The results indicate that the influence of the metal mandrel is constant.
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2. 芯棒暴露和机械强度下降。
The core is exposed and mechanical strength is decreased.
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3. 引用的抛物线芯棒及孔型设计公式可供参考。
The formulas introduced for design of the parabolic mandrel and pass are worth referring to.
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4. 芯棒在工作中产生的主要失效形式是疲劳剥落。
The main inactive forms of core-rod are heat fatigue and touching fatigue peeling.
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5. 一种方法是使用空心坯，然后使用固定或浮动芯棒。
One way is to use a hollow billet and then use a fixed or floating mandrel.
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6. 本发明涉及一种铜铝管焊接接头、其制备方法及专用芯棒。
The invention relates to a Cu-Al pipe welding joint, a preparation method and a special core rod thereof.
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7. 提出了小型无缝钢管生产机组选用半浮动芯棒连轧工艺的优势。
Advantages of employment of semi-floating mandrel mill to produce small and medium tubes are elaborated.
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8. 用具有世界先进水平的限动芯棒连轧工艺和装备生产无缝钢管。
Seamless steel Pipe produced with retained mandrel continuous technology and equipment having the advanced world standard has made the quality of products reliably guaranteed.
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9. 目的测试电热蚊香液加热时间与芯棒中拟除虫菊酯残留量的关系。
Obiective Test the relationship between the heating time of electrothermal vaporizing liquid and the residues of pyrethroid in mandril.
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10. 本发明与现有技术相比，生产环境无污染，芯棒强度高，挥散均匀。
Compared with the prior art, the invention causes no pollution to the production environment, has high mandril strength and even volatility.
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11. 芯棒拉挤成型主要参数应根据树脂固化的“放热曲线”为基准加以确定。
The core bar form process should base on the heat curve of the colophony solidify.
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12. 由此，可广泛地适用作由曼内斯曼芯棒式无缝管轧机方式的无缝管的制造方法。
As a result, the method can be widely used as a method for manufacturing the seamless tube by a Mannesmann mandrel mill system.
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13. 天钢高线厂集卷站的环行分配器、双臂芯棒、集卷门、内芯棒等都采用液压传动。
The circular distributor, double-arm mandrel, coiler door and internal mandrel of the coiling station in the High-speed Wire Rod Mill are driven by the hydraulic systems.
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14. 本发明涉及一种金属轧制管的芯棒改进方法，具体地说是一种行星轧机用空芯棒。
The invention relates to an improvement method of a core rod of a metal rolled tube, in particular to a hollow core rod used for a planetary rolling mill.
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15. 文章分析了短芯棒拉拔管材时拉杆的受力，并对拉杆的尺寸设计提供了分析的依据。
The mechanical status of nutted rod in drawing pipe with short mandrel rod is analyzed, the analysis basis for the dimensions design of nutted rod offered.
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16. 实施后，解决了连轧孔型系统设计、优化数模运算等相关问题，提高了芯棒利用率。
The relative problems such as designing continuous rolling pass system and optimizing mathematical model operation are solved after practice and utilization rate of the mandrel is increased.
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17. 本文简要介绍了周期式二辊冷轧管机所使用的单锥度芯棒、双锥度芯棒及抛物线芯棒。
The paper gives a brief introduction to three types of mandrels used for the two-high pilger cold-rolling mill, namely, mono-cone mandrel, dual-cone mandrel and parabolic mandrel.
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18. H 13钢芯棒毛坯在调质热处理后的校正工序中发生断裂，宏观断裂面出现萘状断口。
After quenching and tempering, material H13 steel core bar was broken during alignment There are naphthalene fractures on macroscopical fractures surface.
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19. 当芯棒伸出量达到一定值后，随着芯棒伸出量的增大，起皱波纹高度极大值变化不明显。
The maximum height of wrinkling wave does not almost alter with the increase of the initial lead of the mandrel when the initial lead reached a fixed value.
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20. 安全脱模系统是为了解决NEPE推进剂装药发动机主芯棒脱模而研制的专用设备系统。
The safety demolding system is designed for main core demoulding from the NEPE high-energy rocket motor in safety.
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21. 结果电热蚊香液在加热后期芯棒中的拟除虫菊酯残留量增加400%，孔隙率降低45%。
Results Pyrethroid residue in mandril increased by 400% and porosity reduced by 45% after heating electrothermal vaporizing liquid.
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22. 本文依据中空容器的结构特点及注射吹塑成型机成型工艺特点，设计注射吹塑用型坯及芯棒。
In this article shapes of parisons and blowing mandrels for injection blow mouldings were designed according to the shapes of finished articles and the feature of injection blow moulding process.
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23. 对芯棒表面温度的控制策略进行初步探讨，提出引入梯度函数对进水量提前补偿修正的方案。
The control strategy for surface temperature of the core rod is investigated and the scheme of introducing advanced compensation on the quantity of inlet water by gradient function is stated.
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24. 介绍在无缝钢管生产中芯棒温度测控系统的组成及MODCELL多回路控制器的基本应用。
The composition of the temperature monitoring system for the core rod in seamless steel tube production and the basic application of MODCELL Multiple-Loop Controller are introduced.
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25. 电子凸轮能发出芯棒小车、荒管小车到达特定位置的信号，供各种自动化设备的协调配合之用。
The electronic CAM can issue the special position signal of mandrel bar carnage and billet tube carriage. These signals are used as the cooperation of various automatic equipments.
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26. 整个系统由可编程控制器、全数字式直流调速系统、芯棒断裂检测系统、管料跟踪系统等构成。
It includes programming logical controller, digital direct current adjustable rate system, steel wick sticks crackle detect system, steel pipe track system.
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27. 三酸腐蚀可以对异形型芯、芯棒的尺寸公差进行调整，以代替机械加工对公差调整的困难操作。
Acid corrosion could be used for tolerance adjustment of irregular core and core rod, replacing difficult operation of tolerance adjustment by machining.
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28. 芯棒是限动芯棒连轧钢管机组中最重要的热变形工具，其使用效果决定着钢管生产成本的高低。
Since the mandrel is the most critical thermal deformation operation tool for the retained mandrel pipe mill (MPM) process, its operation efficiency is decisive to steel tube operational cost.
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29. 芯棒是限动芯棒连轧钢管机组中最重要的热变形工具，其使用效果决定着钢管生产成本的高低。
Since the mandrel is the most critical thermal deformation operation tool for the retained mandrel pipe mill (MPM) process, its operation efficiency is decisive to steel tube operational cost.
