Turning Tool Rake Face Tilt for High-Feed Surface Finishing
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Solution Overview
Problem
Existing turning apparatuses face challenges in achieving the desired surface roughness and cutting force while optimizing cutting times during the machining of rotationally symmetric surfaces, as they struggle to balance surface quality for applications requiring low wear and effective lubrication.
Innovation Solution
The method involves rotating the workpiece around a rotational axis, positioning a cutting tool with a tilted cutting edge relative to the feed direction, and adjusting the rake face orientation to specific angles (35° to 60°) to enhance surface roughness, along with a feed rate range of 0.2 mm to 1.2 mm per revolution, allowing for effective machining of both external and internal surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional turning methods are used with standard cutting tool orientation, then cutting time is reduced, but surface roughness quality deteriorates
Solution Approach 1:
The cutting tool is oriented asymmetrically relative to the feed direction by tilting the rake face normal by angle α (35°-60°) around the first axis. This asymmetric orientation optimizes the cutting edge geometry for high feed rates while maintaining good surface roughness, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The invention changes the geometric parameters of the cutting tool orientation, specifically tilting the rake face normal by angle α (35°-60°) and angle δ (0°-15°) to optimize the cutting edge configuration. This parameter optimization enables achieving good surface roughness at high feed rates up to 1.2 mm/revolution, simultaneously improving productivity and maintaining manufacturing precision.
2Productivity
If high feed rates are used to improve productivity, then cutting time is reduced, but surface roughness quality deteriorates
Solution Approach 1:
The asymmetric tilting of the rake face normal by angle α (35°-60°) creates an optimized cutting edge geometry that performs effectively at high feed rates. This asymmetric configuration allows the cutting tool to maintain good surface roughness quality even when operating at feed rates up to 1.2 mm/revolution, thus resolving the trade-off between productivity and manufacturing precision.
Solution Approach 2:
By optimizing the geometric parameters α (35°-60°) and δ (0°-15°) of the cutting tool orientation, the invention enables the use of high feed rates (up to 1.2 mm/revolution) while maintaining good surface roughness. This parameter optimization directly addresses the contradiction by allowing high productivity without sacrificing manufacturing precision.
3Manufacturing precision
If surface roughness is optimized for low wear applications, then manufacturing precision is improved, but cutting force increases
Solution Approach 1:
The optimized parameter configuration (α: 35°-60°, δ: 0°-15°) creates a balanced cutting geometry that achieves good surface roughness while managing cutting forces effectively. The specific angular relationships optimize the chip flow and cutting edge engagement, allowing high feed rates with acceptable cutting forces, thus resolving the contradiction between manufacturing precision and cutting force.
Data Source
AI summary
In accordance with various illustrative embodiments of the present disclosure, a rotationally symmetric surface of a workpiece is machined by a turning apparatus, wherein the workpiece is rotationally driven around a rotational axis, a cutting tool with a cutting edge positioned at the edge of a rake face is arranged relative to the workpiece, the cutting tool is brought into contact with the workpiece, and the cutting tool is advanced relative to the workpiece along a feed direction parallel to the rotational axis, the normal to the rake face being tilted relative to the feed direction, a first axis and a second axis, the first axis and the second axis are perpendicular to the feed direction and perpendicular to each other.