Detecting of metal transfer in GMAW has great practical significance.

熔化极气体保护焊熔滴过渡检测具有重要的实际意义。

Gas metal arc welding (GMAW) is the main welding method in welding production.

熔化极气体保护焊(GMAW)是焊接生产中常用的焊接方法之一。

Simulation of feedback linearization and sliding mode control in GMAW systems;

滑模变结构控制+具有鲁棒性强，动态品质好等优点。

Deposit metal samples are prepared by GMAW shielded with different gases in copper mould with water cooling.

采用不同配比的保护气体，在水冷铜模中堆焊焊缝金属，获得不同扩散氢含量的熔敷焊缝试棒。

The GMAW welding thermal process for low alloy steel JG590 was analyzed based on the established heat source model.

将熔化极气体保护焊（GMAW）的热输入处理为三维移动串热源，建立了串热源模型，模拟了JG590低合金钢的GMAW焊接热过程。

The transition coefficients of alloying from cored wire to deposited metal during CO2 GMAW have been studied in this paper.

研究了药芯焊丝在CO2保护电弧堆焊过程中合金元素的过渡系数。

In GMAW welding process, when the welding speed reaches a certain threshold, there will be onset of weld bead undercut defects.

在GMAW焊接过程中，当焊接速度达到某一临界值时会出现咬边缺陷，进一步提高焊接速度就会产生驼峰焊道。

The welding parameters of CO2 welding iron, P-GMAW of iron and DP-GMAW of aluminum are long-step calibrated through a lot of tests.

通过大量工艺试验，对CO2焊钢、P - GMAW焊钢、DP - GMAW焊铝等工艺的焊接参数进行了大步距标定。

A digital control system based on DSP was developed and the hardware and software configurations of the GMAW control system were completed.

最后开发了一套基于DSP为核心的数字控制系统，完成了熔化极气体保护焊弧长控制系统的硬件电路设计和软件设计。

The result indicates that it is credible and feasible using ANSYS to calculate GMAW temperature field and introducing double-apex heat flux.

结果表明，使用ANSYS和使用双峰分布的热流来计算GMAW温度场均是可靠和可行的。

Based on the through the arc sensing method, a method is put forward to recognize the disturbance information of gas metal arc welding (GMAW).

基于电弧传感的检测方法，提出了一种识别GMAW焊接过程干扰信息的方法。

A: Start by using a weld process that provides more control over heat input: short circuit transfer GMAW (" short arc "), pulsed GMAW, GTAW and pulsed GTAW.

答：首先用焊接过程提供更多控制热输入：短路转让的GMAW(“短弧”)脉冲gmaw焊接、氩弧焊和脉冲gtaw。

Due to the rapidly growing requirement for high-pressure heave-wall pipeline installation, mechanized GMAW process is a key technology for increase welding productivity.

由于高压厚壁油气长输管线建设的迫切需求，采用自动GMAW焊是提高管线建设生产率的关键。

The high-speed twin arc pulse GMAW welding technology possesses the advantages of high efficiency, high quality and automatization, and is paid much more attention to nowadays.

双电弧共熔池脉冲gmaw焊集高速高效、优质和自动化于一体，近来备受重视，但国内对此研究不多。

The technology of numerical simulation for metal transfer in GMAW is one of the front and research hotspot in the weld filed , which has achieved great progress in recent years.

熔化极气体保护焊熔滴过渡数值模拟作为焊接学科的前沿领域和研究的热点之一，近年来已经取得了较大的进展。

The results showed that the backside melting width can be predicted by the network model during P-GMAW bead welding the thin plate when the welding parameters were input variable.

结果表明，在P - GMAW薄板堆焊中，以焊接规范为输入变量，利用该网络模型能很好的预测背面熔宽。

This paper illustrates the applications of mixed gases in GMAW and analyzes the different proportion of shielding gas impacts on the welding technics performance and quality in GMAW.

阐述了混合气体在熔化极气体保护焊中的应用现状，分析了保护气体成分的不同配比对熔化极气体保护焊的焊接工艺性能、焊接质量的影响。

In order to improve conventional GMAW process the effect of shielding gas quality and mixed ratio of different gases on welding quality are studied and useful fixtures are developed.

为提高常规气电焊工艺水平，进行了保护气体质量及配比对焊缝质量影响规律的研究及气电焊辅具的研制。

The waveforms of the welding voltage and current, corresponding to short-circuit metal transfer of CO2 GMAW, are evaluated to acquire the characteristic of short-circuit metal transfer.

介绍了熔滴过渡的数据采集系统，采用多种数据处理方法对焊接电压波形和电流波形进行分析，并从中提取出短路过渡的熔滴过渡特征。

The welding method used was a PC-GMAW process with mixture gases shielding. Central crack for the welded plate was located in the fusion zone between welding seam and heat-affected zone.

焊接方法为脉冲熔化极混合气体保护焊，焊接板的中心裂纹处于焊缝与热影响区之间的熔合区。

The experiment result shows that the GMAW welding characteristic could be improved obviously by adjusting the parameters accurately, and the different welding technical requirement can be meet.

结果表明通过对波控参数精确的调节，可以有效地提高GMAW的焊接性能，可以满足不同的焊接工艺的要求。

The short circuit transfer of GMAW with argon shieding is used to weld aluminium-plated steel sheets or plates. In the way of this, both joint quality and corrosion resistance can be increased.

镀铝钢板焊接采用熔化极氢弧焊短路过渡方法，使其焊接接头的质量和耐蚀性都得到了提高。

This paper mainly introduces the different arc shapes, metal transfer modes, compositions of arc and temperature distribution in plasma-GMAW with different electrode connection forms at present;

主要介绍了目前等离子—熔化极气体保护焊在采用不同的电极连接形式下，不同的电弧形态和熔滴过渡方式，以及电弧成分组成和温度分布；

In order to study metal transfer characteristics during dual bypass GMAW (DB-GMAW) process, many kinds of edge extraction algorithms were used to process the necking images of DB-GMAW metal transfer.

为了对多弧旁路gmaw (DB - GMAW)焊接过程中的熔滴过渡特征信息深入研究提供条件，对该种焊接方法下熔滴过渡图像颈缩部分边缘提取算法进行了研究。

Then, high-speed arc welding processes are introduced, such as tandem GMAW, PAW-GMAW and DE-GMAW, based on two categories:twin or more wires arc welding process and two-torch combined welding process.

然后主要从双丝或多丝电弧焊工艺和双焊炬组合焊接工艺两个大的方面着重介绍了纵列式熔化极气体保护焊、等离子弧-熔化极气体保护焊和双电极熔化极气体保护焊等高速弧焊工艺。