Seamless Cladding Pipe Rolling for Interface Temperature-Force Control
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Solution Overview
Problem
Existing seamless metal cladding pipe technologies face challenges in achieving high interface bonding strength and uniformity due to limited action time and pressure distribution, leading to defects like uneven wall thickness and low interface strength, particularly in roll bonding processes.
Innovation Solution
A continuous rolling device with interfacial temperature-force controllability, featuring a multi-roller skew rolling mill set, an interfacial temperature-force controlled rolling mill set, and a sizing and finishing mill set, which includes a thermometer, annular water mist cooling, and electromagnetic induction heating for precise temperature control, and controlled rolling rollers for pressure control, allowing for extended action time and improved metallurgical bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If three-roller skew roll bonding technology is used for continuous forming, then production efficiency is improved, but interface bonding strength deteriorates due to very short actual action time
Solution Approach 1:
The rolling process is divided into multiple independent rolling rollers (at least 4 rollers) arranged in series along the rolling direction. Each roller provides a separate bonding zone, allowing the total bonding time to be extended while maintaining continuous production. The segmentation of the bonding process across multiple rollers resolves the contradiction by providing sufficient action time without sacrificing productivity.
Solution Approach 2:
The rolling rollers are arranged at skew angles relative to the rolling direction, creating a three-dimensional bonding path. This dimensional arrangement allows the blank to pass through multiple bonding zones sequentially, extending the effective bonding time and length without increasing the cross-sectional footprint, thus maintaining high productivity while improving bonding strength.
2Duration of action of moving object
If rolling rollers are made longer to increase action time, then interface bonding strength is improved, but cross-interference occurs due to uniform distribution of rollers
Solution Approach 1:
The rolling rollers are arranged with asymmetric skew angles relative to the rolling direction, rather than being uniformly distributed. This asymmetric arrangement optimizes the bonding path and spacing between rollers, allowing longer effective action time while preventing cross-interference. The non-uniform distribution of rollers along the rolling direction creates optimal spacing that avoids harmful interactions.
3Productivity
If cold continuous roll bonding is used, then production efficiency is improved, but interface strength deteriorates with only mechanical bonding standard
Solution Approach 1:
The process parameters are changed from cold rolling to warm or hot rolling conditions, where the blank is heated to elevated temperatures before or during the rolling process. This parameter change enables metallurgical bonding at the interface, significantly improving bonding strength while maintaining continuous production efficiency. The temperature parameter modification transforms the bonding mechanism from mechanical to metallurgical.
4Duration of action of moving object
If skew rolling rollers are divided into multiple sections, then action time is extended, but device complexity increases with more sections and racks
Solution Approach 1:
Each rolling roller is designed to perform multiple functions: it provides bending force, applies compression force, and creates friction for gripping the blank. This multi-functionality reduces the need for separate components and mounting structures, extending action time without proportionally increasing device complexity. The integrated design of rollers with combined functions simplifies the overall system.
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 solution enables accurate control of interface temperature, pressure, and action time, enhancing bonding strength and uniformity, resulting in high-quality seamless metal cladding pipes with improved comprehensive performance and size accuracy, while reducing the formation of intermetallic compounds that weaken the interface.
Implementation Method 1
an annular water mist cooling apparatus...for cooling and heating the primary roll bonding blank
Implementation Method 2
an electromagnetic induction heating apparatus...for cooling and heating the primary roll bonding blank
Implementation Method 3
two ends of the controlled rolling roller are respectively mounted on the two racks through corresponding screwdown apparatuses
Data Source
AI summary
Disclosed are a continuous rolling device and method with interfacial temperature-force controllability for a seamless metal cladding pipe. The device comprises a multi-roller skew rolling mill set, an interfacial temperature-force controlled rolling mill set and a sizing and finishing mill set sequentially distributed along a rolling axis; and the interfacial temperature-force controlled rolling mill set comprises an interface temperature control module and an interface pressure control module sequentially distributed along the rolling axis, the interface pressure control module comprises two racks and a plurality of controlled rolling rollers circumferentially and evenly distributed along the rolling axis, two ends of the controlled rolling roller are respectively mounted on the two racks through corresponding screwdown apparatuses, and the interface pressure control module realizes passive driving through a spiral pushing force or a traction force.