JPH06251949A - Hot pressing device - Google Patents

Abstract

PURPOSE:To automate the hot pressing process in the assembling work of a rotary transformer, and to provide a hot pressing device with which a plurality of core grooves can be pressed uniformly. CONSTITUTION:The title hot pressing device, to be used to adhere a coil to the groove of a core 11, is provided with a center pin 33 which is engaged to the center hole 13 of the core 11, press rings 35 and 37 used to press the coil arranged in the groove of the core 11, an ejection pin 39 which presses the core 11 to separate from the press rings 35 and 37. The press pins 35 and 37 have a plurality of ring parts 35 and 37 corresponding to the groove of the core 11. The ring parts 35 and 37 are formed in such a manner that they can be moved independently to axial direction corresponding to each groove of the core 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot press machine suitable for use in a rotary transformer assembling process, and more particularly in a process of mounting a coil in a groove of a core with an adhesive.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a rotary transformer. The rotary transformer has a core 11 and a coil 21 attached to the core 11. The core 11 has a central hole 13. A plurality of annular grooves 1 arranged concentrically on the surface of the core 11.
5 and a groove 17 extending in the radial direction are formed. The radial grooves 17 each have a radial length which reaches the corresponding annular groove 15.

The coil 21 has an annular portion 23 and a lead portion 25 extending from the annular portion 23. The annular portion 23 is arranged in the annular groove 15 of the core 11 and the lead portion 25 is arranged in the radial groove 17.

The process of assembling the conventional rotary transformer will be described with reference to FIGS. First, as shown in FIG. 5A, the adhesive 19 is applied to the groove 15 of the core 11. Next, as shown in FIG. 5B, the solvent portion of the adhesive 19 is evaporated and turned into a gel by blowing hot air onto the adhesive 19. Next, as shown in FIG. 5C, the coil 21 is loaded into the groove 15 of the core 11 and temporarily bonded.

FIG. 6D shows a state in which the coil 21 is thus temporarily adhered to the groove 15 of the core 11. Next, as shown in FIGS. 6E and 6F, the coil 21 is pressed by the pressing head 27 and completely bonded to the groove 15 of the core 11.

Finally, the pressurizing head 27 makes the groove 1 of the core 11
Then, the rotary transformer is completed. The steps shown in FIGS. 6E and 6F are referred to as hot pressing. In such a hot pressing process, the core 11 or the pressure head 27 is heated, so that the adhesive 19 is hardened at a high temperature.

[0007]

Conventionally, such hot pressing process has been manually performed. That is, the relative position between the pressure head 27 and the groove 15 of the core 11 is manually adjusted in order to engage the protrusion 27A of the pressure head 27 with the groove 15 of the core 11. Therefore, when the width dimension of the groove 15 of the core 11 is small, adjusting the position of the pressure head 27 or the core 11 is a time-consuming operation.

When an outer diameter chuck is used for positioning the core 11, centering is performed on the basis of the outer peripheral surface of the core 11, so that the outer peripheral surface of the core 11 does not have a good roundness, or the core 11 has a round shape. If the outer peripheral surface of is decentered with respect to the center, there is a drawback that accurate centering cannot be obtained.

On the contrary, when the inner diameter chuck is used for positioning the core 11, the same inner diameter chuck has to be used for other core holding devices such as a conveying jig for the core 11, which is expensive. There are drawbacks.

Further, the conventional pressure head 27 is formed so as to have a projection 27A corresponding to the groove 15 of the core 11 and is integrally formed. On the other hand, the groove 15 of the core 11
Of the coil 2 placed on the adhesive 19 depending on the depth of the adhesive, the thickness of the applied adhesive 19, the error in the coil diameter, and the like.
The height of 1 changes. Therefore, the plurality of grooves 15 of the core 11
However, there is a drawback in that it cannot be uniformly pressed.

In view of this point, the present invention automates the hot pressing process of the rotary transformer assembling work,
It is an object of the present invention to provide a hot press device capable of uniformly pressing a plurality of grooves 15.

[0012]

According to the hot pressing apparatus of the present invention, for example, as shown in FIG.
In a hot press device used to bond the coil 21 to the core 21, a center pin 33 for engaging the center hole 13 of the core 11 and a pressure for pressing the coil 21 arranged in the groove 15 of the core 11 The ring 35, 37 and the eject pin 39 which presses the core 11 against the pressure rings 35, 37 so as to separate the core 11 from each other.
Reference numerals 5 and 37 include a plurality of ring portions 35 and 37 corresponding to the grooves 15 of the core 11, and each of the ring portions 35 and 37 independently moves in the axial direction corresponding to each of the grooves 15 of the core 11. Is configured to be able to.

According to the hot pressing apparatus of the present invention, as shown in FIG. 1, for example, the pressure rings 35 and 37 are elastically biased by silicon rubber.

According to the hot pressing apparatus of the present invention, for example, as shown in FIG. 1, the pressure rings 35 and 37 are made of a heat conductor.

According to the hot pressing apparatus of the present invention, for example, as shown in FIG. 1, the center pin 33 has a tapered surface 33C at its tip and is urged by the spring 61 along the axial direction.

According to the hot pressing apparatus of the present invention, as shown in FIG. 1, for example, the center pin 33 and the pressure ring 3 are provided.
5 and 37 are attached to the head portion 91, and the head portion 9
1 is replaceably mounted.

[0017]

According to the present invention, the center pin 33 positions the center of the core 11, and the two pressurizing rings 35 and 37 capable of independently moving in the axial direction pressurize the coil 21 in the groove 15 of the core 11. Therefore, each coil 21 can be uniformly pressed.

[0018]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3, the same parts as those in FIGS. 4 to 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows the main part of the hot pressing apparatus of the present invention, that is, the head part. The figure shows a state in which the head portion of the hot press device is engaged with the core 11. The head portion has a main body 31, a center pin 33, pressure rings 35 and 37 arranged around the center pin 33, and an eject pin 39.

The center pin 33 is movable along the axial direction, and has a shaft portion 33A arranged in the center hole of the main body 31 and an engaging portion 33B attached to the tip of the shaft portion 33A.
The engagement portion 33B is, as shown in the drawing, the center hole 13 of the core 11.
Has a tapered surface 33C that engages with. Center pin 33
The tapered surface 33C of the engaging portion 33B of the center hole 1 of the core 11
In the process of engaging with 3, the center position of the core 11 is positioned.

According to the present example, the pressure rings 35, 37 are constructed to have an axially movable inner ring 35 and an outer ring 37, such two rings 3.
The reference numerals 5 and 37 are separately provided so as to be movable relative to each other.

A suitable elastic member 41 is attached to the rear ends of the two rings 35 and 37, so that the two rings 35 and 37 are urged axially outward. For example, a silicone rubber sheet may be used as the elastic member 41.

As shown, the radially extending pin 4
3 are arranged such that the pins 43 extend from the circumference of the body 31 into the two rings 35, 37. By means of such a pin 43 the two rings 3
The rotational movement of 5, 37 can be prevented.

An appropriate number of, for example, four eject pins 39 are arranged around the center pin 33 and extend through the body 31 and the inner ring 35 to the core 11. The eject pin 39 is configured so that it can be moved in the axial direction by a suitable drive device as described later.

FIG. 2 shows details of the head portion of the hot press machine. The main body 31 has an annular first main body 31A and a second main body 31B having a disc-shaped portion, and an annular elastic member 41 is arranged between the two. Two rings 35, 3
7 are annular pressurizing parts 35 arranged on the outside in the axial direction, respectively.
A, 37A and projections 35B, 3 arranged axially inward
7B, the outer pressurizing portions 35A and 37A are the core 11
Is configured to engage with the annular groove 15 of the projection 35B,
37B is configured to engage with the elastic member 41.

The eject pin 39 extends through the second body 31B and the inner ring 35. The head portion is configured to be heated by a suitable heating device as will be described later in detail. Therefore, at least the main body 31 and the pressure rings 35 and 37 that form the head portion are formed of a heat conductor.

Next, the operation of the hot pressing apparatus of the present invention will be described with reference to FIGS. First, the core 11 is relatively moved along the axial direction toward the head portion of the hot press machine. The core 11 is in a state in which an adhesive is applied to the annular groove 15 of the core 11 as shown in FIG. 6D, and the coil 21 is mounted on the adhesive, and a suitable supporting device such as a pallet is used. It is located in.

As the core 11 moves toward the head portion along the axial direction, the engaging portion 33B of the center pin 33 engages with the center hole 13 of the core 11. Engagement part 33
In the process in which the tapered surface 33C of B is engaged with the central hole 13 of the core 11, the core 11 is free to move in the radial direction, so that the central axis of the core 11 is aligned with the central axis of the center pin 33. To be done.

The center pin 33 is urged axially outward by a suitable elastic device, and the core 11 is urged axially outward by the elastic device. Therefore, by moving the core 11 toward the head portion along the axial direction, the center pin 33 can slightly move inward in the axial direction against the biasing force of the elastic device.

Further, by moving the core 11 toward the head portion along the axial direction, the two rings 35,
The pressing portions 35A and 37A of 37 are engaged with the groove 15 of the core 11, whereby the coil 21 arranged in the groove 15 of the core 11 is pressed. The protrusions 35B and 37B of the two pressure rings 35 and 37 are in contact with the elastic member 41. Therefore, the movement of the core 11 in the axial direction causes the pressing ring 3 to move.
5, 37 can move slightly inward in the axial direction against the compressive force of the elastic member 41.

At this time, the inner ring 35 and the outer ring 3
It is possible to move axially inwardly independently of 7. For example, when there is an error in the depth of each groove 15 of the core 11, when the thickness of the adhesive applied to each groove 15 is different, when the diameter of the coil 21 arranged in each groove 15 is different, etc. , The inner ring 35 and the outer ring 37 move different distances.

Thus, in this example, the inner ring 35 and the outer ring 37 can move different distances, so that the coil 21 arranged in the groove 15 of the core 11 can be uniformly pressed. That is, when there is an error in the depth of each groove 15 of the core 11, when the thickness of the adhesive applied to each groove 15 is different, the coil 2 disposed in each groove 15 is different.
Even when the diameter of 1 varies, the coil 21 is uniformly pressed, so that the coil 21 is reliably bonded to each groove 15 of the core 11 with an adhesive.

Pressurizing portions 35A of the two rings 35 and 37,
37A is heated, and therefore, the pressurizing parts 35A, 37A
The heat is transferred to the coil 21. Therefore, the adhesive is pressed and cured under heating.

When the adhesive is hardened, the core 11 is removed from the hot press machine. The eject pin 39 is used to remove the core 11. As shown in FIG. 2, the eject pin 39 moves toward the core 11. That is,
The eject pin 39 moves axially outward and relative to the head portion, and comes into contact with the core 11 to move the core 11 axially outward.

Thus, by using the eject pin 39, the pressure portions 35A of the pressure rings 35, 37,
Even when 37A engages with the groove 15 of the core 11 or adheres to the adhesive, the core 11 can be easily removed by the hot pressing device.

Next, with reference to FIG. 3, the overall structure of the hot press machine of this example will be described. The above-mentioned head portion 91 is attached to the support plate 45. That is, the main body 31 of the head portion 91 is attached to the support plate 45 by the screws 47. The support plate 45 is composed of a heat conductor, and an appropriate heat source, for example, a heating device 49 is arranged inside the support plate 45. The support plate 45 is attached to the upper heat insulating plate 51 by screws 53.

Therefore, the heat from the heating device 49 is transmitted to the main body 31 of the head portion via the support plate 45, and further to the heating rings 35 and 37. Thus, the coil 21 arranged on the core 11 is heated by the heating rings 35 and 37.

The heat insulating plate 51 is the upper plate 5 on the upper side.
3 is mounted by screws 55, and an upper support member 57 is mounted on the upper plate 53. The cover member 65 is attached to the upper side of the upper support member 57 by screws 65A. A spring holder 59 that is movable in the axial direction is arranged in the center hole of the upper support member 57.
The spring holder 59 has a projection 59A on the outside in the axial direction and a hole 59B on the opposite side in the axial direction. Protrusion 59
A is engaged with the inner end of the shaft portion 33A of the center pin 33, and the center pin spring 61 is arranged in the hole 59B.

A stopper 63 is arranged above the center pin spring 61, and the stopper 63 has an upper screw portion 63A and a lower spring engaging portion 63B. The screw portion 63A of the stopper 63 is fixed by a screw 67 attached to the cover member 65. The spring engaging portion 63B of the stopper 63 is engaged with the upper end of the center pin spring 61. By rotating the screw portion 63A of the stopper 63 with respect to the screw 67, the stopper 63 moves in the axial direction, whereby the biasing force of the center pin spring 61 can be adjusted. Thus, the center pin spring 61
The biasing force of the center pin 33 passes through the spring holder 59.
Be transmitted to.

When the center pin 33 moves inward in the axial direction, the spring holder 59 engaged with the inner end of the shaft portion 33A of the center pin 33 resists the urging force of the center pin spring 61 and moves in the axial direction. Move inward.

The eject pin 39 extends through the head portion, the support plate 45, the heat insulating plate 51, the upper plate 53, and the upper support member 57, and further extends through the movable member 71. The movable member 71 is a suitable driving device 73.
The movable member 71 can be moved in the axial direction by operating the drive device 73.

A coil spring 75 is attached to the eject pin 39. The coil spring 75 has an upper end engaged with the movable member 71 and a lower end engaged with a ring 77 attached to the eject pin 39. Therefore, the movable member 71
Is moved downward in the axial direction, the coil spring 75 is compressed, whereby the eject pin 39 is urged downward in the axial direction. The urging force of the eject pin 39 is the movable member 7
It can be adjusted by one stroke.

Next, the operation of the hot press machine of this example will be described. The core 11 mounted on the pallet 81 is relatively moved together with the pallet 81 in the hot press device direction. The center pin 33 engages with the center hole 13 of the core 11 to center the center position of the core 11. Further, the core 11 moves toward the hot press machine, and the pressure ring 3
The pressurizing portions 35A, 37A of 5, 37 engage with the groove 13 of the core 11.

Coil 21 arranged in groove 15 of core 11
Is adhered, the drive device 73 is actuated and the eject pin 39 is urged downward. Thereby, the core 11 is urged downward. Next, the core 11 is relatively moved together with the pallet 81 in the direction away from the hot press device. The core 11 is attached to the head 9 by the eject pin 39.
Since the core 11 is biased in the direction away from 1, the core 11 can be easily removed from the head portion 91.

According to this embodiment, the head portion 91 of the hot press machine is removably attached to the support plate 45 by the screw 47. Therefore, when the size or shape of the core 11 is changed, only the head portion 91 is replaced. can do. Further, when the engaging portion 33B of the center pin 33 is worn, the center pin 33 can be replaced.

Although the embodiments of the present invention have been described in detail above, those skilled in the art will understand that the present invention is not limited to the above-mentioned embodiments and various other configurations can be adopted without departing from the gist of the present invention. Easy to understand.

[0047]

As described above, according to the present invention, there is an advantage that the hot pressing step of the rotary transformer assembling work can be automatically performed without manual labor.

According to the present invention, there is an advantage that the center of the core 11 can be accurately and automatically positioned in the hot pressing step of the rotary transformer assembling work.

According to the present invention, there is an advantage that the plurality of grooves 15 of the core 11 can be uniformly pressed in the hot pressing process of the rotary transformer assembling work.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a head portion of a hot press device of the present invention.

FIG. 2 is a diagram showing details of a head portion of the hot press device of the present invention.

FIG. 3 is a diagram showing an example of the overall configuration of a hot press device of the present invention.

FIG. 4 is a diagram showing an example of a rotary transformer.

FIG. 5 is a diagram showing a process of assembling a conventional rotary transformer.

FIG. 6 is a diagram showing a process of assembling a conventional rotary transformer.

[Explanation of symbols]

 11 Core 13 Holes 15, 17 Groove 19 Adhesive 21 Coil 23 Annular part 25 Lead part 27 Pressing head 27A Projection part 31 Main body 33 Center pin 33A Shaft part 33B Engaging part 33C Taper part 35 Pressing ring 35A Pressing part 35B Protrusion 37 Pressurization ring 37A Pressurization part 37B Protrusion 39 Eject pin 41 Elastic member 43 Pin 45 Support plate 47 Screw 49 Heating device 51 Heat insulation plate 53 Upper plate 55 Screw 57 Upper support member 59 Spring holder 59A Protrusion 59B hole 61 Center spring 63 Stopper 63A Screw part 63B Engagement part 65 Cover member 67 Screw 71 Movable member 73 Drive device 75 Coil spring 77A, 77B Ring 81 Pallet 91 Head part

Claims (5)

[Claims] 1. A hot pressing machine used for bonding a coil to a groove of a core, wherein a center pin for engaging a central hole of the core and a pressing member for pressing the coil arranged in the groove of the core. A pressure ring; and an eject pin that pressurizes the core so that the core is separated from the pressure ring. The pressure ring has a plurality of ring portions corresponding to the grooves of the core. A hot-pressing device, each of which is configured to be independently movable in the axial direction corresponding to each of the grooves of the core. 2. The hot pressing apparatus according to claim 1, wherein the pressure ring is elastically biased by silicon rubber. 3. The hot pressing apparatus according to claim 1, wherein the pressing ring is made of a heat conductor. 4. The hot press apparatus according to claim 1, 2 or 3, wherein the center pin has a tapered surface at its tip and is urged by a spring along the axial direction. apparatus. 5. The hot press machine according to claim 1, 2, 3 or 4, wherein the center pin and the pressure ring are mounted on a head portion, and the head portion is mounted in a replaceable manner. Hot press equipment.