MACHINING PROCESS AND TOOL PATH PLANNING OF AIRFOIL STEAM TURBINE BLADE ON 5-AXIS MACHINE DMU-50

• Main Author: YUDHISTIRA (NIM: 23115007), BAYUAZIE
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26037
• Institution: Institut Teknologi Bandung

Electricity Providers Companies in Indonesia have a Workshop with the task of providing components related to power generation. The sustainability of energy conversion in power generation sector through steam turbine is highly reliable, so the availability of spare parts must be maintained. One of important component is the steam turbine blade. The function of steam turbine blade is to move the turbine shaft due to the vapor pressure that drives the turbine blades. Steam turbine blade is separated with steam turbine shaft. Turbine blades have two important parts, the airfoil part and the root of the turbine blade. These components become important parts because the maintenance must be done periodically to keep production rates up. The steam turbine blades spare parts are made overseas. This research is done so the company can produce its own components. <br /> <br /> The process planning is carried out by analyzing the steam turbine steam airfoil needs. The 5-axis DMU-50 engine is used to achieve the desired profile and the same datum reference for the whole process of turbine blade airfoil machining. After the engine was determined, the next steps are defining the standard parts to build the fixture which is needed for the clamping, determining the cutting tool and machining parameters that are required by the whole machining process and making of the cutting tool path that is preceded by creating the system coordinate and material stock with G-Code form as software output for machining process. Simulations can be performed on software that provides result information of deviation between machining process and target model. The software can also provide the surface roughness information due to the ball nose cutting tool use. The conclusion from the deviation result between the machining process with the target is -0.15mm to 0.006mm.