缩径

QS钢管缩径机，“福斯特”WE67K系列数控板料折弯机；

QS Steel Tube necking machine ," Fox special " WE67K series CNC sheet metal bending machine ;

浮动球阀具有全通径和缩径两种结构形式。

ANSI full bore and necking of two structural forms .

正圆锥两节渐缩径弯头展开图cad

CAD for the Evolve Drawing of Two-elbow with Positive Cone

PLC对管件缩径机床的控制改造

Manipulation and Transformation of PLC in Pipe Fitting Reducer Machine

非开挖PE穿管修复法的允许缩径

Permission Reducing Diameter of Non-excavation PE Pipeline Inserting Renovation Method

基于FEM的电磁缩径耦合场数值模拟

Numerical simulation of coupled fields of electromagnetic forming for tube-compression based on FEM

逆流两段再生FCC装置烟气分布板喷嘴缩径改造

Reducing nozzle diameter of flue gas distributor in the revamp of countercurrent two-stage FCC regenerator

PE具有形状记忆特点，在暂时缩径穿入管子后，恢复并涨贴于管道内壁上，可以形成性能良好的衬里。

PE is featured by figure memory , we can line it inside the pipelines to form a favorable liner .

对管件电磁缩径的磁场力和动态变形进行了耦合场FEM数值模拟。

The magnetic forces and dynamic deformation analyses for tube-compression by electromagnetic forming are performed by coupled fields FEM numerical simulation .

当总的缩径变形比n总大于其极限变形比n极时，需多次缩径，且每次缩径比n应小于n极。

When the total ratio of sinking deformation n_t is larger than that of the critical deformation n_l , multi-sinking is demanded and every sinking ratio n should be less than n_l .

PP-R管承插热熔连接不规则缩径现象剖析

Analysis of Anomalistic Diameter Reduction in PP-R Pipes Fusion Joint

应用长螺旋钻管内泵压CFG桩施工工艺处理高灵敏度土时，常常造成桩周饱和土层剪切液化，引发串孔、缩径、断桩、地面沉降等不良工程事故。

Fleeing problem , reducing diameter , breaking pile and land subsidence , etc often happen during the application of twist boring concrete pumping piling technique in high sensitive soil .

阐述了某机械制造厂的管件缩径机床缩径过程的工艺要求，介绍了PLC在用于该工序加工的机床控制系统改造中的应用，给出了I/O分配图、外部接线图和梯形图。

Explains a technological demand for the process of pipe fittings reducer in a machine-building plant , introduces a application of PLC in the center control system of the machine tool , and distribution diagram . The outer circuit diagram and ladder diagram are given .

采用主应力法和修正的Tresca屈服准则，可分别导出缩径成形力和壁厚变化规律的计算公式。

In addition , the equations for calculating the sinking force and wall change are derived by using the slab method and the modified Tresca yield criterion .

FGV闸阀阀体的流道可分为，全通径式和缩径式两种。

FGV gate valve can be divided into the passage , full-bore type and non-reducing type two kinds .

5口井的应用表明，使用ZSC-201固相化学清洁剂，平均井径扩大率为10.18%，解决了上部地层水化膨胀、缩径问题，保证了起下钻的畅通；

ZSC-201 has been used in five wells and the results displayed that hydration swelling and shrinking of upper formation was prevented with average borehole enlargement rate of 10.18 % ;

该井复配使用K-PHP和PAC-141，控制pH值为8.0～8.5，有效地稳定平原组、明化镇组井壁，减少井眼缩径、钻头泥包现象的发生；

Such additives as K-PHP and PAC-141 were added into this well , to control the pH value between 8 . 0 - 8 . 5 , this effectively stabilized the borehole , minimized bore shrinkage and bit balling ;

对于内径、外径分别为32mm、42mm的胀形线圈和内径、外径分别为56mm、66mm的缩径线圈，得到了均匀变形长度比例曲线，并进行了理论和试验验证。

For i.d 32 mm , o. d 42 mm bulging coil and i.d 56 mm , o. d 66 mm tube-compression coil , the proportion curves of uniform deformation have been obtained , and validated by theory and trials .

高碳钢盘条缩径原因的研究

Research on cause of reducing diameter of high-carbon steel wire rod

油井套管缩径连续扩胀整形技术是一项新技术。

Shaping reduced casing by continuous expansion is a new technique .

振动沉管灌注桩缩径原因的分析及预防

Analysis of Cause of Shrink Diameter and Prevention for Vibro Pile

轮毂轴承的较小直径端选择不缩径全流道结构时，压降最小

SMALLER DIAMETER OF PIVOT BEARING Minimal pressure drop if full-port selected

薄壁圆筒缩径成形数值模拟参数优化设计

Optimize design of forming parameter to net-sinking with thin-walled cylinder

钻柱中加接扩孔器解决缩径卡钻

Reaming Machine Added to Solve Diameter-Shrinkage Bit Blocking in Drilling

控制油井盐层段流变缩径的泥浆密度的计算方法

Calculation method of mud density to control borehole closure rate

荒煤气管道增设缩径管在炼铁生产中的应用

The usage of adding shorten pipe to original gas pipe in ironmaking

预防盐膏层缩径的钻井液技术。

Technology of drilling fluid to prevent salt layer from shorting diameter .

沟槽式微热管缩径工艺研究及装置开发

Study of the reducing craft of micro-grooved heat pipe and device development

SJ194缩径机的研制及机理分析

Developing and Mechanism Analysis for SJ 194 Size Reducing Machine

海峡会展冲孔桩缩径成因分析与对策

Necking Cause Analysis and Countermeasure of Strait International Convention and Exhibition Center