Roughened Steel-Aluminum Composite Plate for Stronger Rolling Bonds
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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, which current cladding methods struggle to overcome, particularly in the rolling process.
Innovation Solution
A composite plate is created by roughening the surface of one plate with striations, increasing the area subjected to rolling, and using a specific rolling process with a roughening device that includes a grinding belt and dedusting components to enhance bonding, resulting in a composite plate with improved shear strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If rolling method is used to manufacture steel-aluminum composite plate, then equipment simplicity and ease of mass production are improved, but bonding strength is insufficient due to material property differences
Solution Approach 1:
The invention applies preliminary action by roughening the surface of the aluminum plate before the rolling process. This pre-treatment creates striations and increases surface area, preparing the surface to better accept the steel layer during subsequent rolling, thereby improving bonding strength while maintaining the simplicity of the rolling method
Solution Approach 2:
The invention applies local quality by creating non-uniform surface characteristics through roughening treatment. The aluminum plate surface is transformed from smooth to having striations and varying roughness in different regions, which locally enhances mechanical interlocking with the steel layer, thereby improving overall bonding strength without changing the global rolling process
2Strength
If surface roughening with striations is applied, then bonding strength is improved through increased contact area, but device complexity increases due to additional roughening equipment
Solution Approach 1:
The invention merges the surface roughening function with the existing rolling equipment. The roughening is achieved by modifying the rolling rolls themselves to have roughened surfaces, combining two functions (roughening and rolling) into a single integrated component, thereby improving bonding strength without proportionally increasing device complexity
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 achieves a higher bonding strength between steel and aluminum plates, suitable for applications like smartphone frames, with a shear strength range of 170 MPa to 245 MPa, addressing the limitations of existing methods.
Implementation Method 1
a roughening friction roller (3) 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 first side surface of the first plate and the first side surface of the second plate are rolled to connect
Implementation Method 3
the striations of which adjacent striations have a pitch of 0.005 mm to 0.03 mm account for more than 90% of all the striations
Data Source
AI summary
The present invention provides a composite plate, a composite plate roughening device, and a method for manufacturing a composite plate, and relates to the technical field of metal plate materials. The composite plate includes a first plate and a second plate, wherein a first side surface of the first plate is provided with striations, the first side surface of the second plate and the first side surface of the first plate are rolled to connect, and the striations of which adjacent ones have a pitch of 0.005 mm to 0.03 mm account for more than 90% of all the striations. For the composite plate described in the embodiments of the present invention, the first side surface of the first plate is roughened such that the first side surface of the first plate and/or the first side surface of the second plate is configured with striations, which increases an area of the first plate and the second plate subjected to rolling, whereby the composite plate produced by combining the first plate and the second plate has a higher bonding strength and thus a stronger bonding.