Multi-Station Glass Sheet Cutting With Rotation and Balanced Cycle Times
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Solution Overview
Problem
Existing apparatuses for cutting laminated glass sheets suffer from inefficiencies in productivity, unbalanced cycle times, and excessive space occupation, with the first cutting station often remaining unproductive due to the need for multiple rotations and repositioning, leading to unsatisfactory production rates.
Innovation Solution
An apparatus with multiple cutting stations, including a first station for initial cuts, a rotation device, and subsequent stations with parallel cutting devices, controlled by a unit to optimize the distribution of cutting operations, ensuring balanced cycle times and efficient use of all stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a single cutting station is used with multiple rotations and repositioning, then the apparatus occupies less floor space, but the first cutting station remains unproductive due to unbalanced cycle times
Solution Approach 1:
The cutting apparatus is divided into multiple independent cutting stations (first cutting station, second cutting station, third cutting station) that operate in parallel. Each station is assigned specific cutting operations from the cutting pattern, allowing simultaneous execution of multiple cuts without requiring repeated rotations and repositioning at a single station, thus resolving the productivity loss while maintaining compact space utilization.
Solution Approach 2:
The patent transitions from a single cutting station operating in one dimension (sequential cuts with rotations) to multiple cutting stations operating in parallel dimensions. The cutting pattern is distributed across stations along the working direction, enabling concurrent cutting operations that eliminate idle time and balance cycle times, thereby increasing production rate without proportionally increasing floor space.
2Productivity
If multiple cutting stations are added to balance cycle times, then productivity increases, but the apparatus occupies more floor space
Solution Approach 1:
The cutting pattern is segmented and distributed across multiple cutting stations, with each station performing a specific subset of cuts. This segmentation allows parallel processing of cutting operations, balancing the workload and cycle times across stations, which increases productivity while the linear arrangement along the working direction minimizes the footprint compared to a single large station.
Solution Approach 2:
Each cutting station is designed as a universal cutting unit capable of performing cutting operations in its assigned direction. The stations can be configured to handle different cutting patterns and panel sizes, providing multi-functionality that reduces the need for specialized equipment and optimizes space utilization while maintaining high productivity through parallel operations.
3Loss of time
If cutting operations are distributed across multiple stations, then cycle times are balanced, but the device complexity increases
Solution Approach 1:
The cutting pattern is segmented into discrete operations assigned to specific cutting stations based on their positional capabilities. This segmentation balances the number of cuts per station, equalizing cycle times and eliminating idle time. The control unit coordinates the segmented operations, managing the increased device complexity through systematic distribution of tasks across stations.
Solution Approach 2:
The control unit implements feedback mechanisms to monitor and coordinate the operations of multiple cutting stations. It receives information about the progress of cutting operations from each station and adjusts the distribution of subsequent cuts to maintain balanced cycle times, thereby managing device complexity through intelligent control and coordination rather than simple mechanical duplication.
Data Source
AI summary
Cutting sheets of glass, or other glass substitute materials is provided. In a first step, a sheet is cut in a first cutting station in a working direction (L). Panels obtained from the cut sheet are rotated in their rest plane modifying an angular position thereof with respect to the working direction (L). Downstream of the rotation, a second cutting step and at least a third cutting step in a second cutting station and in at least a third cutting station is performed in series in the working direction (L).