Boring Tool Insert Clamping With Inclined Holder Surfaces
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Solution Overview
Problem
Existing boring tools and cutting inserts lack a simple structure that effectively enhances clamping performance.
Innovation Solution
A boring tool and cutting insert design featuring a cutting insert attached to a holder with a pressing member, utilizing a base member with inclined side surfaces and a holder with axial and radial holes, ensuring secure fixation and improved clamping through inclined inner side surfaces and a coolant supply system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional boring tool structure is used, then the device complexity is low, but the clamping performance is insufficient
Solution Approach 1:
The cutting insert is divided into a base member and a cutting member, allowing independent optimization of each component. The base member includes multiple inclined side surfaces (first, second, third, and fourth side surfaces) that can be independently designed to optimize clamping geometry without complicating the overall structure
Solution Approach 2:
The cutting insert is nested within the holder through a precisely configured hole structure. The holder includes a first hole for the pressing member and a second hole for the cutting insert, with inclined inner side surfaces that guide and secure the insert in place, creating a compact nested arrangement that improves clamping without adding external complexity
2Reliability
If multiple inclined side surfaces are added to the base member, then the clamping performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The base member features asymmetric inclined side surfaces with different orientations (first, second, third, and fourth side surfaces inclined at different angles). This asymmetric geometry provides enhanced clamping performance through optimized force distribution while allowing each surface to be manufactured independently to standard tolerances, rather than requiring complex multi-axis precision
Solution Approach 2:
Each side surface of the base member is designed with specific local geometric properties optimized for its clamping function. The inclined inner side surfaces of the holder's second hole are similarly optimized locally to match the base member surfaces, allowing precision to be concentrated where most needed for clamping contact
3Force
If the distance between inner side surfaces decreases toward the rear end, then the clamping force is enhanced, but the insertion difficulty increases
Solution Approach 1:
The inclined inner side surfaces of the holder's second hole are configured to guide the base member into place during insertion. The gradual narrowing from front to rear end creates a self-aligning effect that facilitates easy insertion while automatically positioning the insert for optimal clamping, eliminating the need for forceful insertion
Solution Approach 2:
The clamping mechanism utilizes the axial dimension (front to rear end) to create the force-enhancing geometry, while the radial insertion path remains open and unobstructed. This separates the insertion function (radial) from the clamping function (axial), allowing both to be optimized independently
Data Source
AI summary
A boring tool has a cutting insert, a holder, and a pressing member. The cutting insert includes a base member and a cutting member. The base member includes a first side surface, a second side surface, a third side surface, and a fourth side surface. The holder includes a front end surface, a rear end surface, and an outer peripheral surface. The holder is provided with a first hole and a second hole. The first hole is opened in the front end surface. The second hole is opened in the outer peripheral surface. The holder includes a stopper. A surface defining the second hole includes a first inner side surface and a second inner side surface. The pressing member is in contact with the fourth side surface in a state in which the pressing member is disposed in the first hole.