Cutting Insert with Non-Linear Edges for Heavy Machining
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Solution Overview
Problem
Conventional tool holders fail to securely hold cutting inserts during sudden load transitions in cutting operations, leading to positional shifts and inaccuracies in cutting, especially in Numerically Controlled machines, due to the inability to manage extreme pressure loads effectively.
Innovation Solution
A cutting insert design with specific geometric features, including non-linear major cutting edges and shim abutment surfaces, is used in conjunction with a shim to provide precise seating and additional support within the milling cutter's insert pockets, ensuring stable engagement and reduced rotation during heavy-duty machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional tool holder is used to hold the cutting insert, then the insert can be easily installed and removed, but the insert shifts position during sudden load transitions causing cutting inaccuracies
Solution Approach 1:
The insert pocket is pre-configured with raised members and lowered abutment members that automatically engage with corresponding features on the cutting insert during installation. This preliminary configuration ensures that when the insert is seated, it is immediately positioned with high precision and locked in place, preventing any position shifts during load transitions while maintaining ease of installation through a simple seating motion
Solution Approach 2:
A shim is introduced as an intermediary element between the cutting insert and the insert pocket. The shim features a non-planar upper surface with valleys and ridges that mate with corresponding raised members and abutment members on the insert. This intermediary component facilitates precise positioning and secure holding of the insert during installation and operation, resolving the contradiction between ease of installation and cutting accuracy
2Manufacturing precision
If the cutting insert is firmly held in the holder to prevent shifting, then cutting accuracy is maintained, but the insert pocket and holder may be damaged under extreme loads up to 35,000 pounds
Solution Approach 1:
The insert pocket is pre-configured with raised members and lowered abutment members that automatically engage with corresponding features on the cutting insert during installation. This preliminary configuration ensures that when the insert is seated, it is immediately positioned with high precision and locked in place, preventing any position shifts during load transitions while maintaining ease of installation through a simple seating motion
Solution Approach 2:
A shim is introduced as an intermediary element between the cutting insert and the insert pocket. The shim features a non-planar upper surface with valleys and ridges that mate with corresponding raised members and abutment members on the insert. This intermediary component facilitates precise positioning and secure holding of the insert during installation and operation, resolving the contradiction between ease of installation and cutting accuracy
Data Source
AI summary
A cutting insert for heavy machining operations is described. The cutting insert has two opposing end surfaces, two identical opposing major side surfaces and two identical opposing minor side surfaces. The cutting insert further includes a major cutting edge formed at an intersection of each major edge and the end surface, and a minor cutting edge formed at an intersection of each minor edge and the end surface, and a corner cutting edge formed at an intersection of the major and minor cutting edges. The major cutting edge has a non-linear, variable slope with respect to a central axis A2 passing through the two minor side surfaces of the cutting insert.