Continuous Strip Cutting Head with Variable Geometry
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Solution Overview
Problem
Existing cutting machines for strip materials wound in coils face inefficiencies due to discontinuous operation modes, material waste, mechanical stress, and complexity, particularly when attempting to cut pieces continuously in a flexible and cost-effective manner.
Innovation Solution
A cutting method and machine design that enables continuous movement of the strip material in one direction, with a cutting head moving linearly in an orthonormal plane to nest pieces within the strip's width, synchronized with the material's speed, using a variable-geometry or stationary-geometry mechanism controlled by a central unit to optimize cutting path and reduce waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If discontinuous operation mode is used with stopping the strip movement for cutting, then cutting precision is improved, but productivity is reduced due to long complete cycle times
Solution Approach 1:
The patent implements continuous movement of the strip material through the cutting zone without stopping, while the cutting head performs cutting operations along a programmed path. This eliminates idle time between cutting cycles and maintains continuous productive action, resolving the contradiction between cutting precision and productivity.
Solution Approach 2:
The cutting head is made dynamically movable along both longitudinal and transversal axes during continuous strip movement. This dynamic positioning capability allows the cutting head to follow complex paths and maintain precision while the strip moves continuously, enabling both high precision and productivity.
2Adaptability or versatility
If back-and-forth movement of strip material is used to cut pieces according to any contour, then adaptability is improved, but mechanical stress increases causing premature fatigue
Solution Approach 1:
Instead of moving the strip material back and forth through the cutting zone, the patent inverts the approach by keeping the strip moving continuously in one direction and moving the cutting head back and forth along the longitudinal axis. This inversion eliminates harmful mechanical stress on the strip handling system while maintaining contour cutting flexibility.
Solution Approach 2:
The cutting head is equipped with dynamic positioning capabilities along both longitudinal and transversal axes, allowing it to adapt to any contour shape while the strip moves continuously. This dynamic system provides the needed versatility without requiring reverse strip movement.
3Manufacturing precision
If three laser beam cutting heads with overlapping work zones are used, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent uses a single cutting head with dynamic positioning capabilities along both longitudinal and transversal axes. This single movable cutting head can access any position in the cutting zone, providing the same flexibility and precision as multiple fixed heads but with significantly reduced device complexity.
Solution Approach 2:
The single cutting head is designed with multi-functional capability to perform all cutting operations across the entire strip width by moving along both axes. This universal cutting head replaces the need for multiple specialized cutting heads, reducing complexity while maintaining precision.
4Adaptability or versatility
If conventional cutting machines with separate unwinding and cutting zones are used, then adaptability is improved, but loss of time increases due to unloading and forward movement phases
Solution Approach 1:
The patent merges the unwinding zone, cutting zone, and evacuation zone into a single integrated system where the strip moves continuously through all zones without stopping. The cutting head moves independently within the cutting zone while the strip progresses continuously, eliminating idle time between operations and reducing total cycle time while maintaining flexibility.
Data Source
AI summary
A machine for flatbed cutting of pieces from a strip of material (3) wound in a coil and moving continuously. The cutting zone (ZD) comprises a cutting head (17) supported by a mobile support (20) translatably mounted on a stationary longitudinal beam (18) disposed parallel to the direction of movement (A) of the strip of material. It is coupled to a first actuator (Mx) for moving the cutting head (17) linearly along a longitudinal axis (X) parallel to the beam and comprises a variable-geometry mechanism (21-24) coupled to a second actuator (My) for moving the cutting head (17) linearly along a transverse axis (Y), perpendicular to the longitudinal axis (X). A central control unit (9) controls the actuators to move the cutting head (17) in the cutting zone (ZD) along a path determined by the contour of the pieces (2) to be cut and the speed of the material (3).