Ball Screw Super-Finishing With Abrasive Belt Thread Tool
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Solution Overview
Problem
Conventional methods for finishing ball screw threads are unreliable, inaccurate, and expensive, failing to meet surface finish requirements like Tp (Plateau Ratios) for maintaining a lubricating film, and often require manual intervention or expensive precision machinery.
Innovation Solution
An assembly comprising an apparatus with a holder, a replaceable finishing tool having complementary threads, and a drive mechanism, along with an abrasive belt, that facilitates angular displacement of the ball screw for super-finishing operations, eliminating human intervention and costly machinery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual polishing is used to finish ball screw threads, then human intervention allows flexibility in operation, but reliability and accuracy deteriorate due to inconsistency and skill dependency
Solution Approach 1:
The apparatus enables self-service automation where the ball screw is automatically fed through the finishing tool via a drive mechanism, eliminating the need for manual handling while maintaining consistent processing. The system serves itself by automatically positioning and processing multiple threads without human intervention.
Solution Approach 2:
Manual mechanical polishing operations are replaced with an automated mechanical system comprising a holder, drive mechanism, and finishing tool. The mechanical substitution transforms unreliable manual operations into reliable automated processes while preserving the essential finishing function.
2Manufacturing precision
If precision machining or grinding methods are used to finish ball screw threads, then manufacturing accuracy is improved, but cost deteriorates due to expensive equipment and processes
Solution Approach 1:
The invention uses a replaceable finishing tool with abrasive elements that can be easily replaced when worn, instead of investing in expensive precision grinding equipment. The finishing tool serves as a cost-effective alternative that achieves required surface finish without the high capital investment of precision machining centers.
Solution Approach 2:
The invention changes the processing parameters by using abrasive belts or tapes with varying grit sizes and applying controlled pressure through the finishing tool. This allows achieving different surface finish qualities by adjusting abrasive parameters rather than investing in multiple precision machining capabilities.
3Manufacturing precision
If conventional finishing tools process each ball screw thread individually, then processing accuracy is maintained, but productivity deteriorates due to sequential processing of multiple threads
Solution Approach 1:
The finishing tool is designed to process multiple threads simultaneously by combining multiple abrasive elements or positioning a single abrasive element to contact multiple threads at once. This merging of processing operations maintains accuracy while dramatically increasing productivity compared to sequential individual thread processing.
Solution Approach 2:
The drive mechanism enables continuous rotation of the ball screw holder, allowing the finishing tool to process multiple threads in continuous motion without stopping between threads. This continuity eliminates idle time between individual thread operations and maintains consistent finishing quality throughout the process.
4Ease of manufacture
If replaceable finishing tools with abrasive belts are used, then ease of manufacture is improved by eliminating expensive machinery, but device complexity increases due to tool replacement and setup requirements
Solution Approach 1:
The finishing tool is segmented into modular components including the tool body, abrasive belt/tape, and mounting mechanism. This segmentation allows easy replacement of just the abrasive element without replacing the entire tool assembly, reducing setup complexity while maintaining cost-effectiveness.
Solution Approach 2:
Abrasive belts or tapes are pre-mounted on the finishing tool during setup, and the tool is pre-positioned in the holder before processing begins. This preliminary preparation reduces operational complexity during actual finishing operations, making the system easier to use despite the replaceable tool design.
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 apparatus achieves superior speed, reliability, and cost-effectiveness in finishing ball screw threads, ensuring high surface finish quality without manual intervention or expensive equipment.
Implementation Method 1
an abrasive belt received within the finishing tool (10) such that the abrasive belt (20) forms an interface between the section of threads (10B) of the finishing tool (10) and the threads (40A) of the ball screw (40)
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
The present disclosure relates to the field of manufacturing technology. In particular, the present disclosure relates to an apparatus for performing finishing operation on a ball screw. The apparatus of the present disclosure operates with superior speed, reliability, and efficiency. Furthermore, the apparatus of the present disclosure is simple and cost effective. The apparatus disclosed in the present disclosure can be used for performing super-finishing operations on a ball screw or any other kind of a screw.