Carbide Cutting Tool Modular Blade Fixing
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Solution Overview
Problem
Current cutting tools for granulators, particularly those with helical blades, have short working lives and high maintenance costs due to frequent wear, leading to increased downtime and expense, especially when using monobloc tools made of sintered steel or carbide, which require replacement of the entire tool upon blade deterioration.
Innovation Solution
A rotary cutting tool with individual blades featuring radial cutting edges, helically ground and set at regular intervals on a cylindrical spindle, with mechanical fixation using cone-headed screws and reinforced by covers, allowing for easy replacement and reduced manufacturing costs, and made from durable materials like carbide or ceramics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If monobloc cutting tools made of sintered steel or carbide are used, then the working life of the cutting tool is increased by 5 to 10 times, but the cost of manufacture increases and the entire tool must be replaced when a single blade deteriorates
Solution Approach 1:
The cutting tool is divided into modular components: individual carbide blades that can be independently replaced, a support structure with slots, and fixing mechanisms. This segmentation allows replacement of only worn blades rather than the entire tool, reducing manufacturing costs and complexity while maintaining extended working life through component reuse
Solution Approach 2:
The invention enables selective discarding and recovery of individual carbide blades when they wear out, while the support structure and other components are recovered and reused. This approach maintains the extended durability benefits of carbide materials while avoiding the waste and cost of replacing the entire tool assembly
2Productivity
If individual blades are set axially along the whole length of the support cylinder body with helical cutting edges, then the cutting performance is improved, but the positioning and fixing operations become extremely delicate and complex
Solution Approach 1:
The tool is segmented into discrete blade units positioned in separate slots along the support cylinder, with each blade independently fixable. This modular approach simplifies positioning and fixing operations compared to continuous helical blade arrangements, while maintaining cutting performance through proper blade orientation and spacing
Solution Approach 2:
The support structure includes pre-formed slots and fixing mechanisms (screws, clamps, or interference fits) that guide blade positioning before final securing. This preliminary preparation of mounting features simplifies the overall positioning and fixing process, reducing operational complexity while maintaining precise blade alignment for effective cutting
Data Source
AI summary
The present invention concerns a rotary cutting tool (1) with a cylindrical supporting spindle (2) and several individual blades (3) with essentially radial cutting edges, helically ground and set at regular intervals on the outer surface of the spindle, each blade (3) having a rectilinear base (4) which inserts into a slot (5) of the same shape as said base, each individual blade (3) being mechanically fixed to the spindle (2), characterized in that it also comprises two covers (8, 9) fixed to the respective bases (8′, 9′) of the spindle (2) so as to reinforce the fixing of the blades (3).