Which parts are commonly used in CNC machining

CNC machining has a great influence on the hardware industry, and many companies that need to process parts will apply it to CNC machining. Because CNC machining can be applied to complex machining, high requirements and many processes, it takes several clamping and adjustment to complete the machining parts.

Usually the most commonly used parts in CNC machining are special-shaped parts, complex curved surfaces, box parts, special processing, plate sets and other parts.

1. Shaped parts

Formed parts are irregularly shaped parts, which are mostly processed by mixing points, lines and surfaces. Generally speaking, the rigidity of special-shaped parts is poor, the clamping deformation is difficult to control, and the machining accuracy is difficult to guarantee, and even some parts of the machining part are difficult to complete on ordinary machine tools. When using the machining center for processing, reasonable technological measures should be taken, one or two clamping, and the characteristics of multi-station point, line and surface mixed processing of the machining center should be fully utilized to complete multiple or all process contents.

2. Complex surfaces

In the machinery manufacturing industry, especially the aerospace industry, complex surfaces have special importance. It is difficult or even impossible to process complex surfaces with ordinary machines. The traditional method in China is to use the precision casting method, and it is conceivable that the precision is very low. Various impellers, wind guide wheels, spherical surfaces, various curved surface forming molds, propellers, underwater vehicle propellers and other complex surface parts, as well as some other shapes of free-form surfaces. There are the following typical comparisons:

a. Cam, cam mechanism

Widely used in various automatic machines, as a basic element for mechanical storage and transmission of information, it has various Various curved disc cams, cylindrical cams, conical cams, barrel cams, end cams, etc. For the processing of such parts, three-axis, four-axis or five-axis linkage machining centers can be selected according to the complexity of the cam;

b. For aero-engine compressors, oxygenation machines, single-screw air compressors, etc., for such parts, it can be completed by a four-axis or more linkage machining center;

c. Mould category

Such as injection mold, rubber mold, vacuum forming plastic mold, refrigerator foam mold, pressure casting mold, precision casting mold, etc. Using a machining center for mold processing, due to the high concentration of processes, the finishing of key parts such as movable molds and static molds is basically to complete all the processing content at one time, which can reduce the cumulative error of dimensions and reduce the repair workload. At the same time, the mold has strong reproducibility and good interchangeability. The remaining work of the fitter should be less, and all accessible parts should be completed by machining as much as possible, so that the work of the clamping workers is mainly polishing;

d. Spherical surface

Milling machining center available. Three-axis milling only needs ball-end milling cutter for approximate processing, which is less efficient, and can be processed by using end mill as an envelope surface. Machining complex surfaces with machining centers requires a large amount of programming work, and most of them use automated programming technology.

3. Box components.

Shell parts generally refer to parts with multiple holes, a cavity inside, and a certain proportion in the direction of length, width and height. Such parts are used in machine tools, automobiles, aircraft manufacturing and other industries. Box parts generally require multi-station processing and plane processing, with high tolerance requirements, especially for geometrical tolerances, which must be processed through milling, drilling, drilling, drilling, drilling, drilling, drilling, drilling, drilling , milling, drilling, drilling, drilling, drilling and other processes require more tools, and the machining accuracy requirements on ordinary machine tools are high, and tools that require multiple processing need to be replaced frequently.

Machining center for chassis parts, when there are many processing stations, the parts that need to be rotated several times on the worktable to complete the corners are generally selected horizontal boring and milling machining centers. When there are few processing stations and the spacing is not large, a vertical machining center can be selected to process from one end.

4. Special treatment

After mastering the functions of the machining center proficiently, use the machining center with certain molds and special tools It can complete some special process work, such as engraving, engraving and engraving patterns on the metal surface; installing a high-frequency EDM power supply on the main shaft of the machining center can perform line scanning surface quenching on the metal surface; using the machining center to install high-speed Grinding head, which can realize the grinding of small modulus involute bevel gears.

5. Discs, sleeves, plates

Curved disc sleeves or shaft parts, such as flanged, belted Shaft parts with keyway or square head, such as flanged shaft, shaft parts with keyway or square head, etc.; plate parts with multi-hole machining, such as various motor covers, etc. Disk parts with end faces and curved surfaces with distributed holes should be selected with vertical machining centers and optional horizontal machining centers with radial holes.

Through the above introduction, it is not difficult to see that CNC machining centers have a wide range of applications and many types of workpieces, so many companies are in the precision parts, CNC machining centers are required for the processing of molds, etc. This type of equipment is expensive and must be maintained during use.

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