| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: proposed device comprises frame 1 with two front spaced apart parts 17, 18 and two pairs of guide rods (19, 19'; 20, 20') arranged parallel with lengthwise axis 42 to rigidly joint said front parts together. Round files 14, 15 and flat file 16 are arranged parallel with said lengthwise axis 42. Flat file wide faces (39, 39') are retained at front parts 17, 18 with no clearance. Said pairs of guide rods (19, 19'; 20, 20'), round files 14, 15 and flat file wide faces (39, 39') are arranged with rotation symmetry about lengthwise axis 42. ^ EFFECT: grinding of alternating teeth without readjustment. ^ 16 cl, 7 dwg |
