Single-Surface Insert with Inclined Cutting Edges
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Solution Overview
Problem
Conventional double-sided inserts with limited thickness face challenges in achieving sufficient inclination angles for cutting edges, leading to reduced cutting efficiency and compromised coupling characteristics when attempting to increase thickness or reduce cutting edge length.
Innovation Solution
An insert design featuring a main cutting edge between the upper and side surfaces with a sub cutting edge, forming different clearance angles and an inclined surface, allowing for increased inclination angles without thickness increase, along with a tool holder that matches these surface configurations for enhanced coupling and reduced interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the thickness of the insert is increased to achieve sufficient inclination angle for main cutting edges, then the inclination angle is improved, but the fabrication difficulty of tool holder increases and coupling characteristic deteriorates
Solution Approach 1:
The patent transitions from a dual-surface configuration to a single-surface configuration with extended lateral dimensions. By arranging multiple cutting edges (main and sub cutting edges) on one surface at different positions along the side surfaces, the insert achieves sufficient inclination angles without increasing thickness, thereby avoiding tool holder fabrication difficulties while maintaining coupling characteristics.
2Shape
If the main cutting edge is fabricated to be approximately half the size of one side surface, then the inclination angle is improved, but the cutting depth decreases and cutting efficiency deteriorates
Solution Approach 1:
The patent divides the cutting function into multiple segments: a main cutting edge for primary cutting and sub cutting edges for additional cutting capacity. This segmentation allows the main cutting edge to have optimal inclination angle without being constrained to half the side surface size, as the sub cutting edges compensate for reduced individual edge size, thereby maintaining cutting efficiency while achieving proper inclination angles.
Solution Approach 2:
The patent extends the cutting functionality laterally along the side surfaces by positioning sub cutting edges at different locations, effectively utilizing the lateral dimension to compensate for reduced main cutting edge size. This allows the main cutting edge to achieve sufficient inclination angle without compromising overall cutting depth and efficiency.
3Adaptability or versatility
If the insert uses both upper and lower surfaces for cutting (dual-sided), then the versatility is improved, but the thickness is limited and coupling characteristic deteriorates
Solution Approach 1:
Instead of utilizing both upper and lower surfaces for cutting (dual-sided approach), the patent inverts the approach by concentrating multiple cutting edges on a single surface. This single-sided configuration with extended lateral arrangement of main and sub cutting edges eliminates thickness limitations and improves coupling characteristics while maintaining versatility through multiple cutting edges.
Data Source
AI summary
Provided is an insert for being mounted on a tool holder. The insert includes three substantially right-angled corners along a perimeter, a main cutting edge, a sub cutting edge, and a flat lower surface. A clearance angle of a second end main side surface forms an obtuse angle with respect to a lower surface, and a clearance angle of a second end sub side surface forms an obtuse angle with respect to the lower surface. A clearance angle of a first end main side surface forms a right angle with respect to the lower surface, and a clearance angle of a first end sub side surface forms a right angle with respect to the lower surface.