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Design of a milling fixture for four-axis CNC trimming of composite parts
Hibš, Dominik ; Slaný, Martin (referee) ; Zouhar, Jan (advisor)
This thesis deals with the design of a milling fixture for trimming of folding propellers for the company Mejzlik Propellers s.r.o. Firstly, an adequate HAAS DM-2 machine and UniCut Dron milling tool were selected. The cutting force was then quantified at 9.2 N. Once the cutting force was established, the clamping surface could be designed and the clamping force set at 317.3 N. After considering several fixture options, the final design was selected. The selected design was used to program the CNC machine in Fusion 360. A technical and economic evaluation followed, when the total price of the product was 41,671 CZK and the cost of machine cutting one propeller was 32.60 CZK, while the cost of manual trimming was 29.10 CZK
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Design of a group milling fixture for clamping components
Kalous, Jan ; Dvořák, Jaromír (referee) ; Zemčík, Oskar (advisor)
The thesis deals with the design of a group milling jig for four different shaped components. These parts are components of a baking line and are designed to clamp baking matrices for wafer production. The semi-product for all the parts is a casting made of EN-GJS-400-15, cast iron with spheroidal graphite. Machining on a horizontal milling centre MS NH5000 DCG from DMG Mori Czech s.r.o. was chosen to produce all four parts. A list of tools and gauges was made. Subsequently, a technological process was created for the selected part with the designation HAAC-62836-001. Then the cutting forces from the individual cutter inserts, clamping, and friction forces were calculated to verify that the machined piece could move in the jigs. This thesis includes calculations of both jigs and evaluation according to the technical aspect.
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Design of production technology for a distribution block
Večeřa, Jiří ; Píška, Miroslav (referee) ; Sliwková, Petra (advisor)
The master's thesis focuses on the design of manufacturing technology for a selected component made of ductile iron EN-GJS-400-15. The theoretical part of the thesis discusses the technologies used in component manufacturing, such as turning, milling, drilling, surface grinding, honing, thermal energy debburing and phosphating. The subsequent sections specify the specific production machines and cutting tools utilized in the component manufacturing process. In the practical part, a technological procedure is proposed, describing the sequence of manufacturing operations required for producing the component. It also includes inspection operations for measuring tolerances. Additionally, manufacturing instructions are provided, offering a detailed description of individual manufacturing operations and specifying the frequency of tolerance checks. The thesis concludes with a technical-economic evaluation, summarizing the material costs for production preparation, the costs for ensuring the production itself, and evaluating the manufacturing technology.
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Application of GibbsCAM software for machining
Gerbel, Jakub ; Kalivoda, Milan (referee) ; Polzer, Aleš (advisor)
The main subject of this thesis is the application of GibbsCAM software in machining. In this thesis, a system analysis of the problem solved is carried out, especially concerning CAD/CAM systems, machining of deep pocket corners and the distribution of touch probes. From a practical point of view, the work is realized with the company JHV - GROUP s.r.o. The goal of the work is to design the actual component and create a 3D model in the CAD system CREO Parametric. Programming of its production with application of in-process measurement was performed in GibbsCAM software. The proposed procedure is verified in Vericut software. Subsequently, the production of the part is realized on a selected CNC machine tool and then the measurement on a 3D coordinate measuring machine. The application of in-process measurement on the selected CNC machine with a FANUC control system, is realized by Renishaw Inspection Plus measurement cycles. The obtained results are evaluated and discussed in the final chapter. From the results drawn, recommendations and suggestions for the industrial enterprise are made.
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Production technology for an ignition stator body of the Jawa Pionýr motorcycle
Zeman, Petr ; Dvořák, Jaromír (referee) ; Sliwková, Petra (advisor)
The Jawa 50 motorcycles, produced in several models between 1958 and 1982, were equipped with several types of ignitions. From the current point of view, they are not satisfactory. The bachelor´s thesis describes the original designs, the commercial and amateur modifications of the ignition and its advantages and disadvantages, and deals with the innovative design and variants of mounting by individual coils. The work further deals with production of the ignition body by choosing a semi-finished product, machines and tools and compilation of a technological procedure and drawing documentation.
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Production technology design for an engine head of the tractor UR2 and UR4
Kurjak, Dávid ; Osička, Karel (referee) ; Zemčík, Oskar (advisor)
The bachelor's thesis deals with the design of a new technology for machining UR–II and UR–IV cylinder heads, which are cast from grey cast iron. This is a transition from single – purpose centres to universal machining centres. At the beginning of the work, there is information about the given component, information about the used material and a brief description of the original technology. This is followed by the design of a new technological procedure, the choice of tools and gauges, fixtures for clamping and the selection of suitable machines for processing. The work also includes a technical – economic evaluation of new and original technology.
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The use of milling and co-milling procedures for preparation of interactive mixtures
Jezerská, Jana ; Šklubalová, Zdeňka (advisor) ; Kvítek, Libor (referee) ; Vitková, Zuzana (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of: Pharmaceutical Technology Candidate: Mgr. Jana Jezerská Supervisor: doc. PharmDr. Zdeňka Šklubalová, Ph.D. Consultant: Ing. Jakub Koktan, Ph.D. Title of Doctoral Thesis: Utilization of technological procedures of milling and co-milling in the preparation of interactive mixtures The dissertation thesis is an annotated summary of the publication and research activities of the author, Mgr. Jana Jezerská (maiden name Brokešová). The thesis is focused on the preparation of binary interactive powder mixtures which consist of the micronized drug particles adhered onto the larger particles of an excipient (a carrier). The binary powder mixtures were prepared by mixing and/or co-milling and characterized by granulometric methods; crystallinity (thermal analysis, X-ray powder diffractometry), the flow properties (shear cell, avalanche properties) and the surface energy were evaluated as well. The dissolution rate of model drugs was estimated using a flow-through powder dissolution cell (USP-4). The used statistical model (central composite design) enabled to establish optimal milling conditions in a ball mill (the milling speed, the milling time, the size of milling balls) for five powder carriers. Based on quadratic response surface,...
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The use of milling and co-milling procedures for preparation of interactive mixtures
Jezerská, Jana ; Šklubalová, Zdeňka (advisor) ; Kvítek, Libor (referee) ; Vitková, Zuzana (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of: Pharmaceutical Technology Candidate: Mgr. Jana Jezerská Supervisor: doc. PharmDr. Zdeňka Šklubalová, Ph.D. Consultant: Ing. Jakub Koktan, Ph.D. Title of Doctoral Thesis: Utilization of technological procedures of milling and co-milling in the preparation of interactive mixtures The dissertation thesis is an annotated summary of the publication and research activities of the author, Mgr. Jana Jezerská (maiden name Brokešová). The thesis is focused on the preparation of binary interactive powder mixtures which consist of the micronized drug particles adhered onto the larger particles of an excipient (a carrier). The binary powder mixtures were prepared by mixing and/or co-milling and characterized by granulometric methods; crystallinity (thermal analysis, X-ray powder diffractometry), the flow properties (shear cell, avalanche properties) and the surface energy were evaluated as well. The dissolution rate of model drugs was estimated using a flow-through powder dissolution cell (USP-4). The used statistical model (central composite design) enabled to establish optimal milling conditions in a ball mill (the milling speed, the milling time, the size of milling balls) for five powder carriers. Based on quadratic response surface,...
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Study of influence of hydrophilic carriers on the solubility of a poorly soluble drug
Veselá, Eliška ; Šklubalová, Zdeňka (advisor) ; Vraníková, Barbora (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of: Department of Pharmaceutical Technology Supervisor: Doc. PharmDr. Zdeňka Šklubalová, Ph.D. Consultant: Mgr. Jana Brokešová Student: Eliška Veselá Title of Thesis: Study of influence of hydrophilic carriers on the solubility of a poorly soluble drug The aim of this thesis was to enhance the solubility of a poorly soluble model drug meloxicam (MLX) by preparing binary interactive mixtures with hydrophilic carriers by simple mixing and co-milling. The mixtures were characterized for granulometric properties. The dissolution studies were carried out using the USP-4 apparatus assembled with a flow-through powder cell in an open-loop system. The dissolution rate rrel (min-1 ) and the amount of released drug mrel (%) were evaluated. The observable positive effect of carriers was registerred in terms of increasing the dissolution rate and the amount of released drug for both mixed and co-milled mixtures comparing to the raw drug. Mixtures with hypromellose were the exception; the improvement of the monitored parameters was not detected.
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