Cutting Tool Cassette Ridge-Groove Mounting Against Side-Force Shift
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Solution Overview
Problem
During heavy machining of metallic workpieces, cutting tools with exchangeable cutting inserts experience wear and damage, leading to potential damage of the toolholder due to chip breakage and high heat generation, and the cassette displacement under side forces affects machining quality.
Innovation Solution
A cassette design with a bottom surface featuring alternating parallel ridges and grooves, symmetrically arranged cassette holes, and internal coolant channels, providing stable mounting and improved heat dissipation, while allowing for even distribution of clamping forces and coolant delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cassette is used to support the cutting insert and protect the toolholder, then the toolholder protection and adaptability are improved, but the cassette may be displaced by side forces during heavy machining, negatively impacting machining quality
Solution Approach 1:
The patent introduces a new dimension of engagement by adding side surfaces with grooves and ridges that mate laterally between the cassette and tool seat. This lateral engagement dimension complements the traditional bottom-surface mounting, creating a multi-dimensional constraint system that prevents cassette displacement while maintaining toolholder protection.
Solution Approach 2:
The side surfaces of both the cassette and tool seat are segmented into alternating grooves and ridges, creating multiple discrete engagement points along the lateral interface. This segmentation distributes the side force loads across multiple contact points, enhancing positional stability without requiring excessive clamping force.
2Productivity
If heavy machining is performed on metallic workpieces, then productivity is improved, but high heat is generated and high side forces are exerted on the cassette, causing displacement and potential damage
Solution Approach 1:
By adding lateral groove-and-ridge engagement surfaces, the patent creates an additional dimension of force distribution. Side forces during heavy machining are distributed across multiple lateral contact points rather than concentrating on the mounting screws, allowing higher productivity operations without cassette displacement.
Solution Approach 2:
The patent merges the mounting function with the lateral constraint function into a unified groove-and-ridge interface system. This combined structure simultaneously secures the cassette axially and laterally, enabling the system to withstand both heat generation and side forces inherent in heavy machining operations.
3Stability of the object's composition
If the bottom surface has mirror symmetry with respect to the bisecting plane, then the clamping forces are evenly distributed, but the structure becomes more complex with multiple symmetric features
Solution Approach 1:
While maintaining mirror symmetry for the groove patterns, the patent introduces asymmetric positioning of the fastening member openings relative to the groove features. This selective asymmetry allows even clamping force distribution through symmetric grooves while simplifying the overall structure by not requiring symmetric placement of all features, including the fastening openings.
Data Source
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AI summary
The invention is related to a cassette (100) configured to be mounted in a tool seat (210) of a cutting tool (800) for chip removing machining, wherein the cassette (100) comprises an insert seat (114) configured to support a cutting insert (300) in the cassette (100). The bottom surface (104) of the cassette (100) comprises first and second cassette holes (116, 120) configured to receive a first and second fastening members (400, 500) for fastening the cassette in the tool seat (210). The bottom surface (104) also comprises alternating parallel ridges (126) and grooves (124) extending in the direction of the longitudinal axis A and configured to mate with alternating parallel grooves (216) and ridges (214) arranged in the tool seat (210). The invention also relates to a cutting tool (800) comprising such a cassette (100).