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OwnerWarren Joseph Crane, Russell Bancroft Collins +1inventors
InventorsWarren Joseph Crane, Russell Bancroft Collins, Charles Warren Crane
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A forming tool comprising a rigid frame, clamping jaws on the frame for clamping a hollow tube with the end to be formed in a position of alignment with a forming head mounted on the frame for linear movement toward the end of the clamped tube and for rotation about the axis of the tube, said clamping jaws containing an opening for receiving the forming head as it is advanced into engagement with the tube, and said forming head containing a fustrum conical forming cavity for engagement with the end of the tube within which the end of the tube is wholly formed. A pilot is provided within the forming cavity for maintaining the concentricity of the tube and forming cavity during the forming operation. The entire surface of the forming head is coated with a non-electrolytically applied surface coating of nickel.
A tool for forming a head at one end of a hollow tube made of a deformable material, said tool comprising an anvil containing a cylindrical opening of predetermined diameter greater than the diameter of the head to be formed at the end of the tube, means for clamping the tube with the end to be formed into a head extending into said opening in concentric relation thereto, a die supported in axial alignment with the cylindrical opening in the anvil for rotation and rectilinear movement toward the cylindrical opening, a cylindrical tip at the leading end of the die, interengageable within the cylindrical opening by movement of the die toward the cylindrical opening, said cylindrical opening having a predetermined depth and having at its bottom a flat annular surface at right angles to the axis of the cylindrical opening, and said cylindrical tip having a flat end surface at right angles to the axis of the die for engagement with the flat annular surface at the bottom of the cylindrical opening and containing at said end an axially extending cylindrical pilot member of a diameter corresponding to the inside diameter of the tube for reception within the tube as the die is advanced into the cylindrical opening, and surrounding said pilot member an annular opening comprising an axially extending cylindrical portion at the end face, inwardly of the cylindrical portion a frustoconical portion and at the inner end of the frustoconical portion an annular portion, screw means mounting the die for movement toward the cylindrical opening in the anvil to force the cylindrical tip into the cylindrical opening into engagement with the end of the tube and by a combination of rotation and rectilinear movement, reform the metal of the wall while the latter is supported internally by the pilot member so as to cause the metal of the wall of the tube to conform in solid section to the annular space surrounding the pilot member.
Dependencies are inferred from the claim text.