【文章內(nèi)容簡(jiǎn)介】 s. Automatically change device to the function of machine, processing efficiency greatly. Because ordinary nc vertical milling machine is the medium and small parts of the general, its most needs a few knife processing (10), and, within the tool is increase automatically change tool device and while automatically transform spindle speed. Can reduce labor intensity, reduce cutter replacement time machine, it raised the automation degree, and also to improve the labor productivity. Therefore, nc vertical milling machine as the largest number of CNC milling machine, application scope and most extensive a, on the added can quickly and accurately change the sword automatically change tool device is very X necessary. All kinds of numericallycontrolled machine tool39。s automatically change the structure of machine tool device depends on the type, machining scope and cutlery type and quantity, etc. This device can be divided into the following several main form: 1) rotary cutter cutter replacement form Nc lathe use rotary cutter is a simple automatically change tool device. According to the different processing object, can be designed to sifang and hex cutter or other various forms. Rotary cutter separately on the four, six or installed by the tool, and more nc device instructions transposition change knife. Rotary cutter on the structure must have good strength and rigidity, and reasonable positioning structure, to ensure that the rotary cutter in every inversion is the highest possible after repositioning precision. Such as: CK7815 numerical controlled lathe adopts BA200L cutter, its working cycle is: the throats of nc device receives a loosen a turned to mand the position of instruction requirement a clamping gave the inversion exit signal. 2) change main shaft head cutter replacement form With rotary tool in the nc machine tools, replace main shaft head for the knife is a simple change dao style. Main shaft head tong have horizontal and vertical two kinds, and mon turret of inversion to replace main shaft head to realize automatic changing swords. Each spindle head with each process in advance of rotary tool needed to change cutters, when receive instruction, the main shaft head and, in turn, turn to processing position and connected to the main movement driven corresponding rotation, and tool spindle is not in other position of spindle are processed with the main sports withdraw. Turret spindle head way of changing tools saves the main advantage is automatic loose clip, unloading dao fittings knife, clamping and tool handling a series of plicated to operate, thereby significantly reducing the cutter replacement time, improve the reliability of the cutter replacement, but due to structural causes and space position of spindle ponent of the restrictions, the number of poor and spindle rigidity may not many. Therefore turret spindle head change knife usually only applies to process less, precision less demanding nc machine tools, such as CNC milling machine. 3) take knife library automatically change knife form Knife library automatically change by knife knife forms are device ponent library and tool exchange. At present this change in the nc machine knife method of the most widely used. Knife library of nc tool device automatically change spindle box and turret spindle head, because in the headstock pared only a spindle, so the spindle ponent has enough so that they can meet various stiffness of the precision machining requirements. In addition, the knife library can deposit quantity of knives, can undertake more plex ponents, which could evidently improve process of CNC adaptability and processing efficiency. This knife library automatically change tool device especially suitable for CNC milling machine, CNC drilling and CNC boring. XI The type of tool store by knife library structure forms can be divided into: disetype knife library, chain knife library, box type knife library box and linear。 Press set at different tool store can be divided into: top buy type, side buy type, suspension and console, etc. Various types。 According to exchange tool or exchange spindle, knife library can be divided into: standard knife library (abbreviation knife library) and spindle box knife library. Although knife library have various forms, but the nc machine monly used mainly disetype and chain two kinds. Switching device, the manipulator form is also present in various nc machine is the most used rotary arms manipulator. Other forms and swing), which include single arm double claw manipulator single gripper rotary manipulator, double manipulator, etc. cutter replacement manipulator principle of work Below is XKA5032A/C in the numerical control vertical lift milling machine tool device automatically change in this changing tools by the working principle of manipulator. This manipulator installed on the left flank, along with spindle together spindle box sport. Manipulator mechanical arm and 45 176。 from the inclined shell position. The mechanical arm 1 shape symmetrical. Fixed in to rotate to rotate four, 45 176。 Angle with spindle into, installed in the shell 3, 5 for the arm, but by hydraulic cylinder torre (figure is not driven mark), has flexible manipulator, slewing, catch knife, loose the knife such action. Telescopic action: the hydraulic cylinder (shown in not marked) drive along the spindle arm brackets 5 axial movement. Rotary act