摘 要：提出了在萬(wàn)能工具顯微鏡上采用坐標(biāo)平移和旋轉(zhuǎn)的“旋轉(zhuǎn)法”代替“弓高弦長(zhǎng)法”在圓弧輪廓上進(jìn)行均勻、多次選點(diǎn)，測(cè)量大半徑短圓弧樣板。簡(jiǎn)要介紹了“旋轉(zhuǎn)法”的原理、測(cè)量方法，并應(yīng)用“旋轉(zhuǎn)法”實(shí)例測(cè)量進(jìn)行誤差分析，從而驗(yàn)證了“旋轉(zhuǎn)法”能減小形狀誤差對(duì)測(cè)量半徑精度的影響，也優(yōu)于“弓高弦長(zhǎng)法”的測(cè)量精度，是具體測(cè)量大半徑圓弧樣板活動(dòng)中的一個(gè)實(shí)用方法。
關(guān)鍵詞：坐標(biāo)平移旋轉(zhuǎn)；大半徑短圓弧樣板；測(cè)量及計(jì)算；萬(wàn)能工具顯微鏡
中圖分類號(hào)：TH821 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1672-4984（2007）04-0056-04
Revolving measurement of large radius arc template
LIU Shu-lin1， WU Chang-yan2， LI Jian-chuan3
（1.No.26 Institute of China Electronics Technology Collective Corporation，Chongqing 400060，China；
2.Dajiang Industry Group，Chongqing 400060，China；
3.National Institute of Measarement and Festing Technology，Chengdu 610061 China）
Abstract: Taking the place of bowstring measuring, revolving method which realizes measurement through translating and revolving of coordinates on universal tool maker’s microscope can be used to measure large radius short arc template by selecting the measuring point along the arc uniformly and repeatedly. Principle, procedure and error analysis example of revolving method were briefly introduced. Those results showed effects of precision in measuring arc radius from form error could be reduced, and the precision of this method was much better than that of bowstring method. Thus, revolving method is an idea choice for measuring large radius arc template.
Key words: Coordinates translation and rotation; Large radius short are template; Measurement and calculation; Universal tool maker’s microscope
