A magnetic drill is provided with an alternate power source. The drill is comprises of: an electric motor for driving a tool; a controller configured to receive an AC input signal and operable to control a drive signal to the electric motor; an electromagnet arranged in a base of the drill housing and operable, in response to a DC voltage, to magnetically couple the base to a surface proximate to the base; an AC/DC converter configured to receive the AC input signal and operates, independent from the controller and in the presence of the AC input signal, to output a DC voltage to the electromagnet; and an alternate power source circuit that monitors the DC voltage output by the converter and, in the absence thereof, provides an alternate DC voltage to the electromagnet.

A part holding assembly, an assembly system and a method of positioning a first part are disclosed. The part holding assembly is coupleable to a support structure. The part holding assembly includes a base adapted to be coupled to the support structure. The part holding assembly also includes a first pin extending outwardly away from the base to a distal end that is spaced from the base. The base is movable to position the first pin relative to a first part and to insert the distal end of the first pin through a first hole of the first part to locate the first part. The part holding assembly further includes a first magnet adjacent to the first pin. The first magnet is selectively magnetized to selectively secure the position of the first part relative to the base.

A magnetic apparatus (1) comprising a magnetizable surface (2) configured to anchor a one or more ferromagnetic elements in a removable manner and a plurality of magnetic poles (3), each provided with a free surface (4) thereof, the magnetizable surface (2) being at least partially defined by the free surfaces (4) of said plurality of magnetic poles (3) placed side by side; one part of said magnetic poles (3) has at least two measuring areas (5) on the free surface thereof, each measuring area (5) being associated with at least one sensor (6) adapted to detect a magnetic flux exiting from said area.

This application relates to devices and accessories that include or are configured to react with a mixture of electromagnets and permanent magnets. In particular the permanent magnets are configured to maintain persistent connections between components while the electromagnets are configured to pulse or activate periodically to maintain the connections or fix alignment of the various connections in certain circumstances.

A rail processing device (1) comprising at least a first (3A) and a second work station (3B) provided on a common frame (30), and configured to alternately lock a rail (2) when the latter is being processed, each work station (3A, 3B) comprising at least a first magnetic anchorage plane (4) configured to cooperate with a web (2A) of the rail (2) when the latter is being processed in the respective station, and a transport system (50A, 50B) to move the rail (2) from the first work station (3A) to the second work station (3B) and vice versa.

The present disclosure provides a magnetic grinding device and a magnetic grinding control method, and relates to the field of machining. According to the device, a magnet platform of a grinding piece fixing table is connected with an electromagnet; the grinding piece fixing table is used for fixing a to-be-ground workpiece; an output end of a programmable power supply is connected with a coil of the electromagnet; a permanent magnet grinding rod is located above the to-be-ground workpiece; and a magnetic grinding control system is connected with the programmable power supply and is used for acquiring grinding points, on the to-be-ground workpiece, of the permanent magnet grinding rod, and controlling an output voltage of the programmable power supply by utilizing a removal amount of a blank workpiece surface shape of the to-be-ground workpiece, the grinding points and a pulse width modulation (PWM) control method.

Provided is an electromagnetic chuck mounting structure capable of tightly and fixedly mounting an electromagnetic chuck on a table without fluctuation, having light weight, and making a low profile when an electromagnetic chuck is mounted on the table. The structure includes: a mounting groove recessed on an upper surface of the table and located inward of an edge of the table; a plurality of mounting holes formed at regular intervals on the mounting groove to fix the electromagnetic chucks to be mounted; and an adhesive filled and cured on the mounting groove and between the mounted electromagnetic chucks, wherein each of the electromagnetic chucks is fixedly fastened to each of the mounting holes by one fastening bolt, such that an upper surface of each electromagnetic chuck is aligned on a same plane with the upper surface of the table or protrudes from the upper surface of the table.

Magnetic sample holders for abrasive operations include an array of magnets embedded in a matrix material. Each magnet of the array is positioned between about 0 mm and about 4 mm from at least one adjacent magnet of the array. Exposed surfaces of the magnets of the array are coplanar with a planar working surface of the matrix material. Methods of forming a polycrystalline diamond compact element include magnetically securing an alloy sample to an array of magnets embedded in a matrix. Each of the magnets of the array is within about 4 mm of at least one adjacent magnet of the array. A portion of the alloy sample is abraded away, and the alloy sample is positioned proximate to diamond grains and a substrate. The alloy sample, diamond grains, and substrate are subjected to a high pressure/high temperature process to sinter the diamond grains.

A magnetic substance holding device includes: a first pole piece assembly comprising at least one first pole piece, at least two second pole pieces, and at least two first permanent magnets; a second pole piece assembly comprising at least one third pole piece, at least two fourth pole pieces, and at least two second permanent magnets; a coil; and a control device. The first pole piece assembly and/or the second pole piece assembly is configured to be movable such that they are switched between a first arrangement in which the second faces of the first pole piece assembly are spaced apart from the first faces of the second pole piece assembly, and a second arrangement in which the second faces of the first pole piece assembly come in contact with the first faces of the second pole piece assembly. The control device controls holding and detaching of a workpiece on and from the first faces of the first pole piece assembly or the second faces of the second pole piece assembly, by way of controlling electric current applied to the coil to switch between the first arrangement and the second arrangement.

A method of milling a piece of raw steel stock comprising: presenting a piece of raw steel stock having a first surface and a second surface having a perimeter; presenting a magnetic chuck with a top surface configured to support the piece of raw steel stock for milling with magnetic capabilities; arranging a minimum of four solid pole extensions on the top surface to support the second surface of the piece of raw steel stock for milling of the first surface thereof such that the solid pole extensions will be relatively evenly distributed beneath the perimeter of the second surface; arranging multiple mobile pole extensions on the top surface to further support the second surface; placing the second surface onto the multiple mobile pole extensions and the solid pole extensions; activating the magnetic capabilities of the magnetic chuck; and milling the first surface to a desired flatness.