Pinch Roll Twist Correction for Aircraft Frame Web Surfaces
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Solution Overview
Problem
Existing devices correct twist in aircraft frame components by altering the shape of rollers, making it difficult to finely adjust the degree of correction due to the non-uniform twisted states caused by various factors during forming.
Innovation Solution
A processing device with a transporting unit and a pressing unit that sandwiches a frame-shaped object between contact portions, allowing for precise adjustment of twist correction by balancing the central and end portion regions, and optionally includes rolls and a detecting unit for precise movement and force control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shape of the roller is changed to correct twist, then the twist correction function is provided, but it becomes difficult to finely adjust the degree of correction
Solution Approach 1:
The invention makes the roller shape adjustable during operation. The roller includes a movable section that can be positioned at different locations along the roller axis, allowing the effective working shape to be dynamically changed. This enables fine adjustment of the twist correction degree without manufacturing multiple fixed-shaped rollers, as the same roller can adapt its shape configuration based on the specific twist conditions of the workpiece.
2Manufacturing precision
If rollers with different shapes are manufactured to adjust correction degree, then fine adjustment of twist correction is possible, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention makes a single roller perform multiple functions by enabling it to assume different effective shapes. The roller body includes multiple sections with different geometric characteristics, and a positioning mechanism allows selective engagement of these sections. This universal roller design eliminates the need for multiple specialized rollers, reducing device complexity while maintaining the capability to correct various degrees of twist.
Solution Approach 2:
The roller incorporates a movable positioning mechanism that allows the effective working section to be dynamically adjusted. This dynamic reconfiguration enables the same physical roller to function as different roller types (e.g., different diameters, different groove configurations) depending on the twist correction requirements, thereby avoiding the complexity of manufacturing and managing multiple different rollers.
3Device complexity
If the roller shape is fixed, then the device structure is simple, but it cannot adapt to non-uniform twisted states of the frame
Solution Approach 1:
The roller is designed with movable sections that can be repositioned along the roller axis based on the detected twist characteristics of the workpiece. This dynamic adaptability allows the roller to match the non-uniform twisted state of different regions of the frame, providing effective correction while maintaining relatively simple device structure compared to having multiple fixed rollers.
Solution Approach 2:
The system includes a detection mechanism that measures the twist state of the workpiece and provides feedback to the control system. Based on this feedback, the positioning mechanism adjusts the movable section of the roller to the appropriate location, enabling the roller shape to adapt to the actual twisted state of the frame being processed.
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
Enables easy and precise correction of twist in aircraft frame components by adjusting the pressing force and movement of contact portions, improving the flatness of plate surfaces and reducing the number of steps required for contour roll forming.
Implementation Method 1
a pressing unit that has a first contact portion coming into contact with a central region on one surface side of the first surface portion in a direction intersecting the extending direction and a second contact portion coming into contact with a central region on the other surface side of the first surface portion, and presses the object to be processed such that the object to be processed is sandwiched between the first contact portion and the second contact portion
Data Source
AI summary
A processing device processes a frame-shaped workpiece which extends in a prescribed extension direction, and includes, integrally, a plate-shaped web surface portion, a plate-shaped first flange portion that bends and extends from one end of the web surface portion, and a plate-shaped second flange portion which bends from the other end of the web surface portion and extends in the opposite direction to the first flange portion. The processing device includes a shaping device which conveys the workpiece in the extension direction, and an exit side pinch roll device provided further downstream, in the workpiece conveying flow direction, than the shaping device. The exit side pinch roll device includes a first roll which presses a central region of an upper surface side of the web surface portion, and a second roll which presses a central region of a lower surface side of the web surface portion.