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 method significantly reduces the amount of mechanical straightening required, maintaining flatness and straightness tolerances in screen panel assemblies, thereby enhancing their operational reliability and longevity.
Implementation Method 1
performing a welding operation to weld together the support members while the support members are clamped to the base plate, the welded together support members comprising a support frame and the welding operation inducing a first post-fabrication amount of curvature in the support frame
Implementation Method 2
curvature issues caused by epoxy shrinkage during the fabrication process
Data Source
AI summary
A method is disclosed that includes fabricating a screen panel support frame having a curved non-planar shape, wherein the curved non-planar shape has a first amount of post-fabrication curvature. The method further includes performing a screen panel unitization process to unitize the screen panel support frame having the first post-fabrication amount of curvature with at least a plurality of layers of screening material, the screen panel unitization process reducing the curvature of the screen panel support frame from the first post-fabrication amount of curvature to a second post-unitization amount of curvature that is less than the first post-fabrication amount.