Disk Dresser for Drum-Shaped Gear-Like Grindstone
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Solution Overview
Problem
Conventional hourglass gear-shaped grinding-wheel dressing methods require precise machining of the dressing gear's tooth profile and changing the edge profile of the grinding wheel every time the gear's tooth profile is altered, making it difficult to accurately dress the grinding wheel without altering the dresser's edge profile.
Innovation Solution
An hourglass gear-shaped grinding-wheel dressing method using a disk dresser that synchronously rotates with the grinding wheel, allowing for line contact with the helical gear to match the edge profile of the disk dresser with the normal plane of the gear's teeth, and moving in three perpendicular axes to adjust the edge profile of the grinding wheel without changing the disk dresser's edge profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a dressing gear is used to dress the grinding wheel, then the grinding wheel can be dressed, but the tooth profile of the dressing gear must be machined with extremely high precision and is difficult to control
Solution Approach 1:
The patent uses a disk dresser with a copying mechanism where the tooth profile of the workpiece gear is copied onto the grinding wheel through meshing contact. The disk dresser copies the actual tooth profile of the gear being ground, eliminating the need for pre-machining the dressing tool with high precision. This is achieved by having the disk dresser engage with the workpiece gear and transfer its profile to the grinding wheel during the dressing operation.
2Adaptability or versatility
If a dressing gear is used, then the grinding wheel can be dressed, but changing the tooth profile of the gear requires changing both the dressing gear and the grinding wheel edge profile
Solution Approach 1:
The disk dresser is designed as a universal tool that can dress grinding wheels for different tooth profiles by simply changing the workpiece gear used for copying. The same disk dresser mechanism serves multiple functions by adapting to different gear geometries through the copying process, eliminating the need for multiple specialized dressing gears. The system becomes multi-functional because the copying mechanism can replicate any tooth profile that engages with it.
Solution Approach 2:
The patent employs dynamic adjustment capabilities where the disk dresser and grinding wheel can be moved relative to each other in three perpendicular axes. This dynamic positioning system allows the edge profile of the grinding wheel to be adjusted to match different tooth profiles without changing the disk dresser itself, enabling adaptability through motion control rather than physical component changes.
3Manufacturing precision
If conventional dressing methods are used, then the grinding wheel can be dressed, but the edge profile of the grinding wheel cannot be accurately changed without altering the dresser's edge profile
Solution Approach 1:
The patent implements dynamic movement of the disk dresser and grinding wheel relative to each other along three perpendicular axes, allowing precise adjustment of the grinding wheel's edge profile. This dynamic system enables the grinding wheel to be dressed with different edge profiles while keeping the disk dresser stationary in terms of its own geometry, achieving both accuracy and adaptability through controlled motion rather than physical changes to the dresser.
Data Source
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AI summary
The purpose of the present invention is to provide a disk dresser and a dressing method for a drum-shaped gear-like grindstone that enables high-precision dressing of a drum-shaped gear-like grindstone and enables the shape of the cutting teeth of the gear-like grindstone to be changed without changing the shape of the cutting teeth of the disk dresser. In order to achieve the foregoing, in a dressing method in which a drum-shaped gear-like grindstone (12) that grinds a workpiece (W) is brought into linear contact with the workpiece (W) so as to link with the contours of the tooth right angle cross-section orthogonal to the twist direction of the workpiece teeth (Wa), and the gear-like grindstone (12) and a disk dresser (14), in an engaged state, are caused to rotate synchronously, thereby causing the drum-shaped gear-like grindstone (12) to be dressed by the disk dresser (14), the disk dresser (14) blade shape is made to match the tooth right angle cross-section shape of the teeth (Wa) of the ground workpiece (W), the gear-like grindstone (12) and the disk dresser (14) are caused to move and revolve in accordance with the drum shape and the angle of twist of the gear-like grindstone (12).