Face Mill Cartridge Clamping Against Centrifugal Shift
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Solution Overview
Problem
Existing face mills experience misalignment of cartridges due to centrifugal force during rotation, which affects the precision and stability of cutting operations.
Innovation Solution
A face mill design that incorporates a cutter body with accommodation holes for cartridges, featuring through holes and a fastener system with threaded holes, secured by affixation bolts to prevent cartridge misalignment by interposing the cartridge between the cutter body and fastener, ensuring stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cartridge is indirectly affixed to the cutter body by a sleeve, then the structure is simpler, but the position of the cartridge shifts when large load is applied
Solution Approach 1:
The affixation system is segmented into multiple independent components: the cutter body with accommodation hole, the cartridge with cutting edge, the fastener with threaded hole, and the affixation bolt. This segmentation allows each component to perform its specific function - the bolt provides direct mechanical fastening while the fastener provides radial clamping force, together ensuring cartridge position stability without requiring a complex integrated structure.
Solution Approach 2:
The affixation mechanism transitions from single-dimensional indirect affixation (sleeve-based) to multi-dimensional direct affixation. The affixation bolt acts in the axial direction to secure the cartridge, while the fastener acts in the radial direction to clamp the cartridge against the cutter body. This multi-dimensional approach provides superior position stability compared to the single-dimensional indirect sleeve affixation.
2Device complexity
If a wedge-like fastener is used to affix the cartridge, then the fastening mechanism is simpler, but the cartridge position shifts when centrifugal force is exerted during rotation
Solution Approach 1:
The affixation bolt provides a counteracting force to balance the centrifugal force acting on the cartridge during rotation. By securing the cartridge directly to the cutter body through the accommodation hole, the bolt creates a rigid connection that resists the outward centrifugal force, preventing the cartridge from shifting radially during high-speed operation.
Solution Approach 2:
The fastener acts as an intermediary component between the cartridge and the cutter body. It is inserted into the accommodation hole alongside the cartridge and provides radial clamping force through its threaded hole engagement with the affixation bolt. This intermediary fastener enhances the reliability of cartridge affixation under centrifugal force while maintaining relatively simple fastening mechanism complexity.
3Reliability
If the cartridge is directly affixed between the cutter body and fastener, then the cartridge position stability improves, but the device complexity increases
Solution Approach 1:
The affixation system merges multiple functions into a coordinated mechanism: the accommodation hole provides both cartridge insertion and fastener reception; the affixation bolt provides both axial securing and radial clamping through its engagement with the fastener's threaded hole; and the fastener provides both structural support and radial clamping force. This merging of functions achieves superior cartridge position stability while keeping the overall affixation system relatively simple through functional integration rather than adding separate complex components.
Data Source
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AI summary
A face mill comprising: a cutter body (110) having accommodation holes (114) that open in the direction of a rotation axis O, and first through holes (118a, 118b) that are substantially perpendicular to the rotation axis and penetrate into the corresponding accommodation holes from the outer periphery; cartridges (10) that are inserted into accommodation holes, each cartridge having second through holes (12a, 12b) and having fixed thereto a cutting tip (16) having a cutting edge (16b); fixing tools (20), each of which is inserted into the accommodation hole, disposed on the inner side with respect to the rotation axis relative to the cartridge, and has formed therein a screw hole that extends in a radial direction with respect to the rotation axis; and fixing bolts (120), each of which is inserted into the first through hole from the outer periphery of the cutter body, passes through the second through hole and is screwed into the screw hole of the fixing tool, thereby sandwiching and fixing the cartridge between the outer periphery of the cutter body and the fixing tool.