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Every year, PROWIN A+W Automationstechnik GmbH trains several dual students who end their academic careers with a bachelor’s thesis. The supervision of a master’s thesis, however, was a first for the company.
The two mechanical engineering students Lucas Kronawitter and Robert Zitzelsberger started their professional careers during their studies at PROWIN A+W. Both already completed their bachelor’s thesis at the company and were now about to graduate with a Master of Engineering degree. Last hurdle: The master’s thesis. <\/p>\n
From the beginning, the students were supervised by their mentors and thus developed a suitable topic. This was so extensive and complex that both works dealt with the implementation: <\/p>\n
Entwicklung einer Sicherheitskupplung
Such safety couplings, which are already available on the market, often limit the drive torque via predetermined breaking points, slip or detent mechanisms. Since these are rotating components that are in direct contact with each other, blockage, seizure or similar undesired switch-off behavior cannot be completely ruled out in the event of a fault. Thus, although such couplings are ideally suited for machine applications in terms of safety, they are not approved for personal protection and therefore do not have CE certification. <\/p>\n
Humans and machines work together in a network – even side by side. This poses completely new challenges in terms of occupational safety. Machine applications must not only function faultlessly, but also be safe for people. <\/p>\n
The aim of this project is to develop a magnetic safety coupling specifically designed for use in manually operated machine and plant areas for personal protection applications. At the same time, the foundations are to be laid for CE certification and marketing as a proprietary series product of the company PROWIN A+W Automationstechnik GmbHv. <\/p>\n
In many assembly plants from PROWIN A+W, interfaces between manual work by operating personnel and fully automated, machine processes are used. These interfaces are often found in plants in the form of manual workstations, visual inspection stations or manual loading stations. <\/p>\n
In many cases, these system parts are designed as rotary indexing tables, for example, whose rotatability allows components to be swiveled out of the system for visual inspection or for manual assembly steps. But also in other applications, such as swivel drives of workpiece carriers or motorized supported handling devices without rotary but linear final drive, humans as operating personnel and machines as support come very close to each other. <\/p>\n
Since these are moving machine or system parts that are accessible to people, it is important that they are intrinsically safe. Hazards or injuries that can result from carelessness, malfunction or unintentional movements during operation must be avoided. <\/p>\n
This intrinsic safety can be implemented as the maximum permissible force or energy impact on people at the hazardous point of the plant section. Since the majority of all mechanical rotary or linear end drives use an electric motor as the drive, the maximum permissible force or energy at the end drive can already be restricted directly at the drive motor by limiting the drive torque or the drive speed. <\/p>\n
Within the scope of the master project, a safety coupling with magnetic torque transmission was developed as a possible series product with CE certification, based on a functional principle from the chemical industry, which can be flexibly applied to a required application using a modular principle. The special feature of such a magnetic safety coupling is that the torque transmission between input and output shaft is mechanically completely separated from each other and therefore breakage or component failure of one coupling half does not lead to an unwanted blockage or permanent connection of the drive. <\/p>\n
” content_phone=”<\/p>\n
Every year, PROWIN A+W Automationstechnik GmbH trains several dual students who end their academic careers with a bachelor’s thesis. The supervision of a master’s thesis, however, was a first for the company.
The two mechanical engineering students Lucas Kronawitter and Robert Zitzelsberger started their professional careers during their studies at PROWIN A+W. Both already completed their bachelor’s thesis at the company and were now about to graduate with a Master of Engineering degree. Last hurdle: The master’s thesis. <\/p>\n
From the beginning, the students were supervised by their mentors and thus developed a suitable topic. This was so extensive and complex that both works dealt with the implementation: <\/p>\n
Entwicklung einer Sicherheitskupplung
Such safety couplings, which are already available on the market, often limit the drive torque via predetermined breaking points, slip or detent mechanisms. Since these are rotating components that are in direct contact with each other, blockage, seizure or similar undesired switch-off behavior cannot be completely ruled out in the event of a fault. Thus, although such couplings are ideally suited for machine applications in terms of safety, they are not approved for personal protection and therefore do not have CE certification. <\/p>\n
Humans and machines work together in a network – even side by side. This poses completely new challenges in terms of occupational safety. Machine applications must not only function faultlessly, but also be safe for people. <\/p>\n
The aim of this project is to develop a magnetic safety coupling specifically designed for use in manually operated machine and plant areas for personal protection applications. At the same time, the foundations are to be laid for CE certification and marketing as a proprietary series product of the company PROWIN A+W Automationstechnik GmbHv. <\/p>\n
In many assembly plants from PROWIN A+W, interfaces between manual work by operating personnel and fully automated, machine processes are used. These interfaces are often found in plants in the form of manual workstations, visual inspection stations or manual loading stations. <\/p>\n
In many cases, these system parts are designed as rotary indexing tables, for example, whose rotatability allows components to be swiveled out of the system for visual inspection or for manual assembly steps. But also in other applications, such as swivel drives of workpiece carriers or motorized supported handling devices without rotary but linear final drive, humans as operating personnel and machines as support come very close to each other. <\/p>\n
Since these are moving machine or system parts that are accessible to people, it is important that they are intrinsically safe. Hazards or injuries that can result from carelessness, malfunction or unintentional movements during operation must be avoided. <\/p>\n
This intrinsic safety can be implemented as the maximum permissible force or energy impact on people at the hazardous point of the plant section. Since the majority of all mechanical rotary or linear end drives use an electric motor as the drive, the maximum permissible force or energy at the end drive can already be restricted directly at the drive motor by limiting the drive torque or the drive speed. <\/p>\n
Within the scope of the master project, a safety coupling with magnetic torque transmission was developed as a possible series product with CE certification, based on a functional principle from the chemical industry, which can be flexibly applied to a required application using a modular principle. The special feature of such a magnetic safety coupling is that the torque transmission between input and output shaft is mechanically completely separated from each other and therefore breakage or component failure of one coupling half does not lead to an unwanted blockage or permanent connection of the drive. <\/p>\n
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The system for processing caravan sidewalls glues small metal plates to predefined positions on the inside walls of caravans. To do this, an adhesive is first applied to the corresponding position and the metal plate is then fixed in place. Interior elements such as shelves, cabinets, etc. are later screwed to the positions reinforced with the sheet metal plates. The sheet metal plate laying machine can be equipped with more than 200 different variants of interior walls and glues an average of 60 sheet metal plates per side wall.<\/p>\n
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The fed sheet metal coils are uncoiled fully automatically, aligned and then punched to the appropriate length within one second by a cut-off shear and stacked in magazines. The loaded magazines are fed to a setting head located on the fully automated surface gantry. The 0.8 mm thick sheet metal plates are then separated and sucked into the joining cylinder with the aid of vacuum valves. <\/p>\n
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The planar surface gantry now moves to the corresponding preset positions at a speed of 3m\/min and an acceleration of 3m\/s2. In the respective position, a heated adhesive is applied by means of spin-spray application. Subsequently, the separated sheet metal plates are joined at the joining die with a force of 1.1 kN up to 4kN in the corresponding side wall. Despite the high speed and a cycle time of just 3 seconds, a positioning accuracy of +\/- 1 mm can be guaranteed. The assembled panel is then clocked out of the system for further processing. <\/p>\n
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In the meantime, the number of sheet metal plates, dimensions, etc. of the next plate is determined. If the number of sheet metal plates in the magazine is not sufficient, the magazine is exchanged during the sidewall change.<\/p>\n
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