Gantry type machining centers from TOS KUŘIM - OS, a.s. company used in railway industry

Bogie frame casting machining in Czech company ČKD Kutná Hora, a.s.

Gantry type machining centre FRFQ 300 – VR/A16 with divided working area and technology for machining of cast steel of bogie frames was delivered to the ČKD Kutná Hora a.s. company in 2007. Automatically interchangeable heads which were a part of this supply (straight head VA1 - Mk 2 000 Nm, VA2 - Mk 1 000 Nm and angle head VP2 - Mk 1 000 Nm) make the machine suitable for machining of very sophisticated steel castings with a high content of sand and inclusions.
Having managed the technology of casting, ČKD Kutná Hora, a.s. is one of the three foundries in the world capable of casting similar pieces. The philosophy of the company ČKD Kutná Hora was not just deliver unmachined casts to the US market but become a supplier of complete bogie frames.
At the beginning of process of technology debugging in TOS KUŘIM – OS the machining time of 160 hours for one piece was achieved. By gradual optimization of the quality of delivered castings and cutting conditions, the final time of 27 hours was achieved for one piece (out of which 6 hours were a reserve for the quality of delivered castings).

Machining of tram unit undercarriages in ŠKODA TRANSPORTATION a.s., Plzeň

In 2009, the FRFQ 300 – VR/A8 gantry type machining centre was put into operation in ŠKODA TRANSPORTATION a.s., Plzeň, with the power output at the spindle of 37 kW, including a debugged technology for machining of tram unit undercarriages. Until this time, ŠKODA TRANSPORTATION machined these undercarriages using the current technologies on less productive machines and also had to use outsourcing, which was often very problematic with respect to the required quality and delivery deadlines. In addition to the VO automatically interchangeable universal head (Mk 1 200 Nm), the supply of the gantry-type machining center included a special VP13 automatic interchangeable head of angular design which enables the machining of inaccessible locations without the need of re-clamping and subsequent realigning of a workpiece. Compared to the original technology, TOS Kuřim solution has increased the efficiency of machining by approx. 40%, compared to the existing technological procedure. For machining of undercarriage on the FRFQ 300 – VR/A8 machine was used a quite different approach for solving the problem of the sequence of technological operations that had been used on the existing machines so far. By using the productive VO head quite sizable savings were achieved. This head enables machining in horizontal, vertical and angular position of the spindle; the head dimensions allowed for machining of majority of surfaces on the undercarriage using full stroke in all machine axes. When machining with the VO head, the following operations were used: plane milling, profile milling, drilling, accurate drilling and counter boring.

Delivery of gantry type machining centre to Bombardier Transportation Czech Republic a.s., Česká Lípa

Based on a competitive tendering, even in this case TOS KUŘIM – OS, a.s. became supplier of the FRFQ 300 – VR/A10 gantry type machining centre with power output of 30 kW and divided working area, which has substituted the need for outsourcing of the component machining. This centre also enabled the launch of the production of new types of wagon undercarriages. Delivery of the gantry type machining centre with automatically interchangeable heads for 5-axes machining (type VK - Mk 1 000 Nm and a special angular head type VP 10) took place in November 2010. The divided working area enables to minimize machine downtime as a result of aligning of further work pieces, and/or cleaning and measuring.
TOS KUŘIM - OS, a.s. is the manufacturer of not only gantry type machine tools featuring the power output of 30 and/or 37 kW, but it also manufactures gantry type machines giving power output at the spindle of 60, 71 and 100 kW. A part of the production of gantry type machines also include FRU or FRP types, i.e. gantry type machines with a fixed table and movable portal or gantry type machines with a fixed portal and travelling table. These alternatives enable to machine components up to the clearance between the columns of 7,100 mm and the clearance between the table and cross-rail of 4,200 mm. Another part from the TOS KUŘIM - OS, a.s. portfolio are the floor type machining centers (type FU and FUB), giving power output at the spindle of 30, 37, 60 kW. For more information on the entire production program of TOS KUŘIM - OS, a.s. click on www.tos-kurim.cz.

Exhibitor Data Sheet