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国内某电子材料总厂用150万英磅从英国进口了一台西德制造的Kocks轧机机组,用于热轧经粉末烧结的高温金属钨材,随机进口的轧辊于1990年中用完,进口该机组时未同时引进配套轧辊的制造技术,由于钨材热轧温度为1600℃高温,加上高速轧制时的冲击力。要求轧辊具有中心韧性好和表面高温硬度优良的综合性能,本文总结国产化轧辊的研制过程。 相似文献
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国内某电子材料总厂用150万英磅从英国进口了一台西德制造的Kocks轧机机组,用于热轧经粉末烧结的高温金属铝材,随机进口的轧辊于1990年中用完,进口该机组时未同时引进配套轧辊的制造技术。由于钨材热轧温度为1600℃高温,加上高速轧制时的冲击力,要求轧辊具有中心韧性好和表面高温硬度优良的综合性能。本文总结国产化轧辊的研制过程。 相似文献
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阿塞尔轧管机轧辊材质与辊型的改进 总被引:1,自引:0,他引:1
介绍了大连得胜无缝钢管厂φ60mm轧管机组阿塞尔轧管机轧辊材质与辊型的改进情况。使用改进后的轧辊,增强了辊面的抗热疲劳性能,提高了产品的表面质量,降低了轧制压力,延长了轧辊与轧辊轴承的使用寿命。 相似文献
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介绍了青岛祥兴铜管有限公司对原Φ76mm焊管机组在轧辊开距、导向套孔径、飞锯夹紧装置、轧辊辊型构造等方面进行的改进。此改进扩大了机组的产品生产范围,实现了既能生产Φ76mm以下规格的焊管,又能生产Φ76~95mm焊管的目标。 相似文献
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前言焊管轧辊参数设计是直缝焊管生产中的重要环节。用手工计算轧辊参数,不但工作量大,而且设计的轧辊参数往往因人而异,致使轧辊厂很难根据钢管的规格和机组形式生产标准化、系列化的轧辊,因而不利于产品质量的提高和缩短加工周期。 相似文献
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对重力浇铸和离心浇铸轧辊进行了比较,指出离心复合轧辊具有组织均匀致密、硬度高且变化小、力学性能好、使用寿命长等优点。详细分析了PQF连轧管机组的轧辊失效原因,提出了预防轧辊失效的方法:加强轧辊检查,合理控制轧制节奏,预热轧辊,控制换辊周期等。 相似文献
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1 INTRODUCTIONItisnecessarytoevaluateperformance ,toana lyzeandtoestimatethemechanicalbehaviorofHCmillforusingitefficiently ,masteringthecharacteris ticofthe pressuretransversedistributionbetweenrolls,anddecreasingtherollsattritionwear.Largescalestudyonde… 相似文献
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Y. Saito T. Watanabe H. Utsunomiya 《Journal of Materials Engineering and Performance》1992,1(6):789-795
A new type of compact continuous mill called the “Satellite mill” has been developed to produce profiled metal strip from
flat strip. This mill consists of one large-diameter driven roll (central roll) and five smaller rolls (satellite rolls) arranged
along the periphery of the central roll. A strip is continuously rolled at five gaps between the central roll and the satellite
rolls. All rolls are driven at an equal roll peripheral speed to promote transverse metal flow or lateral spread. Guide shoes
are provided between the adjacent satellite rolls and are supported with two adjacent satellite rolls. They prevent a strip
from bulging or buckling. A test mill was constructed, and rolling experiments have been performed on the production of T-shaped
or U-shaped profiled aluminum strip. The deformation- load characteristics were investigated and compared with those of conventional
rolling. As a result, in the satellite mill rolling operation, elongation was suppressed. Lateral spread was enhanced, and
the profile of the product cross section was significantly improved. Consequently, the new rolling process was found to be
forming of profiled metal strip. 相似文献
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采用“三辊异径”工艺对热轧窄带钢轧机进行了改造,即在原二辊之间增加一被动小工作辊,轧件在小工作辊与原下工作辊之间通过,轧制压力可下降49%~62%,所轧带钢可减薄,且平直度和表面质量均很好。简介了该工艺的特点和生产情况以及经济效益。 相似文献
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Rolling of T-shaped profiled strip by the satellite mill 总被引:1,自引:0,他引:1
H. Utsunomiya Y. Saito T. Hayashi T. Sakai 《Journal of Materials Engineering and Performance》1997,6(3):319-325
A new type of compact mill called a “satellite mill” is used for producing T-shaped profiled strip from flat strip. The mill
comprises one large-diameter flat roll (central roll) and five smaller-diameter caliber rolls (satellite rolls) arranged along
the periphery of the central roll. The flat strip is continuously passed through the five gaps between the central roll and
the satellite rolls and formed into a T shape. All rolls are driven at an equal peripheral speed to restrain elongation of
strip and to promote transversal metal flow. A guide shoe is provided between each two adjacent satellite rolls to prevent
the strip from bulging out or buckling. Using aluminum as a model material, some rolling experiments were performed on the
mill. T-shaped profiled strips with a thickness ratio (thickness of thick part per thickness of thin part) as high as three
were rolled successfully. When deformation and force characteristics were investigated, it was found that, in comparison to
a conventional multipass caliber rolling, the elongation of the strip is suppressed and the filling ability is much improved. 相似文献
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The deflection of rolls of Sendzimir mill with double AS-U-Roll was simulated by finite element method(FEM). The influences of rolling pressure, strip width and rolls-assignment on rolls deflection were analyzed. The results show that the work roll deflection increases with the increase of rolling pressure and the reduction of work roll radius, but the rigid displacement of work roll slightly changes; the work roll end might appear negative displacement for the narrow strip width and high rolling pressure that might cause the contact of work rolls. The research results are significant for guiding production and theoretical analysis of the rolls system of Sendzimir mill. 相似文献
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辊间压痕是制约六辊铝板带冷轧机实现中间辊抽动功能从而达到改善板形目的的一大障碍。在现场考察的基础上,基于Abaqus有限元软件对六辊铝板带冷轧机进行了辊系受力仿真,得到了辊间受力的情况,分析并验证了辊间压痕的成因是由轧辊倒角设计不合理或磨辊时处理不当,没有把倒圆角倒到规定的标准所造成,并由此提出了对轧辊倒角设计的改进方案并对倒角改进后的辊系受力进行了有限元仿真。结果表明,采用所提出的倒角改进方案能够大幅度减轻辊间压痕,从而对充分发挥六辊轧机的板形控制能力,对改善板形具有重要的意义。 相似文献