Best Preventive Maintenance Tips for Your CNC Machine Tools

 Why CNC Machine Tool Maintenance is Needed

CNC machine tools are not just durable heavy-duty performers – they also need to be extremely accurate to excel in their machining roles on your factory shop-floor.

Machine tools like lathes, milling machines, and multi-axis machining centres often perform multiple machining tasks. Many of these cutting, shaping and drilling tasks are highly complicated, and require specially designed software and hardware to execute. 

They require long uninterrupted periods of production to suit the unique manufacturing needs of factories – often these stretch for days and nights.

Because of the high levels of performance and long hours of operating and cutting needed for different metal parts and components, regular and preventive maintenance is needed. This will help your CNC machine tool to last longer, remain serviceable for a longer time frame, while maintaining the accuracy and quality of your machined parts.


The Benefits of Regular Maintenance for CNC Machine Tools

Are there any benefits in incorporating a programme of preventive and regular maintenance for your machine tools?

Let us list some of them down for you:

  • Help to steadily increase the profitability of your company
  • Prevent and reduce machine and production downtime
  • Improve and keep the productivity of the machine tool
  • Extend the lifespan of both your machines and cutting tools
  • Minimise or eliminate crashes or accidents that can be dangerous for operators
  • Increase efficiency by using less material and reducing scrap materials
  • Reduce and avoid hefty repair costs from unexpected break down of your machines

Now that you’ve learned what the benefits are, let us look at the steps you need to keep your machine tools in prime running condition.


Exclusive Article : 7 Major CNC Machine Tricks




Quarterly / Semi-Annual Maintenance Checklist for Machine Tools

On a quarterly or six-monthly basis, check that your coolant tanks, air reservoirs, pumps, and drainages for oil work smoothly. You can do so by making sure that they are clean and free to operate.

For example, your coolant tank may collect sludge over time if it isn’t cleaned regularly. Over time, this may not only reduce your overall tank capacity for coolant – it may affect the purity of your coolant and be detrimental to the performance of your spindle. 

This is particularly damaging if a CTS (Coolant Through Spindle) system is used. Fine chips and particles will be sucked through your CTS Pump, damaging it in time. Your machine’s toolholders and spindle cones may also be damaged.

To prevent such mishaps from happening, do the following every quarter or half-yearly: 

Have the coolant tank cleaned of sludge, chips, and oil

Have the chuck and jaws taken off the machine and cleaned

Have the levelling of your machine checked and adjusted if necessary

Have the radiator cleaned while making sure that the radiator fins are straight and not damaged

Have all way wipers inspected for any damage – clean and replace any wipers that are damaged

Have the hydraulic tank drained, and replace the hydraulic oil with fresh hydraulic oil. Do also ensure that the line filter and suction filter are changed.

Have the lubrication unit drained and cleaned out – thereafter you should add fresh way lubricant

If your machine is equipped with a cooling unit, have the cooling unit drained and refilled


Yearly Maintenance Checklist for Machine Tools

What about your annual maintenance schedule? How do you keep your machine tool in prime condition year after year?

First you need to note that the more axis your CNC Machine Tool has (like a 5-axis Machining Centre), the more critical it becomes to keep it aligned and calibrated. For such complex machine tools, you’ll need to check on the status of your machine beds, hydraulic systems, and spindle lubrication systems. You should also test to ensure that your machine tool accuracy and machine tool level can meet your requirements.

Here are some must-dos for your machine tool every year:

Have the spindle checked for radial and end play issues

Have the chuck cylinder checked for run out

Have the tailstock checked for misalignments and quill function

Have the turret parallelism and inclination checked

Have the whole machine checked for leakage of oil or air

Have the headstock checked for any damage or misalignments, and the spindle taper at milling machines

Have your distributor / supplier check the X, Y and Z axis gibs and adjust if necessary. Check in the same way the function of your 4th axis table

Have your distributor / supplier run a backlash program to check the backlash in X, Y and Z axis and adjust if necessary

On an annual basis, it is recommended to have a CNC machine check overall done in respect of levelling, accuracy and functionality. This should be done by the machine manufacturer service engineers or at least by well trained and factory certified dealer engineers. 

 These qualified professionals would know what to do and what to look out for – they will also have the equipment at hand to do the job properly.

Conclusion

As the saying goes, prevention is better than cure. Just like a human body, keeping your CNC machine tool in healthy running order will ensure its longevity, accuracy and productive use over the long-term.

Incorporating a regular maintenance schedule is thus a must for shop floors that deploy CNC machines for their production processes. 

Beyond keeping your machine in good running order, it is important to invest in high quality CNC machine tools that are easy to maintain, and which comes with good after-sales support.

Machine tools are built with a rigid, top quality, and long-lasting mechanical design. However, like your precious bodies, you need a programme of regular maintenance and care to keep them optimally running for a long time.

To learn more about US SHOP TOOLS service packages contact us for more information or to get a quote.

Comments

Popular posts from this blog

Round Jaws Supplier In USA

tongue and groove chuck jaws in USA

A Day In The Life Of A CNC Machine Operator