The large CNC machining center is developed from the basic CNC milling machine. It integrates all the features and functions of the CNC milling machine. The only difference between the CNC milling machine and the large CNC machining center is that the machining center has an automatic tool change device, which can realize the automatic tool change function during machining. The CNC milling machine has no automatic tool change device, which can not realize the automatic tool change function, which is the only difference between CNC milling machine and machining center.
Today, Xiaobian will introduce the automatic tool change device. Automatic tool change device of machining center: the automatic tool change device of machining center is composed of parts such as tool magazine, mechanical arm and driving mechanism. The tool magazine is used to store the tools needed for machining. There are many types of magazine, mainly according to the shape, there are many kinds of magazine, such as hat magazine, disc magazine and chain magazine. The capacity of these magazine is several to hundreds of knives. In the market, there are two kinds of tool magazine commonly used in machining centers, i.e. hat magazine and disc magazine, while chain magazine is not used by many manufacturers because of its high price.
Here is a brief introduction to the tool change method. The tool change method of large-scale CNC tool magazine is relatively simple. There is no mechanical arm in this kind of tool magazine, so it is not necessary to use the mechanical arm to complete the tool change. The tool change mode of the tool magazine is as follows: the tool magazine moves to the spindle to realize the tool change. This type has the advantages of high cost performance, convenient maintenance, simple structure and so on, but the disadvantage is that the tool change speed is slow. Tool change mode of disc type magazine: the tool change mode of disc type magazine is relatively complex, which is mainly completed by the manipulator, which takes out the tool from the magazine 180 ° and rotates it into the spindle to complete the tool change. This kind of tool magazine has the advantages of fast tool change, its disadvantages are complex structure, inconvenient maintenance, and high failure rate. Although there are different ways of tool changing, tool selecting and tool structure in large-scale computer gong processing disk type tool magazine, they are all controlled by numerical control system, and the selection and exchange of tools are realized by motor, air pressure or hydraulic pressure and manipulator.
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