JPH06134414A - Washing device for work - Google Patents

Abstract

PURPOSE:To more effectively wash a work, in a work washing device wherein the washing soln. in a washing tank is injected to the work immersed in the washing tank from a jet nozzle to wash the work, by specifying the distance between the jet orifice of the jet nozzle and the work. CONSTITUTION:A jet nozzle 5 is provided to one side surface of a washing tank 1 having a washing soln. W received therein and the washing soln. in a storage tank 2 is sucked through a filter 3 by operating a washing soln. pump 4 to be supplied to the jet nozzle 5 under pressure and injected to the work 7 immersed in the washing soln. W from the jet orifice 5C of the jet nozzle 5 to wash the work 7. In this case, when the diameter of the jet orifice 5C is set to (d), the distance between the orifice end part 5B of the jet nozzle 5 and the work 7 is set to 5d-20d and the ratio P of the diameter (d) of the jet orifice and the diameter D of the work 7 is set to 3 or more. By this constitution, the energy of the cavitation of the washing soln. injected into the washing soln. is effectively used to enhance washing capacity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing foreign matter such as cutting chips, cutting oil used during processing, abrasives and the like during processing of articles formed by mechanical processing or the like.

[0002]

2. Description of the Related Art Problems of the conventional cleaning device disclosed in Japanese Patent Laid-Open No. 3-139832 (When removing a work from the cleaning tank after cleaning the work in the cleaning tank, foreign matter mixed in the cleaning liquid is re-applied to the work. A cleaning device according to the invention of the applicant of the present application as a cleaning device that solves the possibility of adhesion and impairs the cleaning effect (Japanese Patent Application No. 4-177623).
No.). Such a cleaning device is such that a work is fixedly attached to the work, a work support that gives rotation and linear reciprocating motion to the work, a cleaning tank in which the cleaning liquid is stored, and a cleaning liquid at an upper part of the cleaning tank are provided. And an overflow means for discharging the cleaning liquid to the outside of the cleaning tank, and the cleaning liquid in the storage tank, which is arranged in the lower cleaning liquid in the cleaning tank and is pressurized by the cleaning liquid pump, is jetted toward the workpiece arranged in the lower cleaning liquid. And an injection nozzle.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to further enhance the work cleaning effect (removal efficiency of foreign matter adhering to the work) in the work cleaning device.

[0004]

According to the present invention, a cleaning tank in which a cleaning liquid is stored, a work arranged in the cleaning liquid in the cleaning tank, and an opening in the cleaning liquid in the cleaning tank are stored toward the work. A cleaning device for a work, comprising: a spray nozzle for spraying the cleaning liquid in the liquid tank, and spraying the cleaning liquid in the storage tank through the cleaning liquid in the cleaning tank toward the work from the spray nozzle,
The distance L between the opening end of the injection nozzle and the work is set within the range of 5d to 20d with respect to the diameter d of the injection hole of the injection nozzle,
Diameter d of the injection hole and diameter D of the work facing the injection hole of the work
It is achieved by setting the ratio (D / d) to 3 or more.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. Reference numeral 1 denotes a bottomed cleaning tank capable of storing the cleaning liquid W therein, and the cleaning liquid W in the liquid storage tank 2 is supplied and stored therein. The cleaning liquid W in the liquid storage tank 2 is pressurized by the cleaning liquid pump 4 through the filter 3, and the cleaning liquid W is jetted and supplied from the jet nozzle 5 opening in the cleaning bath 1, while the upper portion of the cleaning bath 1 is provided. The cleaning liquid W which has reached the above position flows back into the liquid storage tank 2 through the overflow passage 6. Injection nozzle 5
The embodiment is shown in FIGS. 2 and 3. The injection nozzle 5 is a cleaning liquid injection passage 5A (cleaning liquid pump 4 on the left side in FIG. 2).
Cleaning liquid W is pressurized and flows in, and the cleaning liquid W is sprayed into the cleaning tank 1 through a spray hole 5C opening at an opening end 5B formed on the right side. In addition, in the embodiment of the injection nozzle 5 shown in FIG.
An injection hole 5 which is open at D and extends to the cleaning liquid injection path 5A
C is opened in the recess hole 5D. That is, the opening end 5B of the injection nozzle 5 may be opened in the cleaning tank 2, and the opening of the injection hole 5C into the cleaning tank 1 may be opened via the recess hole 5D. The injection nozzle 5 in FIG. 1 used the example shown in FIG. Reference numeral 7 denotes a work to be cleaned, which is supported by a work support 8, and the portion of the work 7 to be cleaned faces the injection hole 5C of the injection nozzle 5 and the work 7 is rotated or linearly moved by the work support 8. Is moved in the direction.

According to the above, the work 7 is the work support 8
Which is supported in the cleaning liquid W in the cleaning tank 1 and is arranged to face the injection hole 5C of the injection nozzle 5 and is pressurized from the injection hole 5C of the injection nozzle 5. W passes through the cleaning liquid W in the cleaning tank 1 and the workpiece 7
Cavitation bubbles are generated due to friction during this period. This cavitation bubble is generated by the injection hole 5
It is destroyed at a constant distance from C to generate a large impact pressure, and the foreign substances on the work 7 are completely removed by this impact pressure and the physical direct force of the sprayed cleaning liquid W. The foreign matter removed during the cleaning is directed to flow upward in the cleaning liquid W together with the bubbles remaining after the cavitation action, and is discharged into the overflow passage 6 from the upper opening 1A of the cleaning tank 1. Therefore, even when the work 7 is taken out from the cleaning tank 1 after a certain time (for example, about 10 seconds) has passed, the work 7 is less likely to pass through the cleaning liquid W containing foreign matters, so that good work cleaning can be performed. did it.

In the above cleaning apparatus, the inventor of the present invention conducted various cleaning tests, and as a result, the injection nozzle 5
Is further improved by appropriately selecting the ratio L of the distance L from the opening end 5B of the workpiece 7 to the workpiece 7, the diameter d of the jet hole 5C of the jet nozzle 5 and the diameter D of the workpiece 7 facing the jet hole 5C. It has been found that a cleaning effect for a different work can be obtained. First, it has been found that the distance L from the opening end 5B of the jet nozzle 5 to the work 7 is preferably in the range of 5d to 20d. (D is the diameter of the injection hole 5C of the injection nozzle 5.) That is, when the distance L is less than 5d, the physical direct injection force of the cleaning liquid W injected from the injection hole 5C is large but effective cavitation. It is difficult to use the action and the work support 8 is used to receive the strong direct spray of the cleaning liquid W.
It is necessary to strengthen the support of the work 7 by the above method, which is not preferable from the viewpoint of the cleaning effect of the work 7 and the manufacturability of the apparatus. If the distance L is 20 d or more, the cavitation action of the cleaning liquid W sprayed from the spray holes 5C tends to decrease, and the size of the entire apparatus becomes large, which is not preferable.

On the other hand, the diameter d of the injection hole 5C of the injection nozzle 5
It is desirable that the ratio P between the diameter D of the work 7 and the diameter D of the work 7 facing the injection hole 5C of the work 7 is 3 or more.

[Equation 1] This test was conducted under the following conditions. Injection hole 5
Cleaning liquid spray pressure sprayed from C toward the workpiece 7
14 kg / cm2 Distance L from the open end 5B of the injection nozzle 5 to the work 7 ... 10d (d = diameter of the injection hole 5C of the injection nozzle 5) Under such conditions, the diameter d of the injection hole 5C and the injection hole The removal efficiency is obtained when the diameter D of the workpiece 7 facing 5C is changed, and the removal efficiency A is as follows.

[Equation 2] (Foreign matter removal length B is shown in FIG. 5) Such removal efficiency A
According to the above, the foreign matter is effectively removed as the value increases. The result of the above test is shown in FIG. According to FIG. 4, the diameter d of the injection hole 5C is 1.5 m.
When P is less than 3, the removal efficiency A of the foreign matter sharply decreases regardless of m, 2 mm or 2.5 mm, and P is 3
From the above, it was found that excellent foreign matter can be removed. If the work 7 has a complicated shape, the work 7
The average diameter of the part of the work 7 that faces the injection hole 5C.

[0009]

As described above, according to the work cleaning apparatus of the present invention, the distance L between the opening end of the injection nozzle and the work is 5d to 20 with respect to the diameter d of the injection hole of the injection nozzle.
By setting the range of d to be 3 and the ratio (D / d) of the diameter d of the injection hole and the diameter D of the work facing the injection hole of the work to be 3 or more, the energy of the cavitation of the cleaning liquid injected into the cleaning liquid is set. It is possible to make full use of the cleaning device, more effectively clean the work, and make the cleaning device manufacturable and the entire device compact.

[Brief description of drawings]

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

FIG. 2 is a longitudinal sectional view of an essential part showing an embodiment of an injection nozzle.

FIG. 3 is a longitudinal sectional view of a main part showing another embodiment of the injection nozzle.

FIG. 4 is a diagram showing a relationship between (D / d) and removal efficiency.

FIG. 5 is an explanatory diagram showing a work and a removal length B of a foreign substance by cleaning.

[Explanation of symbols]

 5 injection nozzle 5B open end 5C injection hole 7 work d injection hole diameter D work diameter

Claims (1)

[Claims] 1. A cleaning tank in which the cleaning liquid is stored, a work arranged in the cleaning liquid of the cleaning tank, an injection nozzle which is opened in the cleaning liquid of the cleaning tank and injects the cleaning liquid in the liquid storage tank toward the work. In the work cleaning device for spraying the cleaning liquid in the storage tank from the spray nozzle toward the workpiece through the cleaning liquid in the cleaning tank, the distance L between the opening end 5B of the spray nozzle 5 and the workpiece 7 is , Diameter d of the injection hole 5C of the injection nozzle 5
To 5d to 20d, and the ratio (D / d) of the diameter d of the injection hole 5C to the diameter D of the work 7 facing the injection hole 5C of the work 7 is 3 or more.