采用风批力矩替代手动紧固阀门的工艺研究

本文通过对手动紧固阀门存在问题的分析和对阀门紧固工序的调研,认为手动紧固阀门需要改进,从而展开了采用风批力矩替代手动紧固阀门的工艺研究,经实验验证,该研究具有可行性并开始推广实施。

3D Ice Shape Description Method Based on BLSOM Neural Network

When checking the ice shape calculation software,its accuracy is judged based on the proximity between the calculated ice shape and the typical test ice shape.Therefore,determining the typical test ice shape becomes the key task of the icing wind tunnel tests.In the icing wind tunnel test of the tail wing model of a large amphibious aircraft,in order to obtain accurate typical test ice shape,the Romer Absolute Scanner is used to obtain the 3D point cloud data of the ice shape on the tail wing model.Then,the batch-learning self-organizing map(BLSOM)neural network is used to obtain the 2D average ice shape along the model direction based on the 3D point cloud data of the ice shape,while its tolerance band is calculated using the probabilistic statistical method.The results show that the combination of 2D average ice shape and its tolerance band can represent the 3D characteristics of the test ice shape effectively,which can be used as the typical test ice shape for comparative analysis with the calculated ice shape.

国内气扳机产业的发展历程回顾

前言气扳机是螺纹紧固作业的主要工具,也是具有叶片式发动机的回转类气动工具产品家族中的大哥大,它麻雀虽小,但五脏俱全。气扳机属于技术密集型一类的产品,产量大,使用面广,制造难度较大。笔者多次见证过一些公司开发气扳机屡屡失败,数百万元投资打了水漂,现今仍有一些公司在气扳机产品的开发上如鲠在喉,骑虎难下。可以毫不夸张地说,谁能够攻占气扳机设计、制造这块高地,再继续开发其他回转类气动工具,比如气钻,气砂轮等产品,则是“会当凌绝顶,一览众山小”了。

冲击式气螺刀扭矩参数探究

简要介绍了行业标准JB/T XXXX-2020冲击式气螺刀(送审稿)中拧紧扭矩参数的制定原则和科学依据,首次提出了产品扭矩分级评价指标,有一定的原创性,可供有关人员参考。