KR100253917B1 - Magnet chuck - Google Patents

Abstract

PURPOSE: A magnet chuck is provided to improve adsorption efficiency of workpieces by increasing strength and density of a magnetic force generated from a core at all over an electromagnet. CONSTITUTION: A coil(7) is wound on a core(5), and the core is fixed on a table of a machining center via a strut core. By using the magnetic force generated from the core, a workpiece is fixed. The core is formed in the shape of a rectangular hexahedron, and many cores are stood spacing apart from each other. A fixing body(9) is formed between the cores by molding-injection of synthetic resin for fixation of the coil. Upper and lower faces of the core are exposed in the fixing body. While a magnet chuck is magnetically fixed on the table by application of electric currents, magnetic fixation of the workpiece is realized by placing the workpiece onto a specific portion of a workpiece fixing face(1) formed on the surface of the core. Therefore, proper processing of the workpiece is performed.

Description

Magnet chuck

The present invention relates to a magnet chuck applied to various machine tools to fix a workpiece by magnetic force. In particular, a plurality of cores constituting an electromagnet of the magnet chuck are utilized as the workpiece fixing surface and the table contact fixing surface of the machine tool. It is easy to manufacture as the structure, and each core has a uniform magnetic force independently, so that adsorption (self-adhesion) is carried out, the workpiece is secured and economical operation is possible due to the use of partial energization, The present invention relates to a magnet chuck that greatly improves ancillary functions according to the work conditions of the workpiece.

In general, a conventional magnet chuck, as shown in Figs. 1 and 2, the bed 100, which serves as a fixed surface of the workpiece, and the coil 204 in the inner core 202 while acting as a housing at the bottom of the bed The wound electromagnet 200 was combined with the main body. The magnet chuck is configured to transmit the magnetic force generated from the electromagnet 200 to the bed 100 during operation and thus to fix the workpiece on the upper part of the bed 100 to perform a predetermined machining operation. .

In this case, in the case of the bed 100, the installation hole 104 is formed in the magnetic metal plate 102 at a predetermined interval and the magnetic metal rod 106 is inserted into the installation hole, but the magnetic metal plate 102 and the magnetic metal rod ( 106) in the state in which the non-magnetic brass plate is fixedly installed in a state spaced apart from each other using a soldering method or adhesive, the combination of the bed 100 and the electromagnet 200 is a magnetic metal rods 106 of the electromagnet 100 The core core 202a is in contact with the magnetic metal plate 102 and the outer cores 202b and 202b so that the metal rod 106 and the metal plate 102 have different polarities from each other to fix the workpiece on the bed 100. It is configured to be.

However, since the conventional magnet chuck as described above has to separately form and combine the external core contacting the table of the machine tool with the bed on which the workpiece is placed separately in the electromagnet consisting of the core and the coil, the manufacturing is considerably performed. This was difficult and caused the price of the magnet chuck to rise.

In addition, the core constituting the electromagnet has an E-shape and a unitary uniform configuration, and in particular, the core (202a) in contact with the central core 202a in a 90-degree direction with respect to the magnetic metal rod 106 spaced at regular intervals. 204 is a structure wound around the central core 202a, the generation of the magnetic force line by the current conduction of the coil 204 occurs only in the longitudinal center portion of the magnetic metal bar, the magnetic flux density at both ends thereof is weak, The adsorption (self-adhesion) efficiency of the workpieces has decreased considerably, and even when only a part of the fixed surfaces of the workpieces of the electromagnets are used, magnetic force is generated over all of them, so that the utilization as a magnet chuck is not efficient.

Therefore, in order to increase the magnetic flux density at both ends of the magnetic metal rod 106, it is inevitable to increase the strength of the current while winding more coils 204, which in turn causes heat from the enlargement of the magnet chuck and the winding coil. Due to the high occurrence, the service life was inevitably shortened. In particular, the magnetic metal rod 106 and the non-magnetic brass plate has a defect in that the non-magnetic brass plate is blown out due to different thermal expansion coefficients, and thus the solder is dropped during long-term use.

Moreover, such a conventional magnet chuck (electromagnet) can be fixed only to a single side of the workpiece, its use range is extremely limited, and when the workpiece is processed at right angles or other angles, Since the fixing can be performed only by using the auxiliary device, the work of fixing the workpiece to the magnet chuck is quite cumbersome and the effort of the effort is excessive.

The present invention has been researched and developed to solve various problems of the conventional magnet chuck as described above, and an object of the present invention is to provide an outer core contacted and fixed on a table of a machine tool and a bed for fixing a work piece. It is attached to the table of the machine tool even if it is not formed separately, so that one or more workpieces can be attached and fixed stably, maximizing the functional efficiency of the magnet chuck, and energizing only the part to be used among the fixed surfaces of the electromagnet workpiece. It can be operated economically by making it operate, and the fixed work and the work work on the workpiece are done efficiently without any auxiliary device, so the convenience and workability are maximized and the thermal expansion is minimized when the part is energized by structural improvement. To provide a magnet chuck for precision machining .

An object of the present invention is to transform the core structure of the electromagnet into a single-piece winding structure to reinforce the strength and density of the magnetic force generated from the core over the whole of the electromagnet magnet magnet to improve the adsorption (self-adhesion) efficiency of the workpiece to the maximum In providing.

The object implementation of the present invention is to form a workpiece fixing surface of the magnet chuck at least one surface, the table contact fixing surface which is fixed in contact with the table of the machine tool together with the workpiece fixing surface is formed as an individual core surface By using an electromagnet, the cores can be achieved by individually winding each of the cores in the same direction with respect to their respective longitudinal directions so that the cores can be operated independently of each other.

1 is a perspective view showing a typical typical magnet chuck.

2 is a longitudinal cross-sectional view of FIG.

Figure 3 is an external perspective view showing a preferred example of the present invention.

4 is a partially cutaway cross-sectional view of FIG. 3.

5 is another embodiment of FIG.

Figure 6 is an external perspective view of the core applied to the preferred embodiment of the present invention.

7 is a longitudinal sectional view showing a modification of the present invention.

8 is a partially cutaway cross-sectional view of FIG. 7.

Figure 9 is another embodiment of Figure 8;

10 is an external perspective view of a core applied to a modification of the present invention.

Figure 11 is a partially cutaway cross-sectional view showing another modification of the present invention.

12 is another embodiment of FIG.

13 to 16 show various other examples according to the present invention.

Fig. 13 is a longitudinal sectional view showing that the core has an F-shape and a workpiece fixing surface on two sides is formed.

Fig. 14 is a longitudinal sectional view showing that the core has an E-shape in which three fixed workpieces are formed;

15 is a longitudinal cross-sectional view showing that one side of the core is inclined at a predetermined angle.

Figure 16 is a longitudinal cross-sectional view showing that the core is inclined for supplying a uniform magnetic force on each workpiece fixed surface when the workpiece fixed surface is formed as a multi-sided as shown in FIGS.

17 is a partially cutaway exploded perspective view of still another modification of the present invention.

18 is a partially cutaway exploded perspective view of still another modification of FIG. 17;

19 is an exploded perspective view of another modification of the present invention.

20 is a longitudinal sectional view in the engaged state of FIG. 19;

21 is a partially cutaway perspective view of still another modification of the present invention;

FIG. 22 is a partially cutaway perspective view of FIG. 21; FIG.

Fig. 23 is a partially cutaway perspective view of another modification of Fig. 21.

FIG. 24 is a partial cross-sectional excerpt longitudinal section of FIG. 23; FIG.

25 is a partially cutaway exploded perspective view showing another embodiment of the present invention.

FIG. 26 is a longitudinal sectional view in the engaged state of FIG. 25; FIG.

FIG. 27 is a partially cutaway cross sectional view of the coupled state of FIG. 25; FIG.

28 is a longitudinal sectional view of another embodiment of FIG. 26;

29 is a partially cutaway exploded perspective view showing another embodiment of the present invention.

30 is a partially cutaway cross-sectional view of the coupling state of FIG. 29;

FIG. 31 is a longitudinal sectional view in the engaged state of FIG. 29; FIG.

32 is a partially exploded perspective view showing another embodiment of the present invention.

33 is an exploded perspective view of a partially cut away in the coupled state of FIG.

34 is a longitudinal sectional view in the engaged state of FIG. 32;

35 is a partially cutaway bottom perspective view showing another embodiment of the present invention.

36 is a longitudinal sectional view of FIG. 35;

FIG. 37 is a longitudinal sectional view showing another embodiment of FIG. 35; FIG.

38 is a partially exploded perspective view showing another embodiment of the present invention.

39 is a longitudinal sectional view in the engaged state of FIG. 38;

40 is a partially cutaway cross-sectional view in the engaged state of FIG. 38;

41 is a partially cutaway perspective view showing yet another embodiment of the present invention.

FIG. 42 is a side cutaway longitudinal sectional view of FIG. 41; FIG.

* Explanation of symbols for main parts of the drawings

1: Workpiece fixing surface 1 ': Table contact fixing surface

5: core 7: coil

9: fixed body

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

That is, the present invention is provided in various embodiments to embody the above-mentioned objects. First, the present invention will be described with reference to the embodiments of FIGS. 1 to 10 as shown in the accompanying drawings.

As shown in Figs. 3 and 4, the coil 7 is wound around a core 5 having a predetermined shape, and the coil 5 on which the coil 7 is wound is supported by the core. A magnet chuck fixed to a table and formed to fix a workpiece by using a magnetic force generated from the core 5, wherein the core 5 is formed in a rectangular parallelepiped shape having a predetermined length horizontally and a plurality of them are erected. It is arranged spaced apart at a predetermined interval in the state, in order to fix the coil (7) between each of the core (5) a synthetic resin material of a non-magnetic material is molded injection to form a fixed body (9) of the core (5) Two sides, preferably the upper and lower surfaces, are molded injection molded so as to be exposed from the fixture 9.

As described above, after the molding is injected into the fixing body 9, a table contact fixing surface 1 'is formed on the upper and lower surfaces of the core 5 in contact with the workpiece fixing surface 1 and the table of the machine tool, respectively.

At this time, each of the cores 5 are configured to be movable for the independent magnetic force generation in the state in which the coils 7 are wound in the same direction with respect to the longitudinal direction and spaced apart from each other.

As shown in FIG. 4, the coils 7 are wrapped for each core 5 so as to be spaced apart from each other, or as shown in FIG. 5, the cores 5 are skipped one by one and the coils 7 are wrapped. The core 5 can be filled with a nonmagnetic material such as a fixture 9, and the core 5 of this embodiment is formed integrally as shown in FIG.

In addition, the shape of the core (5) can be formed of a plurality of parts combination as shown in the accompanying drawings, Figures 7 to 10, in this case, the stationary body (9) between the core (5) and the core (5) With a separate non-magnetic thin plate 52 can be interposed, the winding of the coil 7 of the core (5) can be in the state of each core, or one skipped as in the above 4 and 5 above.

On the other hand, Figure 11 and Figure 12 is another example of the present invention, each of which is completely independent of the table of the machine tool due to the generation of a partial magnetic force in the core (5), each of which is individually operated for the independent magnetic force generation It may occur when not adsorbed (self-adhesion), and this is to compensate for the risk that the magnet chuck is shaken during the processing of the workpiece, the bottom core of the core (5) a number of support cores of the same material ( By combining 5c), even if the distribution of the magnetic force is biased by the individual or partial motion of the core 5, the support core 5c is magnetized entirely and firmly self-holds with the table of the machine tool, thereby causing the magnetic Reliability is ensured against fixation force.

13 to 16 illustrate various modifications that can be manufactured using the above-described magnet chuck of the present invention, and the outer core 5b and the core 5 applied thereto are formed in a mutually coupled form. By varying the shape, the plurality of workpiece holding surfaces 1 are formed as acute or obtuse rather than at least one surface or at right angles, so that the workpiece holding surfaces 1 have a predetermined angle. Shows that it can.

"자 형상으로된 외측코아(5')를 구비하되, 외측코아(5')의 수직부(5b') 내측과 코아(5)의 상부면을 고정 결합하여 수평부(5a')와 수직부(5b')의 외측면에 각각 피가공물을 자력으로 고정할 수 있도록 한다.That is, as shown in Fig. 13, the horizontal portion 5a 'and the vertical portion 5b' are bent on the upper surface of the core 5 ".

"Horizontal core 5 'having a shape, but the horizontal portion 5a' and the vertical portion by fixing the inner surface of the vertical portion 5b 'and the upper surface of the core 5' Each of the workpieces on the outer surface of 5b 'can be fixed by magnetic force.

And, as shown in Figure 14, the upper surface of the core (5) has an inverted shape of the horizontal portion 6b and the outer core 6 consisting of a pair of vertical portions (6a, 6c), the outer core The inner side of the vertical portions 6a and 6c of 6 and the upper surface of the core 5 are fixedly coupled so that the horizontal portions 6b and both outer sides of the vertical portions 6a and 6c can respectively fix the workpiece by magnetic force. Make sure

That is, it shows that the work surface fixed to two or three sides which are orthogonal form is formed as the outer cores 5 'and 6 of F shape or E shape.

On the other hand, as shown in Fig. 15 shows that one side of the core 5 formed to form an inclined surface or a predetermined angle, the outer surface of the vertical portion (6a) and the outer surface of the horizontal portion (6b) The angle is formed to be inclined. At this time, the support core 5c may be formed as in the embodiment of FIGS. 11 and 12.

As described above, when the workpiece fixing surface 1 is formed in a multiple face, as shown in FIG. 16, the outer cores 5 'and 6 are predetermined so as to be in contact with the mutually bent portions of the workpiece fixing surfaces 1 at the same time. By inclining at an angle, it is possible to more uniformly maintain the distribution state of the magnetic force generated from the cores 5 transmitted on the workpieces 1 above.

On the other hand, the accompanying drawings, Figures 17 to 24 is another example of the present invention, the workpiece having a circular, round cross-sectional shape, which is very difficult to install fixed to the magnet chuck in the state where the workpiece fixing surface 1 is smooth, or An example is available for the workpiece with the plane bent.

That is, as shown in Figs. 17 and 18, the V-shaped transverse grooves 53 are formed in the orthogonal direction or in the longitudinal direction with respect to each core 5, but the finishing member 4 having the same shape and structure. When the workpiece having a circular or round cross section or a workpiece having a flat curved shape is separated, the finishing member 4 is separated so that the fixed surface 1 is formed in a V shape. Installation can be performed, and when the use of a flat magnet chuck can be used in combination with the finishing member (4).

19 and 20, through holes 51a are formed at the corresponding positions in the state where the screw holes 54 are drilled to one side of the core 5, and a magnetic metal rod ( 51) and the workpiece separation prevention member 6 made by alternating attachment and coupling of the non-magnetic thin plate 52 is provided separately, and the screw hole 54 and the through hole 51a coincide with each other and normal fastening By fastening and fastening with bolts, the workpiece separation prevention member 6 is selectively installed and installed on the core 5 to a workpiece having a circular or round cross-sectional shape or a workpiece in a curved state. Fixed installation work can be performed.

That is, on the outer surface of the core to which the workpiece is fixed, the workpiece separation prevention member made of the magnetic rod and the nonmagnetic thin plate alternately attached to each other is assembled and detachably installed.

In addition, as shown in FIGS. 21 and 22, the groove 55 is formed at one side of the core 5, and in a state in which the lifting and lowering members 8 having a rectangular cross section having a shape matching the same are provided separately, Spring insertion grooves 55a and 8a are respectively formed on the mutually opposing surfaces of the recess 55 and the lifting and lowering member 8, and springs 8b are interposed in each of the spring insertion grooves 55a and 8a. The lifting and lowering member 8 maintains the raised state by the spring force of the spring 8b, unless the load is applied to the workpiece, and the workpiece having the circular or round cross-sectional shape or the curved surface is bent. Can be fixed and processed on the workpiece.

23 and 24 are modified examples of FIGS. 21 and 22 except that the grooves 55 are formed in the full length direction of the core 5, and the lifting and lowering members 8 'of circular cross-sections corresponding to the grooves are formed. ) Is formed to be elastically installed by the spring (8b) is formed to form the spring insertion groove (55a) (8a).

On the other hand, Figures 25 to 27 is another embodiment of the present invention, each of the core (5) one by one while the coil (7) is wound around the housing (5e) and the support core (5c) with a fastening bolt mutually It is assembled, but the inside is configured by filling a non-magnetic material such as a fixed body (9), in this embodiment Figure 28 is to increase the winding workability of the coil (7) when the length of the core (5) is long In order to equalize the core (5) and winding the coil (7) in each.

That is, horizontal cores 54 each of which the workpiece is fixed to the top surface of the core are fixedly fixed in the horizontal direction, coils are wound around the core one by one, and the cores and the horizontal cores are accommodated by the housing.

29 to 31 are integrally formed by repeating the core 5 of the electromagnet 3 in an E shape, the core 5 around which the coil 7 is wound is equally divided as in the embodiment of FIG. 27. Coil 7 is wound around each. At this time, the magnetic rod 51 and the non-magnetic thin plate 52 is composed of two units each consisting of an alternating close contact with the fastening bolt 53 and the connecting pin 54 of the non-magnetic material in sequence. .

That is, a plate-shaped core 55 having a single flat plate connected to each other is fixedly coupled to the lower surface of the core, and the coil is wound around the core one by one, and a magnetic rod and a nonmagnetic plate are formed on the upper surface of the core. Units are made of two non-magnetic fastening bolts and connecting pins sequentially coupled to each other in this state of being in close contact with each other.

32 to 40 are views showing various embodiments for increasing magnetic flux density (generating magnetic strength) when the workpiece fixing surface 1 is formed at two right angles as another embodiment of the present invention. 32 to 34 show that the magnetic metal rods 51 and the non-magnetic thin plates 52 having a right angle are combined with a conventional fastening bolt, and are repeatedly formed in an E-shape on the horizontal and vertical planes thereof, respectively, to be integrally formed with a core ( 5) is skipped one by one to wind the coil (7) to form an electromagnet (3) and filled with a nonmagnetic material such as a fixture (9) around it.

That is, the vertical core 55 having a predetermined length adjacent to the plate-shaped core 54 is fixedly arranged, the plurality of side cores to be perpendicular to the core on the outer surface of the vertical core corresponding to the opposite side of the plate-shaped core 54 (56) is integrally formed, the coils are wound one by one to the side core is wound, the fixture is molded between the side cores, and the two sides perpendicular to the upper surface of the core and the outer surface of the side core. Magnetic metal and non-magnetic plate having a fixed is installed.

35 and 36 form a core 5 perpendicular to each lower portion of each of the magnetic metal rods 51 as in the embodiment of FIG. 32 and skip the coils 7 one by one. Winding in a rectangular shape of the same shape as)) to form an electromagnet (3), the magnetic bearing core 5c in the form of a block is combined and the fixing body 9 is filled between each core (5). At this time, the right angled core 5 may be divided as shown in FIG. 37 to wind the coil 7 for convenience of winding the coil 7.

That is, one end of the core is bent vertically bent core 57 is fixedly coupled, the coil is wound around the core and the bending core one by one, the coil is wound, vertical to the outer surface of the core and bending core The bent magnetic rod and the nonmagnetic thin plate are fixedly coupled to each other in alternating state, and are arranged and coupled to the support core in the bent inner space of the core and the bending core.

In addition, FIGS. 38 to 40 process and form a core 5 of right angles at regular intervals in a rectangular parallelepiped having a lateral length corresponding to the lower rectangular surface of the assembled magnetic metal rod 51 and the nonmagnetic thin plate 52. The coil 7 is wound in a rectangular shape having the same shape as the core, and the fixing body 9 is filled between the cores 5.

That is, the lower surface of the core has a single plate-shaped core 58 is fixedly coupled to each other, and the one side of the core and the plate-shaped core is a single plate-shaped side core 59 is fixedly coupled The coil is wound around the core one by one, and the magnetic rod and the nonmagnetic thin plate which are bent perpendicularly to the two sides of the core except for the surface where the plate-shaped core and the side core are coupled to each other are fixed to be in close contact with each other. To be combined.

41 and 42 are still another embodiment of the present invention, in which the electromagnet 3 is formed such that the workpiece fixing surface 1 is formed on the surface of the core 5 itself in a state in which it is spaced apart from each other in one vertical plane. It is formed by forming the support core 5c of the magnetic material at the lower part and filling the fixture 9, which is fixed to the support core 5c as necessary in the bed 100 of the existing magnet chuck or the magnet chuck of the present invention. Adsorption) to be used.

That is, the fixing body is molded so that both sides of the core are exposed, and molded to protrude a predetermined distance from the core to be in contact with a bed of a normal magnet chuck, and the support core is interposed inside the fixing body which is in contact with the bed. To fix the core and the fixture by the magnetic force of the bed.

Such an embodiment may be fixed to the workpiece having a circular, round cross-sectional shape or the workpiece in a flat curved state as in the embodiment of Figure 19 to Figure 24 can be carried out machining.

In the drawing, 5d denotes an indicator that can be externally checked whether the core 5 is operated.

Next, the operation of the present invention will be described.

In order to first magnetize the magnet chuck to the machine tool, the magnet chuck of the present invention is brought into contact with the table of the machine tool for processing the workpiece, and the electromagnet is formed by the core 5 and the coil 7. Is achieved by. At this time, the table contact fixing surface 1 'formed as the surface of the core 5 itself becomes magnetic due to the generated magnetic force, so that it is usually made of a magnetic material such as a metal without the provision of a separate outer core for self-installation to a machine tool. The magnetic chuck is stably fixed on the table of the machine tool, and the installation of the magnet chuck is completed.

On the other hand, in the state where electricity is supplied and the magnet chuck is fixedly fixed on the table of the machine tool, the workpiece to be machined is seated at a predetermined position on the workpiece fixing surface 1 formed as the surface of the core 5 itself. The self-fixing is performed, and then the appropriate work is performed on the workpiece fixed on the magnet chuck using a workbench of a machine tool.

In this case, the cores 5 are individually wound in the same direction with respect to the respective longitudinal direction, so that the workpiece fixing surface 1 is formed as a uniform magnetic force distribution over the entire longitudinal direction. It is a structure that maximizes the use efficiency of the magnet chuck by stably self-fixing and fixing the workpiece as the surface of the core 5 itself without the provision of a separate member such as a bed for self-supporting, so that the manufacturing cost can be lowered. do.

In addition, the cores 5 generating magnetic force to fix the workpieces are each independently movable, so that only a portion of the cores 5 on which the workpieces are installed are electrically energized. It reduces power consumption and improves power saving effect, which makes it possible to operate the magnet chuck economically and has less thermal expansion. At this time, in order to check whether the core 5 is operated, the magnetic force is generated by visually confirming through an indicator 5d such as an LED or an optical fiber which is electrically connected to the core 5 and protrudes to the outside. The workpiece can be placed in the core part 5, and the fixed work for the workpiece is made by adding or subtracting the magnetic force generating part by increasing or decreasing the energization part of the core 5 according to the size and shape change of the workpiece. It can be done perfectly.

In particular, the core 5 constituting one electromagnet 3, each of which generates magnetic force by independent operation, has the workpiece fixed surface 1 formed in a multi-faceted manner as mentioned in the above-described various embodiments. Since each side may be configured to maintain the angle at a predetermined angle, it is possible to selectively utilize a plane, a right angle, and 45 ° according to the shape of the workpiece when fixing the workpiece.

In addition, when a workpiece having a circular cross section or a round cross section or a workpiece having a flat curved surface is to be fixed, the V-shape is formed on one surface of the core 5 as shown in FIGS. 17 to 24, respectively. By forming the lateral groove 53, the workpiece fixing surface 1 is formed in a V shape, or by alternating coupling of the magnetic metal rod 51 and the nonmagnetic thin plate 52 on the upper portion of the workpiece fixing surface 1. V-type workpiece holding surface formed by selectively detaching the workpiece-preventing member 6 formed or by raising or lowering the members 8, 8 'by the spring force 8b. 1), a right angle formed by the orthogonal installation of the workpiece fixing surface 1 and the release preventing member 6, and the lifting and lowering members 8, 8 'and the like raised from the workpiece fixing surface 1; 2 parts for workpieces with round or round cross-sections and curved surfaces Standing and can be grounded, the magnetic force is transmitted in this state to a work piece that is securely fixed is, maintain a stable fixing state without departing of the position of the workpiece is cut off or shaking during the processing operation by the grinding as true.

At this time, after the fixing operation is performed on the workpiece in the cylindrical or round shape or the curved surface in the same manner as described above and the machining is completed, as shown in Figs. ) Is provided with a finishing member (4) having the same shape and structure separately) to be installed on the V-shaped horizontal groove (53), or to fix the workpiece to prevent the separation prevention member (6) shown in Figs. The lifting and lowering members (8) and (8 ') are separated from the surface (1) or by seating the workpiece on the upper and lowering members (8) and (8') shown in Figs. By lowering the resilience force of 8b), the workpiece fixing surface 1 can be smoothed to allow the fixed installation work to be performed on other general workpieces.

On the other hand, Figures 32 to 40 is to enable the utilization of the two surfaces of the workpiece fixed surface 1 is flat or right angle when fixed to the workpiece, uniform magnetic force in the vertical, horizontal plane formed by the core (5) The coil 7 is wound around the core 5 for distribution to improve the efficiency of the magnet chuck. FIGS. 41 and 42 show a bed of an existing magnet chuck by a support core 5c of a magnetic material formed at a lower portion thereof. 100) or the magnetic chuck fixed to the present invention can be utilized as in the above-described embodiment of Figures 19 and 20, in particular, it is possible to use the magnetic fastening and separation by electric current without the need for a separate fastening means.

As described above, the present invention is precisely self-fixed and fixed to the table of the machine tool even when the bed for fixing the workpiece and the outer core contacted on the table of the machine tool are not separately formed. It can be stably fixed and can be processed, and only the part of the work surface of the electromagnet to be used is energized so that it can be operated easily, and it is easy to manufacture and efficient to fix and process the work. It has several advantages, such as being able to operate.

Claims (14)

A magnet configured to wind a coil on a core having a predetermined shape, fix the coil wound around the core to a table of a machine tool through a support core, and fix a workpiece by using a magnetic force generated in the core. In the chuck, the cores are formed in a rectangular parallelepiped shape having a predetermined length in the horizontal direction, and are arranged to be spaced apart by a predetermined interval in a standing state, and a synthetic resin material, which is a nonmagnetic material, is molded to fix a coil between each of the cores. And forming a fixture, wherein the two surfaces of the core are molded and exposed so as to be exposed from the fixture. The method of claim 1, wherein a horizontal portion and a vertical portion are bent on the top surface of the core.

"It has an outer core in the shape of a, but fixedly coupled to the inner surface of the vertical portion of the outer core and the top of the core to be able to magnetically fix the workpiece to the outer surface of the horizontal portion and the vertical portion, respectively A magnet chuck characterized by. According to claim 1, wherein the upper surface of the core having an inverted shape of the inverted-shaped horizontal portion and a pair of vertical cores, wherein the inner side of the vertical portion of the outer core and the upper surface of the core fixedly coupled Magnets on both sides of the horizontal portion and the vertical portion to fix the workpiece by magnetic force. The magnet chuck of claim 2, wherein the outer surface of the vertical portion is formed to be inclined at a predetermined angle with the outer surface of the horizontal portion. The magnet chuck of claim 1, wherein at least one V-shaped groove is formed on an outer surface of the core to which the workpiece is fixed. 6. The magnet chuck of claim 5, wherein a closing member having the same shape and structure is detachably coupled to the lateral groove. 2. The magnet chuck according to claim 1, wherein a workpiece separation prevention member made of a magnetic rod and a nonmagnetic plate is alternately attached to each other on an outer surface of the core on which the workpiece is fixed. . The method of claim 1, wherein a groove having a predetermined depth is formed in the longitudinal direction on the outer surface of the core to which the workpiece is fixed, and the elevating member is installed in the groove so as to be elastically supported by a spring. Magnet chuck. The core of claim 1, wherein horizontal cores each of which the workpiece is to be fixed are fixedly coupled in a horizontal direction, and the coils are wound one by one on the cores, and the cores and the horizontal cores are accommodated by a housing. Magnet chuck, characterized in that coupled to. The core of claim 1, wherein a plate-shaped core having a single flat plate connected to each other is fixedly coupled to the lower surface of the core, and the coil is wound around the core one by one, and a magnetic rod and a nonmagnetic material are formed on the upper surface of the core. Magnet chuck, characterized in that the unit is made of two non-magnetic fastening bolts and connecting pins in sequence in the state that the thin plates are alternately in close contact with each other. The vertical core of claim 10, wherein a vertical core having a predetermined length is fixedly disposed adjacent to the plate-shaped core, and a plurality of side cores are integrated on the outer surface of the vertical core corresponding to the opposite side of the plate-shaped core so as to be perpendicular to the core. A coil is wound around the side core, and a fixture is molded between the side cores, and a magnetic metal and a non-magnetic metal having two sides perpendicular to the top surface of the core and the outer side of the side cores. Magnetic plate characterized in that the adult thin plate is fixed. According to claim 1, wherein one end of the core is bent vertically bent core is fixedly coupled, the coil is wound around the core and the bending core one by one coil is wound, perpendicular to the outer surface of the core and bending core The magnetic chuck and the non-magnetic plate bent to each other is fixedly coupled in alternating close contact, the magnet chuck, characterized in that the support core is disposed and coupled to the bent inner space of the core and the bending core. According to claim 1, The lower surface of the core is a plate-like core of a single plate-shape connected to each other is fixedly coupled, One side of the core and the plate-shaped core is fixed to the side plate core of a single plate shape, A coil is wound around the core one by one, and the magnetic rod and the nonmagnetic thin plate which are bent perpendicularly to the two sides of the core except for the surface where the plate-shaped core and the side core are coupled to each other are fixedly coupled in an alternate state. Magnet chuck, characterized in that. The method of claim 1, wherein the fixing body is molded so that both sides of the core is exposed, molded to protrude a predetermined distance from the core is in contact with the bed of the normal magnet chuck, the inside of the fixing body in contact with the bed A magnet chuck characterized in that the core is interposed to fix the core and the fixture by the magnetic force of the bed.

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