Method for manufacturing a disc brake disc

A method for manufacturing a brake disc, said method comprising:

• providing at least one sheet of predefined thickness;
• blanking a first disc-shaped portion in said at least one sheet, adapted to make a first plate of a ventilated braking band;
• blanking a second disc-shaped portion in said at least one sheet, adapted to make a second plate of said ventilated braking band;
• blanking a third portion in said at least one sheet, adapted to make at least one ventilation spacer for said ventilated braking band;
• drawing said third portion by shaping, along a circular path along said third portion, first and second protrusions, forming opposite first and second recesses, adapted to make ventilation channels for said ventilated braking band;
• wherein
• a step of stamping and/or drawing bosses in said first and/or second disc-shaped portion and/or ventilation spacer is provided either simultaneously with or subsequently to said blanking steps to form recesses and/or raised portions suited for localized and/or spot welding;
• connecting said first disc-shaped portion to said first protrusions by discontinuous weld spots at said bosses;
• and
• connecting said second disc-shaped portion to said second protrusions by discontinuous weld spots at said bosses.