JPH0699149A - Ultrasonic cleaning method - Google Patents

Abstract

PURPOSE:To provide an ultrasonic cleaning method which performs cleaning in pares and deburring even when the pores are formed in the surface layer of a work. CONSTITUTION:In an ultrasonic cleaning method effective in cleaning a work W and deburrring, ultrasonic waves are applied to a cleaning liquid A in which the work W having pores (a), (b) in its surface layer is immersed. During cleaning, the work W is taken out at least once from the cleaning liquid A to extract the liquid A from the pares (a), (b).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ultrasonic cleaning method for cleaning a work using ultrasonic waves.

[0002]

2. Description of the Related Art In recent years, ultrasonic cleaning technology has been widely used for cleaning and deburring a work by using ultrasonic waves.

In this ultrasonic cleaning technique, a work is immersed in a cleaning liquid such as water stored in a cleaning tank, and ultrasonic waves are ultrasonically added to the cleaning liquid from an ultrasonic oscillator attached to the bottom of the cleaning tank. Is emitted, and at this time, the effect of cavitation generated in the cleaning liquid is utilized to clean the work and deburr the work.

In such ultrasonic cleaning technology, generally, the cavitation effectively acting for cleaning the work is first 1 / wavelength of the ultrasonic wave from the liquid surface of the cleaning liquid.
It is known that it appears remarkably at the position of the depth of 4 and further remarkably appears at the depth of every ½ wavelength from the position of the depth of ¼ wavelength. Therefore, when the work is cleaned, merely holding the work in a cleaning liquid in a stationary state easily causes a portion where the work is effectively cleaned and a portion where the cleaning is insufficient.

For this reason, when ultrasonically cleaning a work, the work is usually moved up and down in the cleaning liquid so that cavitation generated in the cleaning liquid effectively acts on the entire surface of the work. ing.

In the ultrasonic cleaning technique, when holes such as blind holes and through holes are formed on the surface of the work, the holes are formed by the cavitation action in the holes of the work immersed in the cleaning liquid. The dirt, dust, etc. removed from the inner wall of the hole is easily stored in the hole, and the dirt, dust, etc. thus stored in the hole is easily attached again to the inner wall of the hole. And, this is particularly remarkable when the hole is formed in the horizontal direction or when the hole is a blind hole formed on the upper surface of the work, and
Even if the work is moved up and down in the cleaning liquid as described above, the cleaning liquid does not easily flow in the hole, and the same is true.

Therefore, in the conventional ultrasonic cleaning technique, the inside of the hole formed on the surface of the work is often not cleaned or deburred sufficiently, and it has been desired to eliminate this problem.

[0008]

The present invention solves such inconvenience, and even when a hole is formed on the surface of a workpiece, the inside of the hole can be reliably cleaned and deburred. It is an object to provide an ultrasonic cleaning method.

[0009]

In order to achieve the above object, the present invention cleans a work having a hole on its surface by irradiating ultrasonic waves into the cleansing liquid while immersing the work in the cleaning liquid. In the ultrasonic cleaning method for deburring or deburring, the method further comprises a step of taking out the work from the cleaning liquid at least once during the cleaning of the work, and discharging the cleaning liquid from the hole of the work at the time of taking out the work. And

Further, when cleaning the work, a step of moving the work up and down while the work is immersed in the cleaning liquid is provided.

[0011]

According to the present invention, when ultrasonically cleaning the work in the cleaning liquid, the work is taken out of the cleaning liquid once, and the cleaning liquid is discharged from the hole of the work, thereby Thus, the dirt, dust, etc. accumulated in the hole of the workpiece are discharged, and the dirt, dust, etc. are prevented from reattaching to the inner wall of the hole.

Further, by moving the work up and down in the cleaning liquid, the cavitation generated in the cleaning liquid by ultrasonic radiation surely acts not only on the surface of the work but also in the hole, so that the work is cleaned and deburred. Effectively over its entire surface.

[0013]

EXAMPLE An example of the ultrasonic cleaning method of the present invention will be described with reference to FIGS. 1 and 2 are explanatory views for explaining an ultrasonic cleaning device to which the present invention is applied.

In FIG. 1, this ultrasonic cleaning apparatus comprises a cleaning tank 1 filled with a cleaning liquid A such as water, and an ultrasonic oscillator 2 fixed to the bottom of the cleaning tank 1.

In this case, the cleaning liquid A in the cleaning tank 1 has a pair of rectifiers 3, which are attached to both side walls of the cleaning tank 1.
3 is circulated through a circulation path 4 whose both ends are connected to each other. Further, at the time of the circulation, a filter and a deaerator (not shown) provided in the middle of the circulation path 4 filter and remove the cleaning liquid A. I feel like I am going to do it. The rectifier 3 is for rectifying the cleaning liquid A in the cleaning tank 1 when the cleaning liquid A is circulated.

Further, in this ultrasonic cleaning apparatus, the work W to be cleaned and deburred is stored in the bucket 5 formed by the mesh body, and in this state, the work holding device 6 shown by the phantom line in FIG. Holds the bucket 5,
Along with the bucket 5, the cleaning liquid A in the cleaning tank 1 is immersed from above. In this case, the work holding device 6 moves the work W up and down together with the bucket 5 in the cleaning liquid A.

In this embodiment, the work W is provided with holes a and b extending substantially horizontally, for example, as shown in the figure. The hole a is a through hole and the hole b is a blind hole.

Next, the ultrasonic cleaning of the work W by the ultrasonic cleaning device will be described.

When ultrasonically cleaning the work W, first, as described above, the work W is immersed in the cleaning liquid A together with the bucket 5 by the work holding device 6, and the work W is further cleaned together with the bucket 5. The cleaning liquid A is moved up and down, and in this state, ultrasonic waves are radiated into the cleaning liquid A by the ultrasonic oscillator 2. Then, due to the ultrasonic radiation, cavitation is generated in the cleaning liquid A, and the cavitation action cleans and deburrs the surface of the work W and the holes a and b.

At this time, as described above, the cavitation starts from the liquid surface of the cleaning liquid A and is first 1 / wavelength of the ultrasonic wave.
4 remarkably appears at the depth position of 4, and further remarkably occurs at the depth of every ½ wavelength from the position of the depth of ¼ wavelength. Therefore, by moving the work W up and down as described above, each part of the work W facing the cleaning liquid A passes through the depth at which cavitation appears significantly. Effectively acts on the inner wall. As a result, dirt, dust, and the like are removed over the entire surface of the work W and the inner walls of the holes a and b. However, in this case, in the holes a and b of the workpiece W immersed in the cleaning liquid A, the cleaning liquid does not easily flow even by the vertical movement of the workpiece W, and therefore the cleaning liquid is removed from the inner walls of the holes a and b. Dirt and dust are stored in the holes a and b.

Such ultrasonic cleaning is performed for a predetermined time (for example, 10
After continuing for a second), the work W is taken out from the cleaning liquid A together with the bucket 5 by the work holding device 6 as shown in FIG. Thereby, the holes a and b of the work W are
Dirt, dust, and the like stored inside are discharged from the holes a and b together with the cleaning liquid A that has entered the holes a and b.

Further, at this time, the work W is raised so as to be taken out from the cleaning liquid A, so that each part of the work W facing the cleaning liquid A surely passes through the depth in which cavitation is remarkable in the cleaning liquid A. , Work W
The entire surface of the work W and the inner walls of the holes a and b are effectively cleaned and deburred until just before being removed from the cleaning liquid A. Therefore, in particular, dirt, dust, etc. stored in the holes a and b of the work W will not be reattached to the inner wall of the holes a and b when the work W is taken out of the cleaning liquid A, and the dirt and dust can be surely secured. The cleaning liquid A is discharged from inside the holes a and b.

Next, the work W together with the bucket 5 is again immersed in the cleaning liquid A, and the above-described work is repeated for a predetermined time (for example, 1 minute) to complete the ultrasonic cleaning of the work W.

In the present embodiment, the cleaning liquid A in the cleaning tank 1 circulates through the circulation path 4 and, during the circulation process, is appropriately filtered and deaerated by a filter and a deaeration device (not shown). Done. As a result, the cleaning liquid A is kept clean and cavitation is favorably generated.

As described above, in the ultrasonic cleaning of this embodiment, the work W is once taken out of the cleaning liquid A during the cleaning, and the cleaning liquid A in the holes a and b of the work W is discharged. Since the cleaning liquid A is scavenged, dirt and dust removed from the inner walls of the holes a and b of the work W in the cleaning liquid A are appropriately discharged together with the cleaning liquid A from the insides of the holes a and b. It is possible to prevent the dirt and dust from adhering again to the inner walls of the holes a and b in the cleaning liquid A. Therefore, the work W is certainly washed not only on its surface but also on the inner walls of the holes a and b.

In this embodiment, the work W is simply raised to be taken out of the cleaning liquid A and the cleaning liquid A in the holes a and b of the work W is discharged, but the discharging is performed more smoothly. It is needless to say that the work W can be tilted with the work W taken out of the cleaning liquid A for the purpose of tightening.

Further, in this embodiment, the work W is moved up and down in the cleaning liquid A for a predetermined time, and then the work W is taken out of the cleaning liquid A. The work W may be taken out of the cleaning liquid A at the same time as the upward movement.

[0028]

As is apparent from the above description, according to the present invention, the work W is taken out of the cleaning liquid at least once in the process of immersing the work W in the cleaning liquid and performing ultrasonic cleaning. By allowing the cleaning liquid in the hole to be discharged, it is possible to prevent dirt, dust, etc. stored in the hole in the cleaning liquid from adhering again to the inner wall of the hole, and the surface of the work is Of course, the cleaning and deburring of the work can be surely performed even in the work hole portion.

Further, by vertically moving the work in the cleaning liquid, the cleaning and deburring can be surely and uniformly performed over the entire surface of the work and the inner wall of the hole.

[Brief description of drawings]

FIG. 1 is an explanatory diagram for explaining an ultrasonic cleaning device to which the present invention has been applied.

FIG. 2 is an explanatory diagram for explaining an ultrasonic cleaning device to which the present invention has been applied.

[Explanation of symbols]

 W ... Work, a, b ... Hole, A ... Cleaning liquid.

Claims (2)

[Claims] 1. An ultrasonic cleaning method for cleaning and deburring a work by irradiating ultrasonic waves into the cleaning liquid while immersing the work having holes on the surface in the cleaning liquid. At the same time, the ultrasonic cleaning method further comprises a step of taking out the work from the cleaning liquid at least once and discharging the cleaning liquid from the hole of the work at the time of taking out the work. 2. The ultrasonic cleaning method according to claim 1, further comprising a step of moving the work up and down while the work is immersed in the cleaning liquid when the work is cleaned.