Tool ring, a method of making it, and a holding tool for use in the performance of the method

Abstract

A tool ring (1) for securing blanks in a machine of the type comprising a pair of rotating rings whose opposite, plane side faces are formed with a plurality of holding tools (8, 11) so adapted that an oblong blank (16) can be secured substantially radially between a pair of holding tools in respective ones of said rings. At least one ring has a groove (4) which is adapted to receive holding tools and spacer tools (9, 10, 10', 12) of which at least the holding tools have a convex face (23, 33) to engage the engagement face (19) of said groove. The holding tools (8, 9, 11) are mutually spaced by the spacer tools, and some of the spacer tools (10, 12) are positioned in the groove, while the position of the spacer tools is defined by the cooperation between edge faces (24, 25, 30, 31) on the tools.

I claim: 
     
       1. A tool ring for securing blanks in a machine of the type comprising a pair of rotating rings where opposite, plane side faces of the rings are formed with a plurality of holding tools so adapted that an oblong blank can be secured substantially radially between a pair of holding tools in respective ones of said rings, and where at least one ring has a groove adapted to receive the holding tools, said tool ring comprising: spacer tools adapted to be fixed relative to the groove between the holding tools, each of said spacer tools and adjacent holding tools have cooperating wedge faces, one or more holding tools being secured between a pair of spacer tools, for forcing the holding tools into engagement with an engagement face of the groove, which face is disposed coaxially with the axis of the ring.   
     
     
       2. A tool ring according to claim 1, wherein planes of the opposite rings form a small angle with each other, the bottom of the groove in one ring being parallel with the plane of the ring, and the bottom of the groove in the other ring forms an angle with a radius in said ring corresponding to said angle between the ring planes. 
     
     
       3. A tool ring according to claim 1, wherein a plurality of spacer tools with uniform arc distance is adapted to be fixed in a direction toward the said engagement face, and said cooperating wedge faces intersect the plane of the respective ring in intersection lines which converge in a direction toward the center of the ring. 
     
     
       4. A tool ring according to claim 1, wherein a plurality of spacer tools disposed with a uniform arc distance is adapted to be fixed in a direction toward the bottom of the associated groove, and that said cooperating wedge faces intersect the plane of the associated ring in mutually parallel lines. 
     
     
       5. A method of making a tool ring according to claim 1, comprising forming one side face with a groove which is co-axial with the axis of the ring and in which holding tools and spacer tools are alternately mounted, and providing the groove with guides for positioning of at least some of the spacer tools, and fixing at the least the positioned spacer tools evenly so that the other tools are clamped uniformly in the groove because of the cooperation between wedge faces on the tools. 
     
     
       6. A method according to claim 5, comprising clamping the positioned tools radially outwardly. 
     
     
       7. A method according to claim 5, comprising clamping all the tools axially toward the bottom of the groove. 
     
     
       8. A holding tool for use in the performance of the method according to claim 5, wherein the tool has a plane underside and top side which is parallel with said underside and is formed with a track to receive an oblong blank, said track extending radially with respect to a pair of opposite, preferably mutually co-axial end faces which extend transversely to the top side and the underside, and a pair of opposite side faces forming substantially uniform acute angles with a plane defined by said track and the axis common to the concentric end faces. 
     
     
       9. A holding tool according to claim 8, wherein the opposite side faces form a right angle with a plane perpendicular to said common axis. 
     
     
       10. A holding tool according to claim 8, wherein the opposite side faces intersect a plane perpendicular to the said common axis in lines which are parallel with said track. 
     
     
       11. A tool ring according to claim 1, further comprising spacer tools adapted to be positioned relative to the groove without being fixed. 
     
     
       12. A tool ring according to claim 11, wherein all cooperating faces of the holding tools disposed between a pair of spacer tools are constructed as wedge faces cooperating in pairs. 
     
     
       13. A tool ring according to claim 1, wherein all cooperating faces of the holding tools disposed between a pair of spacer tools are constructed as wedge faces cooperating in pairs. .Iadd. 
     
     
       14.  A holding tool for use in a tool ring for securing blanks in a machine, of the type comprising a pair of rotating rings where opposite plane side faces of the rings are formed with a plurality of holding tools so adapted that an oblong blank can be secured substantially radially between a pair of holding tools in respective ones of said rings, and where at least one ring has a groove adapted to receive the holding tools said holding tool having a plane underside and top side which is parallel with said underside and is formed with a track to receive the oblong blank, said track extending radially with respect to a pair of opposite end faces which extend transversely to the top side and the underside, and a pair of opposite side faces forming substantially uniform acute angles with a plane defined by said track and the axis common to the end faces, said side faces being oriented so as to act in wedging relationship relative to cooperating wedge faces of adjacent spacer tools arranged in an alternating manner with a plurality of said holding tools in the groove in the tool ring for forcing the holding tools into engagement with an engagement surface of said groove. .Iaddend. .Iadd.15. A holding tool according to claim 14, wherein the opposite side faces form a right angle with a plane perpendicular to said common axis. .Iaddend. .Iadd.16. A holding tool according to claim 14, wherein the opposite side faces intersect a plane perpendicular to the said common axis in lines which are parallel with said track. .Iaddend. .Iadd.17. A holding tool for securing an oblong blank in a tool ring where opposite plane side faces of the ring contains a number of holding tools and spacer tools, said holding tools treating the blank by applying a force in the longitudinal direction of the blank, said holding tool having a plane underside and a top side which is parallel with said underside and formed with a track to receive the oblong blank and to retain it against the longitudinal force, said track extending radially with respect to a pair of opposite end faces which of at least one is convexly arc-shaped for transmitting said longitudinal force to a radially inwardly cylindrical supporting face of the tool ring for a number of holding tools, said end faces extending transversely to the top side and the underside, and said tool further comprising a pair of opposite side faces, the planes of the side faces intersecting each other in a line parallel with the axis of the arc-shaped end face and positioned between said axis and the holding tool. .Iaddend. .Iadd.18. A holding tool for securing an oblong blank in a tool ring where opposite plane side faces of the ring contains a number of holding tools and spacer tools, said holding tools treating the blank by applying a force in the longitudinal direction of the blank said holding tool having a plane underside and a top side which is parallel with said underside and formed with a track to receive the oblong blank and to retain it against the longitudinal force, said track extending radially with respect to a pair of opposite end faces of which at least one is convexly arc-shaped for transmitting said longitudinal force to a radially inwardly cylindrical supporting face of the tool ring for a number of holding tools, said end faces extending transversely to the top side and the underside, and said tool further comprising a pair of opposite side faces, the planes of the side faces intersecting each other in a line perpendicular to the axis of the arc-shaped end face and positioned above said top side. .Iaddend. .Iadd.19. A holding tool according to claim 17, wherein the opposite side faces form a right angle with a plane perpendicular to a common axis. .Iaddend. .Iadd.20. A holding tool according to claim 18, wherein the opposite side faces intersect a plane perpendicular to the a common axis in lines which are parallel with said track. .Iaddend.