Multi-Insert Cutting Tool Groove Layout for Swarf Discharge
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Solution Overview
Problem
Existing cutting tools face issues with swarf clogging due to inadequate swarf discharging performance, leading to reduced machining accuracy and increased cutting resistance.
Innovation Solution
The cutting tool design features a body with strategically positioned pockets and swarf discharging grooves, including an angle greater than 90° between the outer circumferential surface and the tangent of the swarf discharging groove, along with an equally divided arrangement of cutting edges to minimize overlap and enhance swarf discharge, reducing clogging and cutting resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cutting tools are used with standard groove designs, then the structure is simple and easy to manufacture, but swarf clogs the groove leading to poor swarf discharging performance
Solution Approach 1:
The groove structure is segmented into multiple functional zones: a first groove portion extending axially from the front end surface, and a second groove portion extending radially from the outer circumferential surface. These segments work together to create separate pathways for swarf discharge, preventing clogging while maintaining manufacturing feasibility through standard machining operations.
Solution Approach 2:
The invention transitions from a conventional single-plane groove design to a three-dimensional groove system that utilizes both axial and radial dimensions. The first groove portion operates in the axial direction while the second groove portion operates in the radial direction, creating a multi-dimensional swarf discharge pathway that significantly improves discharge performance without excessive complexity.
2Productivity
If cutting edges are arranged with overlap to increase cutting resistance, then more cutting edges can be accommodated on the tool, but tool vibration increases reducing work surface accuracy
Solution Approach 1:
The cutting edges are arranged in a helical configuration rather than being statically positioned in straight rows. This dynamic arrangement allows the cutting edges to engage the workpiece in a progressive, staggered sequence that reduces simultaneous overlap and vibration, while still accommodating multiple cutting edges on the tool body for maintained productivity.
Data Source
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AI summary
A cutting tool includes a body, a first cutting insert, a second cutting insert, and a third cutting insert. The body has a front end surface and an outer circumferential surface. The first cutting insert is attached to a first pocket. The second cutting insert is attached to a second pocket. The third cutting insert is attached to a third pocket. The first pocket has a first seat surface, a second seat surface, a third seat surface, and a first swarf discharging groove. The second pocket has a fourth seat surface, a fifth seat surface, a sixth seat surface, and a second swarf discharging groove. The third pocket has a seventh seat surface, an eighth seat surface, a ninth seat surface, and a third swarf discharging groove. In a cross section perpendicular to an axis, an angle formed between a straight line along the sixth seat surface and a tangent of the second swarf discharging groove at a boundary between the outer circumferential surface and the second swarf discharging groove is more than 90°.