Tool for producing camshafts by expanding

A device for holding in orientation, around a reference axis, a flat cam with an ovoid peripheral contour perforated by an orifice through which a tubular shaft can be passed, an axis of the tubular shaft coinciding with the reference axis, in view of fixation of the cam on the shaft by expanding the shaft, comprising:

• a body provided with a transverse passage for the shaft and with an introduction conduit for introduction of the cam, the introduction conduit opening at a first end into the transverse passage and at a second end at a periphery of the body;
• means for holding the cam in the introduction conduit in a waiting position in which the orifice is at least approximately coaxial with the transverse passage;
• two first sliding blocks, spaced apart and parallel, interlockingly mounted to move translationally in the body in a manner that is at least substantially orthogonal to the transverse passage for the shaft, the first sliding blocks being elastically spread apart from the transverse passage by first elastic means, with their external ends projecting outside the body on a first side of the body and their internal ends disposed facing a part of the ovoid peripheral contour of the cam when the cam is in a waiting position;
• two second sliding blocks, spaced apart and parallel, in mirror-image relationship to the first sliding blocks and interlockingly mounted to move translationally in the body, in a manner that is at least substantially orthogonal to the transverse passage for the shaft, the second sliding blocks being elastically spread apart from the transverse passage by second elastic means, with their external ends projecting outside the body on a second side of the body, and their internal ends disposed facing another part of the ovoid peripheral contour of the cam when the cam is in the waiting position;
• and
• a mechanical linkage connecting the first and second sliding blocks such that, when the first sliding blocks are pressed against action of the first elastic means to displace the internal ends of the first sliding blocks toward a part of the ovoid peripheral contour of the cam until contact is made therewith, the second sliding blocks are pressed by the mechanical linkage against action of the second elastic means to displace the internal ends of the second sliding blocks toward a second part of the ovoid peripheral contour of the cam until contact is made therewith.