Abstract:
A magnetic clamping arrangement (10) for holding the arrangement, and in particular a body (5), operably clamped with respect to a ferromagnetic surface (6) by way of a body datum face (8), comprises housing means (12) mounted on the body, and electromagnet (16) carried by the housing means. The electromagnet comprises a core (18), having three limbs 20.1, 20.2 and 20.3, each terminating in a pole face 22.1, 22.2 and 22.3, being formed by a plurality of ferromagnetic transformer laminations (26), stacked together and slideable with respect to each other in a direction to and from the pole faces. Lamination bias means (36), in the form of masses 38, 40.1 and 40.2 of resilient compressible material, defined quiescent pole faces from which individual laminations may depart by sliding when forced against a surface having ridges and/or grooves extending in the lamination planes, but exerts a restoring force on such laminations so displaced. The pole faces are thus able to conform to such an uneven surface before the electromagnet is energised and attach with improved flux coupling thereafter. The housing means is mounted on the body by way of attachment means (44) which biases the core to a position recessed with respect to the datum face. Bias override, provided by handle (50), permits the quiescent core pole pieces to be exposed for forcing into conformity with the ferromagnetic surface and when flux coupling is established the attachment bias urges the body (5) against the surface.
Abstract:
The device contains a plate (4) for positioning the parts (14), which is made as a solid piece of a ferromagnetic material, and units for excitation of the magnetic field. One unit contains cores (2) mounted on a base (1) and embraced by coils (3) of a direct current winding. The other unit consists of W-shaped magnetic circuits, each of them being located within a zone of contact of the plate (4) with the core (2) and symmetrically in relation to its longitudinal axis so that a part of it is placed inside the body of the plate (4) and the other part - inside the core (2). The magnetic circuits are isolated from the cores (2) by means of liners (13) of a non-magnetic material.
Abstract:
The present invention relates to an Electro Permanent Magnetic work holding system having additional solenoid(s) positioned within the main pole(s) of the working face. Conventional double magnet EPM work holding systems for ferromagnetic work pieces suffer from unsatisfactory control of flux affecting working operations and incidence of residual magnetism in work pieces. The present invention aims at overcoming these difficulties and provides an Electro Permanent work holding system characterized in that the said system comprises a work holding face (1), a base plate (2), a set of reversible magnets (5), solenoid(s) for controlling reversible magnets (3), main pole(s) (4) positioned above the reversible magnets, a set of non-reversible permanent magnets (6), set of additional solenoid(s) (7) within the main poles of the working surface and magnetic insulator (8). These set of additional solenoids positioned within the main poles of the working facilitates better control of flux for proper holding and also demagnetization of the work piece as and when needled.
Abstract:
The invention relates to an attaching device (10), an arrangement and a method for attaching an object to be worked to a working base. The attaching device comprises: - a first holding means, i.e. a first magnet (8), in the first end of the attaching device (10), for attaching the attaching device (10) to the working base or to another attaching device or to the object to be worked; - a second holding means, i.e. second magnet (1 ), in the second end of the attaching device (10), for attaching the attaching device (10) to the working base or to another attaching device or to the object to be worked; - control means for controlling the holding forces produced by the first and second holding means, such as magnets.
Abstract:
There is disclosed coin billet or coining die holder (108) for a robotic arm of a polishing machine for polishing a coining die or coin billet. The holder comprises a base (114); a magnetic retainer (122) which is arranged to magnetically retain a billet or die to the base; and a supporting sidewall (128)extending away from the base in an axial direction. The supporting sidewall is arranged to at least partially surround the outer surface of a billet or die retained to the base by the magnetic retainer so as to restrict lateral movement of the billet or die with respect to the base.
Abstract:
The present invention refers to a magnetic device for clamping ferromagnetic workpieces comprising a frame (2) having a first magnetic circuit (3) configured to generate a first magnetic field adapted to clamp a ferromagnetic workpiece to be processed; a second magnetic circuit (4) configured to generate a second magnetic field adapted to clamp said ferromagnetic workpiece (1) to a machine tool bed; said first magnetic circuit (3) and said second magnetic circuit (4) being adapted to be controlled to turn on and/off independently one from the other. The modular magnetic device is characterized in that it comprises first (6, 10) and second (5, 11) mechanical and electrical connection means for mechanically and electrically connecting said magnetic device, when in operation, to corresponding second and first complementary mechanical and electrical connection means of other modular magnetic devices located adjacent thereto, to create a series of modular magnetic devices mechanically and electrically connected together.
Abstract:
본 발명에 따른 마그네틱 척은, 베이스와, 상기 베이스 상에 배열된 복수의 마그네틱 블록을 포함하는 마그네틱 스테이지; 및 상기 마그네틱 블록의 상부에 배치되어 가공대상물을 지지하고, 상기 마그네틱 스테이지에 결합된 상태에서 적어도 일 방향으로 슬라이딩 이동 가능하게 마련되는 적어도 하나의 슬라이딩용 확장 블록을 포함한다.
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).