JP2018176358A - Terminal structure of ferromagnet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to suppress a maximum magnetic flux density without lowering average magnetic flux radiated from a body surface, and to remove iron dusts and cut dusts by a waste cloth or an air gun.SOLUTION: This terminal structure comprises: a housing 42, 52, 62 comprising a diamagnetic substance or a non-magnetic substance which is provided around a ferromagnet 41, 51, 61 which is accommodated in a body such as a block body 34 or the like formed from a ferromagnetic metal; a diffuser 43, 53, 63 which is laminated on an end part in a lengthwise direction of an NS magnetic pole of the ferromagnet 41, 51, 61, has prescribed thickness and area or more, and comprises a magnetic substance; and an arrester 46 which is located on a side opposite to the ferromagnet 41, 51, 61 of the diffuser 43, 53, 63, has prescribed thickness and area or more, and comprises a diamagnetic substance or a non-magnetic substance.SELECTED DRAWING: Figure 12

Description

  The present invention is used in a precision vise block or the like used in a precision vise for accurately attaching a workpiece to a machine tool, and in particular, the mounting state is stable even when machining with the machine tool of the workpiece Relates to the terminal structure of the ferromagnetic body (permanent magnet).

Conventionally, when machining a workpiece with a machine tool, the workpiece is mounted on the table surface of the machine tool, or a vise block is mounted on the table of the machine tool, and the workpiece is held or placed on the vise block. It is common to let it process. In addition, when processing parts that require precision, etc., a vise block whose flatness to hold the workpiece is secured with respect to the table surface of the machine tool is used, and the angle of the workpiece, the processing surface, etc. Accuracy has been maintained.
For example, FIG. 1 is a perspective view of a known precision vice, and FIG. 2 is a vertical sectional view of the center thereof.
In the figure, a holding block 12 and a holding block 13 having inner surfaces juxtaposed to both end sides of a base 11 constitute a vice body 10 by the base 11, the holding block 12 and the holding block 13. The inner surfaces of the holding block 12 and the holding block 13 are parallel to each other. The upper surface of the base 11 is a sliding surface 14 on which the bottom surface of the movable wall 16 slides. The bottom surface 15 side is a horizontal surface parallel to the sliding surface 14.

  The movable wall 16 is attached to the tip of the ball screw 18 and is configured to reciprocate. The other end of the ball screw 18 is rotatable by the adjusting knob 17. In particular, the lever 17a disposed on the adjusting knob 17 is used when a clamping force is required. A moving groove 19 in which a separation preventing piece 16 a for repelling the movable wall 16 from the bottom surface 15 reciprocates is fixed to the foot portion of the substantially T-shaped movable wall 16 by two bolts 16 b. The groove 18a at the tip of the ball screw 18 is held by the tip of the pin 16c driven from the top of the movable wall 16, and the connection between the movable wall 16 and the ball screw 18 is freely pivotable to prevent detachment.

Accordingly, there is almost no gap between the movable wall 16 and it is movable by the moving groove 19 and the ball screw 18. Therefore, by rotating the adjustment knob 17 disposed at the end of the ball screw 18, the movable wall 16 is moved, and the vise block 3 and the vise block 4 sandwich the workpiece 5, so that the precision vise in that state Can move multiple types of machining in that state.
However, the vise block 4 is disposed on the holding block 12 side, and the vise block 3 is disposed on the holding block 13 side so that the workpiece 5 can be maintained in a stable holding state. For example, as shown in FIG. 2, when the surface of the workpiece 5 is tapered or the range in which the workpiece 5 can be held thin is limited, there is a possibility that the desired vertical surface is not present. is there.
Specifically, referring to FIG. 2, when the surface on the movable wall 16 side of the workpiece 5 is not vertical at an angle θ, the vice block 4 is fixed to the surface on the movable wall 16 side of the workpiece 5 by tightening the ball screw 18. The vertical plane and the horizontal plane between the workpiece 5 and the vise block 3 and the vise block 4 are different.

  Patent Document 1 examines how to reduce the rotational moment θ and maintain the processing accuracy. When the workpiece 5 is a small part, the processing accuracy of the workpiece 5 can be obtained by the rotational moment θ. In addition, when holding a thin plate, etc., a tensile force is exerted on the upper surface of the thin plate and a compressive force is exerted on the bottom, and a convex bend is generated as the thin plate. Even if a flat surface is obtained by machining at the stage where it is removed from the precision vise, problems such as the processed surface becoming concave are examined.

JP-A-9-108969 Patent No. 5981064

As a result, in Patent Document 1, the precision vise for holding the workpiece 5 on the table of the machine tool, and the vise block 3 on the holding block 13 side for holding the workpiece 5 is the holding block 13 and the workpiece The upper end of the vice block 4 which is parallel to the contact surface of the object 5 and on the other movable wall 16 side is formed in parallel with the upper end for holding the workpiece 5. Then, in the contact surface with the movable wall 16, the upper portion of the holding portion on the movable wall 16 side is substantially in parallel with the vice block 4 and is in contact with a tapered surface where the lower portion is narrowed.
Generally, according to the above structure, as a method of holding small parts or thin plate-like processed parts in a predetermined position with a precision vise, tapping of the small part with a mallet or the like prevents the workpiece 5 from floating by rotational moment θ. It was However, in the present invention, it is not necessary to strike with a mallet or the like, and the taper of the movable side holding block provided between the movable wall 16 and the vice block 4 generates a vector force in the downward direction. Is eliminated, thus ensuring maintenance of machining accuracy.

As described above, Patent Document 1 can hold the workpiece 5 between the vice block 3 and the vice block 4, but for example, when the ball screw 18 is tightened, the bottom of the workpiece 5 abuts first, for example. Then, a reaction force by tightening is applied to the bottom.
At this time, when the workpiece 5 is a small part or a thin plate, a reaction force is generated at the bottom of the workpiece 5 with respect to the central axis of the ball screw 18, as shown in FIG. The rotational moment θ shown in FIG.
That is, it becomes a problem how to reduce the rotational moment θ and maintain the processing accuracy, but when the workpiece 5 is a small part, the bottom portion of the workpiece 5 is a precision vice due to the rotational moment θ It is not parallel to the bottom surface 15, and processing accuracy can not be obtained. When holding a thin plate or the like, a tensile force acts on the upper surface of the thin plate and a compressive force acts on the bottom surface thereof. For this reason, a convex curve is generated as the thin plate, and even if a plane is obtained by machining in this state, the machined surface becomes concave when it is removed from the precision vice.

On the other hand, in Patent Document 1, by forming a taper between the movable wall 16 and the vise block 4 on the movable wall 16 side, the compression force due to the rotation of the ball screw 18 becomes a component force at the tapered portion. The object 5 is pushed down to the bottom surface 15 side of the precision vice.
Since the vector component force is generated downward by the taper of the movable wall 16 and the vice block 4, the workpiece 5 is not lifted up, and the maintenance of the processing accuracy is ensured.
However, the technology of Patent Document 1 may be any attachment state of the workpiece 5 that can be corrected by tapping with a mallet or the like so that the taper functions, but when the surface of the workpiece 5 itself is distorted Also, both the vise block 3 and the vise block 4 may follow the angle. In addition, when the shape of a specific part is adjusted, the workpiece 5 may not be held accurately by the vice block 3 and the vice block 4 and the state may not be horizontal or vertical. In particular, if the contact resistance becomes high at a specific location for some reason, the workpiece 5 is held at the starting point there, and as a result, the processing accuracy can not be maintained.

  Therefore, the inventor has acquired the patent of Patent Document 2. That is, the bias block according to the invention of Patent Document 2 has a first insertion hole drilled leaving the thickness δ = 0.4 to 1.2 mm from the vertical back surface of the block main body formed of metal made of magnetic material, A first casing of diamagnetic body or nonmagnetic body is inserted in a thickness of 0.5 to 2.5 mm to which the first ferromagnetic body is attached, and the first diamagnetic body or the nonmagnetic body is inserted in the first casing. The housing is inserted and fixed integrally with the block main body by a first separation preventing body made of a diamagnetic body or a nonmagnetic body for preventing separation of the first ferromagnetic body. Therefore, the vice block of Patent Document 2 sucks in the vertical back direction by the first ferromagnetic material and also sucks in the horizontal direction perpendicular to the vertical back surface of the block body by the second ferromagnetic material. Because of this, the block body can not be moved vertically and horizontally, and a stable mounting state can be maintained.

  Then, a magnetic path in the horizontal direction is formed on the vice block side on the vertical back surface of the first ferromagnetic body, suction is performed with the vise block, and the block body is tilted because it is suctioned integrally with the fixed block of the precision vise. There is nothing to do. At the same time, since the bottom surface of the block main body is vertically attracted to the base in the horizontal surface of the second ferromagnetic body, the block main body is not lifted up integrally with the base of the precision vice. As a result, in the first ferromagnetic body and the second ferromagnetic body, both the magnetic field whose axis is in the horizontal direction and the axis whose magnetic field is in the vertical direction act at the same time. The vice block functions as part of the precision vice and can accurately clamp the horizontal and vertical of the workpiece at the desired position.

In addition, the second ferromagnetic member is attached to the second insertion hole drilled leaving the thickness δ of 0.4 to 1.2 mm from the horizontal surface of the block main body formed of metal made of magnetic material. A second magnetic or nonmagnetic material for inserting a second housing of 5 to 2.5 mm diamagnetic or nonmagnetic material to prevent separation of the second housing and the second ferromagnetic material It is integrated with the said block main body by the detachment prevention body.
Therefore, the side of the block main body on which the first ferromagnetic member is disposed to be attracted to the vertical back side is 0.5 to 0.5 mm in the first insertion hole drilled leaving the thickness δ = 0.4 to 1.2 mm. A first ferromagnet or nonmagnetic material comprising a first ferromagnetic material disposed in a 2.5 mm diamagnetic or nonmagnetic first housing to prevent detachment of the first ferromagnetic material. The body is sealed in the first insertion hole. Therefore, the first ferromagnetic body is disposed in the first housing in the first insertion hole, and the first housing and the first detachment preventing body are externally compressed to seal the first insertion hole. If stopped, the magnetic field from the ferromagnetic body not only makes the inside of the block body a magnetic path, but also forms a magnetic path in the horizontal direction on the vice block side on the vertical back side, and suction with the vice block is made.

  At the same time, the side of the block main body on which the second ferromagnetic member is disposed to be attracted to the horizontal surface is 0.5 to 2 in the second insertion hole drilled leaving the thickness δ = 0.4 to 1.2 mm. .2 A second detachment preventing body made of a diamagnetic body or nonmagnetic body for disposing the second ferromagnetic body in a second housing of diamagnetic body or nonmagnetic body of 5 mm and preventing the detachment of the second ferromagnetic body In the second insertion hole. Therefore, if the second ferromagnetic body is placed in the second housing and disposed in the second insertion hole, and the second insertion hole is sealed by compressing the second housing and the second detachment preventing body, The magnetic field from the ferromagnetic body not only makes the inside of the block body a magnetic path, but also forms a magnetic path in the second direction on the vice block side on the vertical back side, and suction with the base is made.

  In addition, a magnetic path in the horizontal direction is also formed on the side of the vertical block on the reverse side of the first ferromagnetic body, and suction with the vice block is performed. At the same time, the bottom surface of the block main body is attracted in the vertical direction to the base in the horizontal surface of the second ferromagnetic body. At this time, both of the first ferromagnetic body and the second ferromagnetic body having the magnetic field in the horizontal direction as an axis and the magnetic field in the second perpendicular direction as an axis are simultaneously formed. Moreover, the first ferromagnetic body and the second ferromagnetic body are disposed leaving a thickness of δ = 0.4 to 1.2 mm, and the first ferromagnetic body and the second ferromagnetism are provided. Since the body is closed with a diamagnetic or nonmagnetic material, no magnetic field is formed everywhere in the block body, and iron powder or cutting powder may be used as waste or air gun even if iron powder adheres to the vise block itself. Can be easily removed.

  However, if the characteristics are stabilized by strengthening a strong magnet such as a neodymium magnet as a ferromagnetic body as a bias block, the magnetic flux density of only the contact surface of the neodymium magnet becomes high, and iron powder, cutting powder, waste or air gun Can not be removed easily. Therefore, although the use of a plurality of ferromagnetic substances can be considered, the occurrence of the interference may have an adverse effect. Further, the arrangement of a plurality of ferromagnetic bodies makes complex cutting of the magnetic body impossible, and there is a limit to avoid interference.

  Therefore, the present invention solves such conventional problems and suppresses the maximum magnetic flux density without reducing the average magnetic flux radiated from the surface of the main body, and suppresses iron powder and cutting powder with waste or an air gun. It is an object of the present invention to provide a removable terminal structure of ferromagnetic material.

  The terminal structure of the ferromagnetic material according to the invention of claim 1 comprises a ferromagnetic material accommodated in a main body formed of magnetic metal and a diamagnetic or nonmagnetic material disposed around the periphery of the ferromagnetic material. The magnetic body, and the ferromagnetic body and a predetermined thickness stacked on the end of the ferromagnetic body in a direction perpendicular to the overlapping direction of the housing and having a predetermined area or more and made of a magnetic material A diffuser, and a blocking body made of a diamagnetic material or a nonmagnetic material with a predetermined thickness and a predetermined area or more disposed on the antiferromagnetic side of the diffuser.

Here, the main body is formed of magnetic metal.
The ferromagnetic body (permanent magnet) housed in the main body is housed in a magnetic body, housed in a main body formed of magnetic metal, and it is sufficient if both electrodes are disposed in the main body.
And although the said housing | casing is a cylinder which consists of a diamagnetic body or a nonmagnetic body arrange | positioned around a ferromagnetic body, when implementing this invention, a cylinder or a square cylinder or a ferromagnetic body has a ferromagnetic body. The end band may be wound around the end band.

Furthermore, the above-mentioned diffuser should just be a magnetic body, and represents the existence of volume. That is, it represents a predetermined thickness and a predetermined area stacked at the end of the ferromagnetic material in the direction perpendicular to the direction in which the ferromagnetic material and the casing overlap, that is, in the longitudinal direction. .
Furthermore, the blocking member is made of diamagnetic material or nonmagnetic material with a predetermined thickness and a predetermined area provided on the antiferromagnetic side of the magnetic material diffusion material. Therefore, the thickness of the diffuser made of a magnetic material and the predetermined area or more indicate the presence of a predetermined thickness and area, as in the case of a block made of a diamagnetic material or a nonmagnetic material.

In the terminal structure of a ferromagnetic body according to the invention of claim 2, the area between the diffuser and the blocking body is increased as the distance from the ferromagnetic body increases.
Here, the diffusion body and the blocking body expand the area of the blocking body compared to the ferromagnetic body, and change the direction of the magnetic flux to the blocking body. The larger the area as the distance from the ferromagnetic body is, the wider the area as the distance from the ferromagnetic body is gradually or continuously.

In the terminal structure of a ferromagnetic body according to the invention of claim 3, the diffuser and the blocking body are formed by repeatedly laminating one or more sheets.
Here, the diffusion body and the blocking body may be formed by laminating the blocking body on the diffusion body, or even if the diffusion body is further laminated on the diffusion body and the blocking body, the diffusion body The diffuser and the blocking body may be further stacked on the blocking body. It means that one or more pairs of the blockers in the diffuser may be sufficient.

The terminal structure of the ferromagnetic body according to the invention of claim 1 comprises a casing made of a diamagnetic body or a nonmagnetic body disposed around a ferromagnetic body housed in a main body formed of a magnetic metal, and the ferromagnetic body. A diffusion body made of a magnetic material laminated at the end of the body in the longitudinal direction of the NS magnetic pole, and a blocking body made of a diamagnetic material or a nonmagnetic material disposed on the antiferromagnetic side of the diffusion material.
Therefore, a casing made of a diamagnetic material or a nonmagnetic material is disposed around the ferromagnetic material contained in the main body made of magnetic metal, and the strength for which the S pole and the N pole are determined is determined. A magnetic body is accommodated in the housing. A diffuser made of a magnetic material is disposed on the magnetic pole of the S pole or the N pole, so that the magnetic flux passing through the ferromagnetic body is spread in the radial direction of the ferromagnetic body by the diffuser made of the magnetic body. The radially diffused magnetic flux is focused on the opposite side of the ferromagnetic material. At this time, the opposite surface side of the ferromagnetic material changes depending on the position inside and outside the housing, but even if the magnetic flux is blocked by the blocking body, the magnetic path is formed according to the diffuser, so the magnetic flux toward the outside of the housing is As a result, more magnetic fluxes pass through the outside of the housing, and the magnetic flux in the main body formed of magnetic metal becomes longer in track.

In the case of a magnetic circuit, since the precision bias is formed of a magnetic material, a diffusion body consisting of components of the precision vice with low magnetic resistance and a magnetic body becomes integral when the main body formed of a magnetic metal is mounted. And will face each other. The opposing magnetic paths are formed inside the housing and outside the housing.
Therefore, since the integral value of the diffused magnetic flux generated on the outer periphery of the ferromagnetic material is close to the integral value of the N pole or the S pole of the ferromagnetic material, the strength of the attractive force which is magnetically attracted (repelled) changes do not do. As described above, the maximum magnetic flux density is suppressed, iron powder and cutting powder can be removed with a rag or an air gun, and the configuration can be made without reducing the magnetic flux on the surface.
Further, when the casing made of diamagnetic material or nonmagnetic material is not a bottomed casing, there is nothing to suppress the magnetic field generated from the ferromagnetic material.

  In the terminal structure of the ferromagnetic material according to the invention of claim 2, since the diffusion body and the blocking body are formed such that the area becomes wider as the distance from the ferromagnetic body increases, the effect according to claim 1 is achieved. In addition, since the magnetic flux does not require sharp bending, the magnetic flux vector can be bent without increasing the magnetic flux density.

  In the terminal structure of the ferromagnetic material according to the invention of claim 3, since the diffusion body and the blocking body are repeatedly laminated, in addition to the effect according to claim 1 or 2, the step of changing the magnetic flux is performed. It can be suppressed dynamically or continuously.

FIG. 1 is a perspective view of a conventional precision vice. FIG. 2 is a central transverse longitudinal sectional view of FIG. FIG. 3 is a perspective view of a precision vice using the terminal structure of the ferromagnetic material according to the first embodiment of the present invention. FIG. 4 is a central cross-sectional view of a precision vice using the terminal structure of ferromagnetic material according to the first embodiment of the present invention. FIG. 5 is a longitudinal cross-sectional view of the terminal structure of the ferromagnetic material according to Embodiment 1 of the present invention. FIG. 6 is a perspective view in which the terminal structure of the ferromagnetic material according to the first embodiment of the present invention is incorporated in a precision vice block. FIG. 7 is a longitudinal cross-sectional view of the terminal structure of the ferromagnetic material according to the second embodiment of the present invention. FIG. 8 is a perspective view in which the terminal structure of the ferromagnetic material according to the second embodiment of the present invention is incorporated in a precision vice block. FIG. 9 is a longitudinal cross-sectional view showing another example of the terminal structure of the ferromagnetic material according to Embodiment 3 of the present invention. FIG. 10 is a longitudinal sectional view showing the function of the terminal structure of the ferromagnetic material according to the embodiment of the present invention, (a) is a sectional view showing an elevation position, (b) is an enlarged sectional view, (c) is It is an expanded sectional view at the time of changing a magnetic pole. FIG. 11 is a horizontal cross-sectional view in which two ferromagnetic members are disposed horizontally cut along a cutting line A-A in FIG. FIG. 12 is an explanatory view of a cross section showing a generalized example of the terminal structure of the ferromagnetic material according to the embodiment of the present invention, in which (a) is a cross section before mounting and (b) is a cross section after mounting.

First Embodiment
Hereinafter, embodiments of the present invention will be described based on the drawings. Note that, in the embodiment, the same symbols and symbols in the drawings are the same or corresponding functional parts, and therefore the description thereof will not be repeated here.
First, for Embodiment 1 of the present invention, a perspective view of a precision vice using the terminal structure of the ferromagnetic material of Embodiment 1 of the present invention shown in FIG. 3 is used similarly to the terminal structure of the ferromagnetic shown in FIG. The central cross-sectional view of the precision vice is described.
In FIG. 3 and FIG. 4, the holding block 12 and the holding block 13 having inner surfaces juxtaposed on both end sides of the base 11 constitute the vice body 10 by the base 11, the holding block 12 and the holding block 13. The inner surfaces of the holding block 12 and the holding block 13 are parallel to each other. The upper surface of the base 11 is a sliding surface 14 on which the movable wall 16 slides. The bottom surface 15 side is a bottom surface. Therefore, the sliding surface 14 is a bottom surface together with the bottom surface 15.
The precision vice block 30 of the first embodiment is mounted on the holding block 13 and the movable wall 16.

  The movable wall 16 is attached to the tip of the ball screw 18 and is configured to reciprocate. The other end of the ball screw 18 is rotatable by the adjusting knob 17. In particular, the lever 17a of the adjustment knob 17 is used when a clamping force is required. A moving groove 19 in which a separation preventing piece 16 a for repelling the movable wall 16 from the bottom surface 15 reciprocates is fixed to the foot portion of the substantially T-shaped movable wall 16 by two bolts 16 b. The connection between the movable wall 16 and the ball screw 18 is such that the groove 18a at the tip of the ball screw 18 is pivotable by a pin 16c driven in from the upper portion of the movable wall 16 to prevent detachment.

  Therefore, the movable wall 16 is movable in the vertical state by the moving groove 19 and the ball screw 18 without play. Therefore, by rotating the adjustment knob 17 disposed at the end of the ball screw 18, the movable wall 16 is moved and the precision vice block 30 sandwiches the workpiece 5, so the precision vice block 30 is held in this state. If it is tightened, multiple types of machining that can be moved in units of precision vices can be performed.

Next, the precision vice block 30 will be described with reference to FIGS. 5 and 6.
Note that the precision vice block 30 does not substantially distinguish between right and left, and a block main body 34 that is a main body formed of magnetic metal at a thin portion 39 located on the lower thick portion 32. Is formed. The back surfaces of the thick portion 32 and the thin portion 39 are suctioned by the holding block 13 made of a magnetic material, and form an erected surface 31 of the block main body 34 to be in surface contact (joining). Further, the bottom surface 38 is a surface perpendicular to the elevation surface 31, that is, a horizontal surface.

In the vicinity of the center of the thick portion 32, two insertion holes 35 on the bottom surface 38 side provided with a space of 5 to 15 cm are provided. The distinction between “insertion hole 35a” and “insertion hole 35b” below and “... a” and “... b” which have the same relationship as this type of structure is only the difference in the distance between the two. Since they are functionally the same, they may be referred to as "insertion hole 35" and the same meaning as the same meaning without distinction.
The remaining thickness δ of the depth from the outer surface of the insertion hole 35 on the bottom surface 38 remains the remaining thickness δ from 0.4 to 1.2 mm from the bottom surface 38 of the block main body 34 forming the main body of the vice block. It is drilled. The reason for drilling with the remaining thickness δ = 0.4 to 1.2 mm is that the block main body 34 formed of the magnetic material is set to this remaining thickness δ from the mechanical strength of the magnetic material, The surface can be cut and no dents or protrusions can be produced when polishing is performed by applying an external force. In the experiment by the inventor, the residual thickness δ = 0.4 mm is the lowest residual thickness δ, and the residual thickness δ of 1.2 mm is the maximum thickness, and the residual thickness δ is 1.2 mm or more. As it is increased, the reluctance decreases and a magnetic path is created in the block body 34. If the remaining thickness δ = 1.2 mm or less, this is the boundary between forming a magnetic path inside the block body 34 or forming a magnetic path outside.

  In the insertion hole 35 on the bottom surface 38 side, the bottom surface ferromagnetic body 41 inserted in a casing 42 made of a diamagnetic body or a nonmagnetic body such as copper or brass made of a cylinder with a thickness of 0.5 to 2.5 mm is Have. The casing 42 of a diamagnetic or nonmagnetic material having a thickness of 0.5 to 2.5 mm has a thickness of 0.5 or less, and the malleability of a material which only involves the ferromagnetic body 41 on the bottom surface 38 side Since a circuit having a low magnetic resistance is formed in the block main body 34 without a space of 0.5 to 2.5 mm, a cylinder of a 0.5 to 2.5 mm thick diamagnetic or nonmagnetic material is desirable. Also, if the thickness of the block body 34 is 0.5 or less, the ferromagnetic member 41 on the bottom surface 38 side becomes a cause of chatter, and the center of gravity is moved to make it difficult to produce stable characteristics. Therefore, the ferromagnetic body 41 is wound with a diamagnetic or nonmagnetic material having a thickness of 0.5 to 2.5 mm, and the magnetic body is contained only by applying a pressing force. Furthermore, the material of the blocking body 44 is preferably brass from the viewpoint of mechanical strength by the blocking body 44 as a separation preventing body described later which fixes the ferromagnetic body 41 indirectly. In addition, if the thickness exceeds 2.5 mm, switching of the magnetic path described later can not be performed well.

A casing 42 of diamagnetic or nonmagnetic material is inserted into the insertion hole 35 on the bottom surface 38 side which is drilled leaving the remaining thickness δ = 0.4 to 1.2 mm from the bottom surface 38. In the housing 42, the magnetic pole (N or S) of the ferromagnetic body 41 is a surface. The top surface of the diamagnetic or nonmagnetic casing 42 is the top surface of the ferromagnetic body 41, and as a result, is in the same plane.
The upper surfaces of the casing 42 and the ferromagnetic body 41 are made of a magnetic body, and a diffusion body 43 made of a magnetic body and having a predetermined thickness and area is in close contact with the adsorption state. That is, an insulating layer made of an air layer or a vacuum layer having high magnetic resistance is not formed between the housing 42 and the top surface of the ferromagnetic body 41 and the diffusion body 43 made of a magnetic body. The diffuser 43 is inserted into the insertion hole 36, and the insertion hole 37 into which the blocking body 44 is inserted is formed to be stepped.
In the case of practicing the present invention, the ferromagnetic body 41 on the bottom surface 38 side is not limited to a cylindrical shape, and a square pole shape, a dice shape, or the like can be used, and KS steel other than neodymium magnet, MK Steel, ferrite magnets may be used, or other magnets may be used. Alternatively, a cold-rolled silicon steel plate or the like may be set as the relay of the magnetic circuit. In the embodiment of the present invention, a cylindrical neodymium magnet is used as the bottom surface ferromagnetic body 41.

Furthermore, a blocking body 44 made of a diamagnetic material or a nonmagnetic material is disposed with a predetermined thickness and area disposed on the top surface of the diffusing body 43, that is, on the antiferromagnetic side of the diffusing body 43. The upper surface of the diffusion body 43 is made of a diamagnetic body or a nonmagnetic body, and the diffusion body 43 made of a magnetic body is in close contact with a suction state with a predetermined thickness and area. That is, the high layer of the magnetoresistive layer such as the air layer or the vacuum layer is not formed between the upper surface of the diffusion body 43 and the blocking body 44. The blocking body 44 of this embodiment is copper, brass or the like. In the case of practicing the present invention, the same effect can be obtained with a magnetic material.

  As described above, the end structure magnetic body of the ferromagnetic body of the present embodiment includes the block body 34 formed of a metal, the ferromagnetic body 41 accommodated in the block body 34, and the magnetic poles of the ferromagnetic body 41. A housing 42 made of diamagnetic or nonmagnetic material disposed around the outer periphery with NS as a central axis, and a magnetic material having a predetermined thickness and area stacked at the end of the magnetic material direction of the magnetic material 41 A diffusion body 43 and a blocking body 44 made of a diamagnetic or nonmagnetic body with a predetermined thickness and area disposed on the antiferromagnetic side of the diffusion body 43 are provided.

Therefore, a casing 42 made of a diamagnetic material or a nonmagnetic material is disposed around the ferromagnetic body 41 housed in the block main body 34 made of magnetic metal, and the casing 42 is strong in the casing 42. The N pole or the S pole of the magnetic body 41 is determined. Specifically, the N pole and the S pole of the lower surface of the ferromagnetic body 41 inserted into the two "insertion holes 35a" and "insertion holes 35b" may be opposite to each other.
Since the diffusion body 43 made of a magnetic body is disposed at the N pole or the S pole of the ferromagnetic body 41, the magnetic flux passing through the ferromagnetic body 41 is a ferromagnetic body by the diffusion body 43 made of a magnetic body It is diffused as a radial vector at the center of 41. The radially diffused magnetic flux is converged on the opposite surface side of the ferromagnetic body 41.

At this time, the opposite surface side of the ferromagnetic body 41 changes depending on the inside of the housing 42 and the position outside the housing 42, but even if the magnetic flux is blocked by the blocking body 44, the magnetic path is formed according to the diffusion body 43 Therefore, a magnetic flux directed to the outside of the housing 42 is generated. Many magnetic fluxes pass through the outside of the housing 42, and the magnetic flux in the block main body 34 formed of magnetic metal becomes longer in track.
Therefore, since the integral value of the diffused magnetic flux generated on the outer periphery of the ferromagnetic body 41 is close to the integral value of only the N pole or the S pole of the ferromagnetic body, almost strong and weak magnetic attraction (repulsion) It does not change. As described above, the maximum magnetic flux density is suppressed, iron powder and cutting powder can be removed with a rag or an air gun, and the configuration can be made without reducing the magnetic flux on the surface.

Thus, a cylindrical body having a thickness of 0.5 to 2.5 mm with respect to the insertion hole 35 on the side of the bottom surface 38 drilled as the remaining thickness δ from the bottom surface 38 of the block main body 34 formed of metal made of magnetic material. A casing 42 made of a diamagnetic or nonmagnetic material is inserted. A ferromagnetic body 41 is inserted in a casing 42 made of a cylinder having a thickness of 0.5 to 2.5 mm. Alternatively, the ferromagnetic body 41 is enclosed by the housing 42 and inserted into the insertion hole 35 on the bottom surface 38 side. After the housing 42 and the ferromagnetic body 41 are inserted into the insertion hole 35, the diffusion body 43 made of a magnetic body is inserted, and further, the blocking body 44 made of a diamagnetic body or a nonmagnetic body is inserted. Unify.
At this time, the housing 42, the diffuser 43, and the blocking member 44 are deformed, but it is necessary to prevent an insulating layer such as an air layer from being generated for contact suction between the bottom surface ferromagnetic body 41 and the diffuser 43 made of a magnetic substance. There is.

That is, in order to insert the blocking body 44 into the insertion hole 35 on the bottom surface 38 side and integrate it with the block main body 34, insert the housing 42 and the ferromagnetic body 41 into the insertion hole 35 on the bottom surface 38 side. The body 44 is inserted to apply a pressing force, and the housing 42 and the blocking body 44 are deformed to be integrated with the block main body 34, and the surface is cut and machined by a machine tool.
In particular, when the blocking body 44 is packed, the ferromagnetic body 41 is pressure-fixed so as to be in contact via the diffuser 43.

  Therefore, when the block body 34 is not attached to the holding block 13 and the movable wall 16 of the precision vice, the precision vice block 30 of the present embodiment leaves the range of the remaining thickness δ from the bottom surface 38 of the block body 34. An appropriate horizontal distance (for example, a relative distance of 5 to 15 cm between the ferromagnetic members 41) is separated from the insertion holes 35 formed, and the ferromagnetic members 41 are disposed. A magnetic path of the remaining thickness δ on the side is formed. At this time, a magnetic path is formed by the remaining thickness δ of the bottom surface 38 of the block main body 34, the magnetic flux outside the block main body 34 becomes weak, and iron powder and cutting powder adhere to the surface of the bottom surface 38 of the block main body 34 Can be cleaned easily with an air gun or the like. Of course, when the block main body 34 is attached to the holding block 13 and movable wall 16 of the precision vice, the block main body is erected stably and attached to the holding block 13 and movable wall 16 of the precision vice block 30. 34 can be easily cleaned with an air gun or the like.

  Further, when the block body 34 is mounted on the holding block 13 and the movable wall 16 of the precision vice, the precision vice block 30 of the present embodiment is a holding block 13 on which the magnetic path on the bottom surface 38 side of the block body 34 is mounted. Since the magnetic resistance is also reduced on the movable wall 16 side, the ferromagnetic body 41 on the bottom surface 38 side is formed by leaving the range of the remaining thickness δ from the bottom surface 38 of the block main body 34. Since the magnetic flux density of the remaining thickness δ on the bottom surface 38 side becomes high, when mounted on the holding block 13 and the movable wall 16 of the precision vice, the block body 34 is adsorbed with a large suction force.

Therefore, when the precision vice is not used, the magnetic flux density in the range of the remaining thickness δ on the surface side in the block main body 34 becomes high, and in use, the magnetic flux on the surface increases and the mounting state of the block main body 34 is stabilized. The cutting powder can be removed with a rag or an air gun. Therefore, the block can not be moved in the direction of the bottom of the block body 34, and chips do not adhere to the block body 34, so that accurate processing can be performed.
At this time, when the block body 34 is not attached to the holding block 13 of the precision vice and the movable wall 16, it is attached to the holding block 13 of the precision vice outside the block body 34 and the movable wall 16 and the magnetic flux entering and exiting there Conversely, when the block body 34 is mounted on the holding block 13 and the movable wall 16 of the precision vice, the holding block 13 of the precision vice is movable from the elevation 31 and the bottom surface 38 of the block body 34. Although the maximum value of the magnetic flux attached to the wall 16 is lowered, the integrated value is increased and can be stably maintained.

Second Embodiment
Next, the pair of precision vice blocks 30 according to the second embodiment will be described with reference to FIGS. 7 to 8.
The precision vice block 30 of the present embodiment is the same as that of the first embodiment in that the block body 34 is formed of the thick portion 32 and the thin portion 39 located thereon. The back surfaces of the thick portion 32 and the thin portion 39 are suctioned by the holding block 13 made of a magnetic material, and form an erected surface 31 of the block main body 34 to be in surface contact (joining).
The remaining thickness δ of the first embodiment is present at a point moved upward from the bottom surface 38, and the remaining thickness δ of the second embodiment is formed on the elevation 31 as shown in FIG. . It is also possible to form two of these on the bottom surface 38 side of the single block body 34 and two on the elevation surface 31 side of the second embodiment. Here, an example in which two ferromagnetic members 51 are disposed on the side of the elevation 31 will be described.

  In the vicinity of the center of the thick portion 32, the insertion holes 35 of the elevations 31 provided at intervals of 5 to 15 cm are provided. The remaining thickness δ of the depth of the insertion hole 35 of the elevation 31 is drilled leaving the remaining thickness δ from the elevation 31 of the block main body 34 as in the first embodiment. It is possible to cut the surface of the block main body 34 made of a magnetic material by setting the residual thickness δ to this residual thickness δ because of the mechanical strength of the magnetic material. Also, even when polishing with external force, no dents or protrusions can be made. In the experiment by the inventor, the residual thickness δ = 0.4 mm is the lowest residual thickness δ, and the residual thickness δ of 1.2 mm is the maximum thickness, and the residual thickness δ = 1.2 mm or more If the thickness is increased, the magnetic resistance is reduced and a magnetic path is formed in the block body 34. If the remaining thickness δ = 1.2 mm or less, it is considered as a boundary as to whether a magnetic path is formed inside the block body 34 or a magnetic path is formed outside.

In the insertion hole 35 of the erected surface 31, a ferromagnetic material 51 of the erected surface 31 inserted into the insertion hole 35 of the diamagnetic or nonmagnetic erected surface 31 consisting of a cylinder with a thickness of 0.5 to 2.5 mm. Have. When the thickness is 0.5 mm or less, there is no room for a material for winding in the ferromagnetic body 51 and the resistance 52 Since a low magnetic circuit is formed in the block body 34, a casing 52 of diamagnetic or nonmagnetic material having a thickness of 0.5 to 2.5 mm is desirable. In addition, the ferromagnetic material 51 on the elevation 31 is a cause of chattering, so that the center of gravity is moved, making it difficult to produce stable characteristics. Therefore, a ferromagnetic or nonmagnetic material with a thickness of 0.5 to 2.5 mm is wound on by adding the ferromagnetic member 51 of the erected surface 31 and adding the pressing force by the blocking member 54 so as to be contained. It is.
Furthermore, in view of mechanical strength for fixing the ferromagnetic body 51 of the erected surface 31 by the blocking body 54, when the thickness of the housing 52 exceeds 2.5 mm, the magnetic flux density becomes high, and the resistance value of the magnetic circuit When it is too low, the linearity of the magnetic flux becomes high, and it becomes difficult to switch the magnetic path when mounted on the holding block 13 and the movable wall 16 of the precision vice.
The area of the erected surface 31 of the insertion hole 35 is smaller than that of the insertion hole 36 accommodating the diffuser 53 and the blocking body 54.

In the present embodiment, a cylindrical body is used as the housing 52. However, in the case of practicing the present invention, a housing or a bending plate which exposes only a specific surface, not the cylindrical body, and closes the other. It may be
Although the housing 52 may be omitted, the provision of the housing 52 makes the spread of the magnetic flux from the center of the ferromagnetic body 51 of the raised surface 31 having a high magnetic flux density sharply wider, and the surface of the block main body 34 Since the magnetic flux density is low, it is more conditionally advantageous than omitting the housing 52.
The antiferromagnet or nonmagnetic blocker 54 integrated with the block main body 34 in order to prevent the separation of the ferromagnetic body 51 of the case 52 and the elevation 31 is the ferromagnetic material of the case 52 and the elevation 31 In addition to the prevention of the detachment from the insertion hole 35 of 51, they are integrally fixed so that they do not move even if they are contact-adsorbed inside.

As described above, against the insertion hole 35 drilled as the residual thickness δ from the vertical surface 31 of the block main body 34 formed of metal made of magnetic material, the opposite side is formed of a cylinder having a thickness of 0.5 to 2.5 mm. A magnetic or nonmagnetic housing 52 is inserted. The ferromagnetic body 51 of the upstanding surface 31 is inserted into a casing 52 made of a cylinder having a thickness of 0.5 to 2.5 mm. Alternatively, the ferromagnetic body 51 is wrapped by the housing 52 and inserted into the insertion hole 35.
After the housing 52 and the ferromagnetic body 51 are inserted into the insertion hole 35, the diffusion body 53 made of a magnetic body is inserted, and the blocking body 54 made of a diamagnetic body or a nonmagnetic body is inserted there. Unify.

  That is, in order to insert the blocking body 54 into the insertion hole 35 and the insertion hole 37 and integrate it with the block main body 34, the housing 52 and the ferromagnetic body 51 are inserted into the insertion hole 35 of the elevation 31 and then inserted. The blocking body 54 is inserted into the hole 37 and a pressing force is applied to deform the housing 52 and the blocking body 54 to be integrated with the block main body 34, and the surface is cut by a machine tool to finish processing.

  As described above, the end structure magnetic body of the ferromagnetic body of the present embodiment includes the block body 34 of the main body made of metal, the ferromagnetic body 51 accommodated in the block body 34, and the magnetic pole NS of the ferromagnetic body 51. And a housing 52 made of diamagnetic or nonmagnetic material disposed around the central axis of the magnetic body, and a diffusion made of a magnetic material with a predetermined thickness and area stacked at the end portion of the ferromagnetic material 51 in the magnetic pole direction Body 53, and a blocking body 54 made of diamagnetic or nonmagnetic material with a predetermined thickness and area disposed on the antiferromagnetic side of the diffusing body 53, and the first embodiment is rotated by 90 degrees It is fixed at the planned position.

Therefore, a casing 52 made of a diamagnetic material or a nonmagnetic material is disposed around the ferromagnetic body 51 housed in the block main body 34 formed of magnetic metal, and both sides in the casing 52 are provided. The N pole or the S pole of the ferromagnetic body 51 is determined. Specifically, the N pole and the S pole of the lower surface of the ferromagnetic body 51 inserted into the two insertion holes 35 may be opposite to each other.
Since the diffusion body 53 made of a magnetic body is disposed at the N pole or the S pole of the ferromagnetic body 51, the magnetic flux that has passed through the ferromagnetic body 51 becomes a ferromagnetic body by the diffusion body 53 made of a magnetic body It is diffused as a radial vector at the center of 51. The radially diffused magnetic flux is converged on the side of the magnetic pole opposite to the ferromagnetic body 51.

At this time, the magnetic flux density changes depending on the inside of the housing 52 and the position outside the housing 52 on the opposite surface side of the ferromagnetic body 51, but even if the magnetic flux is blocked by the blocking body 54, the magnetic path is the diffuser 53 Since magnetic flux directed to the outside of the housing 52 is generated according to the above, each magnetic flux passes through the outside of the housing 52 more, and the magnetic flux in the block main body 34 formed of magnetic metal becomes longer in track .
Therefore, since the integral value of the diffusion flux generated on the outer periphery of the ferromagnetic body 51 is close to the integral value of the N pole or the S pole of the ferromagnetic body, the strength of the attractive force which magnetically attracts (repels) changes do not do. As described above, the maximum magnetic flux density is suppressed, iron powder and cutting powder can be removed with a rag or an air gun, and the configuration can be made without reducing the magnetic flux on the surface.

  Therefore, when the block body 34 is not attached to the holding block 13 and the movable wall 16 of the precision vice, the precision vice block 30 of the present embodiment leaves the range of the remaining thickness δ from the vertical surface 31 of the block body 34. Since the ferromagnetic body 51 is disposed at an appropriate horizontal distance (for example, 5 to 15 cm) between the vertical plane 31 and the insertion hole 35 of the vertical plane 31 formed, the magnetic flux is A magnetic path in the range of the remaining thickness δ on the magnetic body 51 side is formed. At this time, a magnetic path is formed by the remaining thickness δ of the raised surface 31 of the block main body 34, the magnetic field outside the block main body 34 becomes weak, and iron powder and cutting powder attached to the surface of the raised surface 31 of the block main body 34 exist. Even with an air gun, it can be cleaned easily.

  The precision vice block 30 of this embodiment is a holding block on which the magnetic path on the side of the rising surface 31 of the block body 34 is mounted when the block body 34 is mounted on the holding block 13 of the precision vice and the movable wall 16. 13, It is also formed on the movable wall 16 side, and the magnetic resistance is reduced, so the ferromagnetic body 51 is formed leaving the range of the remaining thickness δ from the elevation surface 31 of the block body 34. Since the magnetic field on the surface 31 side has a high magnetic flux density in the range of the remaining thickness δ, the holding block 13 and the movable wall 16 of the precision vice attract the block body 34 with a large attractive force.

Therefore, the magnetic flux passing through the outer surface of the remaining thickness δ on the surface side increases during use, stabilizes the mounting state of the block body 34, and decreases the magnetic flux of the remaining thickness δ when not in use. Or it can be removed by an air gun. Therefore, it can not move in the vertical direction 31 of the block body 34, and accurate processing is possible.
Therefore, when the block body 34 is not attached to the holding block 13 and the movable wall 16 of the precision vice, the magnetic flux density to the outside of the block body 34 can be reduced, and conversely, the block body 34 holds the precision vice When mounted on the block 13 and the movable wall 16, the integral value of the magnetic flux exiting from the raised surface 31 and the bottom surface 38 of the block body 34 becomes large and can be stably held. Further, even when the block body 34 is attached to the holding block 13 and the movable wall 16 of the precision vice, since the block body 34 is attracted to the holding block 13 and the movable wall 16 of the precision vice, the workpiece 5 is removed When done, iron powder and cutting powder can be removed with an air gun.

Third Embodiment
In the first and second embodiments, the magnetic field on the bottom surface 38 side and the magnetic field on the vertical surface 31 side have been described. However, in the case of practicing the present invention, the functions of the ferromagnetic body 61, the housing 62, the diffuser 63, and the blocking body 64 are not different from those of the first embodiment and the second embodiment.
The difference is that the ferromagnetic body 61 and the housing 62, the diffusion body 63, and the blocking body 64 are stacked to make the insertion hole 37 slidable.
Further, the insertion hole 37 which is a lateral hole has a large opening area, and is tapered such that the area becomes smaller as it goes deeper. The thickness on the bottom surface 38 side is the thickness of the remaining thickness δ.

In the third embodiment of FIG. 9, the ferromagnetic body 61 is inserted into the casing 62 made of a diamagnetic or nonmagnetic material such as copper and brass, and the upper surfaces of the ferromagnetic body 61 and the casing 62, that is, ferromagnetic A diffuser 63 is disposed on the magnetic pole side of the body 61, and a pressing force is applied to the diffuser 63 to press it in, and then a blocking body 64 made of diamagnetic material or nonmagnetic material is pressed in. Then, a separation preventing member 65 made of a diamagnetic material or a nonmagnetic material such as copper or brass is further pressed in.
At this time, if the ferromagnetic body 61 and the case 62 use a cylindrical case 62, a gap is easily generated. Therefore, it is preferable to use a case 62 such as a prism, if possible.
As described above, in the ferromagnetic body 61 and the casing 62, since the diffusion body 63 changes the direction of the magnetic flux of the magnetic body 61, the magnetic flux density of the diffusion body 63 does not increase.

Further, in the present embodiment, the separation preventing member 65 is made of a diamagnetic or nonmagnetic material such as copper or brass, but in the case of practicing the present invention, the separation preventing member 65 is made of a magnetic material. The formation is a characteristically balanced structure.
In the present embodiment, the magnetic pole is provided on the bottom surface 38 and the erected surface 31 as the first to third embodiments, but any of the first to third embodiments can be applied to the bottom surface 38 or It may be any side on the surface 31 side.

[Summary of the embodiment]
The terminal structure of the ferromagnetic material according to each of the above embodiments has been described in the case where the ferromagnetic materials 41, 51, 61 are provided on the bottom surface 38 or the erected surface 31. However, according to the invention, at the same time, the bottom surface 38 or the elevation 31 is provided with the remaining thickness δ.
At this time, it is desirable that the positions of the two ferromagnetic members 41, 51, 61 be different in distance between the bottom surface 38 side and the elevation surface 31 side.

  In FIG. 10 to FIG. 12, the terminal structure of the ferromagnetic material of each of the above embodiments is composed of ferromagnetic materials 41, 51, 61 housed in a block main body 34 as a main body made of magnetic metal, and a ferromagnetic material Casings 42, 52, 62 made of diamagnetic or nonmagnetic material disposed around the central axis of both magnetic poles N, S of 41, 51, 61, ferromagnetic bodies 41, 51, 61 and the casing A diffuser 43 made of a magnetic material having a predetermined thickness and a predetermined area or more stacked on the end of the ferromagnetic members 41, 51, 61 in a direction perpendicular to the overlapping direction of 42, 52, 62, 53, 63 and a predetermined thickness and a predetermined area or more disposed on the antiferromagnetic side of the diffusers 43, 53, 63 and a blocking body 44, 54, 64 made of a diamagnetic material or a nonmagnetic material It is equipped.

Here, the block main body 34 formed of magnetic metal as the main body is used, but in the case of practicing the present invention, the block of precision vice may be used as long as it is formed of magnetic metal. It is not limited to the main body 34.
The ferromagnetic members 41, 51 and 61 accommodated in the magnetic metal as the main body are accommodated in the magnetic body and are accommodated in the block main body 34 as the main body formed of the magnetic metal, The N pole should just be arrange | positioned in the magnetic body metal as a main body. In addition, accommodation in the block main body 34 of this embodiment may be within the main body in which both poles of the ferromagnetic members 41, 51, 61 are formed of magnetic metal.

  The housings 42, 52, 62 of the above embodiment are cylindrical bodies made of diamagnetic material or nonmagnetic material disposed around the ferromagnetic materials 41, 51, 61, and in the case of practicing the present invention Alternatively, the ferromagnetic members 41, 51, 61 may be wound around a cylindrical or square tube or an endless band. That is, the housings 42, 52, 62 do not have to form a magnetic path around the ferromagnetic members 41, 51, 61, and a magnetic path may be formed at the S pole or the N pole at the end.

When the holding block 13 of the precision vice block 30 and the movable wall 16 do not exist, as shown in FIG. 12A, the magnetic flux is formed to have the remaining thickness δ of 0.4 to 1.2 mm according to the present embodiment. The magnetic flux flows through the magnetic body, and the magnetic path is led from the ferromagnetic bodies 41, 51, 61 to the diffusion bodies 43, 53, 63, where the spreading is added, and the magnetic flux of residual thickness δ The density is increased to converge on the opposite magnetic poles of the ferromagnetic members 41, 51, 61.
Therefore, the magnetic flux is as depicted in FIG. As a matter of course, when the magnetic poles are reversed, the magnetic flux is also reversed.

  However, when suction is applied to the holding block 13 or the movable wall 16 of the precision vice block 30, the block body 34 and the holding block 13 or the movable wall 16 come into close contact, and the magnetic resistance becomes a resistance value similar to that of the block body 34. However, since the remaining thickness δ is limited, it becomes saturated and the magnetic flux in FIG. 12A becomes difficult to pass. However, when the block body 34 and the holding block 13 or the movable wall 16 are attracted, as shown in FIG. 12B, the magnetic flux is not affected by the remaining thickness δ of the present embodiment, and the holding block 13 or the movable wall 16 is The magnetic path is led from the ferromagnetic bodies 41, 51, 61 to the diffusion bodies 43, 53, 63, where the spreading is added, and the remaining thickness .delta. The magnetic flux density is increased to converge on the opposite poles of the ferromagnetic members 41, 51, 61. Therefore, a magnetic flux as shown in FIG. 12 (b) is obtained, and the suction force also becomes strong.

Therefore, in the precision vice block 30 of the present embodiment, when the block body 34 is not attached to the holding block 13 and the movable wall 16 of the precision vice, the magnetic flux is concentrated on the remaining thickness δ from the vertical surface 31 of the block body 34 As a result, the magnetic resistance of the magnetic path in the range of the remaining thickness δ on the side of the ferromagnetic body 51 of the vertical surface 31 is increased.
However, when the block body 34 of the precision vice block 30 of the present embodiment is attached to the holding block 13 and the movable wall 16 of the precision vice, the magnetic flux concentrates on the remaining thickness δ from the elevation surface 31 of the block body 34 Since the holding block 13 of the precision vice and the movable wall 16 are a magnetic path of low magnetic resistance, the holding block 13 of the precision vice and the movable wall 16 are magnetic paths, and the magnetic flux distribution is different. The suction force of the holding block 13 and the movable wall 16 increases. Even if iron powder or cutting powder adhering to the surface of the erected surface 31 of the block body 34 is present in this state, it can be easily cleaned by an air gun or the like.

  Further, in FIG. 12, a blocker 46 in which the diffusers 43, 53, 63 are made of a diamagnetic material or nonmagnetic material such as copper or brass rather than the case 42, 52, 62 than in the case of the diffusers 43, 53, 63. However, although the diameter of the diffusion body 47 made of magnetic material is larger than that of the blocking body 46, the housings 42, 52, 62, the diffusion bodies 43, 53, 63, The diameters of the body 46 and the diffusion body 47 do not necessarily have to increase with distance from the magnetic poles of the ferromagnetic members 41, 51, 61. That is, for example, even with the same diameter, since the magnetic field comes in and out from those peripheral surfaces, there is no significant influence. However, it is logically advantageous to increase the diameters of the housings 42, 52, 62, the diffusers 43, 53, 63, the blocker 46, and the diffuser 47 as they move away from the magnetic poles of the ferromagnetic members 41, 51, 61. .

When a magnetic flux as shown in FIG. 12 (b) is formed, it is attracted to the holding block 13 or the movable wall 16 of the precision bias block 30, and the magnetic material formed to have a residual thickness δ = 0.4 to 1.2 mm is Since the reluctance is lower than when passing, the suction force of the holding block 13 or the movable wall 16 of the precision vice block 30 and the block main body 34 becomes stronger, and the stable mounting state as the precision vice block 30 is maintained.
Further, even if it is used as the precision vice block 30, shavings can be removed by an air gun and efficient work can be performed.

The diffusers 43, 53, 63 of the precision vice block 30 of the present embodiment may be magnetic bodies of a predetermined thickness and area. Here, when having a predetermined thickness and area, it means that it is sufficient to have a volume as a magnetic body.
Furthermore, the blocking body 46 is made of a diamagnetic body or nonmagnetic body with a predetermined thickness and a predetermined area or more disposed on the antiferromagnetic side of the diffusion bodies 43, 53, 63 made of a magnetic body. It is. However, in the case of practicing the present invention, the characteristics do not change significantly even if formed of a magnetic material.

  As described above, the terminal structure of the ferromagnetic body in the precision bias block of the present embodiment is arranged around the ferromagnetic bodies 41, 51, 61 housed in the main body such as the block main body 34 formed of magnetic metal. The housings 42, 52, 62 made of diamagnetic material or nonmagnetic material and the predetermined thickness and area of the ferromagnetic materials 41, 51, 61 stacked on the end of the NS magnetic pole in the longitudinal direction, A magnetic body or the like is not less than a predetermined thickness and area of the diffusion bodies 43, 53, 63 and the diffusion bodies 43, 53, 63 disposed on the opposite side of the ferromagnetic bodies 41, 51, 61 And a body blocker 46.

  Therefore, casings 42, 52, 62 made of diamagnetic material or nonmagnetic material are provided around the ferromagnetic members 41, 51, 61 housed in the block main body 34 or the like as the main body made of magnetic metal. The N pole and the S pole of the ferromagnetic members 41, 51, 61 are determined in the housings 42, 52, 62, respectively. Since the diffusion body 47 made of a magnetic material is disposed at the extreme of the N pole or the S pole, the magnetic flux that has passed through the ferromagnetic bodies 41, 51, 61 is stronger by the diffusion body 47 made of a magnetic body It is diffused in the radial direction of the magnetic members 41, 51, 61. The radially diffused magnetic flux is converged on the opposite surface side of the ferromagnetic members 41, 51, 61. At this time, the opposite surface side of the ferromagnetic material changes depending on the positions inside the housings 42, 52, 62 and outside the housings 42, 52, 62, but even if the magnetic flux is blocked by the blocking body 46, the magnetic path is diffused Since the magnetic flux directed to the outside of the housings 42, 52, 62 is generated because they are formed according to the bodies 43, 53, 63, many magnetic fluxes pass through the outside of the housings 42, 52, 62. The magnetic flux in the formed block body 34 has a long trajectory.

Therefore, since the integral value of the diffused magnetic flux generated on the outer periphery of the ferromagnetic members 41, 51, 61 is close to the integral value of the N pole or the S pole of the ferromagnetic members 41, 51, 61, it is magnetically attracted (repelled) There is almost no change in the strength of the suction force). As described above, the maximum magnetic flux density is suppressed, iron powder and cutting powder can be removed with a rag or an air gun, and the configuration can be made without reducing the magnetic flux on the surface.
Further, since the casings 42, 52, 62 made of diamagnetic material or nonmagnetic material are not used as the bottomed casings 42, 52, 62, there is nothing to suppress the magnetic field generated from the ferromagnetic material.

In the terminal structure of the ferromagnetic body according to the embodiment of the present invention, the diffusion bodies 43, 53, 63 and the blocking body 46 are formed such that the area becomes wider as the distance from the ferromagnetic bodies 41, 51, 61 increases. Since there is no need for sharp bending as the magnetic flux, the magnetic flux vector can be bent without increasing the magnetic flux density.
In addition, since the end structures of the ferromagnetic bodies 41, 51, 61 are formed by repeatedly laminating the diffusion bodies 43, 53, 63 and the blocking body 46, it is possible to suppress the change of the magnetic flux stepwise.
In the present embodiment, the casings 42, 52, 62 made of diamagnetic material or nonmagnetic material have been described on the assumption that they have a cylindrical shape, but in the case of practicing the present invention, the bottomed annular body As in the above, it may be in the form of a container with one side closed. In the case of the bottom, although the magnetic field is slightly weakened, the overall integral does not decrease significantly.

In the terminal structure of the ferromagnetic body according to the embodiment of the present invention, two pairs of ferromagnetic bodies 41, 51, 61 are embedded in the block body 34 formed of magnetic metal, and the remaining thickness is on the outer surface The S pole and the N pole are arranged at the position of δ and are installed so as not to be exposed. In the practice of the present invention, it is desirable that one block main body 34 be embedded with one pair of ferromagnetic members 41, 51, 61, two on the bottom surface 38 side and two on the erect surface 31 side. desirable.
Naturally, it is possible to embed three or more ferromagnetic members 41, 51, 61 on the bottom surface 38 side and three or more ferromagnetic members 41, 51, 61 on one side of the block main body 34.

The diameter and length of the ferromagnetic members 41, 51, 61 were determined by the length of the casings 42, 52, 62 made of diamagnetic or nonmagnetic material, and in particular, A plurality can be connected in series and used. Moreover, the thickness should just be able to connect a specific thing in parallel.
Furthermore, since the precision vice block 30 of the present embodiment is in close contact with the raised surface 31 and the bottom surface 38, a sense of security is strong. The precision vice block 30 according to the present embodiment does not move together in close contact with the upper surface 31 and the bottom surface 38, so that it can be prevented from sliding about 5 mm as in the prior art when the workpiece 5 is attached or removed. Since the precision vice block 30 of the present embodiment is in close contact with the elevation surface 31 and the bottom surface 8 is prevented from floating by the magnetic force, high accuracy can be maintained.
As described above, when the workpiece 5 is set in the precision vice block 30, the precision vice block 30 does not move, so that it can be fixed accurately. In addition, iron powder, cutting powder, and the like are less likely to adhere to the surface of the precision vice block 30 after cutting. And, after finishing the processing, when the same workpiece 5 is put on continuously, it does not float or tend to move. Furthermore, since iron powder and cutting powder can be easily removed by blowing with an air gun, cleaning is easy because they can be removed.

Although any of the diffusers 43, 53, 63 and the blockers 44, 45, 47 may be on the side of the housings 42, 52, 62, the diffusers 43, 53, 63 may be on the side of the housings 42, 52, 62. Is more efficient. Similarly, if the casings 42, 52 and 62 are omitted, it is not efficient but implementation is possible. That is, it can have a formal configuration as a configuration in which the characteristic does not live.
In addition, when the blocking body 44, 54, 64 or a part of the surface side of the separation preventing body 65 is formed of the same magnetic metal as the block main body 34, the internal structure can not be seen from the surface. In particular, there is no difference in appearance, and only the functions can be characterized.

δ Remaining thickness 31 Elevated surface 32 Thick portion 34 Block main body 35 Insertion hole 38 Bottom surface 39 Thin portion 41, 51, 61 Ferromagnetic body 42, 52, 62 Housing 43, 53, 63 Diffuser 44, 54, 64 Blocking body 65 Release prevention body

Claims (3)

A body made of magnetic metal,
A ferromagnetic body housed in the body;
A casing made of a diamagnetic material or a nonmagnetic material disposed around an outer periphery of which the magnetic pole of the ferromagnetic material is a central axis;
A diffuser made of a magnetic material laminated at an end of the ferromagnetic material in the direction of the magnetic pole;
A terminal structure of a ferromagnetic body, comprising: a diamagnetic body or a blocking body made of a nonmagnetic body disposed on the antiferromagnetic side of the diffuser.   The terminal structure of a ferromagnetic body according to claim 1, wherein the area of the diffusion body and the blocking body is increased as the distance from the ferromagnetic body increases.   The terminal structure of a ferromagnetic body according to claim 1 or 2, wherein the diffuser and the blocking body are repeatedly stacked.

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