Slipform Paving Machine Variable Width Transition Control
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Solution Overview
Problem
Current slipform paving machines face challenges in efficiently transitioning the paving width during operations, relying on manual adjustments or external stringlines, which can be cumbersome and lack precise control.
Innovation Solution
A slipform paving apparatus with a variable frame width, steerable ground engaging units, height adjustable supports, and a mold that can change width automatically, controlled by a system using stringline sensors, cross slope sensors, and a controller to adjust direction, height, and width in response to guidance and starting signals, allowing for precise width transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment methods are used to control paving width transitions, then the machine structure remains simple, but the transition precision and efficiency deteriorate
Solution Approach 1:
The patent implements automatic feedback control by using sensors to detect the actual paving width and comparing it with the target width, then automatically adjusting the mold position and width through actuators to maintain precise width transitions without manual intervention
Solution Approach 2:
The patent replaces manual mechanical adjustment operations with an automated control system that uses sensors, controllers, and actuators to automatically adjust the mold position and width, eliminating the need for manual telescope operations while improving transition precision
2Adaptability or versatility
If two stringlines are laid out to control width transitions, then width transition capability is achieved, but the operation complexity and time consumption increase
Solution Approach 1:
The patent uses a starting signal generator to detect when the paving machine reaches the predetermined starting position for width transition, then automatically initiates the width adjustment process, eliminating the need for manual setup of multiple stringlines and reducing transition time
Solution Approach 2:
The system performs self-service by automatically detecting the starting position, calculating the required width adjustment, and executing the transition without requiring external stringline setup or manual intervention, thereby reducing operational complexity and time loss
3Adaptability or versatility
If the mold width is kept fixed, then the machine structure is simpler, but the ability to create variable width concrete structures is lost
Solution Approach 1:
The patent transforms the fixed mold into a dynamic, adjustable component that can automatically change its width during the paving operation. The mold width is controlled by actuators that respond to controller signals, enabling the creation of variable width concrete structures while maintaining a relatively simple overall machine structure
Data Source
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AI summary
A system is provided for automatically varying the mold width and thus the paving width of a molded concrete slab on the fly as the slab is being molded. An external stringline reference 100 is used to control the height and direction of a first side of the paving machine. A slope sensor 110 is used for automatic control of the height of the second side of the machine frame 12. A starting point signal generator 120 provides a signal to initiate the automatic width transition. A controller 126 controls width actuators 24, 26, 28, 30 for controlled variation of the mold width in response to the starting signal and a preprogrammed function of the controller 126.