萬(wàn)能材料試驗(yàn)機(jī)的檢定辦法,依據(jù)實(shí)驗(yàn)機(jī)被檢區(qū)間的力值,將相應(yīng)力值的規(guī)范拉力試樣裝夾在實(shí)驗(yàn)機(jī)上,按GB/T228-2002規(guī)范規(guī)則的速度讓實(shí)驗(yàn)機(jī)對(duì)規(guī)范拉力試樣進(jìn)行拉伸,當(dāng)規(guī)范拉力試樣處于拉伸狀況時(shí)在其上裝上引伸計(jì)或貼上應(yīng)變片,讓拉力實(shí)驗(yàn)機(jī)持續(xù)對(duì)規(guī)范拉力試樣進(jìn)行拉伸,引伸計(jì)或應(yīng)變片將規(guī)范拉力試樣的伸長(zhǎng)量顯示出來(lái),將伸長(zhǎng)量換算為拉力值,再與拉力實(shí)驗(yàn)機(jī)度盤(pán)上與規(guī)范拉力試樣一樣的力值點(diǎn)進(jìn)行比照,依據(jù)比對(duì)值的差來(lái)斷定實(shí)驗(yàn)機(jī)技能狀況及精度。
本辦法使用胡克定律,依據(jù)規(guī)范拉力試樣的伸長(zhǎng)量換算為力值與實(shí)驗(yàn)機(jī)度盤(pán)力值進(jìn)行比照,來(lái)斷定實(shí)驗(yàn)機(jī)的精度。該辦法極大的簡(jiǎn)化了檢定的操作過(guò)程,對(duì)實(shí)驗(yàn)機(jī)初始拉伸狀況的平常檢定帶來(lái)極大便利和規(guī)范化。
萬(wàn)能材料試驗(yàn)機(jī)檢定辦法的特征:
萬(wàn)能材料試驗(yàn)機(jī)的檢定辦法,其特征在于,首要依據(jù)被檢區(qū)間拉力實(shí)驗(yàn)機(jī)的力值,挑選規(guī)范拉力試樣,規(guī)范拉力試樣的力值為該區(qū)間滿量程力值的60%~90%之間挑選,將規(guī)范拉力試樣裝夾在拉力實(shí)驗(yàn)機(jī)上,按GB/T228-2002規(guī)范規(guī)則的速度讓拉力實(shí)驗(yàn)機(jī)對(duì)規(guī)范拉力試樣進(jìn)行拉伸,當(dāng)拉力實(shí)驗(yàn)機(jī)的指針稍有搖擺時(shí)馬上中止拉伸,即規(guī)范拉力試樣處于拉伸狀況,此刻在規(guī)范拉力試樣上裝上引伸計(jì)或貼上應(yīng)變片,按GB/T228-2002規(guī)范規(guī)則的速度讓拉力實(shí)驗(yàn)機(jī)持續(xù)對(duì)規(guī)范拉力試樣進(jìn)行拉伸,引伸計(jì)或應(yīng)變片將規(guī)范拉力試樣的伸長(zhǎng)量顯示出來(lái),依據(jù)胡克定律,將伸長(zhǎng)量換算為拉力值,再與拉力實(shí)驗(yàn)機(jī)度盤(pán)上與規(guī)范拉力試樣一樣的力值點(diǎn)進(jìn)行比照,依據(jù)比對(duì)值的差來(lái)斷定實(shí)驗(yàn)機(jī)技能狀況及精度。