Profile Cutting Head Geometry for Accurate Non-Circular Cuts
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Solution Overview
Problem
Existing cutting devices are inefficient in cutting profile parts with non-circular contours, as they lack flexibility in support and contact surfaces, leading to suboptimal cutting surfaces and potential inaccuracies due to workpiece elasticity.
Innovation Solution
The cutting device features engagement projections on contact surfaces with a semicircular contour and circular arc sections, allowing for precise alignment and cutting of non-circular workpieces, with a support surface that corrects for non-uniformities by forming an acute angle with the cutting plane, ensuring a favorable cutting surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cutting devices with continuous circular support surfaces are used, then circular workpieces can be cut effectively, but non-circular profile parts cannot be cut with precision
Solution Approach 1:
The continuous circular support surface is segmented into discrete engagement projections with specific foot circumferential angle ranges (20-90 degrees). These segmented projections can be selectively engaged with different portions of non-circular workpiece contours, enabling precise support for various profile shapes while maintaining cutting accuracy.
Solution Approach 2:
The support surface transitions from a uniform continuous circular shape to a non-uniform distribution of engagement projections with varying foot circumferential angle ranges. This local variation in support geometry allows different regions of the support surface to adapt to specific portions of non-circular workpiece contours, providing localized precision support.
2Ease of operation
If the workpiece is held horizontally during cutting, then the cutting process is simple, but elasticity of the workpiece causes non-uniformities and inaccurate cutting surfaces
Solution Approach 1:
The engagement projections are pre-configured with specific foot circumferential angle ranges (20-90 degrees) and projection depths (1/5 to 9/10 of radius) to automatically establish the correct inclined holding position. This preliminary geometric configuration ensures that when the workpiece is inserted, it is automatically positioned at the optimal angle for cutting, eliminating the need for complex adjustment procedures.
3Measurement precision
If engagement projections with large foot circumferential angle ranges are used, then workpiece alignment is improved, but the support surface complexity increases
Solution Approach 1:
The foot circumferential angle range of the engagement projections is optimized within the 20-90 degree range, and the projection depth is set between 1/5 to 9/10 of the radius. These specific parameter ranges provide sufficient alignment accuracy while avoiding excessive geometric complexity that would result from larger angle ranges or deeper projections.
Data Source
Figure 1
Figure 1a
Figure 2
AI summary
Cutting device (1) comprising a retaining head (2) and cutting tools (3, 4) which are arranged in the retaining head (2), can be moved relative to each other along a cutting plane (S), are arranged in the retaining head (2) in such a way that the cutting tools can be removed, are offset from one another transverse to the cutting plane (S) and can be moved past each other, and form cutting edges (7, 8) on edges of the end faces (10, 11) of the cutting tools that face each other and are opposite each other in the direction of travel (R). Furthermore, one cutting tool (3, 4) has a supporting part (14) that is laterally offset from the cutting plane (S) and forms a supporting surface (15) which has an opening in a direction opposite a recess (12, 13). The supporting part (14) is formed on the stationary cutting tool (3), and both contact surfaces (18, 19) are designed with engagement projections (20, 21) which are directed toward each other and project into the interior of a contour of the contact surfaces (18, 19) that is substantially semicircular and extends in the cutting direction everywhere else.