Leather Cutting Machine Parallel Detection and Cutting
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Solution Overview
Problem
Existing cutting machines for leather and similar materials require sequential operations for material loading, detection of references, and position readjustment, leading to inefficiencies and increased time, as detection and processing cannot be performed in parallel with cutting.
Innovation Solution
A cutting machine design with a detection area larger than the cutting area, where TV cameras detect material references upstream, allowing simultaneous detection/processing and cutting operations, and compensating for conveyor belt precision errors by recalculating belt movements based on reference position comparisons before and after belt movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detection and processing operations are performed sequentially before cutting operations, then positioning accuracy is ensured, but productivity is reduced due to increased time expenditure
Solution Approach 1:
The patent divides the conveyor belt system into two distinct zones: a detection area upstream where TV cameras capture reference positions, and a cutting area downstream where cutting operations occur. This spatial segmentation allows detection/processing and cutting operations to occur in parallel, resolving the contradiction between positioning accuracy and productivity by enabling simultaneous operations in different spatial zones.
Solution Approach 2:
The detection area is positioned upstream of the cutting area, allowing the TV cameras to detect reference positions and the control system to calculate corrected positions before the material reaches the cutting zone. This preliminary detection and calculation enables parallel processing, maintaining positioning accuracy while improving productivity by eliminating sequential delays.
2Device complexity
If a single carriage with TV camera is used for detection, then device complexity is reduced, but detection precision is insufficient for the entire cutting area
Solution Approach 1:
The patent separates the detection function from the cutting function by placing TV cameras in a dedicated detection area upstream, rather than mounting them on the cutting carriage. This segmentation allows the detection system to cover a broader area with sufficient precision while keeping the cutting carriage simple and focused solely on cutting operations.
Solution Approach 2:
The patent introduces an intermediary computational step where the control system calculates the difference between detected reference positions and theoretical positions, then applies correction values to determine accurate cutting positions. This intermediary calculation layer enables high detection precision without requiring complex mechanical detection systems on the cutting carriage.
3Productivity
If the detection area is larger than the cutting area, then parallel operations are enabled, but device complexity increases
Solution Approach 1:
The patent implements a straightforward spatial segmentation where the detection area is defined as a portion of the conveyor belt upstream of the cutting area. This simple geometric division enables parallel operations without requiring complex additional hardware, as the detection area naturally encompasses the cutting area plus additional upstream space for early detection and processing.
Data Source
Figure 1
Figure 2
AI summary
A cutting machine (1 ), particularly for leather and similar materials, comprising a cutting area (6) provided with one or more cutting heads (3) and with an area for unloading the cut parts, the areas being arranged along a conveyor belt, material detection means (4) being provided in order to detect the position of the material before cutting it, the machine further comprising a detection area (5), arranged upstream of the cutting area (6), the material detection means (4) being arranged in the detection area (5) in order to detect the position of references provided on the material to be cut.