Double-spindle vertical lathe with CNC – is a lathe with the spindles and parts attached to them that are positioned vertically above the fixed instrument and move along the main axes. Basically it is two lathes in one operating zone. Lathe control system ensures independent rotation around the C1 and C2 axes and travel along the X1, X2 and Z1, Z2 of the two spindles. This allows induction of the advanced cutting operation and fully utilize potential of the cutting instrument by the world leading manufacturers (SANDVIK, KENNAMETAL) with simultaneous crushing of the cutting waste and also allows to adjust both spindles independently.

Lathe model PAB-350 contains components made by the leading world manufacturers: control system SIMENS SINUMERIK 840DI, digital actuator SIMOVERT è SIMODRIVE 611UÅ, electrical equipment SCHNEIDER, pneumatics CARMOZZI FESTO, slideway bearings BOSCH REXCROTH.

Optimal construction of the stand and spindle heads eliminates interference between the spindles and allows to carry out rough finish at the first spindle and final finishing - at the other one.

Mechanism for part turning (turner) makes it possible to carry our full processing of the one side of the part at one spindle and then transfer the part to the other spindle with simultaneous turning of the part and fully process the part on the other side.

Due to the centering control system tilting device ensures full elimination of the axle and radial motion variation in the fixture after the flip, which guarantees minimal motion variation of the one face plane relative to the other.

Range of application can be significantly broadened by utilization of the power tools (possibly rotating power tools) including installation of the one or more capstan heads. In this case a complex processing of the parts containing apertures outside of the rotation axis and parts with various milled surfaces is possible.

Two instrument blocks (one for each slide rail) are installed on the stand in a way that ensures processing of the parts that are fixed in the holding fixtures of the spindles.

STRUCTURAL FEATURES

Cast base is box-like with cross and lateral walls, which form functional modules. The stand is mounted on the upper base surface and the cross-arm is rigidly attached to the stand. A cutting waste conveyer for cutting waste from both operating spaces is installed in the base opening. Pockets serve as reservoirs for refrigerating liquid.

Cross-arm – rigid cast construction. Longitudinal slides of the slide rests with the spindle heads and instrument blocks are mounted on the cross-arm.

Slide rest consist of cross and lateral skids that move along the slideway bearing. Spindle head with main motion drive is installed on the slide rest.

First slide rest has access into the zone of the input pan for raw part loading. In the middle of the cross slide’s run the parts are processed with the cutting rim that is installed in the instrument block. At the end of the cross slide’s run enters a transfer zone for transfer of the part into the transfer mechanism.

Second support has entry accesses into the transfer mechanism zone for loading of the part after processing at the first spindle. In the middle of the cross slide’s run the parts are processed with the cutting rim that is installed in the instrument block. At the end of the cross slide’s run enters an output track zone for removal of the processed part form the operation zone.

Spindle’s drive is carried out by the frequency-regulated induction motor through the gearing system.

The front bearing of the spindle is a triplex of the angular-contact ball bearings; the back bearing is a duplex of the same kind of ball bearings. During assembly ball bearings’ pockets are filled with enough lubricant to alst the entire service life of the angular ball bearings. Spindle bearing parts do not require additional adjustment during exploitation process.

Transfer of the half-finished product after its processing at the first spindle to the second spindle with (or without) simultaneous flips is carried out by the special transfer mechanism.

Locking of the instrument onto the lathe’s base is carried out using a contact sensor. Contact sensor seats are rigidly attached onto the left and right spindle heads in order to install the contact sensor. TT 130 probe produced by "ÍÅIDENHAIN" is used as a sensitive element. Because the probe is exchangeable it can be used for adjustment of several other lathes
 

EASY MAITANANCE

Vertical assembly guarantees direct accesses to the work-piece range. Movement of the spindle along the X axis ensures constant distance from the operator to the main spindle.

APPLICATION DOMAIN

The lathe is intended for high-precision and high-reliability processing for small-, medium-, high-volume and gross manufacturing of such parts as rings, flanges from piece blanks, etc.