JP2660385B2 - Work cleaning method and work cleaning apparatus - Google Patents

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 workpiece for removing foreign matter such as cutting chips, cutting oil and abrasives used in processing an article formed by machining or the like, and the cleaning method. The present invention relates to a work cleaning apparatus for performing the above.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 61-8184 discloses an example of a conventional work cleaning apparatus. According to this method, the article to be cleaned is immersed in water, a nozzle is arranged at a fixed distance from the surface of the component, and pressurized water is sprayed from the nozzle toward the surface of the component to generate cavitation near the surface. And the foreign matter adhering to the surface is removed.

[0003]

The conventional cleaning apparatus has the following problems to be solved. The pressure of the pressurized water injected from the nozzle toward the surface of the part is 350 kg
/ Cm2, which causes a loud jetting noise when the pressurized water is jetted from the nozzle. The high-pressure water injected from the nozzle into the water tank passes through the still water in the cleaning tank and reaches the surface of the component. During this time, friction occurs between the high-pressure water jet and the still water, and cavitation bubbles are generated. ,
When the cavitation bubbles reach the surface of the component, they break and generate a large impact pressure. The impact pressure removes foreign matter on the surface of the component. At this time, a loud impact sound is generated. According to the above, the working environment in the vicinity of the location where the cleaning tank is disposed is significantly deteriorated, and it is necessary to reduce such noise. The foreign matter removed from the parts by the above-described cleaning remains in the liquid in the cleaning tank, and the capacity of the cleaning tank is relatively large even if a discharging means such as an overflow passage is provided in the cleaning tank. It is difficult to more effectively discharge the foreign substance out of the cleaning tank, and when removing the component from the cleaning tank, the foreign substance may adhere to the surface of the component again, which is not preferable. After the parts have been cleaned, they need to be taken out of the cleaning tank and then dried. According to this, the work process is complicated, the number of work steps due to the movement of parts and the like increases, and efficient cleaning cannot be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and when performing the cleaning of a workpiece, a method of cleaning a workpiece capable of reducing noise generated from a cleaning device and effectively cleaning the workpiece, and implementing the cleaning method. It is an object of the present invention to provide a work cleaning apparatus suitable for the work.

[0005]

According to the present invention, there is provided a method of cleaning a work, wherein an outer tub and an inner tub disposed in the outer tub and open to the outer tub are empty. A work mounting step of mounting a work on a work support placed in the inner tank; a liquid storing step of storing liquid in the outer tank and the inner tank; In addition, in a state in which the liquid is stored in the outer tank and the inner tank, a first cleaning liquid is ejected from the injection nozzle toward the work through the liquid in the inner tank and the excess washing liquid in the inner tank is discharged to the outside. A cleaning step and a drying step in which the cleaning liquid in the inner tank that is closed and sealed with respect to the outer tank is discharged to empty the inner tank, and then the compressed air is sprayed from the injection nozzle toward the work in the inner tank. After discharging the liquid stored in the outer tank, the inner tank is opened to the outer tank, Than click support to pick out the workpiece takes place by the workpiece removal step.

In such a method of cleaning a work, an outer tank which has a bottomed shape and is capable of storing liquid is provided in the outer tank, and the outer tank is held in one of a closed state and an open state. An inner tank, a work support in the inner tank for detachably supporting the work,
An injection nozzle capable of injecting and supplying one of the cleaning liquid and the compressed air toward the work, an overflow passage for discharging excess cleaning liquid in the inner tank to the outside, and discharging the 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 to the outside.

[0007]

In the cleaning of the work, the inner tank is closed from the outer tank and the liquid is stored in the outer tank while the liquid is stored in the inner tank. This is performed by spraying the cleaning liquid toward the workpiece through the liquid. Thus, noise generated during cleaning in the inner tank is cut off by the liquid stored in the outer tank, and a quiet cleaning apparatus can be provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an outer tank having a bottom and an open top, and water,
A liquid such as a cleaning liquid is supplied into the outer tank 1 from a liquid supply path 3 provided with a fifth on-off valve 2. The inner tank 4 is disposed 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 shape extending from the right side wall 1A of the outer tub 1 to the left inside the outer tub 1, and an annular flange 5A is formed at the left end thereof and opens leftward. A seal member Y such as an O-ring is disposed on the flange 5A.

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

Reference numeral 8 denotes the inside of the movable annular chamber 6 (in other words, the inner tank 4).
(Inside), the movable annular chamber 6
An attachment portion 8A for attaching the work W is formed at the right end inside the inside, and the work support 8 is provided with movement and rotation to the left and right sides. The work support 8 is inserted into a guide hole 6C drilled in a support shaft 6B of the movable annular chamber 6, and is supported so as to freely move and rotate laterally. A hydraulic cylinder provided with, for example, a motor at the left end thereof The first operation member 9 as shown in FIG.

Reference numeral 10 denotes a first injection nozzle arranged opposite to an end face of the work W disposed in the inner tank 4 with a gap therebetween, and is connected to a first injection path 12 having a first on-off valve 11. Reference numeral 13 denotes a second injection nozzle disposed opposite to a side surface of the work W disposed in the inner tank 4 with a gap therebetween, and is connected to a second injection path 15 having a second on-off valve 14. The first injection path 12 and the second injection path 15 are connected to a cleaning liquid source S and a gas supply source P via a gas-liquid switching valve 16. In the present embodiment, the first injection nozzle 10,
Although the second injection nozzle 13 is formed integrally with the fixed annular chamber 5, it is only necessary that the second injection nozzle 13 be located inside the inner tank 4 and be opposed to the work W with a gap therebetween. May be provided. Further, the number of injection nozzles is appropriately selected.

Reference numeral 17 denotes an overflow passage for communicating the inner tank 4 with the atmosphere. In the overflow passage 17 of the present 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 path for communicating the inner tank 4 with the atmosphere. The inner tank 4 is provided with a third on-off valve 19 in the passage. One end of the inner tank discharge path 18 in this embodiment is a fixed annular chamber. 5, 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. The outer tank has a fourth opening / closing valve 21 in the passage. Open at the bottom of the
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.
Reference numeral 22 denotes a cleaning liquid supply path connecting the cleaning liquid source S and the gas-liquid switching valve 16, and reference numeral 23 denotes a gas supply path connecting 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 operating member 7, and the flange 6A of the movable annular chamber 6 and the flange 5 of the fixed annular chamber 5 are moved.
A is separated 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 in the outer tank 1 and is open with respect to the outer tank 1. Work support 8
2 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 path 18 is closed by a third on-off valve 19, the outer tank discharge path 20 is closed and held by a fourth on-off valve 21, and the liquid supply path 3 is closed by the fifth on-off valve 2. According to the above description, the inside of the outer tub 1 and the inside of the inner tub 4 that is in the open state are empty, and the work attachment portion 8A of the work support 8 faces the opening A, and in this state, the work is cleaned from the opening A. The work W to be mounted is attached to the attachment portion 8A of the work support 8. This step is a work mounting step and is shown in FIG.

Next, the fifth on-off valve 2 is opened and the liquid supply passage 3 is opened.
The fifth opening / closing valve 2 is closed after supplying a constant liquid into the outer tank 1 by supplying a liquid such as water or a cleaning liquid into the outer tank 1. When the fifth on-off valve 2 is kept open, an overflow passage (not shown) may be provided in the outer tank 1 to return the excess liquid. When the liquid supply path 3 is not provided, the cleaning liquid may be supplied from the first and second injection nozzles 10 and 13 into the outer tank 1. According to the above, the liquid is stored in the outer tank 1, and the inner tank 4, the work W, the first ejection nozzle 10, and the second ejection nozzle 13 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.

Next, the movable annular chamber 6 is moved rightward in the figure by the second operating member 7, and the flange 6 of the movable annular chamber 6 is moved.
A is in contact with the flange 5A of the fixed annular chamber 5 to form an inner tank 4 which is in a closed and sealed state with respect to the outer tank 1. Liquid is stored in the inner tank 4 in a sealed manner. The liquid is also stored and held in the outer tank 1 surrounding the outer periphery of 4.
According to the above, the work W attached to the attachment portion 8A,
The first injection nozzle 10 and the second injection nozzle 13 are immersed in the liquid in the inner tank 4 in a closed and sealed state, and in this state, the work support 8 is moved rightward by the first operation member 9 and , Are arranged opposite to the second injection nozzles 10 and 13 with an appropriate gap and rotated. on the other hand,
The cleaning liquid in the cleaning liquid source S is pressurized from the first injection nozzle 10 and injected toward the end face of the work W. When the cleaning liquid is injected from the first injection nozzle 10, cavitation is generated near the surface of the end face of the work W by this jet,
The foreign matter attached to the vicinity of the end face of the work W is removed by the cleaning power of the bubbles generated by the cavitation.

The cleaning liquid is injected from the first injection nozzle 10 in this manner because the cleaning liquid supply path 22 and the first injection path 12
Is communicated by the gas-liquid switching valve 16 and the first on-off valve 11 opens the first injection path 12. When the work W is washed by the first injection nozzle 10, the work W Is not necessary to prevent the cavitation generated by the first injection nozzle 10 from being weakened by the second injection nozzle 13. Further, the injection of the cleaning liquid from the second injection nozzle 13 is stopped by closing the second injection path 15 with the second on-off valve 14.

Then, the work W is supplied from the first injection nozzle 10.
The cleaning by the first injection nozzle 10 is stopped after the cleaning liquid is injected for a predetermined time toward the first opening / closing valve 1.
1 by closing the first injection path 12.

Next, the cleaning liquid in the cleaning liquid source S is pressurized by the second injection nozzle 13 and injected toward the outer peripheral surface of the work W. When the cleaning liquid is injected from the second injection nozzle 13, cavitation is generated near the outer peripheral surface of the work W by the jet flow, and foreign matters attached to the outer peripheral surface of the work W are removed by the cleaning power of bubbles generated by the cavitation. You. The reason why the cleaning liquid is injected from the second injection nozzle 13 is that the cleaning liquid supply path 22 and the second injection path 15 are connected by the gas-liquid switching valve 16 and the second on-off valve 14 connects the second injection path 15. Because it ’s open.
The fact that the cleaning liquid is not injected from the first injection nozzle 10 toward the work W during the cleaning of the work W by the second injection nozzle 13 means that the cavitation generated by the second injection nozzle 13 is weakened by the first injection nozzle 10. This is to prevent it.

As described above, when the cleaning liquid is sprayed from the first injection nozzle 10 and the second injection nozzle 13 toward the work W disposed in the inner tank 4 in a closed and sealed state, the work W is cleaned. Although the foreign matter adhering to the inner tank 4 is removed and mixed in the cleaning liquid in the inner tank 4, the inner tank 4 has a smaller tank volume than the outer tank 1.
The cleaning solution in the overflow passage 1
The work W can be discharged to the outside of the inner tank 4 via the cleaning tank 7 and the work W can always be washed in a clean washing liquid.

Although two injection nozzles are prepared in this embodiment, the number of the injection nozzles is appropriately selected depending on the shape, size, number, etc. of the workpiece to be cleaned. 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 because the first on-off valve 11, the second on-off valve 14 or the gas-liquid switching valve 16
Done by

Next, the cleaning liquid in the inner tank 4 that is in a closed and sealed state with respect to the outer tank 1 is discharged to empty the inner tank 4, and then compressed air is injected from the injection nozzle toward the work W. The work W is dried. In this case, the inner tank discharge path 18 is opened by the third opening / closing valve 19, and the cleaning liquid stored in the inner tank 1 is discharged into the storage tank T via the inner tank discharge path 18.
In such a state, the gas supply path 23 is connected to the first injection path 12 and the second injection path 15 by the gas-liquid switching valve 16, and at this time, the first on-off valve 11 opens the first injection path 12,
The on-off valve 14 opens the second injection path 15. According to the above, the pressurized air in the gas supply source P is injected from the first injection nozzle 10 and the second injection nozzle 13 toward the work W, whereby the work W is dried. A time difference may be provided between opening the first injection nozzle 10 and the second injection nozzle 13. The above is the drying step. Then, at the end of the drying step, 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 on-off valve 21.
Is discharged through the external discharge path 20 into the storage tank T, and the liquid stored in the outer tank 1 is discharged to be empty. This empty state includes that the liquid level in the outer tank 1 is lower than the inner tank 4. In this state, the rotation of the workpiece W by the workpiece support 8 is stopped, and the movable annular chamber 6 is moved leftward by the second operating member 7 so that the flange 6A of the movable annular chamber 6 becomes the flange 5A of the fixed annular chamber 5. The inner tank 1 is opened further by forming the opening A further apart, while the work support 8 is also moved to the left by the first operating member 9, and the work W stops facing the opening A. The positions 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 completely completed. The above is the work removal process. That is, the method of cleaning a work according to the present invention includes a work mounting step, a liquid storing step, a first cleaning step, a drying step,
This is performed by a work removal process.

According to such a work cleaning method, the work is cleaned in the inner tank in a closed and sealed state, and the outer periphery of the inner tank is immersed in the liquid in the outer tank. Leakage of the noise caused by the cleaning liquid to be leaked out of the outer tank can be greatly reduced. Thus, reduction of noise during cleaning and drying of the work can be achieved.

In addition, the work is washed in the closed and sealed inner tank, and the cleaning liquid removed from the work is discharged out of the inner tank through the overflow passage. The cleaning liquid containing foreign matter in the inner tank can be immediately discharged to the outside of the inner tank because the workpiece is always cleaned with a clean cleaning liquid. it can.

Further, according to the fact that the cleaning liquid in the inner tank is discharged through the inner tank discharge path and the inner tank is emptied, and the pressurized gas is jetted from the jet nozzle toward the work, the work for drying the work is dried. It is not necessary to attach and detach the work, and the work of drying the work can be performed very efficiently. Further, since the work is taken out of the tank after drying, the cleaning liquid and foreign substances in the cleaning liquid adhere to the work again when taking out the work. Since there is no fear, good work cleaning can be performed.

Further, when the second cleaning step is inserted between the first cleaning step and the drying step, the effect of cleaning the work is more effectively performed. This second cleaning step is performed as follows. At the end of the first cleaning step, the first on-off valve 1
1 closes the first injection path 12 to stop the injection of the cleaning liquid from the first injection nozzle 10, and the second on-off valve 14 closes the second injection path 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 a 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 path 18 toward the storage tank T, so that the inner tank 4 is emptied. Next, the first on-off valve 11 is opened to inject the cleaning liquid from the first injection nozzle 10 toward the work W, and the second on-off valve 14 is opened to inject the cleaning liquid from the second injection nozzle 13 toward the work W. And inner tank 4
The work W inside is washed. At this time, the cleaning liquid injected into the inner tank 4 is sequentially stored in the storage tank T from the inner tank discharge path 18.
It is discharged toward. In the above, the first injection nozzle 10
There may be a time difference between the cleaning by the second spray nozzle 13 and the cleaning by the second spray nozzle 13.

[0029]

As described above, according to the present invention, the cleaning of the work is performed in the inner tank in a closed and sealed state, 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 out of the outer tank. The cleaning of the work is performed in the closed and sealed inner tank, and the cleaning liquid containing the foreign matter removed from the work. Is discharged immediately out of the inner tank through the overflow passage, so that the work can be effectively cleaned. or,
By performing the second cleaning step after the completion of the first cleaning step, the work cleaning effect can be further enhanced. Furthermore, according to the fact that the pressurized gas is jetted toward the work from the jet nozzle with the inner tank being empty, the work for drying the work is not required, and the work for drying the work can be performed extremely efficiently. Further, since the work is taken out of the tank after drying, the cleaning liquid and foreign substances in the cleaning liquid do not adhere to the work at the time of taking out, so that the work can be cleaned well.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view showing an open state of an inner tank in the work cleaning apparatus according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 outer tank 4 inner tank W work 8 work support 10, 13 injection nozzle 17 overflow passage 18 inner tank discharge path 20 outer tank discharge path

Continuation of the front page (56) References JP-A-1-242183 (JP, A) JP-A-59-186681 (JP, A) JP-A-63-73626 (JP, A) JP-A-2-271159 (JP, A) JP-A-3-101187 (JP, A) JP-A-1-284375 (JP, A) JP-A-49-3471 (JP, A) JP-A-51-45857 (JP, U) JP-A-51-45857 (JP, U) 2-25089 (JP, U)

Claims (3)

(57) [Claims] A work support provided in the inner tank when the outer tank and the inner tank arranged in the outer tank and open to the outer tank are empty. Work W on body 8
And a liquid storage step of storing liquid in the outer tank 1 and the inner tank 4. The inner tank 4 is closed and sealed with respect to the outer tank 1, and the inner tank 4 is in the outer tank 1 and the inner tank 4. A first cleaning step of injecting a cleaning liquid from the injection nozzle 10 through the liquid in the inner tank 4 toward the work W while the liquid is stored, and discharging excess cleaning liquid in the inner tank 4 to the outside; Outer tank 1
A drying step of discharging the cleaning liquid in the inner tank 4 in a closed and sealed state 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. And a work take-out step of opening the inner bath 4 to the outer bath 1 after discharging the liquid stored in the outer bath 1 and taking out the work W from the work support 8. 2. A work placed 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. A work mounting step of mounting the work W on the support 8, a liquid storing step of storing liquid in the outer tank 1 and the inner tank 4, and an inner tank 4 closed and sealed with respect to the outer tank 1 and the outer tank 1. In addition, in a state where the liquid is stored in the inner tank 4, the cleaning liquid is sprayed from the injection 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 washing process and outer tank 1
A second cleaning step of discharging the cleaning liquid in the inner tank 4 in a closed and sealed state to empty the inner tank 4 and then jetting the cleaning liquid from the injection nozzle 10 toward the work W in the inner tank 4. Then, the cleaning liquid in the inner tank 4 in a closed and sealed state with respect to the outer tank 1 is discharged to empty the inner tank 4, and then the compressed air is injected from the injection nozzle 10 toward the work W in the inner tank 4. And a work take-out step of opening the inner tub 4 to the outer tub 1 after discharging the liquid stored in the outer tub 1 and taking out the work W from the work support 8. . 3. An outer tank 1 having a bottomed shape and capable of storing a liquid.
An inner tank 4 in the outer tank 1, which is held in one of a closed state and an open state with respect to the outer tank 1;
And a work support 8 that detachably supports the work W, and a spray that is disposed to face the work W in the inner tank 4 and that can jet one of the cleaning liquid and the compressed air toward the work. A nozzle 10, an overflow passage 17 for discharging excess cleaning liquid in the inner tank 4 to the outside, an inner tank discharge path 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 to the outside.