Self-adjusting chamfering tool
AssigneeNoga Engineering & Technology (2008) Ltd.
InventorRami Glaser
Life of this patent
Estimating the term…
Abstract
A self-adjusting tool for chamfering an end of a cylinder includes a plurality of legs. A distal segment of each of the legs extends in a forward direction of the tool and is placeable about the end of the cylinder. A central body has a rotatable shaft and a mechanism that is operable by rotation of the shaft about a shaft axis. The mechanism is operable to retract the legs inward in tandem toward the cylinder and to rotate the legs about the shaft axis when further retraction of the legs is blocked by contact with the cylinder. One or a plurality of chamfering blades are each attached to one of the legs. A cutting edge of each blade is oriented diagonally forward and inward.
Claims12
A self-adjusting tool for chamfering an end of a cylinder, the tool comprising:
- at least three legs, a distal segment of each of the legs extending in a forward direction of the tool and placeable about the end of the cylinder, each of the legs including an indentation and a linearly translatable rack comprising teeth;
- a central body with a rotatable shaft and a mechanism that includes central gear that is mounted on and is rotatable with the shaft, the central gear comprising teeth that are configured to engage the teeth on the linearly translatable rack on each of the legs such that rotation of the shaft about a shaft axis linearly translates each leg of said at least three legs to retract said at least three legs inward in tandem toward the cylinder,
- wherein the indentation on each leg of said at least three legs is configured to enable retraction of another leg of said at least three legs without interference and wherein the mechanism is configured to rotate said at least three legs about the shaft axis when further retraction of said at least three legs is blocked by contact with the cylinder;
- and
- one or a plurality of chamfering blades, each chamfering blade being attached to a leg of said at least three legs, a cutting edge of each blade being oriented diagonally forward and inward.
A method for chamfering an end of a cylinder, the method comprising:
- positioning forward-extending distal segments of a plurality of legs of a chamfering tool around the end of the cylinder, said plurality of legs comprising at least three legs, each of the legs including an indentation and a linearly translatable rack comprising teeth;
- rotating a shaft in a central body of the chamfering tool to rotate a central gear that is mounted on and is rotatable with the shaft and that comprises teeth, such that the teeth of the central gear engage the teeth on the linearly translatable rack on each of the legs, so as to linearly translate each leg of said plurality of legs to retract said plurality of legs inward in tandem toward the cylinder until further retraction is blocked by contact of the distal segments with the cylinder;
- after the further retraction is blocked, continuing to rotate the shaft to cause said plurality of legs to rotate around an axis of the shaft so as to cause the distal segments that are in contact with the cylinder to move along the cylinder, wherein the indentation on each leg of said at least three legs is configured to enable retraction of another leg of said at least three legs without interference;
- and
- moving the chamfering tool toward the end of the cylinder concurrently with the rotating of the shaft to draw a cutting edge of a chamfering blade along an edge at the end of the cylinder to chamfer the cylinder, the chamfering blade being attached to a leg of said plurality of legs and the cutting edge being oriented diagonally forward and inward.
Dependencies are inferred from the claim text.