Bell-Shaped Cutter With Modular Positioning For Curved Grooves
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Solution Overview
Problem
The production of arcuate grooves in turbine hubs using traditional bell milling cutters is complex and expensive due to the need for precise alignment and arrangement of cutting inserts, which requires multiple work steps and specialized machinery, limiting productivity and increasing costs.
Innovation Solution
A bell cutter design featuring sector-shaped positioning modules with axial and radial flank surfaces, allowing for precise radial positioning of cutter holders and interchangeable jaws, enabling the use of a single base body for producing grooves with varying arc radii, reducing tooling costs and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional bell milling cutters with cylindrical shell design are used, then cutting inserts can be arranged to produce arc-shaped grooves, but the alignment and arrangement of cutting inserts becomes complex and expensive, requiring multiple work steps and specialized machinery
Solution Approach 1:
The cylindrical shell is divided into several separate cutting insert carriers arranged one behind the other along a circular path around the center of the base body. Each carrier is independently detachable, allowing separate positioning and adjustment. This segmentation simplifies the overall alignment process by breaking down the complex cylindrical structure into manageable modular components that can be independently configured.
Solution Approach 2:
The base body is designed with a universal structure that can accommodate multiple cutting insert carriers in different configurations. The base body serves multiple functions: supporting the carriers, providing a reference circular path for positioning, and enabling the production of grooves with different arc radii by rearranging carriers. This multi-functionality reduces the need for specialized machinery for each specific groove configuration.
2Manufacturing precision
If specialized machinery and multiple work steps are used for precise alignment of cutting inserts, then manufacturing precision is improved, but productivity decreases and costs increase
Solution Approach 1:
The cutting insert carriers are pre-positioned on the base body along a predetermined circular path during assembly, establishing reference positions before actual groove production. This preliminary arrangement of carriers in their correct spatial relationships eliminates the need for complex alignment operations during each work step, allowing direct machining with high precision while maintaining productivity.
3Adaptability or versatility
If a single base body is used for multiple arc radii, then tooling costs are reduced, but the positioning accuracy for different arc radii becomes more challenging
Solution Approach 1:
The cutting insert carriers are designed to be independently detachable and repositionable on the base body. This dynamic configuration allows the carriers to be moved to different radial positions around the base body center to accommodate grooves with different arc radii. The detachable mounting mechanism enables precise repositioning while maintaining accurate alignment, combining versatility with positioning accuracy.
Data Source
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AI summary
The invention relates to a bell-shaped cutter for producing preferably profiled, curved grooves, said cutter having a circular-disk-shaped main body (1) and a plurality of cutting inserts (2) extending substantially perpendicular to the plane of the main body, which inserts are arranged one after another along a circular path about the centre of the main body in the peripheral direction and are releasably mounted on the main body. In order to produce a bell-shaped cutter with the features specified above, which allows simplified and more cost-effective production of curved grooves without needing to dispense with the precise arrangement and alignment of the cutting plates of the known bell-shaped cutters, according to the invention positioning devices are provided on the main body, which devices allow the cutting inserts to be mounted on the main body at a plurality of different distances from one another.