| 摘要 |
FIELD: lighting engineering. SUBSTANCE: frame of lighting device has internal and external flanges interconnected by straps. Salient feature of frame consists in fact that all parts of frame are stamped out as one flat billet with points of connection of straps to flanges displaced one with reference to another by some angle alpha.. After die-stamping internal flange rises above external one with turn through some angle gamma,. In this case 0 <<EMI ID=0.434 HE=3 WI=21 TI=CHI>. For operation under conditions of vibrations and shock loads frame is reinforced by installation of two identical billets one into another so that straps act at angle in opposition one to another forming rigid grid structure. EFFECT: reduced usage of materials and labor input, expenses and production cost. 3 cl, 11 dwg |
