Worm Tooth Polishing Tape Control for Better Surface Roughness
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Solution Overview
Problem
Conventional worm polishing devices using grinding wheels are limited in improving the surface roughness of worm tooth faces, which are in sliding contact with worm wheels.
Innovation Solution
A worm polishing method and device that employs a polishing tape, where the worm is rotated and the tape is transferred and swung tangentially, synchronized with the worm's rotation, using a pressure contact roll with a tapered edge to form a V-shape, allowing secure pressure contact and improved polishing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a grinding wheel is used to polish the worm tooth face, then the polishing process can be performed, but the surface roughness of the tooth face cannot be sufficiently improved
Solution Approach 1:
The invention changes the fundamental polishing parameter from using a rigid grinding wheel to using a flexible polishing tape, which can conform to the tooth face geometry and provide better surface contact for improved roughness
Solution Approach 2:
The polishing tape acts as an intermediary between the grinding wheel concept and the tooth face, providing a material that can achieve the desired surface roughness while maintaining the polishing function
2Productivity
If the polishing tape is transferred continuously, then the polishing efficiency is improved, but the synchronization with worm rotation becomes difficult to control
Solution Approach 1:
The invention uses a feedback control system where the tape transfer mechanism is synchronized with the worm rotation through a control unit that monitors and adjusts the tape feed rate based on the worm's rotational position and speed
Solution Approach 2:
The system dynamically adjusts the tape transfer speed to match the worm rotation, allowing the tape to be continuously fed while maintaining precise synchronization with the rotating worm throughout the polishing process
3Force
If the pressure contact roll applies high pressure to the polishing tape, then the polishing force is improved, but the tape may deform or detach from the tooth space
Solution Approach 1:
The pressure contact roll is designed with a specific surface geometry that distributes the polishing pressure locally where needed on the tooth face, rather than applying uniform pressure across the entire tape width, thereby maintaining tape stability while providing sufficient polishing force
Solution Approach 2:
The pressure contact roll has a curved or tapered peripheral edge that conforms to the tooth space geometry, allowing the polishing tape to be securely held in the tooth space while applying controlled pressure for effective polishing without causing tape deformation or detachment
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 enhances the surface roughness and workability of worm tooth faces by ensuring precise contact and synchronized motion, improving polishing precision and accuracy.
Implementation Method 1
polishing is carried out with a polishing tape T
Implementation Method 2
the polishing tape is inserted into the tooth space B of the worm by a pressure contact roll R
Data Source
AI summary
Loopback rolls which can transfer and guide a polishing tape (T) along a perimeter of a pressure contact roll (R) is provided, the pressure contact roll having a tapered peripheral edge having a top edge and a pair of slant edge faces formed on a periphery of the pressure contact roll, by which the polishing tape can be bent into a substantially V-shape in cross section, and a switchable pressure contact mechanism is switchably provided which pressure contacts each of bent portions of the polishing tape, which is bent into the substantially V-shape in cross section by the tapered peripheral edge, to one tooth face (B1) or the other tooth face of a worm.