板材

Based on the WM-model, the various stages of SPIF process was studied and the forming characters have been realized. Based on the SM-model of the truncated cone, the blank thickness element was sub-meshed into three levels. And through the forming simulation of the process, access to the plate stress and strain of the different regions in forming, and proposed the establishment of a sub-regional mechanism to explain the incremental forming, that is, in different regions, sheet deformation is different. In the main region which reflects the major character of SPIF, the deformation pattern is the composition of bending and extrusion.

基于完整有限元分析模型对渐进成形过程的各阶段进行分析，从而全面认识渐进成形的特点；基于方锥台件局部有限元分析模型，并将板材厚度方向的单元细分为三层，通过成形过程仿真，获取成形中，板材不同区域的应力、应变情况，提出并建立分区域的渐进成形机理解释，即，在不同区域，板材的变形方式是不同的，其中，对体现渐进成形主要特点的方锥台件和圆锥台件的侧壁充分变形区域，其变形方式是拉伸-弯曲复合变形。

The rencent processing technology of low-foamed sheet of rigid polyvinyl chloride is expounded mainly in splinterless processing, mechanical processing, connecting, thermoforming , surface treatment and so on, which may be some help to the application of low-foamed sheet of rigid PVC.

主要从板材的无屑加工、机械加工、连接、热成型、表面处理等几方面对硬质聚氯乙烯低发泡板材在现阶段的加工技术进行了阐述，以期对硬质PVC低发泡板材的应用有所帮助。

The author also studies the flow rule of the multisegment forming. According to the characteristic of 3-D deformation in sheet forming process and Mindlin hypothesis, the author establishes the model for sheet 3-D deformation and designs the finite element analysis software used in MPF. It will provide an effective analysis means for MPF in the future.

根据板材成形中三维变形的特点，作者基于Mindlin板壳理论，建立了用于三维金属板材成形过程分析的有限元模型，并编制了用于板材多点成形分析的有限元专用软件，为以后进行多点成形过程分析提供了有效的手段。

The index plates available with the Brown and Sharpe milling machines are Plate no.1: 15, 16, 17,18,19,20 holes The index plate used on Cincinnati and Parkinson dividing heads is Plate 1: Side 1 4,25,28,30,34,37,38,39,41,42 and 43 holes It is also possible to get additional plates from Cincinnati to increase the indexing capability a follows: Plate 2: Side 1 4,46,79,93,109,123,139,153,167,181,197 holes Plate 3: Side 1 26,42,73,87,103,119,133,149,161,175,191 holes

The索引板材可利用对布朗和Sharpe铣床是 Plate no.1 ： 15， 16， 17，18，19，20个孔 The在辛辛那提和帕金森分度头使用的索引板材是 Plate 1 ：一面4，25，28，30，34，37，38，39，41，42个和43个孔 It也是可能从辛辛那提得到另外的板材增加索引能力a跟随： Plate 2 ：一面4，46，79，93，109，123，139，153，167，181，197个孔 Plate 3 ：一面26，42，73，87，103，119，133，149，161，175，191个孔

Formaldehyde: mainly from the gel, in particular the use of plastic sheet, so formaldehyde mainly in sheet inside, Daixinban, composite flooring, MDF, particle board, the family will inevitably be used in decoration and plastic plates, then how to avoid pollution, I offer a few suggestions.

甲醛：主要来自于胶中，尤其是板材中使用的胶，所以甲醛主要存在于板材里面，大芯板、复合地板，中密度板，刨花板等，家庭装修不可避免会用到板材和胶，那么如何避免污染，我提供几点建议。

As a result, the intellectualization of sheet metal forming process is the higher level of new technologies such as press forming automation and flexible process system, by which not only can the feature of manufacturing technique be changed, but also the transformation of press equipment can be forwarded.

所以板材成形智能化过程是冲压成形过程自动化及柔性加工系统等新技术的更高级阶段，不但可以改变冲压生产工艺的面貌，而且还将促进冲压设备的变革，同时也会引起板材成形理论的进步与分析精度的提高，在降低板材级别，消除模具与设备调整的技术难度，缩短调模试模时间，提高成品率和生产率等方面都具有十分明显的意义。

This article thesis is aimed at exploring the overall structure design of plate edge milling machine, that is the design of plank stuff edge milling machine, also called the design of board groove machine.

请登陆后使用本站的搜索引擎，找寻您所需要的东东本文旨在探索板材坡口机的总体结构设计，即板材坡口机的设计，又称板材坡口机设计。

This article thesis is aimed at exploring the overall structure design of plate edge milling machine, that is the design of plank stuff edge milling machine, also called the design of board groove machine.

本文旨在探索板材坡口机的总体结构设计，即板材坡口机的设计，又称板材坡口机设计。

This article thesis is aimed at exploring the overall structure design of plate edge milling machine, that is the design of plank stuff edge milling machine, also called the design of board groove machine.

摘要：本文旨在探索板材坡口机的总体结构设计，即板材坡口机的设计，又称板材坡口机设计。

This article thesis is aimed at exploring the overall structure design of plate edge milling machine, that is the design of plank stuff edge milling machine, also called the design of board groove machine.

设计简介：简介：（论文53页、图纸全套）摘要：本文旨在探索板材坡口机的总体结构设计，即板材坡口机的设计，又称板材坡口机设计。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。