NX项目冲压同步工程降成本控制研究

成本控制一直以来是冲压同步工程的重要内容。对白车身制造过程中冲压区域和车身焊接区域的成本进行了分析,以NX项目为例,冲压SE团队在模型设计阶段和产品工程化阶段通过对模型分缝线、断面分析、材料选择、整车材料利用率和生产制造成本等方面进行了仔细研究并进行相应成本控制,最后整车材料利用率达到62%以上,圆满完成既定目标。     

胶印联机冷烫跳步机构的设计与分析

烫印是印后加工的重要工艺之一,联机冷烫技术近年来得到了快速发展,目前的联机冷烫设备多为连续输送烫印箔,在印刷滚筒空档相对时造成了铝箔的浪费。为了解决此问题,采用凸轮摆杆机构,实现在空档相对时降低烫印箔输送速度,从而提高烫印箔的利用率。设计了一种跳步机构,对该跳步机构工作原理进行了阐述,对速度进行了计算和分析,建立了该机构的运动模型。结果表明,该机构能够在中低速胶印机上联机安装,并能有效地减少烫印箔的浪费。     

Corrosion Resistance of Different Metallic Coatings on Press‐Hardened Steels for Automotive

The corrosion resistance of laboratory press‐hardened components in aluminized, galvanized or galvannealed boron steels was evaluated through VDA 621‐415 cyclic test for the automotive industry. 22MnB5 uncoated steel for hot stamping and standard galvanized steel for cold forming were also included as references. Corrosion resistance after painting (cosmetic corrosion) was quantified by measuring the delamination of electro‐deposited paint from scribed panels. The rusting on their edges was used for determining the cut‐edge corrosion resistance. The corrosion resistance on unpainted deformed panels (perforating corrosion) was quantified by mass losses and pit depth measurements. Zinc‐coated boron steels were found to be more resistant to cosmetic corrosion than the other materials, and slightly more resistant to cut‐edge corrosion than the aluminized one. Red rust apparition could not be avoided due to the high iron content in all these hot‐stamped coatings. The three coated boron steels showed similar performances in terms of resistance to perforation. Aluminized boron steel presents the advantage of being less sensitive to hot‐stamping process deviation. Its robustness has been proved for many years on cars.     

聚能冲压复合解堵增注技术

针对胜利油田低渗透油藏注水开发过程中欠注原因复杂,处理难度大,化学酸化处理半径小等问题,引进了聚能冲压复合解堵增注技术。该技术是一项集物理增注与化学增注为一体的增注技术,它一方面利用其物理特性实现解堵,另一方面又利用酸化的优势,实现低渗透油藏的深部解堵及渗流能力的改善,具有增注效果好,有效期长的特点。现场26口注水井的试验结果表明,聚能冲压复合解堵增注技术有效率90%,平均单井累计增注在3 000 m3以上,有效期超过180 d。该技术的实施对于进一步挖掘剩余油潜力和提高水驱油藏采收率具有重要意义。     

基于纳米压痕逆算法的热冲压马氏体/贝氏体双相组织的微观力学性能

为研究高强度钢热冲压后微观组织(尤其是多相微观组织)的力学性能及本构关系,首先通过控制冲压时的模具温度和保压时间获得包含全马氏体、全贝氏体以及马氏体/贝氏体混合组织的试件.然后利用纳米压痕实验获得不同微观组织的载荷-位移曲线,并采用纳米压痕逆算法进行量纲分析计算出上述微观组织的弹性模量、屈服强度、应变硬化指数等力学性能...     

清洁型热回收焦炉节能措施

结合SYR型捣固式清洁型热回收焦炉运行状况,着重分析影响其能耗的主要因素,包括市场因素、烧失率、入炉煤水分等,针对这些影响因素并根据《焦化行业准入条件》（2008年修订）相关要求,为进一步降低企业能耗,提高企业效益提出合理化建议。     

Spline forming of ultra-high strength gear drum using resistance heating of side wall of cup

A spline forming process of an ultra-high strength steel gear drum using resistance heating of a side wall of a cup formed by cold deep drawing and ironing was developed. The side wall having uniform cross-sectional area was heated by the electrification in the axial direction. The uniformity of the temperature was improved by inserting copper foils between the electrode and the side wall, and by decreasing the area of contact. Although the high strength steel cup was fractured by cold spline forming, the gear drum was successfully formed by the heating.     

提高冲压模具使用寿命的方法探讨

在现代工业生产中,冲压模具的使用非常普遍.冲压模具寿命的高低是影响冲压产品成本的重要因素.提高模具寿命、降低产品成本是模具生产、制造和使用企业不断追求的目标.影响冲压模具寿命的因素很多,本文从模具设计、选材、制造加工工艺以及模具零件的表面处理等方面,对提高冲压模具使用寿命的方法进行探讨,供同行参考.     

超高强度钢板热冲压成形CAE技术的研究现状与发展趋势

随着人们环保意识的逐渐加强和对汽车安全性能要求的日益提高,各大汽车公司纷纷将汽车的低油耗、低排放和安全性放在首位.超高强度钢板热冲压成形技术是减轻车身重量、提高汽车抗冲击和防撞性能的重要途径,目前已经成为世界汽车制造行业的热门技术.本文对超高强度钢板料热冲压成形CAE分析技术的研究现状进行了全面的总结,并指出了存在的问...     

车门成形后凹陷成因分析和应对措施

局部凹陷是轿车外覆盖件成形中的一种典型问题,其成因和控制方法一直是困扰汽车行业的一个难题。通过有限元模拟,分析了成形中的应力应变的演变状况,并据此提出了车门成形后在把手部位出现凹陷的原因和应对措施。由于受到零件形状的影响,在成形末端材料流动不均匀,而导致了最终应力分布的不均匀。在卸载阶段,应力的释放引起了车门把手周围的局部凹陷。针对上述成因,改变零件形状、改变补充面形状或设计拉延筋、对局部施加强压等方法均有助于改善凹陷情况。