English  |  正體中文  |  简体中文  |  Items with full text/Total items : 889/889 (100%)
Visitors : 14653046      Online Users : 11
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/251


    Title: 進給系統靜止下自然冷卻對熱變位之影響;Effect of natural cooling on the thermal deformation of a feed drive system
    Authors: 黃振紘;HUANG, JEN-HUNG
    Contributors: 機械工程系研究所
    Keywords: 自然冷卻;進給系統;natural cooling;feed drive system
    Date: 2017
    Issue Date: 2019-07-17
    Publisher: 機械工程系研究所
    Abstract: 本研究量測進給系統量測之溫升、定位精度及軸向總變形量,並改變載台停止位置與螺桿溫升分布,以瞭解進給系統靜止下載台停止在不同位置與溫度分布對螺桿溫降及熱變位之影響,藉以改善工具機之滾珠螺桿靜止一段時間後的熱補償誤差。 溫升量測系統中,本研究在進給系統量測機台前後軸承座內部及表面溫升、聯軸器溫升、螺帽法蘭內部溫升、載台內部溫升、靜止下螺桿不同位置的溫升,以瞭解機台的溫升分布情形。定位精度量測系統中,利用雷射干涉儀量測進給系統螺桿溫降過程中定位精度的變化。螺桿軸向總變形量量測系統中,利用渦電流量測進給系統螺桿溫降過程中軸向變形量的變化。 當螺桿溫升均勻分布時,螺桿溫升越高,螺桿冷卻越快,且螺帽停止於行程中點時,整體螺桿冷卻最快;螺帽停止於前後端點時,行程區冷卻變形有較佳的線性度,且螺桿停止於靠近馬達及前軸承端之行程,可預防馬達及前軸承餘熱影響行程區之冷卻。當螺桿溫升非均勻分布,螺帽停止位置非常重要,當螺帽停止於非加工區且螺帽溫度大於螺桿溫度,則螺帽附近之螺桿溫度在機台停止後仍會繼續溫升。
    This study measures the temperature rise, positioning accuracy and total axial deformation of a feed drive to better understand the effects of the stage position and initial temperature distribution on the temperature drop and deformation during cooling process. By doing so, this study improves the thermal compensation of the feed drives under cooling condition. In the temperature measurement system, this work measures the temperatures at the internal locations of the nut and the internal stage, the internal locations and the surfaces of the rear and front bearing housings, and different axial positions of the ball screw to better understand the temperature distribution of the components. In addition, this work measures the position accuracy and axial deformation of the ball screw with a laser interferometer and inductive gauging sensors. Measured results show that, when the initial temperature is uniform, the ball screw cools at a higher rate with a higher initial temperature. In addition, when the nut rests at the middle of the ball screw, the ball screw also cools at a higher rate. When the nut rests at the front or the rear endpoints of the ball screw, the temperature distribution of the ball screw is linear. When the nut rests at a location near the front bearing, the nut prevents the transfer of the waste heat from the motor and front bearing to the ball screw. When the initial temperature is non-uniform, the resting position of the nut is important. When the nut rests within the non-processing zone, the nut heats up the region of the ball screw near the nut.
    Appears in Collections:[機械工程學系] 學位論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML570View/Open


    All items in CCUR are protected by copyright, with all rights reserved.


    版權聲明 © 國立中正大學圖書館網頁內容著作權屬國立中正大學圖書館

    隱私權及資訊安全政策

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback