1. What are the main differences between CNC engraving and CNC milling?
Both CNC engraving and CNC milling use the milling principle. The main difference is in the diameter of the tool used. The diameter of the commonly used tool for CNC milling is 6-40 mm, and the diameter of the tool for CNC engraving is 0.2-3 mm.
2. Is CNC milling only for roughing and CNC engraving only for finishing?
Before answering this question, we first understand the concept of the process. The machining volume in the roughing process is large and the machining volume in the finishing process is small, so some people habitually think of rough machining as "heavy cutting" and finishing machining as "light cutting". In fact, roughing, semi-finishing, and finishing are the concepts of the process, which represents different stages of processing. Therefore, the accurate answer to this question is that CNC milling can do heavy cutting or light cutting, while CNC engraving can only do light cutting.
3. Can CNC engraving process do rough machining of steel materials?
To judge whether CNC engraving can process a certain material, mainly depends on how big a tool can be used. The tool used for CNC engraving determines its maximum cutting capacity. If the mold shape allows the use of tools with a diameter of more than 6 mm, it is strongly recommended to first use CNC milling, and then use engraving to remove the remaining material.
4. Can the CNC machining center add a speed-increasing head to complete the engraving process?
Can not finish it. This kind of product appeared in the exhibition two years ago, but could not 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. The main reason for this wrong idea is that they mistakenly regarded the high-speed electric spindle as the only feature of the engraving machine.
5. CNC engraving can use a tool with a small diameter. Can it replace EDM?
It cannot be replaced. Although engraving has reduced the range of tool diameters for milling, small molds that used to be EDM can now be achieved with engraving. However, the length/diameter ratio of engraving tools is generally around 5:1. When using a small-diameter tool, only a shallow cavity can be processed, and the EDM process has almost no cutting force. As long as the electrode can be manufactured, the cavity can be processed.
6. What are the main factors that affect engraving?
Mechanical processing is a relatively complicated process, and there are many factors that affect it. The main points are the following: machine tool characteristics, tools, control systems, material characteristics, processing technology, auxiliary fixtures and surrounding environment.
7. What are the requirements of CNC engraving on the control system?
CNC engraving is firstly milling, so the control system must have milling control capabilities. For the machining of small tools, the feedforward function must be provided at the same time, the path speed is reduced in advance, and the frequency of broken tools is reduced. At the same time, it is necessary to increase the cutting speed in a relatively smooth path section, thereby improving the engraving efficiency.