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Which parts often need CNC machining

Oct 29 , 2020

In fact, there are many parts commonly used in CNC machining. I will not list them one by one here. Let's make a detailed analysis of several commonly used parts. They are as follows:

1. Special-shaped parts

Special-shaped parts are parts with irregular shapes, and most of them require multi-station mixed processing of points, lines and surfaces. The rigidity of special-shaped parts is generally poor, the clamping deformation is difficult to control, and the machining accuracy is difficult to guarantee, even some parts of some parts are difficult to complete with ordinary machine tools. When machining with a machining center, reasonable process measures should be adopted, one or two clamping, and the characteristics of the machining center's multi-station point, line, and surface mixed processing should be used to complete multiple processes or all of the process content.

2. Discs, sleeves, plate parts

With keyway, or radial hole, or distributed hole system on the end surface, curved disk sleeve or shaft parts, such as flanged shaft sleeve, keyway or square head shaft parts, etc., and more porous Processed board parts, such as various motor covers, etc. Vertical machining centers should be selected for disc parts with distributed holes and curved surfaces on the end faces, and horizontal machining centers with radial holes are optional.

3. Special processing

After mastering the functions of the machining center, with certain tooling and special tools, the machining center can be used to complete some special process work, such as engraving, engraving, and patterning on the metal surface; installing a high High-frequency EDM power supply can perform line scan surface hardening on metal surfaces; the machining center is equipped with a high-speed grinding head, which can realize the grinding of small modulus involute bevel gears and the grinding of various curves and curved surfaces.

4. Box parts

Box parts generally refer to parts with more than one hole system, a cavity inside, and a certain proportion of length, width, and height. This kind of parts are used more in machine tool, automobile, aircraft manufacturing and other industries. Box-type parts generally require multi-station hole system and plane processing, with high tolerance requirements, especially the shape and position tolerance requirements are relatively strict, usually through milling, drilling, expanding, boring, reaming, countersinking, tapping and other processes , Requires more tools, difficult to process on ordinary machine tools, large number of tooling sets, high cost, long processing cycle, multiple clamping and alignment, manual measurement times, frequent tool replacement during processing, and difficult process , And more importantly, accuracy is difficult to guarantee. Machining centers for processing box-shaped parts, when there are many processing stations, the parts that require multiple rotations of the worktable to complete, generally choose horizontal boring and milling machining centers. When there are few processing stations and the span is not large, a vertical machining center can be selected to process from one end.

5. Complex surface

Complex curved surfaces occupies a particularly important position in the machinery manufacturing industry, especially the aerospace industry. It is difficult or even impossible to complete complex curved surfaces using ordinary machining methods. In our country, the traditional method is to use precision casting, it can be imagined that its accuracy is low. Complicated surface parts such as: various impellers, wind guide wheels, spherical surfaces, various curved surface forming molds, propellers and underwater vehicle propellers, and some other free-form surfaces.

approximation processing, which is less efficient. Five-axis milling can use end milling cutters as the envelope surface to approach the spherical surface. When complex curved surfaces are processed by machining centers, the programming workload is relatively large, and most of them require automatic programming technology.

CNC machining services is suitable for machining parts that are complex, have many procedures, and require high requirements, require multiple types of ordinary machine tools and many tool fixtures, and can only be processed after multiple clamping and adjustments. Shenzhen Mirdan-Tech is specialized in this industry, you can contact them if necessary.



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