Tool Cassette Radial Adjustment for Large Diameter Drilling
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Solution Overview
Problem
Existing modular carrier tools for drilling or milling lack a mechanism for precise and large-scale adjustment of cutting inserts, limiting their use to fine machining with small adjustment travel, typically up to 0.1 mm, which restricts their application to specific nominal drilling diameters.
Innovation Solution
A tool cassette with a main body and guide allowing a radial adjustment travel of at least 0.5 mm, featuring mating surfaces for precise fitting and a threaded bolt adjustment mechanism, enabling up to 2.5 mm adjustment, suitable for rough machining and extending the tool's application to larger drilling diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fine adjustment mechanisms are used to achieve high accuracy in cutter position, then manufacturing precision is improved, but adjustment travel is limited to a very small range (maximally up to 0.1 mm)
Solution Approach 1:
The adjustment system is segmented into two independent parts: a coarse adjustment mechanism providing large travel (0.5-2.5 mm) and a fine adjustment mechanism providing high precision (0.1 mm). This segmentation allows each mechanism to be optimized for its specific function without compromise.
Solution Approach 2:
The adjustment is separated into two dimensional aspects: radial adjustment (perpendicular to tool axis) for coarse positioning with large travel, and axial adjustment (parallel to tool axis) for fine positioning with high precision. This dimensional separation resolves the contradiction between travel range and precision.
2Manufacturing precision
If the tool is configured for specific nominal drilling diameters with fine adjustment, then manufacturing precision is improved, but adaptability to different drilling diameters deteriorates
Solution Approach 1:
The tool carrier is designed with universal adaptability through the dual-adjustment cassette system, allowing a single tool to accurately perform multiple drilling diameter operations. The coarse adjustment enables the tool to accommodate different nominal diameters, while the fine adjustment ensures precision for each diameter, making the tool universally applicable across a wide range of drilling sizes.
3Device complexity
If cutting inserts are fastened directly to the tool carrier without cassette, then device complexity is reduced, but adaptability and adjustability deteriorate
Solution Approach 1:
The tool cassette acts as a nested intermediate structure between the simple tool carrier and the cutting insert. This nested design allows the cassette with its dual-adjustment mechanisms to be inserted into the tool carrier, providing complex adjustment functionality while maintaining the simplicity of the overall tool structure. The cassette can be easily removed and replaced, preserving operational simplicity.
Data Source
AI summary
A tool has a tool carrier having a tool cassette with a main body, into which an insert seat for receiving the exchangeable cutting insert is recessed and which has a guide, extending along a direction of adjustment, for an adjusting element for adjusting the position of the main body in the cassette seat in the direction of adjustment. The main body has a first mating surface and at least one second mating surface, wherein the first mating surface extends transversely to the direction of adjustment and the second mating surface extends in the direction of adjustment, and the mating surfaces are configured for the precisely fitting contact against a corresponding first and second contact surface of the cassette seat.