What do we need to know about CNC machining operations?

In the CNC processing industry, will we encounter some operating technical problems that are not professional enough? It doesn’t matter. Dongguan I will give you some experience through Ruibang Technology, CNC processing factory , for reference only!

1. The white steel knife should not rotate too fast;

2. Use white steel knives to open thick copper knives less, and use flying knives or alloy knives more often;

3. When the workpiece is too high, it should be divided into layers with different lengths of cutters to open thicker;

4. After using a large knife to open the thicker, use a small knife to remove the remaining material to ensure that the remaining amount is consistent before the knife is light;

5. Use flat bottom knife processing on the plane and use less ball knife processing to reduce processing time;

6. When the copper worker clears the angle, first check the R size on the angle, and then determine how big the ball knife is used;

7. The four corners of the calculating table plane should be flat;

8. Whenever the slope is an integer, use an inclination knife to process it, such as the pipe position;

9. Before doing each process, think clearly about the remaining amount after processing in the previous process to avoid empty knife or excessive processing of the knife;

10. Try to take simple knife paths, such as shape, trench, single-sided, and less surround heights;

11. When you can go to WCUT, don’t go to ROUGH if you can go to FINISH;

12. When the appearance of the light knife, first coarse light, then fine. When the workpiece is too high, first glide the edges and then the bottom;

13. Set tolerances reasonably to balance processing accuracy and computer calculation time. When the thickness is opened, the tolerance is set to 1/5 of the margin, and when the light tool is opened, the tolerance is set to 0.01;

14. Do more processes to reduce empty knife time. Think more and reduce the chances of making mistakes. Make more auxiliary lines and auxiliary surfaces to improve processing conditions;

15. Establish a sense of responsibility, carefully check each parameter, and avoid rework;

16. Be diligent in learning, be good at thinking, and keep making progress. When milling non-planar, use more ball knives and less end knives, don’t be afraid of connecting the knives; clear the corners of the knife and repair the big knives; don’t be afraid of repairing the faces. Appropriate repair of the faces can increase the processing speed and beautify the processing effect;

17. High hardness of blank material: better reverse milling

Low hardness of blank material: better milling

Machine tool has good accuracy, good rigidity, and finishing: it is more suitable for straight milling, and vice versa.

It is highly recommended to use straight milling at the corners of the parts.

Rough processing: better reverse milling; fine processing: better straight milling

The tool material has good toughness and low hardness: it is more suitable for rough processing (large cutting processing)

The tool material has poor toughness and high hardness: it is more suitable for finishing (small cutting processing).

18. Problem of thickening front mold:

First, rotate the copper male picture 180o in the front view or edge view to become the front mold picture. Of course, you also need to add a pillow position and PL surface; where the original body needs to leave the front mold, do not use the mirror body to turn the copper. When the working drawing becomes the front molding drawing, it sometimes becomes wrong (when the copper common drawing is asymmetrical in the X direction and Y direction).

There are two difficulties in processing front molds: the material is relatively hard; the front molds should not be welded easily, and they must not be wrong.

The principle of using a knife when the front mold is thick is similar to that of a copper worker. The large knife is thick → the small knife is thick → the large knife is bright → the small knife is bright → the small knife is bright → the small knife is bright , but the front mold should try to use a large knife, and not a knife that is too small, as it is easy to flash the knife, and the thick shaping is usually first. Use a knife to make the thicker () and try to use a round nose knife when the knife is light. Because this knife is big enough, powerful, and has a front mold processing with a parting surface, you usually encounter a problem. When the knife is light, the parting surface is touched due to the impact. The machine must be accurate, and the cavity must have a processing allowance of 0.2~0.5 (leave it to spark). This is to correct the surface of the mold cavity to 0.2~0.5 in the forward direction, and set the machining allowance to 0 when writing the tool path.

When opening a thick or light knife in the front mold, the tooling range should be defined. Remember that the range you set is the range of the tool center, not the range of the tool boundary, not the range of the tool processing, but a larger tool radius.

The commonly used method of cutting the cutting path for thick front mold is to dig the curved groove and parallel light knife. During the front mold processing, the pillow surface and the pillow surface should generally be processed to a correct number, and the 0.1 margin can be left to be used for molding.