Grinding Roll Reconditioning via Partial Turning and Bore Deepening
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Solution Overview
Problem
The reprocessing of used grinding rollers with hard surface materials is labor-intensive and costly due to the need for complete surface turning and re-boring, which is inefficient and time-consuming, especially when profile bodies are not completely worn out.
Innovation Solution
The method involves partial material removal of the roller surface to a diameter larger than the existing boreholes, deepening existing bores, and/or creating new bores, and inserting shorter profile bodies to extend the service life and reduce reprocessing time and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface of the roller body is completely turned off to restore cylindrical shape, then the roller surface can be reused, but the reprocessing requires considerable effort and time due to the high hardness of the surface material
Solution Approach 1:
Instead of completely turning off the entire roller surface, the invention applies partial turning only to the worn areas where profile bodies have been removed. This partial action approach significantly reduces the reprocessing time and effort while still restoring the cylindrical shape where needed, resolving the contradiction between surface reusability and reprocessing time.
2Adaptability or versatility
If new bores are made and new profile bodies are inserted into new bores, then the roller can be re-equipped with profile bodies, but the complete turning of the surface requires considerable effort due to high hardness
Solution Approach 1:
The invention segments the reprocessing operation into two independent parts: (1) partial turning of only the worn surface areas, and (2) creation of new bores and insertion of profile bodies. This segmentation allows the boring and profile insertion operations to proceed independently without requiring complete surface turning, thereby improving ease of manufacture while maintaining full re-equipping capability.
3Productivity
If the roller is used until a substantial part of all profile bodies is completely worn out, then the roller has been fully utilized, but the reprocessing becomes extremely time-consuming and costly
Solution Approach 1:
The invention enables preliminary replacement of worn profile bodies before the entire roller surface is completely worn down. By allowing selective removal and replacement of individual profile bodies and performing partial surface turning only where needed, the system extends the usable life of the roller while avoiding the extremely time-consuming complete reprocessing that would be required if the roller were used until total wear occurred.
Data Source
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AI summary
The invention relates to a method for reconditioning a used grinding roll of a high-pressure bed grinding mill. In said method, the surface of the rolling body is turned by a certain degree after removing the worn profiled members, whereupon the existing bores can be deepened to a depth that is sufficient for receiving new profiled members or new bores can be created according to a new bore pattern. New profiled members are then inserted into the bores. The inventive method allows a used grinding roll to be reconditioned in a particularly time-saving manner while economizing material.