Welding Gun

1. The ring and accessory provided for welding gun to ensure the operation on working site, steel ball bearing turnplate can rotate 360 degree horizontally and vertically Hook provided for welding gun, to be electroplated.Limit of temperature rise: at working status of 200KVA suspension spot welding machine, except for electrode of welding gun, the working temperature of other touchable parts shall not exceed 60 °C.Water system The rated pressure of water in welding gun specified as 0.4Mpa, pressure withstand capacity shall not be less than 0.6Mpa. When outlet of water is closed, the inlet shall be applied with 0.5Mpa water pressure for 10 minutes, all parts and joint of the water system in welding machine shall not occur to water leakage. Gas system Rated pressure of gas system in welding gun shall be 0.5Mpa All parts and joint in air system of welding gun shall work reliably under 1.2Mpa, without air leakage, and air pipe shall be of oil proof. The concentric error of two electrodes of welding gun shall be +0.3mm at the pressure of 0.6Mpa. Deflection of gun arm shall be less than 1:100 at 0.7Mpa pressure The welding gun shall be able to freely and agilely closed 55 60 times per minute at the pressure of 0.1Mpa. Central offset of electrode: the maximum at electrode contact of two electrode central lines is 0.5mm while electrode applied with rated pressure.Conductivity The total resistance of welding gun electrode arm (the sum of electrode arm resistance from terminal of kickless cable to terminal of electrode) shall not be more than 300μφ. Test voltage 1700V, 50Hz applied between gun arms, gun arm to ring for 2 minute, it shall have no flashover and breakdown. The stiffness and strength of electrode arm can meet with the working requirement, to ensure it has no distortion and break during operation, the stiffness is estimated by way of measuring the error of electrode contacting surface, while the pressure withstood between electrodes rise up from 30% to 100% rating, the error offset between the central of electrodes shall not exceed 0.5mm.Pushbutton: click type pushbutton, the pushbutton shall be operated agilely, the function shall be reliable, during its continuous pushing, the block shall not occur.Ring: the ring of welding gun shall withstand static load equal to 10 times of actual load.Turnplate: constructed of steel ball bearings, to ensure rotating agilely and reliably.Surface and assembly quality: Except for frictional parts, all ferrous metal parts in welding gun shall be galvanized, oxidized or painted. The layer of galvanized parts shall be even and fine, have no vesicle and slough, the oxidization film of oxidized parts shall be even and full, have no severe damage, the surface of painted part shall be smooth and complete, without no crack and vesicle. All parts of welding gun shall be assembled securely and can be operated agilely. The surface of welding gun shall be shot blasted and grinded, coating is not allowed.The material of welding gun: gun body made of Chromium Zirconium copper or brass, adopted high strength shot blasting technology, the castings shall not have trachoma, sand, shrunk hole, looseness, crack and etc defects, surface is smooth without burr and polluted oil.Electrode arm constructed of cold bent Chromium Zirconium copper, electrode cap made of cold extruded Chromium Zirconium copper, the processed electrode arm and cap have high stiffness, strength, good conductivity. And electrode cap, pole, socket has same sizes for interchangeability. The taper between electrode pole, electrode and welding gun is 1:10The working life of main parts (at normal working conditions)(1) Cylinder, piston, piston rod and etc, all parts of complete cylinder: more than 2 years. (2) Electrode arm: more than half a year. (3) Gun arm: more than 3 years. Others not mentioned shall comply with National standardsNote: (1) Connector for water and air pipes applies for complete set type loose joint; (2) The connector of water and gas nozzles made of stainless steel.