Cutting Tool Insert Biasing for Precise Position Fixing
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Solution Overview
Problem
Existing cutting tools experience reduced machining accuracy due to inserts moving from their predetermined positions under reaction forces during machining, and the adjustment process is complicated by the need to loosen and tighten multiple screws.
Innovation Solution
A cutting tool design featuring a blade tool with a position adjustment mechanism and a pressing mechanism that allows for precise adjustment and firm fixation of the blade tool within the shaft, using a pressing mechanism to bias the blade tool toward the shaft, eliminating the need for tightening screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixing screws are loosened and clamp members are inclined to allow insert adjustment, then the inserts can be repositioned, but the inserts become unstable and may move during machining
Solution Approach 1:
The clamp member is designed to transition between a clamping state (when fixing screws are tightened) and a released state (when fixing screws are loosened). This dynamic design allows the same component to provide both adjustability and stability as needed during different operational phases.
Solution Approach 2:
The adjustment mechanism allows the insert to be repositioned before the fixing screws are tightened. Once the insert is positioned correctly, the fixing screws are tightened to secure it, preventing any movement during machining.
2Measurement precision
If adjustment screws are used to press inserts outwardly for positioning, then cutting edge positions can be adjusted, but the adjustment process becomes complicated requiring precise screw rotation
Solution Approach 1:
The adjustment screw acts as an intermediary mechanism that converts rotational motion into linear pressing force. By pressing the inclined surface of the clamp member, it indirectly adjusts the insert position without requiring direct manipulation of the insert itself, simplifying the adjustment process.
Solution Approach 2:
The inclined surface on the clamp member allows the adjustment screw to convert rotational movement into controlled linear displacement of the insert. This geometric relationship provides smooth, predictable adjustment motion that is easier to control than direct linear adjustment mechanisms.
3Reliability
If multiple fixing screws and adjustment screws are used to secure inserts, then the inserts can be firmly fixed, but the tightening process becomes time-consuming and complex
Solution Approach 1:
The fixing screw serves dual functions: it secures the clamp member to the tool holder and simultaneously applies clamping force to hold the insert in place. This merged function eliminates the need for separate clamping and fixing operations, reducing the number of steps required.
Solution Approach 2:
The fixing screw is designed to perform multiple functions: positioning the clamp member, securing the insert, and maintaining clamping pressure during machining. This multi-functional design simplifies the overall fixation process while ensuring reliable insert retention.
4Manufacturing precision
If the blade tool is pressed against the inner surface of the insertion hole, then machining precision is improved, but the blade tool may become difficult to insert or remove
Solution Approach 1:
The pressing mechanism is designed to apply force only after the blade tool is properly inserted and positioned. During insertion, the blade tool can move freely; once positioned, the pressing mechanism engages to secure it against the inner surface, ensuring precision without hindering installation.
Solution Approach 2:
The blade tool is inserted into the insertion hole first, allowing easy positioning. After the blade tool is in place, the pressing mechanism is activated to press it against the inner surface, ensuring machining precision is achieved after installation rather than during the insertion process.
Data Source
AI summary
This cutting tool comprises a tool shaft, a blade implement, a position adjustment mechanism, and a pressing mechanism. The blade implement is disposed so as to be capable of moving into an insertion hole in the tool shaft. The position adjustment mechanism is capable of adjusting the position of the blade implement relative to the tool shaft. The pressing mechanism is attached to the tool shaft. The pressing mechanism presses a grinding relief part of the blade implement. The pressing mechanism biases the blade implement toward a base end. The pressing mechanism biases the blade implement toward an inner peripheral surface of the insertion hole.