Sheet Metal Panel Feeding Alignment Using Sensor-Guided Grippers
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Solution Overview
Problem
Current metal sheet alignment methods in the metal packaging industry are complex, require significant maintenance, and are time-consuming, leading to imprecise centering and increased material waste due to the need for separate alignment steps and mechanical adjustments in both the X and Y axes.
Innovation Solution
The method involves using sensors to detect the position of the metal sheet in the X axis without contact, allowing the gripping arrangement to adapt and correct its position before gripping, eliminating the need for separate alignment mechanisms and reducing maintenance by calculating the transfer position based on sensor data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate alignment mechanisms with mechanical stops and slides are used to center the metal sheet in both X and Y directions, then alignment precision can be achieved, but device complexity and maintenance requirements increase significantly
Solution Approach 1:
The patent removes the complex mechanical alignment mechanism (stops, slides, and associated components) entirely from the system. Instead of using mechanical means to physically center the sheet, the system extracts only the essential function of positioning by using sensors to detect sheet position and the control system to calculate and execute the necessary adjustments through the gripper's movement capabilities.
Solution Approach 2:
The patent replaces the mechanical alignment system with a sensor-based detection and control-based calculation system. Optical or other sensors detect the sheet's position in the X direction, the control device calculates the required adjustment based on detected position versus desired position, and the gripper executes the correction through controlled movement, eliminating mechanical stops and slides.
2Manufacturing precision
If complex mechanical alignment systems with multiple stops and slides are implemented, then centering accuracy improves, but maintenance requirements and time consumption increase
Solution Approach 1:
The patent enables continuous operation by detecting sheet position and immediately calculating and executing the necessary alignment correction without interruption to the feeding process. The sensor detects position, the control device calculates the correction, and the gripper executes the adjustment in a continuous sequence, eliminating the time-consuming manual or mechanical alignment steps of prior systems.
Solution Approach 2:
The system performs self-alignment through automated detection and correction. The sensors automatically detect sheet position deviations, the control device automatically calculates the required correction, and the gripper automatically executes the positioning adjustment, eliminating the need for external intervention or complex mechanical alignment mechanisms.
3Manufacturing precision
If the gripping arrangement position is adapted before gripping based on sensor detection, then alignment precision improves and maintenance is reduced, but the system requires sophisticated sensor integration and control algorithms
Solution Approach 1:
The gripper arrangement serves multiple functions: it grips and transports the sheet, compensates for stacking errors in the Y direction through vertical adjustment, and corrects X direction positioning errors through lateral movement. This multi-functionality eliminates the need for separate alignment mechanisms, as the gripper itself performs all positioning corrections based on sensor feedback.
Solution Approach 2:
The system implements a closed-loop feedback mechanism where sensors continuously detect the sheet's actual position, the control device compares detected position with desired position, calculates the deviation, and commands the gripper to execute corrective movements. This feedback loop ensures precise alignment while using simple, reliable components rather than complex mechanical systems.
Data Source
Figure 1~3
Figure 4~6
Figure 7~8
AI summary
In the supplying of a sheet metal panel (1) to a punch press (20), the alignment of the sheet metal panel into the correct position takes place during entry into the punch press such that the alignment position in the supply direction is adjusted by means of stops (6, 7). The alignment in the second direction - orthogonal to the supply direction - occurs such that the position of the sheet metal panel (1) in the second direction is determined by a sensor (17) and a control device (18), and the deviation of the sheet metal panel from the predetermined alignment position in the second direction is determined by the control device. Subsequently, the alignment in the second direction occurs by means of the gripping assembly, provided for supplying the sheet metal panel to the punch press, wherein the gripping assembly is controlled in such a way that the deviation is compensated and the sheet metal panel is correctly aligned.