標準平橢圓管孔型的系數(shù)設(shè)計法

Method for Designing Groove Coefficient of Standard Flat Oval Tube

摘要: 根據(jù)標準平橢圓管各部位間的尺寸存在著固定系數(shù)關(guān)系和替代關(guān)系,通過一定數(shù)學(xué)變換,推導(dǎo)出一種針對標準平橢圓管孔型的系數(shù)設(shè)計方法;獲得了對所有標準平橢圓管孔型都適用的各道次變形系數(shù)λ_i,并且直接利用系數(shù)λ_i與標準平橢圓管管頭曲率半徑R之間的關(guān)系,設(shè)計標準平橢圓管各道孔型各部位變形尺寸。該方法既簡化了孔型設(shè)計程序,又提高了設(shè)計效率。

Abstract: Based on the fact that there exist regular coefficient relationship and substitution relationship between the dimensions of different parts of the flat oval tube,a method for designing the coefficient of the groove of the standard flat oval tube is deduced with relevant mathematical manipulation. As a result,the pass deformation coefficient λ_i is obtained,and it is applicable to any groove of the standard flat oval tube. And then,the relationship between coefficient λ_i and R,the curvature radius of the standard flat oval tube end is directly used to design the deformation dimensions of different parts of each pass for the oval tube. Thanks to this method,the design program can be simplified,and furthermore,the design efficiency is improved.