AO202
AO202
AO202
《聯(lián)系人；歐先生》
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《傳真：0592-5917519》
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《QQ ：2479261344》
《QQ郵箱：2479261344@qq.com》
測量工具有標(biāo)準(zhǔn)轉(zhuǎn)臺、角度多面體、圓光柵及平行光管(準(zhǔn)直儀)等，可根據(jù)具體情況選用。測量方法是使工作臺正向(或反向)轉(zhuǎn)一個角度并停止、鎖緊、定位，以此位置作為基準(zhǔn)，然后向同方向快速轉(zhuǎn)動工作臺，每隔30鎖緊定位，進(jìn)行測量。正向轉(zhuǎn)和反向轉(zhuǎn)各測量一周，各定位位置的實際轉(zhuǎn)角與理論值(指令值)之差的最大值為分度誤差。如果是數(shù)控回轉(zhuǎn)工作臺，應(yīng)以每30為一個目標(biāo)位置，對于每個目標(biāo)位置從正、反兩個方向進(jìn)行快速定位7次，實際達(dá)到位置與目標(biāo)位置之差即位置偏差，再按GB10931-89《數(shù)字控制機(jī)床位置精度的評定方法》規(guī)定的方法計算出平均位置偏差和標(biāo)準(zhǔn)偏差，所有平均位置偏差與標(biāo)準(zhǔn)偏差的最大值和與所有平均位置偏差與標(biāo)準(zhǔn)偏差的最小值的和之差值，就是數(shù)控回轉(zhuǎn)工作臺的定位精度誤差。
考慮干式變壓器到實際使用要求，一般對0、90、180、270等幾個直角等分點(diǎn)進(jìn)行重點(diǎn)測量，要求這些點(diǎn)的精度較其他角度位置提高一個等級。
6、回轉(zhuǎn)工作臺的重復(fù)分度精度檢測
測量方法是在回轉(zhuǎn)工作臺的一周內(nèi)任選三個位置重復(fù)定位3次，分別在正、反方向轉(zhuǎn)動下進(jìn)行檢測。所有讀數(shù)值中與相應(yīng)位置的理論值之差的最大值分度精度。如果是數(shù)控回轉(zhuǎn)工作臺，要以每30取一個測量點(diǎn)作為目標(biāo)位置，分別對各目標(biāo)位置從正、反兩個方向進(jìn)行5次快速定位，測出實際到達(dá)的位置與目標(biāo)位置之差值，即位置偏差，再按GB10931-89規(guī)定的方法計算出標(biāo)準(zhǔn)偏差，各測量點(diǎn)的標(biāo)準(zhǔn)偏差中最大值的6倍，就是數(shù)控回轉(zhuǎn)工作臺的重復(fù)分度精度。
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