US 12,459,051 B2
Devices, systems, and methods for increased wear resistance during low temperature friction stir processing
Rodney Dale Fleck, Draper, UT (US); and Russell J. Steel, Salem, UT (US)
Assigned to Mazak Corporation, Florence, KY (US)
Filed by Mazak Corporation, Florence, KY (US)
Filed on Oct. 3, 2022, as Appl. No. 17/958,947.
Application 17/958,947 is a continuation of application No. 16/115,195, filed on Aug. 28, 2018, granted, now 11,458,564.
Claims priority of provisional application 62/552,769, filed on Aug. 31, 2017.
Prior Publication US 2023/0107348 A1, Apr. 6, 2023
Int. Cl. B23K 20/12 (2006.01); B23K 20/233 (2006.01); B23K 103/10 (2006.01)
CPC B23K 20/127 (2013.01) [B23K 20/1255 (2013.01); B23K 20/129 (2013.01); B23K 20/2333 (2013.01); B23K 20/125 (2013.01); B23K 2103/10 (2018.08)] 17 Claims
OG exemplary drawing
 
1. A friction stir processing tool rotatable around a central rotational axis, the friction stir processing tool comprising:
a single body monolithically formed of polycrystalline diamond;
a shoulder of the single body extending transverse to the central rotational axis;
a lower pin of the single body extending downwardly from the shoulder;
the lower pin having a lowermost end and a side surface extending around the pin;
a discontinuity in the side surface of the lower pin;
a working surface of the shoulder extending around the lower pin;
an arcuate ridge extending downwardly from the working surface of the shoulder and extending less than 360 degrees around the lower pin, the arcuate ridge having opposite ends with a spacing therebetween;
the discontinuity in the side surface of the lower pin facing radially outward toward the spacing in a radial direction between the opposite ends of the arcuate ridge;
an upper surface portion of the single body opposite the lower pin, the upper surface portion extending transverse to the central rotational axis;
the single body having a total length extending along the central rotational axis from the lowermost end of the lower pin to the upper surface portion of the single body; and
the polycrystalline diamond extends the total length of the single body tool.