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1. (WO2019048833) NON-CONTACT OPTICAL TOOL LENGTH MEASURING APPARATUS AND METHOD
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Pub. No.: WO/2019/048833 International Application No.: PCT/GB2018/052473
Publication Date: 14.03.2019 International Filing Date: 31.08.2018
IPC:
B23Q 17/24 (2006.01) ,G01B 11/08 (2006.01) ,G01B 11/24 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
Q
DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL, CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
17
Arrangements for indicating or measuring on machine tools
24
using optics
G PHYSICS
01
MEASURING; TESTING
B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11
Measuring arrangements characterised by the use of optical means
08
for measuring diameters
G PHYSICS
01
MEASURING; TESTING
B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
11
Measuring arrangements characterised by the use of optical means
24
for measuring contours or curvatures
Applicants:
RENISHAW PLC [GB/GB]; New Mills Wotton-under-Edge Gloucestershire GL12 8JR, GB
Inventors:
MERRIFIELD, Benjamin, Jason; GB
EGGLESTONE, Edward, Benjamin; GB
HOLLOWAY, Alan, James; GB
Agent:
DUNN, Paul, Edward; GB
ROLFE, Edward, William; GB
MATTHEWS, Paul; GB
BREWER, Michael, Robert; GB
Priority Data:
17189506.305.09.2017EP
Title (EN) NON-CONTACT OPTICAL TOOL LENGTH MEASURING APPARATUS AND METHOD
(FR) APPAREIL ET PROCÉDÉ DE MESURE OPTIQUE SANS CONTACT DE LONGUEUR D'OUTIL
Abstract:
(EN) A method for tool measurement using a non-contact tool setting apparatus mounted to a machine tool. The non-contact tool setting apparatus comprises a transmitter (10) for emitting a light beam (12;80) having a beam width and a receiver(14)for receiving the light beam(12). The receiver (14) generates a beam intensity signal describing the intensity of received light. The method is for measuring a tool (84) having a nominal tool diameter less than the beam width such that fully inserting the tool(84)feature into the light beam (80) would only partially occlude the light beam(80). The method comprises moving the tool through the light beam (12;80) thereby causing a change in the beam intensity signal and generating a trigger signal when the beam intensity signal crosses a trigger threshold. A size of the tool(84) is derived using the trigger signal generated. The method also comprises a step of applying a tool length correction (e.g. a change to the trigger threshold, trigger delay etc) that accounts for the nominal tool diameter of the tool (84)being less than the beam width.
(FR) La présente invention concerne un procédé de mesure d'outil à l'aide d'un appareil de réglage d'outil sans contact monté sur une machine-outil. L'appareil de réglage d'outil sans contact comprend un émetteur (10) pour émettre un faisceau de lumière (12 ; 80) ayant une largeur de faisceau et un récepteur (14) pour recevoir le faisceau de lumière (12). Le récepteur (14) génère un signal d'intensité de faisceau décrivant l'intensité de la lumière reçue. Le procédé consiste à mesurer un outil (84) ayant un diamètre d'outil nominal inférieur à la largeur de faisceau de telle sorte que l'insertion complète de l'élément d'outil (84) dans le faisceau de lumière (80) n'occulte que partiellement le faisceau de lumière (80). Le procédé consiste à déplacer l'outil à travers le faisceau de lumière (12 ; 80), pour provoquer ainsi un changement dans le signal d'intensité de faisceau et générer un signal de déclenchement lorsque le signal d'intensité de faisceau franchit un seuil de déclenchement. Une taille de l'outil (84) est dérivée à l'aide du signal de déclenchement généré. Le procédé comprend également une étape consistant à appliquer une correction de longueur d'outil (par exemple un changement du seuil de déclenchement, un retard de déclenchement, etc.) qui tient compte du diamètre d'outil nominal de l'outil (84) qui est inférieur à la largeur de faisceau.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)