US 12,485,499 B2
System and methods for improved sheet metal cutting
Eric Pfaff, Bethesda, MD (US); and Ronald K. Worth, Deerfield, IL (US)
Assigned to Worth-Pfaff Innovations, Incorporated, Deerfield, IL (US)
Filed by Worth-Pfaff Innovations, Incorporated, Deerfield, IL (US)
Filed on Jan. 9, 2024, as Appl. No. 18/408,378.
Application 18/408,378 is a continuation of application No. 17/380,492, filed on Jul. 20, 2021, granted, now 11,883,895.
Application 17/380,492 is a continuation of application No. 16/356,407, filed on Mar. 18, 2019, granted, now 11,084,117, issued on Aug. 10, 2021.
Application 16/356,407 is a continuation of application No. 15/345,208, filed on Nov. 7, 2016, granted, now 10,259,070, issued on Apr. 16, 2019.
Claims priority of provisional application 62/252,272, filed on Nov. 6, 2015.
Prior Publication US 2024/0227056 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G05B 19/19 (2006.01); B23K 10/00 (2006.01); B23K 26/06 (2014.01); B23K 26/08 (2014.01); B23K 26/38 (2014.01); B23K 37/02 (2006.01)
CPC B23K 10/006 (2013.01) [B23K 10/00 (2013.01); B23K 26/0626 (2013.01); B23K 26/0876 (2013.01); B23K 26/38 (2013.01); B23K 37/0235 (2013.01); G05B 19/19 (2013.01); G05B 2219/49111 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for cutting a corner of a piece of material using a CNC machine coupled to a CAD/CAM system, comprising the steps of:
a. obtaining a CAD information from the CAD/CAM system, said CAD information pertaining to a design of the material to be cut, said design comprising at least one corner, said at least one corner to be cut using a minimal rounded loop;
b. for the at least one corner, using the CAD information from the CAD/CAM system to determining a minimum linear extension length that allows the CNC machine to decelerate to a feedrate for an arc motion, wherein the arc motion has a smallest possible radius and a corresponding minimal rounded loop based on a machine acceleration limits, thereby cutting said at least one corner using the minimal rounded loop in order to eliminate unwanted dross, sharpen corners and reduce material loss;
wherein calculating the minimal rounded loop comprises the steps of:
c. calculating a duration of the extension move;
d. calculating an arc motion feedrate; and
e. calculating a linear extension length.