Engraving and milling machine is a kind of CNC machine tool. Engraving and milling machines are generally considered to be CNC milling machines that use small tools, high power, and high-speed spindle motors. There is no concept of an engraving and milling machine abroad, and the machining mold is mainly milled by a machining center (computer gong). However, the machining center has its shortcomings, especially when processing small molds with small tools, it seems to be difficult, and the cost is very high.
At the beginning of the country, only the concept of CNC engraving machine was used. The advantage of engraving machine in engraving, such as the hardness of the processed material, will also be weak. The appearance of the engraving and milling machine fills the gap between the two. The engraving and milling machine can be engraved and milled. It is an efficient and precise CNC machine tool.
1. Concept
CNC engraving and milling machine is a machine that can engrave and mill. It increases the power of the main shaft and servo motor on the basis of the engraving machine, increases the bearing capacity of the bed, and can maintain the high-speed operation of the main shaft and high processing accuracy. The engraving and milling machine can also be developed to a high speed and transformed into a high speed machine. The cutting ability of the high-speed machine is stronger, and the processing accuracy is higher. It can directly process materials with hardness above HRC60 and form them at one time.
In Hong Kong, Taiwan and Guangdong, the machining center is called a computer gong. It is a highly automated multi-function CNC machine tool with a tool magazine and automatic tool changer. It can realize one-time clamping of workpieces, and can perform various processes such as milling, drilling, boring, reaming and tapping after clamping. Among these functions, special emphasis is placed on the "milling" function.
2. Application target
Machining center is suitable for workpieces with large milling volume and large molds, and it is also suitable for roughing of common molds.
Engraving and milling machine is mainly used to complete the workpiece with small milling volume, such as the finishing of small molds. It is suitable for processing copper, graphite and other materials.
1. Processing range
Machining centers and engraving and milling machines can process non-metals and metals, and even high-hardness molds.
Second, appearance volume
The machining center has the largest volume. The size of the large 1690 model is 4m * 3m, and the small 850 model is also 2.5m * 2.5m. The engraving and milling machine is smaller than the machining center. The larger 750 machine is generally 2.2m * 2m.
3. Mechanical structure
The machining center generally adopts the cantilever type, and the engraving and milling machine generally uses the gantry type structure. Gantry type is divided into truss beam type and fixed beam type. At present, the engraving and milling machine is mostly fixed beam type.
Fourth, index data
Maximum spindle speed (r / min): machining center 8000; engraving and milling machine is most common 30,000.
Spindle power: The machining center is generally from several kilowatts to tens of kilowatts, and the engraving and milling machine is generally within ten kilowatts.
Cutting amount: the machining center has a large cutting amount, especially suitable for heavy cutting and roughing; the cutting amount of the engraving and milling machine is small, suitable for finishing.
Speed: The moving speed and feed speed of the engraving and milling machine are faster than the machining center, especially the high-speed machine equipped with linear motor can move up to 120m / min.
