Double-Sided Tangential Milling Insert With Anti-Rotation Support Surface
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing double-sided tangential milling cutting inserts face issues with rotation and centrifugal forces during high-speed machining, leading to potential damage and compromised chip evacuation due to improper orientation and mounting, especially in tangential milling tools.
Innovation Solution
The design incorporates a planar support surface forming acute angles with reference planes and symmetrical axes, along with positive locking mechanisms in the insert seat, to prevent rotation and stabilize the insert, ensuring secure mounting and effective chip evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the milling cutting insert is mounted with strong axial and radial tilting to prevent rotation, then the insert becomes stable and resistant to centrifugal forces, but the chip-evacuation performance deteriorates
Solution Approach 1:
The support surface is designed to come closer to the first symmetry plane with increasing distance from the second symmetry plane, creating a three-dimensional angular relationship (acute angle α) between the support surface and the first symmetry plane. This dimensional approach allows the insert to be stabilized against rotation without requiring strong radial tilting, thereby maintaining chip evacuation performance.
2Reliability
If the milling cutting insert is mounted with strong radial tilting to prevent rotation, then the insert becomes stable and resistant to centrifugal forces, but other cutting edge sections become damaged
Solution Approach 1:
The support surface is designed to come closer to the first symmetry plane with increasing distance from the second symmetry plane, creating a three-dimensional angular relationship (acute angle α) between the support surface and the first symmetry plane. This dimensional approach allows the insert to be stabilized against rotation without requiring strong radial tilting, thereby protecting other cutting edge sections from damage.
3Strength
If the insert is secured with a fastening screw through a through-hole, then the insert is firmly mounted, but the insert may rotate about the through-hole axis due to high cutting forces
Solution Approach 1:
The support surface is designed with an asymmetric angular orientation relative to the symmetry planes of the insert. The support surface comes closer to the first symmetry plane with increasing distance from the second symmetry plane, forming an acute angle α. This asymmetric geometry prevents rotation about the through-hole axis by creating a geometric constraint that opposes rotational movement caused by high cutting forces.
4Ease of manufacture
If the support surface is made planar, then the construction becomes robust against tolerances, but the ability to prevent rotation must rely entirely on the angular orientation
Solution Approach 1:
The planar support surface is oriented at an acute angle α to the first symmetry plane, creating a three-dimensional geometric constraint. This angular orientation in a different dimension provides rotation prevention capability while maintaining the simplicity and tolerance robustness of a planar surface. The acute angle relationship ensures that even with manufacturing tolerances, the support surface effectively prevents rotation.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A double-sided tangential milling cutting insert (1) for corner milling, comprises: a first end surface (2), an opposed second end surface (3), two main side surfaces (4), two secondary side surfaces (6), and a through-hole (10) penetrating the two main side surfaces (4). The first and second end surfaces (2, 3) each have two diagonally opposed raised corners (8) and two diagonally opposed lowered corners (9). The cutting insert (1) has a first symmetry plane (SP12) and a reference plane (RP) dividing the cutting insert into two halves. First to fourth cutting edge sections (11a, 11b, 11c, 11d) each having a main cutting edge (12), a raised corner (8) and a wiper edge (13) are formed at intersections of the first and second end surfaces (2, 3) with the main side surfaces (4) and secondary side surfaces (6). A transitional edge portion (14), connecting the wiper edge (13) to an adjacent lowered corner (9), is formed along the secondary side surface (6). Adjacent to the transitional edge portion (14) the secondary side surface (6) has a support surface (15) which comes closer to a first symmetry plane (SP12) with increasing distance from a reference plane (RP).