Gear Cutter Phase Shift Control for Faster Helix Flank Machining
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Solution Overview
Problem
The existing gear machining methods face challenges in reducing cycle time when forming tooth flanks with different helix angles, as they require stopping and re-adjusting the phase and posture of the tool relative to the workpiece, increasing the time between cutting operations.
Innovation Solution
A gear machining apparatus and method that synchronously rotates the gear cutter and workpiece with an inclined cutter axis, using a machining control unit to adjust the phase shift angle and feed operation to minimize the time between forming different tooth flanks, allowing continuous cutting work without stopping the rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the phase and posture of the tool are re-adjusted between cutting operations for different tooth flanks, then the machining accuracy is improved, but the cycle time increases due to stopping and re-adjusting
Solution Approach 1:
The machining control unit pre-calculates and stores the optimal phase shift angles for different tooth flank machining operations in advance. When machining different tooth flanks with different helix angles, the control unit retrieves and applies the pre-determined phase shift angles without stopping the synchronous rotation, thereby maintaining machining accuracy while eliminating adjustment time
Solution Approach 2:
The invention maintains continuous synchronous rotation of the gear cutter and workpiece throughout the machining of different tooth flanks. By dynamically adjusting the phase shift angle during continuous operation rather than stopping for re-adjustment, the system preserves both machining accuracy and operational continuity, thus reducing cycle time
2Adaptability or versatility
If the gear cutter axis is inclined with respect to the workpiece axis, then different helix angles for tooth flanks can be achieved, but the complexity of the machining control system increases
Solution Approach 1:
The machining control unit is designed to perform multiple functions: it controls the synchronous rotation of the gear cutter and workpiece, dynamically adjusts the phase shift angle based on the required helix angle, and manages the inclined axis configuration. This multi-functional control unit eliminates the need for separate adjustment mechanisms, thereby achieving versatility without proportionally increasing system complexity
Solution Approach 2:
The system achieves different helix angles by dynamically changing the phase shift angle parameter during machining operations. Instead of requiring physical reconfiguration of the inclined axis for each helix angle, the control unit adjusts the rotational phase relationship between the cutter and workpiece, simplifying the control mechanism while maintaining adaptability
Data Source
AI summary
A gear machining apparatus and a gear machining method are provided. The gear machining apparatus performs cutting work for a workpiece and generates a gear by performing a feed operation of a gear cutter relative to the workpiece along a direction of an axis of the workpiece while synchronously rotating the gear cutter and the workpiece in a state in which an axis of the gear cutter is inclined with respect to a line parallel to the axis of the workpiece. The gear machining apparatus sets a correction angle to a first angle when cutting work for a second tooth flank is started after cutting work for a first tooth flank is finished, and moves the gear cutter from a first finish position to a second start position while rotating the workpiece and the gear cutter.