And the first one’s off! The first large machine to be retrofitted this year is put into operation at the Ural Turbine Works

29 March 2021

Following a major retrofit, a KZh-1631FZM high-precision heavy-duty lathe was put into operation at the Ural Turbine Works. In total, ten different machines will be retrofitted, overhauled or serviced this year. Plans also include acquiring two new machines: a horizontal boring machine and a CNC mill.

The retrofitted KZh-1631FZM heavy-duty lathe performs a key operation – it machines the rotors of the steam turbines being manufactured, which is why special attention is paid to its technical condition. The lathe is a heavy machine, accommodating a workpiece as large as 1.6 meters in diameter, up to 8 meters in length, and up to 25 tons in weight.

As part of the upgrade, the lathe was equipped with a SIEMENS CNC system. The accuracy of the turbine-rotor machining is ensured using a newly-designed carriage with a sliding gate valve. With an installed spindle positioner and two types of angle drilling attachments, the functional capabilities of the lathe were expanded. In addition, the lathe’s hardware was overhauled and the bearings were completely replaced, thereby allowing its geometrical accuracy to be restored to nominal values. The lathe was retrofitted by JSC PC StankoPress, Kolomna.

A high/medium pressure (HMP) rotor for the PT-150 turbine that is being manufactured for the Krasnodarskaya CHPP, as commissioned by LUKOIL, has already been placed into the updated KZh-1631FZM lathe in order to be machined.

It’s worth noting that most of the work involved in retrofitting another horizontal boring machine, a Skoda W200, and a 1A670F1-type heavy-duty lathe will also be completed this year. Both machines are scheduled to be put into service in Q2 2022.

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