Y-Axis Insert Holder Positioning for Precise Tool Projection
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Solution Overview
Problem
In Y-axis direction automatic cutting lathes, the adjustment of the cutting tool's core height and projection amount is not accurately considered, leading to potential dispersion within tolerance limits due to manufacturing accuracy limitations of the holder and insert.
Innovation Solution
A holder design that allows adjustable projection amounts along the X-axis and includes a positioning portion on the end portion to determine the cutting insert's projection from the tool rest, enabling precise adjustment and alignment for accurate cutting operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the holder and insert are manufactured with standard manufacturing accuracy, then production cost and manufacturing time are reduced, but the projection amount and core height of the cutting tool exhibit dispersion within tolerance limits
Solution Approach 1:
The positioning portion is pre-formed on the holder at a location distant from the corner edge, establishing a predetermined reference position before the actual cutting operation. This preliminary positioning structure eliminates the need for post-manufacturing adjustments and ensures consistent projection amount and core height without requiring ultra-precise manufacturing tolerances.
Solution Approach 2:
The positioning portion acts as an intermediary reference element between the holder and the cutting insert. By placing this reference feature at a distance from the corner edge, it provides a stable baseline for determining projection amount and core height, decoupling the precision requirement from the corner edge itself and allowing standard manufacturing accuracy to suffice.
2Measurement precision
If the positioning portion is disposed close to the corner edge, then the structure is simplified, but the determination of projection amount becomes less accurate due to interference with cutting operations
Solution Approach 1:
Different regions of the holder are assigned different functions: the corner edge region is dedicated to cutting operations, while a separate region distant from the corner edge is assigned to the positioning portion. This spatial separation of functions allows the positioning portion to be accurately determined without interfering with the cutting edge's proximity to the workpiece.
Solution Approach 2:
The positioning portion is placed in a different spatial dimension relative to the corner edge, specifically at a position distant along the holder's length. This dimensional separation allows both the positioning reference and the cutting function to coexist without interference, enabling accurate projection amount determination while maintaining adequate cutting geometry.
3Ease of operation
If adjustment of core height is performed by placing shims, then the height can be adjusted, but the operation becomes more complex and time-consuming
Solution Approach 1:
The holder's positioning portion provides self-positioning capability for the cutting insert. By incorporating the reference feature directly into the holder structure at a predetermined location, the system eliminates the need for external shims or complex adjustment mechanisms. The insert automatically achieves the correct position relative to the positioning portion, enabling quick installation without time-consuming adjustment operations.
Data Source
AI summary
Provided is a holder of a cutting insert that performs turning on a work by feeding a cutting edge in a Y axis direction which is different from a longitudinal direction (X axis) of a tool holder installed in a tool rest, and that can easily adjust the projection amount without contacting a part of the holder to the tool rest. A Y axis holder holds the cutting insert including a cutting edge to perform turning on a work that moves along the Z axis, and is installed in a state where relative movement in the X axis direction with respect to the tool rest is possible, such that a projection amount of the cutting insert along the X axis is changeable. The Y axis holder performs turning on the work using the cutting insert when the holder moves in the Y axis direction which is different from the X axis direction. The Y axis holder has a shape in which an end portion thereof in the X axis direction is projected from the cutting edge of the cutting insert, and a positioning portion to determine the projection amount of the cutting insert from the tool rest is disposed on the end portion.