What is brazing
25 May 2019
What is brazing? How is brazing classified? What are the characteristics of the brazed joint form? Brazing is to use a metal whose melting point is lower than that of the base material as a brazing material. After heating, the brazing material melts, the weldment does not melt, the base material is wetted by the liquid brazing material, the joint gap is filled and the base material is mutually diffused, and the weldment is firmly fixed. Connected together. Brazing is divided into soldering and brazing depending on the melting point of the solder. (1) Soldering: The soldered solder has a melting point of less than 450 ° C and a low joint strength (less than 70 MPa). (2) Brazing: The brazing filler metal has a melting point higher than 450 ° C and a higher joint strength (greater than 200 MPa). The bearing capacity of the brazed joint is related to the size of the joint face. Therefore, brazing is generally lap joints and kits to compensate for the lack of brazing strength.
ZHE JIANG CHENG HONG MACHINERY CO.,LTD
21 May 2019
Zhejiang Chenghong Machinery Co.,ltd Is a professional manufacturer engaged in PE, hdpeP, PPT thermoplastic plastic pipe engineering machinery, with advanced technology, practical functions, products certified by CE, is currently one of the largest docking welding machine manufacturers in Zhejiang. Specializing in the production of supply automatic docking hot melt welding machine, semi-automatic docking buttfusion welding machine (hydraulic semi-automatic and manual), large diameter plastic pipe socket welding machine, PPR socket welding machine. The products are sold well all over the country more than 30 provinces, autonomous regions, and exported to the Middle East, eastern Europe, southeast Asia, central Asia and other African countries.
2019 New products Catalogue
17 May 2019
Butt fusion welding machine (Manual &Hydraulic) 40-160mm,63-200mm.63-250mm, 90-315mm,90-355mm,200-400mm, 200-450mm,250-500mm,315-630mm, 450-800mm,63-1000mm,710-1200mm, 1200-1600mm
Daily maintenance and maintenance of welding machine
17 May 2019
The electric welder uses the high-temperature arc generated by the positive and negative poles in an instant short circuit to melt the solder and the material to be welded on the electrode to achieve the purpose of combining them. The structure is very simple, it is a high-power transformer. The welding machine can be divided into two types according to the type of output power, one is AC power; the other is DC. It is made by the principle of inductance. When the inductance is turned on and off, it will produce a huge voltage change. The high-voltage arc generated by the positive and negative poles in the instant short circuit is used to melt the solder on the electrode to achieve the combination. The purpose of the welding machine can not be ignored during maintenance and maintenance. Electric welding machine routine maintenance 1. Check the welder output wiring specification, firm, and the outlet direction is close to vertical, and the angle with the horizontal must be greater than 7...
About the value of the welding machine
11 May 2019
1. Reasonable design and free adjustment. The electric welder can select different discharge frequencies according to different metal materials to achieve the best repair effect. 2. The heat affected area is small. There is no heat input during the instant of stacking, so there is no deformation, undercut and residual stress. Local annealing will not occur and no reheating is required after repair. 3. Very small welding repair impact, the electric welder overcomes the phenomenon of ordinary argon arc welding on the periphery of the workpiece during the welding repair process. It is also safe to repair the workpiece surface without any allowance. 4. High precision of repair: the thickness of surfacing is from a few microns to a few millimeters, just grinding and polishing. 5. Welding strength: Strong bonding force due to sufficient penetration into the surface material of the workpiece. 6. Using ring precision control, The electrode is used to melt the electrode and heat the base materi...
Analysis of the cause of electric shock on the load side of electric welding machine
05 May 2019
Direct cause analysis The kiln system Q235-A is made of steel and has good electrical conductivity. The main responsibility of the accident is that He has no special operation qualification certificate, which is an illegal welding operation. 1. He is ignorant of the most basic skills of electric welding operation. When welding, the left hand holds the hook nail, the right hand holds the welding handle, the welding hook is not in contact with the kiln body, and the load current passes through the lead wire, the welding rod, the welding rod, The hook nail, the human body, the kiln body, and the secondary side ground wire return to the electric welding machine to form a circuit for current circulation, so that the current passes through the human body, causing an electric shock death accident. If the hook of the weld is in direct contact with the kiln body, since the human body resistance is much larger than the resistance of the metal, the current through the human body is small (can be ...