Introduction to butt welding
Butt welding is performed on a manual or automatic special welder. When welding, the weldment is welded over its entire contact surface. A typical example of butt welding is shown in Figure 1. Butt welding can be divided into two main methods: resistance butt welding and flash butt welding. Figure 1 Typical example of butt welding Resistance butt welding Figure 2 resistance butt welding process The welding process of resistance butt welding is shown in Figure 2. The heating temperature and the upsetting speed should be strictly controlled during operation. When the vicinity of the contact surface of the weldment is heated to yellowish white (about 1300 ° C), the power is immediately turned off while the upset pressure is applied. If the heating temperature is insufficient, the upsetting is not timely or the forging force is too small, the welded joint is not strong; if the heating temperature is too high, the phenomenon of "overburning" will occur, which will also affect the strength of the joint; if the forging force is too large, It may cause cracking. The resistance butt welding operation is simple, the surface of the welded joint is smooth, but the internal quality is not high. The welded end faces of the weldments must be carefully leveled and cleaned before welding to remove rust. Otherwise, defects such as uneven heating or residual impurities in the joint may be caused, and the quality of the welding is worse. Figure 3 flash butt welding process The welding process of flash butt welding is shown in Figure 3. The heating temperature and the upsetting speed should be strictly controlled during operation. If the heating temperature is insufficient, the upsetting is not timely or the forging force is too small, the welded joint is not strong; if the heating temperature is too high, the phenomenon of "overburning" will occur, which will also affect the strength of the joint; if the forging force is too large, It may cause cracking. The welded end faces of the weldments must be carefully leveled and cleaned before welding to remove rust. Otherwise, defects such as uneven heating or residual impurities in the joint may be caused, and the quality of the welding is worse. Foldable Container House are often seen on the construction site. The price of this type of container house is favorable, and the construction efficiency is high. The house construction can be completed quickly, and it can be disassembled and re-installed at any time, so the practicability of the container house is also good. , ideal for temporary or emergency housing needs. However, many responsible persons are still more worried about the safety of such products. In fact, as long as they can meet the corresponding standards, the long-term use of such container houses is also guaranteed. So how to choose a high-quality container house? Which product lasts longer? Folding Container House,Container Homes,Foldable Container House,Portable House Foldable Container Home Henan Jinming Metal Material Co., Ltd. , https://www.jinminghouse.com
The two weldments to be joined are docked into the circuit and an axial primary pressure (P1) is applied to compress the workpieces. In the entire circuit, there is maximum resistance due to the contact of the two workpieces. Therefore, when a certain large current is passed, a large amount of resistance heat is generated at the contact, and the metal at the contact is quickly heated to a temperature slightly lower than its melting temperature (high plasticity state). At this time, the weldments are welded together under the extrusion of the upset pressure P2. 
2. Flash butt welding 
material selection is very important
Whether the folding container house can be used for a long time, then we still need to pay attention to the choice of its base material. The new generation of container houses are all made of galvanized steel, and the bottom frame, convex tube, and steel plate of the roof material all have different index requirements. Therefore, when purchasing, it is necessary to determine the material of each part, and the material is guaranteed to ensure its service life. Generally, this kind of container house can be used for more than ten years, and the windproof and rainproof effects are also good.
folding effect
The reason why many construction sites choose folding container houses is that they are easy to use and can be folded and unfolded like origami. It is recommended to choose Henan Jinming's new generation of folding box houses, because thickened light steel skeletons are mainly used, Rock Wool Sandwich Panel and Eps Sandwich Panel are used as wall panels, and high-strength galvanized alloy is used for the folding of the walls. The pages are connected, so that daily folding is convenient, and there is no need to worry about deformation and other problems after repeated folding. The service life can reach 20 years. This type of container house is easy to install, easy to consign, and can also reduce the occupied space. Widely used in homes, offices, classrooms, clinics and disaster relief shelters.
Fire and Flame Retardant Properties
The safety of the foldable container house is also very important. We must pay attention to its safety performance, and also pay attention to whether the manufacturer can provide the corresponding fire protection rating certificate, or relevant test reports, etc. Try to choose glass rock wool sandwich panels, which are all A-class fireproof materials, so that once a fire occurs, the house can also be prevented from catching fire, and the effect of effective flame retardancy can be achieved, so that it can also be used on some special construction sites. its security.
Henan Jinming folding container house provides customers with a flexible, cost-effective housing solution that can be quickly installed and quickly relocated according to needs.