Steel-Aluminum Composite Plate Bonding via Surface Striations
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Solution Overview
Problem
The challenge in manufacturing steel-aluminum composite plates lies in achieving high bonding strength due to the significant differences in material properties between steel and aluminum, particularly with the current rolling cladding method, which struggles to achieve stable quality and efficient production.
Innovation Solution
A composite plate is created by roughening the surface of one plate with striations, increasing the bonding area, and using a specialized rolling device with a steel wire brush or grinding wheel to form a strong bond between the steel and aluminum plates, enhancing the shear strength through precise control of striation pitch and surface roughness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rolling cladding method is used to manufacture steel-aluminum composite plate, then equipment simplicity and ease of mass production are improved, but bonding strength of the composite plate deteriorates
Solution Approach 1:
The invention applies preliminary action by roughening the surfaces of both steel and aluminum plates before the rolling cladding process. The surface roughening treatment creates striations and increases surface area, which prepares the surfaces to achieve better bonding during subsequent rolling. This preliminary surface preparation resolves the contradiction by enabling strong bonding through enhanced surface characteristics while maintaining the simplicity of the rolling process.
Solution Approach 2:
The invention applies local quality by creating non-uniform surface characteristics through roughening treatment. The surfaces are transformed from smooth to having specific roughness parameters (Ra values), creating localized variations in surface topology. This local modification of surface quality allows the rolling process to achieve superior bonding strength at the interface while the bulk materials retain their original properties, thus resolving the bonding strength issue without complicating the overall manufacturing process.
2Productivity
If rolling cladding method is used to manufacture steel-aluminum composite plate, then production efficiency is improved, but quality stability deteriorates
Solution Approach 1:
The invention applies parameter changes by establishing specific quantitative parameters for surface roughness (Ra values for both steel and aluminum plates) and striation characteristics. By controlling these parameters within defined ranges, the process achieves consistent bonding quality. This parameter-based approach transforms the rolling cladding process from a quality-variable method to one with predictable, stable outcomes, resolving the contradiction between production efficiency and quality stability.
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 results in a composite plate with improved bonding strength, suitable for applications like smartphone frames, offering strong bonding and minimal signal shielding with a low strength-to-weight ratio.
Implementation Method 1
a roughening device, including a machine body, a first driving member and at least one roughening friction roller, wherein the roughening friction roller is rotatably disposed on the machine body and configured for rubbing the first side surface of the first plate or the first side surface of the second plate
Implementation Method 2
the roughening friction roller...configured for rubbing the first side surface...to form striations
Implementation Method 3
the first side surface of the second plate and the first side surface of the first plate are rolled to connect
Implementation Method 4
rolled to connect...enhancing the shear strength through precise control
Data Source
AI summary
A composite plate includes a first plate (5); a second plate (16); and a first side surface of the first plate (5) including striations. A first side surface of the second plate (16) and the first side surface of the first plate (5) are rolled to connect, and wherein adjacent striations (14) have a pitch of 0.005 mm to 0.03 mm account for more than 90% of all the striations (14).