JP3143354B2 - Method for cleaning machined product and cleaning apparatus used for the method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning method for removing oils such as cutting oil and quenching oil adhering to a machined work (object to be cleaned) after machining or quenching, and the like.
The present invention relates to a cleaning apparatus used in the method .

[0002]

2. Description of the Related Art As an apparatus for cleaning a machined product as described above, a cleaning liquid is sprayed from a spray nozzle to an object to be cleaned from the outside in the air, or an object to be cleaned is immersed in the liquid. In some cases, the cleaning gas is sprayed from the spray nozzle to the object to be cleaned from outside in the liquid.

[0003]

In an object to be cleaned which is a machined object, there are many portions which enter into the object to be cleaned, such as a screw hole and an oil passage for a hydraulic circuit. As a result, the oil and the like in the portion that has entered inside may not be sufficiently removed simply by spraying the cleaning liquid or the cleaning gas from the outside of the object to be cleaned. Low-viscosity oils, such as cutting oils for machining, can be removed relatively easily by spraying the cleaning liquid or cleaning gas on the object to be cleaned as described above, whereas oils for quenching can be removed. In some cases, high-viscosity oils such as quenched oils cannot be sufficiently removed simply by spraying a cleaning liquid or a cleaning gas onto an object to be cleaned as described above. SUMMARY OF THE INVENTION The present invention provides a cleaning apparatus for machined workpieces, which is capable of sufficiently removing oil and the like in a portion that has entered the inside of an object to be cleaned, and also capable of sufficiently removing oil with high viscosity. It is intended to be.

[0004]

The feature of the present invention resides in the following method and apparatus for cleaning a machined product as described above.

[1] In a method of cleaning a machined product, an object to be cleaned is cleaned with a cleaning liquid.
And the pressure in the space above the liquid is reduced to a predetermined low pressure.
Reduce the pressure to boil the liquid,
In the pressurized liquid, the pressure is higher than the predetermined low pressure and the pressure is reduced.
The generated bubbles are ruptured by the recompression effect of the injected air.
Inject air with sufficient pressure.

[2] The method for cleaning a machined product according to claim 1, wherein
Heat the solution to about 90 ° C, and
Reduce the pressure in the side space to about 33.3-40 kPa
Pressure to bring the liquid to a boil, and in the liquid under reduced pressure boiling,
Supply air at atmospheric pressure, and while supplying this air,
75 to 112.5 kPa for the pressure in the space above the liquid
I kept it at the level of Cal.

[3] In a machined washing device, a washing liquid is stored and stored.
A cleaning chamber in which the object to be cleaned is immersed in the liquid;
Reduce the pressure in the space on the side below a predetermined low pressure and boil the liquid
Pressure reducing means for causing the liquid to be higher than the predetermined low pressure in the liquid.
Pressure, the bubbles created by the decompression and the re-pressurization of the injected air
Air with enough pressure to rupture
Injection means, and the decompression means and injection means
With high-pressure air in a state where the space above the liquid is depressurized.
Control means for activating the injection of
To

[4] The apparatus for cleaning a machined product according to claim 3, wherein
A first cleaning unit for cleaning an object;
A second cleaning unit for further cleaning the object to be cleaned,
Injecting a cleaning fluid onto the object to be cleaned into the first cleaning unit
And a second washing unit,
Cleaning chamber for storing cleaning liquid and immersing the object to be cleaned in the liquid
Is provided .

[5] The apparatus for cleaning a machined product according to claim 4, wherein the first cleaning is performed.
Stores a predetermined amount of liquid to immerse the object to be cleaned in the cleaning section
A liquid storage tank to be cleaned and the liquid to be cleaned in the liquid.
Ejection means for injecting the cleaning fluid .

[6] The apparatus for cleaning a machined product according to claim 4 or 5.
In the first cleaning section for cleaning the object to be cleaned,
A first position above a predetermined amount of liquid for immersing the object
And the object to be cleaned is immersed in the liquid over a second position.
Elevating means operable to elevate and lower;
A first jetting means for jetting a cleaning fluid onto the cleaning object,
A second step of injecting a cleaning fluid to the object to be cleaned at the second position;
Injection means.

[7] A cleaning device for a machined product according to claim 3, 4, 5 or 6.
After the cleaning in the second cleaning section, the object to be cleaned is removed.
In the cleaning chamber from which the immersed liquid was extracted,
A steam supply device for injecting steam into the cleaning object is provided.

[0012]

[I] As shown in FIG. 1, an object to be cleaned is first introduced into the first cleaning section 1, and a jetting means 8 of the first cleaning section 1 applies a cleaning fluid (liquid or liquid) to the object to be cleaned. Steam, high-pressure compressed air, etc.). As a result, oil and the like adhering to the outer surface of the object to be cleaned are removed and fall down. In this case, the portion of the oil that has entered the object to be cleaned, such as a screw hole or an oil passage for a hydraulic circuit, may not be sufficiently removed.

When the cleaning in the first cleaning section 1 is completed as described above, the object to be cleaned W is then put into the second cleaning section 2. In the second cleaning unit 2, for example, as shown in FIG. 11B, the space above the liquid M <b> 2 in the second cleaning unit 2 is depressurized in a state where the object to be cleaned W is immersed in the liquid M <b> 2.
As a result, the liquid M2 starts to boil to generate minute cavitation bubbles, and the minute cavitation bubbles grow. In this case, when the pressure in the space above the liquid M2 in the second cleaning unit 2 reaches the saturated vapor pressure at the temperature of the liquid M2 at that time, cavitation bubbles are generated even better.

[0014] The occurrence of small cavitation bubbles and growth outer surface of the object to be cleaned W, so that such a portion entering into inside of the object to be cleaned W of the oil passage or the like for the screw holes and the hydraulic circuit, the object to be cleaned It occurs continuously on every surface of W. Accordingly, due to the generation, growth, and rise to the liquid level of the above-mentioned minute cavitation bubbles, oil and the like attached to the portion that has entered the inside of the article to be cleaned W are removed. And the first
In the cleaning unit 1, oil and the like adhering to the outer surface of the article to be cleaned W are removed to some extent in advance, and the removed oil and the like do not enter the liquid M2 of the second cleaning unit 2.
In the cleaning section 2, the oil and the like in the portion that has entered the inside of the article to be cleaned W are reliably removed by the cavitation bubbles without being disturbed by the above-described oil and the like.

[0015] Then, in the present invention, as shown in FIG.
As shown in FIG.
In a state in which bubbles are generated, the liquid M2 in the second cleaning unit 2
Pressurized air is injected. This allows high pressure air
As a result, the object to be cleaned W is covered,
Of the liquid M2 is slightly recovered. The object to be cleaned
When the pressure of the liquid M2 around the W is recovered, the generated minute
Cavitation bubbles burst, and this burst
Therefore, a large impact force is locally generated instantaneously. this
Washable due to the impact force of cavitation bubble burst
Is the oil or the like adhering to the surface of the object W to be cleaned
And further finely separated by the aforementioned impact force.
Crushed and dispersed in liquid M2.

[0016] The impact due to the burst of one cavitation bubble
Although the generation of impact is local and instantaneous,
All surfaces of the object to be cleaned W and all parts of the liquid M2
Cavitation bubbles are continuously generated in minutes,
The above-mentioned impact force is continuous on all surfaces of the workpiece W
Generated and adhered to all surfaces of the object W to be cleaned.
Oil and the like are further separated and crushed. Mold
The impact force due to the bursting of the foam is estimated to be several hundred atmospheres.
Is strong enough, so that high-viscosity oil is
Even if it adheres to the surface, this high-viscosity oil Also easily detached
And crushed.

[0017] (II) wherein the first cleaning unit 1, where for dipping the object to be cleaned W
A liquid storage tank 1A for storing a fixed amount of liquid M1;
1 for spraying a cleaning fluid onto the object W to be cleaned.
When the spraying means 9 and 10 are provided, the object to be cleaned is first immersed in the liquid M1 in the first cleaning unit 1 and the cleaning means 9 and 10 of the first cleaning unit 1 A cleaning fluid (liquid, steam, high-pressure compressed air, etc.) is injected. As a result, oil and the like adhering to the outer surface of the object to be cleaned are removed, and float on the surface of the liquid M1. As described above, in the first cleaning unit 1, the oil and the like attached to the outer surface of the article to be cleaned W are removed to some extent in advance, and the removed oil and the like do not enter the liquid M2 of the second cleaning unit 2. In the second cleaning section 2, the oil and the like in the portion that has entered the inside of the article to be cleaned W are reliably removed by the cavitation bubbles without being disturbed by the oil and the like.

[0018] [III] liquid in the lower space is formed in the first upper the washing unit 1 M
1 is provided, and an elevating means 29 capable of operating the object to be cleaned up and down is provided. Therefore, when it is determined that cleaning in the air is better, the object to be cleaned is set to the first position above the liquid M1 by the lifting / lowering means 29. Thus, as in the case of the configuration of the preceding item [1], the first cleaning unit 1
A cleaning fluid (liquid, steam, high-pressure compressed air, or the like) is jetted from the first jetting means 8 to the object to be cleaned, and oil and the like attached to the outer surface of the object to be cleaned are removed and fall down. Go. Conversely, if it is determined that it is better to wash while immersed in the liquid M1, the lifting / lowering means 29 is set to the second position where the object to be cleaned is immersed in the liquid M1. As a result, similarly to the case of the configuration [2], the cleaning fluid (liquid, steam, high-pressure compressed air, etc.) is injected from the second injection means 9, 10 of the first cleaning unit 1 to the object to be cleaned. Then, oil and the like adhering to the outer surface of the object to be cleaned are removed and float on the surface of the liquid M1. When it is determined that it is better to perform both the cleaning in the air and the cleaning in a state of being immersed in the liquid M1, the lifting / lowering means 29 moves the object to be cleaned to the first position and the second position. The lifting operation is performed once or a plurality of times. Thus, in the first position, the cleaning fluid (liquid, steam, high-pressure compressed air, etc.) is applied from the first injection unit 8 of the first cleaning unit 1 to the object to be cleaned, as in the case of the configuration [1]. ) Is injected at the second position, as in the case of the configuration [2] above, from the second injection means 9 and 10 to the cleaning object (liquid or steam, high-pressure compressed air). Etc.) are injected. This
As described above, in the first cleaning unit 1, the oil and the like adhering to the outer surface of the article to be cleaned W are removed to some extent in advance, and the removed oil and the like do not enter the liquid M2 of the second cleaning unit 2. Therefore, the second cleaning section 2 reliably removes the oil and the like of the portion that has entered the inside of the article to be cleaned W by the cavitation bubbles without being disturbed by the above-described oil and the like.
I'm going.

[IV] When cleaning by cavitation bubble burst is completed,
As shown in FIG. 12 (a), the liquid M2 is discharged from the bottom of the cleaning chamber 39.
It is pulled out and returned to the lower liquid tank 40. After this,
When all the liquid M2 is drained from the cleaning chamber 39, a vacuum pump
61 keeps the pressure in the cleaning chamber 39 at a pressure lower than the atmospheric pressure.
In the held state, the steam from the steam supply device 14 is subjected to the fourth washing.
The cleaning object W is injected through the cleaning pipe 42. this
As a result, the liquid level rises as the liquid M2 is withdrawn from the cleaning chamber 39.
Floats on the liquid surface when descending along the object to be cleaned W
Even if the oil has re-adhered to the object to be cleaned W as described above,
Grease to remove redeposited oil
Therefore, steam is injected while the pressure in the cleaning chamber 39 is reduced.
By spraying, the redeposited oil is well removed.
You.

[0020]

Or in the air, according to the present invention, in addition to cleaning by injection from the outside of the cleaning fluid in the liquid, by adding the cleaning due to the occurrence and growth of cavitation bubbles, the outer surface and the object to be cleaned of the object to be cleaned Both oils and the like in the portion that has entered inside can be sufficiently removed, and the cleaning performance of the cleaning device for machined products can be improved. Then, the pressure of the cleaning liquid in which the object to be cleaned is immersed is reduced.
In addition to the generation and growth of cavitation bubbles,
The impact force generated by the bursting of the foam
The oil that has entered the inside of the clean
So that even high-viscosity oils can be sufficiently removed.
Therefore, the cleaning performance of the machine
Could be improved.

In the first cleaning section, oil and the like adhering to the outer surface of the object to be cleaned are removed to some extent in advance, and the removed oil and the like do not enter the liquid in the second cleaning section. The cleaning with the cavitation bubbles is performed more reliably, and the cleaning performance of the cleaning device for a machined product can be further improved.

Depending on the shape and type of the object to be cleaned , cleaning by jetting a cleaning fluid in air, cleaning by jetting a cleaning fluid in liquid, cleaning fluid in both air and liquid Since the state of cleaning in the first cleaning section can be selected as in the case of cleaning by spraying, the applicable range of the machine for cleaning machined products can be expanded, and the cleaning performance can be further improved.
Was.

Cleaning by bursting of cavitation bubbles is completed.
After the cleaning is completed, the liquid surface will be cleaned as the liquid is drained from the cleaning chamber.
As it descends along an object, oil floating on the liquid surface is
Even if redeposited on the cleaning object, the steam from the steam supply unit
By spraying on the object to be cleaned, the redeposited oil is collected.
It has the advantage of being eliminated.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. (1) First, the entire cleaning device will be described. As shown in FIG. 1, the supply unit 3 into which the cleaning object W is sent, the first cleaning unit 1 for cleaning the cleaning object W, and the cleaning object W cleaned by the first cleaning unit 1 are further separated. The entire cleaning device is provided with the second cleaning unit 2 for cleaning.

The object to be cleaned W is placed on a support frame (not shown) formed in a plurality of upper and lower shelves on a transmission shaft (not shown) or a transmission gear (not shown) after machining or quenching.
(Above, corresponding to the machined product). The supply unit 3 is provided with a transfer device 4 that can be sent out and pulled back while being bent freely, and the transfer device 4 transfers the object W to be cleaned from the supply unit 3 to the first cleaning unit 1 by the transfer device 4. The cleaning target W of the first cleaning unit 1 is transported to the second cleaning unit 2, and the cleaning target W after cleaning is transported from the second cleaning unit 2 to the supply unit 3 again.

(2) Next, the configuration of the first cleaning unit 1 will be described. As shown in FIGS. 1 and 3, the first cleaning unit 1 is configured in a vertically long room shape, and the lower half of the first cleaning unit 1 (the liquid storage tank 1 </ b> A).
Liquid M1 for cleaning those) (that mix a slight detergent in tap water) and is filled, the supply unit 3 side and the second cleaning portion 2 side in the upper portion than the liquid M1, the air cylinder 5
A first door 6 and a second door 7 which are slid up and down to open and close are provided.

As shown in FIGS. 1, 3 and 5, in the upper half of the first cleaning section 1, a first
The cleaning pipe 8 (corresponding to the injection means and the first injection means)
A large number are arranged on the ceiling and the left and right side walls. On the other hand, as shown in FIG.
A pair of second cleaning pipes 9 (corresponding to an injection unit and a second injection unit) which are provided with a large number of injection ports 9a and are bent in a snake shape are arranged in a pair at the bottom, as shown in FIGS. Three cleaning pipes 10 (corresponding to the injection means and the second injection means) each having a large number of injection ports 10a are arranged on the front and rear surfaces, three on each of the right and left sides, and are arranged in a pair at the bottom. . First gas burner 1 that heats liquid M1 to raise the temperature
1 and a heating pipe 12 are arranged at the bottom.

As shown in FIG. 2, a pump 13 for sucking the lower half liquid M1 of the first cleaning section 1 and supplying it to the upper half first cleaning pipe 8 via the supply system 15, and a first cleaning pipe 8
Is provided with a steam supply device 14 for supplying steam via a supply system 16. A pump 18 that sucks the liquid M1 in the lower half of the first cleaning unit 1 and supplies it to the third cleaning pipe 10 via a supply system 17, and supplies high-pressure compressed air to the third cleaning pipe 10 via a supply system 19. A compressor 20 is provided to feed the system 17. A blower 23 that supplies air at atmospheric pressure to the supply system 15 of the second cleaning pipe 9 and the first cleaning pipe 8 via the supply systems 21 and 22.
(Corresponding to an injection means).

A recovery tank 24 for recovering the liquid M1 overflowing from the lower half of the first washing section 1 is provided, and the oil floating on the liquid surface of the recovery tank 24 is recovered and put into a waste oil can 25. An apparatus 26 is provided. A pump 28 is provided which sucks the liquid M1 from the bottom of the lower half of the first washing unit 1 and the bottom of the recovery tank 24, and returns the liquid M1 to the lower half of the first washing unit 1 through a filter 27 and an oil / water separator (not shown). ing.

According to the above-described configuration, the first nozzle 1a of the first cleaning pipe 8 in the upper half of the first cleaning section 1
The liquid M1 (corresponding to the cleaning fluid) in the lower half of the cleaning unit 1 is jetted in a shower shape (the pump 13 and the supply system 15), and the steam (corresponding to the cleaning fluid) is jetted (the steam supply device 1).
4 and supply systems 15 and 16), and can inject air at atmospheric pressure (corresponding to the cleaning fluid) (blower 23).
And supply systems 15, 22). Liquid M in lower half of first cleaning unit 1
In 1, air at atmospheric pressure (corresponding to a cleaning fluid) is injected from the second cleaning pipe 9 (blower 23 and supply system 21), and liquid M1 (corresponding to the cleaning fluid) is supplied from the third cleaning pipe 10. Injection (pump 18 and supply system 17),
A micro jet jet (corresponding to a cleaning fluid) in which the liquid M1 and high-pressure compressed air are mixed can be jetted from the third cleaning pipe 10 (pump 18, compressor 20, and supply systems 17, 19).

An elevating device 29 (corresponding to elevating means) for the object to be cleaned W is provided in the first cleaning section 1. Fig. 6 (a)
As shown in (b) and FIG. 3, a bottom frame 31 in which the frame is assembled in a frame shape is swingably supported around a horizontal axis P1 of a main frame 30 in which the frame is assembled in a gate shape. Four air cylinders 32 for swinging the bottom frame 31 about the horizontal axis P1 with respect to the frame 30 are provided.

As shown in FIGS. 1, 3 and 5, four vertically oriented guide rails 34 are arranged in the first cleaning section 1, and the main frame 30 is provided with eight rollers 35.
The lifting device 29 is configured to be guided up and down by the guide rails 34 and the guide rail 34, and a pair of air cylinders 33 that operate the lifting device 29 to be moved up and down are connected to the main frame 30. As a result, the lifting device 29 is connected to the air cylinder 33
Thereby, the first position above the liquid M1 (see FIG. 3),
Then, the ascending / descending operation is performed over a second position (see FIG. 1) to be immersed in the liquid M1.

A guide portion 36 into which the transport device 4 shown in FIG. 1 enters and a roller 37 for supporting the article W to be cleaned are formed as shown in FIG.
(B) As shown in (b) and FIG. 3, a support frame 38 is provided on the bottom frame 31 of the elevating device 29 and supports the object W to be washed from both left and right sides so as not to fall down. ing. The guide portion 36 into which the transport device 4 enters and the roller 37 that supports the object to be cleaned W are also provided on the upper portion of the main frame 30.

(3) Next, the configuration of the second cleaning unit 2 will be described. Figure 1
As shown in FIGS. 2 and 7, the second cleaning unit 2 includes an upper cleaning chamber 39.
And a lower liquid tank 40. Cleaning room 3
Reference numeral 9 denotes a cylinder having a pressure-resistant structure formed in a cylindrical shape.
1 is provided on the first cleaning unit 1 side, and the lid 41 is configured to be able to move up and down by an air cylinder 62 and a pair of wires 63.

In the upper cleaning chamber 39, a large number of fourth cleaning pipes 42 each having a plurality of injection nozzles 42a are arranged on the ceiling and the left and right side walls. A heat retaining wall 43 is formed, and an injection pipe 57 provided with a large number of injection ports (not shown) at the bottom of the cleaning chamber 39.
A guide portion 44 into which the transport device 4 shown in FIG. 1 enters and a roller 45 for supporting the article W to be cleaned are provided.

As shown in FIG. 2, a liquid M2 for cleaning (a mixture of tap water and a small amount of a cleaning agent) is placed in a lower liquid tank 40.
Is filled, and a second gas burner 46 and a heating pipe 47 for heating the liquid M2 to increase the temperature are arranged at the bottom. A recovery tank 48 for recovering the liquid M2 overflowing from the liquid tank 40 is provided, and a recovery device 50 for recovering oil floating on the liquid surface of the recovery tank 48 and putting the collected oil into a waste oil can 49 is provided. The bottom of the liquid tank 40 and the collection tank 48
A pump 52 is provided for sucking the liquid M2 from the bottom of the tank and returning the liquid M2 to the liquid tank 40 through the filter 51.

A supply system 53 for supplying steam from the steam supply device 14 to the fourth cleaning pipe 42 of the cleaning chamber 39 is provided, and air at atmospheric pressure from the blower 23 is supplied to the supply system 56.
The liquid M2 in the liquid tank 40 is sucked and supplied to the supply system 53 via the supply system 54.
3 is provided. Wash water M3
Is provided, and a pump 66 for supplying the cleaning water M3 of the water tank 64 to the supply system 54 via the supply system 65 is provided.

The liquid M2 in the liquid tank 40 is sucked and supplied to the supply system 58.
, A pump 59 is provided for supplying the double heat retaining wall 43 of the cleaning chamber 39 via the air supply, and air at atmospheric pressure from the blower 23 is supplied to the injection pipe 57 at the bottom of the cleaning chamber 39 via the supply system 60. It is configured to be. A vacuum pump 61 (corresponding to a decompression unit) that sucks air from the upper part of the cleaning chamber 39 to decompress the inside of the cleaning chamber 39 is provided.

With the above configuration, in the cleaning chamber 39, the liquid tank 4 is moved from the injection nozzle 42a of the fourth cleaning pipe 42.
0 liquid M2 in the form of a shower (pump 55 and supply systems 53 and 54), or vapor from the injection nozzle 42a of the fourth cleaning pipe 42 (steam supply device 14 and supply system 53), and injection. Atmospheric pressure air can be injected from the pipe 57 (the blower 23 and the supply system 6).
0).

(4) In this cleaning apparatus, the object to be cleaned W is first cleaned in the first cleaning section 1 and then in the second cleaning section 2. Next, the flow of cleaning in the first cleaning unit 1 will be described. As shown in FIG. 3, the first door 6 of the first cleaning unit 1 is opened upward with the lifting device 29 of the first cleaning unit 1 raised to the first position above the liquid M1, The object W to be cleaned of the supply unit 3 is sent into the upper half of the first cleaning unit 1 by the transport device 4 and placed on the bottom frame 31 of the lifting device 29. Next, the transport device 4 returns to the supply unit 3, and the first door 6 is closed downward.

(4) -1 In the lifting device 29, as shown in FIG.
3, 4, 5 operation patterns A1, A2, A3, A4, A5
Are set. In the first operation pattern A1, with the bottom frame 31 (the cleaning object W) of the lifting device 29 fixed in a horizontal posture, the lifting device 29 (the cleaning object W) is fixed.
Is a first position above the liquid M1 and a second position immersed in the liquid M1.
The ascending and descending operation is automatically repeated at predetermined time intervals over the position. In the second operation pattern A2, in a state where the posture of the bottom frame 31 (the cleaning object W) of the lifting / lowering device 29 is fixed to a desired right or left inclination posture by the air cylinder 32 (see FIG. 6B), The elevating device 29 (the object to be cleaned W) is automatically and repeatedly moved up and down with a predetermined time interval between a first position above the liquid M1 and a second position immersed in the liquid M1.

In the third operation pattern A3, the lifting device 29
With the (cleaning target W) fixed at the first position above the liquid M1, the bottom frame 31 (the cleaning target W) of the elevating device 29 is tilted right and left by the air cylinder 32. , The rocking operation is automatically and repeatedly performed at a predetermined time interval. In the fourth operation pattern A4, the bottom frame 31 (the cleaning object W) of the lifting device 29 is fixed by the air cylinder 32 in a state where the lifting device 29 (the cleaning object W) is fixed at the second position immersed in the liquid M1. The swing operation is automatically repeated repeatedly at a predetermined time interval between the right tilt posture and the left tilt posture.

In the fifth operation pattern A5, the lifting device 29
(The cleaning object W) is at a first position above the liquid M1 and the liquid M1.
The lower frame 3 of the elevating device 29 is repeatedly moved up and down automatically at a predetermined time interval over the second position where it is immersed in the bottom device 3 with the elevating device 29 in the first and second positions.
1 (object W to be cleaned) is automatically and repeatedly swung by the air cylinder 32 between a right tilt posture and a left tilt posture after a predetermined time.

(4) -2 In the upper half of the first cleaning unit 1, the first
2, 3, 4, 5, 6, 7 injection patterns B1, B2, B
7, B4, B5, B6, and B7 are set. As shown in FIG. 9, in the first injection pattern B1, only the liquid M1 from the pump 13 is continuously injected from the first cleaning pipe 8. In the second injection pattern B2, only the steam from the steam supply device 14 is continuously injected from the first cleaning pipe 8. In the third injection pattern B3, the blower 23
From the first cleaning pipe 8 is continuously injected.

In the fourth injection pattern B4, the liquid M1 from the pump 13 and the vapor from the steam supply device 14 are automatically and repeatedly injected from the first cleaning pipe 8 alternately at predetermined intervals. In the fifth injection pattern B5, the steam from the steam supply device 14 and the air at the atmospheric pressure from the blower 23 are automatically and repeatedly injected from the first cleaning pipe 8 at predetermined intervals.

In the sixth spray pattern B6, the liquid M1 from the pump 13 and the air at atmospheric pressure from the blower 23 are automatically and repeatedly injected from the first cleaning pipe 8 at predetermined intervals. In the seventh spray pattern B7, the liquid M1 from the pump 13, the steam from the steam supply device 14, and the air at atmospheric pressure from the blower 23
It is automatically and repeatedly injected at predetermined time intervals after the injection.

(4) -3 In the lower half of the first cleaning unit 1, the first
2,3,4,5,6,7 injection pattern C1, C2, C
7, C4, C5, C6, and C7 are set. As shown in FIG. 10, in the first spray pattern C1, only air at atmospheric pressure from the blower 23 is
Is continuously injected from In the second ejection pattern C2, only the liquid M1 from the pump 18 is continuously ejected from the third cleaning pipe 10. In the third injection pattern C3, only the microjet jet obtained by mixing the liquid M1 from the pump 18 and the high-pressure compressed air from the compressor 20 is continuously injected from the third cleaning pipe 10.

In the fourth injection pattern C4, the blower 23
The atmospheric pressure air from the second cleaning pipe 9 is sprayed, and the liquid M1 from the pump 18 is supplied to the third cleaning pipe 1
The state of injection from 0 is automatically repeated at predetermined intervals alternately. In the fifth ejection pattern C5, the liquid M1 from the pump 18 and the micro jet jet (the pump 1
8 and the compressor 20) are automatically and repeatedly injected from the third cleaning pipe 10 at predetermined intervals.

The sixth jetting pattern C6 shows a state in which air at atmospheric pressure from the blower 23 is jetted from the second cleaning pipe 9, and a micro jet jet (pump 18 and compressor 20) is jetted from the third cleaning pipe 10. The state is automatically repeated at predetermined intervals alternately.
In the seventh injection pattern C7, a state in which air at atmospheric pressure from the blower 23 is injected from the second cleaning pipe 9, a state in which the liquid M1 from the pump 18 is injected from the third cleaning pipe 10, and a state in which the micro jet jet ( The state in which the pump 18 and the compressor 20) are injected from the third cleaning pipe 10 is automatically repeated at predetermined intervals alternately.

(4) -4 As described in (4) -1, 2, and 3 above, in the first cleaning section 1, the first to fifth operation patterns A1 to A5 are set in the elevating device 29, In the upper half of the first cleaning section 1,
Seventh ejection patterns B1 to B7 are set, and first to seventh ejection patterns C1 to C7 are set in the lower half of the first cleaning unit 1.

Thus, one of the first to fifth operation patterns A1 to A5 for the elevating device 29 is selected so as to be suitable for cleaning the object to be cleaned W according to the shape and type of the object to be cleaned W. One of the first to seventh spray patterns B1 to B7 for the upper half of the first cleaning unit 1 and the first cleaning unit 1
One of the first to seventh injection patterns C1 to C7 is selected for the lower half. In this case, when the third operation pattern A3 is selected as shown in FIG.
It is not necessary to select the seventh ejection patterns C1 to C7, and if the fourth operation pattern A4 is selected, there is no need to select the first to seventh ejection patterns B1 to B7 in the upper half. Therefore, a total of 161 combinations are selected.

For example, if the first operation pattern A1, the fourth injection pattern B4, and the fifth injection pattern C5 are selected, as shown in FIG. 8, the first operation pattern A1 causes the bottom frame 31 of the lifting / lowering device 29 to be cleaned. With the object W) fixed in a horizontal position, the lifting / lowering device 29 (the object to be cleaned W) is
The ascending and descending operation is automatically and repeatedly performed at a predetermined time interval between the first position above the position 1 and the second position immersed in the liquid M1. While the elevating device 29 (the object to be cleaned W) is stopped at the first position, the liquid M1 from the pump 13 and the vapor from the vapor supply device 14 are discharged by the fourth injection pattern B4.
It is automatically and repeatedly injected from the first cleaning pipe 8 to the object to be cleaned W at predetermined intervals. And
While the lifting / lowering device 29 (the cleaning object W) is stopped at the second position, the liquid M1 and the micro jet jet (the pump 18 and the compressor 20) from the pump 18 are subjected to the third cleaning by the fifth injection pattern C5. It is automatically and repeatedly ejected from the pipe 10 to the object to be cleaned W at predetermined intervals.

In this case, the temperature of the liquid M1 to be sprayed on the workpiece W in the upper half of the first cleaning unit 1 and the temperature of the liquid M1 for immersing the workpiece W in the lower half of the first cleaning unit 1 are changed. 2, the first gas burner 11 shown in FIG.
Can be set to an optimum temperature.

As shown in FIG. 8 for the lifting device 29,
When the first, second, fourth, and fifth operation patterns A1, A2, A4, and A5 other than the third operation pattern A3 are selected, the lifting / lowering device 29 (the cleaning object W) stops at the second position where the liquid M1 is immersed. Then, while the first to seventh spray patterns C1 to C7 for the lower half of the first cleaning unit 1 are performed, the first spray pattern B1 is performed in the upper half of the first cleaning unit 1. I have. As described above, while the object to be cleaned W is being washed while being immersed in the liquid M1, foaming on the liquid surface can be suppressed by applying the shower-like liquid M1 to the liquid surface. As a result, the oil removed from the object to be cleaned W easily gathers together without floating when it floats on the surface of the liquid. It is easy to flow to the collection tank 24 shown.

(5) When the cleaning of the object to be cleaned W in the first cleaning section 1 is completed as described above, the lifting device 29 is raised to the first position and stopped as shown in FIG. 1, the first and second doors 6 and 7 of the first cleaning unit 1 and the lid 41 of the cleaning chamber 39 of the second cleaning unit 2 are opened upward. Next, the transport device 4 that has been waiting in the supply unit 3 moves the cleaning unit 3 from the upper half of the first cleaning unit 1.
9, the cleaning object W supported by the elevating device 29 of the first cleaning unit 1 is sent from the first cleaning unit 1 to the cleaning chamber 39 of the second cleaning unit 2, and the transport device 4 is again supplied to the supply unit. 3, the lid 41 of the cleaning chamber 39 is closed downward.

(5) -1 When the object to be cleaned W is set in the cleaning chamber 39, FIG.
And the liquid tank 40 by the pump 55 as shown in FIG.
Is supplied to the fourth cleaning pipe 42 of the cleaning chamber 39, and the liquid M2 is supplied from the injection nozzle 42a to the object W to be cleaned.
Is being injected.

In this case, the liquid M2 in the liquid tank 40 is heated in advance by the second gas burner 46 (for example, 9
The high-temperature liquid M2 is sprayed onto the object W in the cleaning chamber 39, and the high-temperature liquid M2 is stored in the cleaning chamber 39. As described above, by storing the liquid M2 in the cleaning chamber 39 while spraying the high-temperature liquid M2 onto the cleaning target W, the oil attached to the cleaning target W can be reduced to some extent.

(5) -2 As shown in FIG. 11B, when the high-temperature liquid M2 is stored in the cleaning chamber 39 until the object to be cleaned W is completely immersed, the pump 55 is stopped and the vacuum pump 61 is stopped. Starts working. As a result, air in the space above the liquid M2 in the cleaning chamber 39 is discharged, and the pressure in this space is reduced to a predetermined low pressure or less (for example, about 33.3 to 40 kPa).

As described above, when the space above the liquid M2 in the cleaning chamber 39 is decompressed, the high-temperature liquid M2 in the cleaning chamber 39 starts to boil to generate fine cavitation bubbles, and the fine cavitation bubbles grow. . In this case, when the pressure in the space above the liquid M2 in the cleaning chamber 39 reaches the saturated vapor pressure at the temperature of the liquid M2 at that time, cavitation bubbles are generated even better. The generation and growth of such minute cavitation bubbles occur on the outer surface of the article W to be cleaned,
This occurs on all surfaces of the object W to be cleaned and all parts of the liquid M2, such as a portion that has entered the inside of the object W to be cleaned, such as a screw hole or an oil passage for a hydraulic circuit. Therefore, due to the generation, growth and rise of the above-mentioned minute cavitation bubbles to the liquid level, the oil adhering to the portion that has entered the inside of the object to be cleaned W is removed.

(5) -3 Next, as shown in FIG. 11 (c), air at atmospheric pressure is supplied from the blower 23 to the injection pipe 57 arranged below the cleaning chamber 39. In this manner, when the air at the atmospheric pressure is supplied to the lower side of the cleaning object W, the air at the atmospheric pressure becomes bubbles at the atmospheric pressure and moves upward from the lower side of the liquid M2 in the cleaning chamber 39. It reaches the space above the cleaning chamber 39. As a result, the object to be cleaned W is covered with atmospheric pressure bubbles, and the pressure of the liquid M2 around the object to be cleaned W is slightly recovered.

As described above, when the pressure of the liquid M2 around the object to be cleaned W is restored, the generated minute cavitation bubbles burst, and a large impact force is locally generated instantaneously due to the burst. . As a result, the oil adhering to the surface of the object to be cleaned W is further separated from the surface of the object to be cleaned W by the impact force due to the burst of the cavitation bubbles, and is finely crushed by the above-mentioned impact force so that the liquid M
2, and this oil is carried to the upper liquid level by its own buoyancy and atmospheric pressure bubbles moving upward.

The generation of an impact force due to the burst of one cavitation bubble is local and instantaneous. However, as described above, the cavitation bubble is continuously generated on all surfaces of the object to be cleaned W and all parts of the liquid M2. As it occurs,
The above-described impact force is continuously generated on all surfaces of the object to be cleaned W, and the oil adhering to all surfaces of the object to be cleaned W is further separated and crushed. The impact force due to the rupture of the cavitation bubbles is so strong that it is estimated to be several hundred atmospheres. Therefore, even if a high-viscosity oil adheres to the surface of the article to be cleaned W, the high-viscosity oil is also easily separated and crushed. It is.

As shown in FIG. 11C, while air at atmospheric pressure is supplied to the injection pipe 57 below the cleaning chamber 39, the pressure in the space above the cleaning chamber 39 is initially increased by the vacuum pump 61. Pressure slightly higher than the predetermined low pressure (for example, 75
１１112.5 kilopascals). As described above, while the air at the atmospheric pressure is supplied, FIG.
By maintaining the pressure slightly higher than the first predetermined low pressure shown in (b), the generation and growth of cavitation bubbles
The generation of an impact force due to the burst of the cavitation bubble is most actively performed.

(5) -4 When the cleaning by rupture of the cavitation bubbles is completed as described above, the liquid M2 is drained from the bottom of the cleaning chamber 39 as shown in FIG. It will be returned. Thereafter, when all the liquid M2 is drained from the cleaning chamber 39, the vapor from the steam supply device 14 is subjected to the fourth cleaning while the pressure in the cleaning chamber 39 is kept lower than the atmospheric pressure by the vacuum pump 61. The cleaning object W is injected through the pipe 42. Thereby, when the liquid surface descends along the cleaning object W as the liquid M2 is drawn from the cleaning chamber 39, even if the oil floating on the liquid surface adheres to the cleaning object W again. By re-injecting the steam as described above, the re-adhered oil is removed. By re-injecting the steam while the pressure in the cleaning chamber 39 is reduced, the re-adhered oil is well removed.

Next, as shown in FIG. 12 (b), the cleaning water M3 in the water tank 64 is discharged from the pump 66 while the pressure in the cleaning chamber 39 is maintained at a pressure lower than the atmospheric pressure by the vacuum pump 61. 4 It is sprayed onto the object to be cleaned W via the cleaning pipe 42. Thus, the finishing and cooling of the object to be cleaned W are performed, and the injected cleaning water M3 is drained without being stored in the cleaning chamber 39 and collected in the liquid tank 40.
It is replenished as a washing liquid M2.

(5) -5 When the finishing and cooling of the washing with the washing water M3 are completed,
As shown in FIG. 12C, the pressure in the cleaning chamber 39 is reduced from the state shown in FIG. 12A to a state close to a vacuum by the vacuum pump 61, whereby the object W to be cleaned is dried. Is performed. As described above, the first cleaning unit 1
The cleaning of the object to be cleaned W in the second cleaning unit 2 is terminated. When the cleaning is completed, the first cleaning unit 1 shown in FIG.
The second doors 6, 7 and the lid 41 of the second cleaning unit 2 (cleaning chamber 39) are opened upward, and the transport device 4 waiting in the supply unit 3 is moved to the first cleaning unit 1 (elevation device 29). ) And enters the cleaning chamber 39 of the second cleaning section 2. Then, the object W to be cleaned is transferred from the cleaning chamber 39 by the transfer device 4 to the first object.
It is returned to the supply unit 3 through the cleaning unit 1 (elevation device 29).

[First Alternative Embodiment] The step shown in FIG. 12A may be performed as shown in FIG. When the cleaning by bursting of the cavitation bubbles shown in FIG. 11 (c) is completed, the pressure in the cleaning chamber 39 is kept lower than the atmospheric pressure by the vacuum pump 61 as shown in FIG. The vapor from the vapor supply device 14 is simultaneously jetted to the object to be cleaned W via the fourth cleaning pipe 42 while the liquid M2 is being drawn from the liquid tank and returned to the lower liquid tank 40.

In the case where the liquid level is lowered along the object to be cleaned W as the liquid M2 is drawn from the cleaning chamber 39, the above item (5)
As described in -4, the oil component floating on the liquid surface may adhere to the object to be cleaned W again. In this case, in the step shown in FIG. 12A, steam is not injected until all the liquid M2 is drained from the cleaning chamber 39. Therefore, after all the liquid M2 is drained from the cleaning chamber 39, the oil W In this state, the oil is removed by injecting steam in a state where the oil is re-adhered, and it is conceivable that the oil re-adhered cannot be sufficiently removed.

On the other hand, in the step shown in FIG. 13, the vapor is injected at the same time as the liquid M2 is withdrawn from the cleaning chamber 39.
Therefore, when the liquid level descends along the object to be cleaned W,
Even if the oil floating on the liquid surface is re-adhering to the cleaning object W,
Since the steam is injected around the object to be cleaned W, re-adhesion of the oil to the object to be cleaned W is prevented beforehand. Then, even if the oil re-adheres to the article W to be cleaned, the oil is removed by the steam injected before the oil re-adheres sufficiently. When the steam is injected, the inside of the cleaning chamber 39 is removed as described above. By reducing the pressure, the re-adhesion of the oil can be further prevented by the injection of the steam. When the steam is injected after all the liquid M2 is removed from the cleaning chamber 39 as in the step shown in FIG. 12A, the time required for the step shown in FIG. In the process shown in FIG. 13, since the vapor is injected at the same time as the liquid M2 is drawn from the cleaning chamber 39, the time required for the process shown in FIG. 13 can be reduced.

[Second Alternative Embodiment] The steps shown in FIG. 11 (c) may be performed as shown in FIGS. 14 (a), (b) and (c). As shown in FIG.
When air at atmospheric pressure is supplied from the injection pipe 57 into the cleaning chamber 39 and the pressure of the liquid M2 around the cleaning target W is restored, a low pressure state in which cavitation bubbles are generated particularly in the lower part of the liquid M2 is maintained. In some cases, cavitation bubbles may be generated only in the upper layer of the liquid M2.

In such a case, air at atmospheric pressure is supplied from the injection pipe 57 into the cleaning chamber 39 with the object W to be cleaned completely immersed in the liquid M2 as shown in FIG. And cavitation bubbles are generated only in the upper part of the liquid M2. When the step shown in FIG. 14A is performed for a predetermined time, the supply of atmospheric pressure air from the vacuum pump 61 and the injection pipe 57 is once stopped as shown in FIG.
A little liquid M2 is withdrawn from the washing chamber 39 to lower the liquid level,
The decompression by the vacuum pump 61 and the supply of the air at the atmospheric pressure from the injection pipe 57 are resumed, and the cavitation bubbles are generated again only in the upper part of the liquid M2. When the process shown in FIG. 14B is performed for a predetermined time, the supply of atmospheric pressure air from the vacuum pump 61 and the injection pipe 57 is stopped again as shown in FIG. Further, the liquid M2 is further removed from 39, the liquid level is lowered, the pressure reduction by the vacuum pump 61 and the supply of the atmospheric pressure air from the injection pipe 57 are resumed, and the cavitation bubbles are generated again only at the upper part of the liquid M2. .

As described above, the upper layer of the liquid M2 in which the cavitation bubbles are generated is sequentially moved downward, so that the cleaning with the cavitation bubbles can be performed over the whole object W to be cleaned. In this case, FIG.
(B) After the end of each step shown in (b) and (c) (before the start of the next step), steam is injected as shown in FIG. 12 (a), or as shown in FIG. At the end of each step shown in (a), (b) and (c), by injecting steam while removing the liquid M2, the steps shown in FIGS. 12 (a) and 13 (b) and FIGS. Each step shown in (c) can be efficiently performed in parallel, and the overall time can be reduced.

The steps may be performed in the order shown in FIGS. 14 (C), (B) and (A) instead of the order shown in FIGS. In this case, at the start of each step shown in FIGS. 14 (c), (b), and (a), if the liquid M2 is injected and stored as shown in FIG. 11
The step shown in (a) and each of the steps shown in FIGS. 14 (c), (b), and (a) can be efficiently performed in parallel, and the overall time can be reduced.

[Third Alternative Embodiment] In the steps shown in FIGS. 14A, 14B and 14C, a pump (not shown) for sucking the liquid M2 from the bottom of the cleaning chamber 39 and returning it to the liquid tank 40 is provided. May be provided. With this configuration, when the process shown in FIG. 14A is shifted to the process shown in FIG. 14B, and when the process shown in FIG.
When the process shifts to the process shown in FIG. 4C, it is not necessary to stop the supply of the atmospheric pressure air from the vacuum pump 61 and the injection pipe 57, and the liquid level of the liquid M2 is changed while the cavitation bubbles are generated. Can be lowered. This allows the liquid M2 to be gradually and continuously drained while the cavitation bubbles are being generated from the step shown in FIG.

As described above, if the liquid level of the liquid M2 can be lowered in a state where cavitation bubbles are generated, the liquid level becomes lower as the liquid M2 is withdrawn as described in the above item (5) -4. It is expected that the state in which the floating oil reattaches to the object to be cleaned W will not occur due to the generation of cavitation bubbles. As a result, if the liquid level of the liquid M2 can be lowered in a state where the cavitation bubbles are generated, the step of injecting steam to the object W to be cleaned as shown in FIGS. But
Overall time can be reduced.

Fourth Embodiment In the configuration shown in FIG. 2, the second cleaning section 2 is provided with a second gas burner 46 for heating the liquid M2 and a heating pipe 47 in the liquid tank 40. A gas burner 46 and a heating pipe 47 may be provided in the cleaning chamber 39. In the configuration shown in FIG. 1, the cleaning object 39 is placed in the empty cleaning chamber 39 and then injected into the cleaning chamber 39 while spraying the liquid M2. Liquid M in 39
2 is set to a boiling state, and thereafter the washing room 3 is set.
The cleaning object W may be inserted from above the cover 9 and the lid may be closed.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an overall side view of a cleaning apparatus.

FIG. 2 is a circuit diagram showing a connection state of each part of the cleaning device.

FIG. 3 is a vertical front view of a first cleaning unit.

FIG. 4 is a plan view of a lower half of the first cleaning unit.

FIG. 5 is a cross-sectional plan view of the upper half of the first cleaning unit.

FIG. 6 is a perspective view showing an elevating device arranged in the first cleaning unit.

FIG. 7 is a front view of a second cleaning unit.

FIG. 8 is a diagram showing first to fifth operation patterns of the lifting device in the first cleaning unit.

FIG. 9 is a view showing first to seventh spray patterns of an upper half in a first cleaning unit.

FIG. 10 is a diagram showing first to seventh injection patterns of a lower half in a first cleaning unit.

FIG. 11 is a diagram showing a flow in the first half of cleaning of an object to be cleaned in a second cleaning unit.

FIG. 12 is a diagram showing a flow of the latter half of the cleaning of the object to be cleaned in the second cleaning unit.

FIG. 13 is a diagram showing a state in which the liquid is drained after the object to be cleaned is cleaned by the second cleaning unit in the first alternative embodiment.

FIG. 14 is a diagram showing a flow of cleaning an object to be cleaned by cavitation bubbles in a second cleaning section in a second alternative embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 1st washing | cleaning part 1A Liquid storage tank 2 2nd washing | cleaning part 8 Injection means of a 1st washing | cleaning part, 1st injection means 9,10 Injection means of a 1st washing | cleaning part, 2nd injection | emission means 14 Steam supply device 23,57 2 Injecting means of the cleaning section 29 Elevating means 39 of the first cleaning section 39 Cleaning chamber 61 Decompression means of the second cleaning section W Object to be cleaned M1 Liquid of the first cleaning section M2 Liquid of the second cleaning section

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hirotaka Tsubota 1-47, Shikitsuhigashi 1-chome, Namiwa-ku, Osaka-shi, Osaka (72) Inventor Masato Miyashita Masato Miyashita Higashi-ichi Shikitsu, Naniwa-ku, Osaka, Osaka No. 2-47, Kubota Co., Ltd. Examiner Masaki Suzuki (56) References JP-A-6-264274 (JP, A) JP-A-7-925 (JP, A) JP-A-7-290010 (JP, A) (58) Fields surveyed (Int. Cl. ⁷ , DB name) C23G 3/00 B08B 3/10

Claims (7)

(57) [Claims] An object to be cleaned (W) is converted into a cleaning liquid (M2).
Was immersed, the liquid (M2) by reducing the pressure of the upper space below a predetermined lower pressure than the boiling the liquid (M2)
In both cases, a pressure higher than the predetermined low pressure is set in the decompressed liquid (M2).
Then, the bubbles generated by the decompression are used for the recompression action of the injection air.
Therefore, a machine that injects air that has enough pressure to burst
How to wash machined products. 2. A cleaning solution (M2) is heated to about 90 ° C.
And the pressure in the space above the liquid (M2)
Is reduced to about 33.3 to 40 kPa,
(M2) is boiled , and atmospheric pressure air is supplied into the liquid (M2) that is boiling under reduced pressure.
During the supply of this air, the liquid is above the liquid (M2).
Pressure in the side space to about 75-112.5 kPa
The method for cleaning a machined product according to claim 1, wherein the machined product is maintained.
Law . 3. The cleaning liquid (M2) is stored and covered in the liquid.
A cleaning chamber (39) for immersing a cleaning object (W) therein;
The pressure in the space above (M2) is reduced to a predetermined low pressure or less.
Pressure reducing means (61) for boiling the liquid (M2)
A pressure higher than the predetermined low pressure in the liquid (M2);
Bubbles generated by decompression are broken by the recompression effect of the injected air
Injecting means for injecting air having a pressure sufficient to break it
(23), (57), and the decompression means (61) and the injection means (23), (5)
7) and the space above the liquid (M2) was depressurized.
Control to operate so that high-pressure air injection is performed in the state
Machine cleaning equipment provided with means . 4. A first cleaning section for cleaning an object to be cleaned (W).
(1) The object to be cleaned which has been cleaned in the first cleaning section (1)
And a second cleaning section (2) for further cleaning (W), wherein the first cleaning section (1) is provided for the object (W) to be cleaned.
With an ejection means (8) for ejecting a cleaning fluid
Then, the cleaning liquid (M2 ) is stored in the second cleaning section (2).
Cleaning chamber (3)
The apparatus for cleaning a machined product according to claim 3, further comprising (9) . 5. A liquid storage tank (1A) for storing a predetermined amount of liquid (M1) for immersing an object to be cleaned (W) in a first cleaning section (1); Jetting means (9) for jetting a cleaning fluid onto the object to be cleaned (W),
The apparatus for cleaning a machined product according to claim 4, further comprising (10). 6. A first cleaning section (1) for cleaning an object to be cleaned (W), a first position above a predetermined amount of liquid (M1) for immersing the object to be cleaned (W). An elevating means (29) capable of raising and lowering the object to be cleaned (W) over a second position to be immersed in the liquid (M1); and cleaning the object to be cleaned (W) at the first position. A first jetting means (8) for jetting a cleaning fluid, and second jetting means (9) and (10) for jetting a cleaning fluid to the object (W) at the second position. An apparatus for cleaning a machined product according to claim 4 or 5. 7. After the cleaning in the second cleaning section (2), in the cleaning chamber (39) from which the liquid (M2) in which the cleaning object (W) is immersed is drawn, the cleaning object (W) is removed. 3. A steam supply device (14) for injecting steam into the steam generator.
7. The apparatus for cleaning a machined product according to 4, 5, or 6.