JP2835559B2 - Work cleaning equipment - 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 device for removing foreign matter such as cutting chips, cutting oil and abrasives used in machining an article formed by machining or the like.

[0002]

2. Description of the Related Art Problems with a conventional cleaning apparatus disclosed in Japanese Patent Application Laid-Open No. 3-139832 (when a work is taken out of the cleaning tank after the work is cleaned in the cleaning tank, foreign matter mixed in the cleaning liquid is again applied to the work. As a cleaning apparatus for solving the problem of the possibility of adhesion and impairing the cleaning effect), a cleaning apparatus (Japanese Patent Application No. Hei 4-177623) is invented by the present applicant.
No.). Such a cleaning device includes a work support that fixedly attaches a work and imparts reciprocation of rotation and linear movement to the work, a cleaning tank in which a cleaning liquid is stored, and a cleaning liquid in an upper part of the cleaning tank. Means for discharging the cleaning liquid out of the cleaning tank, and the cleaning liquid in the storage tank, which is disposed in the lower cleaning liquid in the cleaning tank and is pressurized by the cleaning liquid pump, is sprayed toward the work disposed in the lower cleaning liquid. And an injection nozzle.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to further improve the effect of cleaning a workpiece (the efficiency of removing foreign substances adhering to the workpiece) in the above-described apparatus for cleaning a workpiece.

[0004]

According to the present invention, a cleaning tank in which a cleaning liquid is stored, a work disposed in the cleaning liquid in the cleaning tank, an opening in the cleaning liquid in the cleaning tank, and storage toward the work. An injection nozzle for injecting the cleaning liquid in the liquid tank, and a cleaning device for a workpiece that injects the cleaning liquid in the storage tank through the cleaning liquid in the cleaning tank toward the work from the injection nozzle,
The distance L between the opening end of the injection nozzle and the workpiece is set in a range of 5d to 20d with respect to the diameter d of the injection hole of the injection nozzle,
The diameter d of the injection hole and the diameter D of the work facing the injection hole of the work
Is achieved by setting the ratio (D / d) to 3 or more.

[0005]

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 a cleaning liquid pump 4 through a filter 3, and the cleaning liquid W is injected and supplied from an injection nozzle 5 opened in the cleaning tank 1. Reaches the liquid storage tank 2 through the overflow passage 6. Injection nozzle 5
FIG. 2 and FIG. 3 show the embodiment. The injection nozzle 5 is connected to the cleaning liquid injection path 5A (the cleaning liquid pump 4) on the left side in FIG.
The cleaning liquid W is pressurized and flows in, and the cleaning liquid W is injected into the cleaning tank 1 from an injection hole 5C opened at an opening end 5B formed on the right side. In addition, the embodiment of the injection nozzle 5 shown in FIG.
D is opened and the injection hole 5 connected 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 through the recess hole 5D. The injection nozzle 5 in FIG. 1 used the example shown in FIG. Reference numeral 7 denotes a workpiece to be cleaned, which is supported by a workpiece support 8. The portion of the workpiece 7 to be cleaned faces the injection hole 5 </ b> C of the injection nozzle 5, and the workpiece 7 is rotated or linearly moved by the workpiece support 8. Moved in the direction.

According to the above, the work 7 is supported by the work support 8.
And is disposed in the cleaning liquid W in the cleaning tank 1 so as to face the injection hole 5C of the injection nozzle 5, and is pressurized cleaning liquid injected from the injection hole 5C of the injection nozzle 5. W passes through the cleaning liquid W in the cleaning tank 1 and the work 7
, During which time cavitation bubbles are generated due to friction. This cavitation bubble is generated by the injection hole 5
C is destroyed at a certain distance from C to generate a large impact pressure, and foreign matter on the work 7 is completely removed by the impact pressure and the direct physical force of the sprayed cleaning liquid W. The foreign matter removed at the time of the washing flows upward along with the bubbles remaining after the cavitation action, and is discharged into the overflow passage 6 from the upper opening 1A of the washing tank 1. Thus, even when the work 7 is taken out of the cleaning tank 1 after a lapse of a predetermined time (for example, about 10 seconds), 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 performed various cleaning tests and found that the spray nozzle 5
The distance L between the opening end 5B and the workpiece 7, the diameter d of the injection hole 5C of the injection nozzle 5, and the ratio P of the diameter D facing the injection hole 5C of the work 7 are further appropriately selected. It has been found that a cleaning effect of a work can be obtained. First, it has been found that the distance L between the opening end 5B of the injection nozzle 5 and 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 cavitation is effective although the physical direct injection force of the cleaning liquid W injected from the injection hole 5C is large. It is difficult to use the function, and the work support 8
Therefore, it is necessary to strengthen the support of the work 7, which is not preferable from the viewpoint of the cleaning effect of the work 7 and the manufacturability of the apparatus. On the other hand, if the distance L is not less than 20d, the cavitation effect of the cleaning liquid W injected from the injection holes 5C tends to decrease and the size of the entire apparatus is undesirably increased.

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

(Equation 1) This test was performed under the following conditions. Injection hole 5
Cleaning liquid injection pressure injected from C toward work 7
14 kg / cm2 Distance L from the opening end 5B of the injection nozzle 5 to the work 7 L 10 d (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 when the diameter D of the workpiece 7 approaching 5C is changed, and this removal efficiency A is as follows.

(Equation 2) (The foreign matter removal length B is shown in FIG. 5) Such removal efficiency A
According to this, as the value increases, the foreign matter is effectively removed. FIG. 4 shows the results of the above test. According to FIG. 4, the diameter d of the injection hole 5C is 1.5 m.
m, 2 mm, or 2.5 mm, if P is less than 3, the foreign matter removal efficiency A sharply decreases.
From the above, it has been found that good removal of foreign substances can be performed. When the work 7 has a complicated shape, the work 7
Means the average diameter of the part of the work 7 facing 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 set to 5 d to 20 with respect to the diameter d of the injection hole of the injection nozzle.
By setting the ratio (D / d) of the diameter d of the injection hole to 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 can be reduced. It is possible to sufficiently utilize and thereby more effectively clean the work, and to compactly integrate the productivity of the cleaning device and the entire device.

[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 vertical sectional view showing a main part of an embodiment of an injection nozzle.

FIG. 3 is a vertical sectional view of a main part showing another embodiment of an injection nozzle.

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

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

[Explanation of symbols]

 5 Injection nozzle 5B Open end 5C Injection hole 7 Work d Injection hole diameter D Workpiece diameter

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-139832 (JP, A) JP-A-62-68195 (JP, A) JP-A-6-154713 (JP, A) 139832 (JP, A) JP-A 57-17783 (JP, U) JP-A 1-124280 (JP, U) JP-B 36-8240 (JP, B1) (58) Field surveyed (Int. ⁶ , DB name) B08B 3/00-3/14

Claims (1)

(57) [Claims] 1. A cleaning tank in which a cleaning liquid is stored, a work disposed in the cleaning liquid in the cleaning tank, and an injection nozzle which opens into the cleaning liquid in the cleaning tank and injects the cleaning liquid in the storage tank toward the work. In a work cleaning apparatus that sprays a cleaning liquid in a storage tank from a spray nozzle toward a work through a cleaning liquid in the cleaning tank, the distance L between the opening end 5B of the spray nozzle 5 and the work 7 is determined. The diameter d of the injection hole 5C of the injection nozzle 5
A workpiece cleaning device wherein 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.