| Popis: |
This paper presents the results of a study of the accuracy andstability of manufacturing blanks for sections of the turbine nozzle apparatus, bythe method of selective laser melting, based on quality control charts. Billets forthe turbine nozzle section were made from Inconel 738 material by selective lasermelting on an SLM 280HL unit. The control of the geometric characteristics of thesections of the turbine nozzle apparatus on a coordinate measuring machine wascarried out. The procedure of statistical analysis of the technological process wascarried out using control charts for quantitative data and an assessment of thecapabilities of the process, and its suitability to meet the specified requirements.As a characteristic of the quality of the product, an indicator was chosen - theaccuracy of the geometry of the profile of the feather blades of the section of thenozzle apparatus, which significantly affects the operational characteristics of theproduct. As a result of the statistical analysis, it was found that the process is in a state of statistical controllability with respect to internal variability, the processis suitable for meeting the specified requirements and has a sufficient margin ofcapabilities necessary for effective process control. |
