Magnetic device for magnetically anchoring ferrous elements

Abstract

A magnetic device (10A) for magnetically anchoring an ferrous element includes: a support structure (11, 11A) having a predetermined width (L), length (l), and thickness (S), and a plurality of polarity units (30A); in the support structure (11, 11A), a first side (12) and a second side (13) are defined at opposite surfaces of a larger extension; the polarity units (30A) are accommodated within the thickness (S) of the support structure (11, 11A) and include a magnetic circuit having at least one corresponding first pole assembly (50) generating at least a first magnetic flux in the first side (12) to define a magnetically anchorable first ferrous element. A first magnetic anchoring surface, a lateral portion (50A) of each first pole assembly (50) defining a portion of the first side (12), each first pole assembly (50) being integrally formed with a support structure (11) to produce an integral magnetic device (10A), each first pole assembly (50) having a lateral surface (50C) extending between the lateral portion (50A) and the bottom (50B); a first recess (R1) obtained from the first side (12) within a thickness (S) and at least partially defining the outer surface (50C); a filling element (200) disposed within the first recess (R1) and configured to define a portion of the surface of the first side (12); the filling element (200) being made of a non-ferromagnetic metal alloy.

Description

Technical Field

[0001] The present invention relates to an integral magnetic device as defined in the preamble of embodiment 1.

[0002] Preferably, such magnetic devices are typically associated with iron-containing component processing equipment, such as, for example, machine tools or machines typically used for anchoring ferromagnetic components. Background Technology

[0003] According to existing technology, magnetic anchoring devices of the type of dual-magnet electro-permanent magnet include a housing made of a solid rod of ferromagnetic material, the housing having a bottom on which a plurality of polarity units are arranged on the inner surface of the bottom.

[0004] Alternatively, the housing can be obtained by assembling different components together according to methods known to those skilled in the art.

[0005] In the case of electro-permanent magnet devices, each polarity unit includes at least:

[0006] - One or more pole units,

[0007] - One or more magnetic cores;

[0008] - An electrical winding (also called a solenoid) used to change the magnetization state is configured around a reversible permanent magnet core.

[0009] Furthermore, according to known techniques, the polarity unit can be associated with the frame, for example, by means of screws inserted into suitable holes, in order to securely encapsulate the solenoid-reversible magnet assembly.

[0010] Additionally, it is conceivable that if the processing requires the use of iron-containing components, one or more polar units would be associated with corresponding polar extensions.

[0011] In addition, a "resin casting" process is provided, which makes the magnetic device virtually impermeable to impurities and / or liquid leaks, and ensures the filling of gaps.

[0012] Specifically, it is specified that the recesses of the components into which the polarity units are inserted and held are defined within the housing of the device. These recesses are obtained from both the bottom surface and the support surface.

[0013] Once the aforementioned components of the polarity unit are positioned, resin casting is performed, which allows the support surface and bottom surface to be flat and consistent, making them waterproof and holding the components of the polarity unit in place.

[0014] It should be noted that magnetic devices can be fixed to the support surface by magnetic anchoring or by typical mechanical fastening, where possible.

[0015] Specifically, the outer surface of the bottom of the housing of the magnetic device is attached to the surface of the aforementioned processing apparatus. After the device is fixed to the surface of the processing apparatus, the anchoring plane can magnetically hold the ferrous element for machining.

[0016] For example, if the bottom of the magnetic device is to be removably constrained to the frame of a machine tool (also known as a substrate), then constraint components such as clamps, bolts and / or screws are used, which can mechanically hold the magnetic device during machining operations of ferrous elements or during use of magnetic anchoring.

[0017] In practice, in order to perform machining operations on ferrous components, it is first necessary to connect and hold the bottom of the magnetic device to the machining apparatus by combining one or more of the aforementioned constraint components, thereby ensuring sufficient proximity between the surface and the machine substrate.

[0018] Subsequently, the iron-containing element must be positioned on the anchoring plane, and the magnetic device must be activated to magnetically anchor the iron-containing element to the aforementioned anchoring plane.

[0019] Once the iron-containing element has been anchored to the anchoring plane and the necessary machining has been performed on it, the anchoring plane will typically wear down over time. Specifically, the anchoring plane tends to lose its flatness in order to properly hold the iron-containing element.

[0020] To overcome these wear problems, it is known to perform grinding operations on the anchoring plane using relevant machinery. These operations actively remove a portion of the substrate at the anchoring plane in order to restore the lost flatness.

[0021] Background Art Problems

[0022] By gradually reducing the thickness of the substrate itself to restore the flatness of the anchoring plane through material removal via grinding, the following results:

[0023] - The equipment is weakened in terms of mechanical stress;

[0024] - Gradually eliminate the seats for components used in polarity units;

[0025] - Damage to the resin casting and the creation of cracks allow impurities to leak and pass through, leading to a deterioration of the working conditions. Specifically, resin is known to tend to weaken and break down after one or more grinding processes.

[0026] The downside is that existing magnetic devices have a shortened lifespan due to grinding operations, even though grinding operations are necessary to extend the lifespan of magnetic devices. Summary of the Invention

[0027] The purpose of this invention is to overcome the shortcomings discussed with reference to the prior art, and in particular to provide a magnetic device for magnetically anchoring ferrous elements, which can improve the service life of the magnetic device itself.

[0028] These and other objectives are achieved by a magnetic device according to any of the appended technical solutions.

[0029] Advantages of the invention

[0030] Advantageously, the magnetic device of the present invention allows for maintaining impermeability to impurities and / or liquid leakage, as well as preventing the filling of voids after grinding operations.

[0031] Advantageously, the magnetic device of the present invention also allows for an increased service life after the necessary grinding operation.

[0032] Other features and advantages of the invention will be recognized by those skilled in the art from the following detailed description of exemplary embodiments of the invention. Attached Figure Description

[0033] To better understand the following detailed description, some embodiments of the invention are illustrated in the accompanying drawings, wherein:

[0034] - Figure 1 A perspective view of a magnetic device according to an embodiment of the present invention is shown;

[0035] - Figure 2 A perspective view of another magnetic device according to an embodiment of the present invention is shown;

[0036] - Figure 3 A partial cross-sectional view of a magnetic device according to a first embodiment of the present invention is shown;

[0037] - Figure 4 A partial cross-sectional view of a magnetic device according to a second embodiment of the present invention is shown;

[0038] - Figure 5 A partial cross-sectional view of a magnetic device according to a third embodiment of the present invention is shown;

[0039] - Figure 6 It shows Figure 5 An exploded view showing the details of the magnetic device. Detailed Implementation

[0040] Even if not explicitly stated, the features described with reference to the specific embodiments should be understood as being subordinate to and / or interchangeable with other features described with reference to other embodiments.

[0041] It should be noted that the present invention has a magnetic device for magnetically anchoring ferrous elements as its object, the general and operational characteristics of which are extensively described in patents EP2653262B1, EP2476509B1 and EP2280804B1, which are referred to for any further details.

[0042] In the following text, some definitions are taken from the already mentioned patents to facilitate understanding of the discussion. Therefore, those skilled in the art may refer to the aforementioned patents for any further information. Furthermore, the same numbering is maintained where possible.

[0043] In the continuation of this specification, the term "magnetic device" means:

[0044] - A magnetic permanent magnet device, that is, a device that does not require power during its use in the anchoring step and the step of changing the activation state, is made of permanent magnets that are properly configured inside the device itself;

[0045] - Electro-permanent devices, i.e. devices that do not require power during the anchoring step but still require power during the activation and deactivation steps, are made of reversible permanent magnets and, if necessary, of static permanent magnets properly configured inside them;

[0046] - Electromagnetic devices, i.e., devices that require power during the anchoring process in their use, have magnetic cores made of ferromagnetic materials.

[0047] For the purposes of this invention, in the following description of this specification, the term "polar collector" refers to an element that typically has a side surface that is magnetically neutral when the magnetic device is deactivated and magnetically active when the magnetic device is activated.

[0048] In other words, the pole piece can have six surfaces: the magnetic field in four of these surfaces is configured in a single direction, the direction of the magnetic field in the fifth surface can be changed so that it has the same or opposite polarity as the magnetic field present in the other four surfaces, and the sixth surface coincides with a side that is magnetically neutral when the magnetic field generated on the fifth surface has the opposite polarity to the magnetic field of the other four surfaces (so the magnetic device is deactivated), or magnetically active when the magnetic field generated on the fifth surface has the same polarity to the magnetic field of the other four surfaces (so the magnetic device is activated).

[0049] Essentially, a pole collector is simply a component that can transfer the magnetic flux generated by a reversible permanent magnet core toward a side surface to create a magnetic anchoring plane.

[0050] It should be noted that the side surface of the "N" pole assembly, as a whole, defines a magnetic anchoring plane that can firmly anchor the iron-containing element P to be machined.

[0051] For the purposes of this invention, the term "activate / deactivate magnetic device" means the possibility of changing the magnetization state of a magnet under the action of electrical control suitable for generating an appropriate electromagnetic field in the electrical winding.

[0052] In the continuation of this specification, the invention is described with reference to magnetic devices of the type of dual-magnet electro-permanent magnet.

[0053] Reference Appendix Figure 1 and attached Figure 2 The magnetic anchoring device according to the present invention is generally designated as 10A.

[0054] A magnetic device 10A for magnetically anchoring ferrous elements includes a support structure 11 having a predetermined width L, length l, and thickness S.

[0055] Specifically, the support structure 11 defines a first side portion 12 and a second side portion 13 on opposite surfaces of the larger extension.

[0056] Preferably, the first side portion 12 and the second side portion 13 extend parallel to each other to define corresponding planes.

[0057] As will be apparent from the continuation of this specification, one plane (e.g., the plane defined by side 12) is intended to be the surface on which an iron-containing element to be machined will be magnetically anchored, while another plane (e.g., the plane defined by side 13) is intended to be the surface on which an iron-containing material, such as a substrate of a machine tool, can be mechanically and / or magnetically anchored.

[0058] It should be noted that the first side portion 12, as defined below, is a side portion that has undergone significant machining and wear, and it has undergone grinding operations or alternatively turning operations.

[0059] The magnetic device 10A includes multiple polarity units 30A with opposing magnetic circuits.

[0060] According to a preferred embodiment, multiple (“N”) polar units 30A are accommodated in a thickness S.

[0061] Specifically, the polarity unit 30A includes at least one first pole assembly 50. As described below, the first pole assembly 50 is configured to generate at least a first magnetic flux in the first side portion 12 in order to define a first anchoring magnetic surface for magnetically anchoring the first ferro-containing element.

[0062] It should be noted that each first pole assembly 50 has a lateral portion 50A that defines a portion of the first side portion 12. Furthermore, each first pole assembly 50 has a lateral surface 50C extending between the lateral portion 50A and the bottom portion 50B along a first direction XX preferably perpendicular to the first side portion 12 and the second side portion 13.

[0063] Of particular note is that, advantageously, the first pole assembly 50 and the support structure 11 are made as a single piece in order to form an integral magnetic device 10A.

[0064] In fact, as in Figures 3 to 5 As can be seen, the first pole assembly 50 is an integral part of the support structure 11 because it is obtained by machining processes, such as material removal, in order to form the first pole assembly 50.

[0065] According to, for example Figure 3 and Figure 4 In the preferred embodiment illustrated, each polarity unit 30A includes at least a first magnetic core 40 and an electrical winding 30 arranged around it for changing the magnetization state of the first magnetic core 40.

[0066] For example, the first reversible permanent magnet core 40 is implemented as an AlNiCo type reversible permanent magnet.

[0067] Advantageously, the polarity unit 30A includes a second pole assembly 60, the lateral portion 60A of which defines a portion of the second side portion 13.

[0068] It is particularly noteworthy that the surface 50A of the first pole assembly 50 defines a portion of the anchoring surface of the first side 12, while the surface 60A of the second pole assembly 60 defines a portion of the surface of the second side 13.

[0069] The second pole assembly 60 is positioned close to the first magnetic core 40 to encapsulate and secure the magnetic core 40 and the electrical winding 30 against the bottom 50B of the first pole assembly 50.

[0070] according to Figure 5 and Figure 6 In the alternative preferred embodiment illustrated, the polarity unit 30A may further include a second magnetic core 90.

[0071] According to techniques known to those skilled in the art, these second magnetic cores 90 are properly oriented and disposed near the face of the first pole assembly 50, and therefore will not be described in detail.

[0072] The second magnetic core 90 is preferably implemented as a permanently magnetized irreversible magnetic core, for example, made of ferrite or NdFeB.

[0073] Preferably, the second magnetic core 90 is configured to generate a second magnetic flux on the first anchoring surface of the first side portion 12 in order to magnetically anchor the first iron-containing element by means of the first flux and the second flux.

[0074] It should be noted that the components of polarity unit 30A can be held together by means of constraint elements such as screws and / or resin suitable for fixing the components within the thickness S.

[0075] Advantageously, in a preferred embodiment of the magnetic device 10A, the aforementioned element is implemented as an element having a circular planar cross-section.

[0076] Specifically, we have, for example:

[0077] - The first magnetic core 40 is implemented as a cylindrical body, which has a thickness and a diameter.

[0078] - The electrical winding 30 is implemented as a toroidal element with a large thickness and a diameter larger than that of the first magnetic core 40.

[0079] - The second pole assembly 60 is implemented as a cylindrical body having a predetermined thickness and a diameter equal to that of the magnetic core 40.

[0080] - If present, the second magnetic core 90 is implemented as multiple parts of a ring-shaped element with diameter and thickness.

[0081] It should be noted that the thickness of the second pole assembly 60 is suitable for removing the magnetic flux generated by the magnetic core 40 or most of it, so that the surface of the second side 13 is magnetically active, i.e. has a magnetic force value sufficient to anchor the magnetic device 10A through the second side 13.

[0082] Alternatively, the elements constituting the N polarity units 30A may have a quadrilateral or rectangular planar cross section or any other shape.

[0083] It should be noted that the “N” polar units 30A can be freely configured within the structure 11, that is, they can be configured without following a predefined geometric pattern.

[0084] However, according to a preferred embodiment, the "N" polar units 30A are arranged in the structure 11 according to a predetermined scheme; for example, the "N" polar units 30A can be arranged in a matrix-like scheme ( Figure 1 ).

[0085] Preferably, the centers C of the “N” polar units 30A are arranged along the lines and / or columns that constitute the matrix.

[0086] Advantageously, according to the usual method of using the device 10A, a hole or groove 15 may be formed on the first side 12.

[0087] It should be noted that the fixing device can be associated with each hole 15.

[0088] The handle of the magnetic pole extension (not shown) can be associated with the fixing device 16.

[0089] According to a preferred embodiment, the support structure 11 includes a first recess R1 contained within the thickness S of the support structure 11. According to a preferred embodiment, and in combination with the foregoing embodiments, the support structure 11 includes a second recess R1 contained within the thickness S of the support structure 11.

[0090] In addition to defining the first pole assembly 50, these recesses are also shaped to accommodate elements constituting the polarity unit 30a, as described in more detail below.

[0091] The first recess R1 is defined within the thickness S of the support structure 11, starting from the outer surface of the first side portion 12.

[0092] These first recesses R1 at least partially define the lateral surface 50C of the first pole assembly 50.

[0093] It should be noted that the transverse surface 50C of the first pole assembly 50 extends in a direction substantially transverse to the first side 12 and / or the second side 13.

[0094] In particular, the transverse surface 50C is not certain about any part of the side 12.

[0095] A second recess R2 is formed from the second side portion 13 within the thickness S. It should be noted that the second pole assembly 60, the first magnetic core 40, and the electrical winding 30 are accommodated in the second recess R2.

[0096] According to a preferred embodiment having a second magnetic core 90, the second recess R2 is configured to also accommodate the second magnetic core 90.

[0097] In other words, each second recess R2 is configured to receive the second pole assembly 60 of the opposite polarity unit 30A, the first magnetic core 40, the electric winding 30, and the second magnetic core 90 (if present).

[0098] Preferably, the second recess R2 defines the bottom 50B of the first pole assembly 50.

[0099] In fact, it can be envisioned that the aforementioned second recess R2 at depth S' in the thickness S of the support structure 11 starting from the outer surface of the second side 13 is made into a suitable shape to define the bottom 50B of the first pole assembly 50 and optionally define at least a portion of the transverse surface 50C.

[0100] according to Figure 5In the illustrated embodiment, the first recess R1 defines a first portion of the lateral surface 50C' of the first pole assembly 50, and the second recess R2 defines a second portion of the lateral surface 50C'' of the first pole assembly 50. In this embodiment, the second magnetic core 90 is configured to be received in the second recess R2 within the portion defining the second portion of the lateral surface 50C''.

[0101] It should be noted that the first recess R1 is limited by the recess bottom 220 defined by the support structure 11 in a single piece, the lateral surface 50C of the first pole assembly 50, and the recess wall 221 surrounding the lateral surface 50C obtained in the support structure 11.

[0102] According to a preferred embodiment, each first recess R1 has a recess depth Pr between 5 mm and 25 mm.

[0103] According to a preferred embodiment, each first recess R1 has a recess width Lr measured from the transverse surface 50C to the recess wall 221, which is between 3 mm and 12 mm.

[0104] Preferably, the second recess may have a circular and / or quadrilateral shape, as shown below. Figure 1 and Figure 2 As shown in the diagram.

[0105] The magnetic device 10A includes a filling element 200 disposed within a first recess R1 and configured to define a surface portion of a first side 12.

[0106] It should be noted that the filling element 200, together with the support structure 11 that obtains the first recess R1, defines a panel integrated into the thickness of the support structure 11. Specifically, device A has an integrally integrated panel with the support structure 11.

[0107] The integrated panel extends from the first side 11 to a panel depth equal to the recess depth Pr. In this way, the integrated panel allows for grinding and turning on the first side 11 to increase the thickness before damaging the relative polarity unit 30A, thereby protecting the first recess R1 with the filler element 200.

[0108] Advantageously, integrated panels increase the lifespan of the equipment by eliminating the need for external panels and thus simplifying manufacturing.

[0109] According to a preferred embodiment, the filling element 200 is made of a non-ferromagnetic metal alloy.

[0110] Advantageously, the non-ferromagnetic metal alloy filling element 200 not only avoids interfering with the magnetic flux of the polarity unit 30A, but also allows for improved tolerance to continuous grinding processes. Furthermore, due to its improved tolerance compared to resin, the non-ferromagnetic metal alloy filling element 200 ensures impermeability even after undergoing one or more grinding processes by preventing the leakage and passage of impurities within the support structure.

[0111] Preferably, the non-ferromagnetic metal alloy is selected from brass and steel.

[0112] It should be noted that each filling element 200 follows the first recess R1 for insertion therein.

[0113] Advantageously, the recess depth Pr within the aforementioned range provides a larger thickness to be ground, thereby increasing the grindable thickness of both the first pole assembly 50 and the support structure 11.

[0114] Advantageously, the recess width Lr within the aforementioned range allows for easier formation of the first recess R1 within the aforementioned depth range.

[0115] Advantageously, the use of a non-ferromagnetic metal alloy filler element 200 ensures resistance to grinding and proper structural support in the relative first recess R1 with a recess depth Pr and optional recess width Lr within the aforementioned range.

[0116] Advantageously, the magnetic device of the present invention increases its service life by having the possibility of supporting a large number of grinding processes.

[0117] According to a preferred embodiment, each filling element 200 has at least one annular body 210 configured to be inserted into a first recess R1. Specifically, the annular body 210 extends along a first direction XX between a tail 211 and a head 212. The annular body 210 defines a channel 213 adapted to receive a portion of the first pole assembly 50 defined by the first recess R1. It should be noted that the head 212 is configured to define a portion of the surface of a first side 12. Specifically, once the filling element 200 is inserted into the recess, the head 212 defines a portion of the surface of the first side 12.

[0118] Preferably, the tail portion 211 is configured to at least partially abut against the bottom of the recess 220.

[0119] According to a preferred embodiment, the annular body 210 has a chamfered surface at the tail 211 facing the center of the passage 213.

[0120] Advantageously, the chamfered surface facilitates the insertion of the annular body 210 into the first recess R1.

[0121] Preferably, the filling element 200 is inserted into the opposing first recess R1 in a manner that is integral with the support structure 11.

[0122] More preferably, each filling element 200 is integral with the support structure 11 by applying an adhesive-type fastener between the first recess R1 and the filling element 210. For example, the adhesive-type fastener can be glue.

[0123] According to a preferred embodiment, each electrical winding 30 has a number of turns that depends on the recess depth Pr. To avoid a decrease in magnetic flux, the number of turns in the electrical winding 30 needs to be increased up to 30%, and magnetization needs to be controlled, because the recess depth Pr and therefore the thickness S decrease with the continuous grinding process. Specifically, the number of turns in the electrical winding 30 is increased up to 30% as a function of the recess depth Pr.

[0124] It should be noted that the magnetic flux on the surface of the first side portion is a function of the recess depth Pr, which causes the first side portion 12 to move away from the first magnetic core 40, away from the electrical winding 30, and optionally away from the second pole assembly 60 and away from the second magnetic core 90 (if present).

[0125] Advantageously, a control unit operably connected to the magnetic device 10A is provided to control the operating conditions of the device itself.

[0126] Specifically, the control unit is electrically associated with the magnetic device 10A via an electrical connection for controlling the electrical winding 30, so as to change the magnetization state of the magnetic core 40 according to specific operating conditions.

[0127] The control unit includes multiple keys, which, when pressed, allow the operator to command the magnetic device to operate according to operating conditions, as described in more detail below.

[0128] The static characteristics of the magnetic device 10A have been described so far. For the operational characteristics, see patents EP2653262B1, EP2476509B1 and EP2280804B1, except as described below.

[0129] In particular, it should be noted that when the magnetic device 10A is in operating condition and is therefore magnetically active, the polarity unit 30a generates at least a first magnetic flux on the first side 12.

[0130] This magnetic flux is capable of magnetically anchoring the first iron-containing element.

[0131] Advantageously, the first magnetic flux defines another magnetic anchoring surface at the second side 13 in order to magnetically anchor the second iron-containing element.

[0132] In other words, when the magnetic device 10A is in operating condition, the polarity unit 30A generates at least the same magnetic flux on the second side 13 that is capable of magnetically anchoring the second iron-containing element.

[0133] It should be noted that the magnetic flux leaving polarity unit 30A has the opposite direction to the flux leaving the adjacent polarity unit, so as to connect with the adjacent polarity unit and thereby create a so-called bidirectional magnetic circuit.

[0134] For a description of the operation and advantages of using a bidirectional magnetic circuit, see US 4356467.

[0135] Thus, the at least one first magnetic flux leaves the predetermined field depth of the second side 13.

[0136] It should be noted that, in the following description, field depth refers to the minimum distance from the outer surface of the second side 13 within which all magnetic flux can be short-circuited between two different adjacent polarity units 30A.

[0137] In particular, the magnetic field generated by the magnetic device 10A, starting from the surface of the side 13 and exiting the second side 13, can have a field depth equal to the maximum value of the maximum linear dimension of the second pole assembly 60.

[0138] Therefore, starting from the surface of side 13, a magnetic flux can be generated, with a field depth T such that a sufficient magnetic force is generated to firmly attract the iron-containing element to the magnetic device 10A.

[0139] It should be noted that the magnetic force value sufficient to firmly attract the iron-containing element to the magnetic device 10A refers to a force value that is at least 15% greater than the maximum value that can be applied to the surface of the first side portion 12 relative to the same magnetic device 10A.

[0140] It should be noted that, under normal operating conditions of the magnetic device 10A illustrated, the anchoring conditions of the surface of the second side 13 are better than those of the surface of the first side 12.

[0141] In fact, the surface of the second side 13 is completely covered because the second side 13 is in full contact with the base plate of the machine tool, while the first side 12 is associated with the iron-containing part to be machined, which is typically smaller than the surface of the first side 12 and typically has a higher air gap.

[0142] This means that the air gap between the machine tool substrate and the second side 13 of the magnetic device 10A will be minimal, while there will be a more or less noticeable air gap between the first side 12 and the iron-containing workpiece P1.

[0143] Therefore, under these conditions, the value of the magnetic force generated on the surface of the second side 13 is equivalent to the value of the magnetic force generated on the surface of the first side 12.

[0144] If the magnetic core 90 is also actually housed in the opposing recess, the opposing recess can generate a second magnetic flux on the first anchoring side 12 so as to magnetically anchor the first iron-containing element by means of the first flux and the second flux.

[0145] Therefore, the magnetic device 10A can have three different operating conditions, as described below:

[0146] - activation;

[0147] - Discontinued;

[0148] - Installation / removal.

[0149] In order to use the magnetic device 10A, a control unit is required that can appropriately change the magnetic field generated by the first magnetic core 40.

[0150] Specifically, the control unit is implemented to execute electrical commands for current control during the three different operating conditions described above.

[0151] Specifically, the control unit performs specific control for each of the three different operating conditions, as described below:

[0152] - When activated, a polarization cycle is provided in one direction of the first magnetic core 40.

[0153] - In the case of deactivation, a polarization cycle is provided in the opposite direction to the first magnetic core 40.

[0154] - Provides a demagnetization cycle for the first magnetic core 40 during installation / removal.

[0155] It should also be noted that the magnetic device 10A can be constrained to the machine tool substrate by magnetic force alone, but if such a requirement is required for processing, a mechanical constraint component placed between the magnetic device 10A and the substrate 17 is also provided.

[0156] As can be understood from the description already provided, the magnetic device according to the present invention allows for the fulfillment of the above-mentioned needs while overcoming the disadvantages mentioned in the introductory section of this specification.

[0157] Obviously, those skilled in the art can make many changes to the above-described variations in order to achieve specific or incidental purposes, and all such changes are included within the scope of protection defined by the appended claims.

Claims

1. A magnetic device (10A) for magnetically anchoring ferrous components, comprising: - Support structure (11, 11A) having a predetermined width (L), length (l) and thickness (S) and multiple polarity units (30A). - In the support structure (11, 11A), a first side (12) and a second side (13) are defined on opposite surfaces of the larger extension. - The polarity units (30A) are housed in the thickness (S) of the support structure (11, 11A) and include a magnetic circuit having at least one corresponding first pole assembly (50) generating at least a first magnetic flux in the first side (12) to define a first magnetic anchoring surface for magnetically anchoring a first ferro-containing element, and the polarity unit includes a first magnetic core (40) and an electrical winding (30) for changing the magnetization state of the first magnetic core (40), a lateral portion (50a) of each first pole assembly (50) defining a portion of the first side (12), each first pole assembly (50) being integrally formed with the support structure (11) to produce an integral magnetic device (10A), each first pole assembly (50) having a lateral surface (50c) extending between the lateral portion (50a) and the bottom (50b). - A first recess (R1) is obtained from the first side portion (12) within the thickness (S) and at least partially defines the outer surface (50c). - A filling element (200) disposed within the first recess (R1) and configured to define a portion of the surface of the first side portion (12); - The filling element (200) is made of a non-ferromagnetic metal alloy; Its features are, - Each first recess (R1) has a recess depth (Pr) between 5 mm and 25 mm. - The number of turns of the electrical winding (30) increases as a function of the recess depth (Pr) up to 30%.

2. The magnetic device (10A) according to claim 1, wherein the non-ferromagnetic metal alloy is selected from brass or steel.

3. The magnetic device (10A) according to claim 1 or 2, wherein each filling element (200) is formed at the first recess (R1).

4. The magnetic device (10A) according to any one of claims 1 to 3, wherein each filling element (200) has at least one annular body (210) configured to be inserted into the first recess (R1), the annular body (210) extending along an extension direction (XX) between a tail (211) and a head (212) and defining a passage (213) adapted to receive a portion of the first pole assembly (50) defined by the first recess (R1), the head (212) defining a portion of the surface of the first side (12).

5. The magnetic device (10A) according to claim 4, wherein the annular body (210) has a chamfered surface at the tail (211) facing the center of the passage channel (213).

6. The magnetic device (10A) according to any one of claims 1 to 5, wherein the first recess (R1) is limited by a recess bottom (220) defined in a single piece by the support structure (11), the lateral surface (50c) of the first pole assembly (50) and a recess wall (221) surrounding the lateral surface (50c) obtained in the support structure (11).

7. The magnetic device (10A) according to any one of claims 1 to 6, wherein the shape of the second recess may be circular or quadrilateral.

8. The magnetic device (10A) according to any one of claims 1 to 7, wherein each filling element (200) is inserted into the opposing first recess (R1) in a manner integral with the support structure (11).

9. The magnetic device (10A) according to claim 8, wherein each filling element (200) is integral with the support structure (11) by applying an adhesive-type fastener between the first recess (R1) and the filling element (210).

10. The magnetic device (10A) according to any one of claims 1 to 9, wherein: - Each polarity unit (30A) also includes - Electrical winding (30) for changing the magnetization state of the first magnetic core (40); - The second recess (R2) is obtained from the second side (13) within the thickness (S) and is configured to accommodate the second pole assembly (60), the first magnetic core (40) and the electric winding (30).

11. The magnetic device (10A) according to claim 11, wherein - Each polarity unit (30A) includes a second magnetic core (90) for generating a second magnetic flux on a first anchoring surface of the first side (12) in order to magnetically anchor the first iron-containing element by means of the first flux and the second flux; - The second recess (R2) is configured to receive the second magnetic core (90) and at least partially define the outer surface (50c) of the first pole assembly.

Images