Internal Gear Grinding with Threaded Barrel Grindstone
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Solution Overview
Problem
Conventional internal gear grinding methods using plate-shaped grindstones require multiple operations to grind each tooth space, significantly increasing processing time.
Innovation Solution
An internal gear grinding method utilizing a threaded grindstone with a barrel shape, synchronized with the internal gear, allowing for simultaneous grinding of multiple tooth surfaces at a specific axis intersection angle, and employing a dressing tool to maintain the grindstone's effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a plate-shaped grindstone is used for internal gear grinding, then the grinding operation can be performed with a simple grindstone structure, but the processing time increases significantly because only one tooth space can be ground at a time
Solution Approach 1:
The grindstone is segmented into multiple blade elements arranged circumferentially around the rotation axis. Each blade has a grinding surface that corresponds to a specific tooth space of the internal gear. This segmentation allows multiple tooth spaces to be ground simultaneously during a single rotation, dramatically reducing processing time while maintaining a relatively simple overall grindstone structure
Solution Approach 2:
The invention transitions from a single-plane plate-shaped grindstone to a three-dimensional barrel-shaped grindstone with blades distributed around the circumference. This dimensional change enables the grindstone to engage multiple tooth spaces at different angular positions simultaneously, converting a sequential one-dimensional grinding process into a parallel multi-dimensional process
2Productivity
If multiple plate-shaped grindstones are used to grind all tooth surfaces, then all tooth spaces can be ground, but the device complexity and processing time increase
Solution Approach 1:
Multiple grinding functions are merged into a single barrel-shaped grindstone by arranging multiple blades circumferentially around one rotation axis. This unified structure allows all tooth spaces of the internal gear to be ground by one grindstone during a single engagement, eliminating the need for multiple separate grindstones and their associated mounting and adjustment mechanisms
Solution Approach 2:
The barrel-shaped grindstone is designed with multi-functionality, where each blade on the grindstone can grind a specific tooth space. The entire grindstone structure serves multiple purposes simultaneously - it can grind all tooth spaces in one operation, and the blades can be dressed collectively as a unit, improving both productivity and simplifying maintenance
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the efficient grinding of internal gears with arc-shaped teeth in a shorter time by utilizing multiple blade surfaces of the threaded grindstone, reducing processing time and improving accuracy.
Implementation Method 1
grinding an internal gear having arc-shaped teeth using a threaded grindstone with a barrel shape having blades with a shape corresponding to the arc shape of the teeth
Implementation Method 2
a dressing tool that dresses the threaded grindstone by engaging with the threaded grindstone at a prescribed second axis intersection angle
Data Source
AI summary
Provided is an internal gear grinding method that makes it possible to grind an internal gear having arc-shaped teeth in a short amount of time. To this end, an internal gear having arc-shaped teeth and a threaded grindstone with a barrel shape having blades with a shape corresponding to the arc shape of the teeth are engaged at a predetermined axis intersection angle, and the internal gear and the threaded grindstone are made to rotate in synchronization with each other so that the tooth surface of the internal gear is ground by the blade surface of the threaded grindstone.