Development of production precision pipe-like parts by HDS

HDS 开发生产型精密管状零件

• 批准号: 07555529
• 负责人: NIWA Naotake
• 金额: $ 0.64万
• 依托单位: Kogakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555529/
• 关键词: new production method; precision; pipe; stamping; FEM; simulation; 多品種少量生産; 多品種小量生産

Light, small, high performance, efficiency, high reliability and low cost have been strongly requested in precision instrument, electrical appliances and etc.recently, which indicates parts of these instruments being in the same situation.The aim of this study is to develop the production method for precision pipe-like parts by HDS (Hollow Disk Stamping). HDS is able to produce efficiently precision, thin and short pipe, which has been difficult by conventional method, however, the process window of HDS should be rather narrow.In this study, we made an analyzing system on the process of HDS and measured the stroke of punch vs.load and strain distribution during stamping. Adding to the experimental analysis, the analysis of stress and strain was done by finite element method. In the HDS,a pipe is made through a blank being pushed into die by punch. During the deformation, there is neutral section between tension inner part and compression outer part of blank and the position of the neutral section is one of the most important parameter to determine the range of process window. The balance among forces in tension inner part and compression outer part of blank needed for deformation and brought by friction is more important than deformability of tension.

近年来，精密仪器、电器等行业对轻、小、高性能、高效率、高可靠性和低成本的要求越来越高，这也预示着这些行业的零件也面临着同样的问题，本研究的目的是开发一种用HDS（Hollow Disk Stamping）技术制造精密管形零件的方法。本文建立了一套HDS工艺分析系统，测量了HDS冲压过程中冲头的行程、载荷和应变分布，并对HDS工艺过程进行了分析。在试验分析的基础上，采用有限元方法对试验结果进行了应力应变分析。在HDS中，通过将坯料由冲头推入模具中来制造管。在变形过程中，在坯料的拉伸内部和压缩外部之间存在一个中性区，中性区的位置是决定工艺窗口范围的重要参数之一。坯料内部受拉变形所需的力和外部受压变形所需的力之间的平衡以及摩擦力的产生比拉伸变形能力更重要。