What are the safe operating procedures for hand-held electric tools?

(1) Class II hand-held electric tools should be used in general places and should be installed with a leakage protector with a rated electric shock operating current of no more than 15mA and a rated operating time of less than 0.1s. If Class I hand-held electric tools are used, zero connection protection must also be provided. Operators must wear insulating gloves, wear insulating shoes or stand on insulating mats.

(2) When operating in wet places or on metal structures, class II hand-held electric tools must be used, and splash-proof leakage protectors must be installed. Class I hand-held power tools are strictly prohibited.

(3) Class III hand-held power tools with isolation transformers should be used in narrow places (boilers, metal containers, trenches, pipelines, etc.); if class II hand-held power tools are used, splash-proof leakage protectors must be installed. Install the isolation transformer or earth leakage protector outside the narrow place, and should be supervised by someone when working.

(4) The load wires of hand-held electric tools must use weather-resistant rubber-sheathed copper-core soft cables without joints. The use of plastic flower wire is prohibited.

(5) Machines using cutting tools should be sharpened, intact, installed correctly, firm and reliable.

(6) For machines using grinding wheels, check the soft pad between the grinding wheel and the connecting plate and install it firmly. The nuts must not be too tight. Do not dry the wet grinding wheel for use.

(7) Electric tools with double insulation or reinforced insulation must be used when working in humid areas or in places with good electrical conductivity such as metal structures, pressure vessels, and pipelines.

(8) Motors and electrical appliances with non-metal shells should not be subjected to pressure, moisture, or solvents such as gasoline during storage and use.

(9) The inspection before operation shall meet the following requirements:

a. There are no cracks or damage in the shell and handle;

b. The cable cords and plugs are intact, the switch action is normal, and the protective zero connection is correct, firm and reliable;

c. The protective covers of all parts are complete and firm, and the electrical protection devices are reliable.

(10) After the machine is started, it should run without load, and it should be checked and confirmed that the linkage of the machine is flexible and unimpeded. When working, the afterburner should be steady and not too hard.

(11) Overloading is strictly prohibited. Pay attention to the sound and temperature rise during the operation, and stop the machine immediately for inspection if any abnormality is found. When the working time is too long and the temperature rise of the machine tool exceeds 60°C, it should be shut down and allowed to cool down naturally before starting work.

(12) During the operation, do not touch the cutting tools, molds and grinding wheels with your hands. If you find that they are blunt or damaged, you should immediately stop the machine for repair or replacement, and then continue the operation.

(13) When the machine is turning, do not let it go.

When using an impact drill or electric hammer, the following requirements should be met:

a. You should grasp the handle of the electric drill or electric hammer during operation. When drilling, put the drill bit against the working surface first, and then start it with moderate force to avoid shaking; if the speed drops sharply, reduce the force to prevent the motor from overloading. pressure;

b. When drilling, care should be taken to avoid steel bars in the concrete;

c. Electric drills and electric hammers are 40% intermittent duty, and should not be used continuously for a long time;

d. When the operating aperture is above 25mm, there should be a stable operating platform and guardrails around it.

(14) The following requirements should be met when using the tile cutting machine:

a. During operation, sundries and dust should be prevented from mixing into the motor, and the temperature of the casing should be observed at any time. When the temperature of the casing is too high and carbon brush sparks are generated, stop the motor immediately for inspection and treatment;

b. The force should be uniform and appropriate during the cutting process, and the force should not be too strong when advancing the blade. When the blade is stuck, stop the machine immediately, withdraw the blade slowly, and cut again after re-aligning.

(15) When using an angle grinder, the following requirements should be met:

a. The grinding wheel should be made of reinforced fiber resin, and its safe line speed should not be less than 80m/s. The matching cables and plugs should have reinforced insulation performance and cannot be replaced arbitrarily;

b. During the grinding operation, the grinding wheel and the workpiece surface should be kept at an inclined position of 15° to 30°; during the cutting operation, the grinding wheel should not be inclined or swing laterally.

(16) The following requirements should be met when using electric shears:

a. Adjust the clearance of the cutter head according to the thickness of the steel plate before operation;

b. Do not use too much force during the operation. When the reciprocating frequency of the cutter shaft drops sharply, the thrust should be reduced immediately.

(17) The following requirements should be met when using a nail gun:

a. It is strictly forbidden to push the nail tube with the palm of your hand and point the muzzle at the person;

b. When firing, the nail gun should be pressed vertically on the working surface. When the trigger is pulled twice and the bullets are not fired, the original shooting position should be kept for a few seconds, and then the nail gun should be withdrawn;

c. No nail cartridges should be in the gun until parts are replaced or the gun is disconnected.

(18) When using a riveting gun, the following requirements should be met:

a. The rivet hole on the riveted object should be fitted with the rivet smoothly, and the interference should not be too large;

b. When riveting, when the rivet shaft is not broken, the trigger can be repeatedly pulled until it breaks, and it is not allowed to forcibly twist or pry off;

c. During the operation, if the riveting head or the cap is loose, it should be tightened immediately.