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What is the Difference Between Rough Cutting and Finishing Cutting in CNC Machining Parts?

What is the Difference Between Rough Cutting and Finishing Cutting in CNC Machining Parts?

In the manufacturing process of CNC machining parts, the most commonly used processing methods are milling and turning, which are collectively referred to as cutting. There are two types of cutting processing in CNC lathe processing plants, which are called "rough cutting" and "fine cutting". So, what is the specific difference between rough cutting and fine cutting in CNC machining parts?


1. Rough cutting in CNC machining parts


The CNC machined workpiece is very close to the required shape and size after "rough cutting", but there is still enough metal allowance on the machined surface for finishing, so that the surface of the workpiece is smooth and the size is accurate.


Generally speaking, in the process of CNC machining, steel bars, forgings, castings, etc. can achieve the required shape and size with only one rough cutting and one fine cutting. However, sometimes some parts of a machine part may require more than one rough cut. For some hardware CNC machining parts, if the precision is not high or the amount of metal to be removed is small, it may only need one fine cutting.


For rough cutting, the cutting force must be considerable because most of the residual material is removed, which means that the entire machine, tool, workpiece or all three must be able to withstand it. The purpose of rough cutting in CNC machining parts is to remove excess material as quickly as possible. The remaining machined surface should not be too rough. Slender workpieces cannot resist bending and cannot damage the tip.


2. Fine cutting in CNC machining parts


Fine cutting is to make the workpiece surface smooth and dimensionally accurate, so it is a finer cutting. Finishing emphasizes precision - using very sharp tools, less metal is removed and higher precision is required when measuring.


Whether the machining method of CNC machining parts is rough cutting or fine cutting, CNC machining workers must set the rough cutting and fine cutting steps according to the pre-established process, and adjust the machine tool. The size and shape of the workpiece, the type of material, the type of tool, and the nature of the cut to be cut must be considered. Then start to adjust the machine to the correct speed and feed, and adjust the tool to achieve the required depth of cut.


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