Rotary Cutting Insert Geometry for High-Speed Milling Accuracy
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Solution Overview
Problem
Existing rotary tools for milling processing face challenges in maintaining machining accuracy and durability due to inadequate design of cutting inserts, which leads to displacement and damage under high rotation speeds and machining loads.
Innovation Solution
The cutting insert features a base portion with specific surface regions and a cutting portion designed for secure attachment and efficient machining, including a base with recesses and a cutting edge configuration that enhances durability and reduces displacement, allowing for high-speed machining with improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cutting insert uses a conventional base portion design, then the structure is simple, but the durability and resistance to displacement under high rotation speeds and machining loads are insufficient
Solution Approach 1:
The base portion is divided into multiple surface regions (first rear surface, first front surface, first end surface, second rear surface, second front surface, second end surface) with distinct functions. The cutting portion is separately designed and bonded to the base portion, creating a segmented structure that improves durability while maintaining manufacturing feasibility.
Solution Approach 2:
The patent introduces a multi-dimensional surface configuration with regions extending in radial, axial, and rotational directions. The first and second regions of the base portion create a three-dimensional structure that distributes machining loads across multiple surfaces, enhancing durability without excessive complexity.
2Productivity
If the cutting insert is designed for high-speed machining, then productivity increases, but machining accuracy decreases due to displacement and damage
Solution Approach 1:
The cutting insert is pre-designed with a robust multi-surface base portion structure before machining operations begin. The base portion includes reinforced regions and proper bonding surfaces that prepare the insert to withstand high-speed machining forces, preventing displacement and maintaining accuracy during operation.
Solution Approach 2:
The patent optimizes geometric parameters of the base portion surfaces, including the arrangement and orientation of the first and second regions. These parameter changes enhance the structural integrity and load distribution, allowing the insert to maintain machining accuracy even at high rotation speeds.
3Reliability
If the cutting portion is securely attached to the base portion, then durability improves, but the complexity of attachment structure increases
Solution Approach 1:
The cutting portion is bonded to the base portion through a unified bonding process that integrates multiple surfaces (first front surface, second rear surface, etc.) into a single secure attachment system. This merging approach provides strong attachment without requiring multiple separate fastening mechanisms, maintaining structural simplicity.
Solution Approach 2:
The cutting insert combines different materials or material properties in the base portion and cutting portion, with the bonding interface designed to optimize the union between them. This composite structure enhances attachment strength while keeping the overall design manageable.
Data Source
AI summary
A cutting insert of a rotary tool includes a base portion and a cutting portion. The base portion includes a first rear surface and a first end surface having a first region and second region. The cutting portion includes a second front surface and a second rear surface. The first region is located rearward of the second rear surface and to an outer side. The second region is located rearward of the second front surface and to an inner side. A virtual plane including the second rear surface is a reference plane. The first region includes a portion in which a width of a region interposed between the reference plane and the first rear surface increases toward the outer side, and the second region includes a portion in which a width of a region interposed between the reference plane and the first rear surface increases toward the inner side.