9 Common Problems Encountered with Precision CNC Engraved Parts

High-speed CNC engraving machining is widely used in the machining of precision CNC parts. In daily use, some problems will inevitably occur. Today, VMT CNC machining summarizes some of the problems that are easy to occur in the process of high-speed CNC engraving and machining. Let's take a look Which are there?

1. The rough machining effect is not good, how should the parameters be adjusted?

Assuming that the speed of the main axis is reasonable, the tool life cannot be guaranteed. When adjusting the parameters, the depth of the infeed should be adjusted first, then the speed of the infeed, and the amount of edge feed. However, the depth of adjustment is also limited. The depth is too small, and there are too many layers of this kind. Although the cutting efficiency is high in theory, the actual machining effect will still be affected by other factors. To become higher, generally speaking, the minimum depth of the knife cannot be less than 10mm;

2. Can CNC engraving be used for rough machining of steel materials?

To judge whether CNC engraving can process special materials, it mainly depends on the size of the tool used. The tool used in CNC engraving determines its maximum cutting capacity. If the mold shape allows the use of tools exceeding 6mm so far, it is strongly recommended to use CNC milling machine first. Machining, and then remove the remaining material by means of engraving CNC machining;

3. Is the CNC milling machine only capable of rough machining, and CNC fine carving machining only capable of finishing?

We need to know the concept of a technological process. The machining volume of roughing is relatively large, and the machining volume of finishing is usually relatively small. Therefore, some people habitually regard roughing as heavy cutting and finishing as light cutting, but in essence In the above, roughing, semi-finishing and finishing are process concepts, which represent different CNC machining stages. Therefore, the accurate answer to this question should be that CNC milling machine machining can do heavy cutting and light cutting, while CNC engraving can only do light cutting;

4. Is it possible to complete the engraving process by adding a speed-increasing head to the spindle of the CNC machining center?

Of course not. This kind of equipment has appeared at the exhibition a few years ago, but there is no way to complete the engraving process. The main reason is that the design of the CNC machining center considers its own tool range, and the overall structure is not suitable for engraving machining. The main reason for the wrong idea is that it mistakenly regards the high-speed electric spindle as the only feature of the engraving machine;

5. What are the main factors that affect the engraving process?

Precision CNC machining is a relatively complex process, and there are many factors that affect its CNC machining effect, mainly including the following points, namely the characteristics of the machine tool, the tools used, the control system, the CNC machining process, the material properties, the auxiliary fixtures and Surroundings;

6. CNC machining can use very small diameter tools, so can it replace EDM?

Of course not. Although the engraving process reduces the diameter range of the milling tool, small molds that could only be processed by EDM can now be realized by engraving. However, the ratio of the length to the diameter of the engraving tool is generally about five to one. When When using a small-diameter tool, only a very shallow cavity can be machined, and the EDM process basically has no cutting force, and the electrode can be produced intelligently, and the cavity can be machined by CNC;

7. What are the requirements of CNC engraving machining for the control system?

CNC engraving machining requires Xijiang first, so the control system must have the control ability of milling machining. For small tool machining, it must provide a feedforward function, the path speed is reduced in advance, and the frequency of small tool breakage is reduced. , it is necessary to increase the speed of the knife in the relatively smooth path section, thereby improving the efficiency of the engraving process;

8. Which materials are suitable for engraving CNC machining?

Non-metallic materials suitable for CNC engraving mainly include plexiglass, wood and branches, non-metallic materials not suitable for engraving mainly include glass and natural marble, and metal materials suitable for engraving mainly include copper, aluminum alloy and hardness less than HRC40 Mild steel, metal materials not suitable for engraving include hardened steel, etc.;

9. What properties of materials will affect CNC machining?

The main factors affecting the engraving performance of materials are the material category, hardness and toughness. The material category mainly includes metal materials and non-metallic materials. Overall, the greater the hardness, the worse the CNC machining performance. The worse the performance, the more impurities, the worse the machining type, the greater the strength of the micro-particles in the material, the worse the machining performance. The general standard is that the higher the carbon content, the worse the machining performance, the higher the alloy content, the better the machining performance. Poor, the higher the non-metallic element content, the better the machining performance;

10. What impact does the tool back have on CNC machining?

The tool factors that affect the engraving process mainly include the tool material, geometric parameters, grinding technology, etc. The tool material used in the engraving process is a cemented carbide material, which is a powder alloy, and the main performance index that determines the material properties is the powder. The average diameter, the smaller the diameter, the more wear-resistant the tool, the higher the durability of the tool, the sharpness of the tool is the main factor affecting the cutting force;

The above is an analysis of some problems often encountered in high-speed CNC engraving machining. I hope this article can help you.