Vibration Cutting Insert Geometry for Chip Flow Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cutting inserts can cause chips to become caught between the tool and the workpiece during machining, leading to inefficiencies and potential damage.
Innovation Solution
A vibration cutting insert with a cylindrical rake face and a flat breaker face is designed, where the rake angle is between 23° and 35°, and the angle between the breaker face and the bottom surface is between 30° and 50°, to control chip flow away from the workpiece, preventing chip entrapment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional cutting insert design is used, then the cutting insert can perform basic cutting operations, but chips become caught between the cutting insert and the workpiece
Solution Approach 1:
The rake face is designed as a cylindrical surface with a specific radius of curvature, creating a curved chip flow path that directs chips away from the workpiece. This curvature prevents chip entrapment by guiding chips along a controlled trajectory during the cutting operation.
Solution Approach 2:
Different regions of the cutting insert are given different geometric properties: the rake face has a cylindrical curvature to control chip flow, while the breaker face has a specific flat angle to further direct chips. Each surface is optimized locally to achieve the overall goal of preventing chip entrapment.
2Ease of operation
If the rake angle is increased to improve chip flow, then chip evacuation is enhanced, but the cutting edge biting property deteriorates
Solution Approach 1:
The rake angle is optimized within a specific range (23° to 35°) to balance chip evacuation and cutting edge biting properties. This parameter optimization ensures that chips can flow away effectively while the cutting edge maintains sufficient engagement with the workpiece for reliable cutting.
3Object-affected harmful factors
If the breaker face angle is increased to direct chips away from the workpiece, then chip entrapment is reduced, but cutting resistance increases
Solution Approach 1:
The breaker face angle is optimized within a specific range (30° to 50°) to achieve the right balance between directing chips away from the workpiece and maintaining acceptable cutting resistance. This angular optimization prevents chip entrapment while avoiding excessive force requirements.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A vibration cutting insert includes a top surface having a rake face and a breaker face, a first side surface, a second side surface, and a bottom surface. In a cross section which includes a bisector of an angle formed between a first ridgeline and a second ridgeline when viewed in a direction from the top surface toward the bottom surface, and which is parallel to the direction from the top surface toward the bottom surface, a rake angle formed between the rake face and a plane parallel to the bottom surface has a positive angle. The angle formed between the first ridgeline and the second ridgeline is an acute angle. The rake face constitutes a cylindrical surface. The breaker face constitutes a flat surface.