Проектирование протяжки прямобочных шлицев Вариант 22

GRECHISHNIKOV V. A., CHEMBARISOV N. And.,
SKHIRTLADZE A. G., STUPKO V. B., HISAMUTDINOV R. M., Matveev V. N., sukhinina L. A., LARIONOV D. N.
THE DESIGN OF CUTTING TOOL
Tutorial to perform
course project on discipline
«Cutting tool»

2.1. Source data:
1. Stretched workpiece: material-40X GOST 4543-71, hardness when stretching HB=302, the hole for stretching is treated with a drill; hole diameter before stretching (mm) - d0=16.5 mm; hole diameter after stretching D=20 mm; surface roughness parameter D, d =Ra=3,2; b=6,3 stretching length - Lg=30 mm.
2. Machine: model 7A520; the pulling force of the machine FROM= 200 kN; the maximum stroke of the carriage broaching machine Nst= 1600 mm; the range of operating speeds m / min, the condition of the machine is satisfactory.
3. The nature of the production details – mass.
4. The length of the broach, permissible for the tool shop and correspondence Department, not more than 1500 mm.