| 摘要 |
mechanical engineering. SUBSTANCE: reduction gear consisting of a number of permanent-engagement gears is secured inside body. Driven pulley of reduction gear is provided for removal of central gear from shaft and installation of idle gear instead, which makes it possible to obtain two rotational speeds of output shafts carrying grinding heads. The latter have fastening assemblies of the dovetail type for arrangement of abrasive members in them. Abrasive members are made flat and trapezoidal in plan with inclined lateral walls and with large trapezium bases installed opposite to each other. Working wheels of machine are mounted on axle on side of body opposite to side of reduction arrangement. They may be lifted and secured on body. Use of the machine allows reduction of time required for replacement of abrasive members. EFFECT: increased quality of working. 4 cl, 6 dwg
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