RAFAMET Underfloor Wheel Lathe

The underfloor lathe UGE 150 N is a CNC double-saddle special-purpose lathe, designed for reprofilling of wheels, which are used in rail vehicles. Its main application is reconditioning of wheel profiles of heavy rail vehicles without dismantling of wheel sets from the vehicles. It enables to shorten radically the shutdown time of vehicles and thereby increases efficiency of their exploitation.

Usage of additional special equipment makes possible reconditioning of frictional surfaces of brake discs.

The machine is installed on a pit-type foundation, below traffic rails, which ensures its operation in a roll-through system. Shunting of vehicles on the rails above the machine tool is possible when the lathe is switched off.

The basic body system of the machine tool consists of two columns made from cast iron and seated on a common cast iron plate - a bed. A cross-rail, on which saddles are mounted, is fixed to the columns. Such a structure guarantees high geometrical stability of the machine tool and provides better vibration dumping compared with welded structures.

Depending on execution of the machine tool, a wheel set can be clamped by rotary centres or holding down pads, which are installed in quills of holding down devices. Two driving rollers drive each wheel of the machined wheel set. Each roller has an individual drive unit and lifting mechanism with flexible pressure against the wheels of the wheel set.

Thanks to application of a modern CNC system and equipment for automatic measurement of the machined wheel sets, machining is economical, efficient and accurate. Universal equipment and wide range of programming possibilities guarantee easy switching to atypical profiles of wheel sets without necessity of introducing changes in the equipment of the machine.

The machine tool is controlled through a CNC system. The main control panel of the machine includes also a CNC panel, which is mounted on the extension arm under the rails of the machine tool. It can be set in any position, which is convenient for operators. On the machine tool, there are also installed auxiliary control panels, used for operating of wheel set clamping devices.

The machine tool can be operated by one operator only. Successive stages of the technological process are related to adequate text-graphics images, which are displayed on the screen of the control desk. The control system is also equipped with a diagnostics of the lathe’s operating condition. It informs about occurring disturbances in functioning of the machine tool and procedures of their elimination.

The machine tool can be additionally provide among others with equipment for facing of brake discs, system of shunting and positioning of a vehicle (a shunter with its own drive, rope system), chip crusher, dust and fume extraction system, lifting device for machining of mechanically coupled wheel sets, etc.

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