Disc Milling Cutter Assembly for Precise Centering and Cooling
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Solution Overview
Problem
Existing disc-shaped milling cutters face challenges in achieving accurate centering and holding, efficient cooling, and manufacturing complexity due to intricate coolant channel designs and thin thickness, which affect tool lifetime and milling accuracy.
Innovation Solution
A milling cutter design comprising two parts, a front end part with a disc-shaped cutter body and a back end part, featuring a primary and secondary holding member interface for secure centering, and liquid channels extending outwardly for efficient cooling without the need for seals, allowing for easier manufacturing and improved torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a disc-shaped cutter body with thin thickness is used, then the milling operation can be performed, but accurate centering and holding of the cutter body becomes difficult to achieve
Solution Approach 1:
The holding structure is divided into multiple components: a holding member with an engagement portion for the cutter body, a fastening member for securing the engagement portion, and a centering member with a centering portion. This segmentation allows each component to perform its specific function independently, achieving accurate centering and secure holding without requiring a complex monolithic structure.
Solution Approach 2:
The centering member acts as an intermediary element between the holding member and the cutter body. Its centering portion protrudes into the cutter body to provide precise axial and radial positioning, while the holding member's engagement portion receives the cutter body. This intermediary structure enables accurate centering without directly complicating the main holding mechanism.
2Temperature
If coolant channels are provided in a thin disc-shaped cutter body, then cooling of cutting inserts can be achieved, but the channels cannot extend straight and require changes of direction
Solution Approach 1:
The coolant channels extend primarily in the axial dimension (perpendicular to the disc face) rather than requiring complex in-plane routing. The channels penetrate through the thickness of the cutter body from the front face to the rear face, allowing straightforward coolant delivery to cutting inserts located on the periphery without requiring multiple bends or changes of direction within the thin disc plane.
3Ease of operation
If insert seats extend through the rear side of the disc-shaped cutter body, then cutting inserts can be accessed and changed, but manufacturing becomes more complicated
Solution Approach 1:
The insert seats are designed as separate recesses formed only in the front face of the cutter body, not extending through to the rear side. The holding member and fastening member are separate components that can be manufactured independently and assembled together. This segmentation simplifies manufacturing of each individual component while maintaining the ability to access and change inserts from the front side.
4Manufacturing precision
If a single-piece disc-shaped cutter body is used, then manufacturing may be simpler, but accurate centering and rigid holding cannot be achieved
Solution Approach 1:
The cutter assembly is segmented into the cutter body, holding member, fastening member, and centering member. This segmentation allows the centering member to be specifically designed with precision centering features that would be difficult to integrate into a single-piece design, while the total number of parts remains manageable through functional grouping.
Solution Approach 2:
The centering member serves as an intermediary component that mediates between the holding member and the cutter body to achieve precise alignment. This intermediary element provides the necessary centering functionality without requiring the main holding structure to be overly complex, as the centering function is specialized and isolated in a dedicated component.
Data Source
AI summary
A milling cutter includes a front end part and a back end part. The front end part includes a disc-shaped cutter body having a front side, a rear side, a central axis, and a number of insert seats. A primary holding member extends from the rear side. The back end part includes a secondary holding member, which engages the primary holding member when the front and back end parts are mounted to each other. The disc-shaped cutter body has a central cylindrical aperture extending coaxially with the central axis and including an inner cylindrical surface. An outer cylindrical surface is provided on a front portion of the secondary holding member. The inner cylindrical surface abuts the outer cylindrical surface in an abutting region between the front and the rear sides to center the front and back end parts.