STACK UP TOLERANCE CALCULATION FOR STIRLING ENGINE- BETA 200 WATT

• Main Author: Aji Muhammad, Kurniawan
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41808
• Institution: Institut Teknologi Bandung

As technology increases and performance requirements continually tighten, the cost and required precision of assemblies increase as well. There exists a strong need for increased attention to tolerance analysis to enable high-precision assemblies to be manufactured at lower cost. A wellknown method for give an assurance for mechanism to be well operated is called tolerance analysis. After calculating how much tolerance will be assigned to the assembly, designer have to assign tolerance which are divided into dimensional and geometric tolerance with reference to ASME Y14.5 Institut Teknologi Bandung and Teikyo University made a join research program under Stirling Engine Cogeneration Technology (SECOTEC) Association to design Stirling Engine for rural area in Indonesia. Institut Teknologi Bandung have received one beta type Stirling engine prototype that could generate 200-Watt electricity. However, as a complex mechanical assembly, Stirling Engine drawing specification needs to be redesign as the manufacturer’s capability would be different. Consequently, Institut Teknologi Bandung needs to design new Stirling engine dimensional and geometrical specification (GD&T) in accordance to ISO standard and Indonesia’s manufacturers capability. New Stirling Engine drawing already been established as a result of stack up tolerance in the assembly. Stack up tolerance calculation has been conducted in two-dimensional analysis seeing that Stirling Engine has no three-dimensional working mechanism. Two-dimensional stack up tolerance calculation along with Direct Linearization Method as mathematical modelling tools have been used to calculate three criteria, called Key Characteristics, that Stirling Engine needs to maintain for delivering optimum performance.