Industrial Automation Display Device Gap-Filling Adhesive Assembly
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Solution Overview
Problem
The assembly of user interface display devices in industrial automation systems is time-intensive and costly due to stress transmission between components and a high number of parts, leading to potential deformation or breakage and increased tolerance stack-up.
Innovation Solution
The use of a gap-filling adhesive to couple the display to the bezel, reducing the number of parts and stress on components by applying the adhesive in a gap between the display and the bezel's frame, thereby minimizing pressure on adhesives and mechanical tolerance stack-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple components are coupled together to form the display device, then the structural integrity and functionality are improved, but the number of parts increases leading to longer assembly time and higher costs
Solution Approach 1:
The patent combines multiple mounting functions into a single adhesive application. The gap-filling adhesive simultaneously bonds the display to the bezel, fills tolerance gaps, and provides stress distribution, eliminating the need for separate mechanical fasteners and reducing assembly steps.
Solution Approach 2:
The adhesive serves multiple functions: it acts as a bonding agent, a gap-filling material, a stress-distributing medium, and a tolerance compensation mechanism. This multi-functionality reduces the number of separate components needed in the assembly.
2Ease of manufacture
If multiple components are coupled together with traditional methods, then the display device is assembled, but stress is transmitted between components causing deformation or breakage
Solution Approach 1:
The gap-filling adhesive acts as an intermediary material between the display and bezel. Instead of direct rigid contact that transmits stress, the adhesive layer absorbs and distributes stresses, preventing stress concentration that would cause component deformation or breakage.
Solution Approach 2:
The patent changes the mechanical parameters of the bonding interface by using a compliant adhesive material with specific durometer and viscosity properties. This allows the bonding material to deform under stress rather than transmitting rigid forces between components.
3Stability of the object's composition
If more parts are used to assemble the display device, then the structural stability is improved, but the tolerance stack-up increases
Solution Approach 1:
The adhesive's viscosity and gap-filling properties are optimized to compensate for dimensional variations. The adhesive flows to fill gaps within a specific range, automatically compensating for tolerance variations in the display and bezel components without requiring tight manufacturing tolerances.
Solution Approach 2:
The use of a composite adhesive system (combining gap-filling and bonding properties) allows the assembly to accommodate tolerance variations. The adhesive material composition is designed to provide both structural bonding and tolerance compensation in a single material system.
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 approach reduces the time and cost of assembly, minimizes stress on components, and decreases the mechanical tolerance stack-up, enhancing the stability and efficiency of the display device assembly.
Implementation Method 1
a cover lens optically bonded to the front face of the display with an optical-grade adhesive
Implementation Method 2
a quantity of gap-filling adhesive disposed at one or more locations within the gap between the frame and the one or more outer edges of the display. The quantity of gap-filling adhesive couples the display to the bezel.
Data Source
AI summary
A user interface display device for displaying information associated with an industrial automation system may have a display that has a front face and one or more outer edges, a cover lens optically bonded to the front face of the display with an optical-grade adhesive, and a bezel that has a frame. The frame is disposed about the display, and the bezel defines a gap between the frame and the one or more outer edges of the display. The display device may also have a quantity of gap-filling adhesive disposed at one or more locations within the gap between the one or more outer edges of the display and the frame of the bezel. The quantity of gap-filling adhesive may couple the display to the bezel.