Chipping Tool Radial Cutting Projections Axial Offset
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Solution Overview
Problem
Existing cutting tools for formatting wood-like materials, such as chipboard, are prone to wear and tear, leading to reduced cutting quality and service life due to sensitivity to impacts and foreign bodies, resulting in incomplete cuts and defects.
Innovation Solution
A cutting tool design featuring multiple radially arranged cutting projections with an axial offset, where the radially inner projections support the outer ones, ensuring staggered wear and maintaining sharpness, with inclined cutting edges and chamfers to reduce impact sensitivity and enhance cutting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a single cutting projection is used at the corner area between peripheral and front cutting edges, then clean cutting is achieved initially, but the cutting edge becomes sensitive to impact and foreign bodies, leading to spalling and reduced service life
Solution Approach 1:
The single cutting projection is segmented into multiple cutting projections (first, second, and third cutting projections) arranged radially. This segmentation distributes the cutting function across multiple elements, reducing the sensitivity to impact and foreign bodies while maintaining clean cutting capability.
Solution Approach 2:
Different cutting projections are positioned at different radial locations with specific axial offsets. The radially outer cutting projections engage the workpiece first, while radially inner projections provide support and backup cutting action. This local differentiation of cutting projection positions and functions enhances both cutting quality and reliability.
2Manufacturing precision
If cutting projections are positioned to maximize initial cutting performance, then clean cuts are achieved, but wear occurs rapidly at these critical corner areas, leading to cracks and defects
Solution Approach 1:
The cutting projections are pre-positioned with axial offsets so that radially outer projections engage the workpiece first during operation. This preliminary engagement pattern ensures that wear occurs progressively from outer to inner projections, preserving sharp cutting edges longer and extending tool service life.
Solution Approach 2:
Multiple cutting projections are arranged radially with axial offsets to provide backup cutting action. When outer cutting projections wear or become damaged, inner projections remain sharp and continue to provide clean cutting, cushioning against the loss of cutting performance and extending usable tool life.
3Duration of action of stationary object
If cutting corners are rounded and blunted by wear, then the tool continues to operate, but clean cutting is no longer achieved, resulting in cracks and defects
Solution Approach 1:
The cutting function is segmented across multiple radially arranged projections with different axial positions. This segmentation ensures that when some projections wear and become rounded, other projections remain sharp and maintain clean cutting capability throughout the tool's operational life.
Data Source
Figure 1~2
Figure 2
Figure 3~4
AI summary
The tool has a base body (3) rotatably driven around a rotational axis and arranged in a circumferential region (4) of cutting teeth (5). The cutting teeth include a circumferential cutting region (6) and protrude on the circumferential cutting region adjacent to a cutting projection (7) relative to the rotational axis in an axial direction over the base body. The cutting teeth are radially arranged within the cutting projection, and another set of cutting projections (8, 9) is projected in the axial direction over the base body.