Abstract: A beveling apparatus, for manufacturing screws and the like, includes a fixed support structure, which includes a first motor unit and a second motor unit which actuate a pliers unit adapted to lock an item to be machined and associated with a movable supporting structure. The first motor unit is constituted by a pair of linear motors having rotors associated with a carriage which actuates the pliers unit. The second motor unit has a pair of linear motors having rotors associated with the movable supporting structure so as to actuate the axial movement of the movable supporting structure with respect to the fixed supporting structure in order to define at least two operating positions of the pliers unit; a position for picking up and unloading the item to machined, in which the pliers unit is at a certain distance from a machining head of a machine tool, and a position for machining the item, in which the pliers unit is located at the machining head of a machine tool.

Abstract: A beveling apparatus, for manufacturing screws and the like, includes a fixed support structure, which includes a first motor unit and a second motor unit which actuate a pliers unit adapted to lock an item to be machined and associated with a movable supporting structure. The first motor unit is constituted by a pair of linear motors having rotors associated with a carriage which actuates the pliers unit. The second motor unit has a pair of linear motors having rotors associated with the movable supporting structure so as to actuate the axial movement of the movable supporting structure with respect to the fixed supporting structure in order to define at least two operating positions of the pliers unit; a position for picking up and unloading the item to machined, in which the pliers unit is at a certain distance from a machining head of a machine tool, and a position for machining the item, in which the pliers unit is located at the machining head of a machine tool.

Abstract: An automatic rolling machine with flat chasers, comprising a motionless plate and a movable plate. The movable plate is fixed to a supporting structure that has a reciprocating motion actuated by means of a spindle, crank and linkage, the spindle being supported by a base. The base comprises a first motionless part, which is rigidly coupled to the frame of the machine, and a second movable part, which constitutes the support for the spindle, the position of the movable part with respect to the motionless part being adjustable by a means for varying the position of the movable part with respect to the motionless part.

Abstract: A method for inserting blanks to be threaded in automatic rotary rolling machines, in which the step for inserting parts to be machined in the working position occurs at an adjustable, optimized rate, so that the portions of the outer surface of the roller tool affected by contact with the parts that have been inserted vary continuously at each turn of the spindle. This provides a significant reduction in surface wear of the roller, extending its useful life. The invention also relates to an automatic rotary rolling machine.

Abstract: An automatic rolling machine with flat chasers, comprising a motionless plate and a movable plate that is fixed to a support that has a reciprocating motion actuated by a chuck, by means of a rod-and-crank system, the chuck being rigidly coupled to a base. The base comprises a first motionless part, which is rigidly coupled to the frame of the machine, and a second movable part, which constitutes the support of the chuck, the position of the movable part with respect to the motionless part being adjustable by a means for varying the position of the movable part with respect to the motionless part.

Abstract: An insertion device, particularly for automatic rolling machines, which includes a reciprocation member that is provided with a means adapted to pick up a part to be machined from a guide and insert said part in a working position, wherein the reciprocating member is actuated by a linear motor.

Abstract: A method for inserting blanks to be threaded in automatic rotary rolling machines, in which the step for inserting parts to be machined in the working position occurs at an adjustable, optimized rate, so that the portions of the outer surface of the roller tool affected by contact with the parts that have been inserted vary continuously at each turn of the spindle. This provides a significant reduction in surface wear of the roller, extending its useful life. The invention also relates to an automatic rotary rolling machine.