Back to results
US 9,987,722 B2Granted
Hard-rolling roller
AssigneeHegenscheidt-MFD GmbH & Co. KG
InventorsHans-Toni Steffens, Hans Zimmermann
Life of this patent
Estimating the term…
Abstract
The invention relates to a hard-rolling roller for a deep rolling tool having a torus-shaped base body for deep rolling of radiuses or recesses which limit the bearing trunnion on crankshafts on both sides, and two at least approximately truncated cone-shaped central bodies, rising on both sides of the body. A cylindrical body rises on the upper end surface of one of the two central bodies.
Claims5
A work roller for a crankshaft deep-rolling tool comprising:
- a torus-shaped base body comprising an annular working surface over an outer circumference thereof, and having an upper side and a lower side that is opposite to the upper side;
- a first, truncated, cone-shaped central body extending along a central axis from the upper side of the base body, the first central body having a first end having a first greater diameter and a second end having a first lesser diameter, the first end being adjacent to the upper side of the base body and the second end being offset from the base body by a first distance;
- a second, truncated, cone-shaped central body extending along the central axis from the lower side of the base body, the second central body having a third end having a second greater diameter and a fourth end having a second lesser diameter, the third end being adjacent to the lower side of the base body and the fourth end being offset from the base body by a second distance;
- a cylindrical body extending along the central axis from the second end of the first central body for a third distance, the cylindrical body having a diameter that is less than or equal to the first lesser diameter;
- wherein the first greater diameter is approximately the same as the second greater diameter, and the first lesser diameter is less than the second lesser diameter;
- and
- wherein the second distance is less than or equal to the first distance, the third distance is greater than or equal to the first distance.
4 more elements
A crankshaft deep-rolling tool for deep rolling the respective radiuses located between a bearing trunnion and first and second crank webs located at opposite ends of the bearing trunnion, the deep rolling tool comprising:
- a guide roller;
- a cage;
- and
- a pair of work rollers each rotatably retained in the cage;
- wherein each work roller comprises:
- a torus-shaped base body comprising an annular working surface over an outer circumference thereof, and having an upper side and a lower side that is opposite to the upper side;
- a first, truncated, cone-shaped central body extending along a central axis from the upper side of the base body, the first central body having a first end having a first greater diameter and a second end having a first lesser diameter, the first end being adjacent to the upper side of the base body and the second end being offset from the base body by a first distance;
- a second, truncated, cone-shaped central body extending along the central axis from the lower side of the base body, the second central body having a third end having a second greater diameter and a fourth end having a second lesser diameter, the third end being adjacent to the lower side of the base body and the fourth end being offset from the base body by a second distance;
- a cylindrical body extending along the central axis from the second end of the first central body for a third distance, the cylindrical body having a diameter that is less than or equal to the first lesser diameter;
- wherein the first greater diameter is approximately the same as the second greater diameter, and the first lesser diameter is less than the second lesser diameter;
- and
- wherein the second distance is less than or equal to the first distance, the third distance is greater than or equal to the first distance;
- and
- wherein, if a work roller is retained in the cage in an incorrect orientation, the cylindrical body of the work roller will interfere with a respective one of the first and second crank webs of the crankshaft.
11 more elements
Dependencies are inferred from the claim text.