Beveling Tool Relief Angles Prevent Chatter
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Solution Overview
Problem
Existing beveling tools experience chatter and edge imperfections due to direct contact between the work piece and cutter, leading to tool wear and damage.
Innovation Solution
A beveling tool with a body featuring multiple cutter blades arranged at specific relief angles and discharge grooves, where the radial primary and secondary relief angles range from 10 to 20 degrees and 25 to 35 degrees respectively, reducing load and preventing chatter, and honed portions on the blades prevent breakage and improve surface finish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutter directly contacts the work piece during beveling, then the machining function is achieved, but the spindle chatters and the edge finish becomes imperfect
Solution Approach 1:
The patent changes the geometric parameters of the cutter blades by introducing specific relief angles (primary relief angle of 10-20 degrees and secondary relief angle of 25-35 degrees). These parameter modifications create a gap between the blade and work piece during operation, preventing direct contact and eliminating chatter while maintaining effective cutting action.
2Reliability
If the cutter blades have no relief angle, then the cutting edge is strong, but the work piece and cutter contact causing chattering and tool wear
Solution Approach 1:
The patent introduces optimized relief angle parameters (primary: 10-20 degrees, secondary: 25-35 degrees) that balance blade strength with chatter prevention. The honed portions on the cutting edges further refine the geometry to maintain strength while enabling the gap formation necessary for smooth operation and extended tool life.
Solution Approach 2:
The patent applies honing to the cutting edges, creating a curved or rounded surface rather than a sharp edge. This curvature distributes stress more evenly and prevents direct point contact with the work piece, reducing chatter and tool wear while maintaining cutting effectiveness.
3Reliability
If the relief angle is increased to prevent chatter, then the gap between cutter and work piece increases, but the cutting effectiveness may be reduced
Solution Approach 1:
The patent optimizes the relief angle parameters within specific ranges (primary: 10-20 degrees, secondary: 25-35 degrees) to achieve the right balance. These carefully selected parameters create sufficient gap to prevent chatter while maintaining adequate cutting edge engagement with the work piece for effective material removal.
Solution Approach 2:
The cutter blade is divided into functional segments: the primary relief angle portion that creates the main gap, the secondary relief angle portion that provides additional clearance, and the honed cutting edge that maintains strength. This segmentation allows each portion to perform its specific function optimally.
Data Source
AI summary
The present invention provides a beveling tool including: a body with a shaft hole formed through the center; a plurality of cutter blades arranged at predetermined distances on the circumferential surface of the body, each having a radial primary blade with a radial primary relief angle ranging from about 10 to about 20 degrees and a radial secondary blade with a radial secondary relief angle ranging from about 25 to about 35 degrees (or about 35 to about 45 degrees); discharge grooves formed longitudinally between the cutter blades to discharge chips produced in beveling; and a shank inserted in the shaft hole of the body, in which the body and the shank are connected by brazing. With the beveling tool of the present invention, it is possible to smoothly discharge chips produced in beveling and to prevent damage to the cutter blades.