# US 10,766,114 B2 · Method and system for grinding the exterior of shaft parts between tips > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,766,114 B2 - Document ID: US10766114B2 - Status: Granted - Kind: B2 - Application number: 15/564,684 - Filed: 2016-04-08 - Published: 2018-03-29 - Granted: 2020-09-08 - Earliest claimed: 2015-04-13 - Assignees: Erwin Junker Grinding Technology A.S. - Applicants: Erwin Junker Grinding Technology A.S. - Inventors: Erwin Junker - Web page: https://patentgrep.com/patent/US10766114B2 ## CPC - B24B 5/04: for grinding cylindrical surfaces externally (grinding combined cylindrical and conical surfaces B24B5/14) - B24B 5/01: for combined grinding of surfaces of revolution and of adjacent plane surfaces on work - B24B 5/22: for grinding cylindrical surfaces, e.g. on bolts - B24B 41/067: {radially supporting workpieces} - B24B 49/04: involving measurement of the workpiece at the place of grinding during grinding operation - 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 ## Abstract A system and method for grinding the exterior of a shaft part with rotationally symmetrical sections and bases which have centering bores and which define a reference longitudinal axis and rotational axis of the shaft part. The shaft part is held between tips which engage into the centering bores during the grinding process using a grinding disk, and the shaft part is additionally supported on the rotationally symmetrical sections by means of a support device. The current diameter values of the rotationally symmetrical sections are measured and transmitted to a controller, by means of which the support device is updated with respect to the measured diameter values while continuously supporting the rotationally symmetrical sections until target dimensions are achieved. ## Claims ### Claim 1 A method for grinding the exterior of a shaft part with rotationally symmetrical sections and end surfaces into which centering bores have been introduced, which bores define a reference longitudinal axis and rotational axis of the shaft part, wherein during grinding, up to the end of finishing grinding by means of a grinding disk, the shaft part is held between tips that engage into the centering bores, and supported on the rotationally symmetrical sections by means of a support device with a first and a second support unit, wherein the shaft part is disposed between the grinding disk and a first support unit of the support device, and a measurement device is an in-process measurement device and measures diameter values of the rotationally symmetrical sections of the shaft part, transmits these measurement values to a controller, and this controller, on the basis of these measurement values, actively updates setting of the grinding disk with respect to the measured diameter values, and updates the support device, continuously supporting the rotationally symmetrical sections, all the way to the finished dimension of the shaft part, wherein the support device, as the first support unit, has a support disk or a contact ruler, and the second support unit has a contact ruler being configured as a support rail having separate support regions and is set against the shaft part by two drives, each CNC-controlled. ### Claim 2 (depends on 1) The method according to claim 1, wherein the shaft part is rotationally driven. ### Claim 3 (depends on 1) The method according to claim 1, wherein the support disk and the shaft part essentially run without slip relative to one another. ### Claim 4 (depends on 1) The method according to claim 1, wherein the grinding disk, the shaft part, and the support disk are regulated with regard to their respective speed of rotation. ### Claim 5 (depends on 1) The method according to claim 1, wherein the shaft part is driven/braked during finishing grinding, by means of the grinding disk and the support disk. ### Claim 6 (depends on 1) The method according to claim 1, wherein the support disk is configured with a coating in the manner of a grinding disk. ### Claim 7 (depends on 1) The method according to claim 1, wherein measuring of the diameter values takes place by means of at least two measurement devices. ### Claim 8 (depends on 1) The method according to claim 1, wherein the support device has two contact rulers, which are adjusted relative to one another and are configured in the form of a prism. ### Claim 9 (depends on 1) The method according to claim 1, wherein the grinding disk and the shaft part are moved axially relative to one another, and in this regard, the shaft part is ground on the rotationally symmetrical section, on a planar side, at least partially parallel in terms of time. ### Claim 10 (depends on 1) The method according to claim 1, wherein the support disk is configured as a regulation disk, and the rotationally driven shaft part run essentially without slip relative to one another, wherein the grinding disk, the shaft part, and the regulation disk are regulated in terms of their speed of rotation. ### Claim 11 (depends on 10) The method according to claim 10, wherein the shaft part is driven during finishing grinding by means of the grinding disk and the regulation disk, wherein the grinding disk and the regulation disk form a grinding gap in which the shaft part is disposed, supported on the support rail. ### Claim 12 (depends on 1) The method according to claim 1, wherein two support rails are adjusted relative to one another and form a prism as the support device that is updated with respect to the respective current ground diameter. ### Claim 13 A system composed of a grinding machine and a shaft part, for grinding the exterior of the shaft part, with rotationally symmetrical sections and end surfaces with centering bores introduced into them, which bores define a reference longitudinal axis and rotational axis of the shaft part, with a grinding disk that is disposed on a grinding spindle and is rotationally driven by way of a CNC axle, with a workpiece headstock having a first tip, and a tailstock having a second tip, wherein the shaft part is driven so as to rotate, by means of the first and second tip, during grinding, about a reference longitudinal axis defined in this way, and permanently held, wherein a support device having a first and a second support unit, which are adjustable relative to one another, and a measurement device are provided, by means of which measurement signals of the current diameter of the rotationally symmetrical section of the shaft part can be passed on to a controller, and on the basis of which the first and the second support unit can constantly be updated with respect to the current diameter of the rotationally symmetrical section, all the way to the finished dimension, in such a manner that the shaft part is doubly supported by means of the support units that lie opposite the grinding disk, and by means of the tips that are constantly in engagement, wherein the first support unit is a support disk or a contact ruler, and the second support unit is a contact ruler being configured as a support rail having separate support regions and is set against the shaft part by two drives, each CNC-controlled. ### Claim 14 (depends on 13) The system according to claim 13, wherein the grinding disk, the support disk, and the shaft part can each be regulated in terms of their speed of rotation, with CNC control. ### Claim 15 (depends on 13) The system according to claim 13, wherein the support disk sits on a spindle and is divided, and that each part can be updated with respect to the current diameter of corresponding rotationally symmetrical sections of the shaft part, supporting these sections. ### Claim 16 (depends on 13) The system according to claim 13, wherein the first support unit is a contact ruler, and the second support unit is a further contact ruler, which can be moved relative to the contact ruler, forming a prism-like support region on the rotationally symmetrical section of the shaft part. ### Claim 17 (depends on 13) The system according to claim 13, wherein the measurement device is an in-process measurement device. ### Claim 18 (depends on 13) The system according to claim 13, wherein drivers are present on the workpiece headstock, by means of which drivers the shaft part can be rotationally driven, and which can be released from engagement on the shaft part.