Engineering

Safety Precautions By Operating for Machines

Written by Thalib Tantary

THE FOLLOWING PRECAUTIONS SHOULD BE TAKEN

1. DRILLING MACHINES

The spindles chucks and as much of tools as possible should be guarded. It should be ensure that all set screws are recessed. No neck ties, loose or flapping clothing, long hair styles or finger rings should be allowed. Spindles or chucks should be stopped by hand only after machine is switched off.

The work always be clamped securely to table. One should never attempt to hold work by hand while drilling. If work slips from clamp, the machine should be stopped. All burrs from drilled holes should be filed.

Properly sharpened drills should be used and it should be ensured that they are running true to avoid broken or splindered  drills. Correct speed should be selected and drill should be never forced or fed too fast. If drill stops in work, machine should be stopped and drill started by hand.

2. POWER PRESS

In order to avoid to tap between tool and die,  fencing should be secured and access to the danger zone should be out of reach of personnel. Guards should be kept in position whenever the press is under power, whether it is for production or for after setting up.

In order to avoid trap between ram and part of guard, care should be taken that guards are not so constructed that a trap exists between the ram or any projection on it and the guard itself improper functioning of the interlocks should be immediately reported.

3. GRINDING MACHINES

In order to avoid chattering of the wheel it should be tested correctly, mounted at the right tension (i.e., grip between flanges should be neither too tight nor too loose) and run at prescribed speed. If wheel chatters or vibrates, it should be stopped. The face of the wheel should be flat and under grooved. The face should be dressed with proper tool. Even pressure should be applied as the tool is moved smoothly across the face of the wheel.

To avoid contact with the wheel or trapping between the wheel and the machine casting the tool rest should be correctly set. Wheel should never be allowed to run when not in use, nor left unattended during the run down period after switching.

Eye protection i.e., fixed version type guard rigidly attached above the wheel itself, and goggles/spectacles should always be used.

4. MILLING MACHINES

It should be ensured that the cutter is sharp and in good condition. Guard should be in good condition and correctly adjusted. Arbor nut should not be loosened or tightened when machine is running. Setting of work should not be done in close proximity to cutter. The chips of metal or swarf should be removed by brush.

5. LATHES

Machine power should not be used for putting on or removing the chuck or face plate. Work should be properly clamped. No attempts should be made to adjust the tool or for measurement when the machine is running. Gear should be never changed when the machine is running. Strips of sand never be used for polishing work in lathes.

Wrench or other tool from the chuck should be removed before switching on machine. All stock bars must be adequately guarded for the whole of their length.

The correct location and working of the feed rod and its attachment should be ensured. Adequate clearances should be checked for and ways kept clear of materials and tools.

6. SHAPING MACHINES

The following precautions should be taken:

Properly secure in position the ram, tool head, vice versa, work and table support, clamping screws before starting machine, always check that the adjusting nuts are tight after setting the stroke length and position. Do not reach over or cross a machine whilst it is under power. Do not attempt to remove metal shearing or chips while the machine is moving and stand to the side of the ram, not in front of it.

About the author

Thalib Tantary

My name is Thalib Mushtaq Tantary and i am the founder of this very site. I am a medical or civil engineering student and i love to help people get out of trouble they counter in their lives.
Since most often students find it difficult to understand their text books or even there many who can not afford such books, therefore we prepared ourselves to solve this problem faced by them.

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