Design/Evaluation of A Methodology For Performance Optimization Of Indexable Carbide Inserts

In this project, two broad facets in the design of a methodology for performance optimization of indexable carbide inserts were examined. They were physical destructive testing and software simulation.For the physical testing, statistical research techniques were used for the design of the methodology. A five step method which began with Problem definition, through System identification, Statistical model formation, Data collection and Statistical analyses and results was indepthly elaborated upon. Set-up and execution of an experiment with a compression machine together with roadblocks and possible solution to curb road blocks to quality data collection were examined. 2k factorial design was illustrated and recommended for process improvement. Instances of first-order and second-order response surface analyses were encountered. In the case of curvature, test for curvature significance with center point analysis was recommended. Process optimization with method of steepest ascent and central composite design or process robustness studies of response surface analyses were also recommended.For the simulation test, AdvantEdge program was identified as the most used software for tool development. Challenges to the efficient application of this software were identified and possible solutions proposed. In conclusion, software simulation and physical testing were recommended to meet the objective of the project.

Influence of surface texture on the galling characteristics of lean duplex and austenitic stainless steels

Two simulative test methods were used to study galling in sheet forming of two types of stainlesssteel sheet: austenitic (EN 1.4301) and lean duplex LDX 2101 (EN 1.4162) in different surface conditions. Thepin-on-disc test was used to analyse the galling resistance of different combinations of sheet materials and lubricants. The strip reduction test, a severe sheet forming tribology test was used to simulate the conditionsduring ironing. This investigation shows that the risk of galling is highly dependent on the surface texture of theduplex steel. Trials were also performed in an industrial tool used for high volume production of pumpcomponents, to compare forming of LDX 2101 and austenitic stainless steel with equal thickness. The forming forces, the geometry and the strains in the sheet material were compared for the same component.It was found that LDX steels can be formed to high strain levels in tools normally applied for forming ofaustenitic steels, but tool adaptations are needed to comply with the higher strength and springback of thematerial.

Methodology for identifying parameters for the TRNSYS model Type 210 -wood pellet stoves and boilers

This report describes a method how to perform measurements on boilers and stoves and how to identify parameters from the measurements for the boiler/stove-model TRNSYS Type 210. The model can be used for detailed annual system simulations using TRNSYS. Experience from measurements on three different pellet stoves and four boilers were used to develop this methodology. Recommendations for the set up of measurements are given and the re-quired combustion theory for the data evaluation and data preparation are given. The data evalua-tion showed that the uncertainties are quite large for the measured flue gas flow rate and for boilers and stoves with high fraction of energy going to the water jacket also the calculated heat rate to the room may have large uncertainties. A methodology for the parameter identification process and identified parameters for two different stoves and three boilers are given. Finally the identified models are compared with measured data showing that the model generally agreed well with meas-ured data during both stationary and dynamic conditions.

"Den dag vi slutar bli bättre, slutar vi vara bra" : Ledarskapets inverkan på medarbetares motivation till ständiga förbättringar

Syfte - Syftet med studien är att få en djupare insikt i sambandet mellan ledarskap och de faktorer som bidrar till ökat engagemang hos medarbetarna i arbetet med ständiga förbättringar. Studien riktar sig mot ett mellanstort industriföretag som implementerat lean production. Design/ metod - I vår undersökning valde vi att göra en kvalitativ fallstudie. Data samlades in i ett svenskt industriföretag. Totalt har 7 intervjuer genomförts. Undersökningsresultat - Resultatet vi kom fram till är att medarbetarna är i låg utsträckning delaktiga i förbättringsarbetet. Tidigare forskning visar att medarbetare som är delaktiga i beslut är också mer engagerade i arbetet. Metodkritik – Resultatet speglar enbart subjektiva bedömningar och de studerade variablerna bygger på respondenternas uppfattningar. Framtida forskning bör inkludera mer objektiva mått. Praktiska konsekvenser - Studien ger belägg till att medarbetarnas engagemang och motivation i förbättringsarbetet kan ökas genom att göra dem mer delaktiga. Forskning visar att medarbetare som får information och får delta i beslut känner större delaktighet i arbetet. Kunskapsbidrag - I den befintliga litteraturen hävdas det att ledarskapet är en viktig komponent för att öka medarbetarnas engagemang. Lite har dock skrivits om hur ledarskapet kan motivera medarbetarna till ständiga förbättringar i en organisation som arbetar i lean production. Nyckelord: