Cutting Tool Holder With Segmented Convex Pins
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Solution Overview
Problem
Existing tool holder mechanisms for cutting tools are difficult and costly to manufacture due to the complexity of forming insert-receiving seats within the tool holder, and they lack improved manufacturing tolerances and durability.
Innovation Solution
A cutting tool design featuring a tool holder body with separate convex pins that provide parallel and non-perpendicular lines of contact to the cutting insert, made of harder materials for increased rigidity and precision, along with a clamping screw and angled second pin to facilitate stable insert positioning and easy manufacturing, and integrated coolant channels for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insert-receiving seat is formed in the body of the tool holder, then the cutting insert can be securely held, but the manufacturing process becomes time-consuming and difficult to machine within tolerances
Solution Approach 1:
The insert-receiving seat is segmented into separate convex pins that are mounted in the tool holder body rather than forming a single integrated seat. This segmentation simplifies manufacturing as the pins can be produced independently and mounted separately, reducing the complexity of machining the entire seat within tight tolerances while maintaining secure insert holding through the pin contact surfaces.
2Reliability
If the insert-receiving seat is formed in the body of the tool holder, then the cutting insert can be securely held, but the manufacturing cost increases
Solution Approach 1:
By segmenting the insert-receiving seat into separate convex pins, the manufacturing process is simplified and can be performed more efficiently. The pins can be manufactured using simpler processes and then mounted in the tool holder, reducing overall manufacturing cost while maintaining the secure holding function through the pin-insert contact surfaces.
3Manufacturing precision
If separate pins are used to constitute the convex walls, then manufacturing is simplified and tolerances are improved, but the device complexity increases
Solution Approach 1:
The insert seat is divided into separate convex pins that can be manufactured independently with precise tolerances using standard machining processes. Each pin serves as a discrete positioning element, and their individual precision contributes to the overall accuracy of insert positioning without requiring the entire seat to be machined as a single complex component.
Solution Approach 2:
The convex pins serve multiple functions: they provide precise positioning of the cutting insert, define the insert-receiving seat geometry, and can be standardized components that work with various insert types. This multi-functionality reduces the need for specialized complex features while maintaining manufacturing precision.
Data Source
Figure 1A~1C
Figure 1D~1E
Figure 2A~2B
AI summary
The present invention relates to a cutting tool having a tool holder body (14') having a shank portion (12') and a head portion (13'); an indexable cutting insert in a cutting insert seat comprising, a first convex wall (19') and a second convex wall and at least one bottom surface (16'), at which the cutting insert is supposed to abut, the cutting insert having a cutting edge and a clearance surface. The convex walls are situated on separate pins (21',23'), which are perpendicular or substantially perpendicular to each other when seen in a side view. The second convex wall is situated below the cutting edge.