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Pri izdelavi podsklopov rotorjev prototipnih servomotorjev avtomobilskih krmilnih sistemov je potrebno nenamagnetene permanentne magnete nalepiti na jedra rotorjev s pomočjo ustreznega montažnega orodja. Pri tem želimo pospešiti postopek lepljenja in izboljšati natančnost pozicioniranja nenamagnetenih magnetov na jedru rotorja servomotorja ter s tem zmanjšati izmet prototipnih rotorjev. Opravili smo vhodno kontrolo magnetov in jeder rotorjev ter tako zmanjšali možnost napak zaradi slabe kakovosti dobavljenih delov. Preračunali smo obremenitev lepljenih spojev in izmerili silo vzmeti, ki drži magnet ob jedro med postopkom lepljenja. Nato smo ob upoštevanju vseh pomembnih dimenzijskih in geometrijskih toleranc rotorja skonstruirali novo montažno orodje. Izdelano orodje smo uporabili za izdelavo desetih podsklopov rotorjev, na katerih smo natančnost položajev magnetov na jedru primerjali z desetimi podsklopi, izdelanimi s starim orodjem. Merili smo tudi čas, porabljen za izdelavo podsklopa z obema orodjema, in ugotovili, da je čas izdelave pri uporabi novega orodja krajši za povprečno 18,2 sekund. Z novim orodjem smo dosegli v povprečju za 22 % boljšo natančnost položaja permanentnih magnetov na valjastem obodu jedra rotorja, kot je bila dosežena pri uporabi starega orodja. Glede natančnosti zunanjih premerov rotorjev smo z obema orodjema izgotovili 100% delež ustreznih podsklopov glede na zahtevane tolerance. Pridrževalni sistem novega orodja je uspešno odpravil privzdigovanje jedra med lepljenjem. In the manufacture of subassemblies of prototype servomotors rotors of automotive steering systems, non-magnetized permanent magnets must be affixed to the rotor cores by means of suitable mounting tools. We want to speed up the bonding process and improve the positioning accuracy of non-magnetized magnets on the core of the servomotor rotor, thus reducing the ejection of prototype rotors. We performed an input check of magnets and rotor cores, thus reducing the possibility of errors due to the poor quality of the delivered parts. The load on the bonded joints was calculated and the force of the spring holding the magnet to the core during the bonding process was measured. Then, considering all the important dimensional and geometric tolerances of the rotor, we designed a new mounting tool. The tool was used to make ten sets of rotors, where the accuracy of magnet positions on the core was compared with ten sets made with the old tool. We also measured the time taken to produce a subassembly with both tools and found that the manufacturing time when using the new tool was shorter by an average of 18.2 seconds. The new tool improved the accuracy of the position of permanent magnets on the cylindrical surface of the rotor core by an average of 22% compared to the one achieved when using the old tool. With regard to the accuracy of the outer diameters of the rotors, a 100% proportion of the corresponding subassemblies was obtained with both tools according to the required tolerances. The retaining system of the new tool successfully eliminated any core lifting during the bonding process. |
