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US 2018/0222710 A1Published application
Novel turn
OwnerAndrew Frederick Wahlberg, JR., Anthony Alessandriniinventors
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Abstract
A mandrel with a biasing assembly that extends the mandrel's life for turning of sheet materials. The mandrel's biasing assembly having a pivot, sleeve, cup and screw that connect a gripper to the arbor and works to alleviate the forces that can cause damage to such a winding machine.
Claims9
An apparatus comprising:
- an arbor;
- the arbor having at least one first bore;
- a longitudinal axis of the at least one first bore being relatively perpendicular to an axis of the arbor;
- the at least one first bore being threaded;
- at least one pivot;
- the at least one pivot having ears;
- the at least one pivot having a screw receiving portion;
- the screw receiving portion being threaded;
- at least one sleeve;
- the at least one sleeve having an upper end;
- the upper portion being threaded;
- the at least one sleeve having a lower end;
- the at least one sleeve having a plurality of ear receiving ports;
- the plurality of ear receiving ports located at the lower end;
- the at least one sleeve having a first hole;
- the first hole situated at the upper end;
- the at least one sleeve and the at least one pivot being connected such that the ears are engaging with the ear receiving ports;
- a gripper;
- the gripper having at least one second bore;
- the gripper being situated adjacently to the arbor such that a longitudinal axes of the at least one second bore is relatively aligned with the longitudinal axis of the at least one first bore together the axes being relatively perpendicular to the axis of the arbor;
- at least one cup;
- the at least one cup having a second hole;
- the at least one cup being located within the at least one second bore;
- the at least one sleeve being inserted into the at least one first bore;
- the lower end being situated proximately to the axis of the arbor;
- the upper end being threadably attached to the one first bore;
- the second hole being adjacent to the upper end;
- a screw;
- the screw passing through the second hole;
- the screw passing through the first hole;
- the screw being threadably connected to the threaded portion.
28 more elements
A gripper assembly for an expanding mandrel, the mandrel including expanding segments around a periphery, the gripper assembly comprising:
- a gripper segment mounted to a central arbor of the mandrel via a plurality of cups disposed in the gripper segment along a longitudinal line, each cup extending from a gripper outer surface towards a mandrel centerline;
- a plurality of threaded sleeves engaging threaded holes in the arbor corresponding to the plurality of cups, each threaded sleeve capturing a spherically domed pivot within an pocket in the central arbor underneath the threaded sleeve, the domed pivot being seated in a circular cavity in the threaded sleeve;
- a plurality of fasteners, each fastener extending through a respective cup and threaded sleeve to connect to a respective pivot;
- a plurality of restoring-force components, each restoring-force component captured between a respective fastener and cup, each restoring-force component biasing the respective cup and the gripper towards the respective threaded sleeve;
- and
- wherein the expanding segments move between an extended and a collapsed position, at least one expanding segment in the extended position clamping a free end of strip stock between the expanding segment and the gripper, and the gripper being enabled to shift via compression of the restoring-force component with respect to the arbor to accommodate the clamped free end.
3 more elements
An expanding mandrel comprising:
- a central arbor;
- a plurality of expanding segments forming a portion of an outer periphery of the mandrel, the expanding segments moving between an extended position along a larger diameter of the mandrel and a collapsed position along a smaller diameter of the mandrel;
- a gripper segment forming a remaining portion of the outer periphery along the larger diameter;
- a plurality of threaded sleeves set into the gripper segment, each threaded sleeve engaging threaded holes in the arbor, each threaded sleeve capturing a spherically domed pivot within a pocket underneath the threaded sleeve, the domed pivot being seated in a circular hole through the threaded sleeve;
- a plurality of fasteners, each fastener extending through a respective cup and threaded sleeve to connect to a respective pivot;
- a plurality of restoring-force components, each restoring-force component captured between a respective fastener and cup, each restoring-force component biasing the respective cup and the gripper towards the respective threaded sleeve;
- and
- wherein the expanding segments move between an extended and a collapsed position, at least one expanding segment in the extended position clamping a free end of strip stock between the expanding segment and the gripper segment, and the gripper segment pivoting on the plurality of pivots to accommodate the clamped free end.
5 more elements
Dependencies are inferred from the claim text.