不同厚度304不锈钢薄板微盒形件拉深试验研究

发布时间：2018-02-01 15:40

本文关键词： 微拉深盒形件微硬度减薄率　出处：《热加工工艺》2017年21期 　论文类型：期刊论文

【摘要】：微拉深是一种高效加工开口型薄壁零件的工艺方法,但由于尺度的减小,常规拉深工艺的材料和模具无法满足微拉深的要求。采用5 mm×10 mm凸模对厚度100、200μm的SUS304薄板进行了微拉伸试验,对拉深试样进行了镶嵌打磨,测量其剖切面厚度减薄率分布以及关键部位厚度方向的微硬度分布。结果发现微盒形件最大减薄发生在凸模圆角附近,厚度减小,薄板减薄分布不均匀性增加;凸模圆角部位发生明显的加工硬化现象。试样厚度减小,圆角部位厚度中心层低硬度区现象减弱。即薄板厚度减小,拉深成形中的变形协调条件减弱,变形不均匀性增加,成形能力下降。
[Abstract]:Micro-drawing is a kind of high-efficiency processing method for thin-walled parts with open surface, but due to the decrease of scale. The material and die of conventional drawing process can not meet the requirement of micro-drawing. The SUS304 sheet with thickness of 100,200 渭 m was tested by 5 mm 脳 10 mm punch. The inlay grinding of the deep drawing specimen was carried out to measure the distribution of the thickness thinning rate of the section surface and the microhardness distribution in the direction of the thickness of the key position. The results showed that the maximum thinning of the microbox occurred near the corner of the punch and the thickness decreased. The distribution inhomogeneity of thin plate thinning increases; The specimen thickness decreases and the low hardness region of the central layer decreases. That is, the thickness of the thin plate decreases and the deformation coordination condition weakens in the deep drawing. The deformation inhomogeneity increases and the forming ability decreases.
【作者单位】：江苏大学机械工程学院;
【基金】：江苏大学工业中心创新实践基金支持项目(ZXCXJJ201404)
【分类号】：TG386.41
【正文快照】： 微拉深是广泛应用于微成形制造领域的典型工艺,但是拉深成形过程相对复杂。国内外针对微拉深成形的试验和理论研究成果显著。日本的Saotome[1]将CCD传感器用于微拉深的试验设备。Hyunok Kim[2]研究了润滑剂对拉深成形的影响。Feng Gong[3]在微杯拉深模具表面上以及压边圈上制

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