Previously, I analyzed why we often choose CNC machining prototype models. If you are not clear, you can go and learn about the widely used CNC machining. Do you know what types of parts it can process?
Today, let's talk about which parts CNC technology can process!
As is well known, CNC machining centers are suitable for processing complex, multi process, high requirements, and require various types of ordinary machine tools and numerous tool fixtures, which require multiple clamping and adjustments to complete the machining of parts.
The main objects of its processing include box type parts, complex curved surfaces, irregular parts, disc sleeve plate parts, and special processing.
01
Box type parts
Box type parts generally refer to parts with more than one hole system, an internal cavity, and a certain proportion in the length, width, and height directions.
These types of parts are commonly used in industries such as machine tools, automobiles, and aircraft manufacturing. Box type parts generally require multi station hole system and flat machining, with high tolerance requirements, especially strict geometric tolerances.
The machining center for machining box type parts, when there are many machining stations and the workpiece needs to be rotated multiple times by the workbench to complete, generally chooses a horizontal boring and milling machining center.
When there are few processing stations and the span is not large, a vertical machining center can be selected for processing from one end.
02
Complex surfaces
Complex surfaces play a particularly important role in the mechanical manufacturing industry, especially in the aerospace industry.
It is difficult or even impossible to complete complex surfaces using ordinary machining methods. In our country, the traditional method is to use precision casting, which can be imagined to have low accuracy.
Complex curved parts such as various impellers, guide vanes, spherical surfaces, various curved forming molds, propellers, and propellers for underwater vehicles, as well as some other shapes of free surfaces.
The following are typical examples:
① Cams and cam mechanisms
As a fundamental component of mechanical information storage and transmission, it is widely used in various automatic machinery. Processing such parts can be done by selecting a three-axis, four-axis linkage, or a five axis linkage machining center based on the complexity of the cam.
② Integrated impeller type
These types of parts are commonly found in compressors for aircraft engines, expanders for oxygen production equipment, single screw air compressors, etc. For such surfaces, machining centers with four or more linked axes can be used to complete them.
③ Mold class
Such as injection molds, rubber molds, vacuum forming vacuum molds, refrigerator foam molds, pressure casting molds, precision casting molds, etc.
④ Spherical surface
Machining center milling can be used. Three axis milling can only use ball end milling cutters for approximate machining, which has low efficiency. Five axis milling can use end milling cutters as envelope surfaces to approximate spherical surfaces.
When machining complex surfaces with machining centers, the programming workload is large, and most require automatic programming technology.
03
Irregular parts
Irregular shaped parts are parts with irregular shapes, which mostly require mixed processing of points, lines, and surfaces at multiple workstations.
The rigidity of irregular parts is generally poor, and the clamping deformation is difficult to control. The machining accuracy is also difficult to ensure, and even some machining parts of certain parts are difficult to complete with ordinary machine tools.
When using a machining center for processing, reasonable process measures should be taken, such as primary or secondary clamping, utilizing the characteristics of mixed processing of multiple workstations, lines, and surfaces on the machining center to complete multiple or all process contents.
04
Plate, sleeve, and plate parts
Parts with keyways, radial holes, or holes distributed on the end face, curved disk sleeves or shaft parts, such as flanged shaft sleeves, shaft parts with keyways or square heads, as well as plate parts with more hole processing, such as various motor covers.
For disc-shaped parts with distributed hole systems and curved surfaces on the end face, it is advisable to choose a vertical machining center, while for radial holes, a horizontal machining center can be selected.
05
Special processing
After mastering the functions of the machining center proficiently, with certain fixtures and specialized tools, the machining center can be used to complete some special process work, such as engraving letters, lines, and patterns on metal surfaces.
Install a high-frequency electric spark power supply on the spindle of the machining center, which can perform line scanning surface quenching on the metal surface.
By installing a high-speed grinding head on a machining center, it is possible to achieve the grinding of small module involute bevel gears and various curves and surfaces.
