# US 2014/0194038 A1 · Deburring machine and method for deburring > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194038 A1 - Document ID: US20140194038A1 - Status: Published application - Kind: A1 - Application number: 13/734,265 - Filed: 2013-01-04 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: White Drive Products, Inc. - Applicants: White Drive Products, Inc. - Inventors: Gary Dean Lowe - Web page: https://patentgrep.com/patent/US20140194038A1 ## CPC - B24B 9/04: of metal, e.g. skate blades {(B24B3/003 takes precedence)} - B24B 7/17: for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders - B24B 27/0069: {with means for feeding the work-pieces to the grinding tool, e.g. turntables, transfer means (see also B24B27/0023, B24B7/16)} - B24B 27/0076: {grinding machines comprising two or more grinding tools} - B24B 29/005: {using brushes} - B24B 37/08: for double side lapping - B24B 37/28: for double side lapping of plane surfaces - B24B 41/005: {Feeding or manipulating devices specially adapted to grinding machines (feeding, loading or unloading work specially adapted to lapping machines B24B37/345)} - B24B 41/067: {radially supporting workpieces} - B24D 13/145: {having a brush-like working surface} - B24B: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING (grinding of gear teeth B23F, of screw-threads B23G1/36; by electro-erosion B23H; abrasive or related blasting B24C; tools for grinding, buffing or sharpening B24D; polishing compositions C09G1/00; abrasives C09K3/14; electrolytic etching or polishing C25F3/00; grinding arrangements for use on assembled railway tracks E01B31/17); DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS - B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11) ## Abstract A method for deburring a ground metal part includes loading a ground metal part into a carrier, contacting a first planar surface of the ground metal part with a first grinding wheel, and contacting a second planar surface of the ground metal part with a second grinding wheel. The first grinding wheel is rotated in a first rotational direction. The second grinding wheel is rotated also in the first rotational direction. After the first grinding wheel is rotated in the first rotational direction, the first grinding wheel is then rotated in a second rotational direction, which is opposite to the first rotational direction. After the second grinding wheel is rotated in the first rotational direction, the second grinding wheel is also rotated in the second rotational direction. ## Claims ### Claim 1 A method for deburring a ground metal part, the method comprising: loading a ground metal part into a first circular opening in a carrier of a deburring machine, wherein the carrier also includes a second circular opening; contacting a first planar surface of the ground metal part with a first grinding wheel; contacting a second planar surface, which is opposite to and parallel with the first planar surface, of the ground metal part with a second grinding wheel; with the first grinding wheel in contact with the first planar surface, rotating the first grinding wheel in a first rotational direction about a first rotational axis, which is parallel to and offset from a first central axis of the first circular opening in the carrier; with the second grinding wheel in contact with the second planar surface, rotating the second grinding wheel in the first rotational direction about a second rotational axis, which is parallel to and offset from the first central axis; with the first grinding wheel in contact with the first planar surface, rotating the first grinding wheel in a second rotational direction, which is opposite to the first rotational direction, about the first rotational axis; with the second grinding wheel in contact with the second planar surface, rotating the second grinding wheel in the second rotational direction about the second rotational axis. ### Claim 2 (depends on 1) The method of claim 1, wherein rotating the first grinding wheel and the second grinding wheel in the first rotational direction with each grinding wheel in contact with the ground metal part results in the ground metal part rotating in the second rotational direction about the central axis with respect to the carrier. ### Claim 3 (depends on 1) The method of claim 1, wherein each grinding wheel is a brush including a plurality of bristles, each bristle extending in a direction parallel with the respective rotational axes. ### Claim 4 (depends on 3) The method of claim 3, wherein the ground metal part includes a recess extending axially into the ground metal part from the first planar surface, wherein the bristles of the brush of the first grinding wheel extend into the recess while the first grinding wheel is rotating and in contact with the first planar surface. ### Claim 5 (depends on 1) The method of claim 1, further comprising moving the first grinding wheel toward the ground metal part in a direction parallel to the first rotational axis, wherein the first grinding wheel is driven by a first motor to rotate the first grinding wheel and the second grinding wheel is driven by a second motor to rotate the second grinding wheel. ### Claim 6 (depends on 5) The method of claim 5, further comprising: measuring an amperage load of the first motor; and adjusting a location of the first grinding wheel with respect to the ground metal part in the direction parallel to the first rotational axis based on the measured amperage load. ### Claim 7 (depends on 1) The method of claim 1, wherein the first rotational axis is coaxial with the second rotational axis, and each rotational axis is generally horizontal. ### Claim 8 (depends on 7) The method of claim 7, wherein the ground metal part is circular in a cross section taken normal to the central axis and is slightly smaller in diameter than the diameter of the first circular opening in the carrier. ### Claim 9 (depends on 1) The method of claim 1, wherein rotation of the first grinding wheel and the second grinding wheel in the first direction occurs prior to rotation of the first grinding wheel and the second grinding wheel in the second direction. ### Claim 10 (depends on 9) The method of claim 9, further comprising: with the first grinding wheel in contact with the first planar surface, rotating again the first grinding wheel in the first rotational direction after rotating the first grinding wheel in the second rotational direction; and with the second grinding wheel in contact with the second planar surface, rotating again the second grinding wheel in the first rotational direction after rotating the second grinding wheel in the second rotational direction. ### Claim 11 (depends on 10) The method of claim 10, further comprising: with the first grinding wheel in contact with the first planar surface, rotating again the first grinding wheel in the second rotational direction after rotating again the first grinding wheel in the first rotational direction; with the second grinding wheel in contact with the second planar surface, rotating again the second grinding wheel in the second rotational direction after rotating again the second grinding wheel in the first rotational direction. ### Claim 12 (depends on 1) The method of claim 1, further comprising unloading another ground metal part from the carrier while contacting the first planar surface of the ground metal part with the first grinding wheel and contacting the second planar surface of the ground metal part with the second grinding wheel. ### Claim 13 (depends on 12) The method of claim 12, wherein the ground metal part is a rotor and the other ground metal part is a stator, wherein the rotor is matched to the stator and each form part of a rotor set of a gerotor motor. ### Claim 14 (depends on 1) The method of claim 1, wherein the first grinding wheel and the second wheel rotatably contact the ground metal part so that the ground metal part rotates within the first circular opening of the carrier. ### Claim 15 (depends on 14) The method of claim 14, wherein the carrier is stationary while the ground metal part rotates within the first circular opening. ### Claim 16 (depends on 1) The method of claim 1, wherein the second circular opening defines a second central axis; wherein subsequent to the step of loading the ground metal part and prior to the step of contacting the first planar surface, the carrier is rectilinearly moved along a rail of the deburring machine so that the first central axis and the second central axis remain vertically spaced from the rail a first distance and a second distance, respectively; and wherein the first distance is equal to the second distance. ### Claim 17 (depends on 16) The method of claim 16, wherein the first distance and the second distance remain constant as the carrier is moved along the rail. ### Claim 18 A method for deburring a ground metal part, the method comprising: loading a ground metal part into a circular opening in a carrier of a deburring machine; moving the carrier along a rail of the deburring machine so as to align the circular opening of the carrier with an opening in a frame plate of the deburring machine; contacting a first planar surface of the ground metal part with a first grinding wheel; extending a second grinding wheel through the opening in the frame plate so as to contact a second planar surface of the ground metal part, wherein the second planar surface is opposite to and parallel with the first planar surface; with the first grinding wheel in contact with the first planar surface, rotating the first grinding wheel in a first rotational direction about a first rotational axis, which is parallel to and offset from a central axis of the circular opening in the carrier; with the second grinding wheel in contact with the second planar surface, rotating the second grinding wheel in the first rotational direction about a second rotational axis, which is parallel to and offset from the central axis; with the first grinding wheel in contact with the first planar surface, rotating the first grinding wheel in a second rotational direction, which is opposite to the first rotational direction, about the first rotational axis; and with the second grinding wheel in contact with the second planar surface, rotating the second grinding wheel in the second rotational direction about the second rotational axis. ### Claim 19 (depends on 18) The method of claim 18, wherein the first grinding wheel and the second wheel rotatably contact the ground metal part so that the ground metal part rotates within the circular opening of the carrier. ### Claim 20 (depends on 19) The method of claim 19, wherein the carrier is stationary while the ground metal part rotates within the circular opening.