What parts often require CNC machining?

CNC processing is a very popular processing technology in the hardware industry today. It has a high position in hardware processing. Many companies use CNC processing. So what are the parts commonly used for CNC processing? Let's take a look together.

In fact, there are many parts commonly used for CNC processing. I won’t list them one by one here. Let’s conduct a detailed analysis of several commonly used parts, including the following:

1. Special shape parts

Special-shaped parts are parts with irregular appearance, and most of them require mixed processing of points, lines and surfaces. The rigidity of special-shaped parts is generally poor, clamping deformation is difficult to control, machining accuracy is difficult to ensure, and some processing parts of some parts are even difficult to complete with ordinary machine tools. When processing with a machining center, reasonable process measures should be adopted, first- or second-hand clamping should be used, and the characteristics of multi-station, line and surface mixing of the machining center should be used to complete multiple processes or all process contents.

2. Disk, sleeve, board parts

With keyways, or radial holes, or distributed holes on the end surface, curved disc sleeves or shaft-type parts, such as shaft sleeves with flanges, shaft-type parts with keyways or square heads, etc., and more holes Processed plate parts, such as various motor covers. For disc parts with distributed hole systems and curved surfaces on the end surface, vertical machining centers should be selected, and horizontal machining centers with radial holes should be selected.

3. Special processing

After mastering the functions of the machining center, with certain tooling and special tools, the machining center can complete some special process work, such as engraving, engraving lines, and engraving patterns on the metal surface; installing a height on the spindle of the machining center Frequency electric spark power supply can perform linear scanning surface quenching on metal surfaces; high-speed grinding heads are installed with a machining center, which can achieve small-module involute bevel gear grinding and grinding of various curves and surfaces.

4. Box parts

Box-type parts generally refer to parts that have more than one hole system, have a cavity inside, and have a certain proportion in the length, width and height directions. This type of parts is used more frequently in the machine tools, automobiles, aircraft manufacturing and other industries. Box parts generally require multi-station hole systems and plane processing, with high tolerance requirements, especially the shape and position tolerance requirements are relatively strict, and usually have to go through milling, drilling, expansion, boring, reaming, counteracting, tapping and other processes. , requires a lot of tools, and it is difficult to process on ordinary machine tools, with many sets of tool sets, high cost, long processing cycle, multiple clamping and correcting, and many manual measurements. Tools must be replaced frequently during processing, making it difficult to formulate the process. More importantly, the accuracy is difficult to guarantee. For machining centers for machining box parts, when there are many processing stations and parts that require multiple rotation angles of the workbench to complete, a horizontal boring and milling machining center is generally selected. When there are fewer stations for processing and the span is not large, a vertical machining center can be selected to process from one end.

5. Complex surfaces

Complex surfaces occupy a special important position in the machinery manufacturing industry, especially the aerospace industry. It is difficult or even impossible to complete complex surfaces using ordinary machining methods. In my country, the traditional method is to use precision casting, and it can be imagined that its accuracy is low. Complex curved surface parts such as: various impellers, wind guide wheels, spherical surfaces, various curved surface forming molds, propellers, underwater vehicle thrusters, and some other shapes of free curved surfaces. The following are the most typical:

①Cam, cam mechanism

As a basic element for mechanical information storage and transmission, it is widely used in various automatic machinery. Such parts include disc-shaped cams, cylindrical cams, conical cams, barrel cams, end-face cams, etc. of various curves. When machining such parts, you can choose a three-axis, four-axis linkage or a five-axis linkage machining center according to the complexity of the cam;

② Overall impeller

This type of parts is commonly found in compressors of aircraft engines, expanders of oxygen-making equipment, single-screw air compressors, etc. For such a profile, it can be completed by using a machining center with four axes or more;

③Mold type

Such as injection molds, rubber molds, vacuum forming blister molds, refrigerator foam molds, pressure casting molds, precision casting molds, etc. The machining center is used to process the mold. Since the process is highly concentrated, the finishing of key parts such as dynamic molds and static molds is basically completed in one installation, which can reduce the cumulative size error and reduce the repair workload. At the same time, the mold has strong reproducibility and good interchangeability. The workload left to the fitter by mechanical processing is small. Wherever the tool is accessible, it is done by mechanical processing as much as possible. In this way, the workload of the mold fitter is mainly in polishing;

④Spheric

Milling can be used with machining center. Three-axis milling can only be used for approximation processing with ball head milling cutters, which is relatively low in efficiency. Five-axis milling can use end milling cutters as envelope surface to approximate the spherical surface. When complex surfaces are processed in machining centers, the programming workload is large, and most of them require automatic programming technology.

CNC machining is suitable for parts that are complex, have many processes, high requirements, require a variety of types of ordinary machine tools and many tool fixtures, and can only be processed after multiple clamping and adjustments. Dongguan Ruibang Technology is specialized in this industry. If you need it, you can leave a message on the official website.