Linear Driven Gripper Carriages for Sheet Registration Alignment
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Solution Overview
Problem
Existing sheet punching and embossing machines require extensive setup times due to the need for precise alignment of tools, which impairs productivity.
Innovation Solution
A method and machine design that uses optical measurement systems and linearly driven gripper carriages to pre-align and register sheets, allowing for independent positioning and incremental adjustments to ensure accurate alignment and processing, reducing setup times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tools are precisely aligned in traditional punching machines, then manufacturing precision is improved, but productivity deteriorates due to extensive setup times
Solution Approach 1:
The patent replaces manual mechanical alignment methods with an optical measurement system that uses cameras and sensors to detect sheet positions and calculate correction values automatically. This substitution eliminates time-consuming manual adjustments while maintaining high alignment precision through automated optical measurement and computational correction.
Solution Approach 2:
The patent performs preliminary alignment actions by pre-aligning sheet edges before gripping, and by calculating correction values in advance based on optical measurements taken before processing. The linear drives are positioned in advance and execute incremental movements to achieve precise registration, eliminating the need for time-consuming setup adjustments during operation.
2Device complexity
If manual alignment methods are used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent replaces simple mechanical alignment references with an optical measurement system comprising cameras and sensors that provide high-precision detection of sheet positions, skew angles, and registration accuracy. This optical system achieves superior measurement precision compared to mechanical methods while the automated calculation and execution of corrections keep the overall system complexity manageable.
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 significantly reduces setup times and enhances productivity by enabling precise and efficient alignment of sheets and tools, improving the overall processing accuracy and efficiency of the machine.
Implementation Method 1
the printed image of the sheet is optically measured with a measuring system that is formed by cameras and/or sensors
Implementation Method 2
The side-aligned sheet is transferred to grippers by linearly driven gripper carriages of the sheet transport system
Data Source
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AI summary
The invention relates to a method for operating a sheet-fed die-cutting and embossing machine and a sheet-fed die-cutting and embossing machine comprising a sheet feeder, a die-cutting station, at least one further processing station, a machine control system, and a sheet transport system with rotating gripper carriages. Grippers are attached to the gripper carriages, enabling the sheets to be grasped at a gripper edge and moved through the machine. The rotating gripper carriages are driven at their outer ends by at least one linear drive, and the sheets are aligned in their sheet-holding positions in the die-cutting station and the processing stations by means of the incremental movement generated by the linear drives.