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V magistrskem delu smo zasnovali novo obliko sponke za paketiranje rotorjev v progresivnem paketirnem izsekovalnem orodju. Preveriti smo želeli vpliv geometrije nove sponke na konstrukcijo orodja ter delaminacijsko silo izdelanih paketov. Na trgalnem stroju smo s pomočjo zasnovane priprave izmerili izdelovalno silo vtiskovanja izbranih oblik sponk v tri različne pločevine. S tremi oblikami sponk pa smo izdelali še rotorske pakete v progresivnem izsekovalnem orodju ter opravili meritve delaminacijske sile izdelanih paketov na trgalnem stroju. Preverili smo tudi vpliv anizotropije pločevine na pozicijo sponke. Ugotovili smo, da pri vtiskovanju sponk z nadmero noža glede na matrico dosežemo nekoliko večjo silo, a jo s posnetjem na nožu lahko reguliramo. Preizkusi so pokazali, da posnetje zniža izdelovalno silo pri vtiskovanju sponk z nadmero, pri standardni obliki pa nima vpliva. Meritve delaminacijske sile paketov z različnimi oblikami sponk so pokazale, da imajo paketi izdelani s sponkami z nadmero minimalno manjšo delaminacijsko silo, a smo z njimi dobili boljšo ponovljivost preizkusov. Ugotovili smo, da nova oblika sponke nima negativnega vpliva na konstrukcijo orodja in prav tako ne na delaminacijsko silo paketov, ima pa pozitiven vpliv na stabilnost ter skrajšanje časa preizkušanja orodja. In this masters thesis we have designed a new shape of interlocking staples for the manufacture of rotor packages. We have investigated the effect of the new shape of staples on tool design and package delamination force. First we measured the force needed for production of staples for all of the desired shapes on three different metal sheets. Three of the tested staples shapes, were then chosen for production of rotor cores in a progressive interlocking blanking tool. Delamination forces of produced rotor cores were measured on a tensile strength measuring machine. We came to a conclusion, that slightly more force is needed for stamping of staples with punch with surplus measure than for the normal sized staples, but adding chamfer on the punch helps lower the stamping force for the surplus measured staples. Delamination force measurements of the produced rotor cores have showed us, that cores stacked with the new shape staples tend to delaminate a little easier than the ones made with usual shaped staples. On the other hand we can conclude that delamination forces of rotor cores made with new staples are more predictable due to lower standard deviation of the measurement. We came to understand that the new shape of clips does not have any notable downsides to the construction of progressive blanking tool or to rotor stack delamination force. We also realized that the new shape of clips has positive influence on production stability and tool testing period. |
