Accident prevention measures should aim to. · keep the tool in its rest position figure 86.15 and as far as possible in the working position figure 86.14, particularly where the part is maintained and fed by the hand. The machines to be conveyed must be designed to be able to work in complete safety. It shouldMake sure that. The electrical equipment complies with the safety rules Access to moving parts of the machine, such as belt drives, hydraulic or pneumatic router heads or mobile tables on self-feeding machines, are prevented by an adequate guard at The actual minute per minute changes of the tool are clearly visible to the operator
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All sources of ignition, including fires, electrical equipment and static electricity, should be eliminated before the start of operations. An active hazardous materials communication program should be in place to alert employees of all hazards created by toxic, reactive, corrosive and / or flammable chemicals, glue and solvents and protective measures to be taken. Eating in the presence of these chemicals should benot allowed.
The cutter block generally rotates at speeds between 4500 and 6000 rpm. The diameters of conventional milling cutters range from 56 to 160 mm and their lengths working widths from 200 to 900 mm. By analogy with the conventional machining kinematics, the surface of the part planed with a cutting block is composed of cyclo arches. The quality of the work surface therefore depends on the speed and diameter of the cutting block, the number of cutting blades and the speed of advance of the part.
Dust Control Most of the dust in a carpentry shop is eliminated by local exhaust systems. However, there is often a considerable accumulation of very fine dust that has been deposited on rafters and other structural elements, especially in areas where the sand §age is done. This is a dangerous situation, with great potential for fire and explosion. A clear fire on dusty surfaces may be followed by explosions of increasing strength.
Check motors and other electrical equipment often for overheating. Ensure that service or maintenance personnel lubricate motor bearings, conveyors, chains, and gears in a timely manner. Make sure electrical panels and boxes are kept closed and maintained to prevent dust build-up, including keeping all knockouts plugged in . Prohibit active smoking without permissiond locations. Adopt procedures for hot work permits and make sure the procedures are followed.
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