JPH07171516A - Work washing method and apparatus - Google Patents

Abstract

PURPOSE:To reduce noise at the time of the washing of a work and to obtain excellent washing effect. CONSTITUTION:A work mounting process inserting a work W into an inner tank 4 in such a state that the inner tank 4 and an outer tank 1 are empty, a liquid storing process storing a liquid in the inner and outer tanks 4,1 and a first washing process injecting a pressurized washing soln. toward the work W from the jet nozzle 10 in the inner tank 4 through the liquid in such a state that the inner tank 4 is hermetically closed and discharging the excessive washing soln. in the inner tank 4 from an overflow passage 7 are provided. Further, a drying process ejecting compressed air toward the work W in the same attaching state as the first washing process after the liquid in the outer and inner tanks 1,4 is discharged and a work taking-out process taking out the work W in the inner tank 4 after the liquid in the outer tank 1 is discharged are provided.

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 a work for removing foreign matter such as cutting chips, cutting oil used during processing, and abrasives during processing of an article formed by machining or the like, and a cleaning method therefor. The present invention relates to a work cleaning device for carrying out.

[0002]

2. Description of the Related Art As an example of a conventional work cleaning apparatus, there is JP-A-61-1184. According to this, the item to be cleaned is immersed in water, a nozzle is arranged at a constant distance from the surface of the component, pressurized water is jetted from the nozzle toward the surface of the component, and cavitation is generated near the surface. The foreign matter adhering to the surface is removed.

[0003]

The conventional cleaning device has the following problems to be solved. The pressure of the pressurized water sprayed from the nozzle toward the surface of the component is 350 Kg
/ Cm2, which causes a large jet noise when pressurized water is jetted from the nozzle. In addition, the high-pressure water sprayed from the nozzle into the water tank reaches the surface of the component through the still water in the cleaning tank, and during this time, friction occurs between the high-pressure water jet and the still water, causing cavitation bubbles. ,
When the cavitation bubbles reach the surface of the component, they are destroyed to generate a large impact pressure, and the impact pressure removes foreign matter on the surface of the component. At that time, a large impact sound is generated. According to the above, the work environment near the cleaning tank is significantly deteriorated, and it is necessary to reduce the noise. The foreign matter removed from the parts by the above-mentioned cleaning remains in the liquid in the cleaning tank, and the capacity of the cleaning tank is relatively large even if the cleaning tank is provided with discharge means such as an overflow passage. It is not preferable because it is difficult to more effectively remove the foreign matter from the cleaning tank, and when the component is taken out from the cleaning tank, the foreign matter may adhere to the surface of the component again. After the parts are cleaned, they need to be taken out of the cleaning tank and then dried. According to this, the work process is complicated, and the number of man-hours required for moving parts is increased, so that efficient cleaning cannot be performed.

The present invention has been made in view of the above problems, and implements a work cleaning method and a work cleaning method capable of reducing noise generated from a cleaning device and effectively cleaning a work when cleaning the work. It is an object of the present invention to provide a work cleaning device suitable for cleaning.

[0005]

According to the present invention, the method of cleaning a work is such that the outer tank and the inner tank which is placed in the outer tank and is open to the outer tank are empty. The work mounting step of mounting the work on the work support arranged in the inner tank, the liquid storing step of storing the liquid in the outer tank and the inner tank, and the inner tank closed and sealed to the outer tank. Further, in a state where the liquid is stored in the outer tank and the inner tank, the cleaning liquid is sprayed from the injection nozzle toward the workpiece through the liquid in the inner tank, and the excess cleaning liquid in the inner tank is discharged to the outside. Cleaning process and drying process in which the cleaning liquid in the inner tank, which is closed and sealed to the outer tank, is discharged to empty the inner tank, and then compressed air is jetted from the injection nozzle toward the work in the inner tank. After discharging the liquid stored in the outer tank, open the inner tank to the outer tank, Than click support to pick out the workpiece takes place by the workpiece removal step.

In this method of cleaning a work, an outer tank having a bottomed shape and capable of storing a liquid, and an outer tank in the outer tank, which is held in a closed and sealed state or an open state with respect to the outer tank. An inner tank, a work support in the inner tank that detachably supports the work, and a work support that is arranged to face the work in the inner tank.
An injection nozzle capable of injecting either one of the cleaning liquid and compressed air toward the workpiece, an overflow passage for discharging the excess cleaning liquid in the inner tank to the outside, and a cleaning liquid in the inner tank to the outside This is achieved by a work cleaning device including an inner tank discharge path and an outer tank discharge path for discharging the liquid in the outer tank toward the outside.

[0007]

When the inner tank is closed and sealed with respect to the outer tank, the liquid is stored in the outer tank and the liquid is stored in the inner tank, the work is cleaned by the injection nozzle. It is performed by spraying the cleaning liquid toward the work through the liquid. Thus, noise generated during cleaning in the inner tank is blocked by the liquid stored in the outer tank, and thus a quiet cleaning device can be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an outer tank having a bottom and an opening at the top, and water,
A liquid such as a cleaning liquid is supplied into the outer tank 1 through a liquid supply passage 3 having a fifth opening / closing valve 2. The inner tank 4 is arranged and formed in the outer tank 1, and the inner tank 4 is formed by a fixed annular chamber 5 and a movable annular chamber 6. The fixed annular chamber 5 has a cup-like shape extending from the right side wall 1A of the outer tub 1 to the left in the outer tub 1, and an annular flange portion 5A is formed at the left end thereof and opens to the left. A seal member Y such as an O-ring is arranged on the collar portion 5A.

On the other hand, the movable annular chamber 6 is in the outer tub 1 and has a cup-like shape. The movable annular chamber 6 is provided at its right end with an annular collar portion 6A facing the collar portion 5A of the fixed annular chamber 5 and is directed to the right. The movable annular chamber 6 is opened, and the supporting shaft 6B extending leftward from the left end of the movable annular chamber 6 is slidable on the left side wall 1B of the outer tank 1 so that the movable annular chamber 6 is allowed to move to the left and right in FIG. It is movably supported. Thus, the movable annular chamber 6 moves to the right and the collar portion 6A of the movable annular chamber 6 becomes the collar portion 5A of the fixed annular chamber 5.
When contacted with, the inner tank 4 closed and sealed with respect to the outer tank 1 is formed, while the movable annular chamber 6 moves to the left and the flange portion 6A of the movable annular chamber 6 moves to the fixed annular chamber 5. When separated from the collar portion 5A, an opening A is formed between the collar portion 5A of the fixed annular chamber 5 and the collar portion 6A of the movable annular chamber 6, and the inner tank 4 is opened with respect to the outer tank 1. . The lateral movement of the movable annular chamber 6 to the left and right is performed by a second operation member 7 such as a hydraulic cylinder connected to the support shaft 6B.

Reference numeral 8 indicates the inside of the movable annular chamber 6 (in other words, the inner tank 4
A work support disposed in the movable annular chamber 6
An attachment portion 8A for attaching the work W is formed at the right end inside, and the work support 8 is provided with lateral movement and rotation. The work support body 8 is inserted into a guide hole 6C formed in a support shaft 6B of the movable annular chamber 6 and is movably supported sideways and rotatable, and a hydraulic cylinder provided with a motor at the left end thereof, for example. The first operating member 9 such as the above is connected.

Reference numeral 10 denotes a first injection nozzle which is arranged to face the end surface of the work W arranged in the inner tank 4 with a gap and is connected to a first injection passage 12 having a first opening / closing valve 11. , 13 are second injection nozzles arranged to face the side surface of the work W arranged in the inner tank 4 with a gap, and are connected to a second injection passage 15 having a second opening / closing valve 14. The first injection passage 12 and the second injection passage 15 are connected to the cleaning liquid source S and the gas supply source P via the gas-liquid switching valve 16. In the present embodiment, the first injection nozzle 10,
The second injection nozzle 13 is formed integrally with the fixed annular chamber 5. However, the second injection nozzle 13 only needs to be disposed inside the inner tank 4 and facing the work W with a gap, for example, integrally with the movable annular chamber 6. May be provided. Further, the number of injection nozzles is appropriately selected.

An overflow passage 17 connects the inner tank 4 and the atmosphere. In the overflow passage 17 of this embodiment, one end is opened above the fixed annular chamber 5 and the other end is connected to the storage tank T. .

Reference numeral 18 denotes an inner tank discharge passage that connects the inner tank 4 to the atmosphere, and a third opening / closing valve 19 is provided in the passage. One end of the inner tank discharge passage 18 of this embodiment is a fixed annular chamber. 5 was opened at the bottom and the other end was connected to the storage tank T.

Reference numeral 20 denotes an outer tank discharge path for communicating the outer tank 1 with the atmosphere, and a fourth opening / closing valve 21 is provided in the passage. One end of the outer tank discharge path 20 of this embodiment is the outer tank 1. Open at the bottom of
The other end is connected to the storage tank T. The overflow passage 17 and the inner tank discharge passage 18 may be provided in the movable annular chamber 6.
In addition, 22 is a cleaning liquid supply path that connects the cleaning liquid source S and the gas-liquid switching valve 16, and 23 is a gas supply path that connects the gas supply source P and the gas-liquid switching valve 16.

The cleaning of the work W is performed as follows. The movable annular chamber 6 is pulled to the left by the second operation member 7, and the collar portion 6A of the movable annular chamber 6 and the collar portion 5 of the fixed annular chamber 5 are pulled.
A separates from A to form an opening A, and the inner tank 4 formed by the movable annular chamber 6 and the fixed annular chamber 5 is inside the outer tank 1 and is in an open state with respect to the outer tank 1, while Work support 8
Is also pulled to the left by the first operating member 9, and the attachment portion 8A is arranged at the left position as shown in FIG. Further, the inner tank discharge passage 18 is closed by the third opening / closing valve 19, the outer tank discharge passage 20 is kept closed by the fourth opening / closing valve 21, and the liquid supply passage 3 is closed by the fifth opening / closing valve 2. According to the above, the inside of the outer tank 1 and the inside of the inner tank 4 in the open state are empty, and the work attachment portion 8A of the work support 8 faces the opening A. The work W to be mounted is attached to the attachment portion 8A of the work support 8. This step is the work mounting step and is shown in FIG.

Next, the fifth on-off valve 2 is opened to open the liquid supply passage 3
A liquid such as water or a cleaning liquid is supplied into the outer tub 1, and the fifth on-off valve 2 is closed after the constant liquid is supplied into the outer tub 1. When the fifth opening / closing valve 2 is kept open, an overflow passage (not shown) may be provided in the outer tank 1 to return the excess liquid. If the liquid supply passage 3 is not provided, the cleaning liquid may be supplied into the outer tank 1 from the first and second injection nozzles 10 and 13. According to the above, the liquid is stored in the outer tank 1, and the inner tank 4, the work W, the first injection nozzle 10 and the second injection nozzle 13 which are in the open state are immersed in the liquid. This step is a liquid storage step, and the liquid in the outer tank 1 in this state is shown by line BB in FIG.

Then, the movable annular chamber 6 is moved to the right in the figure by the second operating member 7, and the collar portion 6 of the movable annular chamber 6 is moved.
By contacting the collar portion 5A of the fixed annular chamber 5 with A, the inner tank 4 which is in a closed and sealed state with respect to the outer tank 1 is formed, and the liquid is stored in the inner tank 4 in a hermetically sealed manner. The liquid is also stored and held in the outer tub 1 surrounding the outer circumference of 4.
According to the above, the work W attached to the attachment portion 8A,
The first jet nozzle 10 and the second jet nozzle 13 are immersed in the liquid in the inner tank 4 which is in a closed and sealed state, and in this state the work support 8 is moved to the right by the first operating member 9 , The second injection nozzles 10 and 13 are opposed to each other with an appropriate gap and rotated. on the other hand,
The cleaning liquid in the cleaning liquid source S is pressurized by the first spray nozzle 10 and sprayed toward the end surface of the work W. When the cleaning liquid is jetted from the first jet nozzle 10, cavitation occurs near the surface of the end face of the work W by this jet flow,
The foreign matter adhering to the vicinity of the end surface of the work W is removed by the cleaning force of the bubbles generated by the cavitation.

As described above, the cleaning liquid is sprayed from the first spray nozzle 10 by the cleaning liquid supply path 22 and the first spray path 12.
Is communicated with the gas-liquid switching valve 16 and the first opening / closing valve 11 opens the first injection passage 12, and when the work W is washed by the first injection nozzle 10, the work W is discharged from the second injection nozzle 13. It is necessary to prevent the cleaning liquid from being jetted toward the cavities in order to prevent the cavitation generated by the first jet nozzle 10 from being weakened by the second jet nozzle 13. Further, the injection of the cleaning liquid from the second injection nozzle 13 can be stopped by closing the second injection passage 15 with the second opening / closing valve 14.

Then, the work W is discharged from the first injection nozzle 10.
After the cleaning liquid is injected toward the target for a certain period of time, the cleaning by the first injection nozzle 10 is stopped.
It is performed by closing the first injection passage 12 with 1.

Then, the cleaning liquid in the cleaning liquid source S is pressurized by the second spray nozzle 13 and sprayed toward the outer peripheral surface of the work W. When the cleaning liquid is sprayed from the second spray nozzle 13, cavitation is generated in the vicinity of the outer peripheral surface of the work W by this jet flow, and foreign matters attached to the outer peripheral surface of the work W are removed by the cleaning force of the bubbles generated by the cavitation. It In this way, the cleaning liquid is ejected from the second injection nozzle 13 because the cleaning liquid supply path 22 and the second injection path 15 are communicated with each other by the gas-liquid switching valve 16 and the second opening / closing valve 14 is connected to the second injection path 15. Because it will open
The fact that the cleaning liquid is not jetted from the first jet nozzle 10 toward the workpiece W during the washing of the work W by the second jet nozzle 13 means that the cavitation generated by the second jet nozzle 13 is weakened by the first jet nozzle 10. This is to prevent it.

As described above, when the cleaning liquid is sprayed from the first spray nozzle 10 and the second spray nozzle 13 toward the work W arranged in the closed and sealed inner tank 4, the work W is washed. The foreign matter attached to the inner tank 4 is removed and is mixed in the cleaning liquid in the inner tank 4 to be present. However, since the tank volume of the inner tank 4 can be made smaller than that of the outer tank 1,
The cleaning liquid in the overflow passage 1 in a relatively short time
It is possible to discharge the work W to the outside of the inner tank 4 via 7, so that the work W can be cleaned in a cleaning liquid that is always clean.

In this embodiment, two jet nozzles were prepared, but the number of jet nozzles is appropriately selected depending on the shape, size, number of workpieces to be washed. It may be singular. The above is the first cleaning step. Then, at the end of the first cleaning step, the injection of the cleaning liquid from the first injection nozzle 10 and the second injection nozzle 13 is stopped. This is the first opening / closing valve 11, the second opening / closing valve 14, or the gas-liquid switching valve 16
Done by.

Next, the cleaning liquid in the inner tank 4 which is closed and sealed with respect to the outer tank 1 is discharged to empty the inner tank 4, and then compressed air is jetted toward the work W from the jet nozzle. The work W is dried. This opens the inner tank discharge passage 18 by the third opening / closing valve 19 and discharges the cleaning liquid stored in the inner tank 1 into the storage tank T through the inner tank discharge passage 18.
In this state, the gas-liquid switching valve 16 connects the gas supply path 23 to the first injection path 12 and the second injection path 15, and at this time, the first opening / closing valve 11 opens the first injection path 12 and
The on-off valve 14 opens the second injection passage 15. According to the above, the pressurized air in the gas supply source P is jetted from the first jet nozzle 10 and the second jet nozzle 13 toward the work W, whereby the work W is dried. A time difference may be provided between the opening of the first injection nozzle 10 and the opening of the second injection nozzle 13. The above is the drying process. Then, at the end of the drying process, the supply of the pressurized air from the first injection nozzle 10 and the second injection nozzle 13 is stopped.

Next, the liquid in the outer tank 1 is supplied to the fourth opening / closing valve 21.
Is opened to discharge into the storage tank T through the external discharge path 20, and the liquid to be stored in the outer tank 1 is discharged into an empty state. The empty state includes that the liquid level in the outer tank 1 is lower than that in the inner tank 4. In such a state, the rotation of the work W by the work support 8 is stopped, the movable annular chamber 6 is moved leftward by the second operation member 7, and the flange portion 6A of the movable annular chamber 6 is moved to the flange portion 5A of the fixed annular chamber 5. The inner tank 1 is further opened to form the opening A, and the work tank 8 is also moved to the left by the first operating member 9 so that the work W faces the opening A and stops. The positional states of the movable annular chamber 6 and the work support 8 are shown in FIG. Here, the work W is taken out from the attachment portion 8A of the work support 8 through the opening A, and the cleaning of the work W is completed. The above is the workpiece removal process. That is, the method of cleaning a work according to the present invention includes a work mounting step, a liquid storage step, a first cleaning step, a drying step,
This is performed by the work taking out process.

According to such a work cleaning method, the work is cleaned in the closed and sealed inner tank, and the outer circumference of the inner tank is immersed in the liquid in the outer tank. It is possible to greatly reduce the noise generated by the cleaning liquid to be leaked out of the outer tank. Thus, noise reduction during cleaning and drying of the work can be achieved.

Further, the cleaning of the work is performed in the closed and sealed inner tank, and the cleaning liquid removed from the work is discharged to the outside of the inner tank through the overflow passage, and the chamber volume of the inner tank is changed to that of the outer tank. Since the cleaning liquid containing foreign matter in the inner tank can be immediately discharged to the outside of the inner tank, the work can be cleaned with a cleaning liquid that is always clean, and effective cleaning can be performed. it can.

Further, the cleaning liquid in the inner tank is discharged through the inner tank discharge passage, and the inner tank is emptied to inject the pressurized gas toward the work from the injection nozzle. It is not necessary to attach and detach the work piece, and the work can be dried extremely efficiently. Furthermore, since the work piece is taken out of the tank after drying, the cleaning liquid and foreign substances in the cleaning liquid adhere to the work piece again when taking out the work piece. Since there is no fear, the work can be cleaned well.

Further, if the second cleaning process is inserted between the first cleaning process and the drying process, the cleaning effect of the work is more effectively performed. This second cleaning step is performed as follows. At the end of the first cleaning step, the first opening / closing valve 1
1 blocks the first injection passage 12 to stop the injection of the cleaning liquid from the first injection nozzle 10, and the second opening / closing valve 14 closes the second injection passage 15 to inject the cleaning liquid from the second injection nozzle 13. Is stopped, and in this state, the cleaning liquid is stored and held in the inner tank 4 which is in the closed and sealed state. In this state, the third on-off valve 19 is opened and the cleaning liquid in the inner tank 4 is discharged from the inner tank discharge passage 18 toward the storage tank T to empty the inner tank 4. Next, the first opening / closing valve 11 is opened to inject the cleaning liquid from the first injection nozzle 10 toward the work W, and the second opening / closing valve 14 is opened to inject the cleaning liquid toward the work W from the second injection nozzle 13. And inner tank 4
The work W inside is washed. At this time, the cleaning liquid sprayed into the inner tank 4 is sequentially stored in the storage tank T from the inner tank discharge passage 18.
Is discharged toward. In the above, the first injection nozzle 10
There may be a time lag between the cleaning by and the cleaning by the second injection nozzle 13.

[0029]

As described above, according to the present invention, the work is cleaned in the closed and sealed inner tank, and the outer periphery of the inner tank is immersed in the liquid in the outer tank. The noise generated by the cleaning liquid sprayed from the nozzle can be greatly reduced from leaking to the outside of the outer tank, and the cleaning of the work is performed in the closed inner tank, and the cleaning liquid containing foreign matter removed from the work. Since it is immediately discharged to the outside of the inner tank through the overflow passage, the work can be effectively washed. or,
By performing the second cleaning step after the completion of the first cleaning step, the effect of cleaning the work can be further enhanced. Furthermore, since the pressurized gas is sprayed from the spray nozzle toward the work while the inner tank is empty, it is not necessary to attach and detach the work for drying, and the work can be dried extremely efficiently. Further, since the work is taken out of the tank after being dried, there is no possibility that the cleaning liquid and the foreign matter in the cleaning liquid will adhere to the work again at the time of taking out, so that the work can be cleaned well.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a work cleaning apparatus according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an open state of an inner tank in the workpiece cleaning apparatus according to the present invention.

[Explanation of symbols]

 1 Outer tank 4 Inner tank W Work 8 Work support 10, 13 Injection nozzle 17 Overflow passage 18 Inner tank discharge passage 20 Outer tank discharge passage

Claims (3)

[Claims] 1. A work support arranged in the inner tank 4 when the outer tank 1 and the inner tank 4 arranged in the outer tank 1 and open to the outer tank 1 are empty. Work W on body 8
A work mounting process for mounting a liquid, a liquid storing process for storing a liquid in the outer tub 1 and the inner tub 4, and an inner tub 4 closed and sealed with respect to the outer tub 1 in the outer tub 1 and the inner tub 4. A first cleaning process in which the cleaning liquid is sprayed from the spray nozzle 10 toward the work W through the liquid in the inner tank 4 and the excess cleaning liquid in the inner tank 4 is discharged to the outside in the state where the liquid is stored; Outer tank 1
And a drying step of ejecting the cleaning liquid in the closed and sealed inner tank 4 to empty the inner tank 4 and then injecting compressed air from the injection nozzle 10 toward the work W in the inner tank 4. A method for cleaning a work, which comprises a work take-out step of opening the inner tank 4 to the outer tank 1 after discharging the liquid stored in the outer tank 1 and taking out the work W from the work support 8. 2. A work which is placed in the inner tank 4 when the outer tank 1 and the inner tank 4 which is arranged in the outer tank 1 and which is open to the outer tank 1 are empty. A work mounting step of mounting the work W on the support body 8, a liquid storage step of storing a liquid in the outer tank 1 and the inner tank 4, and an inner tank 4 in a closed and sealed state with respect to the outer tank 1 and the outer tank 1 And in a state where the liquid is stored in the inner tank 4, the cleaning liquid is sprayed from the spray nozzle 10 toward the work W through the liquid in the inner tank 4, and the excess cleaning liquid in the inner tank 4 is discharged to the outside. 1 cleaning process and outer tank 1
A second cleaning step in which the cleaning liquid in the inner tank 4 that is closed and sealed is discharged to empty the inner tank 4 and then the cleaning liquid is sprayed from the spray nozzle 10 toward the work W in the inner tank 4. Then, the cleaning liquid in the inner tank 4 which is closed and sealed with respect to the outer tank 1 is discharged to empty the inner tank 4, and then the compressed air is jetted from the jet nozzle 10 toward the work W in the inner tank 4. A method for cleaning a work, which comprises a drying step for performing the above operation, and a step for taking out the work W from the work support 8 by opening the inner tank 4 with respect to the outer tank 1 after discharging the liquid stored in the outer tank 1. . 3. An outer tank 1 having a bottomed shape and capable of storing a liquid.
And an inner tank 4 which is in the outer tank 1 and is maintained in a closed and sealed state or an open state with respect to the outer tank 1, and an inner tank 4
A work support 8 that is inside and that detachably supports the work W, and a jet that is disposed so as to face the work W in the inner tank 4 and that can jet and supply either one of the cleaning liquid and the compressed air toward the work. The nozzle 10, an overflow passage 17 for discharging the excess cleaning liquid in the inner tank 4 to the outside, an inner tank discharge passage 18 for discharging the cleaning liquid in the inner tank 4 to the outside, and an outer tank 1
An apparatus for cleaning a work, comprising: an outer tank discharge path 20 for discharging the liquid inside thereof to the outside.