發(fā)布時(shí)間：2019-02-13 16:08

【摘要】：針對(duì)傳統(tǒng)密封方法在澆注光彈性模型時(shí)容易導(dǎo)致澆注液泄漏和模型尺寸誤差大的問題,提出一種新的硅橡膠陰模密封方法。該方法采用與陰模相同的密封材料和固化工藝進(jìn)行密封。齒輪光彈性模型的澆注實(shí)例表明,相同材料和固化工藝的采用使密封層與陰模成為一個(gè)整體,在不同溫度和氣壓環(huán)境下均不會(huì)出現(xiàn)分離,有效避免了澆注液的滲漏;密封層厚度為陰模壁體最薄處的0.5~1.5倍,緊固力小,使模型各方向收縮膨脹均勻,降低了模型的附加變形。采用新密封方法澆注得到的光彈性模型無缺料現(xiàn)象,制造的齒輪內(nèi)圓直徑和高度的最大誤差均小于2%,模型尺寸精度滿足光彈性試驗(yàn)要求。
[Abstract]:A new sealing method of silicone rubber negative die is proposed to solve the problem that the traditional sealing method can easily lead to the leakage of pouring fluid and the large size error of the model when casting photoelastic model. This method uses the same sealing material and curing process as the negative die. The example of the pinion photoelastic model shows that the same material and curing technology make the sealing layer and the negative die as a whole and will not be separated under different temperature and pressure environment, which effectively avoids the leakage of the pouring liquid. The thickness of the sealing layer is 0.5 ~ 1.5 times that of the thinnest part of the die, and the fastening force is small, which makes the shrinkage and expansion of the model even and reduces the additional deformation of the model. The new sealing method is used to cast the photoelastic model. The maximum errors of the diameter and height of the inner circle are less than 2, and the precision of the model can meet the requirements of photoelastic test.
【作者單位】： 中國(guó)航空動(dòng)力機(jī)械研究所;航空發(fā)動(dòng)機(jī)振動(dòng)技術(shù)航空科技重點(diǎn)實(shí)驗(yàn)室;
【基金】：航空科學(xué)基金項(xiàng)目(20122108002)
【分類號(hào)】：TQ333.93;TB42

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