JP5428502B2 - Cleaning method - Google Patents

Description

  The present invention relates to a cleaning apparatus and a cleaning method for cleaning small parts (workpieces).

  In general, in a process of putting a workpiece into a net and applying ultrasonic waves to wash it, if the size of the workpiece is small (for example, mm order or less), the mesh (mesh size) must be made small. It escapes from the gap. However, if the mesh size is small, the ultrasonic wave is attenuated, so that the cleaning effect is lowered. For this reason, there is a problem that the cleaning effect cannot be obtained particularly when such a net is used for deburring that requires a strong cleaning effect.

  Here, the grounds that the ultrasonic wave is attenuated when the ultrasonic wave is applied to the net having a small mesh size are as follows.

  That is, as shown in FIG. 6, the inventors experimented the attenuation effect of the ultrasonic wave (sound pressure) by changing the measurement conditions and irradiating the ultrasonic wave of 28 kHz from the oscillator of the ultrasonic wave application device. . According to this experiment, on the basis of the ultrasonic sound pressure (mV) being 18 to 20 in a normal state where there is no shielding object, the ultrasonic sound pressure inside the sheet metal basket (sheet thickness: 1 mm). Ultrasonic sound pressure (mV) is 18 to 20 and inside the wire mesh through one 32 mesh wire mesh Ultrasonic sound pressure (mV) is inside the wire mesh through 16 to 18 and 32 mesh wire mesh As a result, (mV) was around 14. From this point, the ultrasonic wave (sound pressure) is not attenuated even through the sheet metal, but the ultrasonic wave (sound pressure) is attenuated through the fine wire mesh (32 mesh: Bitch 0.8 mm), and the attenuation increases as the number of sheets increases. It was found that the degree was increased.

  On the other hand, in order to avoid the above problem, a method of cleaning with a metal plate that transmits ultrasonic waves by using a jig (cage) is also conceivable. However, since the work is small, the following problem occurs separately.

Japanese Patent Laid-Open No. 7-60204

  That is, when the work is put in a jig and immersed in a cleaning liquid (water or the like), there arises a problem that the work floats on the surface of the cleaning liquid due to the surface tension of water. Further, after the work is cleaned, even if the water and the work in the jig are to be evacuated to a net basket or the like, when the work is wet, the work adheres to the surface of the jig and it is very difficult to take out. Furthermore, even if you try to dry the cleaned workpiece, it is difficult to remove the water inside the jig, so there is a problem that it takes time, and the workpiece is fixed to the surface of the jig again after the workpiece is dried. is there.

  Therefore, in view of the above circumstances, the present invention provides a cleaning device and a cleaning method that can enhance the cleaning effect of a workpiece, facilitate handling and drying of the workpiece, and prevent the workpiece from sticking to a jig.

The present invention includes a first jig through which an ultrasonic wave is transmitted and an opening for inserting a workpiece, and a net-like second jig that is detachably attached to the opening of the first jig. A cleaning method for cleaning the workpiece housed in the cleaning device using the configured cleaning device, wherein the cleaning is performed with the first jig positioned below the second jig. A first step of immersing the apparatus in a cleaning liquid; and a second step of irradiating the cleaning apparatus with ultrasonic waves after the completion of the first process and cleaning the workpiece with the ultrasonic waves transmitted through the first jig. And after the end of the second step, the cleaning device is reversed, the second jig is positioned below the first jig, and the ultrasonic wave transmitted through the second jig is transmitted to the workpiece. a third step of irradiating, after completion of the third step, positioned below said first jig said second jig The cleaning apparatus in a state in which a and a fourth step of pulling from the cleaning solution.

According to the present invention, in the first step, the cleaning device is immersed in the cleaning liquid with the first jig positioned below the second jig. In the second step, after completion of the first step, the cleaning device is irradiated with ultrasonic waves, and the workpiece is cleaned with the ultrasonic waves transmitted through the first jig. In the third step, after completion of the second step, the cleaning device is inverted, the second jig is positioned below the first jig , and the workpiece is irradiated with ultrasonic waves transmitted through the second jig. . In the fourth step, after the completion of the third step, the cleaning apparatus is pulled up from the cleaning liquid in a state where the second jig is positioned below the first jig. As a result, the workpiece is cleaned by irradiating the workpiece with the ultrasonic wave transmitted through the first jig. As a result, since the ultrasonic wave reaches the workpiece without being attenuated, the cleaning effect of the workpiece can be enhanced. In addition, the cleaning device is pulled up from the cleaning liquid in a state where the second jig is positioned below the first jig. As a result, it is possible to prevent the workpiece from moving to the net-like second jig side and sticking to the first jig.

In particular , in the third step, the workpiece is irradiated with ultrasonic waves that have passed through the second jig. Thereby, it can prevent that a workpiece | work adheres to a 1st jig | tool. In addition, since the 2nd jig | tool is comprised by the net shape, when a mesh size becomes small, an ultrasonic wave will attenuate | damp. However, the irradiation of ultrasonic waves in the third step is not intended to clean the workpiece, but is intended to prevent the workpiece from sticking to the first jig, so that there is no adverse effect due to attenuation of the ultrasonic waves.

  Furthermore, in this case, it is preferable to have a fifth step of performing a drying process together with the second jig on the work housed in the second jig after the completion of the fourth step.

  According to this, in the fifth step, after the completion of the fourth step, the drying process is executed together with the second jig on the work housed in the second jig. This eliminates the need to transfer the workpiece to another container (jig) during the workpiece drying process, thereby increasing the efficiency of the workpiece drying process.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the washing | cleaning effect of a workpiece | work, handling and drying of a workpiece | work can be made easy and it can prevent that a workpiece | work adheres with respect to a jig | tool.

It is explanatory drawing which showed the state which the net-like jig | tool and sheet metal jig | tool which comprise the washing | cleaning apparatus of this invention isolate | separated, and the assembled state. It is explanatory drawing which showed the state which immersed the cleaning apparatus of this invention in the washing | cleaning liquid, and applied the ultrasonic wave. It is explanatory drawing which showed the state which inverted the washing | cleaning apparatus of this invention in the washing | cleaning liquid, and applied the ultrasonic wave. It is explanatory drawing which showed the state which pulled up the washing | cleaning apparatus of this invention from the washing | cleaning liquid. It is explanatory drawing which showed the state decomposed | disassembled after pulling up the washing | cleaning apparatus of this invention from the washing | cleaning liquid. It is the measurement result which showed the attenuation effect of the ultrasonic wave for every measurement condition.

  A cleaning apparatus and a cleaning method according to a first embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the cleaning apparatus 10 is mainly composed of a sheet metal jig 12 made of sheet metal that transmits ultrasonic waves L (see FIG. 2), and a cage-shaped net (metal mesh) having a predetermined mesh size. And a reticulated jig 14 formed. The sheet metal jig 12 has a box shape with an opening 13 formed at one end, and can accommodate a work 16 that is a small component such as an electronic component. Moreover, it is preferable that R is attached to the corners in the sheet metal jig 12 so that the workpieces are not concentrated and ultrasonic waves are effectively transmitted. When the ultrasonic wave L is applied to the sheet metal jig 12, the ultrasonic wave L passes through the sheet metal jig 12 and is irradiated onto the workpiece 16 accommodated therein. A reticulated jig 14 is detachably attached to the opening 13 of the sheet metal jig 12, and the workpiece 16 accommodated in the sheet metal jig 12 is moved between the inside of the sheet metal jig 12 and the reticulated jig 14. It can be confined in a space surrounded by the interior. The mesh size of the mesh jig 14 is set to a size that prevents the workpiece from passing through.

  Next, a method for cleaning the workpiece 16 using the cleaning apparatus 10 will be described.

  As shown in FIG. 1, the workpiece 16 is accommodated in the mesh jig 14 or the sheet metal jig 12, and the mesh jig 14 is mounted in the opening 13 of the sheet metal jig 12. Thereby, the workpiece 16 can be accommodated inside the mesh jig 14 and the sheet metal jig 12.

  Next, as shown in FIG. 2, with the sheet metal jig 12 positioned below the gravitational action direction (in the direction of arrow G in FIG. 2), the cleaning device 10 uses the cleaning liquid 18 (water, degassed water, Soaked completely in the solvent). As a result, the sheet metal jig 12 and the mesh jig 14 are immersed in the cleaning liquid 18. At this time, the workpiece 16 is placed on the bottom of the sheet metal jig 12 by its own weight. In addition, when the work 16 has a small mass and the work 16 tends to float on the water surface of the cleaning liquid 18 due to the surface tension of the cleaning liquid 18, the work 16 can be captured by the mesh jig 14 located on the upper side. The workpiece 16 does not float on the water surface of the cleaning liquid 18.

  Thereafter, the workpiece 16 is irradiated with the ultrasonic wave L over a predetermined time by using an ultrasonic wave application device (not shown). Here, since the ultrasonic wave L is irradiated to the sheet metal jig 12 and is transmitted through the sheet metal jig 12 and irradiated to the internal workpiece 16, the ultrasonic wave L is not transmitted through the mesh jig 14. As a result, the ultrasonic wave L is directly applied to the workpiece 16 without being attenuated by the mesh of the mesh jig 14. As a result, the ultrasonic cleaning (deburring process) of the workpiece 16 having a high cleaning effect and high deburring effect can be performed. The cleaning using the ultrasonic wave L is affected by the standing wave, so that the cleaning effect varies greatly depending on the position (height). However, the submerged position of the cleaning liquid 18 having a high cleaning effect is obtained in advance. It is preferable to keep it.

  Further, in order to reduce the influence of the mesh of the mesh jig 14 when cleaning the workpiece, a part of the mesh jig 14 is exposed from the water surface of the cleaning liquid 18 when the workpiece 16 is cleaned, or the mesh jig 14 is exposed. May be removed from the sheet metal jig 12. However, when a part of the mesh jig 14 is exposed from the water surface of the cleaning liquid 18, a water film is often stretched on the net portion of the mesh jig 14 once immersed. When submerged in the cleaning liquid 18 again, air enters the reticulated jig 14 and may cause problems such as workpiece fixing in a later process. become. Further, when removing the mesh member 14 from the sheet metal jig 12, if the workpiece 16 is irradiated with the ultrasonic wave L, the workpiece 16 is likely to jump out of the sheet metal jig 12. It is necessary to adjust the output of the sound wave L.

  Next, as shown in FIG. 3, after cleaning the workpiece 16, the cleaning device 10 is inverted while the cleaning device 10 remains immersed in the cleaning liquid 18. Accordingly, the cleaning apparatus 10 is turned upside down, the sheet metal jig 12 is positioned above the mesh jig 14, and the positions of the sheet metal jig 12 and the mesh jig 14 are switched. At this time, although the net-like jig 14 is positioned on the lower side, it is preferable to irradiate the workpiece 16 with the ultrasonic wave L for a short time by the ultrasonic wave application device. When the ultrasonic wave L is irradiated by the ultrasonic wave application device, the ultrasonic wave L passes through the mesh device 18 while being attenuated, and enters the cleaning device 10. Then, the workpiece 16 fixed to the inner surface of the sheet metal jig 12 located on the upper side is irradiated with the ultrasonic wave L, whereby the adhesion of the workpiece 16 to the inner surface of the sheet metal jig 12 is eliminated. As a result, the workpiece 16 can be easily detached from the inner surface of the sheet metal jig 12. As a result of this operation, the workpiece 16 drops to the mesh jig 14 side.

  In the reversing operation of the cleaning device 10, the cleaning position of the workpiece 16 is relatively shallow, and when the cleaning device 10 is reversed, a part of the sheet metal jig 12 or the net-like jig 14 of the cleaning device 10 is the water surface of the cleaning liquid 18. When the air is exposed to the inside of the cleaning apparatus 10, it is preferable that the cleaning apparatus 10 is once submerged in a deep part of the cleaning liquid and the cleaning apparatus 10 is inverted at the deep part.

  Next, as shown in FIG. 4, after the cleaning device 10 is reversed, the cleaning device 10 is pulled up from the cleaning liquid 18 in a state where the mesh jig 14 is positioned below the sheet metal jig 12. . At this time, since the mesh jig 14 is located below the sheet metal jig 12, the cleaning liquid 18 that has entered the cleaning apparatus 10 is removed from the mesh portion of the mesh jig 14. Discharged. Thereby, the cleaning liquid 18 accumulated in the cleaning apparatus 10 can be removed. When the cleaning apparatus 10 is pulled up from the cleaning liquid 18, the workpiece 16 is captured by the mesh jig 14.

  Then, as shown in FIG. 5, after the cleaning apparatus 10 is completely lifted from the cleaning liquid 18, the mesh jig 14 and the sheet metal jig 12 are separated. Thereafter, the drying process is performed together with the mesh jig 14 in a state where the workpiece 16 is accommodated in the mesh jig 14. Thereby, both the reticulated jig 14 and the workpiece 16 are simultaneously dried.

  As described above, according to the first embodiment of the present invention, when the cleaning apparatus 10 is immersed in the cleaning liquid 18, the workpiece 16 can be captured by the mesh jig 14 located on the upper side. Can be prevented from floating on the water surface of the cleaning liquid 18 due to the surface tension of the cleaning liquid 18.

  Further, when the workpiece 16 is cleaned, the workpiece 16 is irradiated with the ultrasonic wave L transmitted through the sheet metal jig 12 instead of the mesh jig 14, as shown in FIG. The sound wave L is not attenuated. Thereby, the cleaning effect of the workpiece 16 can be enhanced.

  As shown in FIG. 3, when the cleaning device 10 is inverted and the mesh jig 14 is positioned on the lower side, the mesh of the mesh jig 14 is fixed to the workpiece 16 fixed to the sheet metal jig 12. By irradiating the ultrasonic wave L through the portion, the adhesion between the workpiece 16 and the inner surface of the sheet metal jig 12 is eliminated, and the workpiece 16 falls onto the mesh jig 14. This can prevent the workpiece 16 from sticking to the inner surface of the sheet metal jig 12.

  Further, as shown in FIGS. 4 and 5, after the cleaning device 10 is lifted from the cleaning liquid 18, the workpiece 16 is dried together with the mesh jig 14 to thereby dry the workpiece 16 and the mesh jig 14. Can be done simultaneously. In particular, when the cleaning device 10 is pulled up from the cleaning solution 18 with the mesh jig 14 positioned below the sheet metal jig 12, the cleaning solution 18 inside the cleaning device 10 becomes a mesh (mesh) of the mesh jig 14. It is discharged from the eyes. For this reason, the amount of the cleaning liquid 18 adhering to the workpiece 16 and the net-like jig 14 can be reduced. As a result, it is not necessary to transfer the work 16 to another container (jig) during the drying process of the work 16, and the efficiency of the drying process of the work 16 can be increased.

10 Cleaning device 12 Sheet metal jig (first jig)
14 Net jig (second jig)
16 Work 18 Cleaning liquid L Ultrasonic

Claims (2)

Cleaning composed of a first jig that has an opening for inserting a workpiece and transmits ultrasonic waves, and a net-like second jig that is removably attached to the opening of the first jig. A cleaning method for cleaning the workpiece housed in the cleaning device using an apparatus,
A first step of immersing the cleaning device in a cleaning liquid in a state where the first jig is positioned below the second jig;
After the completion of the first step, a second step of irradiating the cleaning device with ultrasonic waves and cleaning the workpiece with the ultrasonic waves transmitted through the first jig;
After completion of the second step, the cleaning device is inverted, the second jig is positioned below the first jig, and the ultrasonic wave transmitted through the second jig is irradiated onto the workpiece. A third step to perform,
After the completion of the third step, a fourth step of pulling up the cleaning device from the cleaning liquid in a state where the second jig is positioned below the first jig;
A cleaning method comprising: The cleaning method according to claim 1, further comprising a fifth step of performing a drying process together with the second jig on the work housed in the second jig after the completion of the fourth step .

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