本文较佳的扩径比为1.3左右。
采用主应力法推导圆管扩径时扩径力的解析式。
The formula of tube expanding force is deduced using the slab method.
单桩竖向承载力主要由扩径体(承力盘)承担。
The vertical load capacity of a single pile is mainly took on by the expanded branches and plates.
机械扩径是制造管筒形零件的一种精密成形方法。
Mechanical Expanding is one of the finishing processes in cylindrical part forming.
壁厚局部变薄量可以近似表示为扩径率的线性函数。
The local thinning of wall-thickness can be described by linear function of expanding-ratio.
分析了圆管压入扩径时内径变化的规律和影响因素。
This paper analyzes the variation principles and influence factors of inside diameter in tube press expansion.
结果表明，扩径率是影响制品横断面尺寸精度的一个主要因素。
Based on the results, expanding-ratio is important to dimensional precision of finished products.
继而从新的思路，以扩径作为薄壁管的变形方式进行抗撞性研究。
With new research ideas, thin-walled tube occur plastic deformation by expanding to achieve the purpose of energy absorption.
详细分析了管端机械扩径的变形过程，总结了机械扩径成形条件；
On the second place, detailed analysis was implemented for the pipe end deformation process during mechanical expanding, and forming criterion was also obtained.
介绍了煤气发生炉扩径改造中的一些问题，提出了具体的改造措施。
This article introduces the technical modification on gas producer and puts forwards some measures.
随着地层时差的不同和扩径量的不同，双发双收声系的补偿能力也不同。
The compensated ability varies with the difference of bed slowness and changes of hole diameter.
钢管扩径具有非常明显的加工硬化作用，扩径后钢管强度较扩径前普遍升高。
Pipe expanding can clearly own the mechanical hardness function and pipe strength after expanding has been raised.
根据斜轧扩径的工艺特点，利用坐标变换方法，建立了轧辊辊形的数学模型。
In this paper, a mathematical model to roll configuration of the rotary expansion of tubes is established, by using coordinate transformation.
桩身常见的缺陷形式一般包括桩身局部断裂，桩身局部扩径，桩身局部缩径等。
The usual form defect of piles include the party rupture of piles, the party enlarged of piles and the party necked-in of piles, etc.
桩身常见的缺陷形式一般包括桩身局部断裂，桩身局部扩径，桩身局部缩径等。
The usual defect forms of piles include the party rupture of piles, the party hole enlarged of piles and the party necked-in of piles, etc.
通过有限元数值模拟和实验，研究了扩径率和重叠量对制品品质的影响及其规律。
The influences of expanding-ratio and overlap-length on the quality of finished product was analyzed systematically by elastic-plastic FEM and expanding experiments.
大庆油田小通径套损井修复率低的主要原因是套损井段扩径、找通道技术不过关。
The main reason causing the low restoring rate of the small gauge casing damaged Wells in Daqing Oilfield is the inefficiency of drifting and reaming technology.
经计算分析，本文所研究的多光谱扩径准直系统测试性能及精度达到设计要求指标。
After analysis and calculation, the testing performance and precision of the studied multi-spectral aperture-expanded collimating system could meet the design requirement demands perfectly.
此时的最优扩径结构长度上变短，对变刚度结构前部扩径薄壁管截短的影响进行分析。
At this time, the optimal expanding structure get shorter, so the influence of the truncated thin-walled tube is analysed.
提出了一种近似超塑变形的扩径推弯成型方法，并成功地用于厚壁不锈钢弯头的生产。
A new process of such kind similar to superplastic deformation was proposed and hen put into production of heavy-wall stainless steel elbow successfully.
钢坯先在一台水压机上预成形制坯，再在另一台压机上模锻，经轧制扩径后冲孔压弯。
The billet was at first pre formed and close-die forged on different hydraulic presses and then the forging was rolled, punched and bended. Such a production line will be the most efficient.
对于复合扩径管，由于奥氏体粗晶度的原因，也可以采用信号处理系统有效地降低噪音。
It may also use signal process system to decrease noise efficiently for compound expanded pipes, due to austenite rough grain size.
而当扩径段长度大于一定范围时，岩屑在此段的静态运移规律和动态运移规律差别不大。
However, when the length of hole enlargement is larger than certain range, the cuttings static migration law and dynamic migration law is not so much different in hole enlargement section.
该方法在机械扩径工艺参数设计方面的应用结果表明，其优化效果好于非稳健优化设计方法。
A robust optimization designing method for the technical parameters of plastic forming processes based on quality control is proposed in this paper.
而与模具工作表面相接触的管坯，其变形则较为均匀，材料壁厚减薄较小，达到扩径整形的目的。
However, the deformation is more uniform with regard to billet in contact with the work surface of punch, material thickness decreases less, therefore, the purpose of calibration has been reached.
文中根据该导线《技术条件》提出的特殊要求，论述制造厂应如何解决扩径导线制造中面临的新问题。
This paper presents ways to solve the new problems arising during the production of expanded conductors based on the special requirements specified in the technical specification of the conductor.
在达到保护行人的目的后，保险杠内部尚有剩余空间，结合薄壁管扩径和压缩两种结构的特点，提出变刚度结构。
In the destination of pedestrian protection, there is space left in bumper. Variable stiffness structure is put forward combining the characteristics of both expanding and compressing tube.
研究表明，用多个扇形模具块对焊管端口进行机械扩径时，椭圆管坯的塑性变形具有显著的局部特性，且主要集中于悬空段。
The study shows that plastic deformation of the elliptical tube which has a significant local characteristic mainly concentrates in the vacant section, when expanding using several expanding punches.
基于可反映桩基荷载传递性状的“套叠”式桩周土变形模式和弹性理论，将等直径部分和扩径体部分桩周土分段建立位移方程，推导了桩身带有扩径体的非刚性和刚性DX抗拔桩的荷载-位移关系的解析解。
Based on the elastic theory and the overlapped-form strain mode of the soil, the paper deals with an analytical solution for the load-displacement relationship of non-rigid and rigid DX pullout pile.
在扩眼体设一斜水眼，在导眼体与扩眼体之间连接一缩径增效排屑环，强化了冷却清洗作用，从而保证钻头有较好的使用效果。
Set up a slant water hole at reamer, and connect the reamer and pilot with reducing synergy flute, which strengthen the cooling and washing function and ensure the bit's effects.
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