Проектирование круглых протяжек Вариант 4

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»

1. The routed workpiece: material – cast iron MF;
tensile strength HB 173,
harvesting – after the holiday;
the hole for stretching is treated with a drill;
the diameter of the hole before stretching-d0 = 33.2 H12 mm;
the diameter of the hole after broaching – d = 34 mm H7;
the roughness parameter of the surface ;
stretching length-Ld = 80 mm
Character of the machine: TN
2. Machine: horizontal broaching, model 7B520;
pulling force of the machine Q = 200000 N;
maximum rod stroke length Max = 1250 mm;
operating speed range m / min;
Cartridge type A
3. Character of production-mass production
4. The length of the broach, permissible for the tool shop and correspondence Department, not more than 1500 mm