Threaded Gear Grinding Wheel Layout for Sequential Finish Grinding
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Solution Overview
Problem
Conventional threaded grinding wheels with rough-finish and finish grinding surfaces formed in a helical pattern next to each other in the radial direction have reduced widthwise areas, leading to potential surface contact issues and difficulty in improving gear machining accuracy, especially when the grinding wheel is small.
Innovation Solution
A threaded grinding wheel composed of two types of grinding wheels differing in performance, where one is used for finish grinding and the other for super-finish grinding, with the ability to connect their surfaces for flush grinding and sequential use, allowing for accurate gear grinding with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rough-finish grinding surface and finish grinding surface are formed next to each other in the grinding-wheel radial direction, then gear grinding can be performed in two steps, but the widthwise areas of both grinding surfaces are reduced
Solution Approach 1:
The patent transitions from arranging grinding surfaces in the radial direction (one dimension) to arranging them in the axial direction (another dimension). This dimensional change allows multiple grinding surfaces to coexist without reducing the widthwise area, as they are stacked along the axis rather than side-by-side in the radial plane.
Solution Approach 2:
The grinding wheel is segmented into multiple independent grinding surfaces (rough-finish and finish grinding surfaces) positioned at different axial locations. This segmentation allows each surface to maintain its full widthwise area while enabling sequential use for different grinding operations.
2Manufacturing precision
If rough-finish grinding surface and finish grinding surface are formed next to each other in the grinding-wheel radial direction, then two types of grinding can be performed, but it is very difficult to form the finish grinding surface further in the helical rough-finish grinding surface
Solution Approach 1:
The patent positions grinding surfaces in the axial direction rather than attempting to form one surface within another in the radial direction. This dimensional repositioning simplifies the manufacturing process by allowing independent formation of each grinding surface at its designated axial location without complex nested structuring.
3Volume of moving object
If the threaded grinding wheel itself is small, then compact design is achieved, but it is remarkably difficult to form the finish grinding surface further in the helical rough-finish grinding surface
Solution Approach 1:
For small grinding wheels, the patent utilizes the axial direction to accommodate multiple grinding surfaces, which is particularly advantageous when radial space is limited. This allows compact radial dimensions while maintaining sufficient area for multiple grinding surfaces by stacking them axially.
Solution Approach 2:
The small grinding wheel is segmented into multiple functional zones along its axis, with each zone dedicated to a specific grinding operation. This segmentation enables the wheel to perform multiple functions despite its small overall size, as each axial segment contributes to the total grinding capability.
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
The solution enables accurate gear grinding by allowing for the sequential use of two types of grinding processes, improving machining accuracy and maintaining a simple structure, even with smaller grinding wheels.
Implementation Method 1
rotating a gear and a threaded grinding wheel in mesh with each other to grind the gear's tooth surfaces with the threaded grinding wheel's grinding surfaces
Data Source
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AI summary
Provided are: a screw-shaped grindstone for grinding gears that has a simple configuration and is capable of grinding gears with high precision; and a method for grinding gears. The screw-shaped grindstone (20) for grinding gears, which grinds a workpiece (W1) by rotating while meshing with the workpiece (W1), comprises a screw-shaped grindstone (21) that grinds the workpiece (W1), and a screw-shaped grindstone (22) that is linked to the screw-shaped grindstone (21) on the same axis, and grinds the workpiece (W1), which has been ground by the screw-shaped grindstone (21). A plurality of grinding ranges (L1, L2) that are sectioned at prescribed lengths in the width direction of the grindstone are established with respect to the screw-shaped grindstones (21, 22), and each grinding range (L1, L2) of the screw-shaped grindstones (21, 22) serves as the range of use per workpiece (W1).