Continuous Roll Cladding of Steel Strips Without Interim Welding
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Solution Overview
Problem
Existing methods for producing composite materials by hot-rolling metal strips are limited by additional production costs and a restricted product spectrum due to the need for interim welding and the use of high-grade steel, which restricts the variety of materials that can be combined.
Innovation Solution
A method and device for producing a continuous strip-shaped composite material by unwinding metal strips from coils, joining them in a hot state, and hot-rolling them to form a single composite material, where both strips consist of steel, allowing for different grades of steel to be combined without the need for high-grade steel, and incorporating cleaning and heating apparatuses to ensure proper alignment and surface preparation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plate-shaped sheets are welded together to form a sheet pack before hot-rolling, then composite material can be produced, but additional production costs are incurred and maximum production capacity is limited
Solution Approach 1:
The invention extracts and eliminates the interim welding step from the production sequence. By directly hot-rolling metal strips from coils without preliminary welding, the process removes the bottleneck that limited production capacity, allowing continuous production at higher rates without the need for intermediate joining operations
Solution Approach 2:
The invention implements continuous production by feeding metal strips directly from coils into the hot-rolling process without interruption for welding operations. This continuous action eliminates idle time and maintains steady production flow, thereby increasing maximum production capacity while maintaining composite material quality
2Ease of manufacture
If high-grade steel is used for metal strips, then composite material can be produced, but the product spectrum is limited
Solution Approach 1:
The invention changes the material parameter by using conventional steel instead of high-grade steel for the metal strips. This parameter change expands the product spectrum to include a broader range of steel grades and types, allowing greater versatility in composite material production while maintaining manufacturing feasibility through the direct hot-rolling process
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 increases production capacity, efficiency, and expands the product spectrum by enabling the combination of various steel grades, reducing production costs and improving the quality of the composite material.
Implementation Method 1
joining together of the metal strip unwound by the first coil-unwinding apparatus and of the metal strip unwound by the second coil-unwinding apparatus in the hot state
Implementation Method 2
hot-rolling of the unwound metal strips brought toward each other so that a single continuous strip-shaped composite material consisting of the base material and the cladding material is formed by means of roll cladding
Data Source
AI summary
A device and method for producing a continuous strip-shaped composite material including a base material of metal, which is unwound in the form of a metal strip by a first coil-unwinding apparatus, and at least one cladding material of metal, which is unwound in the form of a metal strip by a second coil-unwinding apparatus. The metal base and cladding metal strips unwound by the respective coil-unwinding apparatuses are brought together in the hot state of at least 720 degrees Celsius. The unwound base and cladding metal strips brought toward each other and are joined by hot-rolling such that a single continuous strip-shaped composite material is thereby formed by roll cladding such that the composite material includes the base material and the cladding material.