Polishing Apparatus Transfer Unit Centering Guide
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Solution Overview
Problem
Conventional polishing apparatuses cause work pieces to vibrate and shift from the center during transfer, leading to potential damage or breakage during the centering and polishing processes.
Innovation Solution
A polishing apparatus with a transfer unit comprising a guide member with tapered pins for centering, a vertically moving mounting table with a female tapered face, and an elastic support mechanism to securely transfer the work piece to the top ring without displacing it from the center, ensuring precise polishing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pusher stage is moved upward to transfer the work piece to the top ring, then the work piece can be transferred to the top ring, but the centered work piece is vibrated and easily moved from the center
Solution Approach 1:
The work piece is centered on the pusher stage before the upward movement begins. The guide member with tapered guide face performs centering in advance, so that when the pusher stage moves upward, the work piece is already in the correct position and less susceptible to displacement
Solution Approach 2:
The guide member acts as an intermediary between the pusher stage and the top ring. It provides a tapered guide face that maintains the work piece's centering during the transfer process, mediating the transition without allowing displacement
2Manufacturing precision
If the work piece is moved from the pusher stage to the female-tapered guide face for centering, then the work piece can be centered, but the work piece will be easily moved or shifted from the center during pusher stage movement
Solution Approach 1:
Centering is performed in advance on the pusher stage using the guide member, before any upward movement occurs. This preliminary centering ensures the work piece is securely positioned and less likely to shift during subsequent movements
Solution Approach 2:
The guide member's tapered face provides a counteracting force that prevents the work piece from shifting during transfer. The geometry of the tapered face is designed to resist radial displacement, providing preliminary anti-action against potential position instability
Data Source
AI summary
The polishing apparatus is capable of transferring a work piece to a top ring without moving the work piece from the center and capable of precisely polishing the work piece. The polishing apparatus has a transfer unit for transferring the work piece to the top ring. The transfer unit comprises: a guide member having a receiving section, which centers the work piece; a mounting table vertically moving with respect to the guide member, the mounting table having a mounting section, which receives the centered work piece; and a supporting mechanism supporting the mounting table and allowing the mounting table to move downward. The mounting table is relatively moved close to the top ring and presses the work piece onto the top ring so as to transfer the work piece to the top ring.