Cutting Tool Teeth Asymmetry for Flat Material Surfaces
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Solution Overview
Problem
Existing cutting tools for flat materials like cardboard and plastic often deform the surface layer during cutting, resulting in uneven cut surfaces, which can affect the appearance and mechanical molding of packaging blanks.
Innovation Solution
The cutting teeth are designed with tips having radii of up to 2.0 mm and cutting flanks at an angle of 60° to 90°, with varying distances from the support surface to minimize penetration depth and prevent deformation, allowing for flat cut surfaces and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cutting teeth have sharp tips with small radius, then penetration into material is easier, but tips deform the surface layer causing uneven cut surfaces
Solution Approach 1:
The cutting tool is segmented into multiple cutting teeth with different tip positions, where each tooth has a specific distance from the support surface. This segmentation allows the tool to interact with the material in discrete stages, with spaced tips preventing simultaneous deformation while maintaining effective cutting action.
Solution Approach 2:
The cutting teeth are designed with asymmetric positioning relative to the support surface, with deliberately varied distances between tips and support surface. This asymmetric arrangement ensures that tips do not align at the same depth, preventing synchronized surface deformation while maintaining cutting effectiveness through the angled flanks.
2Productivity
If cutting teeth are positioned close together, then cutting speed increases, but local compressive load deforms the material surface
Solution Approach 1:
Different regions of the cutting tool have different tooth configurations. The cutting teeth are designed with specific local characteristics including varied distances from the support surface, allowing each local region to optimize between penetration effectiveness and surface deformation prevention based on its position and function.
3Force
If cutting flanks are positioned at small angles, then cutting force is reduced, but cut surface flatness deteriorates
Solution Approach 1:
The cutting flanks are designed with specific angular parameters (60° to 90°) that optimize the balance between cutting force and surface quality. This parameter optimization ensures that the flanks are sufficiently angled to reduce cutting force requirements while maintaining the geometric precision needed for flat cut surfaces.
Data Source
Figure 1~3
AI summary
The invention relates to a cutting tool (S) made of hardenable steel for cutting flat materials, for example cardboard, corrugated board, honeycomb cardboard, plastic sheets and the like, consisting of a band-shaped base body which, in the longitudinal direction, has on one side a working area (1) with cutting teeth (11) and on the other side a support area (2) with a support surface (22), optionally with a plurality of support surfaces (22, 22'). In order to create flat cut surfaces in cross-section when cutting flat materials and to minimize the penetration depth of the tips of the cutting tool into the yielding support of the planar material, the invention provides that the cutting teeth (11) have tips (111) with radii up to 2.0 mm and from these are formed with cutting flanks (112,112',112") with an angle α of 60° to 90° to each other, wherein in the longitudinal direction of the cutting tool (S) adjacent cutting teeth (11,11') have a different distance (A,A') of the cutting tips (111, 111', 111") from the opposite support surface(s) (22, 22').