Engraving and milling machines, engraving machines, and machining centers (computer gongs) are very similar in appearance and structure, and the following is a comparative analysis of the three:
Conception
Machining center: Hong Kong, Taiwan, Guangdong and other areas called computer gong, is a highly automated multi-functional CNC machine tool with tool magazine and automatic tool change device. The first machining center appeared in United States in 1958. It can realize the centralized processing of milling, drilling, boring, reaming and tapping and other processes after the workpiece is clamped at one time, and the function is particularly emphasized "milling".
Engraving machine: It has a high spindle speed suitable for the processing of small tools, the torque is relatively small, and it focuses on the "carving" function, such as wood (the wood carving machine is called a wood carving machine for the processing of wooden boards), two-color plates, acrylic plates and other boards with low hardness, which are not very suitable for large workpieces with strong cutting. Most of the products on the market under the banner of engraving machine are mainly for processing handicrafts, low cost, due to low precision, not suitable for mold development; However, there are exceptions, such as wafer engravers.
Engraving and milling machine: as the name suggests. It can be carved and milled, and the engraving machine increases the power of the spindle and servo motor on the basis of the engraving machine, and the bed bears the capacity, while maintaining the high speed of the spindle, and more importantly, the accuracy is very high. The engraving and milling machine is also developing to high speed, generally known as high-speed machine, with stronger cutting capacity and very high machining accuracy, and can also directly process materials with hardness above HRC60 and form them at one time.
Exterior volume
The volume of the machining center is large, the volume of the large 1690 machine is 4m*3m, and the small 850 machine is also 2.5m*2.5m; The engraving and milling machine is second, and the larger 750 machine is generally 2.2m*2m; The engraving machine is minimal.
Mechanical structure
The machining center generally adopts the cantilever type, the engraving and milling machine and the engraving machine generally use the gantry structure, and the gantry type is divided into beam type and fixed beam type, and the engraving and milling machine is mostly fixed beam type.
Metric data
Maximum spindle speed (r/min): machining center 8000; The most common engraving and milling machine is 24000, and the minimum is 30000 for high-speed machines; The engraving machine is generally the same as the engraving and milling machine, and the engraving machine used for high-gloss treatment can reach 80,000, but it is not a general electric spindle but an air-floating spindle.
Spindle power: the machining center is the largest, from a few kilowatts to tens of kilowatts; The engraving and milling machine is second, generally within 10 kilowatts; The engraving machine is minimal.
Cutting volume: the machining center is the largest, especially suitable for heavy cutting, roughing; The engraving and milling machine is second, which is suitable for finishing; The engraving machine is minimal.
Speed: Because the engraving and milling machine and engraving machine are relatively lightweight, their moving speed and feed speed are faster than that of the machining center, especially the high-speed machine equipped with a linear motor can move at a speed of up to 120m/min
Accuracy: The accuracy of the three is about the same.
In terms of processing size: the workbench area can reflect this better. The smallest workbench area (unit mm, the same below) of domestic machining center (computer gong) is 830*500 (850 machine);
The maximum workbench area of the engraving and milling machine is 700*620 (750 machines), and the smallest is 450*450 (400 machines);
The engraving machine generally does not exceed 450*450, and the common one is 45*270 (250 machine).
In terms of application objects: the machining center is used to complete the processing equipment of the workpiece with a large milling amount, a large mold, a material with high hardness, and is also suitable for the roughing of ordinary molds; The engraving and milling machine is used to complete the finishing of small milling quantities and small molds, and is suitable for the processing of copperwork, graphite, etc.; The low-end engraving machine is biased towards the processing of wood, two-color plates, acrylic sheets and other plates with low hardness, and the high-end ones are suitable for polishing and polishing wafers and metal shells.
It is generally believed
Machining centers, engraving and milling machines can not only make products, but also make molds, and engraving machines can only make products.
Tool magazine: machining center, there is a tool magazine is a machining center, no tool magazine is called computer gong or CNC milling; The engraving and milling machine is generally not equipped with a tool magazine, even if the tool magazine is selected, it is an umbrella tool magazine with 12 tools, or an in-line tool magazine with 6 tools; There is no knife magazine for engraving.
Supplemental information
There is no CNC engraving and milling machine in foreign countries, strictly speaking, engraving is a part of milling, so foreign countries only have the concept of machining center, and the concept of small machining center is derived from this to replace the engraving and milling machine. Buying an engraving machine or buying a CNC milling machining center is a question that needs to be considered by yourself, and it depends on the actual production needs. In addition, there is a popular high-speed cutting machine (HSCMACHINE), which is called a high-speed machine in China.
Let's first figure out the differences between the three models:
1. CNC milling and machining center are used to complete the processing equipment of workpieces with a large amount of milling
2. CNC engraving and milling machine is used to complete a small amount of milling, or soft metal processing equipment
3. High-speed cutting machine tools are used to complete medium milling and minimize the grinding amount after milling
An in-depth analysis of the structure of the above equipment can help us make the right choice