Ball Screw Polishing via Dual Oscillation
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Solution Overview
Problem
Conventional ball screw polishing methods fail to achieve good surface roughness in the ball groove, despite its design for rolling balls.
Innovation Solution
A ball screw polishing method and device that rotatably retains the screw shaft, synchronizes the rotation and movement of the polishing tape with the screw shaft, and incorporates linear oscillation mechanisms to ensure precise contact and polishing of the ball groove, using a turnback roll for tangential guidance and vertical/horizontal oscillation to enhance polishing precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional polishing method with polishing tape is used, then the ball groove can be polished, but the surface roughness cannot be improved sufficiently
Solution Approach 1:
The patent applies linear oscillation to the pressure contacting roll in two directions: tangential direction of the ball groove and radial direction toward both inner side surfaces. This mechanical vibration creates complex relative motion between the polishing tape and ball groove, significantly improving surface roughness by preventing tape adherence and enhancing polishing uniformity.
Solution Approach 2:
The patent transforms the static pressure contacting roll into a dynamically oscillating component that moves in multiple directions. The linear oscillation mechanism enables the roll to adjust its position dynamically during polishing, creating variable contact conditions that improve surface finish while maintaining device feasibility.
2Productivity
If the polishing tape is transferred continuously or intermittently, then the polishing process can be maintained, but the synchronization with screw shaft rotation becomes complex
Solution Approach 1:
The patent employs speed synchronizing means that monitors and coordinates the rotation speed of the screw shaft with the transfer speed of the polishing tape. This feedback mechanism ensures that the tape speed matches the screw shaft rotation, maintaining optimal polishing conditions while allowing continuous or intermittent operation for improved productivity.
Solution Approach 2:
The pressure contacting roll serves multiple functions: it applies pressure to the polishing tape, guides the tape in tangential direction, and provides linear oscillation in two directions. This multi-functionality reduces the need for separate mechanisms, simplifying the overall device while maintaining synchronization capability.
3Manufacturing precision
If the pressure contacting roll is made to oscillate in two directions, then polishing precision is improved, but the device structure becomes more complex
Solution Approach 1:
The patent combines two linear oscillation mechanisms into a single integrated system that oscillates the pressure contacting roll in both tangential and radial directions simultaneously. This merging of oscillation functions into one coordinated mechanism achieves complex polishing motion while avoiding the need for completely separate oscillation systems, thus improving polishing precision with manageable device complexity.
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
Improves polishing precision and surface roughness of the ball groove, simplifies the device structure, and enhances polishing workability by ensuring continuous or intermittent transfer and synchronized motion of the polishing tape.
Implementation Method 1
polishing the ball groove by the polishing tape on the basis of a complex motion of the rotation of the screw shaft, the transfer of the polishing tape, the linear oscillating motion in two directions including the tangential direction of the ball groove and the direction of the rotating axis line toward both inner side surfaces of the ball groove
Data Source
AI summary
The invention has a turnback roll which can transfer and guide a polishing tap in a tangential direction of a pressure contacting roll, a vertical oscillation mechanism which linearly oscillates the pressure contacting roll in a tangential direction of a ball groove while being orthogonal to a rotating axis line, and a horizontal oscillation mechanism which linearly oscillates the pressure contacting roll in a direction of a rotating axis line toward both inner side surfaces of the ball groove. The ball groove can be securely polished by the polishing tape on the basis of the continuous or intermittent transfer of the polishing tape and the linear oscillating motion of the ball groove. It is possible to improve a polishing precision, it is possible to improve a surface roughness of the ball groove and it is possible to improve a polishing workability of the ball groove.