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What kind of products need CNC processing? What is CNC
2025-05-15
CNC (computer numerical control) is the abbreviation of computer numerical control, which is an automated machine tool controlled by a program. The control system can logically process programs specified by control codes or other symbolic instructions, decode them through computers, so that the machine tool can perform the specified actions and process the blank into semi-finished finished parts through tool cutting.
Scope of application of Cnc Machining
So when and what kind of products will choose CNC machining?
Let's take a simple example: case panels (thickness is generally more than 5 mm thick). In this case, laser cutting will no longer be used for processing. The reason is as follows: when a workpiece with such a thickness is used to make a hole, a relatively obvious cross section will be left, and the internal grinding of this cross section is difficult to carry out. Therefore, it is more appropriate to directly use CNC processing for such products.
What other parts are suitable for CNC machining?
1. Special-shaped parts
That is, irregularly shaped parts, which usually have poor rigidity and require mixed processing of points, surfaces, lines, etc. It is very difficult to guarantee the deformation and accuracy of special-shaped parts, so it is difficult for ordinary machine tools to complete the processing. Cnc Processing is required.
2. Disk, sleeve, plate parts
There are distributed holes on the surface, keyways, radial holes and shaft parts with curved surfaces. Such parts cannot be processed by general machine tools. Curved parts need to be processed by CNC vertical machining centers, and parts with apertures need to be processed by CNC horizontal machining centers.
3. Box parts
This type of parts usually has a hole system, a cavity inside the part, and a certain ratio of length, width and height. Most of them are used in the fields of automobile, medical equipment and aircraft manufacturing. This type of parts has relatively high requirements for processing, and usually has to go through milling, drilling, expansion, boring, reaming, countersinking, tapping and other processes, almost all of which are done once. Ordinary machine tool processing takes a long time and cannot guarantee processing accuracy, so this type of parts are generally processed by CNC machining centers.
Box-type parts generally refer to parts with one or more hole systems, certain cavities or hollow spaces inside, and certain proportions in length, width, and height.
CNC tool control
How to use CNC machining? At this time, we can control the tool to make the product look very beautiful.
CNC machine tools by control method
Open-loop control has the lowest accuracy; semi-closed-loop control, the servo encoder is fed back to the CNC system, and the accuracy is higher; closed-loop control, the feedback signal is generally fed back from the grating ruler to the CNC system, and the accuracy is the highest
Relatively speaking, products with more complex processing and higher product requirements need to consider CNC processing. In addition, if the number of products is large, we will also choose a better process for processing, such as directly making a forming mold, or some other stamping and forging processes. However, relatively speaking, the appearance and final form of the products made by CNC are very beautiful.
Advantages of CNC
1. Greatly reduce the number of tooling, and no complex tooling is required to process parts with complex shapes. If you want to change the shape and size of a part, you only need to modify the part processing program, which is suitable for new product development and modification.
2. The processing quality is stable, the processing accuracy is high, the repeatability is high, and it can meet the processing requirements of aircraft.
3. The production efficiency is higher in the case of multi-variety and small batch production, which can reduce the time of production preparation, machine tool adjustment and process inspection, and the cutting time is reduced by using the optimal cutting amount.
4. It can process complex surfaces that are difficult to process with conventional methods, and can even process some parts that cannot be observed.