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- Study on the Technology and Limit Drawing Ratio of Magnesium sheet Stamping 镁合金板材冲压成形工艺及极限拉延比研究
- Keywords ZE10 magnesium alloy;deep drawing;limited drawing ratio;wrinkling;drawability; ZE10镁合金;热拉深;极限拉深比;起皱;拉深性能;
- Keywords Strain hardening index;Limiting draw ratio;Sheetmetal; 材料强化指数;极限压延比;板材;
- limited drawing ratio 极限拉深比
- limit drawing ratio 极限拉深比
- Keywords AZ31 magnesium alloy;deep drawability;forming temperature;limiting drawing ratio; AZ31镁合金;拉深性能;成形温度;极限拉深比;
- Keywords deep drawing lubricator;comprehensive assessment;sonde procedure;maximum drawing force;limiting drawing ratio; 拉深润滑剂;综合评定;探针法;最大拉深力;极限拉深比;
- Keywords sheet metal forming;nlank holder force（BHF）;limiting drawing ratio（LDR）;fuzzy; 板料冲压成型;压边力（BHF）;极限拉深比;模糊控制;
- Keywords magnesium alloy AZ31B;deep drawing forming;forming temperature;deep drawing speed;blank holder force;limiting drawing ratio（LDR）; AZ31B镁合金;拉深成形;成形温度;拉深速度;压边力;极限拉深比;
- The axial drawing ratio and hoop extension ratio should be properly matched. 轴向拉伸比和环向扩张比要合理匹配。
- limiting drawing ratio 极限拉延比,极限拉延程度
- Compared with even die-drawing, camber die-drawing’s limit drawing coefficient is detracted, so efficiency is increased. 曲面凹模拉深与平端面凹模拉深相比，降低了极限拉深系数，减少工序、提高了效率，降低了成本。
- Hollowness of the hollow polyester UDY increased after cool drawing,decreased after heat drawing, and was down a little while increasing drawing ratio. 冷拉伸后，涤纶未拉伸丝的中空度变大，热拉伸则相反；随着拉伸倍数的提高，涤纶未拉伸丝的中空度有所下降。
- The practical experiments showed that fiber spinnability was optimized when spinneret negative draw ratio was -73%. 工业化试验表明:当喷丝头负拉伸率为-73%25时,纤维可纺性达到最佳状态。
- The required specimens were manufactured successfully and larger drawing ratio curves of hydroforming are obtained by experiments. 最后通过实验成形出合格零件，获得了大拉深比矩形抛物面反光罩的成形曲线。
- PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter. 采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试,并将其结果进行对比。
- For PET staple dry drawing process, point\|of\|stretch shift was primarily caused by the factors of draw ratio, drawing speed, temperature and pretension. 涤纶短纤维干式拉伸工艺拉伸点的移动主要因拉伸倍数、拉伸速度、温度、预张力等因素而引起。
- The test results showed that the influence of drawing ratio,speed and temperature on the tension,tension fluctuation and irregularity of the fiber were obvious. 结果表明，拉伸比、拉伸速度和拉伸温度对纤维张力、张力波动和不匀率均存在着明显的影响。
- Abstract: PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter. 摘 要: 采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。
- The super molecular structure of UHMWPE fibers changes with the increasing draw ratio, which are measured by WAXD, DSC, SAXS and Raman spectroscopy. 用WAXD、DSC、SAXS及拉曼光谱等测试手段,研究了拉伸过程中UHMWPE纤维的超分子结构变化。
