Shear Plate Trajectory for Deformation-Free Profile Cutting
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Solution Overview
Problem
Conventional cutting devices struggle to reliably cut elongated profile elements with complex shapes, such as rain gutters, without causing deformation and requiring complex post-processing.
Innovation Solution
A method and device where two shear plates with cutting edges are displaced relative to each other along a trajectory that includes sections with angles greater than 5°, preferably over 15° or 30°, adapting to the profile element's shape to ensure the cutting edges are not parallel to the surface, using mechanisms like eccentric devices and positive guides to achieve a changing trajectory.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a cutting edge is guided in a straight line through the profile element, then the cutting process is simple and quick, but profile elements with complex shapes (e.g., rain gutters with semicircular cross-sections) cannot be reliably sheared without deformation
Solution Approach 1:
The cutting device transitions from a static straight-line cutting path to a dynamic curved trajectory that adapts to the profile element's shape. The cutting edge follows a predetermined curved path in the cutting plane, allowing the cutting direction to change continuously during the shearing process, thereby maintaining cutting effectiveness on complex-shaped profiles without deformation
Solution Approach 2:
The cutting trajectory parameters (curvature, direction angles) are changed to match the profile element's geometry. By adjusting the cutting path from a straight line to a curved trajectory with specific geometric parameters, the device achieves reliable cutting on semicircular and other complex cross-sections while maintaining cutting efficiency
2Device complexity
If the cutting edge is guided parallel to the wall surface over a greater distance, then the cutting path is simplified, but the affected area of the profile element is deformed but not reliably sheared off
Solution Approach 1:
The cutting device employs a dynamic cutting trajectory that continuously adjusts the cutting edge's orientation relative to the profile surface. Instead of maintaining a fixed parallel orientation, the cutting path is designed to intersect the profile surface at optimal angles throughout the cutting process, ensuring clean shearing without deformation while managing the complexity through predetermined path planning
3Device complexity
If conventional cutting devices are used on rain gutters, then the device structure remains simple, but complex post-processing is required to correct deformations
Solution Approach 1:
The cutting device incorporates a predetermined curved trajectory that is pre-calculated and programmed to match the profile element's geometry. This preliminary planning of the cutting path prevents deformation before it occurs, eliminating the need for post-processing corrections while maintaining relatively simple device structure through automated path control
Data Source
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Figure 5~6
AI summary
In a method and a cutting device (3) designed to carry out the method for cutting through an elongate profile element, the cutting device (3) has a first shearing plate (1) with a first cutting edge and a second shearing plate (2) with a second cutting edge, which can be displaced relative to one another along a trajectory (24) along a cutting plane (7) that can be predetermined by the cutting device (3), so that the first cutting edge and the second cutting edge shear off the profile element along a cutting line predetermined by the cutting plane (7) through the profile element.The separating device (3) has a shear plate displacement device with which the trajectory (24) of the two shear plates (1, 2) which can be displaced relative to one another can be predetermined in such a way that the trajectory (24) has at least one shearing section in which the two cutting edges shear off the profile element over at least one parting line section, wherein in the shearing section the trajectory (24) has a first trajectory direction in a first trajectory point (25) which has a trajectory angle (27) of more than 5°, preferably of more than 15° and particularly preferably of more than 30° to one another with respect to a second trajectory direction in at least one second trajectory point (26) spaced from the first trajectory point.