Grinding Worm Dressing via Angled Turning Ruler
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Solution Overview
Problem
Existing methods for dressing grinding worms or wheels are complex, require long dressing bars, excessive cooling, and inefficient due to the need for precise alignment and diameter measurement, leading to increased time and resource consumption.
Innovation Solution
A method where a turning ruler with diamonds is angled relative to the grinding worm's axis of rotation, allowing for efficient dressing of the outer peripheral surface by moving the grinding worm tangentially along a shorter path, enabling precise diameter determination and optimized cooling, reducing the length of the dressing process and cooling requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dressing bar corresponding to the desired envelope curve and at least as long as the grinding worm is used, then the entire surface can be ground simultaneously, but the dressing bar becomes very complex and requires excessive cooling
Solution Approach 1:
The invention divides the dressing operation into two separate operations: flank dressing and outer peripheral surface dressing. This segmentation allows each dressing tool to be simpler and shorter, avoiding the need for a single complex long dressing bar that would require excessive cooling
Solution Approach 2:
The invention introduces angular positioning (dimensional change) by tilting the grinding worm axis by angle φ relative to the overturning ruler. This dimensional approach allows the overturning ruler to be shorter than the grinding worm length while still achieving complete coverage through the angular relationship, where the required length corresponds to the grinding worm length multiplied by cos(φ)
2Manufacturing precision
If a long dressing bar is used to cover the entire grinding worm, then complete surface coverage is achieved, but cooling requirements increase significantly
Solution Approach 1:
The cooling requirement is segmented by separating the dressing operations. Only the narrow contact area between the overturning ruler and grinding worm requires cooling, rather than cooling the entire length of a long dressing bar, significantly reducing cooling energy consumption
Solution Approach 2:
Cooling is applied locally only where needed - in the narrow contact area between the overturning ruler and grinding worm - rather than applying cooling along the entire length of the dressing bar, optimizing cooling efficiency and reducing energy consumption
3Manufacturing precision
If precise alignment and diameter measurement are performed before dressing, then dressing accuracy is improved, but the process time and resource consumption increase
Solution Approach 1:
The diameter measurement is performed as a preliminary action before the dressing operation, allowing the optimal rotational speed to be calculated and set in advance. This preliminary measurement enables automatic setting of parameters, reducing manual intervention time and streamlining the overall process
Solution Approach 2:
The measurement of the grinding worm diameter provides feedback that is used to automatically determine and set the optimal rotational speed for the dressing operation. This feedback mechanism ensures precise dressing while minimizing manual adjustment time and resource consumption
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
This method simplifies the dressing process, reduces time and resource consumption, allows for automatic setting of optimal rotational speed, and ensures uniform wear and efficient cooling by determining the grinding worm's diameter and optimizing the dressing process.
Implementation Method 1
a turning ruler is arranged at an angle φ to the axis of rotation of the grinding worm and the rotating grinding worm is moved relative to the turning ruler when it comes into contact with the turning ruler. The turning ruler is a smooth ruler fitted with diamonds
Implementation Method 2
an oil nozzle is moved with the grinding worm over the contact point of the grinding worm with the overturning ruler, so that oil cooling is only carried out over a narrow area
Data Source
Figure 1A~1B
Figure 1C~2A
Figure 2B~2C
AI summary
A method for dressing a grinding screw (1) or grinding wheel rotating about an axis of rotation (2) for grinding a gear or gear-like workpiece with a tooth-shaped profile, which consists at least partially of a dressable abrasive material, in which, for dressing, a cutting edge is moved towards the flanks of the tooth-shaped profile of the grinding screw (1), dressed, and then moved away from the grinding screw (1) after dressing. After dressing, for over-turning the grinding screw (1), an over-turning guide (3) is arranged at an angle ϕ to the axis of rotation (2) of the grinding screw (1), and the rotating grinding screw (1) is moved relative to the over-turning guide (3) upon contact with it. The over-turning guide (3) is also used to determine the diameter of the grinding screw (1).