JP2002218730A - Linear motor fitted with core, its manufacturing method, cooling member used for its production, and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coil cooling means which deals with heavy-load operation, under severe conditions, of a linear motor fitted with cores and composed of a moving element of an armature and a stator, where fields consisting of permanent magnets are formed. SOLUTION: The moving element of an armature has constituting, having specified gaps between adjoining magnetic poles around which coils, are wound. A cooling means for the coils and the magnetic poles of the moving element is composed of two sets of cooling pipes for pipelines, which are in the shape of a ladder as a whole and are composed of coolant supply pipes and discharging pipes placed in parallel, and crossover pipes for pipelines which are arranged perpendicularly to the direction of the supply pipes and the discharging pipes being in parallel, have the same pitch as that of the magnetic poles, have a thickness which enables them to fit very closely into the gaps between adjoining magnetic poles around which the coils are wound, and are connected to the supply pipes and the discharging pipes at their both ends. The supply pipe and the discharging pipe of each set of cooling pipes stretch and are brought in contact with side surfaces of the armature perpendicular to magnetic pole surfaces of each armature means along the direction of movement, and each crossover pipe is inserted into each gap between the magnetic poles from the magnetic pole side and is fitted closely, to form them into a combined body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor of a core type in which, for example, two stators face each other and a mover moves between them in a direction perpendicular to the facing direction. Frequent movement of speed is repeated, and high-precision positioning is required even with high load, for example, a linear motor used for a machine tool or FA equipment and a method for manufacturing the same, and a cooling member used for producing the linear motor and It relates to the manufacturing method.

[0002]

2. Description of the Related Art A linear motor with a core as described above is
Since the gap suction force canceling structure is used, the mechanical deformation can be canceled and the accuracy is good. By using the armature core split type, the material yield is improved and the productivity is improved. Furthermore, the use of a high-density winding system (single winding) in which a coil is aligned and wound directly on a core using a split core structure has many advantages, such as reduced heat generation, and the use thereof has been widespread.

[0003] Such a cored linear motor includes left and right parallel field forming means in which a plurality of permanent magnets are fixed at equal intervals inside so as to be sequentially different in polarity along the moving direction; The magnetic poles around which the coils are wound are formed side by side in the moving direction, and are arranged at the center of the field forming means and supported so as to be relatively movable in the moving direction. A structure comprising armature means formed to face each other via the gap,
There is a type of linear motor. Further, the field forming means comprises a yoke member having a T-shaped cross section perpendicular to the longitudinal direction, and a permanent magnet is fixed along the longitudinal direction to both surfaces of a yoke material column extending in a plate shape in the longitudinal direction. At least one pair of armature means in which the other armature means are arranged along the longitudinal direction such that the magnetic poles each having a coil wound therethrough via an air gap face the permanent magnets on both sides thereof. There is a linear motor of a structure and a type consisting of

However, in the linear motor having such a configuration, various technical means for reducing the generation of cogging force and the generation of thrust ripple have already been developed. Outside,
It has been proposed to use a refrigerant, a cooling pipe, and the like in various configurations and modes for removing generated heat. However, the structure is simple, assembly and production work is easy,
There has not yet been a linear motor configured for reliable and efficient cooling. For this reason, there has been a problem in the use and the like which frequently moves under a high load state with a high thrust.

To explain this conventional example, as a linear motor of the same type as the former type, for example, Japanese Patent Laid-Open No.
No. 0-257,750. According to this, the stator comprises two field yokes provided with permanent magnets, and a mover provided movably supported between the field yokes and provided with an iron core and windings. A linear motor, comprising a plurality of substantially T-shaped divided parts each having an edge on each of magnetic poles on both sides facing the permanent magnet, providing a connecting part between the magnetic poles, and winding each of the windings around the connecting part. The core is rigidly connected to each other at the connecting portion to form one mover. And as a configuration of a cooling member for this linear motor, (a) the winding is molded with resin and covered with a non-magnetic can,
(B) the winding is molded with a resin and a planar refrigerant conduit extending in the traveling direction of the mover is connected to the mover. Disclosed are a structure in which the structure is fixed to the mold resin surfaces on both sides, and a structure in which (c) a coolant passage is formed in the movable member of the mover base.

As a linear motor of the same type as the latter type, there is, for example, one described in Japanese Patent Application Laid-Open No. 11-27,926. According to this, a flat yoke portion, a plurality of permanent magnets arranged so that different poles alternately appear in the longitudinal direction of the yoke portion, and a plurality of armatures opposed to the permanent magnet via a gap. A linear motor having an armature portion formed by winding an armature coil around an iron core, wherein the yoke portion is fixed so that its longitudinal direction extends along a flat base portion, The magnets are fixed to both sides of the yoke part back to back, and the armature part is fixed to a table provided in parallel with the base part. As a configuration of the cooling member for the linear motor, (d) a configuration in which a refrigerant passage is provided in proximity to the surface of the armature coil of the armature portion;
A refrigerant passage according to (d) formed by mounting a refrigerant conduit in a cooling groove provided on a surface of the table facing the armature coil; and (f) the refrigerant passage. A structure in which an opening of the cooling groove is covered with a seal plate, and an O-ring is mounted between the seal plate and the table. (G) The refrigerant passage is connected to a table side of the armature coil. (H) a refrigerant conduit fixed to a surface of the armature iron core facing the permanent magnet; and (h) a refrigerant conduit fixed to a surface of the armature iron core facing the permanent magnet. And (i) a configuration in which a space between the refrigerant conduit and the armature coil described in (h) is filled with a resin having high thermal conductivity is disclosed.

[0007]

However, in the case of (a) disclosed in the former document, the molded winding portions located at predetermined intervals in the moving longitudinal direction are partially canceled. It is extremely difficult and impractical to cover in a shielded state or to connect a refrigerant so that a coolant can be circulated between adjacent ones. Further, in the above (b), not only the cooling conduit is separated from the winding and the cooling efficiency is poor, but also the cooling conduit is interposed between the air gaps of the linear motor. Has become large and the characteristics such as the efficiency of the linear motor have been significantly impaired, and cannot be adopted at all. In (c), the refrigerant passage is largely separated from the winding position, and the effect of cooling the winding cannot be expected.

Further, in the above (e) or (f), which is a specific configuration in which the cooling passage is provided close to the surface of the armature coil of the armature portion, as described in the above (d) disclosed in the latter document. The refrigerant passage or refrigerant conduit is provided in a cooling groove formed on the surface of the table facing the armature coil, and the armature coil is only in close proximity to a part thereof, In this case, the armature coil cannot be cooled. In the above (g), the above (e)
And even the table of (f) cannot be cooled.
Further, the above (h) and further (i) are the same as those of the above (b), and therefore cannot be adopted at all. In addition, the cooling effect provided by the cooling means can be sufficiently expected even in a configuration having a combination of the above (e) or (f), the above (g), the above (h), and further (i). Obviously, the linear motor cannot be operated as an actuator having excellent characteristics.

Further, Japanese Patent Laid-Open No. 2000-22
No. 8,860 discloses a linear motor of the same type as the former type, in which four upper and lower refrigerant conduits (e) and (g) provided on a mover of the above-mentioned Japanese Patent Application Laid-Open No. 11-27,926 are provided.
Although there is disclosed an arrangement in which the mover is connected in a single stroke, cooling on the side of the coil between adjacent magnetic poles is not performed, so that the cooling as a whole is still insufficient. Furthermore, Japanese Patent Application Laid-Open No. 9-238,449 discloses a configuration in which cooling tubes for individually cooling a plurality of cored drive coils are connected in a grid pattern. It cannot be said that the arrangement for contact with the pipe was sufficiently considered, and the cooling efficiency was not good.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a compact structure capable of removing heat generated in an armature coil of a cored linear motor, resulting in high response and high response. Producing a cored linear motor that ensures high-accuracy positioning control characteristics while frequently repeating high-speed movements during acceleration / deceleration and step movements and direction changes under high loads, a method of manufacturing the same, and the cored linear motor. It is an object of the present invention to provide a cooling member used as a functional component and a more preferable method of manufacturing a cooling member.

[0011]

SUMMARY OF THE INVENTION The above-mentioned object of the present invention is as follows.
(1) Two sets of field forming means in which a plurality of permanent magnets are arranged and fixed in sequence along the moving longitudinal direction so as to have different polarities, and magnetic poles made of laminated electromagnetic steel sheets wound with coils are formed in the moving direction. Armature means, and two air gaps formed by opposing magnets and magnetic poles are arranged in parallel and parallel to the moving direction, and arranged so that the magnetic attraction of both air gaps is offset. In a cored linear motor in which both means are moved linearly relative to the moving direction, the magnetic poles arranged in the moving direction in which the coil of the armature means is wound are located between magnetic poles adjacent in the moving direction. Cooling means for the two sets of armature means comprising the magnetic poles and the wound coils thereof is provided with a gap provided at predetermined intervals substantially parallel to the direction perpendicular to the moving direction, and the cooling means is provided in parallel with the coolant supply. A right angle to a direction parallel to the supply and discharge pipes, the same pitch as the magnetic poles, and a thickness that fits almost closely into a gap between adjacent magnetic poles around which the coil is wound. The cooling pipe is composed of two sets of cooling pipes each having a ladder shape, which is composed of a crossing pipe having both ends connected to a discharge pipe, and a supply pipe and a discharge pipe of each of the cooling pipes are perpendicular to a magnetic pole surface of each of the armature means. This is achieved by forming a connecting body that extends in contact with the armature side surface facing the opposite side along the moving direction, and that each of the crossover pipes is fitted and tightly fitted in each gap between the magnetic poles from the magnetic pole surface side. Is done.

Further, the above-mentioned object of the present invention is to provide: (2) left and right parallel field forming means in which a plurality of permanent magnets are fixed inside so as to be sequentially different poles along the longitudinal direction of movement; Electromagnetic steel sheets are laminated and fixed in a direction orthogonal to the opposing direction and the relative movement direction of the parallel field forming means, and are combined so as to move linearly relative to the center of left and right of the field forming means in the moving direction. Armature means, a coil-wound magnetic pole array formed so as to form a predetermined air gap facing each of the magnets on the left and right sides and to have a predetermined gap at a predetermined pitch arranged in the moving direction. In the linear motor with a core formed from the armature means having the armature means facing backward in the field opposing direction, the magnetic poles arranged in the moving direction in which the coil of the armature means is wound are between magnetic poles adjacent in the moving direction. Direction of movement Such direction are formed by allowed have a gap of substantially parallel predetermined intervals, the cooling means for the two sets of armature means comprising the magnetic pole and the winding coil,
A coolant supply pipe and a discharge pipe which are positioned in parallel, and which are perpendicular to the parallel direction of the supply and discharge pipes, have the same pitch as the magnetic poles, and are fitted in close contact with gaps between adjacent magnetic poles around which the coil is wound. And two sets of cooling pipes having a ladder shape as a whole, comprising a supply pipe having both ends connected to the supply / discharge pipe. The supply / discharge pipe and the supply pipe of the two sets of cooling pipes are This is attained by providing a linear motor which is fitted and tightly fitted to the outer peripheral side surface and the gap of each magnetic pole row facing the armature means from both magnetic pole face sides to form a combined body.

The object of the present invention is as described above. (3) A manifold is provided at one end of each of the coolant supply pipe and the discharge pipe, and the coolant is supplied from a coolant supply source, a supply pipe side manifold, a supply pipe, and the like. This is achieved by the linear motor according to the above (1) or (2), which sequentially flows to the transfer pipe, the discharge pipe, and the discharge pipe side manifold.

It is another object of the present invention to provide (4) a method in which the gap between adjacent coil-wound magnetic poles of the armature means is formed in a tapered shape expanding toward the magnetic pole surface, This is achieved by the linear motor according to the above (1) or (2), wherein the crossover pipe of the pipe is formed to have a tapered shape in a direction fitting into the gap between the magnetic poles.

Further, the object of the present invention is to provide (5) a method of manufacturing a linear motor having armature means arranged in the moving direction with magnetic poles wound with coils on the left and right sides facing backward. A core steel core is formed by laminating a predetermined number of punched steel sheets, each having a predetermined shape and dimensions, and a portion corresponding to a magnetic pole formed into a slightly tapered taper, and bonding or welding an electromagnetic steel sheet serving as an iron core of the child means. Forming a predetermined dimension to fit and fit as a wound coil on the magnetic pole,
A step of manufacturing a predetermined number of coil bodies having the shape and the number of windings using a winding form, having a length substantially equal to the length of the armature means having the iron core in the moving direction, and having a manifold at an end portion. The attached cooling liquid supply pipe and discharge pipe are provided in parallel with a width of an electrode wound with a coil in a steel sheet laminating direction perpendicular to the movement direction of the armature means, and the cooling liquid supply pipe and the discharge pipe are provided between the supply and discharge pipes. A step of providing a generally ladder-shaped cooling member provided with a braided connecting pipe having a complementary shape that fits into a gap in the moving direction between the magnetic poles around which the coil is wound; and a moving base. After each of the magnetic poles of the core-shaped iron core positioned and fixed, after inserting and mounting the coil body, a step of aligning and inserting a pair of the cooling member from both sides to the core-shaped iron core, Of the manifold at the end of the cooling member A method of manufacturing a linear motor with a core having a step of resin-molding the whole of the iron core side with respect to the moving base to a predetermined size and shape after the fixed mounting and the routing of the lead wire of each magnetic pole wound coil body, and It is achieved by doing.

Another object of the present invention is to provide (6) a linear motor primary member in which magnetic poles made of laminated electromagnetic steel sheets wound with coils are arranged at a predetermined pitch at a predetermined pitch in the moving direction. A cooling member to be incorporated, in which a supply pipe and a discharge pipe for a cooling liquid are provided in parallel with a gap of a width in a steel sheet laminating direction of a magnetic pole around which the coil is wound, and the coil is disposed between the supply and discharge pipes. A crossover pipe having a complementary shape is connected to and provided in a gap in the moving direction between the wound magnetic poles, so that the crossover pipe is configured as a whole in a ladder shape, and the cross section of the crossover direction is inserted into the magnetic pole row. The cooling member has a tapered rectangular shape, and is fitted so as to cover at least a part of the outer peripheral surface of the coil on the opposing side surface of the adjacent magnetic pole.

Further, the object of the present invention is as follows. (7) The cross-sectional shape of the crossover pipe is such that the shape of the outer periphery and the inner periphery of the cross section is a tapered rectangular shape tapering in the direction of insertion into the gap between the magnetic poles. The cooling member for a linear motor according to the above (6), wherein the inner peripheral hollow flow passage is further partitioned by separating the inner walls by a transverse rib at an intermediate portion in the longitudinal direction. Is achieved by:

Further, the object of the present invention is to provide (8) a method of manufacturing a crossover pipe as described in (6) or (7) above, wherein the base metal plate is coated with a low melting point brazing alloy. And cladding by hot rolling to produce both clad materials, and rolling the clad material so that the I- or E-shaped crossover pipe is convex toward the coating material side. This is achieved by a manufacturing method comprising a step of manufacturing a longitudinal strip, and a step of bringing a pair of the longitudinal strips into close contact with the convex side, bonding them by heating, and then cutting them to a predetermined length. .

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to an illustrated embodiment. The structure of the cored linear motor of this embodiment includes a stator comprising two field forming means provided with the aforementioned permanent magnets, and an iron core supported movably between the pair of field forming means. FIG. 1 is a front view, FIG. 2 is a front sectional view of a longitudinally intermediate portion (viewed along the line xx in FIG. 4), and FIG.
FIG. 3 is a horizontal cross-sectional view from below, with a portion cut away.
FIG. 4 is a side view showing a part of the armature means in section, and FIG.
FIG. 6 is a schematic diagram showing the field forming means in relation to the armature means, FIG. 6 is a side view showing the arrangement of the base, spacers and magnetic poles, and FIG. FIG. 8 is an additional perspective view, and FIG. 8 is an external perspective view of the entire cooling member used by being incorporated in an armature means in which magnetic poles on which coils are wound and mounted are arranged, and FIGS. 9 and 10 (A).
(B) is a front sectional view (a sectional view taken along the line Y-Y in FIG. 8) and a partial sectional view (a sectional view taken along the line Z-Z in FIG. 9) for explaining the configuration of the cooling member.

Reference numeral 1 denotes a field iron core in which a plurality of permanent magnets 2A and 2B are fixed at regular intervals along the inner moving longitudinal direction so as to have different polarities with NSNS. The stator of the linear motor having the side walls 1A and 1B of the opposing field forming means is constituted. As shown in the figure, the stator may be an integrally U-shaped unit that connects both side walls 1A and 2B.

Reference numeral 3 denotes an armature iron core laminated in a direction perpendicular to the longitudinal direction and perpendicular to the direction in which the parallel stator side walls 1A and 1B are opposed to each other. In the present embodiment, a predetermined number of thin electromagnetic steel sheets 3p made of silicon steel or the like and punched to predetermined dimensions in a comb shape on both sides as shown in the plan view of FIG. Is an armature iron core formed into a dense core iron core by bonding or welding. The armature iron core 3 has magnetic poles 3A, 3A.
A,. . . And 3B, 3B,. . . Are formed side by side with the permanent magnets 2A and 2B of the left and right stators at a small predetermined air gap of about 1 mm or less, and at predetermined intervals in the moving longitudinal direction, and each of the coils is wound. Armature means for forming each row of the magnetic poles 3A and 3B in the moving direction by inserting and inserting the coil bodies 4A and 4B in the state.

The armature means 3 includes a spacer 5 having a spacer head 5A on the front side.
The moving base 7 is connected to and held by the moving base 7
Are the side walls 1A and 1B of the stator 1 or
A and 1B are connected to and held by an unillustrated linear movement guide device 6A, 6B extending in the longitudinal direction, which is composed of a combination of a linear rail and a bearing with a built-in bearing ball or roller, for example. Moving base 7
And a movable element of a linear motor. In addition to the linear bearing, a linear movement guide such as a cross roller guide, an air slider, a V-groove, and sliding sliding is used. Reference numeral 8 denotes a molding resin in which the armature means 3 of the movable element is entirely molded with a resin having good thermal conductivity, preferably epoxy.

The mover armature means 3 is, for example, a combined body of split cores divided to correspond to the magnetic poles 3A and 3B like a linear motor of the former type (for example, Japanese Unexamined Patent Application Publication No. However, in the case of the present embodiment shown in FIG. 7, it is a laminated joined body of electromagnetic steel sheets 3p punched as a whole as a whole. Further, in order to reduce the number of manufacturing steps and facilitate manufacturing, in the case of the present embodiment shown in FIG. 7, each of the magnetic poles 3A and 3B is formed on a tapered surface 3C which is rarely tapered from the root to the tip. This is because the coil bodies 4A and 4B are desirably fitted to the magnetic poles 3A and 3B from the front end side by using the tapered surface 3C. The coil bodies 4A and 4B are separately formed in the same shape as each of the magnetic poles 3A and 3B, and are generally made of the same size or slightly larger. It is individually manufactured as coil bodies 4A and 4B by solidifying it into a molded state using a small amount of resin and removing it as necessary.

As will be described later, each magnetic pole row 3A,
And 3B are magnetic poles 3A and 3A adjacent to each other in the moving direction when the coil bodies 4A and 4B are fitted and mounted.
And the gap between the coil body surfaces between 3B and 3B has a tapered shape slightly widened toward the tip of the magnetic pole. The taper between the coil body surfaces is formed mainly depending on the configuration of the tapered taper 3C of each of the magnetic poles 3A and 3B.
B between the coil body and the foreskin insulating tape such as mold or the like, and further between the coil body and the inserted magnetic pole side surface, or between a cooling pipe passing pipe fitted in a gap between adjacent coil bodies described later and the coil body. If necessary, it can be increased by a film or a thin insulating material interposed therebetween. Further, for example, in the configuration shown in FIG. 2, the width in the vertical direction perpendicular to the moving direction of the magnetic poles 3A and 3B is set to each magnetic pole 3A.
In order to make the iron core of A and 3B tapered toward the tip end, for example, magnetic poles 3A, which are formed by laminating electromagnetic steel sheets in the movement direction on yoke portions extending in the movement direction,
And 3B can be realized by a configuration such as a divided iron core in which a predetermined pitch is arranged.

Thus, according to the present invention, in a state where the coil bodies 4A, 4B are fitted to the magnetic poles of the magnetic pole rows 3A, 3B, the magnetic poles 3A, 3A and 3B, 3B adjacent to each other in the moving direction. The magnetic poles 3A, 3B have gaps 9A, 9B of a predetermined width substantially parallel to the direction perpendicular to the moving direction.
Are set, and the dimensions such as the winding thickness of the coil bodies 4A and 4B are set. And the magnetic pole 3
A, 3B and the cooling means for the wound coil bodies 4A, 4B are entirely constituted by cooling pipes through which a coolant flows, and are composed of a ladder-shaped cooling member 10 as a whole,
As shown in FIGS. 2, 3 and 4, the magnetic pole arrays 3A, 3A, 3A,... And 3B, 3B, 3B,.
..., the whole is sandwiched from above and below by a long material of a ladder, and the rungs are just embedded or fitted in the gaps 9A and 9B between the adjacent magnetic poles.

That is, as shown in FIGS. 8 to 10, the cooling members 10A and 10B made of
Cooling liquid supply pipes 10A1, 1
0B1 and discharge pipes 10A2, 10B2,
At right angles to the parallel direction of the supply / discharge pipes 10A1, 10B1, 10A2, 10B2, the magnetic pole arrays 3A, 3A, 3A,
, 3B, 3B, 3B,... And the gaps 9A, 9 between adjacent magnetic poles on which the coil bodies 4A, 4B are mounted.
B has a tapered taper and a thickness so as to be fitted in close contact with B, and the supply pipes 10A1, 10B1 and the discharge pipes 10A2,
It consists of a plurality of crossover pipes 10C, both ends of which are connected between 10B2, and the whole is in the form of an integrated ladder. And the supply and discharge pipes 10A1, 10B1, 10A2, 10B2
Each end of the manifold block 11A1, 11A2,
11B1 and 11B2 are provided.

The structure of the cooling members 10A and 10B is a ladder-like structure in which all the cooling members are formed by using the cooling pipes, and has the above-described magnetic pole array in which coils are wound. When incorporated in the armature armature means, each magnetic pole covers the entire outer peripheral surface of its wound coil with a supply / discharge tube 10A1,
10B1, 10A2, and 10B2 and the bridge 10C, the heating coil body 4A,
The cooling structure of 4B can be said to be almost perfect. Further, if necessary, for example, in FIG. 2, the supply pipes 10A1 and 10B1 can be configured to be closer to or in contact with the base 7 so that the heat generated by the table side can be simultaneously removed by cooling the base 7.

The ladder-shaped cooling members 10A, 10B
As shown in FIG. 9 as a front sectional view (a sectional view taken along the line xx in FIG. 8), the supply pipes 10A1, 10B1 and the discharge pipes 10A2, 10B2 have a substantially rectangular cross section. The cross-sectional area of the flow passage of the pipe is formed sufficiently larger than the cross-sectional area of the flow of the transfer pipe 10C.
The cooling liquid is made to flow more evenly. In the cooling members 10A and 10B of the illustrated embodiment, the manifold blocks 11A1, 11B1, 11A2, 11
B2 is provided at one end in the moving direction of the armature means 3 of the linear motor so that the supply and discharge pipes for the coolant are integrated at one end, but the supply pipes 10A1, 10B1 and the discharge pipe 10 are provided.
Depending on the flow of the coolant in the A2, 10B2 and each of the transfer pipes 10C, for example, the manifold blocks 11A2, 11B2 on the discharge pipes 10A2, 10B2 side are provided at the other end side in the moving direction, and the partial cooling state. It is also possible to devise the uniformity of the temperature, or to measure the flow of the cooling liquid for concentratingly cooling the partial heat generating portion. For example, as shown in FIG. 8, it is not necessary to provide the entirety of the transfer pipe 10 </ b> C, and a configuration in which the transfer pipe 10 </ b> C such as a portion that generates less heat depending on the mode of excitation of the linear motor or a portion that easily dissipates heat may be omitted. good.

As shown in the cross-sectional views (A) and (B) of FIG. 10 (a sectional view taken along the line Z-Z in FIG. 9), the crossover pipe 10C is substantially rectangular, and has magnetic poles on which the coil bodies 4A and 4B are fitted. 3
A, and the width of the direction in which the magnetic poles are inserted into the gaps 9A, 9B between the tops of the magnetic poles has a width that covers the gap-side surfaces of the coil bodies 4A, 4B.
9B, and has a thickness that can be embedded and fitted, and has a taper that tapers in the insertion width direction. FIG.
In the case of (A), the cross-sectional flow path 10D is hollow as a whole, whereas in the case of (B), the cross-sectional flow path 10D has an inner wall partitioned by a rib 10E which crosses the flow path 10D in the middle. The two flow paths 10D1 and 10D2 are formed to prevent damage to the coil bodies 4A and 4B due to expansion and deformation of the transfer pipe 10C due to the pressure of the flowing cooling liquid. Since the contact area between the cooling liquid flowing through and the transfer pipe 10C increases, a measure is taken to increase the cooling efficiency.

The cooling members 10A and 10B are connected to the connecting manifold blocks 1 of the supply pipes 10A1 and 10B1.
1A1 and 11B1 each have a wiring outlet hole 12 or the like and are attached to a spacer head 5A which is an input / output terminal for wiring and piping, and supply the supplied cooling liquid from each manifold block 11A1 and 11B1 to each supply pipe 10A1. 1
0B1, the respective cooling members 10A and 1
Discharge pipes 10A2, 10B via the transfer pipe 10C of 0B
2. Manifold blocks 11A2, 11B2 of the discharge pipe
To the outside to cool the coil bodies 4A and 4B of the magnetic poles 3A and 3B from the outer periphery.

The cooling members 10A and 10B have pipe members,
Alternatively, as the manifold block or the like, an aluminum alloy extruded hollow tube or a die-cast body made of an aluminum alloy, which is a paramagnetic material, has little effect on magnetic flux, has good heat conduction, and is easy to bend and form. Used as Similarly, a diamagnetic copper alloy which has good heat conduction and hardly affects the magnetic flux is also useful because not only oil-based but also water or water-based refrigerant can be easily used.

The ladder-shaped cooling member 10
A and 10B are supply pipes 10A1 and 10B formed into predetermined cross-sectional shapes and dimensions, and formed with processing pipe 10C mounting holes and mounting ends of manifold blocks.
B1 and discharge pipes 10A2 and 10B2,
C and manifold block 11A1, 11B1, 11A
2, 10B2 are prepared and prepared in a predetermined number, and both are positioned, fixed, and brazed to be manufactured.

Next, a preferred method of manufacturing the transfer pipe 10C shown and described in FIGS. 10A and 10B, particularly, FIG. 10B will be described. This method comprises, first, a low melting point brazing alloy is placed as a coating material on a base metal base plate such as an aluminum alloy, and clad by hot rolling to produce both clad materials; Manufacturing the left and right vertical strips of the I-shaped or E-shaped convex pipe on the coating material side by rolling and forming a clad material; and associating a pair of the left and right vertical strips with the convex side. And then cutting the tube into a predetermined length after the tube material is adhered to the tube by heating. By this method, a pipe having the expansion-resistant rib 10E in the hollow flow path can be simply and reliably obtained as the transfer pipe 10C.

As described above, the mover armature means of the cored linear motor of the present invention is manufactured by the following procedure. An electromagnetic steel sheet serving as an iron core of the armature means is formed in a predetermined shape and dimensions, and a predetermined number of punched steel sheets each having a magnetic pole corresponding portion formed into a tapered taper are laminated and bonded or welded to form a core iron core. Forming; forming a predetermined number of coil bodies having a predetermined size, shape, and number of turns by using a winding form so as to be fitted and mounted as a wound coil on the magnetic pole; and having the iron core. A cooling liquid supply pipe and a discharge pipe having a length substantially equal to the length of the armature means in the moving direction and having a manifold attached to an end thereof, and a coil in a steel sheet laminating direction perpendicular to the moving direction of the armature means. A transfer pipe having a complementary shape fitted between the supply and discharge pipes and fitted in a gap in the moving direction between the magnetic poles on which the coil is wound is brazed and connected. Ladder shape as a whole A step of providing a cooling member, and after inserting and mounting the coil body with respect to each magnetic pole of the core-shaped iron core positioned and fixed to the base, a pair of the cooling members are placed on both sides of the core-shaped iron core. After the step of positioning, fitting, and mounting of the manifold at the end of the cooling member, and the routing of the lead wire of each magnetic pole wound coil body, the whole of the iron core side with respect to the base is transmitted to a predetermined size and shape. It is a thermosetting resin such as an epoxy resin having a good thermal property, and is manufactured through a step of forming a resin mold 8.

[0035]

As described above in detail, according to the structure of the linear motor of the present invention, the structure of the coil body of the armature means and the cooling means for the wound magnetic poles is compact, but the cooling member is formed on the surface of the coil body. Cooling is efficient and reliable because it is in full contact with most areas of
Therefore, the linear motor that moves at high speed with high response and high acceleration / deceleration can perform high-precision positioning operation with high load and frequent repetition of the direction change, thereby ensuring high controllability.

According to the method of manufacturing a linear motor with a core according to the present invention, a linear motor which can be used under severe conditions under a high load can be easily manufactured, and a motor having a predetermined performance can be manufactured reliably. It is something that will be.

Further, according to the structure of the cooling member incorporated in the cored linear motor mover electric means of the present invention and provided for manufacturing, the cooling pipe is present so as to surround the entire outer periphery of the magnetic pole wound coil. It has a relatively simple configuration called a ladder-like structure and exhibits a reliable cooling action.

[Brief description of the drawings]

FIG. 1 is a front view for explaining the configuration of a linear motor according to one embodiment of the present invention.

FIG. 2 is a front sectional view of a longitudinally intermediate portion (FIG. 4x).
-X-ray sectional view).

FIG. 3 is a horizontal cross-sectional view from below with a part cut away.

FIG. 4 is a side view similarly showing a part of an armature means in a cross section.

FIG. 5 is a schematic view similarly showing a part of the field forming means in relation to an armature means.

FIG. 6 is also a diagram showing a base, a spacer,
FIG. 4 is a side view showing a state in which the magnetic poles are provided.

FIG. 7 is a diagram showing a plan view of an armature iron core with a coil cross section added thereto.

FIG. 8 is an external perspective view of the entire configuration of the cooling member used in the present invention.

FIG. 9 is a front cross-sectional view of the cooling member (a cross-sectional view taken along the line YYY in FIG. 8).

10A and 10B are cross-sectional views of a portion (a cross-sectional view taken along the line Z-Z in FIG. 9), which is a different configuration example.

[Explanation of symbols]

 Reference Signs List 1, field forming means stator 1A, 1B stator side wall 2A, 2B permanent magnet 3 armature means mover 3p electromagnetic steel plate 3A, 3B magnetic pole 4A, 4B coil body 5 spacer 5A spacer head 6A, 6B linear movement guide device 7 Moving side base such as table 8 Resin mold 9A, 9B Clearance 10A, 10B Cooling member 10A1, 10B1 Supply pipe 10A2, 10B2 Discharge pipe 10C Crossover pipe 11A1, 11B1 Supply pipe side manifold block 11A2, 11B2 Discharge pipe side manifold block

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Claims (8)

[Claims] 1. Two sets of field forming means in which a plurality of permanent magnets are arranged and fixed in sequence in the moving longitudinal direction so as to have different polarities, and a magnetic pole made of a laminated electromagnetic steel sheet wound with a coil is moved in the moving direction. Armature means formed side by side, wherein two air gaps formed by facing magnets and magnetic poles are arranged in parallel and parallel to the moving direction, and so that the magnetic attraction of both air gaps is offset. In a linear motor with a core, wherein the two means are moved relatively linearly in the moving direction, the magnetic poles arranged in the moving direction in which the coil of the armature means is wound are magnetic poles adjacent to the moving direction. A cooling means for the two sets of armature means comprising the magnetic poles and the winding coils thereof is provided with a gap between them at predetermined intervals substantially parallel to a direction perpendicular to the moving direction. A liquid supply pipe and a discharge pipe, which are perpendicular to a direction parallel to the supply and discharge pipe, have the same pitch as the magnetic poles, and have a thickness that fits almost closely into a gap between adjacent magnetic poles around which the coil is wound; A cooling pipe comprising two sets of cooling pipes each having a ladder shape, each of which is composed of a supply pipe and a connecting pipe having both ends connected to the supply and discharge pipe, and a supply pipe and a discharge pipe of each of the cooling pipes are magnetic poles of each of the armature means. The crossover pipe extends and comes into contact with the armature side surface facing perpendicularly to the surface along the moving direction, and the connecting pipe is configured to fit tightly into each gap between the magnetic poles from the magnetic pole surface side. A linear motor comprising: 2. A left and right parallel field forming means fixed to the inside such that a plurality of permanent magnets become sequentially different poles along a moving longitudinal direction, and opposing directions and relative directions of the parallel field forming means. An electromagnetic steel sheet is laminated and fixed in a direction perpendicular to the moving direction, and armature means combined to move linearly relatively to the moving direction at the center of the left and right of the field forming means, wherein A coil-wound magnetic pole array formed so as to face each magnet to form a predetermined air gap and to be arranged in the moving direction and to have a predetermined gap at a predetermined pitch and to face in the field opposing direction. In the cored linear motor formed by the armature means, the magnetic poles arranged in the moving direction in which the coil of the armature means is wound are arranged in parallel with each other in a direction substantially perpendicular to the moving direction between magnetic poles adjacent to the moving direction. Gaps in intervals The cooling means for the two sets of armature means comprising the magnetic poles and the wound coils thereof comprises a cooling liquid supply pipe and a discharge pipe located in parallel, and a direction parallel to the supply and discharge pipes. At right angles to the magnetic poles, and having a thickness that fits in close contact with the gap between adjacent magnetic poles around which the coil is wound, and a crossover pipe connected at both ends to the supply / discharge pipe. It is composed of two sets of cooling pipes having a ladder shape as a whole, and the supply and discharge pipes and the transfer pipes of the two sets of cooling pipes are respectively connected to the outer peripheral side face and the gap of each magnetic pole row facing the armature means. A linear motor characterized in that it is fitted and tightly mounted from the magnetic pole surface side to form a combined body. 3. A manifold is provided at one end of each of the cooling liquid supply pipe and the discharge pipe, and the cooling liquid is supplied to a cooling liquid supply source, a supply pipe side manifold, a supply pipe, each passing pipe, a discharge pipe, and a discharge pipe side manifold. The linear motor according to claim 1, wherein the linear motor is sequentially circulated. 4. A gap between adjacent coil-wound magnetic poles of the armature means is formed in a taper expanding toward a magnetic pole surface, whereas a cooling pipe is provided in a gap between the magnetic poles. The linear motor according to claim 1, wherein the linear motor is formed to have a tapered shape in a fitting direction. 5. A method for manufacturing a linear motor having armature means arranged with predetermined intervals in the direction of movement with magnetic poles having coils wound on the right and left sides facing backward, wherein the iron core of the armature means is provided. The electromagnetic steel sheet that becomes the specified shape,
A step of laminating a predetermined number of punched steel sheets having a tapered tapered portion corresponding to the magnetic pole and forming a core iron core by bonding or welding; fitting and mounting the magnetic pole as a wound coil Manufacturing a predetermined number of coil bodies having a predetermined size, shape and number of turns using a winding form, and having a length substantially equal to the length of the armature means having the iron core in the moving direction. A coolant supply pipe and a discharge pipe having a manifold attached to an end thereof are provided in parallel with a magnetic pole wound around a coil wound in a steel sheet laminating direction perpendicular to a moving direction of the armature means, A step of preparing a cooling pipe having a ladder shape as a whole, which is provided with a connecting pipe having a complementary shape which fits in a gap in a moving direction between magnetic poles wound with the coil between the supply and discharge pipes. And positioning on the moving base After inserting and mounting the coil body to each magnetic pole of the fixed core-shaped iron core, aligning and inserting a pair of the cooling pipes from both sides to the core-shaped iron core; After the positioning and mounting of the manifold at the pipe end and the routing of the lead wire of each magnetic pole wound coil body, resin molding the entire iron core side with respect to the moving base to a predetermined size and shape. Method of manufacturing a linear motor. 6. A cooling member incorporated in a primary side member of a linear motor in which magnetic poles made of laminated electromagnetic steel sheets wound with coils are arranged at a predetermined pitch at a predetermined pitch in a moving direction. A supply pipe and a discharge pipe are provided in parallel at intervals of the width of the magnetic pole around which the coil is wound in the direction of lamination of the steel plates, and are provided between the supply and discharge pipes in a gap in the moving direction between the magnetic poles around which the coil is wound. A crossover pipe having a complementary shape is connected and provided so as to form a ladder shape as a whole, and the crossover section has a tapered rectangular shape whose cross section is tapered in a direction of insertion into the magnetic pole row, and is adjacent to the crossover pipe. A cooling member for a linear motor, wherein the cooling member is fitted so as to cover at least a part of an outer peripheral surface of a coil on opposite side surfaces of a magnetic pole. 7. The crossover pipe has a cross-sectional outer and inner periphery that is tapered and rectangular in a direction in which it is inserted into the gap between the magnetic poles. 7. The cooling member for a linear motor according to claim 6, wherein the path has a configuration in which the inner walls are connected and partitioned by a transverse rib at a middle portion in the longitudinal direction. 8. The method according to claim 6, wherein the low melting point brazing alloy is placed on a base metal plate as a coating material and hot rolled. Cladding to produce both clad materials; and rolling the clad material so that I
Manufacturing a vertical strip of the crossover pipe having a convex shape in the shape of a letter or an E, and a step of associating a pair of the vertical strips with each other on a convex side, heating and adhering to each other, and then cutting into a predetermined length. A method for manufacturing a cooling member for a linear motor, comprising: