WO2012174858A1

WO2012174858A1 - Magnetic leakage type magnetic sucker

Info

Publication number: WO2012174858A1
Application number: PCT/CN2012/000856
Authority: WO
Inventors: 丁弘
Original assignee: 布里斯克磁业(上海)有限公司
Priority date: 2011-06-23
Filing date: 2012-06-21
Publication date: 2012-12-27
Also published as: CN202102825U

Abstract

A magnetic leakage type magnetic sucker (1) which comprises an upper base (2), a lower base (3) and a magnetic component (4). The upper base (2) is made of a single conductive magnetic material and is provided with a top wall (2a) the top surface of which is substantially arranged on the same plane, a side wall (2b) perpendicular to the top surface, a cavity (2c) formed by the inner surface of the top wall (2a) and the inner circumferential surface of the side wall (2b) and a plurality of uniformly-distributed iron cores (2d) which are integrated with the top wall (2a), perpendicular to the top surface and protrude toward the cavity (2c). The cooling liquid used during workpiece machining and the magnetic impurities do not permeate or enter into the magnetic leakage type magnetic sucker and cause the loss of the inner insulation in the magnetic leakage type magnetic sucker, thus improving the service life of the magnetic leakage type magnetic sucker.

Description

Description Magnetic leakage magnetic chucks

The utility model relates to a magnetic chuck, in particular to a magnetic leakage magnetic chuck. Background technique

Magnetic chucks can be divided into: electromagnetic chucks and electric permanent magnet chucks according to the power consumption during their operation.

The electromagnetic chuck refers to the inner core of the suction cup and the coil surrounding the iron core. When the coil continuously passes the direct current, the iron core generates magnetic flux, and the suction cup displays magnetic property. When the current stops, the magnetic flux disappears, and the suction cup does not display magnetic properties. Most of the current designs are magnetically non-magnetic, so that the magnetic force can be maximized. However, since the magnetic pole and the magnetic pole must be separated by a non-magnetic material to prevent a magnetic short circuit between the magnetic pole and the magnetic pole, a commonly used material is a non-ferrous metal such as epoxy resin or copper. Since the suction cup working surface is composed of two materials, when the ambient temperature changes, it is easy to cause a gap caused by the inconsistent thermal expansion and contraction coefficient, which causes the coolant and other magnetic conductive substances to penetrate into the inside of the suction cup, resulting in loss of insulation inside the suction cup, which affects The life of the suction cup.

The electric permanent magnet suction cup has been widely used in the field of mechanical processing as a high-efficiency holding method because it does not use electricity, has no thermal deformation, and has large suction force. According to the magnetic circuit design, there are magnetic difference and non-magnetic difference. In either case, most of the current designs are magnetically non-magnetic, so that the magnetic force can be maximized.

The so-called magnetic differential type permanent magnetic chuck refers to a circuit composed of two different kinds of magnets inside the suction cup, generally composed of neodymium iron boron with high coercive force and aluminum nickel cobalt with low coercive force, aluminum nickel cobalt The direction of the magnetic field line can be inside the external excitation coil The direction of the current is determined. When the directions of the magnetic lines of the two magnets are the same, the magnetism is displayed externally. When the magnetic lines of the two magnets are opposite in direction, the two are neutralized and the magnetism is not displayed externally. However, since the magnetic pole and the magnetic pole must be separated by a non-magnetic material to prevent a magnetic short circuit between the magnetic pole and the magnetic pole, a commonly used material is a non-ferrous metal such as epoxy resin or copper. Since the suction cup working surface is composed of two materials, when the ambient temperature changes, it is easy to cause a gap caused by the inconsistent thermal expansion and contraction coefficient, which causes the coolant and other magnetic conductive substances to penetrate into the inside of the suction cup, resulting in loss of insulation inside the suction cup, which affects The life of the suction cup.

The so-called non-magnetic difference type electric permanent magnet suction cup refers to a circuit composed of only one kind of magnet inside the suction cup, generally composed of aluminum-nickel-cobalt with low coercive force. The direction of the magnetic line of the alumino-nickel-cobalt can be from the direction of the current in the external excitation coil. It is decided that when the exciting coil is excited by the AlNiCo, the magnetism is externally displayed, and when the exciting coil is demagnetized by the AlNiCo oscillation, the magnetism is not displayed externally. However, since the magnetic pole and the magnetic pole must be separated by a non-magnetic material to prevent a magnetic short circuit between the magnetic pole and the magnetic pole, a commonly used material is a non-ferrous metal such as epoxy resin or copper. Since the suction cup working surface is composed of two materials, when the ambient temperature changes, it is easy to cause a gap caused by the inconsistent thermal expansion and contraction coefficient, which causes the coolant and other magnetic conductive substances to penetrate into the inside of the suction cup, resulting in loss of insulation inside the suction cup, which affects The life of the suction cup. Utility model content

In view of the above problems, the object of the present invention is to provide a magnetic leakage type magnetic chuck, wherein the working surface of the magnetic chuck is an integral magnetic conductive material, allowing a small amount of magnetic leakage to exist, but at the same time solving the problem of leakage of the working surface of the magnetic chuck. , to greatly increase the life of the magnetic chuck.

The magnetic flux leakage type magnetic chuck according to the present invention comprises an upper base, a lower base and a magnetic component, wherein the upper base is composed of a single magnetically permeable material, and has a top wall whose top surface is substantially in the same plane, perpendicular to the top surface. Side wall, by the inside of the top wall A cavity formed by the inner peripheral surface of the surface and the side wall and a plurality of uniformly distributed cores integrally formed with the top wall and projecting into the cavity perpendicular to the top surface.

Since the top surface of the upper pedestal is an integral magnetically permeable material, when the ambient temperature changes, the gap caused by the inconsistent thermal expansion and contraction coefficient is not caused. Therefore, the coolant and magnetic conductive impurities used in the processing of the workpiece are not Infiltrating into or into the magnetic leakage magnetic chuck, causing loss of internal insulation of the magnetic leakage magnetic chuck, thereby effectively improving the service life of the magnetic leakage magnetic chuck. DRAWINGS

The technical solution of the present invention will be described in detail with reference to the following drawings.

1 shows a partial exploded perspective view of a magnetic flux leakage type magnetic chuck 1 according to a first embodiment of the present invention;

Figure 2a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention taken along line A - A of Figure 1 in an excited state;

Figure 2b is a partial enlarged view of Figure 2a;

Figure 2c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention in an excited state; Figure 3a is a view showing the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention in the demagnetized state along the line of Figure 1 A-A section view;

Fig. 3b shows a top view of the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention in a demagnetized state; and Figs. 4a to 4c show the assembly process of the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention.

Figure 5 is a partial exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a second embodiment of the present invention;

Figure 6a shows a magnetic flux leakage type magnetic chuck 1 according to a second embodiment of the present invention along the line B of Figure 1 in a forward excitation state. a cross-sectional view of a B;

Figure 6b is a partial enlarged view of Figure 6a;

Figure 6c is a top plan view of the magnetic flux leakage type magnetic chuck 1 in a forward excitation state according to a second embodiment of the present invention; Figure 7a shows a magnetic flux leakage type magnetic chuck 1 in a reverse excitation state according to a second embodiment of the present invention. A cross-sectional view taken along line B-B of Figure 1;

Figure 7b is a top plan view showing the magnetic flux leakage type magnetic chuck 1 in a reverse excitation state according to a second embodiment of the present invention; Figures 8a-8d show the assembly process of the magnetic flux leakage type magnetic chuck 1 according to the second embodiment of the present invention;

Figure 9 is a partial exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention;

Figure 10a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the third embodiment of the present invention taken along line C-C of Figure 9 in an excited state;

Figure 10b is a partial enlarged view of Figure 10a;

Figure 10c is a top view showing the magnetic flux leakage type magnetic chuck 1 in an excited state according to a third embodiment of the present invention; Figure 11a shows a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention in the demagnetized state along the line in Figure 9. a cross-sectional view of C_C;

Figure 1 ib is a top plan view showing a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention in a demagnetized state; Figure 12 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a fourth embodiment of the present invention;

Figure 13a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the fourth embodiment of the present invention taken along the line D_D of Figure 12 in the forward excitation state;

Figure 13b is a partial enlarged view of Figure 13a;

Figure 13c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 in a forward excitation state according to a fourth embodiment of the present invention; Figure 14a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the fourth embodiment of the present invention taken along the line D_D of Figure 12 in the reverse excitation state;

Figure 14b is a top plan view showing a magnetic flux leakage type magnetic chuck 1 according to a fourth embodiment of the present invention in a reverse excitation state; Figure 15 is a partial exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a fifth embodiment of the present invention;

Figure 16a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the fifth embodiment of the present invention taken along line E_E of Figure 1 in an excited state;

Figure 16b is a partial enlarged view of Figure 16a;

Figure 16c is a top plan view showing a magnetic flux leakage type magnetic chuck 1 according to a fifth embodiment of the present invention in an excited state; Figure 17a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a fifth embodiment of the present invention in a demagnetized state along the line of Figure 15 a cross-sectional view of E-E;

Figure 17b is a top plan view showing a magnetic flux leakage type magnetic chuck 1 in a demagnetized state according to a fifth embodiment of the present invention; Figure 18 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention;

Figure 19a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the sixth embodiment of the present invention taken along the line F_F of Figure 18 in the forward excitation state;

Figure 1% is a partial enlarged view of Figure 19a;

Figure 19c is a top plan view showing a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention in a forward excitation state; Figure 20a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention in a reverse excitation state. A cross-sectional view taken along line F-F of Figure 18;

Figure 20b is a top plan view showing a magnetic flux leakage type magnetic chuck 1 in a reverse excitation state according to a sixth embodiment of the present invention; Figure 21 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a seventh embodiment of the present invention; Figure 22a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the seventh embodiment of the present invention taken along line G-G of Figure 21 in an excited state;

Figure 22b is a partial enlarged view of Figure 22a;

Figure 22c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 according to the seventh embodiment of the present invention in an excited state; Figure 23a is a view showing the magnetic flux leakage type magnetic chuck 1 according to the seventh embodiment of the present invention in the demagnetized state along the line of Figure 21 a cross-sectional view of G-G;

Figure 23b is a top plan view showing a magnetic flux leakage type magnetic chuck 1 in a demagnetized state according to a seventh embodiment of the present invention; Figure 24 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to an eighth embodiment of the present invention; A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the eighth embodiment of the present invention taken along line H-H of FIG. 24 in a forward excitation state;

Figure 25b is a partial enlarged view of Figure 25a;

Figure 25c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 according to the eighth embodiment of the present invention in a forward excitation state; Figure 26a is a view showing the magnetic flux leakage type magnetic chuck 1 according to the eighth embodiment of the present invention in a reverse excitation state. A cross-sectional view taken along line H-H of Figure 24;

Figure 26b is a top plan view showing the magnetic flux leakage type magnetic chuck 1 in the reverse excitation state according to the eighth embodiment of the present invention. Figure 27 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a ninth embodiment of the present invention. Figure 28a shows a magnetic flux leakage type magnetic chuck 1 according to a ninth embodiment of the present invention, along the line I of Figure 27 in an excited state. a sectional view of I;

Figure 28b is a partial enlarged view of Figure 28a;

Figure 28c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 in an excited state according to a ninth embodiment of the present invention; Figure 29a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the ninth embodiment of the present invention taken along line I-I of Figure 27 in a demagnetized state;

2% shows a top view of the magnetic flux leakage type magnetic chuck 1 according to the ninth embodiment of the present invention in a demagnetized state; and FIG. 30 shows a partial exploded perspective view of the magnetic flux leakage type magnetic chuck 1 according to the tenth embodiment of the present invention;

Figure 31a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the tenth embodiment of the present invention taken along line J-J of Figure 30 in an excited state;

Figure 31b is a partial enlarged view of Figure 31a;

Figure 31c is a top plan view showing the magnetic flux leakage type magnetic chuck 1 according to the tenth embodiment of the present invention in an excited state; Figure 32a is a view showing the magnetic flux leakage type magnetic chuck 1 according to the tenth embodiment of the present invention in the demagnetized state along the center line of Figure 30 a sectional view of J-J;

Figure 32b is a top plan view showing a magnetic flux leakage type magnetic chuck 1 according to a tenth embodiment of the present invention in a demagnetized state; Figure 33 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to an eleventh embodiment of the present invention; 34a shows a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the eleventh embodiment of the present invention along the line K-K in FIG. 33 in an excited state;

Figure 34b is a partial enlarged view of Figure 34a;

Figure 34c is a top plan view showing the magnetic leakage type magnetic chuck 1 according to the eleventh embodiment of the present invention in an excited state; Figure 35a is a view showing the magnetic leakage type magnetic chuck 1 according to the eleventh embodiment of the present invention in a demagnetized state; 33 section line K-K;

Figure 35b is a top plan view showing the magnetic flux leakage type magnetic chuck 1 according to the eleventh embodiment of the present invention in a demagnetized state. detailed description

Hereinafter, the best mode for carrying out the invention will be described with reference to the accompanying drawings. Herein, the same or equivalent portions in the respective drawings are denoted by the same reference numerals, and the repeated description thereof will be simplified or omitted as appropriate.

First embodiment

1 shows a partial exploded perspective view of a magnetic flux leakage type magnetic chuck 1 according to a first embodiment of the present invention; FIG. 2a shows a magnetic flux leakage type magnetic chuck 1 according to a first embodiment of the present invention in an excited state along line A_A of FIG. 2b is a partial enlarged view of FIG. 2a; and FIG. 2c is a top view showing the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention in an excited state.

The magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention is a magnetic flux leakage non-magnetic differential type permanent magnetic chuck. As shown in Fig. 1, Fig. 2a, Fig. 2b, and Fig. 2c, the magnetic leakage type magnetic chuck 1 includes an upper base 2, a lower base 3, and a magnetic assembly 4. The upper base 2 is composed of a single magnetically permeable material, and has a top wall 2a whose top surface is substantially in the same plane, a side wall 2b perpendicular to the top surface, an empty space formed by the inner surface of the top wall 2a and the inner peripheral surface of the side wall. The cavity 2c and the plurality of cores 2d formed integrally with the top wall 2a and projecting into the cavity 2c perpendicular to the top surface.

In the present embodiment, the top surface of the top wall 2a has a rectangular shape and is a working surface for sucking the workpiece 6 to be processed. The thickness t of the top wall 2a is preferably set to 0.1 mm - 5 mm, for example, 0.1 mm, 2.5 mm or 5 mm. The number of the iron cores 2d is determined according to actual needs. In the present embodiment, four, but not limited to four, are formed in a rectangular parallelepiped shape. A region corresponding to the core 2d on the top surface of the top wall 2a forms a magnetic pole 5.

The lower base 3 is made of a magnetically permeable material. The magnetic assembly 4 includes a reversible magnet 4a disposed adjacent to the core 2d directly under the core 2d and an exciting coil 4b disposed around the periphery of the reversible magnet 4a. The reversible magnet 4a may be selected from a reversible magnet such as an alnico magnet.

The lower base 3, the reversible magnet 4a and the iron core 2d can be fixedly connected by screws, specifically, the bottom of each iron core 2d Each of the portions is provided with a threaded hole that cooperates with the screw, and each of the lower base 3 and the reversible magnet 4a is provided with a through hole through which the plurality of screws pass through the lower base 3 and the reversible magnet 4a from the bottom of the lower base 3, respectively. The iron core 2d is screwed in, thereby fixedly connecting the lower base 3, the reversible magnet 4a and the iron core 2d.

The area corresponding to the core 2d on the top surface of the top wall 2a is provided with an identification of the magnetic pole 5. For example, a mark may be formed on the top surface of the top wall 2a for marking, or a region corresponding to the core 2d on the top surface of the top wall 2a may be slightly convexly identified.

The lower base 3 may be provided with a pouring hole (not shown) for pouring a non-magnetic material into the cavity 2c of the upper base 2. The non-magnetic material may be made of an epoxy resin or the like to fix the coil and the magnetic material in the cavity 2c, and to seal, insulate and increase rigidity.

As shown in Figs. 2a, 2b and 2c, the exciting coil 4b is energized by an instantaneous current, and the reversible magnet 4a is excited, and the upper and lower sides are N_S poles. After the adjacent reversible magnets 4a are excited, the upper and lower sides are S_N poles, so that the reversible magnets 4a and adjacent ones are adjacent. A magnetic circuit as shown in Fig. 2a is formed between the reversible magnet 4a, the core 2d, the top wall 2a, the lower base 3, and the workpiece 6. Thereby, the magnetic leakage type magnetic chuck 1 is magnetically externally, and the workpiece 6 to be processed is held on the top surface of the top wall 2a.

Figure 3a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention taken along line A-A of Figure 1 in a demagnetized state; Figure 3b shows a magnetic flux leakage type magnetic chuck 1 according to a first embodiment of the present invention. Top view in demagnetized state.

As shown in Figs. 3a and 3b, the exciting coil 4b gradually attenuates the current by the oscillation, the reversible magnet 4a is gradually demagnetized, and the magnetic leakage type magnetic chuck 1 is rendered non-magnetic, and the workpiece 6 to be processed is held on the top surface of the top wall 2a. Was released.

4a-4c show the assembly process of the magnetic flux leakage type magnetic chuck 1 according to the first embodiment of the present invention. The following three steps are included: 1. The reversible magnet 4a is arranged according to the threaded hole at the bottom of the iron core 2d of the upper base 2 as shown in Fig. 4a _; 2. The excitation coil 4b is disposed around the periphery of the reversible magnet 4a as shown in Fig. 4b, and connected Line; 3, as shown in Figure 4c, the lower base 3 is tightly attached The counter magnet 4a is screwed from the bottom of the lower base 3 through the lower base 3 and the reversible magnet 4a and screwed into the core 2d, thereby fixedly connecting the lower base 3, the reversible magnet 4a and the core 2d. The upper base 2 and the lower base 3 are fixed by screws, and a proper sealing process is performed on the contact portions of the upper base 2 and the lower base 3, and the epoxy resin is poured through the casting hole to the magnetic leakage type magnetic chuck 1 in.

According to the magnetic flux leakage type magnetic chuck 1 of the first embodiment of the present invention, since the top surface of the upper base 2 is composed of a single material, when the ambient temperature changes, the gap caused by the inconsistent thermal expansion and contraction coefficient is not caused. Therefore, the coolant and the magnetic conductive impurities used in the processing of the workpiece 6 do not penetrate or enter the inside of the magnetic leakage magnetic chuck 1, causing loss of internal insulation of the magnetic leakage magnetic chuck 1, thereby effectively improving the magnetic leakage type magnetic chuck 1 Service life. Although the top wall has a magnetic flux leakage region R due to the magnetic permeability of the top wall 2a, the magnetic flux leakage region R is located between any two of the plurality of cores 2d. However, since the thickness of the top wall 2a is relatively thin, the magnetic flux leakage has a small influence on the magnetic properties of the magnetic leakage type magnetic chuck 1 .

Moreover, since the top surface of the upper base 2 is substantially in the same plane, there is no groove for the spacer core 2d, and therefore, the magnetic conductive impurities during the processing of the workpiece 6 are not formed on the top surface of the upper base 2. The problem of an increase in the amount of magnetic flux leakage in the groove ensures the strength of the external magnetic force. Second embodiment

5 is a partial exploded perspective view of a magnetic flux leakage type magnetic chuck 1 according to a second embodiment of the present invention; FIG. 6a shows a magnetic flux leakage type magnetic chuck 1 according to a second embodiment of the present invention in a forward excitation state along the line of FIG. Fig. 6b is a partial enlarged view of Fig. 6a; Fig. 6c is a top view showing the magnetic flux leakage type magnetic chuck 1 according to the second embodiment of the present invention in a forward excited state. The magnetic flux leakage type magnetic chuck 1 according to the second embodiment of the present invention is a magnetic flux leakage type electric permanent magnet chuck.

The magnetic flux leakage type magnetic chuck 1 of the second embodiment is different from the magnetic flux leakage type magnetic chuck 1 of the first embodiment in that the magnetic assembly 4 further includes an irreversible magnet 4c provided around the core 2d. The irreversible magnet 4c may be a permanent magnet such as a neodymium iron boron magnet.

As shown in Figs. 6a, 6b and 6c, the exciting coil 4b is connected to the instantaneous current, and the reversible magnet 4a is excited in the forward direction, and the upper and lower sides are N-S poles. After the adjacent reversible magnets 4a are excited, the upper and lower sides are S-N poles, thereby Reversible magnet 4a, adjacent reversible magnet 4a, top wall 2a, iron core 2d, workpiece 6 and lower base 3, and in core 2d, irreversible magnet 4c, top wall 2a, side wall 2b and workpiece 6 Meanwhile, a magnetic circuit as shown in Fig. 6a is formed between the iron core 2d, the irreversible magnet 4c, the workpiece 6 and the top wall 2a. Thereby, the magnetic leakage type magnetic chuck 1 is magnetically externally, and the workpiece 6 to be processed is held on the top surface of the top wall 2a.

Figure 7a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the second embodiment of the present invention taken along line B-B of Figure 1 in a reverse excitation state; Figure 7b shows a magnetic flux leakage type magnetic chuck according to a second embodiment of the present invention. 1 Top view in the reverse excitation state.

As shown in Figs. 7a and 7b, the exciting coil 4b is connected to the instantaneous reverse current, and the reversible magnet 4a is reversely excited, and the upper and lower sides are S-N poles. After the adjacent reversible magnets 4a are excited, the upper and lower sides are N-S poles, thereby being reversible. The magnet 4a, the adjacent reversible magnet 4a, the irreversible magnet 4c, the iron core 2d, and the lower base 3 are formed between the reversible magnet 4a, the lower base 3, the side wall 2b, the irreversible magnet 4c, and the iron core 2d. Short circuit as shown in Figure 7a. Thereby, the magnetic leakage type magnetic chuck 1 is rendered non-magnetic to the outside, and the suction of the workpiece 6 to be processed on the top surface of the top wall 2a is released.

8a-8d show the assembly process of the magnetic flux leakage type magnetic chuck 1 according to the second embodiment of the present invention. The following three steps are included: 1. Install an irreversible magnet 4c around the core 2d as shown in Fig. 8a; 2. According to the upper base, as shown in Fig. 8b The threaded hole at the bottom of the iron core 2d of 2 is provided with a reversible magnet 4a _; 3. The excitation coil 4b is disposed around the periphery of the reversible magnet 4a as shown in Fig. 8c, and is connected to the line; 4. The lower base 3 is attached to the reversible magnet as shown in Fig. 8d. 4a, the lower base 3 and the reversible magnet 4a are screwed from the bottom of the lower base 3 and screwed into the iron core 2d, thereby fixedly connecting the lower base 3, the reversible magnet 4a and the iron core 2d. The upper base 2 and the lower base 3 are fixed by screws, and a proper sealing process is performed on the contact portions of the upper base 2 and the lower base 3, and the epoxy resin is poured through the casting hole to the magnetic leakage type magnetic chuck 1 in.

According to the magnetic flux leakage type magnetic chuck 1 of the second embodiment of the present invention, since the top surface of the upper base 2 is composed of a single material, when the ambient temperature changes, the gap caused by the inconsistent thermal expansion and contraction coefficient is not caused. Therefore, the coolant and the magnetic conductive impurities used in the processing of the workpiece 6 do not penetrate or enter the inside of the magnetic leakage magnetic chuck 1, causing loss of internal insulation of the magnetic leakage magnetic chuck 1, thereby effectively improving the magnetic leakage type magnetic chuck 1 Service life. Although the top wall 2a has a magnetic flux leakage region R due to the magnetic permeability of the top wall 2a, the magnetic flux leakage region R is located between any two of the plurality of cores 2d. However, since the thickness of the top wall 2a is relatively thin, such magnetic flux leakage has a relatively small influence on the magnetic properties of the magnetic leakage type magnetic chuck 1 .

Moreover, since the top surface of the upper base 2 is substantially in the same plane, there is no groove for the spacer core 2d, and therefore, the magnetic conductive impurities during the processing of the workpiece 6 are not formed on the top surface of the upper base 2. The problem of an increase in the amount of magnetic flux leakage in the groove ensures the strength of the external magnetic force. Third embodiment

Figure 9 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention; Figure 10a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention, along the line C_C of Figure 9 in an excited state. FIG. 10b is a partial enlarged view of FIG. 10a; FIG. 10c shows a magnetic flux leakage type magnetic chuck 1 according to a third embodiment of the present invention. FIG. 11a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the third embodiment of the present invention taken along line C_C of FIG. 9 in a demagnetized state; FIG. 1 ib shows magnetic flux leakage according to a third embodiment of the present invention. A top view of the magnetic chuck 1 in a demagnetized state.

The third embodiment is a modification of the first embodiment, and as shown in FIGS. 9-11, the magnetic flux leakage type magnetic chuck 1 of the third embodiment is different from the magnetic flux leakage type magnetic chuck 1 of the first embodiment in that the core The number of 2d is set to 2, which is in the shape of a rectangular parallelepiped. Fourth embodiment

Figure 12 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a fourth embodiment of the present invention; Figure 13a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a fourth embodiment of the present invention in the forward excitation state along the line of Figure 12 FIG. 13b is a partial enlarged view of FIG. 13a; FIG. 13c is a top view of the magnetic flux leakage magnetic chuck 1 according to the fourth embodiment of the present invention in a forward excited state; FIG. 14a shows a fourth according to the present invention. A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 of the embodiment in the reverse excitation state along the line D_D of FIG. 12; FIG. 14b is a top view of the magnetic flux leakage type magnetic chuck 1 according to the fourth embodiment of the present invention in the reverse excitation state. .

The fourth embodiment is a modification of the second embodiment. As shown in FIGS. 12-14, the magnetic flux leakage magnetic chuck 1 of the fourth embodiment differs from the magnetic leakage magnetic chuck 1 of the second embodiment in that the iron core The number of 2d is set to 2, which is in the shape of a rectangular parallelepiped. Fifth embodiment

Figure 15 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a fifth embodiment of the present invention; A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the fifth embodiment of the present invention along the line E_E of FIG. 1 in an excited state; FIG. 16b is a partial enlarged view of FIG. 16a; and FIG. 16c shows a leak according to a fifth embodiment of the present invention. FIG. 17a is a cross-sectional view of the magnetic magnetic chuck 1 according to the fifth embodiment of the present invention taken along line E-E of FIG. 15 in a demagnetized state; FIG. 17b is a view showing the magnetic magnetic chuck 1 according to the fifth embodiment of the present invention; A top view of the magnetic flux leakage type magnetic chuck 1 of the fifth embodiment in a demagnetized state;

The fifth embodiment is a modification of the first embodiment. As shown in FIGS. 15-17, the magnetic flux leakage type magnetic chuck 1 of the fifth embodiment differs from the magnetic flux leakage type magnetic chuck 1 of the first embodiment in that a fifth The magnetic flux leakage magnetic chuck 1 of the embodiment has a cylindrical shape, and the top surface of the top wall 2a is circular, which can be used as a working surface for processing a circular ring workpiece, and the iron core 2d in the cavity 2c of the upper base 2 is fan-shaped evenly. The distribution, the number is set to 8, but not limited to 8, the core 2d has a trapezoidal cross section parallel to the top surface of the top wall 2a, and has a partition wall 2e between any two of the plurality of cores 2d, the partition wall 2e is integrally formed with the top wall 2a, extending downward from the top wall 2a to the upper surface of the lower base 3, and the partition wall 2e is also composed of a magnetically permeable material, as shown in Figs. 16a, 16b and 16c, the exciting coil 4b is instantaneously The forward current, all the reversible magnets 4a are positively excited, and both are N-S poles up and down, so that between the workpiece 6, the side wall 2b, the lower base 3, the top wall 2a, the reversible magnet 4a, and the iron core 2d and Workpiece 6, iron core 2d, reversible magnet 4a, top wall 2 a, between the lower base 3 and the partition wall 2e, a magnetic circuit as shown in FIG. 16a is formed, whereby the magnetic leakage type magnetic chuck 1 is magnetically externally, and the workpiece 6 to be processed is held on the top surface of the top wall 2a. on. Sixth embodiment

Figure 18 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention; and Figure 19a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention in the forward excitation state along the line of Figure 18 FIG. 1 is a partial enlarged view of FIG. 19a; FIG. 19c shows a magnetic flux leakage type magnetic chuck 1 according to a sixth embodiment of the present invention. FIG. 20a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the sixth embodiment of the present invention taken along the line F-F of FIG. 18 in the reverse excitation state; FIG. 20b is a view of the present invention. A top view of the magnetic flux leakage type magnetic chuck 1 of the sixth embodiment in a reverse excitation state.

The sixth embodiment is a modification of the second embodiment. As shown in FIGS. 18-20, the magnetic flux leakage type magnetic chuck 1 of the sixth embodiment is different from the magnetic flux leakage type magnetic chuck 1 of the second embodiment in that the sixth The magnetic flux leakage type magnetic chuck 1 of the embodiment has a cylindrical shape, and the top surface of the top wall 2a has a circular shape, which can be used as a working surface for processing a circular ring workpiece, and the iron core 2d in the cavity 3c of the upper base 2 is fan-shaped evenly. The distribution, the number is set to 8, but not limited to 8, the core 2d has a trapezoidal cross section parallel to the top surface of the top wall 2a, and has a partition wall 2e between any two of the plurality of cores 2d, the partition wall 2e is integrally formed with the top wall 2a, extending downward from the top wall 2a to the upper surface of the lower base 3, and the partition wall 2e is also composed of a magnetically permeable material, as shown in Figs. 19a, 19b and 19c, the exciting coil 4b is instantaneously Forward current, all of the reversible magnets 4a are positively excited, and both are N-S poles up and down between the workpiece 6, the side wall 2b, the lower base 3, the top wall 2a, the reversible magnet 4a, and the iron core 2d, and In the workpiece 6, the iron core 2d, the reversible magnet 4a, the top wall 2a, the lower base 3, and the partition wall 2e And between the workpiece 6, the side wall 2b, the top wall 2a, the irreversible magnet 4c, and the iron core 2d, and between the workpiece 6, the partition wall 2e, the top wall 2a, the irreversible magnet 4c, and the iron core 2d, as shown in Fig. 19a The magnetic circuit is shown, whereby the magnetic leakage magnetic chuck 1 is magnetically externally, and the workpiece 6 to be processed is held on the top surface of the top wall 2a. As shown in Figs. 20a and 20b, the exciting coil 4b is instantaneously reversed. The current, all of the reversible magnets 4a are reversely excited, and both are upper and lower S_N poles, so that between the side wall 2b, the lower base 3, the reversible magnet 4a, the iron core 2d, and the irreversible magnet 4c, and the core 2d, reversible A short circuit as shown in Fig. 20a is formed between the magnet 4a, the lower base 3, the partition 2e, and the irreversible magnet 4c. Thereby, the magnetic leakage type magnetic chuck 1 is rendered non-magnetic to the outside, and the suction of the workpiece 6 to be processed on the top surface of the top wall 2a is released. Seventh embodiment

21 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a seventh embodiment of the present invention; and FIG. 22a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a seventh embodiment of the present invention, which is along the line G_G of FIG. 21 in an excited state. Figure 22b is a partial enlarged view of Figure 22a; Figure 22c is a top view of the magnetic flux leakage type magnetic chuck 1 according to a seventh embodiment of the present invention in an excited state; Figure 23a shows a leak according to a seventh embodiment of the present invention A cross-sectional view of the magnetic magnetic chuck 1 along the line G-G in Fig. 21 in a demagnetized state; Fig. 23b is a top view showing the magnetic flux leakage type magnetic chuck 1 in a demagnetized state according to a seventh embodiment of the present invention.

The seventh embodiment is a modification of the fifth embodiment. As shown in FIGS. 21-23, the magnetic flux leakage type magnetic chuck 1 of the seventh embodiment is different from the magnetic flux leakage type magnetic chuck 1 of the fifth embodiment in that the seventh The iron core 2d of the magnetic flux leakage type magnetic chuck 1 of the embodiment has a rectangular cross section parallel to the top surface of the top wall 2a. Eighth embodiment

Figure 24 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to an eighth embodiment of the present invention; Figure 25a is a view showing a magnetic flux leakage type magnetic chuck 1 according to an eighth embodiment of the present invention in a forward excitation state along the line of Figure 24 FIG. 25b is a partial enlarged view of FIG. 25a; FIG. 25c is a top view of the magnetic flux leakage type magnetic chuck 1 according to the eighth embodiment of the present invention in a forward excited state; A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 of the eighth embodiment taken along the line H-H of FIG. 24 in the reverse excitation state; and FIG. 26b shows the magnetic field of the magnetic leakage type magnetic chuck 1 according to the eighth embodiment of the present invention in the reverse excitation state. Top view under.

The eighth embodiment is a modification of the sixth embodiment. As shown in FIGS. 24-26, the magnetic flux leakage type magnetic chuck 1 of the eighth embodiment differs from the magnetic flux leakage type magnetic chuck 1 of the sixth embodiment in that the eighth Magnetic leakage magnetic chuck of the embodiment A cross section parallel to the top surface of the top wall 2a of the iron core 2d of 1 is rectangular. Ninth embodiment

Figure 27 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a ninth embodiment of the present invention. Figure 28a shows a magnetic flux leakage type magnetic chuck 1 according to a ninth embodiment of the present invention, along the line I of Figure 27 in an excited state. FIG. 28b is a partial enlarged view of FIG. 28a; FIG. 28c is a top view of the magnetic flux leakage type magnetic chuck 1 according to the ninth embodiment of the present invention in an excited state; and FIG. 29a shows a ninth embodiment according to the present invention. A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 in the demagnetized state along the line I-I of Fig. 27; Fig. 2% shows a top view of the magnetic flux leakage type magnetic chuck 1 according to the ninth embodiment of the present invention in a demagnetized state.

The ninth embodiment is a modification of the third embodiment. As shown in FIGS. 27-29, the magnetic flux leakage type magnetic chuck 1 of the ninth embodiment differs from the magnetic flux leakage type magnetic chuck 1 of the third embodiment in that the ninth The magnetic flux leakage magnetic chuck 1 of the embodiment is a magnetic flux leakage electromagnetic chuck, that is, in the ninth embodiment, the magnetic core 2d is directly extended to the upper surface of the lower base 3, and the exciting coil 4b surrounds the iron core. 2d peripheral settings. The magnetic component 4 includes an exciting coil 4b disposed around the periphery of the core 2d. When a continuous direct current is passed through the exciting coil 4b, the iron core generates a magnetic flux to form a magnetic circuit as shown in Fig. 28a, and the suction cup displays magneticity externally. When the current in the exciting coil 4b stops, the magnetic flux of the iron core disappears, and the suction cup does not externally. Display magnetic. Tenth embodiment

Figure 30 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to a tenth embodiment of the present invention; Figure 31a is a view showing a magnetic flux leakage type magnetic chuck 1 according to a tenth embodiment of the present invention along the line J_J of Figure 30 in an excited state. FIG. 31b is a partial enlarged view of FIG. 31a; FIG. 31c shows a magnetic flux leakage type magnetic chuck 1 according to a tenth embodiment of the present invention. FIG. 32a is a cross-sectional view of the magnetic flux leakage type magnetic chuck 1 according to the tenth embodiment of the present invention taken along line J-J of FIG. 30 in the demagnetized state; FIG. 32b shows a leak according to the tenth embodiment of the present invention. A top view of the magnetic magnetic chuck 1 in a demagnetized state.

The tenth embodiment is a modification of the fifth embodiment. As shown in FIGS. 30-32b, the magnetic flux leakage type magnetic chuck 1 of the tenth embodiment is different from the magnetic flux leakage type magnetic chuck 1 of the fifth embodiment in that the tenth The magnetic flux leakage magnetic chuck 1 of the embodiment is a magnetic flux leakage electromagnetic chuck, that is, in the tenth embodiment, the magnetic core 2d is directly extended to the upper surface of the lower base 3, and the exciting coil 4b surrounds the iron core. 2d peripheral settings. The magnetic component 4 includes an exciting coil 4b disposed around the periphery of the core 2d. When a continuous direct current is passed through the exciting coil 4b, the iron core generates a magnetic flux to form a magnetic circuit as shown in FIG. 31a, and the suction cup displays magneticity externally. When the current in the exciting coil 4b stops, the magnetic flux of the iron core disappears, and the suction cup does not externally. Display magnetic. Eleventh embodiment

Figure 33 is a partially exploded perspective view showing a magnetic flux leakage type magnetic chuck 1 according to an eleventh embodiment of the present invention; Figure 34a is a view showing a magnetic flux leakage type magnetic chuck 1 according to an eleventh embodiment of the present invention, which is along the line of Figure 33 in an excited state. Figure 34b is a partial enlarged view of Figure 34a; Figure 34c is a top view of the magnetic flux leakage type magnetic chuck 1 according to the eleventh embodiment of the present invention in an excited state; Figure 35a shows the first aspect of the present invention A cross-sectional view of the magnetic flux leakage type magnetic chuck 1 of the eleventh embodiment in a demagnetized state along the line K-K in Fig. 33; Fig. 35b shows the top of the magnetic flux leakage type magnetic chuck 1 in the demagnetized state according to the eleventh embodiment of the present invention. view.

The eleventh embodiment is a modification of the seventh embodiment. As shown in FIGS. 33-35b, the magnetic flux leakage type magnetic chuck 1 of the eleventh embodiment differs from the magnetic flux leakage type magnetic chuck 1 of the seventh embodiment in that The magnetic flux leakage magnetic chuck 1 of the eleventh embodiment is a magnetic flux leakage electromagnetic chuck, that is, in the eleventh embodiment, the reversible magnet 4a is not provided, and the iron core 2d is directly extended. The upper surface of the lower base 3 is provided, and the exciting coil 4b is disposed around the circumference of the iron core 2d. The magnetic assembly 4 includes an exciting coil 4b disposed around the periphery of the core 2d. When a continuous direct current is passed through the exciting coil 4b, the iron core generates a magnetic flux to form a magnetic circuit as shown in Fig. 34a, and the suction cup displays magneticity externally. When the current in the exciting coil 4b stops, the magnetic flux of the iron core disappears, and the suction cup does not externally. Display magnetic.

The above description is an example of a specific embodiment of the present invention, and is used to more clearly illustrate the novel concept of the present invention, and is not intended to limit the scope of the claims. A person skilled in the art can easily change, modify, combine the embodiments, and contemplate other embodiments within the scope of the above-described embodiments. These changes, modifications, and combinations are included in the claims appended to the present invention. Within the scope of.

Claims

Claim

A magnetic leakage magnetic chuck (1) comprising an upper base (2), a lower base (3) and a magnetic component (4), characterized in that the upper base (2) is guided by a single magnet Material composition, and having a top wall with the top surface substantially in the same plane

(2a), a side wall (2b) perpendicular to the top surface, a cavity (2c) formed by the inner surface of the top wall (2a) and the inner peripheral surface of the side wall (2b), and the top wall (2a) A plurality of uniformly distributed cores (2d) are formed which protrude perpendicularly to the top surface into the cavity (2c).

The magnetic leakage magnetic field of claim 1 , wherein the top wall has a thickness of 0. 1-5 mm, the top wall has a magnetic flux leakage region (R), and the magnetic flux leakage region (R) ) is located between any two of the plurality of cores (2d).

The magnetic flux leakage magnetic chuck according to claim 2, wherein the magnetic component (4) comprises a reversible magnet disposed under the iron core (2d) to abut the iron core (2d) (4a) and an exciting coil (4b) disposed around the periphery of the reversible magnet (4a).

The magnetic flux leakage type magnetic chuck according to claim 3, wherein the magnetic component (4) further comprises an irreversible magnet (4c) provided around the core (2d).

The magnetic flux leakage magnetic chuck according to claim 4, wherein the lower base (3), the reversible magnet (4a) and the iron core (3d) are connected by screws.

The magnetic flux leakage type magnetic chuck according to claim 5, wherein a mark of the identification magnetic pole (5) is provided on a top surface of the top wall (2a) corresponding to the iron core (2d).

The magnetic flux leakage magnetic chuck according to claim 2, wherein the magnetic component (4) comprises an exciting coil (4b) disposed around a periphery of the iron core (2d).

The magnetic flux leakage type magnetic chuck according to any one of claims 1 to 7, wherein the lower base (3) is provided with a non-magnetic material cast into the cavity (2c). Casting hole (6).