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论述平面高效滚切磨削精密加工技术的基本原理;分析滚切刀具与普通刀具的本质区别及适宜高速切削的依据;指明高效滚切磨削加工技术的优越性. 相似文献
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介绍了一种新型成形模具的设计思路,变一般上下冲切为旋转滚切,既简化了模具结构,又提高了生产速度,并对模具中的关键零件滚切刀片的制造工艺进行了简要的介绍。 相似文献
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40Mn2圆钢作为锰系合金结构钢产品,因其良好的加工性和使用性广泛用于机加工行业,本文介绍了该产品在用户机加工冷剪剪切下料及圆钢轧后冷剪剪切工序中产生端部裂纹的基本形貌,分析了产生此问题的冶炼及轧制工艺原因,并针对此现象采取降低铸坯中心疏松、减少气孔、提高剪切温度等对策,最终解决这一问题。 相似文献
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《Acta Materialia》2000,48(2):553-564
Tensile specimens were machined from heat-treated austenitic stainless steel plate prior to and after 70% reduction by uni-directional rolling. In addition to a single specimen cut from the as-received plate, two specimens were cut from the rolled plate, with axes parallel and perpendicular to the rolling direction, respectively. In situ measurements of the strain response of multiple hkl lattice planes to an applied uniaxial tensile load were made using neutron diffraction, to macroscopic plastic strains of around 1%. The experimental results are compared with predictions from a self-consistent Hill–Hutchinson model. The measured texture in the plate was approximately three times random; however, its effect on the hkl response was small compared to the residual strains left by rolling. The apparent elastic modulus of the planes is affected by the residual strains, which is attributed to the effect of micro-plasticity. Interpretation of residual stress measurements, for both single peak and Rietveld measurements is considered in light of these results. 相似文献
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连铸连轧工艺被普遍应用于有色金属线杆的生产。对原铝液加工电工圆铝杆的成分控制、熔炼控制和铸轧环节控制进行了分析和调整。生产结果表明,用原铝液直接加工电工圆铝杆可减少重熔工序,降低能耗。 相似文献
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研发了2.3t铸锭的5Cr21Mn9Ni4N(21-4N)奥氏体气阀钢轧制开坯工艺.热模拟此钢种在高温状态的抗拉强度Rm和断面收缩率Z,并根据生产设备功能状态,分析确定了适合该奥氏体气阀钢2.3t铸锭轧制开坯的温度范围,以及相应的初轧加热工艺制度和初轧机压下规程及轧制方法.对轧制能力与热剪机能力的验算,确认Φ750 mm初轧机、650 t热剪机等设备具备轧制2.3t铸锭生产160 mm×160 mm奥氏体气阀钢的可行性.产品质量满足奥氏体气阀钢线材盘卷单重≥1.5t的供坯需求,实现了规模化轧制生产.新工艺较大幅度地降低了吨钢生产的天然气消耗和动力电消耗、有效地降低了生产成本. 相似文献