|
|
New aspects of MIG/MAG welding
Týn, Zbyněk ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis is focused on the latest welding technology MIG / MAG. Between which such us method of Cold Metal Transfer or Advanced CMT. These new techniques are mainly used for welding thin sheets. They integrate gradually into the connecting of various types materials and also bulky welded structures. All of this is demonstrated thanks to the management and control of the welding process.
|
|
| |
|
|
Welding problems of the „press chamber“ component
Čermák, Petr ; Dohnal, Ivo (referee) ; Kubíček, Jaroslav (advisor)
Petr Čermák: Welding problems of the "press chamber" component The goal of this work is to produce the "press chamber" component of a food industry machine and selection of a suitable arc welding method, a base and a filler material. Practical part of this work includes technological design of a weldment production process considering all the know-how concerning welding technology, heating process of a stainless steel and a weld quality testing. Especial emphasis is put on analyzing of deformations and residual stresses during welding and taking countermeasures to reduce these undesired defects in the "press chamber" weldment made of high alloy austenitic steel. The final output is the "press chamber" component and a welding jig design reducing occurrence of the undesired deformations or residual stresses.
|
|
|
Welding technology of the "fuel cell" component
Vaculka, Jakub ; Dohnal, Ivo (referee) ; Kubíček, Jaroslav (advisor)
The project aimed at the selection of the optimal welding method for a „fuel cell“ component in terms of the VN-Ú Ltd engineering company. The goal is to compare the methods available in VN-Ú, that is: TIG, MIG/MAG and CMT. It is necessary to analyze the specifics of each of the technologies and the operation conditions which the component will be exposed to. For the comparison of the methods, non-destructive testing of the components, as well as destructive tests of the produced samples have been used. The economic evaluation has been used to compare the costs of different welding methods of the components and to assess the potential investments in CMT device that has only been leased by VN-U so far.
|
|
|
Comparison of cost price on welding and Virtual Welding
Dolejský, Tomáš ; Felix, Michal (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with a potential application of welding simulators in basic courses of welding held in welding schools. The first section briefly describes the welding simulators in the global market. There is a detailed description and the control of the welding simulator Virtual Welding, a description of core courses of welding and the necessary welding technology in the following section. Experiments with a welding simulator are carried out in the last section and also their evaluation, comparison and summary of costs.
|
|
|
MIG/MAG welder with switching power supply
Klejma, Michael ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
This diploma thesis deals with design of welding power supply for MIG / MAG and MMA technique with continuous output current 120 A. The first, theoretical part is devoted to welding process technology, physical characteristics of electric arc and description of individual welding methods. The thesis also deals with the concept of power converter. The design of the switched-mode power supply is based on a full bridge topology. In order to implement advanced controls of welding power supply, the ARM Cortex M4 microprocessor was selected. Due to the large power consumption of the stepper motor for drive the welding wire, an auxiliary switched-mode power supply was also implemented. The documentation describing the realization of the welding power supply and the results of the measurements are in the last part of the thesis. The welding power supply was successfully revived and reached nominal parameters. Inert gas welding has not been tested yet, due to lack of time caused by extensive work in order to complete mechanical realization.
|
|
|
New aspects of MIG/MAG welding
Minich, Marek ; Hála, Michal (referee) ; Kubíček, Jaroslav (advisor)
The thesis discusses the welding method MIG/MAG and the methods based on it. These methods are CMT and CMT Advanced which are currently still being improved. In the work are described their principles, benefits, uses and devices that allow welding by those methods. The thesis deals with the issue of a joint of steel and aluminum which is no longer an obstacle in welding due to CMT. This is a huge benefit especially for the automotive and aerospace industries, for which the solid and fast connection between steel and aluminum is a very desired matter. Further, there are welds of thin sheets described and discussed and also a list of wide range of practical uses for these welding methods.
|
|
|
Design of equipment for welding head path correction
Benáček, Filip ; Jaroš, Aleš (referee) ; Slaný, Martin (advisor)
The work presents the problem of welding of membrane walls intended for application in power boilers. Furthermore, the use of the MIG/MAG method for welding and the advantages of using the CMT method. An innovation has been made for the welding process in the form of laser scanning of the surface and subsequent use of the data to correct the welding head. This led to the automation of the whole process. Because of the necessary testing of the laser scanner function, a test structure was designed and constructed. It was necessary to consider the appropriate wall scanning strategy and subsequent data processing in terms of the overall manufacturing process. The software designed to evaluate the scanned profile placed a point using a suitable tool on the scanned profile. The set of points was further filtered for a smoother resulting path formed by these points. The resulting points were fed to the output signal from the laser device to correct the path of the welding head. Both the welding and the surface scanning will be done simultaneously, so the settings for the laser scanner were created and stored in the internal unit of the device. This allows the laser to operate without connecting to a computer.
|
|
|
Design of equipment for welding head path correction
Benáček, Filip ; Jaroš, Aleš (referee) ; Slaný, Martin (advisor)
The work presents the problem of welding of membrane walls intended for application in power boilers. Furthermore, the use of the MIG/MAG method for welding and the advantages of using the CMT method. An innovation has been made for the welding process in the form of laser scanning of the surface and subsequent use of the data to correct the welding head. This led to the automation of the whole process. Because of the necessary testing of the laser scanner function, a test structure was designed and constructed. It was necessary to consider the appropriate wall scanning strategy and subsequent data processing in terms of the overall manufacturing process. The software designed to evaluate the scanned profile placed a point using a suitable tool on the scanned profile. The set of points was further filtered for a smoother resulting path formed by these points. The resulting points were fed to the output signal from the laser device to correct the path of the welding head. Both the welding and the surface scanning will be done simultaneously, so the settings for the laser scanner were created and stored in the internal unit of the device. This allows the laser to operate without connecting to a computer.
|
|
|
MIG/MAG welder with switching power supply
Klejma, Michael ; Červinka, Dalibor (referee) ; Martiš, Jan (advisor)
This diploma thesis deals with design of welding power supply for MIG / MAG and MMA technique with continuous output current 120 A. The first, theoretical part is devoted to welding process technology, physical characteristics of electric arc and description of individual welding methods. The thesis also deals with the concept of power converter. The design of the switched-mode power supply is based on a full bridge topology. In order to implement advanced controls of welding power supply, the ARM Cortex M4 microprocessor was selected. Due to the large power consumption of the stepper motor for drive the welding wire, an auxiliary switched-mode power supply was also implemented. The documentation describing the realization of the welding power supply and the results of the measurements are in the last part of the thesis. The welding power supply was successfully revived and reached nominal parameters. Inert gas welding has not been tested yet, due to lack of time caused by extensive work in order to complete mechanical realization.
|
guest ::
