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Overview of new trends in the construction of short arms.
Fišer, Petr ; Hort, Filip (referee) ; Svoboda, Petr (advisor)
The objective of bachelor´s work is survey type of construction short arms namely pistol and revolvers. The first chapter bachelor´s work includes analysis of the main and others parts, this patrs are located pistols and revolvers. In the following chapter is historical evolution with dividing according to primary objective type of construction and description of several fulfilment revolver and revolvers. The last chapter evaluate contemporary and future tendency of development in constructions short arms.
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Suggestions for changes in the production of a part "revolver trigger"
Jiráček, Jan ; Chladil, Josef (referee) ; Kalivoda, Milan (advisor)
The study deals with production technology of “revolver trigger“. Final assembly is short firearm ALFA Steel and its model series of ALFA-PROJ, Ltd company. Introduction submits an explanation of trigger technology suitability. The following analysis describes current manufacturing process, which has manufacturing inaccuracy problem. Furthermore rootcause of manufacturing inaccuracy was determined and analysis of suggestions for changes (including modifications of technological process) was realized. Based on experiment dimensions were measured on provided samples of suggest production in Technical Control Department. Dimensions of triggers manufactured by current production were verified during the experiment too. Results were compared according to the rejects of production. In the final phase of the study manufacturing labor costs were compared for the one piece of trigger with the new suggested technology.
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Design of inspection procedure for selected revolver components
Úlehlová, Eva ; Šrámek, Jan (referee) ; Jankových, Róbert (advisor)
The goal of this master’s thesis was design of the inspection procedure for hammer and trigger of the specific revolver model. Thesis was developed in cooperation with the manufacturer of the revolvers. The theoretical part deals with the MSA methodology, which is used to assess acceptability of measurement systems. The practical part describes the current measurement system and performs gage repeatability and reproducibility study. It was confirmed that the current measurement system requires improvement. Subsequently coordinate systems were designed, based on functional features of the hammer and trigger. Automated optical measurements, based on the coordinate systems, were performed. The results from these measurements were again assessed by the gage R&R study. The analysis confirmed improvement of acceptability of the designed measurement systems. Based on these results, it is recommended to apply suggested procedures in practice. Results and recommendations of this master’s thesis can contribute to develop metrology in the company and improve the existing measurement system.
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Production technology of part barrel shroud
Jiráček, Jan ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The study deals with technology of "sport steel" barrel shroud part made from a rod semi-product. It makes part of final assembly of a short firearm - ALFA steel revolver, Sport model, of ALFA - PROJ, Ltd. Czech company. Recherche introduction explains basic tooling (its history, tool material's development, milling and hole machining). Furthermore, it is submits an explanation to general arms division and analysis of barrel shroud technology suitability. The following technology process analysis describes the barrel shroud manufacturing process in the aforementioned company. Study's last part shows possible suggestions for manufacturing improvements and rationalizing measures.
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Design of inspection procedure for selected revolver components
Úlehlová, Eva ; Šrámek, Jan (referee) ; Jankových, Róbert (advisor)
The goal of this master’s thesis was design of the inspection procedure for hammer and trigger of the specific revolver model. Thesis was developed in cooperation with the manufacturer of the revolvers. The theoretical part deals with the MSA methodology, which is used to assess acceptability of measurement systems. The practical part describes the current measurement system and performs gage repeatability and reproducibility study. It was confirmed that the current measurement system requires improvement. Subsequently coordinate systems were designed, based on functional features of the hammer and trigger. Automated optical measurements, based on the coordinate systems, were performed. The results from these measurements were again assessed by the gage R&R study. The analysis confirmed improvement of acceptability of the designed measurement systems. Based on these results, it is recommended to apply suggested procedures in practice. Results and recommendations of this master’s thesis can contribute to develop metrology in the company and improve the existing measurement system.
|
|
|
Suggestions for changes in the production of a part "revolver trigger"
Jiráček, Jan ; Chladil, Josef (referee) ; Kalivoda, Milan (advisor)
The study deals with production technology of “revolver trigger“. Final assembly is short firearm ALFA Steel and its model series of ALFA-PROJ, Ltd company. Introduction submits an explanation of trigger technology suitability. The following analysis describes current manufacturing process, which has manufacturing inaccuracy problem. Furthermore rootcause of manufacturing inaccuracy was determined and analysis of suggestions for changes (including modifications of technological process) was realized. Based on experiment dimensions were measured on provided samples of suggest production in Technical Control Department. Dimensions of triggers manufactured by current production were verified during the experiment too. Results were compared according to the rejects of production. In the final phase of the study manufacturing labor costs were compared for the one piece of trigger with the new suggested technology.
|
|
|
Production technology of part barrel shroud
Jiráček, Jan ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The study deals with technology of "sport steel" barrel shroud part made from a rod semi-product. It makes part of final assembly of a short firearm - ALFA steel revolver, Sport model, of ALFA - PROJ, Ltd. Czech company. Recherche introduction explains basic tooling (its history, tool material's development, milling and hole machining). Furthermore, it is submits an explanation to general arms division and analysis of barrel shroud technology suitability. The following technology process analysis describes the barrel shroud manufacturing process in the aforementioned company. Study's last part shows possible suggestions for manufacturing improvements and rationalizing measures.
|
|
|
Overview of new trends in the construction of short arms.
Fišer, Petr ; Hort, Filip (referee) ; Svoboda, Petr (advisor)
The objective of bachelor´s work is survey type of construction short arms namely pistol and revolvers. The first chapter bachelor´s work includes analysis of the main and others parts, this patrs are located pistols and revolvers. In the following chapter is historical evolution with dividing according to primary objective type of construction and description of several fulfilment revolver and revolvers. The last chapter evaluate contemporary and future tendency of development in constructions short arms.
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