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1. (WO1979000004) EDGE FOLLOWERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1979/000004 International Application No.: PCT/GB1978/000004
Publication Date: 11.01.1979 International Filing Date: 16.06.1978
IPC:
B23K 9/127 (2006.01) ,B23Q 35/128 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
K
SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
9
Arc welding or cutting
12
Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
127
Means for tracking lines during arc welding or cutting
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
35
Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
04
using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
08
Means for transforming movement of the feeler or the like into feed movement of tool or work
12
involving electrical means
127
using non-mechanical sensing
128
Sensing by using optical means
Applicants:
Inventors:
Priority Data:
25270/7716.06.1977GB
Title (EN) EDGE FOLLOWERS
(FR) DISPOSITIF DE COPIAGE
Abstract:
(EN) An edge follower for sensing and following a selected edge (24) a workpiece (2) so as to control the path of a metal working tool such as a welding torch (12) includes a light source for illuminating a small area of the workpiece (2) and a photocell for generating a signal corresponding to the amount of light entering the cell after reflection from the workpiece. Means in the forms of a synchronous stepping motor and a carriage (16) is provided to move the light source and photocell incrementally transversely to the edge (24) being followed in accordance with the amplitude of the signal from the photocell to keep the signal at a predetermined level.
(FR) Dispositif de copiage permettant de palper et de suivre un bord determine (24) d"une piece (2) pour determiner le trajet d"un outil de travail des metaux tel qu"une torche de soudage (12) qui comprend une source de lumiere eclairant une surface reduite de la piece (2) et une cellule photoelectrique produisant un signal qui correspond a la quantite de lumiere penetrant dans la cellule apres reflection sur la piece (2). Des moyens consistant en un moteur synchrone pas a pas et un chariot (16) sont prevus pour deplacer la source de lumiere et la cellule photoelectrique transversalement et par increments par rapport au bord (24) suivi, en fonction de l"amplitude du signal produit par la cellule photoelectrique, de facon a conserver ce signal a un niveau predetermine.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)