Segmented Tool Holder for Quick Milling Insert Replacement
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Solution Overview
Problem
Existing tools for external milling or turning of workpieces require lengthy refitting times and complex handling processes due to the need to replace individual cutting inserts or cassettes, leading to inefficiencies in machining operations.
Innovation Solution
A tool holder system featuring an annular or segmental holder that is detachably fastened to a machine spindle or adapter, allowing for quick removal and replacement of cutting inserts or cassettes, reducing the number of fastening means and enabling easier handling, with options for screw-based or clamping wedge-based fastening systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If individual cutting inserts or cassettes are replaced on traditional tool holders, then the cutting tool can be reused, but refitting times become lengthy and handling becomes complex
Solution Approach 1:
The tool holder is divided into multiple detachable segments that can be independently removed and replaced. Each segment contains one or more cutting inserts, allowing operators to quickly swap only the worn segments rather than replacing individual inserts or the entire tool holder, significantly reducing refitting time and simplifying handling
Solution Approach 2:
The segmented tool holder design allows the same holder structure to accommodate multiple cutting inserts with different geometries and functions. Different segment configurations can be used for various machining operations (crank-pin machining, undercutting, etc.), reducing the need for multiple specialized tool holders
2Ease of manufacture
If traditional tool holders with multiple fastening means are used, then cutting inserts can be securely mounted, but the number of fastening components increases material costs
Solution Approach 1:
By segmenting the tool holder, the number of fastening means required is reduced. Each segment requires fewer fasteners compared to traditional designs, and segments can be quickly attached and detached without requiring multiple screws or complex clamping mechanisms, thereby reducing material costs while maintaining secure mounting
Solution Approach 2:
Cutting inserts are pre-mounted on segments in a controlled environment before the segments are installed on the tool holder. This preliminary assembly allows for optimized fastening configurations and reduces the need for excessive fastening components during operational changes
3Productivity
If complete tool holders are removed and replaced, then all cutting inserts can be renewed, but additional lifting mechanisms such as cranes are required
Solution Approach 1:
The tool holder is segmented into smaller, lighter sections that can be manually handled and replaced without requiring heavy-duty lifting equipment. Each segment weighs sufficiently less than a complete tool holder to allow manual manipulation by operators, eliminating the need for cranes or other automated lifting mechanisms
Solution Approach 2:
Instead of replacing the complete tool holder, only the necessary segments containing worn cutting inserts are replaced. This partial replacement approach reduces the weight and complexity of the replacement operation, making it feasible without additional lifting equipment while still achieving the goal of renewing cutting inserts
Data Source
AI summary
The invention relates to a tool for the outside milling or for the rotary broaching of tools that rotate about the longitudinal axis thereof during machining. A disk-shaped tool carrier includes peripherally arranged cutting inserts or cartridges having cutting inserts. According to the invention, the cutting inserts or the cartridges are arranged on a ring-shaped or partially ring-shaped, segment-shaped carrier that is removably fastened to a machine spindle either directly or indirectly by an adapter.