Abstract:
Magnetic table jig assemblies and methods allow workpieces (e.g., aircraft components to be fabricated) on a table top of the table jig assembly to be accurately indexed relative to a robotically operated tool (e.g., a robotically operated drill). The magnetic table jig assembly may include a wheeled frame which is capable of rolling movement across a floor surface, a horizontally planar table top exhibiting ferromagnetic properties supported by the frame and a plurality of magnetic workpiece positioners each including an actuator to magnetically couple and decouple the magnetic workpiece positioner to the table top. The workpiece will therefore be positioning restrained on the table top by magnetically coupling the plurality of the magnetic workpiece positioners to the table top in abutting relationship to a perimetrical edge of the workpiece.
Abstract:
Die Erfindung betrifft eine Magnetspannvorrichtung mit einer Spannfläche, wenigstens einem elektromagnetischen Spannmittel zum Aufspannen eines Werkstückes in der Spannfläche und einer Zentriervorrichtung zum Zentrieren des Werkstückes, wobei die Zentriervorrichtung wenigstens eine in der Spannfläche verschiebbare Grundspannbacke aufweist, wobei der wenigstens einen Grundspannbacke eine bezüglich der Spannfläche in eine abgesenkte oder angehobene Position bewegbare Spannbacke zugeordnet ist sowie ein Verfahren zum Zentrieren eines Werkstückes.
Abstract:
The present invention relates to a magnetic apparatus for clamping ferromagnetic workpieces, comprising a first magnetic clamping plate (2) with a first magnetic circuit therein for generating a first magnetic flux when said first magnetic circuit is on, to define a magnetically active portion of said first magnetic plate (2), acting as a magnetic clamping surface (2D). The present invention is characterized in that the apparatus further comprises a spacer (3) extending in a predetermined direction of extension (Y-Y), a second magnetic clamping plate (4) with a second magnetic circuit therein for generating a second magnetic flux when said second magnetic circuit is on, to define a magnetically active portion of said second magnetic plate (4), acting as a magnetic clamping surface (4D), said spacer (3) being interposed between said first magnetic plate (2) and said second magnetic plate (4), said spacer (3), said first magnetic plate (2) and said second magnetic plate (4) being rigidly and integrally connected together, wherein the first magnetic flux generated- by said first circuit is higher than the second magnetic flux generated by said second magnetic circuit, with the clamping surfaces (2D, 4D) defined in said first magnetic plate (2) and said second magnetic plate (4) having the same area.
Abstract:
The present invention relates to a movable pole extension (4) for a magnetic clamping apparatus (1) for holding a ferromagnetic workpiece (P), comprising a fixed pole member (5) extending in a predetermined longitudinal direction (X-X) and at least two pole members (6, 7) attached to said fixed pole member (5), said at least two pole members (6, 7) being movable relative to said fixed pole member (5). The movable pole extension is characterized in that it has holder means (8) operably coupled to said fixed pole member (5), wherein said holder means (8) are movable in said predetermined longitudinal direction (X-X) between a first operating position (Pl) and a second operating position (P2) and operate on said at least two movable pole members (6, 7) to hold them in coupled contact with said fixed pole member (5).
Abstract:
Die Erfindung betrifft eine magnetische Spannvorrichtung insbesondere für zylindrische bzw. ringförmige Werkstücke (08) aus magnetisierbaren Werkstoffen mit einer kreisförmigen Trägerplatte (01) mit radialer Anordnung abwechselnd polarisierter Magnetpole (02). Die magnetische Spannvorrichtung zeichnet sich dadurch aus, dass die Magnetpole (02) drei gleich großen Segmentbereichen (03) zugeordnet sind, welche symmetrisch auf der Trägerplatte (01) angeordnet sind, wobei die Segmentbereiche (03) voneinander beabstandet sind und sich dadurch zwischen benachbarten Segmentbereichen (03) jeweils ein magnetisch inaktiver Bereich befindet (04). Innerhalb dieser magnetisch inaktiven Bereiche (04) befinden sich Aussparungen (05) zur Aufnahme von Greifarmen (09).
Abstract:
Described herein is an electro permanent magnetic work holding system which simultaneously senses displacement using its electrical winding(s) as search coil(s). Conventional Electro Permanent Magnetic work holding system could not detect displacement of work piece(s) on its own, which affected working operations and consequently accuracy of work. In an attempt to overcome this difficulty extraneous sensor(s) had been provided to detect displacement during work holding. The present invention aims at addressing the foregoing difficulties, which relates to a system for holding ferromagnetic work piece(s) (6) magnetically and simultaneously sensing any displacement thereof, which comprises an electro permanent magnetic work holder (1) having a plurality of reversible magnet(s) (2) placed thereon and a controller (5) to deliver power to electrical winding(s) (3), characterized in that the electrical winding(s) have adequate number of turns which after magnetization acts as search coil(s) and is connected to displacement monitor circuit provided in the controller (5) for analysis and comparison of the induced signal due to change in magnetic lines of force (7) and generates an error signal output in the event of displacement of the work piece(s) (6).
Abstract:
A magnetic pallet (1) for anchorage of a ferromagnetic part to be taken for machining to a machine tool with horizontal tool axis, said magnetic pallet (1) comprising a base plate (3), a vertical parallelepiped shoulder (5) extending from the base plate (3), a first plurality of magnetic conductors (15) arranged in a matrix and which can be polarised magnetically so as to define a first surface for vertical magnetic anchorage of ferrous parts at a first lateral face (4) of said shoulder (5), characterised in that said base plate (3) and said shoulder (5) are formed from a single ferromagnetic monolithic block, and in that from said ferromagnetic monolithic block, at said first lateral face (4) of said shoulder (5), a first recess (7) is formed for housing said first plurality of magnetic conductors (15).
Abstract:
A device for magnetic fixation of parts worked on a machine-tool comprises a source (3, 4) of magnetic field and a plate (5) placed thereon and provided, on its side which serves for positioning the worked parts (1), with slots (6) intended for splitting the poles. The plate (5) on its side facing the source (3, 4) of the magnetic field is provided with additional slots (7) shifted in relation to the slots (6) so that the distance (b) from the bottom of the slot (6) to the surface of the plate (5) facing the source (3, 4) of the magnetic field, the distance (a) between the slot (6) and the additional slot (7) and the overlapping distance (c) of the slot (6) and the additional slot (7) are equal to each other.
Abstract:
An electro permanent magnetic work holding system with variable magnetic pole configuration (5), comprising a work holding face(l) located on a base plate (2) carrying electrical winding (3) with magnetic poles (4), below which are placed permanent magnets (5), the said system being characterized in that the said magnetic poles are deployed in square pole, long pole or cross pole configuration or arrangement, there allowing handling of work pieces varying dimensions with a greater degree of attachment with the said work holding face (1).
Abstract:
A magnetic holding device uses an array of switchable magnets. A carrier holds the array of switchable magnets to form a working surface. Each switchable magnet has a coil of wire surrounding a magnetizable core element. The array is arranged in groups of magnets. A circuit is coupled to the coils to selectively magnetize and demagnetize each group of switchable magnets to selectively independently place each group into one of these states: an ON state that configures the selected group to have a first magnetic polarity at the working surface, an ON state that configures the selected group to have an opposite magnetic polarity at the working surface, and an OFF state that configures the magnets in the selected group to have no magnetism at the working surface. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.