Machine for simultaneously forming threads or fins on multiple cylindrical workpieces

A machine for simultaneously forming helical fins or threads on the exterior of first, second, third and fourth elongated cylindrical workpieces, comprising:

• first, second, third and fourth arbor blocks arranged in a common plane and spaced 90.degree. apart about a center point in the plane;
• first, second, third and fourth fin or thread forming discs rotatably affixed respectfully to said first, second, third and fourth arbor blocks;
• first, second, third and fourth guides longitudinally displaceably and rotationally receiving respectively the first, second, third and fourth workpieces whereby the first workpiece is guided by the first guide between said first and second discs, the second workpiece is guided by the second guide between said second and third discs, the third workpiece is guided by the third guide between said third and fourth discs and the fourth workpiece is guided by the fourth guide between said first and fourth discs;
• and
• rotary energy transfer linkages for imparting rotation to at least one of said discs.

A machine for simultaneously forming helical fins or threads on the exterior of a plurality of at least three elongated cylindrical rotatable workpieces, each having a workpiece axis of rotation, comprising:

• a plurality of arbor blocks equal in number to the number of cylindrical workpieces and arranged in a common plane and spaced apart about a center point in the plane;
• a fin or thread forming disc rotatably affixed to each of said arbor blocks, each disc having an axis of rotation;
• a separate guide longitudinally displaceably and rotationally supporting each of said workpieces whereby said workpieces are guided between adjacent discs, the discs serving to form threads or fins on the workpieces;
• and
• a rotary energy coupler for imparting rotation to at least one of said discs, the axes of rotation of said workpieces as rotatably supported by said guides and the axes of rotation of said discs being parallel, the axis of rotation of each workpiece being in a plane of the axes of rotation of adjacent discs.