本文選題：楔橫軋 + 螺紋軸��； 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年05期

【摘要】：考慮到模具型腔與軋件變形區(qū)的空間關(guān)系,利用軋件瞬時(shí)螺旋半徑與螺距關(guān)系,推導(dǎo)模具螺旋升角表達(dá)式,并繪制模具螺旋升角軌跡曲線。在H630楔橫軋機(jī)上進(jìn)行2種螺旋升角工況的螺紋軋制實(shí)驗(yàn),使用三坐標(biāo)測(cè)量?jī)x對(duì)軋件進(jìn)行精確測(cè)量,分析2種工況下軋件的齒高和螺距的成形特點(diǎn)。研究結(jié)果表明:在定值螺旋升角工況下,軋件最大齒高和螺距相對(duì)誤差分別達(dá)到6.88%和3.50%,軋件齒形端部出現(xiàn)明顯螺旋痕;在本文推導(dǎo)的變螺旋升角工況下,制件的齒高和螺距相對(duì)誤差分別為2.51%和1.42%,并且螺紋飽滿、均勻性較好。本研究提供的螺旋升角求解方法能夠獲得質(zhì)量較高的螺紋,該方法為楔橫軋螺紋軸精確成形提供理論依據(jù)。
[Abstract]:Considering the spatial relationship between the die cavity and the deformation zone of the workpiece, the expression of the spiral rising angle of the die is derived by using the instantaneous spiral radius and the pitch of the workpiece, and the curve of the spiral rising angle of the die is drawn. The screw rolling experiments of two helical lifting angle conditions were carried out on H630 cross wedge rolling mill. The three coordinate measuring instrument was used to accurately measure the workpiece, and the forming characteristics of the tooth height and pitch of the workpiece under the two conditions were analyzed. The results show that the relative errors of the maximum tooth height and pitch are 6.88% and 3.50% respectively, and the spiral marks appear at the end of the tooth profile of the workpiece under the condition of constant spiral rising angle, and under the variable helical rising angle condition deduced in this paper, the relative error of the maximum tooth height and pitch is 6.88% and 3.50% respectively. The relative errors of tooth height and pitch are 2.51% and 1.42% respectively, and the thread is full and uniform. The method provided in this paper can obtain high quality thread, which can provide theoretical basis for precise forming of cross wedge rolling thread shaft.
【作者單位】： 河北科技大學(xué)材料科學(xué)與工程學(xué)院河北省材料近凈成形技術(shù)重點(diǎn)實(shí)驗(yàn)室;北京科技大學(xué)機(jī)械工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51475139) 石家莊市科學(xué)技術(shù)局科技計(jì)劃項(xiàng)目(141081321A)~~
【分類號(hào)】：TG335.19

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