Barrel Spiral Tool Dressing via Gear Meshing
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Solution Overview
Problem
The complexity of dressing a barrel-shaped threaded tool in internal gear grinding machines leads to increased machine size and operational complexity, necessitating a solution for simplifying the dressing process while achieving high accuracy and space savings.
Innovation Solution
An internal gear grinding machine with a dressing method that synchronously rotates the internal gear and barrel-shaped threaded tool, utilizing a disk-shaped dresser with adjustable axes to match the tool's shape, allowing for precise dressing operations by rotating, moving, and adjusting the dresser and tool in accordance with the tool's geometry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dressing device for dressing a barrel-shaped threaded grinding wheel is provided in an internal gear grinding machine, then the grinding wheel can be dressed to maintain high accuracy, but the dressing operation becomes complex and the machine size increases
Solution Approach 1:
The internal gear grinding machine is designed to perform both grinding and dressing operations using the same basic structure. The dressing device utilizes the existing gear meshing mechanism, allowing the threaded grinding wheel to be dressed while meshing with the internal gear, eliminating the need for separate dedicated dressing equipment and reducing overall system complexity
Solution Approach 2:
The threaded grinding wheel is dressed by meshing it with the internal gear itself during the grinding operation. The internal gear acts as both the workpiece and the dressing tool guide, allowing the grinding wheel to be dressed in-situ without requiring external dressing equipment, thereby simplifying the machine structure
2Manufacturing precision
If a dressing device for dressing a barrel-shaped threaded grinding wheel is provided in an internal gear grinding machine, then the grinding wheel can be dressed to maintain high accuracy, but the machine size increases
Solution Approach 1:
The internal gear grinding machine is designed to perform both grinding and dressing operations using the same basic structure. The dressing device utilizes the existing gear meshing mechanism, allowing the threaded grinding wheel to be dressed while meshing with the internal gear, eliminating the need for separate dedicated dressing equipment and reducing overall system complexity
Solution Approach 2:
The dressing operation is nested within the existing grinding machine structure by utilizing the space and mechanisms already present for grinding operations. The threaded grinding wheel is dressed in-situ within the gear meshing area, eliminating the need for external dressing equipment and reducing the overall machine footprint
Data Source
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AI summary
Provided is an internal gear grinding machine that is compact and can save the installation space by simplifying the dressing operation. The internal gear grinding machine has a spiral grinding tool (17) of barrel shape which is rotated during grinding in synchronism with a rotation of a work (W). The grinding machine is further provided with a dressing apparatus (20) for dressing the tool (17) by means of a dressing disk (56). During dressing operation, the motions of the tool (17) and the dressing disk (56) are controlled according to the spiral angle and the barrel shape.