JP3469692B2 - Sliding material bonding method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonding method for bonding a sliding member used for a sliding portion of an ultrasonic actuator to an ultrasonic vibrator. 2. Description of the Related Art FIG. 10 shows an ultrasonic transducer of an ultrasonic actuator capable of generating a translational motion described in Japanese Patent Application No. 4-321096. In the ultrasonic transducer 110, three holding elastic bodies 112 are fixed to the upper surface of a basic elastic body 111 by screws, and a stacked piezoelectric element 113 is fixed between the respective holding elastic bodies 112 in a sandwiched state. Have been. Further, sliding members 115 are fixed to both ends of the bottom surface of the basic elastic body 111 by bonding. [0003] An ultrasonic transducer 110 having this structure is shown in FIG.
It is possible to excite the primary co-longitudinal vibration as shown in (a) and the secondary resonant bending vibration as shown in (b) at almost the same frequency. Therefore, a DC voltage of 30 V is applied to the A phase and the B phase to apply a compression preload to the multilayer piezoelectric element 113, and an alternating voltage having a frequency of 53.5 kHz and an amplitude of 10 Vp-p is applied to the A and B phases. . Here, when the phases of the A phase and the B phase are made the same, the primary resonance longitudinal vibration as shown in FIG. 11A is excited. Next, when the phases of the A phase and the B phase are reversed, a secondary resonance bending vibration as shown in FIG. 11B is excited. Next, when the phases of the A phase and the B phase are shifted by 90 degrees, ultrasonic elliptical vibration can be excited near the sliding member 115. FIG. 12 is a front view of an ultrasonic linear motor using the ultrasonic transducer 110. In this ultrasonic linear motor, the ultrasonic vibrator 110 is self-propelled on the rail 121 to the left and right. A linear guide fixing portion 122 is provided on the back surface of the rail 121 to guide the ultrasonic vibrator. A linear guide moving section 123 is provided at the lower end of the support mechanism of the child 110. [0005] In the ultrasonic linear motor having the above-described structure, since the piezoelectric longitudinal effect is utilized by using the laminated piezoelectric element, the electric-mechanical conversion efficiency is improved, and low-voltage driving is possible. In addition, a large output can be obtained while being compact with an extremely simple configuration, and since the laminated piezoelectric element is used while being preloaded, the durability is improved. The sliding member 115 of the ultrasonic vibrator 110
Have previously proposed in Japanese Patent Application No. 5-222849. FIG. 13 is a diagram illustrating this proposal. At least one of the sliding members (sliding member 11 in FIG.
Abrasiveness is imparted by incorporating abrasive grains into the material of 5). In this way, even if the transfer film 203 adheres to the sliding surface, the transfer film 203 is scraped off with sliding, and the sliding member 1 is removed.
15 itself is also slightly shaved so that a new surface can always slide. Here, there is a concern that the amount of abrasion powder increases, but by setting the hardness of the abrasive grains to be equal to or slightly higher than the hardness of the counterpart material 200, the shaving amount of the sliding member 115 itself is microscopic. It can be considered that there is no macroscopic dusting in the area. Therefore, such a sliding member can operate stably without uneven driving force or biting. [0007] However, the sliding material used for the above-mentioned sliding member 115 has a problem. FIG. 9 is a conceptual diagram for explaining the problem of the conventional sliding material. In the figure, 1 is a sliding material (corresponding to the sliding member 115), 11 is its sliding surface, 12 is abrasive grains constituting the sliding material 11, and 3 is a vibration to which the sliding material 1 is fixed by bonding. Reference numeral 4 (corresponding to the basic elastic body 111 in FIG. 10) denotes an adhesive such as an epoxy resin. The sliding material 1 is a porous material in which abrasive grains such as alumina are connected by a base material such as phenol resin. In FIG. The proportion is extremely small and the proportion of vacancies is increased. As is apparent from FIG. 1, when the porous sliding material 1 is bonded to the ultrasonic vibrator 3, an adhesive 4 such as an epoxy resin is absorbed into the sliding material 1 by a capillary phenomenon. . For this reason, when the amount of the adhesive is small, all the adhesive is absorbed by the sliding material 1 before being cured, so that there is a problem that the adhesive cannot be bonded. When a sufficient amount of adhesive is used to prevent this, the adhesive 4 reaches the sliding surface 11 and fills the abrasive grains as shown in FIG. As is clear from the above, the conventional sliding material includes abrasive grains and slightly cuts the sliding surface, so that fresh surfaces always slide with each other, and foreign matter adheres to the sliding surface. This has the effect of stabilizing the operation as an ultrasonic actuator without doing so, but since the sliding material is porous, the adhesive cannot be satisfactorily adhered when bonding it to the vibrator. On the other hand, when a sufficient amount of adhesive is used for bonding, the sucked adhesive reaches the sliding surface, and the abrasive grains are buried. The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a method for stably bonding a porous sliding material containing abrasive grains without sucking an adhesive. Aim. [0011] Means for Solving the Problems The present invention provides a method of bonding a sliding material porous to the ultrasonic transducer, the slide
By heating and melting the area near the adhesive surface of the material,
After crushing the holes and forming a layer that blocks the penetration of the adhesive ,
The sliding surface of the sliding material is bonded to the ultrasonic vibrator. According to the above method, when the sliding material is bonded to the ultrasonic vibrator with the adhesive, the adhesive is stably bonded without being absorbed by the porous sliding material. be able to. (Embodiment 1) FIGS. 1 and 2 show Embodiment 1 of the present invention.
The same elements as those in FIG. 9 are denoted by the same reference numerals and correspond to each other. Also in this embodiment, as in FIG. 9, the grain size of the abrasive grains is exaggerated, the proportion of the base material is extremely small, and the proportion of the pores is large. In this embodiment, as shown in FIG. 1, first, a small amount of an adhesive 41 is applied to the adhesive surface 13 of the sliding material 1 and is cured. Thereafter, as shown in FIG.
The sliding material 1 is adhered to the ultrasonic vibrator 3 by the adhesive 42. As shown in FIG. 1, an adhesive surface 1 of a sliding material 1 is provided.
When a small amount of the adhesive 41 is applied to 3, the adhesive 41 is absorbed into the inside of the sliding material 1 by the capillary phenomenon and hardens. However, since the amount is small, it does not reach the sliding surface 11. After that, when the sliding material 1 is bonded to the ultrasonic vibrator 3 by the adhesive 42, the cured adhesive 41 acts as a layer for preventing the penetration of the adhesive 42, so that the adhesive 42 permeates the sliding material 1. Never do. Therefore, the permeation of the adhesive can be reliably prevented only by dividing the application and curing steps of the adhesive into two stages. (Embodiment 2) FIGS. 3 to 5 show Embodiment 2 of the present invention. In this embodiment as well, the grain size of the abrasive grains is exaggerated, the proportion of the base material is extremely small, and the proportion of the pores is increased. In this embodiment, first, as shown in FIG. 3, holes near the adhesive surface 13 of the sliding material 1 are crushed. More specifically, the base material is melted by pressing the adhesive surface 13 of the sliding material 1 against the heated metal flat surface or by applying ultrasonic vibration to crush the gap between the abrasive grains. FIG. 4 shows a state after the holes are crushed. After crushing the holes, the bonding surface 13 is bonded to the ultrasonic transducer 3 with an adhesive 42 such as an epoxy resin as shown in FIG. In this embodiment, since the pores near the adhesive surface 13 of the sliding material 1 are crushed, the layer whose pores have been crushed acts as a layer for preventing the adhesive 42 from penetrating. 42
Does not penetrate into the sliding material 1. Therefore, a layer for preventing vibration of the adhesive can be provided without increasing the number of steps of curing the adhesive. (Embodiment 3) FIGS. 6 to 8 show Embodiment 3. In these figures as well, the grain size of the abrasive grains is exaggerated and the ratio of the base material is extremely small.
It is drawn with a high percentage of vacancies. In this embodiment, first, as shown in FIG. 6, a film 43 such as a resin is attached to the bonding surface 13 of the sliding material 1. Specifically, a film in the form of a pressure-sensitive adhesive tape may be adhered, or a film without a pressure-sensitive adhesive may be heated or ultrasonic waves may be applied to fuse the film to the bonding surface. FIG. 7 shows a state after the film 43 such as a resin is attached. After the film 43 such as a resin is attached, the sliding material 1 is coated with an adhesive 4 such as an epoxy resin.
The adhesive is bonded to the ultrasonic vibrator 3 by using a film 43 made of resin or the like. In such an embodiment, since the film 43 such as a resin is adhered to the bonding surface 13 of the sliding material 1, the film 43 such as the resin acts as a layer for preventing the penetration of the adhesive 42. This prevents the adhesive 42 from penetrating into the sliding material 1. In this embodiment, since the layer that blocks the penetration of the adhesive 42 can be formed without fusing the sliding material 1 itself, there is an effect that the quality of the material is small and the properties as the sliding material are not easily deteriorated. . According to the present invention, when a sliding material containing abrasive grains is bonded to an ultrasonic vibrator of an ultrasonic actuator, penetration of an adhesive into a bonding surface of the sliding material is prevented. After the layer is provided, it is bonded, so that the adhesive is absorbed by the sliding material and cannot be bonded, and the adhesive does not reach the sliding surface and bury the abrasive grains, making it a good ultrasonic actuator. There is an effect that a simple operation can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a step of applying an adhesive according to a first embodiment. FIG. 2 is a cross-sectional view of a step of bonding to an ultrasonic transducer according to the first embodiment. FIG. 3 is a cross-sectional view of a sliding material according to a second embodiment. FIG. 4 is a cross-sectional view of a step of crushing a hole according to a second embodiment. FIG. 5 is a cross-sectional view of a step of bonding to an ultrasonic transducer according to a second embodiment. FIG. 6 is a cross-sectional view showing a state before a resin film is attached in a third embodiment. FIG. 7 is a sectional view showing adhesion of a resin film in a third embodiment. FIG. 8 is a cross-sectional view of a step of bonding to an ultrasonic transducer according to a third embodiment. FIG. 9 is a cross-sectional view illustrating a problem of adhesion of a conventional sliding material. FIG. 10 is a front view of the ultrasonic transducer. FIGS. 11A and 11B are perspective views showing the operation of the ultrasonic transducer. FIG. 12 is a front view of an ultrasonic linear motor using an ultrasonic transducer. FIG. 13 is a cross-sectional view of the sliding material when sliding. [Description of Signs] 1 Sliding material 3 Ultrasonic vibrator 11 Sliding surface 12 Abrasive grain 13 Adhesive surface 41 Adhesive 42 Adhesive 43 Film such as resin

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Toshiharu Tsuhata 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (56) References JP-A-7-59368 (JP, A) JP-A-62-281772 (JP, A) JP-A-59-190840 (JP, A) JP-A-1-229088 (JP, A) JP-A-6-105571 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) H02N 2/00 H01L 41/09 C09J 5/00

Claims (1)

(57) [Claim 1] In a method of adhering a porous sliding material to an ultrasonic vibrator, the vicinity of the adhesive surface of the sliding material is heated and melted.
After squeezing the pores near the bonding surface by melting to form a layer that blocks the penetration of the adhesive , the bonding surface of the sliding material is bonded to the ultrasonic vibrator. Material bonding method.