The Simplest Maintenance Method for A Radial Drilling Machine

The common faults of the radial drilling machine can be quickly dealt with through the following simple maintenance methods with low threshold and less disassembly. Most daily usage problems can be solved without complex operations

Ⅰ. Simple electrical maintenance

The main motor cannot start ‌ : First, make sure the main power switch is closed, check if the wiring of the start button is loose, and then use sandpaper to grind the oxidized contacts of the contactor to restore it.

Abnormal noise due to phase loss in the motor ‌ : Cut off the power, check if the fuse has blown, replace it with a fuse of the same specification, and tighten the loose terminals in the motor junction box.

If the ‌ motor cannot stop ‌ : Disconnect the main power supply, separate the moving and static contacts of the contactor fusion welding, grind them flat and then reassemble.

Reverse the lifting direction of the rocker arm ‌ : By swapping the phase sequence of any two incoming lines of the main motor, the direction of action can be corrected.

Ⅱ. Simple maintenance of mechanical clamping type

The ‌ spindle box cannot be clamped tightly ‌ : Loosen the locking screw of the insert strip, adjust the regulating screw to make the guide rail fit clearance ≤0.04mm, and then re-lock the screw.

The column cannot be clamped tightly ‌ : Fine-tuning the adjusting screw on the spring plate to ensure that the rhombic block is fully pressed against the inner and outer conical surfaces, and finally locking the top safety nut.

rocker arm lifting jamming ‌ : Clean the metal chips on the guide rail surface, apply a small amount of pressure-resistant lithium-based grease on the lead screw surface to eliminate transmission resistance.

Ⅲ. Simple Maintenance of Common Minor Faults

Oil leakage from the main shaft/housing ‌ : Drain the excess oil from the oil pool and keep the oil level at the center mark of the oil gauge to stop the oil overflow.

overall machine operation vibration ‌ : Tighten all loose locking screws of the motor base plate, spindle box and column one by one to eliminate the vibration source.

Large radial runout of the ‌ main shaft ‌ : fine-tuning the lock nut of the main shaft assembly, adjusting the preload of the bearing to an appropriate tightness, and restoring the rotational accuracy.

The cooling pump does not discharge water ‌ : Replenish the coolant to cover the water inlet of the water pump, and clean the clogged metal filter screen at the water inlet.

Unstable spindle speed ‌ : Adjust the tension of the drive belt. Press the middle part of the belt to control the sinking amount within 10-15mm to prevent slippage and loss of rotation.

Ⅳ. Simple Maintenance of hydraulic systems

Insufficient pressure in the hydraulic system ‌ : Use a pressure gauge to measure the pressure at the pump outlet and adjust the pressure of the relief valve to the standard range of 0.8-1.2MPa.

The ‌ control panel does not rotate smoothly ‌ : disassemble the valve body, clean the oil stains and rust on the valve core with kerosene, and reassemble it to rotate smoothly.