JPS63178189A - Method of bonding bearing to member to which bearing is fitted - Google Patents

Abstract

PURPOSE:To prevent the outflow of grease from a bearing and the occurrence of nonuniformity in an applied adhesive, by utilizing the heat applied when a member to which a bearing is attached is preheated before joining for causing an adhesive to cure so that the bearing is bonded to the member. CONSTITUTION:In a heating and assembling unit 6, a base 2 is preheated to the same temperature as a maximum temperature of use by means of a lower core coil 63 and an upper core 64. When the heated base is set to an assembling position Z and a bearing 1 to which an adhesive has been applied is also set to the assembling position Z by means of a conveying and assembling unit 3, the hand 31 of the conveying and assembling unit 3 moves the bearing 1 in a vertical direction toward the fitting hold of the base 2 for insertion. Since the base 2 has been preheated to the same temperature as am guaranteed maximum temperature, the heat causes an anaerobic adhesive applied to the bearing 1 to cure so that the ring of the bearing 1 can be bonded to the base 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of bonding a bearing to a bearing mounting member using an anaerobic adhesive. The present invention relates to a method of adhering a bearing and a bearing mounting member suitable for use as a magnetic disk device by rotatably supporting the bearing.

[Prior art] As a conventional technology for bonding a bearing, there is a ``TECHNICAL DAT'' published by Loctite (August 1982), TECHNICAL DAT.
There is a technology shown in A5HEET, TDS59).

This conventional technology involves (1) cleaning the bearing with trichlorethylene (trichlorethylene) to remove unnecessary oil and dirt;
(2) Press the bearing against a rotating roll coater that is held horizontally, rotate it around the horizontal axis, and apply adhesive to the surface of the outer shaft of the bearing (3) Bearing Change the position of the bearing in the vertical direction, insert the bearing into the mounting part while rotating it so that the applied adhesive spreads, and install it. (4) Glue the bearing and the mounting part while heating the mounting part with the bearing. to do, to do.

[Problems to be Solved by the Invention] In the conventional technology, there is a problem in that when a bearing is steam-cleaned, the grease sealed in the bearing flows out.

In addition, since the bearing is held horizontally when applying the adhesive, and its position is changed vertically when it is attached to the mounting member, the movement of the holding means to hold it increases accordingly. The structure of the holding means is complicated, and since the adhesive drips due to the vertical position change, there is a risk that the adhesive may not be applied uniformly in the circumferential direction on the outer ring of the bearing.

Furthermore, when the adhesive is thermally cured, the bearing is heated at a temperature higher than the guaranteed maximum temperature for use of the device (approximately 150° C.), which adversely affects its support rigidity, resulting in a reduction in support rigidity.

In view of the problems of the prior art described above, an object of the present invention is to provide a bearing that eliminates the risk of grease leaking out of the bearing and the risk of nonuniform application of adhesive, and further prevents a decrease in support rigidity of the bearing. and a method for bonding a bearing mounting member.

[Means for Solving the Problems] In the method of the present invention, the bearing is held in a vertical direction and is sequentially fed into a cleaning process, a coating process, and a heating assembly process, and in the cleaning process, the outer circumferential surface of the outer ring of the bearing is wiped. In the application process, an anaerobic adhesive is applied to the outer peripheral surface of the bearing outer ring, and in the heating assembly process, the bearing mounting member is heated in advance to the same temperature as the guaranteed temperature in use, and the bearing is installed. The bearing coated with the adhesive is vertically fitted into the assembly hole of the member, and the adhesive is cured to bond the bearing and the bearing mounting member.

[Operation] In the cleaning process, only the outer peripheral surface of the outer ring of the bearing is wiped clean, so there is no risk of grease inside the bearing flowing out.

In addition, during the application process, the bearing is held vertically and the anaerobic adhesive is applied, and during the heating assembly process, the bearing is vertically fitted into the assembly hole of the bearing mounting member, so the adhesive is not applied around the outer ring of the bearing. There is no risk that the state of application of the agent will be uneven. Furthermore, when the bearing is fitted into the bearing mounting member, the adhesive is cured using the heat of the bearing mounting member that has been heated in advance, so that it is possible to prevent the support rigidity of the bearing from decreasing.

[Example 1] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 8. Fig. 1 is an overall perspective view showing an example of a bonding device for implementing the method of the present invention, Fig. 2 is a perspective view showing a cleaning unit, and Figs. 3 (a) to (c) are cleaning of bearings by the cleaning unit. An explanatory diagram showing the process, Figure 4 is a perspective view showing the adhesive application state, Figures 5 (a) to (c) are explanatory diagrams showing the bearing application process by the application unit, and Figure 6 is the heating built-in unit. Fig. 7 is an enlarged perspective view showing the positioning of the bearing and the bearing mounting member; Fig. 8 is a perspective view showing the positioning of the bearing and the bearing mounting member;
The figure is an enlarged perspective view showing a state in which the bearing is fitted into the bearing mounting member.

An embodiment of the bonding device for a bearing and a bearing mounting member that implements the method of the present invention is one in which a bearing 1 is bonded to a base 2, which is a bearing mounting member, with an adhesive, and an arm supporting a magnetic head is used. is applied to a magnetic disk device assembled to a base 2 via the bearing 1.

The adhesion device can be roughly divided into a conveyance/installation unit 3, a cleaning unit 4, and an application unit 5.
It is configured to include a heating built-in unit 6.

As shown in FIG. 1, FIG. 4, FIG. 7, and FIG. 8, the conveyance/assembly unit 3 includes a hand 31 that can hold and release the bearing 1, and a hand 31 that moves the hand 31 to a predetermined position. The hand 31 holds the center axis of the bearing 1 in the vertical direction by attaching a bearing chuck 35 that fits the inner ring of the bearing 1 set on the magazine 7 in advance, and the hand 31 has a moving body 32. A cleaning unit 4 (described later) with a moving body 32
The coating unit 5 and heating built-in unit 6 are fed and positioned at desired positions.

Further, a self-aligning mechanism 33 for attaching a bearing chuck 35 is attached to the hand 31, and a guide member 34 for guiding the fitting of the bearing 1 into the base 2 is attached at a midway position of the bearing chuck 35. .

The self-aligning mechanism 33 holds the bearing 1 coaxially when the bearing chuck 35 is installed and locked, and allows the bearing 1 to move around the vertical axis when the lock is released.

As shown in FIGS. 2 and 3, the cleaning unit 4 includes a wiping tape 41 and two reels 42. which wind up both ends of the tape 41 and run the tape 41.
43, and is provided in the middle of the running route of the tape 41,
In addition, a coating block 44 that sprays and coats a cleaning agent made of Freon solution or the like onto the surface of the tape 41, a bearing receiver 46 that rotates the bearing 1 when the bearing 1 is carried in, and a coating block 44 and reels 42 and 43. It has a slide base 45 that is movable in the mounting and bearing direction. This cleaning unit 4 is
As shown in FIG. 3(a), when the bearing 1 is fed into the bearing receiver 46 by the conveyance/assembly unit 3, the bearing receiver 46 rotates the bearing 1 in the convex direction of the arrow as shown in FIG. 3(b), and Application block 44
applies a cleaning agent to the surface of the tape 41, and at the same time
1 is driven by the reel 42, 43 and the guide roller 47 to run in the opposite direction to the rotating direction of the bearing 1, and the slide base 45 further moves in the direction of the arrow to move the surface of the tape 41 coated with the cleaning agent onto the bearing. By pressing the tape 41 against the outer peripheral surface of the outer shaft 1, the tape 41 wipes and cleans the outer peripheral surface of the outer ring of the bearing. At that time, after the bearing 1 is cleaned while the tape 41 is running,
By stopping the application of the purifying agent by the application block 44, the outer shaft of the bearing 1 is wiped dry.

At this time, the amount of tape 41 used may be saved by using the dry-wiped tape portion to clean the primary bearing.

In the cleaning unit 4, after the cleaning operation of the bearing 1, the bearing receiver 46 releases the drive of the bearing 1 as shown in FIG. 3(C), and the tape 41. The slide base 45 is designed to return to its original position.

In FIG. 3, 47 and 48 are guide rollers.

As shown in FIGS. 4 and 5, the coating unit 5 includes a roller 51, a drive motor 52 for the roller, and a supply tube 5 for supplying anaerobic adhesive to the outer surface of the roller 51.
3, and an adjustment blade 54 that is movably provided toward the outer surface of the roller 51 and that can adjust the amount of adhesive applied to the outer peripheral surface of the roller 51. As shown in FIG. 5(a), in this application unit 5, when the purified bearing 1 is fed by the conveying and assembling unit 3, the roller 51 rotates around a vertical axis by the drive motor 52, and the supply tube 53 The adhesive is supplied to and adheres to the outer peripheral surface of the roller 51, and the amount of adhesive applied to the outer peripheral surface of the roller 51 is controlled by the adjustment blade 5.
4, the hand 31 presses the outer shaft of the bearing 1 against the outer surface of the roller 51 with a constant force as shown in FIG. By rotating the adhesive around the outer ring of the bearing 1, the adhesive is uniformly applied to the circumferential surface of the outer ring of the bearing 1.

The adhesive applied to the bearing 1 is selected to harden at a guaranteed temperature (approximately 65° C.) under the conditions in which the magnetic disk device is used.

Note that after the bearing 1 is coated with an appropriate amount of adhesive so as not to fall onto the surface of the outer ring, it is moved upward by the hand 31 to prevent the adhesive from becoming stringy between the bearing 1 and the roller 51 (Fig. 5). (see (c)).

The heating assembly unit 6 heats the bearing 1 using the heat of the base 2 when the bearing 1 and the base 2 are assembled.
In order to cure the adhesive applied to the base 2, the base 2 is heated in advance to the same temperature as the maximum temperature in use. As shown in FIG. 6, a jig 61 for mounting the base 2, a first cylinder 62 for moving the jig 61, and a heating lower core coil 63 disposed toward each other in the movement path position of the jig 61. It has an upper core 64 and a second cylinder 65 that moves the upper core 64 toward the lower core fill 63. When the base 2 is mounted on the jig 61, the jig 61 is attached to the first cylinder 62. The upper core 64 is moved and positioned over the lower core coil 63 by the drive, while the upper core 64 is lowered by the drive of the second cylinder 65, and one end 64a of the upper core 64 passes through the base 2 and the jig 61 and reaches the one end 6 of the lower core coil 63.
38, the other end 64b of the upper core 64 contacts the other end 63b of the lower core coil 63, and is energized, so that the base 2 on the jig 61 is brought to the same temperature as the operating state (approximately 65 ℃).

Note that the jig 61 of the heating built-in unit 6 is attached to the base 2.
When heating is completed, the upper core 64 returns to its original position and is further moved to the assembly position Z by driving the first cylinder 62 in order to send the base 2 to the assembly position 2 with the bearing 1.

On the other hand, when the conveyance/assembly unit 3 sends and sets the bearing 1 above the heated base 2 at the assembly position Z, the hand 31 moves the bearing 1
is vertically fitted into the assembly hole 21 of the base 2, whereby the outer shaft of the bearing 1 is adhered to the base 2 by the adhesive applied thereto.

At this time, when the bearing 1 is fitted into the assembly hole 21 of the base 2, the conveyance/assembly unit 3 unlocks the self-aligning mechanism 33 of the hand 31, and
self-aligning even if it hits the base 2 to some extent and is subjected to external force, and the guide member 34 is inserted into the hole 22 above the assembly hole 21 of the base 2 and guides the bearing 1, so that the outer ring of the bearing 1 is aligned with the assembly hole. 21 so that it can be fitted securely.

Next, an example of the method of the present invention will be described based on the operation of the bonding apparatus of the embodiment.

First, the hand 31 of the conveyance/assembly unit 3 is connected to the bearing chuck 3 that is compatible with the bearing 1 on the magazine 7.
5 and hold it vertically, and in that position, move the bearing 1 between the cleaning unit 4 and the coating unit 5. It is sent to the heating built-in unit 6 one after another.

In the cleaning unit 4, when the bearing 1 is fed, the bearing 1 is rotated around the vertical axis, while the wiping tape 41 runs in the opposite direction, and the tape 41
The cleaning agent is applied to the surface by the application block 44, and the slide base 45 moves in the direction of the bearing 1 to press the tape 41 against the outer shaft of the bearing 1.
wipes and cleans the outer circumferential surface of the bearing outer ring.

That is, since only the outer circumferential surface of the outer shaft of the bearing 1 is wiped and cleaned, there is no risk of the grease inside the bearing 1 flowing out compared to the conventional steam cleaning of the entire bearing.

In the application unit 5, when the cleaned bearing 1 is fed, the roller 51 rotates around the vertical axis and the anaerobic adhesive is applied to the outer circumference of the roller 51, so that the outer ring of the bearing 1 is transported. The adhesive is applied to the outer circumferential surface of the outer ring of the bearing by rotating while being pressed against the roller 51 as the integrated unit 3 moves.

In the heating assembly unit 6, the base 2 is heated in advance by the lower core coil 63 and the upper core 64 to the same temperature as the maximum temperature during use, so the heated base 2 is set at the assembly position Z.

When the bearing 1 coated with adhesive is also set at the assembly position Z by the conveyance/assembly unit 3, the hand 31 of the conveyance/assembly unit 3 moves the bearing 1
is inserted vertically toward the assembly hole 21 of the base 2. In this case, the hand 31 has a self-aligning mechanism 33, and by releasing the lock, the bearing 1 moves around the vertical axis. Therefore, the bearing 1 can be reliably fitted into the assembly hole 21 of the base 2.

As a result, since the base 2 has been previously heated to the same temperature as the guaranteed maximum temperature, the anaerobic adhesive applied to the bearing 1 hardens due to the heat, which causes the bearing 1 to harden.
The outer ring of can be glued to the base 2.

As a result, the bearing 1 is held vertically, the anaerobic adhesive is applied, and the bearing 1 is fitted into the base 2 in that position, so the orientation of the bearing is changed from horizontal to vertical. Compared to the one that changes to
There is no risk that the adhesive will be applied unevenly around the outer shaft of the bearing 1.

In addition, the adhesive on the bearing 1 is cured using the heat of the base 2, which is heated to the same temperature as the maximum temperature guaranteed in the operating condition, so the adhesive is cured at a higher temperature than the operating temperature as in the conventional case. Compared to the case where the support rigidity of the bearing 1 is changed, it is possible to prevent the support rigidity of the bearing 1 from changing.

Furthermore, since the bearing 1 is always held in one direction, only the vertical direction, not only during any work process but also during transport between the processes, the structure of the transport/installation unit 3 as a holding means can be reduced accordingly. Can be simplified.

Further, the bonding device of the illustrated embodiment includes a cleaning unit 4, a coating unit 5, a heating assembly unit 6, and a conveyance and assembly unit 3, and cleans and bonds the outer ring of the bearing while holding the bearing 1 vertically. Since the structure is such that the application of the agent and the fitting into the base 2 can be performed automatically in sequence, the method of the present invention can be carried out accurately.

[Effects of the Invention] As described above, according to the method of the present invention, the bearing is sequentially fed into a cleaning process, a coating process, and a heating assembly process while being held vertically, and in the cleaning process, the outer peripheral surface of the outer ring of the bearing is cleaned. In the application process, an anaerobic adhesive is applied to the outer circumferential surface of the outer ring of the bearing, and in the heating assembly process, the bearing mounting member is heated in advance to a temperature comparable to the guaranteed maximum temperature in use. Then, fit the bearing coated with the adhesive into the assembly hole of the bearing mounting member, and by using the heat of the bearing mounting member, the adhesive hardens and bonds the bearing and the bearing mounting member, so that the inside of the bearing This eliminates the risk of grease leaking out or uneven application of adhesive on the outer ring of the bearing, simplifies the structure of the bearing holding means, and also prevents a decline in bearing support rigidity. .

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing an example of a bonding device for implementing the method of the present invention, Fig. 2 is a perspective view showing a cleaning unit, and Figs. 3 (a) to (c) are cleaning of bearings by the cleaning unit. An explanatory diagram showing the process, Fig. 4 is a perspective view showing the adhesive application state, Figs. 5 (a) to (C) are explanatory diagrams showing the bearing application process by the application unit, and Fig. 6 is a heating built-in unit. FIG. 7 is an enlarged perspective view showing the positioning of the bearing and the bearing mounting member, and FIG. 8 is an enlarged perspective view showing the state in which the bearing is fitted into the bearing mounting member. 1...Bearing, 2...Base (bearing mounting member), 21...Bearing assembly hole, 3...
Transfer/embedding unit, 31...hand, 4...
Cleaning unit, 5... Application unit, 6... Heating built-in unit.

Claims (1)

[Claims] 1. Holding the bearing vertically, feed it into a cleaning process, a coating process, and a heating assembly process in order. In the cleaning process, the outer circumferential surface of the outer ring of the bearing is wiped clean, and in the coating process, the outer circumferential surface of the outer ring of the bearing is wiped clean. An anaerobic adhesive is applied to the bearing mounting member, and in the heating assembly process, the bearing mounting member is heated in advance to the same temperature as the guaranteed maximum temperature in the usage state, and the adhesive is applied to the assembly hole of the bearing mounting member. A method for bonding a bearing and a bearing mounting member, which comprises fitting the bearing and preheating the bearing mounting member to harden the adhesive to bond the bearing and the bearing mounting member.