Top 5 Signs of a Worn-Out CNC Machining Tool

June 9, 2022

Various industries today prefer computer numerical control (CNC) machining due to its associated benefits. CNC machining, for instance, can automate everything, which makes industrial processes be done in a short time. The automation of CNC machining also cuts costs and demand for manual labour.

The tools used for CNC machining can also be versatile. Dies, blades, and punches are only some of the tools that can enjoy the benefits of CNC machining.

These tools, however, can eventually wear out, especially if they are being utilised for a long time. Without replacing the worn-out tools right away, they could lead to increased machining force, higher machining temperature, decreased parts accuracy, and diminished surface quality. If your CNC machining tools manifest the following signs, they may have worn out already.

  1. Chipping

One of the prominent signs of worn-out CNC machining tools is chipping. Chipping can often be spotted on the cutting face of the tools. As chipping worsens, your tools may gradually obtain rough or marred cutting edges. Most of the time, this issue occurs whenever the tools are not set up properly. The tool holder may not likewise function properly, preventing it from keeping the tools correctly.

  1. Fracture

Another sign of worn-out CNC machining tools is the presence of a fracture. If the cutting forces between your tools and the workpiece have excessively increased and become too much, the latter may not work optimally anymore. The workpiece and the machine could then become damaged. Fractures can be mitigated if your settings for cut depth, speed, and material feed are set optimally. Aside from excessive cutting forces, fractures may also occur to your tools due to hot spots along the workpieces.

  1. Notching

If your machining tools come into contact with the shoulder of your workpieces, their interaction may generate a chemical reaction in the tools. Subsequently, this reaction can introduce abrasion and adhesion to the tools until they attain flank wear. As the wear increases, your machining tools may ultimately fail to work and operate anymore.

  1. Thermal Cracking

Whenever your machining tools and workpieces interact, they normally generate excessive heat. At most times, this heat can be managed by applying the correct machining speed, setting up the tools appropriately, and utilising the correct amount of fluid. If the heat, alternatively, becomes too high or too low, the workpieces’ performance characteristics can be severely affected. As for the tools, they can obtain some cracks that can later cause the end of their service life.

  1. Plastic Deformation

Plastic deformation is another sign that your machining tools have worn out already. Plastic deformation is a thermal issue whenever the machining tool materials have softened. This issue happens whenever the material grade of the workpieces is higher than the machining tools. Once your machining tools process these types of workpieces, their shape changes. Their sharpness may also get lost.

If you want to replace your worn-out machining tools, you can call us at Gunna Engineering.

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