Grooved Aluminum Housing Plate for Low-Deformation Cutting
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Solution Overview
Problem
During the machining of aluminum alloy plates for electronic device metal cases, residual stress and thermal deformation issues arise due to cutting processes, leading to material deformation and reduced durability, especially in thin plates with thicknesses of 0.6 mm to 0.65 mm.
Innovation Solution
A plate design incorporating a groove on one surface that functions as a cooling channel, where the cutting process is performed on the first part, and the groove's surface roughness is greater than the exposed surface roughness, effectively reducing thermal deformation and enhancing durability by managing heat generated during cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutting process is performed on thin aluminum alloy plates (0.6 mm to 0.65 mm thickness), then the plate can be manufactured with required dimensions, but residual stress and thermal deformation occur leading to material deformation
Solution Approach 1:
A groove structure is formed in advance on the plate before the cutting process. This groove serves as a pre-positioned heat dissipation channel that actively manages thermal stress during subsequent machining operations, preventing thermal deformation before it occurs
Solution Approach 2:
The groove structure acts as an intermediary element between the cutting tool and the plate material. It facilitates heat transfer and stress distribution, mediating the harmful effects of cutting operations on the thin plate structure
2Temperature
If cutting conditions are controlled and cooling using cutting oil is applied, then some heat is managed, but heat in the cutting process may still instantaneously reach up to 400 degrees Celsius
Solution Approach 1:
The groove structure functions as a fluid channel that enhances the effectiveness of cutting oil cooling. By providing a dedicated pathway for coolant flow, the groove system improves thermal management beyond conventional surface cooling methods
Solution Approach 2:
The groove structure fundamentally changes the thermal parameters of the cutting process by introducing active heat dissipation pathways. This transforms the thermal field distribution, reducing peak temperatures and thermal gradients that cause stress
3Shape
If conventional machining is performed on thin plates, then material is removed to achieve desired shape, but non-uniform temperature distribution occurs leading to microstructural change and thermal stress
Solution Approach 1:
The groove structure introduces local quality variation into the plate, creating regions with different thermal and mechanical properties. The groove areas serve as heat sinks and stress relief zones, while other areas maintain structural integrity, achieving both shape and reliability
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 proposed solution effectively cools the plate during cutting, reducing thermal deformation and enhancing the durability of the plate, thereby improving the manufacturing process for electronic device components.
Implementation Method 1
heat generated in the cutting process may instantaneously reach up to 400 degrees Celsius (° C.) despite the control of cutting conditions and the cooling using a cutting oil
Implementation Method 2
a non-uniform temperature distribution may occur on a processed surface due to a mechanical machining load generated in the cutting process, a plastic deformation between a cutting tool and a material of a processed product, and a great amount of cutting heat generated by friction, which may lead to a microstructural change and to the generation of thermal stress
Data Source
AI summary
A plate of a housing includes a plate layer including an inner surface defining a groove which extends in an extension direction, a cut surface directly extending from the groove, a first surface roughness of the cut surface, and a second surface roughness of the inner surface which is different from the first surface roughness. The plate layer is a remaining thickness of a preliminary plate cut to remove a thickness portion thereof, the groove is a portion of a recessed pattern of the preliminary plate which is defined by the thickness portion and the remaining thickness facing each other, and the cut surface which has the first surface roughness is an exposed surface of the remaining thickness of the preliminary plate cut along a direction intersecting the extension direction of the groove to remove the thickness portion of the preliminary plate.