What are the points for attention in the daily maintenance of the knife die bottom die machine?

The routine maintenance of the knife die bottom die machine is the key to ensure the accuracy of the equipment, prolong the service life and reduce the downtime, which needs to be carried out around mechanical parts, electrical systems, auxiliary devices and other aspects. The specific precautions are as follows:

A, mechanical parts maintenance

Guide rail and slider

Cleaning and lubrication: clean the dust and debris on the surface of the guide rail with a brush or an air gun every day before starting the machine (to prevent particles from scratching the guide rail), and add special lubricating oil for the guide rail (such as No.32 hydraulic oil) every week according to the instructions to ensure the smooth movement of the slider without jamming.

Check the clearance: check the clearance between the guide rail and the slider every month. If it is found to be loose or abnormal, adjust the lock nut in time (too large clearance will lead to a decrease in machining accuracy).

Spindle system

Cooling and cleaning: clean the dust in the spindle cone hole after each machining to prevent the positioning of the cutter from being inaccurate when installing; Regularly check the spindle cooling system (such as water cooler) to ensure that the coolant level is sufficient and the circulation is normal, so as to avoid overheating of the spindle (if the temperature rises above 40℃, stop the machine for inspection).

Rotational speed test: idling the spindle every week to test whether there is abnormal vibration or noise at different rotational speeds. If abnormal noise is found, it may be that the bearing is worn and needs to be replaced in time.

Worktable and fixture

Cleaning and fixing: clean the crumbs and oil stains on the workbench every day, and check whether there are foreign objects in the T-shaped groove (to avoid positioning deviation when clamping the workpiece); Tighten the connecting bolts of the workbench regularly to prevent looseness during operation.

Fixture maintenance: Check the clamping force of the fixture. If it slips or loosens, replace the worn clamping jaw or adjust the air pressure/hydraulic parameters (pneumatic fixture should ensure that the air pressure is stable at 0.5-0.8MPa).

Second, the electrical system maintenance

Power supply and line

Line inspection: check whether the power cord and signal cord are damaged or aging, and whether the connectors are loose (especially the cables in the towing chain to avoid being broken due to repeated movement), and replace them immediately if problems are found.

Grounding protection: test the grounding resistance (≤4Ω) every month to ensure reliable grounding and prevent leakage or interference with equipment signals.

control system

Cleaning and heat dissipation: clean the dust in the control cabinet with compressed air every week (to avoid accumulation affecting heat dissipation), and check whether the fan operates normally; Touch screen or operation panel should be wiped with a soft cloth to avoid using corrosive liquids such as alcohol.

Parameter backup: Back up the machining parameters and programs in the control system regularly (for example, monthly) to prevent accidental loss (it can be stored through USB flash drive or special software).

Motor and driver

Temperature monitoring: observe the temperature of the motor shell during operation. If it exceeds 60℃ (feel hot), stop the machine to check whether it is caused by overload or poor heat dissipation; Check the carbon brush of the motor every month (if it is a brushed motor), and replace it in time when the wear exceeds 1/2.

Third, the auxiliary system maintenance

Pneumatic/hydraulic system

Air source treatment: check the pressure gauge of air compressor every day to ensure the air pressure is stable (0.5-0.8 MPa); Drain water every week (valve at the bottom of the gas storage tank), clean the pneumatic triplex (filter, pressure reducing valve and oil mist sprayer), and the oil mist sprayer needs to be filled with special pneumatic lubricating oil (the oil quantity is kept at 1/2-2/3 level).

Hydraulic system: check the oil level of the hydraulic oil tank every month, replenish the same type of hydraulic oil (such as No.46 anti-wear hydraulic oil) when it is insufficient, replace the hydraulic oil once a year and clean the oil tank (to prevent the valve body from being blocked due to oil pollution).

Cooling and dust collection system

Cooling system: clean the impurities in the cooling water tank every week, replace the coolant (generally every 2-3 months, adjusted according to the water quality and processing capacity), and check whether the water pipe is blocked and the nozzle is aimed at the processing area.

Dust collection device: clean the dust bag or filter element daily (to avoid blockage affecting suction), and check whether the dust collection pipeline leaks air every month to ensure the dust collection effect.

Fourth, the maintenance of tools and consumables

Tool inspection: before each use, check whether the tool (such as milling cutter and drill bit) is worn or broken, and whether the handle is fastened, so as to avoid personal injury or impact on accuracy when machining.

Tool storage: Idle tools should be cleaned and put into a special tool magazine to avoid rusting due to moisture or collision and damage to the cutting edge.

V. Safety and Environmental Maintenance

Safety device inspection: daily confirm that the emergency stop button, protective cover, photoelectric sensor and other safety devices are functioning normally, and repair or replace them immediately if any damage is found (it is forbidden to dismantle the safety device operation equipment).

Environmental finishing: keep the equipment clean and tidy, avoid piling up sundries (especially flammable materials), clean up the ground oil stains in time (to prevent slipping), and control the environmental humidity at 40%-60% (to prevent electrical components from getting wet).

Six, regular maintenance plan (reference)

Key contents of maintenance cycle

Clean the guide rail and workbench every day, check the air supply/power supply and test the emergency stop.

Add lubricating oil every week, clean the cooling system, and check the tool condition.

Check the gap of guide rail, spindle temperature and grounding resistance every month, and back up the parameters.

Change the hydraulic oil/coolant every quarter, check the motor carbon brush and tighten the bolts.

Professionals overhaul the spindle bearing and control system every year to calibrate the accuracy.

Summary of precautions

During maintenance, power and gas must be cut off, and a warning sign "under maintenance" should be hung to avoid misoperation.

Use consumables recommended by the original factory (such as lubricating oil and hydraulic oil) to avoid the damage of parts caused by mixing different models.

Operators need to record the running state of the equipment (such as abnormal noise and precision deviation) and feed it back to the maintenance personnel in time to avoid the expansion of minor faults.

Through standard daily maintenance, the failure rate of the knife die bottom die machine can be significantly reduced, and the stability of machining quality can be ensured.