JP2005311248A - Magnetic-path constituting sintered-member, and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a magnetic-path constituting sintered-member comprising magnetic members and a non-magnetic member, by improving its dimensional accuracy. <P>SOLUTION: The magnetic-path constituting sintered-member 15 comprises a non-magnetic member 18 made of a plate material and first and second magnetic sintered-members 16, 17 made of powder of a magnetic material as raw material and jointed by sintering respectively to one surface and the other surface of the non-magnetic member. It is desirable that a plurality of small holes 18a, etc. be formed in the non-magnetic member, to joint the first and second magnetic sintered-members to the non-magnetic member also by anchor effect, caused by the small holes 18a, etc. The manufacturing method of the magnetic-path, constituting sintered-member 15, has a process of injecting a first ferromagnetic raw material 16R to serve as the first magnetic sintered-member in a molding hole 31a of a compression molding die 31; a process of molding the surface of the raw material 16R by a molding plate 34; a process of mounting thereafter the non-magnetic member on the surface of the molded raw material 16R; a process of further injecting thereon a second ferromagnetic raw material 17R to serve as the second magnetic sintered-member; a process of molding a magnetic-path constituting non-sintered-member 15A by compressing the resultant intermediate; and a process of sintering the member 15A. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a magnetic path constituting sintered member used for an electromagnetic device such as an electromagnetic valve and a method for manufacturing the same.

  As a stator core that is a magnetic path constituent member of an electromagnetic drive portion of a solenoid valve, first and second solenoid housings made of a magnetic material are fitted and fixed at both ends of a sleeve made of a non-magnetic material at a predetermined distance. There is one in which fitting holes for slidably guiding and supporting the plunger are formed on the inner surfaces of both solenoid housings (see Patent Document 1). In this technique, the first and second solenoid housings molded in advance are fitted and fixed to both ends of the sleeve, and the concentric accuracy between the fitting holes formed in each solenoid housing is low. There is a problem that the sliding resistance of the plunger with respect to the hole increases, and the hysteresis during the operation of the solenoid valve increases.

  As a technique for solving such a problem, an annular portion that is radially opposed to the plunger of the housing portion of the integral structure fixed core made of a magnetic material that accommodates and supports the plunger so as to be able to reciprocate is provided so as not to impair the mechanical strength. There is a technique in which a magnetic path area is reduced and a magnetic resistance is increased by forming a plurality of through holes (see Patent Document 2). This through hole is formed by (1) laser irradiation, (2) cutting, (3) press working, (4) water jet machining, or the like. According to this technique, since the fitting hole that slidably guides and supports the plunger is formed in the integrally formed fixed core, the sliding resistance of the plunger with respect to the fitting hole is reduced, and the solenoid valve operates. Hysteresis is reduced. However, a plurality of through holes are formed by secondary processing in the annular part thinned by primary processing such as cutting, and this secondary processing requires a precise processing machine and a special processing machine. There is a problem that the manufacturing cost increases.

As a technique for solving such a problem, the upper and lower portions are made of a sintered material injection-molded body made of a ferromagnetic powder, and the central portion is made of a sintered material injection-molded body made of a non-magnetic powder. There is a technique in which a hollow tube-shaped integral injection molded body is formed and sintered to obtain an integral hollow tube (see Patent Document 3). According to this technique, since the fitting hole is formed in the hollow tube integrally formed by sintering, the sliding resistance of the plunger with respect to the fitting hole is reduced, and the hysteresis when the solenoid valve is operated is reduced. In addition, the manufacturing cost can be reduced because it is not necessary to process a precision processing machine or a special processing machine for increasing the magnetic resistance in a part of the hollow tube.
Japanese Laid-Open Patent Publication No. 01-242848 (page 2, upper right column, lines 5 to 11 and FIG. 1) JP 2001-263521 A (paragraphs [0017] to [0018], FIGS. 1 and 2) JP 2001-148308 A (paragraphs [0013] to [0021], FIGS. 2 and 3)

  However, in the technique of Patent Document 3 described at the end, the accuracy of the thickness of the nonmagnetic member at the center portion formed by sintering the nonmagnetic sintered material and the flatness of the joint surface with each magnetic member on both sides are low. Therefore, when used in an electromagnetic drive unit of a solenoid valve, there is a problem that variation in characteristics increases. In addition, since the process cost of the injection molding method is high and the molding cycle time is long, there is a problem that burdens such as product cost and capital investment cost are increased. The object of the present invention is to solve each of these problems.

  For this purpose, the magnetic path constituting sintered member according to the present invention is a first non-magnetic member made of a pre-formed plate material and a first non-magnetic member bonded to one surface of the non-magnetic member using a powder of magnetic material as a raw material. It comprises a magnetic sintered member and a second magnetic sintered member bonded to the other surface of the non-magnetic member by sintering using a magnetic material powder.

  2. The magnetic path constituting sintered member according to claim 1, wherein a hole or a groove is formed in a nonmagnetic member made of a plate material, and each of the first and second magnetic sintered members is formed of a hole or groove in a powdery state. It is preferable to be bonded to the non-magnetic member by entering and sintering.

  The magnetic path constituting sintered member according to claim 1 or 2, wherein the nonmagnetic member is a flat plate formed in an annular shape, and the first and second magnetic sintered members are in the axial direction of the nonmagnetic member. It is preferable that each surface is bonded.

  The method for producing a magnetic path constituting sintered member according to any one of claims 1 to 3 includes a predetermined amount that becomes a first magnetic sintered member in a molding hole formed in a compression mold as shown in claim 4. The first step of charging the powdery first ferromagnetic material and the surface of the powdered first ferromagnetic material inserted by inserting the forming jig into the forming hole up to a predetermined position A second step of forming the same shape as the surface of the nonmagnetic member, a third step of placing the nonmagnetic member on the surface of the molded first ferromagnetic material, and the placed nonmagnetic member A fourth step of charging a predetermined amount of the powdery second ferromagnetic material to be the second magnetic sintered member into the molding hole which is higher than the above, and the charged powdery first and second powders A non-sintered magnetic path component comprising a non-sintered first magnetic member, a non-sintered second magnetic member, and a non-magnetic member by compressing the ferromagnetic material and non-magnetic member of And a fifth step of heating the unsintered magnetic path constituent member to sinter the unsintered first and second magnetic members and to combine the respective magnetic members with the non-magnetic member. It is preferable to consist of a process.

  5. The method of manufacturing a sintered member having a magnetic path according to claim 4, wherein the compression mold has a circular cross-sectional shape of the molding hole, and an arbor is provided coaxially in the molding hole. In this case, the first and second ferromagnetic materials are preferably inserted between the forming hole and the arbor.

  As described above, according to the magnetic path constituting sintered member of the present invention, the nonmagnetic member at the center is made of a pre-formed plate, so that the accuracy of the thickness and the joining with the magnetic members on both sides are performed. The flatness of the surface is high. Therefore, the magnetic characteristics of the magnetic path constituting sintered member are constant, and even when used in an electromagnetic drive portion of a solenoid valve, the operating characteristics of the electromagnetic device are stable without variation.

  Holes or grooves are formed in a nonmagnetic member made of a plate material, and the first and second magnetic sintered members are formed into nonmagnetic members by sintering each powdery material entering the holes or grooves. According to the invention of the magnetic path constituting sintered member of claim 2, wherein the non-magnetic member and each magnetic member are the first and second magnetic sintered members in which the powdery material is in a hole or a groove. Since the bond strength is increased by the anchor effect due to entering and being sintered, a magnetic path structure sintered member with less risk of breakage is obtained.

  4. The magnetic path constituting sintered member according to claim 3, wherein the nonmagnetic member is a flat plate formed in an annular shape, and the first and second magnetic sintered members are respectively coupled to respective surfaces in the axial direction of the nonmagnetic member. According to the invention, since the magnetic path constituting sintered member is provided with the nonmagnetic member at the longitudinal intermediate portion of the cylindrical magnetic member, the electromagnetic valve for supporting the plunger slidably by the center hole is provided. A magnetic path constituting sintered member suitable for the stator core is obtained.

  According to the invention of the method for producing a magnetic path constituting sintered member according to claim 4 of the present invention, the first powdery powder of a predetermined amount charged in the molding hole formed in the compression molding die in the first step. The surface of the ferromagnetic material is formed into the same shape as the surface of the nonmagnetic member by the forming jig in the second step, and the nonmagnetic member is formed on the surface of the first ferromagnetic material thus formed in the third step. Since it is mounted, the nonmagnetic member is installed without tilting to an accurate position. And after charging a predetermined amount of the powdery second ferromagnetic material on the non-magnetic member in the fourth step, these are compressed in the fifth step to form an unsintered magnetic path component. Therefore, the position of the nonmagnetic member in the unsintered magnetic path constituent member is accurate and never tilted. Therefore, the magnetic path constituent sintered member obtained by sintering this unsintered magnetic path constituent member in the sixth step also has a constant magnetic property because the position of the nonmagnetic member is not inclined accurately. Even when used in an electromagnetic drive unit of a solenoid valve, the operating characteristics of the electromagnetic device are stable and without variations.

  5. The method of manufacturing a sintered member having a magnetic path according to claim 4, wherein the compression mold has a circular cross-sectional shape of the molding hole, and an arbor is provided coaxially in the molding hole. According to the magnetic path configuration sintered member manufacturing method of claim 5, the first and second ferromagnetic materials are inserted between the molding hole and the arbor. Since the sintered member has a cylindrical shape and is provided with a non-magnetic member in the middle in the longitudinal direction, a magnetic path configuration sintered member suitable for a stator core of an electromagnetic valve that slidably supports a plunger through a center hole is provided. can get.

  In the following, the best mode for carrying out the magnetic path structure sintered member and the manufacturing method thereof according to the present invention will be described with reference to the embodiments shown in FIGS. First, an explanation will be given of an electromagnetic valve in which a magnetic path constituting sintered member according to the present invention is applied to a stator core with reference to FIG. This electromagnetic valve is composed of an electromagnetic drive unit 10 and a valve unit 20 provided coaxially with each other.

  The electromagnetic drive unit 10 includes a stator 11 and a plunger 19, and the stator 11 includes a stator core (magnetic path constituting sintered member) 15, an electromagnetic coil 13, and a cover 12. The stator core 15 has a nonmagnetic member 18 formed by punching a flat plate of a nonmagnetic material such as austenitic stainless steel in an annular shape and a magnetic material powder such as pure iron or ferrite in the axial direction of the nonmagnetic member 18. The cylindrical first magnetic sintered member 16 formed by sintering on the surface of the first magnetic sintered member 16 and bonded by diffusion bonding, and similarly, the axial direction of the nonmagnetic member 18 using a powder of a magnetic material such as pure iron or ferrite as a raw material The cylindrical second magnetic sintered member 17 is formed on the other surface by sintering and bonded by diffusion bonding.

  The members 16 to 18 that are integrally joined to form the cylindrical stator core 15 have the same inner diameter and outer diameter (except for the flange portion 15c described below), and a continuous center hole 15b is formed on the inner surface of the stator core 15. In addition, a flange portion 15c is integrally formed at an end portion of the second magnetic sintered member 17 which is on the outer side in the axial direction. In this embodiment, the nonmagnetic member 18 made of a plate material is formed with a plurality of (for example, four) small holes 18a (see FIG. 3) penetrating the plate material, and sintered on each surface of the nonmagnetic member 18. The first and second magnetic sintered members 16 and 17 formed by the above-described method also enter into each small hole 18a and are sinter-bonded to each other, and are further firmly bonded to the non-magnetic member 18 by an anchor effect.

  A cylindrical electromagnetic coil 13 is provided on the outer periphery of the stator core 15, and the stator core 15 and the electromagnetic coil 13 have a bottomed cylindrical shape provided on the outside thereof, and the first magnetic sintered member 16 and the second magnetic sintered member. The outer end of the member 17 in the axial direction is covered with a magnetic cover 12 that magnetically connects the members 17. The plunger 19 is entirely made of a magnetic material, and is slidably guided and supported in the center hole 15 b of the stator core 15. One end of the plunger 19 is located near the nonmagnetic member 18.

  The valve portion 20 includes a valve sleeve 21 and a spool 22 slidably fitted and supported in a valve hole 21a formed coaxially with the valve sleeve 21. The valve sleeve 21 has a flange portion at one end thereof. Abutted against the flange portion 15 c of the stator core 15 and caulked by the open end portion of the cover 12 and fixed coaxially with the stator core 15. The spool 22 is urged toward the electromagnetic drive unit 10 by a spring 24 interposed between the spool 22 and a plug member 23 screwed into the rear end of the valve sleeve 21, and a shaft portion protruding from the tip of the spool 22 is applied to the plunger 19. The plunger 19 is brought into contact with the inner bottom surface of the cover 12 in a non-operating state.

  When the electromagnetic coil 13 is energized, the stator 11 having the stator core 15 and the cover 12 as magnetic path constituent members is magnetized according to the energization amount, and the plunger 19 whose one end is located near the nonmagnetic member 18 of the stator core 15 is attracted. The spool 22 is moved against the spring 24 together with the plunger 19 to control opening and closing of a plurality of ports formed in the valve sleeve 21.

  According to the embodiment of the magnetic path constituting sintered member described above, the non-magnetic member 18 at the center portion of the stator core 15 is made of a pre-formed plate material, so that the accuracy of thickness and the joining to the magnetic members on both sides are made. The flatness of the surface is high. Accordingly, the magnetic characteristics of the stator core 15 are constant, and the operating characteristics of the solenoid valve are stable with little variation.

  In the above-described embodiment, a plurality of small holes 18a penetrating the plate material are formed in the nonmagnetic member 18 made of the plate material, and the first and second magnetic sintered members 16 and 17 are each made of powdery ferromagnetic material. Since the anchor effect caused by 16R and 17R entering into the small hole 18a and being sintered to each other is also coupled to the nonmagnetic member 18, the coupling strength between the nonmagnetic member 18 and each of the magnetic members 16 and 17 is increased. Get higher. Therefore, the stator core 15 with less risk of breakage is obtained.

  Further, in the above-described embodiment, the example in which the present invention is applied to the cylindrical stator core 15 used for the electromagnetic valve has been described. However, the present invention is not limited to this, and a cylindrical shape or solid shape having an arbitrary cross-sectional shape. It is also possible to apply to a cylindrical magnetic path constituting sintered member having a cylindrical shape or a straight or curved rod shape having an arbitrary cross-sectional shape.

  Next, with reference to FIG. 2 and FIG. 3, a method for manufacturing a magnetic path constituent sintered member used as the stator core 15 of the electromagnetic valve described above will be described. As shown in FIG. 2, a manufacturing die 30 used for manufacturing the stator core 15 is slidably fitted to a compression molding die 31 in which a cylindrical molding hole 31a is vertically formed and a lower portion in the molding hole 31a. A bush 32 supported together and an arbor 33 slidably fitted and supported in the bush 32 so as to be coaxial with the molding hole 31a are provided. The dimension and shape of the cross section of the bush 32 are substantially the same as the planar dimension and shape of the non-magnetic member 18 formed by punching and forming the ring. A guide hole 38a having a diameter larger than that of the arbor 33 and smaller than that of the molding hole 31a is vertically formed in the support base 38 that supports the manufacturing die 30, and a support rod 39 that is slidably fitted and supported in the guide hole 38a. Is biased upward by a spring (not shown) and stopped at a position where the upper end surface thereof coincides with the upper surface of the support base 38. The production mold 30 is used while being supported on a support base 38 so that the arbor 33 is coaxial with the guide hole 38a.

  The manufacturing method of the magnetic path structure sintered member of this embodiment consists of six steps, the first step to the sixth step. The forming jig 34 used in the second step has a cylindrical protrusion 34a that can be inserted between the forming hole 31a and the arbor 33 without any substantial gap at the lower end, and a flange portion on the base side. 34b is formed. The pressurizing punch 35 used in the fifth step has a size and shape that can be inserted into the forming hole 31a substantially without a gap.

  First, in the first step, as shown in FIG. 2 (a), the first magnetic sintered member 16 and the arbor 33 are formed between the forming hole 31a of the manufacturing die 30 supported on the support base 38 as described above. A predetermined amount of the powdered first ferromagnetic material 16R (the material is pure iron or ferrite) is charged. In the subsequent second step, as shown in FIG. 2 (b), the cylindrical protrusion 34a at the tip of the forming jig 34 is placed between the forming hole 31a and the arbor 33, and the cylindrical protrusion 34a of the forming jig 34 is inserted. The flange portion 34b is inserted to a predetermined position where it comes into contact with the upper surface of the compression mold 31. The surface of the powdery first ferromagnetic material 16R charged in the first step by the tip surface of the cylindrical protrusion 34a is formed in the same shape as the surface of the nonmagnetic member 18 made of the plate material described above. However, the compressibility of the powdery first ferromagnetic material 16R in this state is slight.

  In the subsequent third step, as shown in FIG. 2 (c), a flat plate of a non-magnetic material such as austenitic stainless steel is punched into a ring shape, and a plurality of small holes 18a penetrating the plate material are punched as described above. The formed nonmagnetic member 18 is placed on the surface of the first ferromagnetic material 16R formed in the third step. In the subsequent fourth step, as shown in FIG. 2 (d), the gap between the forming hole 31a of the manufacturing die 30 and the arbor 33 above the nonmagnetic member 18 placed on the first ferromagnetic material 16R. Then, a predetermined amount of the powdery second ferromagnetic material 17R (the material is the same as the first ferromagnetic material 16R) to be the second magnetic sintered member 17 is charged.

  In the subsequent fifth step, as shown in FIG. 2 (e), the press punch 35 is fitted into the forming hole 31a and abuts against the upper end of the arbor 33, and as shown in FIG. Thus, the pressure punch 35 is inserted into the molding hole 31a to a predetermined position, and the powdered first and second ferromagnetic materials 16R and 17R and the nonmagnetic member 18 are compressed and integrated with each other. An unsintered magnetic path constituting member 15A composed of the unsintered first magnetic member 16A, the unsintered second magnetic member 17A, and the nonmagnetic member 18 is molded. In this state, the arbor 33 and the support rod 39 are pushed by the pressure punch 35 and moved downward against the biasing force of the spring.

  The formed unsintered magnetic path constituting member 15A is taken out from the production mold 30, and the taken out unsintered magnetic path constituting member 15A is provided on both sides in the axial direction of the non-magnetic member 18 in which a flat plate is formed into an annular shape. A cylindrical member is formed by connecting unsintered magnetic members 16A and 17A obtained by compressing the ferromagnetic materials 16R and 17R. The unsintered magnetic path component member 15A is weak as it is as the non-magnetic member 18 and the unsintered magnetic members 16A and 17A are pressure-bonded, but is heated and sintered in the subsequent sixth step. Thus, as shown in FIG. 3, the first and second magnetic members 16A and 17A, which have not been sintered, are joined by diffusion bonding without substantially changing the dimensional shape. The magnetic sintered members 16, 17, and the magnetic sintered members 16, 17 and the nonmagnetic member 18 are also joined by diffusion bonding, and the magnetic path constituting sintered member 15 having sufficient strength that can be used as a stator core, Become.

  In this embodiment, the nonmagnetic member 18 made of a plate material is formed with a plurality of small holes 18a penetrating the plate material, and the first and second magnetic sintered bodies formed on each surface of the nonmagnetic member 18 by sintering. The members 16 and 17 also enter into the small holes 18a and are bonded to each other by sintering. Due to the anchor effect, the members 16 and 17 are also bonded to the nonmagnetic member 18, so that the bonding strength between the nonmagnetic member 18 and each magnetic member is further increased. Get higher. The center hole 15b of the stator core 15 is finished if necessary to improve accuracy.

  In the embodiment in which the magnetic path constituent sintered member according to the present invention shown in FIG. 1 is applied to the stator core 15 of the electromagnetic valve, an example in which the flange portion 15c is integrally formed at one end of the stator core 15 is shown. In the embodiment of the manufacturing method shown in FIGS. 2 and 3, an example in which such a flange portion is not formed is shown. However, in the case of having such a flange, the first ferromagnetic member is compression-molded in advance using a manufacturing mold different from the manufacturing mold shown in FIG. It can be easily formed by transferring to a mold as shown in FIG. 2 and manufacturing in the same manner as in FIGS. 2 (c) to 2 (f).

  In the embodiment of the manufacturing method shown in FIGS. 2 and 3, the example in which the coupling strength between the magnetic members 16 and 17 is improved by the anchor effect by the small holes 18 a formed in the nonmagnetic member 18 has been described. In order to improve the coupling strength by such an anchor effect, a plurality of (for example, four) small grooves 18b are formed on the outer peripheral edge (or inner peripheral edge) of the nonmagnetic member 18 instead of the small holes 18a as shown in FIG. Can also be obtained.

  According to the manufacturing method of the magnetic path structure sintered member of the above-described embodiment, a predetermined amount of the powdery first ferromagnetic material inserted in the first step inserted between the forming hole 31a and the arbor 33. The surface of 16R is formed in the same shape as the surface of the nonmagnetic member 18 by the forming jig 34 in the second step, and the nonmagnetic member is formed in the third step on the surface of the first ferromagnetic material 16R thus formed. Since 18 is mounted, the nonmagnetic member 18 is installed without being inclined to an accurate position. Then, after a predetermined amount of the powdery second ferromagnetic material 17R is loaded on the nonmagnetic member 18 placed in this way in the fourth step, the first and second ferromagnetic materials 16R, Since the unsintered magnetic path component 15A is formed by compressing the 17R and the nonmagnetic member 18 with the pressure punch 35, the position of the nonmagnetic member 18 in the unsintered magnetic path component 15A is accurate and inclined. There is nothing. Accordingly, the magnetic path constituting sintered member 15 obtained by sintering the unsintered magnetic path constituting member 15A also has a non-inclined position of the nonmagnetic member 18, so that its magnetic characteristics are constant. When used in the stator core 15 of the electromagnetic drive unit of the electromagnetic valve, a stable electromagnetic valve with no variation in operating characteristics can be obtained.

  In the manufacturing method of the magnetic path structure sintered member of the above-described embodiment, in the fifth step, the arbor 33 is pushed by the pressure punch 35 and moved downward. A cylindrical projection similar to the portion 34a is provided on the pressure punch 35, and this cylindrical projection is inserted between the molding hole 31a and the arbor 33 to form powdered first and second ferromagnetic materials 16R and 17R. The nonmagnetic member 18 may be compressed to form an unsintered magnetic path component member 15A. In this way, since the arbor 33 does not move downward in the fifth step, the bush 32 and the arbor 33 may be press-fitted and fixed in the molding hole 31a, and the guide hole 38a and the support rod are formed in the support base 38. It is not necessary to provide 39.

  Moreover, although the manufacturing method of the magnetic path structure sintered member of embodiment mentioned above demonstrated per the example which applied the manufacturing method of this invention to manufacture of the cylindrical magnetic path structure sintered member 15, the manufacturing method of this invention is However, the present invention is not limited to this, and the present invention can also be applied to the manufacture of a cylindrical magnetic path constituting sintered member having an arbitrary cross-sectional shape, a solid cylindrical shape, or a rod-shaped magnetic path configuration having an arbitrary cross-sectional shape. In such a case, the cross-sectional shape of the molding hole 31a and the arbor 33 of the compression mold 31 may be changed, or the bush 32 and the arbor 33 may be removed.

It is a longitudinal cross-sectional view which shows one Embodiment at the time of applying the magnetic path structure sintered member by this invention to a solenoid valve. It is a longitudinal cross-sectional view which shows one Embodiment at the time of applying the manufacturing method of the magnetic path structure sintered member by this invention to manufacture of a cylindrical magnetic path structure member. It is a perspective view of the magnetic path structure sintered member manufactured by the manufacturing method shown in FIG. It is a perspective view equivalent to FIG. 3 of the modification of the magnetic path structure sintered member by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 ... Magnetic path structure sintered member (stator core), 15A ... Unsintered magnetic path structure member, 16 ... 1st magnetic sintered member, 16A ... Unsintered 1st magnetic member, 16R ... 1st ferromagnetic Material: 17 ... second magnetic sintered member, 17A ... unsintered second magnetic member, 17R ... second ferromagnetic material, 18 ... non-magnetic member, 18a ... hole (small hole), 18b ... groove (small groove) ), 31... Compression mold, 31 a... Molding hole, 33. Arbor, 34.

Claims (5)

A non-magnetic member made of a pre-formed plate, a first magnetic sintered member bonded to one surface of the non-magnetic member by sintering using a magnetic material powder, and the magnetic material powder as a raw material. A magnetic path constituting sintered member comprising a second magnetic sintered member bonded to the other surface of the nonmagnetic member by sintering. 2. The magnetic path constituting sintered member according to claim 1, wherein a hole or a groove is formed in the nonmagnetic member made of the plate material, and each of the first and second magnetic sintered members is made of the powdery material. A magnetic path constituent sintered member characterized in that it is joined to the non-magnetic member by entering into a hole or groove and being sintered. 3. The magnetic path constituting sintered member according to claim 1, wherein the nonmagnetic member is a flat plate formed in an annular shape, and the first and second magnetic sintered members are axes of the nonmagnetic member. A magnetic-path-sintered sintered member characterized in that it is coupled to each surface to be a direction. The method for producing a sintered member having a magnetic path according to any one of claims 1 to 3, wherein a predetermined amount of powder that becomes the first magnetic sintered member is formed in a molding hole formed in a compression mold. A first step of charging the first ferromagnetic material, and a surface of the powdered first ferromagnetic material inserted by inserting a forming jig into the forming hole up to a predetermined position. A second step of forming the same shape as the surface of the nonmagnetic member made of a plate material; a third step of mounting the nonmagnetic member on the surface of the molded first ferromagnetic material; A fourth step of charging a predetermined amount of powdery second ferromagnetic material to be the second magnetic sintered member into the molding hole above the nonmagnetic member; and the charged powder And compressing the first and second ferromagnetic materials and the nonmagnetic member to form an unsintered first magnetic member and an unsintered second magnetic member, A fifth step of forming an unsintered magnetic path constituent member made of a magnetic member, and heating the unsintered magnetic path constituent member to sinter the unsintered first and second magnetic members. And a magnetic path constituting sintered member manufacturing method characterized by comprising a sixth step of coupling each magnetic member and the non-magnetic member. 5. The method for manufacturing a sintered member having a magnetic path according to claim 4, wherein the compression mold has a circular cross-sectional shape of the molding hole, and an arbor is provided coaxially in the molding hole. In the fourth step, the first and second ferromagnetic materials are inserted between the molding hole and the arbor, and the method for manufacturing a magnetic path constituent sintered member.

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