Spot welding is a resistance welding method
19 Jan 2020
Spot welding is a resistance welding method in which a welding piece is assembled into an overlap joint and is pressed between two electrodes, and the base metal is melted by resistance heat to form a welding point. Spot welding is mainly used in the following areas: 1. Lamination of sheet metal stamping parts, such as car cabs, cabins, fish scale sieves for harvesters, etc. 2. Sheet and profile steel structures and skin structures, such as side walls and roofs of trailers, trailer decks, combine harvester hoppers, etc. 3. Screen and space structure and cross reinforcement. During spot welding, the weldment becomes a lap joint and is pressed between the two electrodes. Its main characteristics are as follows: 1. During the spot welding, the heating time of the connection area is short and the welding speed is fast. 2. Spot welding only consumes electric energy, no filler material or flux, gas, etc. are needed. 3. Spot welding quality is mainly guaranteed by spot welding machines. Simpl...
Main points of the butt welding machine
11 Jan 2020
1. Butt welding machine operators must have professional training, be familiar with butt welding machine structure, performance, operating procedures, and master the knowledge of process parameter selection and quality inspection specifications. 2. Before operation, check whether the welding machine is sensitive and reliable, whether the electrical system is safe, whether the cooling water pump system is leaking, and whether the lubrication parts are well filled with oil. 3. It is strictly forbidden to weld steel bars with a diameter exceeding the specified diameter. Butt welding of the main steel bar must be carried out before cold drawing. In order to ensure the quality of welding, cleaning, rust removal and correction should be performed within a range of about 150mm of the tip. 4. When operating, the operator must bring colored protective glasses and hats to prevent arc light from irritating the eyes and molten metal to burn the skin. 5. The butt welding machine should be parked in...
The advantages of butt welding machine are as follows
03 Jan 2020
1. Energy saving. Radiator flash butt welding machine uses two 125KVA welding resistance transformers as the power source, pneumatic compaction, upsetting, and no hydraulic station. Compared with other other 315KVA single-phase AC welding transformers and two 18KVA hydraulic stations, the UN-250AB welding machine can save up to 78250. 2. Low requirements on the power grid. Only 250KVA power grid can meet. 3. High welding accuracy. Programmable controller PLC and imported stepping motor are used to control the flashing process, which can accurately set the amount of burning and the speed of burning; the welding current is controlled by the microcomputer welding controller The center distance error of the chip head after welding can be controlled within ± 0.2mm, which is convenient for the subsequent group welding. 4. Automatic centering function. Ensure that the distance between the two ends of the pipe string and the ends of the two chip heads before welding is consistent, so as to ens...
Small knowledge of butt welding machine
28 Dec 2019
Butt welding machine is also called current welding machine or resistance welding machine. By using the resistance between the contact surfaces of the two workpieces, a low voltage and large current are used to instantaneously heat the contact surfaces of the two butting metals to melt and fuse. Butt welding machine uses resistance welding method and flash butt welding method to realize welding of 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, its quality is reliable, its operation is convenient, its working place is flexible, and it is easy for the welder to master. Top calcining force, jaw distance, current can be easily adjusted according to needs, and can be automatically and manually fed. Suitable for wire drawing, nail making, cable and wire, steel wire rope, construction and other industries. Working principle: Radiator flash butt welding machine uses two 1...
Routine maintenance of hot melt docking machine
20 Dec 2019
Routine maintenance of hot melt docking machine 1. The welding machine should be placed in a dry, non-corrosive gas place. Must be placed smoothly, especially the control device is not allowed to be placed vertically, inverted, or sideways. 2. It is strictly forbidden that the welding machine and other objects are piled up and collided with each other. The appearance of the main parts of the welding machine must not be significantly damaged. 2. 3. The exposed surface of the guide bar on the rack should be clean and free of rust. 3. 4. Regularly check the hydraulic oil quantity and oil quality of the oil tank. When the oil quantity is insufficient, it should be replenished in time, and the oil deterioration should be replaced in time. 5. 5. Always check the hydraulic system for external leaks (drip, leak). If found, it should be repaired in time, otherwise it will affect the welding quality and pollute the environment. 5. 6. Do not allow dirt to adhere to the hydraulic quick coupling. D...
Specific steps of PE hot melt docking machine
14 Dec 2019
The main role of PE hot melt docking machine is to dock PE pipes such as water pipes and gas pipes. As a manufacturer of PE hot melt docking machines, Hangzhou Huanzhong will share the specific steps of the docking machine today: 1. According to the pipes and fittings to be welded, select the appropriate clamps to clamp the pipes and prepare them for cutting. 2. Cutting the impurities and oxide layer on the welded pipe section and the end face of the pipe to ensure that the butt end faces of the two pipes are flat, smooth and free of impurities. 3. The end faces of the two welded pipes must be completely centered. The smaller the wrong side, the better. The wrong side cannot exceed 10% of the wall thickness, and it will affect the quality of the joint. 4. The butt temperature is generally between 210-230 ° C. The heating time of the heating plate is different in winter and summer, and the melting length of both ends is preferably 1-2mm. 5. Take off the heating plate, quickly make the t...