1. Check whether the furnace body, furnace door, trailer, wire rope pulley and blower are normal before work, and whether there are unsafe factors such as collapse, breakage and cracking. If it is, it should be properly disposed before it can be opened. Annealing and metal plating on or near the wire should be carefully cleaned using an electric furnace.
2. When burning fire, carefully check the explosives in the coal. During the wind stop process, the coal seams must not be too thick to prevent gas explosion. The cinder removal should be handled at any time, and no backlog stacking is allowed.
3. Before loading and unloading, check whether there are obstacles on the track groove, whether the hooks, chains and other tools are reliable.
4. When loading and unloading large castings or thin-walled workpieces, be sure to level and stabilize. Spaces should be properly left between adjacent ones, and the loading height should not exceed the regulations.
5. Before the furnace is released, the refractory bricks and refractory mud on the furnace door should be cleaned and the pulling mechanism should be checked for ease of use.
6. When unloading and handling, unrelated personnel should not be close to both sides of the flat car, so as to prevent the sand box or workpiece from collapsing and injuring people. It is forbidden to rest or stack objects around the stove.
7. When the temperature of the working object is higher than 400 °C, it is forbidden to hoist with chain or wire rope (or take thermal insulation measures) to avoid breakage after annealing. The use of driving to lift work items shall comply with the safe operation procedures of driving and hooking workers.
8. When using the gas stove, the gas ignition sequence should be observed: firstly use compressed air to blow off the residual gas in the furnace, close the compressed air valve, ignite the pilot rod, slightly open the gas nozzle valve, and adjust the compressed gas and gas flow after burning the nozzle. To make it fully burnt. The order of the ceasefire is reversed, and it is strictly prohibited to reverse the order.
9. When baking in an oil furnace, the ignition sequence is: first close the damper, ignite the ignition rod, slightly open the throttle, and after adjusting, adjust the air valve and the throttle to make it fully burn, prohibiting "wind pressure oil".
10. When using a pulverized coal fuel furnace, it is forbidden to burn the furnace when there is something wrong with the blower or if there is crack in the pipeline.
11. Repair the electric furnace must cut off the main switch, hang up the warning sign "Someone is overhauled, no closing", or set up guardianship.
Classification of cast iron parts: According to the national standard, the gray iron castings (HT) are mainly classified as HT200\HT2500\HT300, ductile iron castings (QT), QT450\QT500\QT600\QT700, and spheroidal graphite castings compared with grey ones. Iron castings have better wear resistance and smaller deformation. Nearly several castings with higher quality requirements have begun to use the material of ductile iron.
A combination square is a toolused for multiple purposes in woodworking,stonemasonry and metalworking . It is composed of a ruled blade and one or more interchangeable heads that may be affixed to it. The most common head is the standard or square head which is used to lay out or check right and 45° angles.The combination square continues to be a commonplace tool in home workshops, construction jobsites and metalworking.
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