Lathe Tool Holder Offset Layout for Larger Workpiece Diameters
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Solution Overview
Problem
Conventional lathe tool arrangements restrict the maximum allowable workpiece outer diameter due to tool overhangs and interference, limiting the machine's machining ability and efficiency.
Innovation Solution
A tool holder design that offsets the cutting-edge reference point of tools with respect to the X-Z plane, allowing for a more efficient arrangement of tools on the turret, enabling larger workpiece diameters to be machined without modifying the lathe components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If tools are arranged on the turret in a conventional manner, then the tool arrangement is simple and easy to operate, but the maximum allowable workpiece outer diameter is restricted due to tool overhang and interference
Solution Approach 1:
The patent offsets the tool holding position in the Y-axis direction (perpendicular to the X-Z machining plane), creating a three-dimensional tool arrangement. This dimensional change allows the cutting edge to be positioned away from the turret center axis, reducing interference with the workpiece and enabling larger workpiece diameters to be machined without modifying the lathe structure
2Reliability
If the maximum allowable workpiece outer diameter is determined by tool arrangement restrictions, then tool interference is avoided, but the lathe's inherent machining ability is not fully utilized
Solution Approach 1:
The patent changes the positional parameters of the tool holder, specifically offsetting the tool holding position from the X-Z plane by a predetermined distance in the Y-axis direction. This parameter change optimizes the tool-workpiece spatial relationship, eliminating unnecessary diameter restrictions and enabling the lathe to achieve its full machining potential
Data Source
AI summary
A tool holder for a lathe having a spindle permits improved arrangement of tools on a turret to maximize the allowable workpiece outer diameter for a given tool. A Z-axis feed mechanism moves the spindle and the turret relative to each other in a Z-axis direction along a center axis of the spindle, while an X-axis feed mechanism moves the spindle and the turret relative to each other in an X-axis direction orthogonal to the Z-axis direction. A plurality of tool holders is attached to the turret, each having a tool holding part. At least one of the tool holders holds the tool at a holding position such that, when indexed to a machining position by rotation of the turret, a cutting-edge reference point of the tool is offset with respect to an X-Z plane including a center axis of the turret.