三轮车车圈成形辊的孔形设计

三轮车车圈成形辊的孔形设计长沙摩托车厂肖名瑜薄壁冷弯型钢在型材方面如角钢、槽钢、波纹板、乃至自行车、摩托车上的车圈、泥板，都是典型的例子。一般只需增加一些辅助设备，就可形成流水线生产，生产效率高，其综合经济效益优于其他型材，故在工业及建筑行业得到了越...

Curvatures estimation on triangular mesh

Curvatures are important geometric attributes of surfaces. There are many applications that require as a first step the accurate estimation of curvatures at arbitrary vertices on a triangulated surface. Chen and Schmitt (1992) and Taubin (1995) presented two simple methods to estimate principal curvatures. They used circular arcs to approximate the normal curvature. We find this may cause large error in some cases. In this paper, we describe a more accurate method to estimate the normal curvature, and present a novel algorithm to estimate principal curvatures by simplifying the Chen and Schmitt’s method. Some comparison results are also shown in this paper.

基于CAE的汽车支架成形前的带孔板材毛坯设计方法研究

以某汽车支架零件的成形工艺为例,研究了特殊形状结构零件在"先落料冲孔,后弯曲成形"的成形工艺中存在的侧冲孔废料难以卸除及模具寿命低等问题。分析了带孔板料毛坯在冲压成形过程中产生的变形对成形件质量的影响,以确保成形件的结构形状尺寸能够满足图纸要求。利用基于CAE(Computer Aided Engineering)的钣金成形有限元分析FASTFORM软件,根据成形件的数模及成形材料的属性,逆向展开输出成形产品精确的带孔板料毛坯,将数值模拟结果产生的板料毛坯的边形与孔形尺寸,作为落料冲孔模具凸、凹模的边形与孔形的设计依据,可有效缩短该类模具的设计周期,降低生产成本,提高产品质量与企业的市场竞争力。

Shape optimization of curved slots on 3D surface

In the aeronautic and aerospace thin-walled structures,hole shape designs are very popular to achieve the weight reduction,structural repa-ration,

立式砂辊米机筛网

该筛为优质进口材料经独特工艺和精密的孔形设计。铸就了其独有的性能：经特殊的热处理方式。其强度和韧性相济，延长了使用寿命；该筛具有减少增碎、排糠干净、不堵塞，成品晶莹整齐等特点。