Drilling and Tapping in CNC Machining Operations

25 February 2021

Manufacturing and industrial plants utilise computer numerical control (CNC) machining in controlling different tools and carrying out numerous processes. CNC machining is a process that utilises different computerised controls and machine tools to effectively remove parts of material from a workpiece and subsequently produce a custom-design product. Some materials that can be processed by CNC machining are metals, wood, plastics, glass, and composites.

All the controls and tools that are involved in the said process can all be regulated by a CNC machine. It is a programmable machine that can carry out different CNC machining operations. What makes CNC machining recommended for both manufacturing and industrial applications is that it can demonstrate a very precise and accurate production of parts.

Several CNC machining operations can be maximised by different industries. Two of these operations include drilling and tapping.

Drilling

Drilling is a CNC machining process that can make the cutter move and rotate to effectively cut certain parts of the workpiece. During the process of drilling, the workpiece is intended to stay in place the whole time as the cutter moves and produces round holes. The process of drilling is often carried out by CNC milling machines and lathes and can be used against metals, wood, plastics, and other rigid materials.

To carry out the drilling process, the operator must upload and access first the computer-aided design (CAD) or computer-aided manufacturing (CAM) file for any modification. Afterwards, the operator must install the correct drill bit and subsequently place the workpiece on the table. Once everything is set, the drilling process can now start by accessing the control panel.

What is great about CNC drilling is that it can offer accurate results and yield lower expenses across different applications and industries. It is also versatile as different types of drill bits can be maximised. The overall production of CNC drilling is likewise uninterrupted, maximising productivity and performance.

Tapping

Tapping, alternatively, is a CNC machining that can effectively cut a thread inside a hole so it can fit in and be threaded with cap screws or bolts. It can also be utilised to generate thread on nuts. For tapping to be effective, it must maximise a proper size tap drill for more precise dimensions. The use of oil is likewise crucial so that it can keep the drill bit from squealing and generate a smoother cut.

Similar to drilling, the tapping process also relies on CAD or CAM files for more accurate results. The operator must also select the proper size tap drill so that it can yield great results. As the workpiece is mounted on a specific surface, the speed and all other factors will now be set through the control panel. The tap feed and speed heavily rely on the manufacturer, which is why the operator should study them.

What is great about the tapping process is that it can be simpler compared to other CNC machining processes. It can also carry out the process faster, especially if the setup of the machine is done correctly. Tapping can likewise produce deeper holes, even with the use of harder materials like steel.

For more information about drilling and tapping, feel free to contact us at Kinetic Engineering.

 

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