Donald E Krintzline

7634934, Dec 22, 2009

May 20, 2008

12/123488

Donald E. Krintzline - Tiffin OH, US
Mark W. Bordner - Attica OH, US

National Machinery LLC - Tiffin OH

B21D 22/00

723532, 723548

A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.

7712221, May 11, 2010

May 20, 2008

12/123485

Donald E. Krintzline - Tiffin OH, US
Mark W. Bordner - Attica OH, US

National Machinery LLC - Tiffin OH

B21K 1/02

29898068, 723542, 723548, 384565, 384568

A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.

7784318, Aug 31, 2010

Mar 27, 2008

12/056453

Donald E. Krintzline - Tiffin OH, US
Laurence W. Kelbley - Tiffin OH, US
Thomas E. Hay - Tiffin OH, US

National Machinery LLC - Tiffin OH

B30B 15/14
B21D 55/00
B21B 37/00
B21D 43/05
B21J 13/10

72 213, 72 189, 72 194, 72 214, 72 3111, 72441, 72446, 724525, 100282, 100283

A method and apparatus for detecting a turned blank at a workstation in a progressive forging machine comprising simultaneously monitoring both the force on a tool in the workstation and the crank angle of the machine, determining a reference crank angle when the tool is subjected to a force at the workstation about to deliver a blow and a blank in the workstation is properly angularly aligned, operating the machine to forge blanks in a normal manner when a force on the tool at the workstation occurs substantially at the reference crank angle, and interrupting said normal manner when the force on the tool at the workstation occurs before said reference crankshaft angle to enable the blank being formed at the workstation to be separated from remaining blanks being forged in the machine.

7377042, May 27, 2008

Jul 13, 2004

10/890339

Donald E. Krintzline - Tiffin OH, US
Mark W. Bordner - Attica OH, US

National Machinery LLC - Tiffin OH

B21K 1/02

29898068, 723542, 723546, 723548, 384565, 384568

A machine, method and tooling to precision cold-form roller blanks for anti-friction bearings. The machine is a multistage progressive former using floating die cavities to enable simultaneous shaping of the ends of the roller with high accuracy and without flash. The tools and staged forming create an improved roller with an advantageous grain pattern and devoid of structural defects previously attributable to the presence of sheared end face material in the radiused corners of the blank and flash at its mid-section.

20110061434, Mar 17, 2011

Sep 17, 2009

12/561767

Donald E. Krintzline - Tiffin OH, US
Thomas E. Hay - Tiffin OH, US

NATIONAL MACHINERY LLC - Tiffin OH

B21D 39/20

72 60

A set of tooling for a progressive forming machine comprising die and tool units having internal complementary cavity portions for receiving a workpiece, one of said units being arranged to slide a limited distance along its axis and to be biased by a spring force towards the other unit when the units are mounted in the forming machine, the units each having an end face with a smooth surface finish adapted to press against the smooth surface finish of the end face of the other unit, the end face area of one of the units being relatively small compared to its major cross-sectional area whereby a high contact pressure between the end faces is obtained for a given spring bias force such that extrusion/cooling oil coating a workpiece received in the cavity portions is restrained from leakage from the cavity portions across said end faces during a hydrostatic trapped extrusion of the workpiece in the die and tool units whereby the die and tool units are capable of shaping the workpiece to a degree beyond limits of conventional cold-forming processes.

20140345355, Nov 27, 2014

Aug 12, 2014

14/457426

- Tiffin OH, US
Donald E. Krintzline - Tiffin OH, US

B21C 1/32
B21C 25/02
B21C 9/00

72286

A set of tooling for a progressive forming machine comprising die and tool units having internal complementary cavity portions for receiving a workpiece, one of said units being arranged to slide a limited distance along its axis and to be biased by a spring force towards the other unit when the units are mounted in the forming machine, the units each having an end face with a smooth surface finish adapted to press against the smooth surface finish of the end face of the other unit, the end face area of one of the units being relatively small compared to its major cross-sectional area whereby a high contact pressure between the end faces is obtained for a given spring bias force such that extrusion/cooling oil coating a workpiece received in the cavity portions is restrained from leakage from the cavity portions across said end faces during a hydrostatic trapped extrusion of the workpiece in the die and tool units whereby the die and tool units are capable of shaping the workpiece to a degree beyond limits of conventional cold-forming processes.