5 axes machining center
Li Song

Vertical machining center (3 axes) the most effective end face that machines a face to be workpiece only, workbench of circumgyrate of have the aid of of horizontal machining center, all sides that also can complete work only is machined. Current and high-grade machining center forward the way of 5 axle control develops, workpiece holds clip achievable pentahedral treatment. If deploy the system of high-grade numerical control of linkage of on 5 axes, still can undertake to complex dimensional curved surface high accuracy is machined.

Vertical 5 axes machining center

The rotor of this kind of machining center has two kinds of kind, one kind is workbench rotor. The setting can surround in the workbench on lathe bed X axis circumgyrate, the definition is A axis, general job limits comes A axis 30 degrees - 120 degrees. Of workbench among still set stage of a circumgyrate, in graphic representation surround locally Z axis circumgyrate, the definition is C axis, c axis is 360 degrees of circumgyrate. Pass the combination of A axis and C axis so, secure the work on workbench besides underside, 5 faces of the others can be undertaken machining by vertical main shaft. The least scale division value is A axis and C axis commonly 0.001 degrees, can become workpiece fractionize again so aleatoric angle, treatment gives inclined hole of bend cant, bend to wait. If A axis and C axis achieve linkage with XYZ3 linear axis, can machine a complex dimensional curved surface, of course the support of the numerical control system with this high-grade need, servo and software. The structure that this kind of good point that sets pattern is main shaft is simpler, main shaft tigidity is first-rate, production cost is lower. But general workbench cannot be designed too big, bearing lesser also, be more than when A axis circumgyrate especially when be equal to 90 degrees, the meeting when workpiece cutting is brought to workbench very big bear the weight of pitching moment.

Another kind is the circumgyrate that relies on head of vertical main shaft. Main shaft front is head of a circumgyrate, can surround by oneself Z axis 360 degrees, become C rod, still take on circumgyrate head can surround the A axis that X axis rotates, can amount to ± commonly 90 degrees of above, realize afore-mentioned same functions. This kind of good point that sets pattern is main shaft treatment is very quick, what workbench also can design is very big, the motor case with giant airframe, huge plane can be on this kind of machining center treatment. This kind of design still has one big advantage: When we are using spherical milling cutter to machine curved surface, when line of cutting tool center perpendicular at treatment face, it is as a result of the apical linear velocity of spherical milling cutter 0, the workpiece surface quality that acme cuts will be very poor, use design of main shaft revolving, your main shaft has turned relative to workpiece an angle, make spherical milling cutter keeps away from apical cutting, assure to have certain linear velocity, can raise the surface to machine quality. This kind of structure special the reception that gets treatment of curved surface of mould high accuracy, machining center accomplishs workbench circumgyrate type this hard. To achieve revolving high accuracy, high-grade rotor still configured feedback of round grating feet, graduation precision is in less than of a few seconds, of course the circumgyrate structure of this kind of main shaft is more complex, production cost is higher also.
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