Like the previous exhibitions, the 19th Beijing Essen Welding and Cutting Exhibition also revealed the latest developments in welding equipment, welding materials and welding technology in China. During the exhibition, the author shuttled through the dazzling booths and found a lot of valuable information. Because I can only "walk and see", it is inevitable that I will "hang a leak", so I will only study and understand the deepest information about high-strength steel welding. Out, for peer reference.
High-strength steel welding era welding robot
Welding robots are the key high-end equipment for intelligent welding manufacturing and play an increasingly important role in welding manufacturing. Therefore, the concept of welding robots providing high-quality and high-quality welding products has been deeply rooted in people's hearts.
Time Group has outstanding advantages in welding equipment, mechanical design and manufacturing and control technology. At present, the application of industrial robots in the welding field accounts for about 40%. According to this, the first stage of the era robot is positioned as a welding robot. Firstly, develop a practical and reliable 6-degree-of-freedom welding robot and a positioner that works in harmony with it, and form a welding robot workstation with the digital welding machine of the era to form a self-branded 6+2 degree-of-freedom welding robot system. The field is promoted and applied, and at the same time, it is also developed in familiar fields such as cutting-out.
Welding robot on the exhibition stand At present, Time Group has developed two-joint industrial robots with two specifications: TIR6 and TIR20. The repeat positioning accuracy is ±0.08mm, and the load capacity is 6kg and 20kg respectively. In addition, TRP-D200H and TRP-D750L two-axis positioners have been developed. The D200H is a bilateral support structure, and the D750L is a single-sided support structure. The repeat positioning accuracy is ±0.1mm, and the load capacity is 200kg and 750kg.
The robot is especially suitable for high-strength steel welding, because in the welding of high-strength steel, the stability of the arc voltage is ensured, that is, the stability of the welding heat input is ensured, and the automatic welding of the robot can completely eliminate the interference of human factors and maximize the stability of the arc voltage. Therefore, the welding quality of high-strength steel can be guaranteed. It can be predicted that due to the emergence of high-strength steel, the large-scale use of robotic automatic welding in the steel structure industry is only a matter of time.
New pulse MIG welding machine for high strength steel welding
Mr. Song Tianhu said: "By getting rid of the experience-based production, we have developed a new generation of manufacturing concepts with 'high-precision control' and 'low damage control' with modern industrial characteristics, and then create first-class welding technology and research and development. Welding materials, creating first-class welding equipment and achieving high performance and high quality of its products."
Sichuan Marui Welding Industry Development Co., Ltd. developed a new pulse MIG welding machine for welding heat source matched with robot. The application of 20% CO2+80% Ar argon-rich gas to achieve fast pulse compression arc welding process is an effective way to solve high-strength steel high-quality welding.
The pulse compression arc has high jet velocity, large current density, small heat loss, strong stability and large penetration depth, and is suitable for high-quality welding, and is particularly suitable for welding high-strength fine-grain steel. The main advantage of using the new pulsed MIG welder is that the jet transition can be achieved at very low currents. Under the normal DC MIG condition, the current must be more than 250A to achieve the jet transition, and the new pulse MIG can achieve the jet transition at 60A. While achieving the dual advantages of high quality of TIG and high efficiency of MIG, a fast pulse compression arc can be realized, and a welded joint with good comprehensive performance can be obtained. This model is very suitable for welding robots due to the special welding arc.
DSP-500MIG welder High-strength steel welded copper-free wire
Unlike the previous Beijing Essen Welding Exhibition, the number of companies producing copper-free wire is increasing rapidly. This trend is indeed gratifying.
Compared with the copper-plated wire, the GMAW non-coppered wire has a smaller splash, and the most direct performance of the weld is that the wettability of the weld is better, the weld is smoother, and the weld of the copper-plated wire The metal will bulge. Therefore, the formation of the non-coppered copper wire after welding is more beautiful, the smoothness is good, and the welded joint is more white. In addition, the non-coppered wire has good electrical conductivity. There is no arcing caused by the conduction problem in the use of the test and the engineering trial; the advantage is especially prominent in the small current working condition; the Zhejiang Seiko welding test confirms that the GMAW method uses GMAW without welding copper wire when the welding current is 80A. The welding stability is much better than the GMAW copper plating wire.
Compared with GMAW copper-plated wire, GMAW non-coppered wire has good welding process performance, low spatter and welding fumes during welding, and good weld formability, which completely solves the copper pollution problem in the production and use of welding wire. Most of the factors that affect the environmental pollution and the welder's body are excluded.
In the welding research of high-strength steel, it is concluded that the non-coppered copper wire is especially suitable for automatic robot welding; according to the needs and research direction of the new pulse welding machine, a new type of copper-free wire and 20% CO2+80% Ar double is adopted. As the protective gas of the test, the quality and efficiency of welding high-strength steel plate joints were remarkable, and the test was successful.
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