Barrel Worm Tool Dressing via Disc Mesh
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Solution Overview
Problem
The existing methods for dressing barrel worm-shaped tools used in internal gear grinding lack precision, which affects the quality of the finished gears, and there is a need for a high-precision dressing method to maintain tool effectiveness over time.
Innovation Solution
A method and apparatus that utilize a disc-shaped disc dresser to mesh with a barrel worm-shaped tool, rotating at a predetermined angle, to revolve and oscillate within a horizontal plane, allowing for precise dressing of the tool by adjusting its position and movement in relation to the tool-rotating and dresser-rotating shafts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional dressing methods are used for barrel worm-shaped tools, then the dressing process is simple, but the manufacturing precision of the tool deteriorates
Solution Approach 1:
The invention makes both the barrel worm-shaped tool and the disc dresser rotate during the dressing process, rather than keeping one stationary. The tool rotates around its axis while the disc dresser rotates around its own axis, creating a dynamic dressing system that achieves high precision through rotational motion and meshing engagement.
Solution Approach 2:
The invention introduces a new dimensional approach by disposing the disc dresser's rotation axis at a specific angle equal to the helix angle of the internal gear. This angular disposition creates a three-dimensional meshing relationship between the disc dresser and the barrel worm-shaped tool, enabling precise dressing through spatial engagement.
2Productivity
If the barrel worm-shaped tool is used repeatedly for grinding internal gears, then productivity is maintained, but the tool's cutting edge profile deteriorates
Solution Approach 1:
The invention performs dressing of the barrel worm-shaped tool as a preliminary action before actual grinding operations. By periodically dressing the tool using the disc dresser, the cutting edge profile is restored and maintained, ensuring the tool remains effective for continuous productivity without degradation from repeated use.
3Manufacturing precision
If a disc-shaped disc dresser is used to mesh with the barrel worm-shaped tool, then dressing precision is improved, but the ease of operation deteriorates
Solution Approach 1:
The invention changes the operational parameters by establishing specific angular relationships: the disc dresser is disposed at an angle equal to the helix angle of the internal gear, and the rotation speeds of the tool and dresser are coordinated. These parameter changes enable precise meshing engagement while maintaining controllable operation through defined geometric relationships.
Data Source
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AI summary
A method of dressing a barrel worm-shaped tool to carry out the dressing of a barrel worm-shaped tool formed to grind tooth face of an internal gear with precision, dressing apparatus, and internal-gear grinding machine are provided. For this purpose, a disc-shaped disc dresser (13) is made to mesh with a barrel worm-shaped grinding wheel (12) having its diameter gradually increasing from the two end portions in the axial direction thereof towards the middle portion thereof and used to grind an internal gear (11). The barrel worm-shaped grinding wheel (12) is made to rotate around a tool-rotating shaft (B) disposed at a predetermined shaft angle (A1) with a vertical work-rotating shaft (C1) for the internal gear (11). The disc dresser (13) is made to rotate around a dresser-rotating shaft (D), the disc dresser (13) being disposed at an angle that is equal to a helix angle of the internal gear (11). While the barrel worm-shaped grinding wheel (12) and the disc dresser (13) mesh with each other and are rotating, the barrel worm-shaped grinding wheel (12) and the disc dresser (13) are made to revolve relative to each other within a horizontal plane.