An electric permanent magnet chuck, comprising a casing (1), the casing being provided thereon with at least one open inner cavity; reversible magnetic material (2) is provided at a lower portion of the inner cavity, and a coil (3) is arranged in the inner cavity along an outer wall of the reversible magnetic material; a magnetic pole (4) is superposed and fixed in the inner cavity, an annular groove being provided at a lower surface of the magnetic pole, and permanent magnetic material (5) that matches the annular groove being disposed in the annular groove. The electric permanent magnet chuck has the advantages of a simple structure, low processing difficulty, good sealing performance, small magnetic loss and so on.

A mounting device for mounting a machine tool to a floor area is provided. The mounting device includes mounting units that are attachable to the machine tool. Counter-mounting units are disposed on the floor area. The mounting device may also include electromagnets that are disposed on either the mounting units or the counter-mounting units. The machine tool can be mounted or removed by switching the electromagnets on and off. When one of the mounting units or the counter-mounting units includes the electromagnets, the other may include a ferromagnetic material.

A method of milling a piece of raw steel stock comprising: arranging a minimum of four solid pole extensions on top surface segments of a magnetic chuck such that the solid pole extensions are relatively evenly distributed under a piece of raw steel stock and within 2 inches of a perimeter of the piece of raw steel stock; arranging multiple mobile pole extensions beneath the piece of raw steel stock and on every other top surface segment of the magnetic chuck under the piece of raw steel stock that is not occupied by the solid pole extensions but beneath the piece of raw steel stock, each of the multiple mobile pole extensions having a biased top portion that contacts the piece of raw steel stock; milling the piece of raw steel stock with a face mill that generates steel chip as swarf; and recycling the steel chip.

A method of milling a piece of raw steel stock comprising: arranging a minimum of four solid pole extensions on top surface segments of a magnetic chuck such that the solid pole extensions are relatively evenly distributed under a piece of raw steel stock and within 2 inches of a perimeter of the piece of raw steel stock; arranging multiple mobile pole extensions beneath the piece of raw steel stock and on every other top surface segment of the magnetic chuck under the piece of raw steel stock that is not occupied by the solid pole extensions but beneath the piece of raw steel stock, each of the multiple mobile pole extensions having a biased top portion that contacts the piece of raw steel stock; milling the piece of raw steel stock with a face mill that generates steel chip as swarf; and recycling the steel chip.

This work clamping device including a receiving member which has a first contacting surface which comes into contact with a first circumference position of an outer circumference surface of a columnar portion of a work and a second contacting surface which comes into contact with a second circumference position of the outer circumference surface of the columnar portion, an attraction member which is provided in the receiving member and which is made of a ferromagnetic material or a magnet, a pre-clamping positioning member which is attached to the columnar portion and which temporarily hold the columnar portion to the receiving member by being attracted to the attraction member by magnetic force, and a clamp mechanism which presses the columnar portion temporarily positioned by the pre-clamping positioning member toward the receiving member.

An electrostatic chuck device comprising: a plate-shaped electrostatic chuck part which has an electrostatic adsorption electrode provided therein and has a mounting surface on which a plate-shaped sample is mounted; and a base part which supports the electrostatic chuck part on a support surface thereof from an opposite side of the mounting surface, wherein the base part has a disk shape which has a central axis at a center thereof, and a coolant channel extending along the support surface is provided inside the base part, wherein the coolant channel includes an outer peripheral channel which overlaps an outer edge of the plate-shaped sample when viewed from an axial direction of the central axis, and an inner peripheral channel which is disposed on an inner side in a radical direction than the outer peripheral channel, wherein at least a portion of the inner peripheral channel extends spirally around the central axis, and a channel cross-sectional area of the inner peripheral channel decreases as a distance from the central axis increases.

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.

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.

A fixation device is adapted to be mounted with a machine tool and mounted to a machine bed. The fixation device includes a fixed seat, a magnetic unit, and at least one ejection unit. The fixed seat has a bottom surface and a plurality of grooves formed in the bottom surface. The magnetic unit includes a plurality of magnet blocks fixed respectively in the grooves and adapted to be magnetically positioned on the machine bed. The at least one ejection unit is mounted on the fixed seat, and includes an operating member and a supporting member. The operating member is operable to move the supporting member from a first position, where a bottom end of the supporting member is flush with the bottom surface of the fixed seat, to a second position, where the bottom end of the supporting member protrudes out from the bottom surface of the fixed seat.

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.