Laptop Hinge Area Forming With Local Thickening to Cut CNC Waste
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Solution Overview
Problem
CNC machining of thicker metal pieces for hinge areas in computing devices is costly and wasteful, as it requires machining the entire laptop cover and hinge areas, resulting in excessive material waste and high processing time.
Innovation Solution
A process involving stamping, squeeze forging, and CNC machining to thicken the hinge areas, using a thinner sheet of material, such as aluminum, to achieve the desired mechanical strength and aesthetic appearance of a thicker piece while reducing material waste and machining costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If CNC machining is used to machine thicker metal pieces for hinge areas, then mechanical strength and aesthetic appearance are improved, but material waste and processing time increase
Solution Approach 1:
The patent applies local quality by using stamping to selectively thicken only the hinge area (local region) while keeping the rest of the laptop cover thin. This creates a localized thickened portion with enhanced mechanical strength precisely where needed, without requiring the entire cover to be made of thick material, thereby reducing overall material consumption and waste.
Solution Approach 2:
The patent employs preliminary action by performing stamping operations before final CNC machining. The stamping process pre-forms the thickened hinge area, so that subsequent CNC machining only needs to perform minimal finishing work rather than removing large amounts of material from a uniformly thick blank, thus reducing material waste and processing time.
2Strength
If CNC machining is used to machine thicker metal pieces for hinge areas, then mechanical strength is improved, but processing time and cost increase
Solution Approach 1:
The stamping process performs the bulk material deformation and thickening operation in advance, creating a pre-formed hinge area with the required thickness. This preliminary action significantly reduces the amount of material removal needed in subsequent CNC machining operations, thereby shortening processing time and reducing manufacturing costs while maintaining the mechanical strength of the hinge area.
Solution Approach 2:
The patent changes the material thickness parameter locally in the hinge area through stamping, transforming a thin sheet into a locally thickened structure. This parameter change is achieved through plastic deformation rather than adding material or machining from a thick blank, which optimizes both processing time and cost while ensuring the hinge area has sufficient mechanical strength.
3Loss of substance
If a thinner sheet of material is used, then material waste and machining costs are reduced, but mechanical strength decreases
Solution Approach 1:
The patent uses local quality by applying stamping to create a localized thickened portion in the hinge area. The overall laptop cover remains thin (reducing material waste), but the hinge area specifically is thickened to provide the necessary mechanical strength. This selective local thickening resolves the contradiction between using thin material and maintaining strength where required.
Solution Approach 2:
The patent segments the laptop cover into different functional zones: a thin main body for cost and weight efficiency, and a locally thickened hinge area for mechanical strength. This segmentation allows each zone to have optimized thickness according to its functional requirements, reducing overall material usage while maintaining structural integrity in critical areas.
4Strength
If a thicker piece of material is used for hinge areas, then mechanical strength and aesthetic appearance are improved, but material waste increases
Solution Approach 1:
The patent applies local quality by using stamping to thicken only the hinge area where mechanical strength and aesthetic appearance are required. The rest of the laptop cover remains thin, reducing overall material consumption. This localized approach ensures that material is used efficiently - only in the quantities and locations where functional and aesthetic requirements demand it.
Solution Approach 2:
The stamping process performs preliminary thickening of the hinge area before final machining operations. This preliminary action creates the necessary material volume in the hinge region without requiring the entire cover to be made from a thick blank, thereby reducing total material consumption while still achieving the desired thickness and appearance in the visible hinge area.
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 process allows for the creation of mechanically strengthened hinge areas with a perceived thickness of up to 5.00 mm using a 1.20 mm thick aluminum sheet, significantly reducing CNC machining costs and material waste while maintaining an aesthetically pleasing look.
Implementation Method 1
stamping a shape from a material with a certain thickness
Implementation Method 2
performing one or more squeeze forging operations to thicken the sides of the hinge area
Data Source
AI summary
A hinge area and processes of forming the hinge area are described. The hinge area is part of cover of a laptop computer. A material used for the cover is of a certain thickness. Stamping and forming a shape that defines the hinge area is performed on the material. The top of the shape is cut to provide for sides of the hinge area. Squeeze forging operations are performed to thicken the sides, and CNC machining is further performed on the sides.