Heat treatment mesh belt furnace has been widely used in fasteners, bearings, transmission parts and other mechanical parts. With the improvement of the manufacturing technology level of mesh belt furnaces and the requirements of energy saving, the heating method of the third generation product of mesh belt furnaces - stick-type mesh belt furnaces has developed from heating by metal electric heating elements to heating by gas. The heat generation device of the electric heating mesh belt furnace usually adopts a radiant tube, which is composed of a metal outer tube and a built-in squirrel-cage heating element. Depending on the operating temperature, the material used in the radiant tube is also different.Vacuum annealing process of steel ring The heating element with built-in squirrel-cage structure is composed of metal electric heating elements and corundum insulating ceramic sheets. The metal heating element is a resistance wire, and its commonly used materials are nickel-chromium alloy wire and iron-chromium-aluminum alloy wire. After the nickel-chromium alloy wire is heated in the air, a layer of hard Crz03 protective film is formed on the surface and adheres to the alloy substrate. The melting point is higher than that of the alloy substrate. It can withstand alternating heating and cooling and has strong corrosion resistance.Heat treatment process of gear vacuum carburizing and quenching The heat generation device of the gas heating mesh belt furnace is commonly known as the gas burner. For the convenience of use, maintenance and energy saving, the high-speed burner enables the fuel and the combustion-supporting air to be completely burned in the combustion chamber. Spray into the furnace at a high speed, strengthen the convective heat transfer to the workpiece, promote the circulation of the air flow in the furnace, and achieve the purpose of uniform furnace temperature and improved heating effect.X6332 / X6336 SERIES UNIVERSAL TURRET MILLING MACHINE WITH HORIZONTAL The control of the gas burner is more complicated than that of the electric heating radiant tube. It needs to complete the flame detection in the furnace, automatic ignition control, gas supply control, combustion air control, etc. The combustion system adopts a ratio valve control method to make the gas/air ratio the best and reduce excess air.X715 / X716 BED TYPE MILLING MACHINE
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