JP2001340818A - Washing method of object to be washed having incomplete through hole and riveted part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing method of an object to be washed having incomplete through holes by which the incomplete through holes conventionally difficult to be washed can reliably be washed. SOLUTION: In the case of washing an object to be washed having incomplete through holes and riveted parts, heated steam is sprayed to the object as the pre-washing to wash out oil and stain adhering to the surface of the object and then the object is immersed in a washing liquid containing warm water stored in a high temperature and high pressure washing tank, and after that, the object is washed by ultrasonic washing in the washing liquid, and at the same time, pressurizing and degassing steps are repeated several times in the high temperature and high pressure washing tank to discharge the gas layers in the incomplete through holes and riveted parts, and simultaneously, the washing liquid is discharged out and introduced into the tank and further the washing liquid is heated to a high temperature and a high pressure to carry out high temperature and high pressure washing. After that, the high temperature and high pressure washing tank is further pressurized and then the high temperature and high pressure washing liquid is discharged to the atmosphere at once to forcibly remove the washing liquid in the holes and riveted parts of the object, and after that, the high temperature and high pressure washing tank is kept in vacuum state to dry the object by the thermal energy received by the object during the high temperature and high pressure washing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of cleaning an object to be cleaned having a small diameter and a deep non-through hole or a rivet, such as a synthetic fiber nozzle.

[0002]

2. Description of the Related Art Generally, the inside of a non-through hole formed in a metal part such as a synthetic fiber nozzle is
Chips, drill cutting oil and the like generated during the drilling process are attached and contaminated, and therefore, it is necessary to clean the inside of the hole to remove the chips and the cutting oil.

However, it is very difficult to clean the inside of the non-through hole compared to the through hole. That is, the through-hole allows liquid (water-based, hydrocarbon-based solvent, etc.) or gas (air, steam) or the like used for cleaning to forcibly pass through the hole, and the cut-off attached to the inside of the hole. Powder and drill cutting oil can be easily washed, and in the drying process after washing, dewatering and drying are easily performed by forcibly passing hot air etc., and drying in a short time is possible. It is possible.

On the other hand, in the case of a non-through hole, the cleaning fluid cannot be forced to pass through the inside of the hole, so that the cleaning efficiency is extremely low. Further, since the air inside the holes prevents the cleaning surface from contacting the cleaning fluid, the air in the holes is usually driven out by vacuuming and replaced with the cleaning liquid to improve the cleaning effect. However, if the depth of the hole is still deep, the cleaning liquid does not reach the inside of the hole, the cleaning liquid that has entered the hole does not move inside the hole, and it can be replaced with a fresh cleaning liquid outside the hole. Since there is no cleaning effect, the cleaning effect is extremely poor.

Therefore, recently, attempts have been made to improve the cleaning effect by using ultrasonic waves. However, in the case where the pore diameter is small and deep, the effect of ultrasonic waves cannot be expected at all. In addition, after the cleaning step, the cleaning liquid remains in the pores, which imposes a heavy burden on the drying step. In particular, in the case of a small diameter and deep non-through hole such as a synthetic fiber nozzle, even if the opening of the hole faces downward, there is almost no drainage effect. Drying the liquid remaining in such holes is extremely disadvantageous because the evaporation surface of the liquid is small with respect to the liquid amount, and therefore requires a large amount of heat energy and time.

At present, as a method that is surely effective in cleaning such a small-diameter and deep non-through hole, a small-diameter pipe such as an injection needle is inserted into the hole, and the cleaning liquid (liquid) is inserted through the pipe. , Gas) is being studied into the holes, but this method is extremely complicated in workability and has not been put to practical use.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and cleans an object to be cleaned which has been difficult to clean, such as a synthetic fiber nozzle, having a small diameter and having a deep non-through hole or rivet processing. An object of the present invention is to provide a cleaning method that can be performed reliably and at low cost.

[0008]

In order to achieve the above object, when cleaning an object to be cleaned having a non-penetrating hole or a rivet, the object to be cleaned is sprayed with heated steam as pre-cleaning. After steam cleaning the oil and dirt attached to the surface of the object, the object to be cleaned is immersed in a cleaning solution composed of warm water contained in a high-temperature high-pressure cleaning tank, and then the object to be cleaned is ultrasonically cleaned in the cleaning solution. At the same time, pressurization and degassing are repeated several times in the high-temperature and high-pressure cleaning tank to discharge the non-through hole of the object to be cleaned and the gas layer of the rivet processing part, and at the same time let the cleaning liquid be taken out and put in. After high-temperature and high-pressure cleaning by heating, the inside of the high-temperature and high-pressure cleaning tank is further pressurized and the high-temperature and high-pressure cleaning liquid is discharged to the atmosphere at once, thereby forcibly removing the cleaning liquid in the holes and rivets of the cleaning object. And at the same time After, in which an object to be cleaned with high-temperature high-pressure cleaning tank a vacuum state is to be dried applied thermal energy at high temperature high pressure cleaning.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment in which an object to be cleaned having a non-through hole is cleaned by the method of the present invention.

FIG. 1 is a schematic structural view showing a high-temperature and high-pressure cleaning apparatus for explaining an embodiment of the method for cleaning an object to be cleaned having a non-through hole according to the present invention, wherein (1) is a cover (2). ), The object to be cleaned (3) having the non-through hole (3a) to be cleaned can be accommodated therein by a suitable charging means (not shown).

In the high-temperature and high-pressure washing tank (1), one end of a first pipe (4) is connected to the upper part, and the other end of the first pipe (4) is connected to a pressurizing means such as a compressor (not shown). Connected to. A pressurizing valve (5) is provided in the middle of the first pipe (4).
By opening the high pressure and high temperature washing tank (1), air can be injected into the high pressure and high temperature washing tank (1) to pressurize the inside of the high pressure and high temperature washing tank (1). The second pipe (6) is connected to the first pipe (4).
The other end of the second pipe (6) is connected to a deaeration means such as a vacuum pump (not shown). A deaeration valve (7) is provided in the middle of the second pipe (6), and the air inside the high-temperature and high-pressure washing tank (1) is opened by opening the deaeration valve (7) if necessary. , A second pipe (6),
The gas is discharged through the first pipe (4) so that the inside of the high-temperature and high-pressure cleaning tank (1) can be degassed.

In the high-temperature high-pressure washing tank (1), one end of a third pipe (8) is connected to the bottom thereof, and the other end of the third pipe (8) is connected to a cleaning liquid supply device (not shown). ing. A supply valve (9) is provided in the middle of the third pipe (8). When the supply valve (9) is opened as needed, the high-temperature and high-pressure is supplied from the cleaning liquid supply device through the third pipe (8). Warm water (about 80-100 ° C) in the washing tank (1)
Cleaning liquid (10) can be supplied. Third
One end of a fourth pipe (11) is connected to the pipe (8), and the other end of the fourth pipe (11) is connected to a cleaning liquid recovery tank (not shown). A discharge valve (12) is provided in the middle of the fourth pipe (11), and the cleaning liquid (10) in the high-temperature and high-pressure cleaning tank (1) is opened by opening the discharge valve (12) as necessary. Third pipe (8), fourth pipe (1
The cleaning liquid can be discharged to the cleaning liquid discharge site through 1).

Further, in the high-temperature and high-pressure cleaning tank (1), an ultrasonic oscillator (13) is disposed, and by activating the ultrasonic oscillator (13), the high-temperature and high-pressure cleaning tank (1) is activated. Ultrasonic vibration can be applied to the cleaning liquid (10) in the inside.

Further, in the high-temperature and high-pressure cleaning tank (1), a heater (not shown) and a circulation pump (not shown) are provided outside, and the cleaning liquid (10) is heated to a high temperature (10) by the heater and the circulation pump.
(About 0 to 200 ° C.).

Next, the non-through hole (3a) is formed by the method of the present invention.
The case where the object to be cleaned (3) having the above is performed will be described.

First, in the method of the present invention, prior to cleaning the object (3) to be cleaned by the high-temperature and high-pressure cleaning device described above, the object to be cleaned (3) is heated with a spray nozzle by a spray nozzle before cleaning. (About 80 to 120 ° C.) for a predetermined time (about several minutes) to perform steam cleaning. In the steam cleaning, oil, dirt, and the like adhering to the surface of the object to be cleaned (3) are washed away by spraying the heated steam onto the object to be cleaned (3) at the speed and temperature of the heated steam.

Next, the pre-cleaned object (3) is cleaned by the high-temperature and high-pressure cleaning apparatus described above. That is, a cleaning liquid (10) composed of warm water (about 80 to 100 ° C.) is supplied to the high-temperature and high-pressure cleaning tank (1) to store the cleaning liquid (10) in the high-temperature and high-pressure cleaning tank (1), and the cleaning target ( 3) Open the lid (2) and immerse it in the cleaning liquid (3) contained in the high-temperature and high-pressure cleaning tank (1). The object to be cleaned (3) is the cleaning liquid (10) with the surface with the non-through hole (3a) opened facing downward.
As shown in FIG. 2A, air is sealed in the non-through hole (3a) of the object (3) to be cleaned. Thereafter, the lid (2) is closed and the high-temperature and high-pressure cleaning tank (1) is closed.

Next, the ultrasonic oscillator (13) is activated to ultrasonically vibrate the cleaning liquid (10) to start ultrasonic cleaning by applying the object to be cleaned (3) with the cleaning liquid (10).

Next, the object to be cleaned (3) is subjected to ultrasonic cleaning, and at the same time, the pressure valve (5) is opened to pressurize the inside of the high-pressure and high-temperature cleaning tank (1) by pressurizing means. In this case, the pressure for pressurizing the inside of the high-temperature high-pressure washing tank (1) is not particularly limited, but a range of 5 to 10 kg / cm ² is appropriate. By pressurizing the inside of the high-temperature and high-pressure cleaning tank (1) in this manner, the pressure in FIG.
As shown in (B), the non-through hole (3
The cleaning liquid (10) is pressed into a). Here, the amount of the cleaning liquid press-fitted into the non-through hole (3a) of the object to be cleaned (3) is press-fitted until it balances with the increased pressure repelling force due to the compression of air in the non-through hole (3a). Therefore, as the pressure to be applied is higher, the cleaning liquid (1) pressed into the non-through hole (3a) is
The capacity of 0) increases. For example, high-temperature high-pressure washing tank (1)
If the internal pressure is increased to 10 kg / cm ² , the air in the non-through hole (3a) is compressed to about 1/10, and most of the non-through hole (3a) is filled with the cleaning liquid (10).

Next, after closing the pressurizing valve (5), the deaeration valve (7) is opened at a stretch, and the inside of the cleaning tank (1) is deaerated at a stretch by the deaeration means. This deaeration is performed to return the inside of the high-temperature and high-pressure cleaning tank (1) to atmospheric pressure. By degassing the inside of the high-temperature and high-pressure cleaning tank (1) to the atmospheric pressure at a stretch, the compressed air in the non-through hole (3a) of the object to be cleaned (3) expands at a stretch to return to the original volume. Returning to FIG. 2 (C), the cleaning liquid (10) in the non-through hole (3a) is blown out, and the cleaning liquid (10) adheres to the inside of the non-through hole (3a) at this time. The contaminants (a) such as the swarf and the cutting oil are poured out. Thereafter, the operation of pressurizing the inside of the high-temperature and high-pressure washing tank (1) and the operation of degassing the inside of the high-temperature and high-pressure washing tank (1) at a stretch are repeated several times (about 2 to 5 times) to obtain the object to be cleaned. The contaminant (a) in the non-through hole (3a) of (3) can be almost completely removed.

Next, the cleaning liquid (10) in the high-temperature and high-pressure cleaning tank (1) is heated to a high temperature (about 100 to 200 ° C.) by a heater and a circulation pump provided outside and for a predetermined time (2 to 10 minutes). Degree) Circulate and wash at high temperature and pressure.

Then, after the inside of the high-temperature and high-pressure cleaning tank (1) is further pressurized to a high temperature (about 5 to 10 kg / cm ² ), the discharge valve (12) is opened and the cleaning liquid (1) in the high-temperature and high-pressure cleaning tank (1) is opened. 1
0) is discharged to the washing liquid recovery tank at a stretch while maintaining the high temperature and the high pressure. The cleaning liquid (10) in the non-through hole (3a) of the object to be cleaned (3) is discharged at once by the high temperature and high pressure drainage operation of the cleaning liquid (10) due to the pressure difference between the high temperature and high pressure cleaning tank (1) and the cleaning liquid recovery tank. Is done. Thereafter, when the high-temperature and high-pressure cleaning tank (1) is evacuated by a vacuum pump, the object to be cleaned (3) is heated to a high temperature by the heat energy applied at the time of high-temperature and high-pressure cleaning. Dry with heat radiation.

[0023]

[Table 1]

[0024]

[Table 2]

Tables 1 and 2 show evaluation criteria and cleaning evaluations of cleaning tests performed to confirm the effects of the present invention. Work No. 1 is a work cleaned by the conventional cleaning method, and work No. 2 is a work cleaned by the cleaning method of the present invention. That is, the workpiece No. 1 is subjected to steam cleaning with heated steam at 120 ° C. for 5 minutes, then washed with warm water at 80 ° C. for 10 minutes, and simultaneously with ultrasonic cleaning for 3 minutes. Work N
o2, after steam cleaning with heating steam of 120 ° C. for 1 minute,
Washing with warm water is repeated 3 times in 5 minutes in hot water at 80 ° C, pressurization and deaeration. Simultaneously, ultrasonic cleaning is performed for 3 minutes, and then hot water is heated to 120 ° C and washed at high temperature and high pressure. It discharges high-pressure hot water at a stretch.

From Table 2, it can be seen that work No. 1 is work No. 2
It is clear that the method of cleaning the inside of the hole is better, and the cleaning method of the present invention can surely perform the cleaning of the inside of the non-through hole, which has been difficult to clean.

In the above description, the object to be cleaned having a non-through hole is described. However, the present invention is not limited to the object to be cleaned having a non-through hole, but the object to be cleaned having a rivet process. Can also be applied.

[0028]

As described above, according to the cleaning method of the present invention, an object to be cleaned having a non-through hole or rivet processing is immersed in a cleaning liquid made of hot water stored in a high-temperature high-pressure cleaning tank. In the high-temperature high-pressure cleaning tank, pressurization and degassing are repeated several times to discharge the non-through holes of the object to be cleaned and the gas layer of the rivet processing part, and at the same time to let the cleaning liquid in and out, so that cleaning is difficult. The internal cleaning of the existing non-through hole and the rivet processing portion can be reliably performed. In addition, steam cleaning is performed by spraying heated steam on the object to be cleaned as pre-cleaning, and ultrasonic cleaning and high-temperature high-pressure cleaning are performed in the high-temperature and high-pressure cleaning tank. The internal cleaning of the non-penetrating hole can be performed more reliably by the synergistic effect of the cleaning effect of air, the ultrasonic cleaning effect and the high-temperature high-pressure cleaning effect. Furthermore, after the high-pressure and high-temperature cleaning, the cleaning liquid in the high-temperature and high-pressure cleaning tank is immediately released to the atmosphere at high temperature and high pressure and discharged, thereby forcibly discharging the non-through hole of the object to be cleaned and the cleaning liquid in the rivet processing part. In addition to the above, the object to be cleaned can be dried by natural heat radiation with the thermal energy given at the time of high-temperature and high-pressure cleaning, and drying after the cleaning is easy.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a non-through hole cleaning apparatus used in an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an operation state of a cleaning liquid in a cleaning method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning tank 2 Lid 3 Work 3a Non-through hole 4 First piping 5 Pressure valve 6 Second piping 7 Deaeration valve 8 Third piping 9 Supply valve 10 Cleaning liquid (hot water) 11 Fourth piping 12 Discharge valve 13 Ultrasonic oscillator

Claims (1)

[Claims] When cleaning an object to be cleaned having a non-through hole or rivet processing, the object to be cleaned is sprayed with heated steam as pre-cleaning, and the object to be cleaned is subjected to steam cleaning. Immersed in a cleaning solution made of warm water contained in the washing solution, then ultrasonically clean the object to be cleaned in the cleaning solution, and simultaneously pressurized and degassed several times in a high-temperature and high-pressure cleaning tank to remove the object to be cleaned. At the same time as discharging the gas layer in the non-through holes and the rivet processing part, the cleaning liquid is taken in and out, and the cleaning liquid is heated and circulated at a high temperature and high pressure to perform high temperature and high pressure cleaning. A hot water cleaning liquid is discharged to the atmosphere at a stretch, and then the inside of the high-temperature and high-pressure cleaning tank is dried under vacuum to dry the object having non-through holes and rivets.