Slit Cutting Tool Geometry to Prevent Crossed Line Patterns
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Solution Overview
Problem
Existing milling tools face challenges in avoiding crossed line patterns on machined surfaces, particularly in multi-axis machining centers, due to limitations in tool design and versatility.
Innovation Solution
The cutting tool features a main body with a pocket containing a cutting part with a unique slit design on the front end surface, which opens into the outer and inner lateral surfaces and is inclined to avoid contact with the workpiece on the rear side, thereby preventing crossed line patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotation axis is tilted toward the front side in the feed direction, then the risk of causing crossed line pattern is reduced, but the versatility for multi-axis machining is reduced
Solution Approach 1:
The cutting part is designed with asymmetric geometry where the front lateral surface is positioned lower than the rear lateral surface in the rotation direction. This asymmetric configuration prevents the cutting part from contacting the workpiece on the rear side during machining, eliminating the crossed line pattern while maintaining a straight rotation axis for multi-axis versatility.
Solution Approach 2:
The cutting part has different surface heights at different locations along the rotation direction. The front lateral surface is locally positioned lower to prevent contact with the workpiece, while the rear lateral surface maintains its original position. This localized geometric modification solves the crossed line pattern problem without affecting the overall tool structure or rotation axis orientation.
Data Source
AI summary
A cutting tool has a main body and a cutting part. The main body extends from a front end toward a rear end along a rotation axis, and has a pocket located on a side of the front end. The cutting part is located in the pocket. The cutting part has a front end surface, a front lateral surface, an outer lateral surface, an inner lateral surface located on a side opposite to the outer lateral surface, and a cutting edge. The front end surface has a slit which is located on a rear side and extends toward the rear end. The slit opens into the outer lateral surface and the inner lateral surface, and is inclined so as to be separated from the front lateral surface as getting closer to the rear end.