Characteristics of CNC milling – machining complex parts

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CNC machining is one of the most common manufacturing processes. This is mainly due to its high accuracy, high accuracy and strict tolerance range. In fact, through numerical control processing, parts of the same size can be accurately manufactured in small batches, and the tolerance as small as a few tenths of a millimeter can be realized. There are many types of NC machining, including NC milling and NC turning. This paper will mainly introduce the characteristics of NC milling and the parts suitable for NC milling.

CNC milling is a kind of processing technology, which uses rotary tools to remove excess parts of material blocks until the required customized shape is formed. In addition, NC milling can not only meet the strict tolerance requirements of parts, but also process very complex parts. After continuous transformation and improvement, CNC milling can produce precision parts that meet the strict requirements of today’s demanding industries.

CNC milling is mainly used for material reduction manufacturing. The parts to be milled are fixed in the fixture on the CNC workbench, and then the raw materials are processed by the X, y and Z axes of the CNC milling machine, and the tool spindle is rotated at a very high speed to cut the materials, so as to achieve the ideal parts.

Characteristics of CNC Milling
The application of CNC milling is flexible and diverse. It is applied to the processing of various parts with different structures and complex shapes. Drilling, boring, milling plane, milling end face, tapping and other processes can be completed on the NC milling machine. In addition, NC milling has high precision and high repetition precision, which can meet the requirements of high-quality machining. Numerical control milling effectively avoids human operation errors and effectively maintains the consistency of part size during small batch processing.

The CNC milling machine has the functions of drilling machine and boring machine. In the multi variety and small batch production line, CNC milling is used to centralize the processing process, which not only improves the production efficiency but also reduces the error rate of parts clamping. In addition, NC milling also has the functions of fast forward, backward and fast positioning of tool rest, thus reducing the maneuvering time.

CNC milling can also process complex profiles that are difficult to be processed by CNC lathes, even the plane curve profile and spatial surface profile of parts. This is because NC milling has the characteristics of multiple feed coordinates and feed axis linkage.

What Are The Parts Suitable For CNC Milling?
Compared with conventional machining, NC milling has the characteristics of high machining accuracy, machining complex shape parts and wide machining range. According to the characteristics of NC milling, we can roughly understand that the parts suitable for NC milling mainly include the following types.

1. Parts with complex structure such as curve profile or curved surface: plane curve profile of parts, i.e. parts with internal and external profiles are complex curves, and the machining surface is parallel or perpendicular to the horizontal plane. In 3D space coordinates, the surface of a part is usually a point change on the surface. It is usually designed by mathematical models. In the process of machining, the milling cutter always keeps point contact with the machining surface. The three-dimensional NC milling is usually used to process the surface of parts, because it needs to be programmed and processed by the NC system.
2. Structure of parts difficult to be machined by ordinary milling: for parts difficult to observe and control such as dimension, scribe line and inspection, the ordinary milling machine has no CNC system to assist in machining. Therefore, it is very suitable to choose CNC milling machine for these parts.
3. The precision and accuracy of ordinary milling machine cannot be reached: because there are errors caused by human factors in ordinary milling, it is difficult to ensure the dimensional accuracy, shape accuracy and surface roughness of parts. Therefore, if the precision of the parts is high, it needs to be processed with a CNC milling machine.

The article mainly introduces the characteristics of NC milling. Reading the full text, you can understand that the application of NC milling has flexible and diverse characteristics. It is applied to the processing of various parts with different structures and complex shapes. Drilling, boring, plane milling, end milling, tapping and other processes can be completed on the NC milling machine. In addition, the paper also introduces that NC milling is applicable to the machining of complex structures such as curve contour or curved surface and the parts that are difficult to be machined by ordinary milling machines.

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