What are the working principles and advantages of the butt welding machine?
09 Nov 2020
Butt fusion welding machines is also called current welding machine or resistance welding machine. Using the resistance between the contact surfaces of the two workpieces, a low voltage and large current is instantly passed, so that the contact surfaces of the two butting metals instantly heat up to melt and fuse. The butt welder uses resistance welding and flash butt welding to weld various wires, rods, rings, plates, tubes and other profiles of low carbon steel, medium carbon steel, high carbon steel and non-ferrous metals. Its design is reasonable, the quality is reliable, the operation is convenient, the working place is flexible, and the welder is easy to master. The top forging force, the distance between the jaws and the current can be adjusted conveniently according to the needs. It can be fed automatically or manually. Suitable for wire drawing, nail making, cable and wire, steel wire rope, construction and other industries. working principle: The radiator flash butt welding m...
What are the characteristics of laser welding
02 Nov 2020
Spot welding machine Laser welding is one of the greatest inventions of the 20th century. The first device in the world came out in 1960. Laser welding is one of the most advanced manufacturing technologies today. Compared with general welding methods, laser welding has the following characteristics: 1) The power density after focusing can reach 10 to the 5th power to 10 to the 7th power W/CM2. Even higher. The heating is concentrated, and the heat input required to complete the welding of the unit length and unit thickness of the workpiece is low, so the deformation of the workpiece is very small, and the heat affected zone is also very narrow. It is especially suitable for precision welding and micro welding. 2) Welds with a large aspect ratio can be obtained, and thick parts can be formed at one time without grooves. The aspect ratio of laser welding seam has reached 12:1, and the thickness of single-pass welded steel plate without bevel has reached 50mm. 3) It is concerned with the...
The possible defects and prevention measures of welding equipment in appearance
26 Oct 2020
Appearance defects (surface defects) are defects that can be found from the surface of the workpiece without the aid of instruments. Common appearance defects include undercuts, weld bumps, depressions and welding deformations, and sometimes surface pores and surface cracks. The root of single-sided welding is not penetrated, etc. visit:https://www.chbuttfusionweldingmachine.com 1. Undercut refers to the depressions or grooves formed in the base material along the weld toe. It is the gap left by the arc melting the base material at the edge of the weld and not being fully supplemented by the deposited metal. The main reason for undercut is that the arc heat is too high, that is, the current is too large and the speed of the strip is too small. Incorrect angle between electrode and workpiece, unreasonable swing, long arc, unreasonable welding sequence, etc. will cause undercut. The magnetic bias of the arc during DC welding is also a cause of undercut. Certain welding positions (vertica...
How to prevent welding accidents
19 Oct 2020
There are many reasons for fire and explosion accidents during welding. First is that sparks, molten metal and red hot particles of molten slag splash around during welding, which ignite the surrounding flammable and explosive materials and cause fire and explosion; Second is that the cord of the electric welding machine is dragged on the ground for a long time, resulting in damage, rupture, and short circuit, causing a fire; Third is the random connection of the electric welding ground wire causing fire; Fourth, the welding machine itself and the power cord are damaged at all times, causing short-circuit heat and fire; Fifth, when welding and repairing a container with flammable and explosive materials, the container was heated and exploded due to uncleaned replacement welding. In addition, welding in flammable and explosive warehouses can also cause explosion accidents because feasible preventive measures are not taken. Therefore, the following preventive measures should be strengthe...
Protection of welders in welding production
13 Oct 2020
1. Prevent the hazards of dust and harmful gases in the welding production process The high temperature of the welding arc will cause the metal to evaporate violently. The welding rod and base metal will also produce metal gas and smoke during welding, which condense in the air and oxidize into dust; the radiation generated by the arc acts on the oxygen and nitrogen in the air, which will produce Harmful gases such as ozone and nitrogen oxides. The amount of dust and harmful gases is related to the welding parameters and the types of welding materials. For example, when welding with alkaline electrodes, the harmful gases produced are higher than those with acid electrodes; in gas shielded welding, because the shielding gas can dissociate under the action of arc high temperature, gas that affects the human body; if the electrode is used as thorium tungsten, thorium has a certain If the radioactive welding dust and harmful gases exceed a certain concentration, and the workers work under ...
The development trend of welding technology
09 Oct 2020
The development level of welding technology is one of the signs of the development level of a country's machinery manufacturing and science and technology. The current development trend of welding technology has the following characteristics: ⑴ With the continuous emergence of new welding materials and structures, it is necessary to develop new welding process methods. ⑵ Improve the commonly used common welding process methods, improve the mechanization and automation level of the welding process, and improve the welding quality and productivity. ⑶ Use electronic computers to control the welding process, and vigorously promote welding robots and welding centers. ⑷ Develop special complete sets of welding equipment. The following introduces some mature welding technologies: 1. Ultrasonic welding [Ultrasonic welding] refers to a pressure welding method that uses the high-frequency oscillation of ultrasonic waves to locally heat and clean the surface of the workpiece joint, and then apply...