Common faults and troubleshooting methods for rock drills?

Fault conditions

Cause analysis

Method of exclusion

Number of piston impacts and

Reduced impact force

1. The wind pressure is reduced, and it is as low as 0.4MPa or less (leakage, multi-machine, pipeline resistance)

2, rock drill leaking

3, the shaft thrust is too large

4, the part of the air hole is blocked, the wind valve cylinder and other components wear

1. The pressure fan room ensures sufficient pressure to block the air leakage of the pipeline, reducing the number of tubes and the resistance of the elbow.

2, eliminate the air leakage at the wind rope joint, the pressure gauge test wind pressure

3, adjust the air leg angle and air intake

4, timely repair of replacement parts

Rock drill does not move or cylinder heat

1. There is dirt stuck in the wind flap or other rotating parts

2, piston damage

3, insufficient refueling

1. Send the minor repair station in time to remove or replace the necessary parts.

2, replace the piston

3. If you use the air duct to refuel, do not add too much fuel at a time, but you must work hard.

Normal impact but the brazier

Reduced or uneven rotation

The parts of the slewing mechanism are worn and the gap is increased. Such as the spiral groove of the auger and the spiral mother

Replace worn parts

Lack of water supply

1. The water needle or the center hole of the drill is blocked

2, the water needle is not long enough

3, the tail is broken, the water needle is broken or piled up

1. Overhaul the water supply pipeline to remove dirt

2. Check the soldering holes, water needles, and replace them when not in aeration.

3, the quality of the quenching quenching should not be too hard and too soft, replace the solder or water needle

The rock drill is working normally.

But the speed is reduced

1, the bit of the bit has been blunt

2, excessive pressure and moisture

3. Too much rock powder in the hole

4, water flows into the cylinder

5, the length of the shank is improper and the shoulder is not correct

1, sent to repair grinding, replace the bit

2. Release the water in the bent pipe of the air duct in time.

3, use water to strengthen drilling and purging

4, change the rubber pad

5, replace the first use qualified solder

The rock drill does not ring after disassembly and assembly

1, the parts are not cleaned

2, the replacement parts are of poor quality, the wind shape exceeds the tolerance

3, the long rod screws are loose and tight

4, when the disassembly and assembly of the duct joint into the foreign body

1, re-clean

2, re-examine, replace the non-conforming product

3, tight side of the screw

4, open the wind before taking over

The piston has a short service life.

There are defects and breaks at the impact end

1. The piston itself is of poor quality and the heat treatment is not good.

2, the hardness of the solder tail is too high, the end face is rough, the finish is the bottom

3. Wear inside the brazing sleeve, swaying at the tail, local stress

4, the pressure is too high, more than 0.6MPa

5, the time is short or empty

1, replacement parts

2, replace the solder to ensure the quality of the tail

3, replace the brazing sleeve

4, short-term local deflation

5, do not be too aggressive when starting, properly increase the shaft thrust

The powerful purging mechanism is out of order,

Weak powder discharge ability

The internal vent hole of the machine is blocked, such as the hole on the upper side of the cylinder.

Found pores blocked position, with iron wire or repair of the respective communication

Fengshui linkage mechanism fails

The water-filling sealing rubber ring is worn, the spring at the rear of the water-filling valve body is ineffective, the oil-filling valve sealing ring has poor oil resistance, the size is increased, the water pressure is too high, and the spring force is exceeded.

Replace the unqualified sealing ring, should use cyanide rubber products

Set pressure reducing valve, water pressure is reduced to below 0.3MPa

Air pressure is sufficient,

But the torsional moment is small

When the rotating ratchet mechanism is worn, the spring force of the rotating claw spring is weakened, and the internal teeth of the ratchet wheel are worn.

Disassemble and replace worn parts in time