锻压技术

一种半空心铝型材的保护式分流模结构

英文标题：A protection type of porthole die structure for semi-hollow aluminum profiles

作者：邓汝荣黄雪梅

单位：广州科技职业技术学院

关键词：铝型材半空心保护式分流模

分类号：

出版年,卷(期):页码：2016,41(7):87-90

摘要：

介绍了一种半空心型材的判定方法，提出了适合于该类型材的一种新的保护式分流模结构，分析了这种结构的设计过程，介绍了有关设计参数的选择方法，主要包括分流孔的布置、模芯结构与分流孔进料方式的确定、壁厚补偿的位置与大小和下模焊合室结构设计与工作带选择。并根据挤压结果，对传统的平面模和新的保护式分流模结构进行了对比。这种新的保护式分流模结构具有结构简单、容易加工的特点。实践表明，采用这种模具结构可显著提高模具强度和寿命，可以达到传统平面模寿命10倍以上，以及明显提高挤压产品的质量，所得型材尺寸精度高、表面光亮，消除了使用平面模结构所产生的壁厚不均匀现象。

A judging method of semi-hollow profiles was introduced，and a new protective porthole die structure fitting for semi-hollow profiles was put forward and its design process was analyzed. The selection method of design parameters was introduced, mainly including the layout of portholes， the determination of die core structure and feeder type， the position and size of the wall thickness compensation, the welding chamber structure design, and the selection of bearing. According to the extrusion results， the structures of the traditional planed die and the new protective porthole die were compared, and the characteristics of the latter structure were simple and easy to process. The practical application shows that the die structure can enhance the strength and prolong the life of the die. And the life is 10 times more than that of the traditional planed die, and the quality of the products is improved apparently. Furthermore, the high precision and the surface brightness of the profiles are obtained， and the uneven wall thickness is eliminated.

基金项目：

广东省高等职业技术教育研究会一般课题（GDGZ15Y084）;2016年广东大学生科技创新培育专项资金项目（“攀登计划”专项资金，pdjh2016b0865)

邓汝荣（１９６４－），男，学士，高级工程师

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