JP3356228B2 - Method and apparatus for cleaning object to be treated - 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 for cleaning small objects to be processed and an apparatus applied to the method.

[0002]

2. Description of the Related Art In recent years, many proposals have been made on a method and an apparatus for cleaning an object to which oil has adhered without using a fluorocarbon solvent or trichloroethane which has environmental problems such as destruction of the ozone layer. .

One of the methods proposed in Japanese Patent Application Laid-Open No. 4-256472 is to heat an object to be processed at a temperature lower than the boiling point of oil and to remove a liquid having a boiling point lower than the heating temperature. The oil attached to the surface of the object is removed by spraying the object.

However, in such a cleaning method, although oil and the like that have just mechanically adhered to the surface of the object to be treated can be removed, oil and the like having a very high viscosity used for cooling during carburizing are used. Has a problem that it cannot be removed satisfactorily.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new cleaning method and a new cleaning method that can surely remove oil firmly adhered to small parts mainly subjected to a carburizing treatment.

[0006]

Means for Solving the Problems That is, the cleaning method for the present invention is to achieve such an object, while the holding means holding align the plurality of object to be processed in a given direction is rocked in the wash liquor , first wash for cleaning by ejecting a cleaning liquid toward the holding direction with respect to the object to be processed in the in the washing liquid
After the step and the washing in the washing solution, the holding means is
Lift up in the air and spray the cleaning liquid onto the object
A second washing step of washing with water and after the second washing step
Spray rust prevention and degreasing liquid on the object to be cleaned in air
And a step. Devices are suitable for this method, a holding means for holding align the plurality of the workpiece in a predetermined direction, the coercive
First and second cleaning tank disposed along the conveying path of lifting means, and lifting means for immersing said holding means to said first cleaning tank, the said holding means by said elevating means first
Immerse in the cleaning liquid contained in the cleaning tank 1 and oscillate
In this state, the cleaning liquid is discharged in the holding direction of the holding means.
The first liquid discharging means for discharging the liquid and the elevating means.
Lifting means above the cleaning liquid in the first cleaning tank
Second liquid discharging means for spraying the cleaning liquid in a state in which
Turning means for turning the holding means in the second washing tank; and a liquid for rust prevention and degreasing under the turning state of the holding means.
A third liquid ejection unit that sprays the object to be processed.
You.

[0007]

Embodiments of the present invention will be described below. FIG. 1 shows a cleaning apparatus according to an embodiment of the present invention.

This cleaning apparatus is roughly divided into a first cleaning tank 1
The first and second cleaning tanks 20 and the conveyors 30 for transporting the workpieces extending through the upper chambers 11 and 21 of the cleaning tanks 10 and 20, respectively.

Next, these will be further described. First and second cleaning tanks 10 and 20 are provided in upper chambers 11 and 2 respectively.
1 and lower chambers 12 and 22, and upper chamber 11 and
Reference numeral 21 is configured such that shutters 14, 24, 26 that are opened and closed by the respective opening / closing cylinders 13, 23, 25 close the loading / unloading port of the workpiece W.

In the first cleaning tank 10 described above, the object W to be processed carried in is immersed in an alkaline cleaning liquid, and the cleaning liquid is sprayed while oscillating them to perform cleaning. The object to be treated W is contained in the tank 10.
A basket 15 for supporting the pallets 31 together and transferring them to the lower chamber 12 is provided by a lifting cylinder 16 so as to be able to move up and down. Further, a washing liquid layer 19 communicating with the lower chamber 12 is separately provided on this layer 10. The cleaning liquid sent from there via the pump P is supplied to a nozzle 17 provided on one side of the upper chamber 11, and nozzles 18s, 18s, 18f provided on both sides of the lower chamber 12, front and rear, and below. , 18b, and 18u toward the workpiece W.

On the other hand, the second cleaning tank 20 is for subjecting the workpiece W, which has been cleaned in the first cleaning tank 10, to degreasing and rustproofing with a rustproofing and degreasing liquid. In the chamber 21, a basket 27 for holding the workpiece W together with the pallet 31 is arranged so as to rotate by being driven by an air motor 28. In the upper chamber 21, a large number of nozzles 29 are arranged. The liquid for rust prevention and degreasing sent from the lower chamber 22 via the pump P is sprayed on the side surface of the workpiece W.

2 and 3 show a pallet 31 for holding the workpiece W. The pallet 31 shown in FIG. 2 has a stud 33 erected on a lower frame 32 and gears and the like. The workpiece W is inserted and held vertically, and the pallet 31 shown in FIG. 3 inserts and holds the workpiece W such as a gear in a horizontal rail 34 fixed to a side frame. It is like that.

Next, a description will be given of a method of cleaning an object to be processed W using the apparatus configured as described above.

A large number of workpieces W #, such as gears, having been carburized, are held vertically on a pallet 31 as shown in FIG. When,
The first cleaning tank 10 operates the opening / closing cylinder 13,
The shutter 14 is opened to receive the workpiece W together with the pallet 31 into the upper chamber 11.

When the pallet 31 is fed into the basket 15 located in the upper chamber 11, the ascending and descending cylinder 16 then moves the basket 15 out of the washing liquid stored in the lower chamber 12. And the workpiece W is moved up and down at that position so as to float the workpiece W. At the same time, a control circuit (not shown) controls the solenoid valve V which communicates with the lower nozzle 18u.
0, the liquid in the cleaning liquid tank 19 is discharged from the lower nozzle 18u into the liquid in the lower chamber 12 by the pump P, and while the cleaning liquid is vigorously stirred, a part of the liquid is removed from the shaft hole and the outer periphery of the workpiece W. Along the surfaces, the oil attached firmly to these surfaces is reliably removed together with the swinging motion applied to the workpiece W.

After finishing the degreasing process for a required time in this way, the basket 15 is then raised to move the pallet 31 to the upper chamber 1.
1, and in this state, the electromagnetic valve V17 communicating with the upper chamber nozzle 17 is opened, and the alkaline liquid from the nozzle 17 is sprayed on the workpiece W, so that the liquid on the liquid surface adhering to the surface when ascending is lifted. Rinse floating oil.

After the above processing is completed, the boundary shutter 24 is opened to send the pallet 31 into the adjacent second cleaning tank 20, where the pallet 31 is rotated by the air motor 28 while the pallet 31 is rotated. A rust prevention and degreasing liquid is sprayed on the workpiece W from a nozzle 29 provided on one side,
After the required degreasing treatment and rust-prevention treatment, they are sent out of the tank 20.

By the way, the cleaning operation for the workpiece W held vertically has been described above.
In the case where a large number of workpieces W are held horizontally as shown in FIG. 3, the workpiece W is vertically rocked by the lifting / lowering cylinder 16 and provided on the workpiece W. Left and right nozzles 18S, 18S facing in the axial direction of the hole
, An alkaline solution is strongly ejected from the substrate, and the workpiece W may be washed using the strong jet.

[0019]

As described above, according to the present invention, the object to be processed is washed with the cleaning liquid discharged in the holding direction while the holding means for holding the object to be processed aligned in a certain direction is swung in the cleaning liquid. Since cleaning is performed, a strong jet of the cleaning liquid is applied to the shaft hole and the surface of the small object, while the small object is released from the holding means by rocking applied to the object, and these parts are firmly fixed. It is possible to reliably remove the oil attached to the surface.

In addition, after completion of the cleaning process, it is used for rust prevention and degreasing.
To maintain the degreasing and cleaning conditions.
It is possible that.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an apparatus showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a pallet for vertically holding an object to be processed.

FIG. 3 is a perspective view showing a pallet for holding a workpiece horizontally.

[Explanation of symbols]

 Reference Signs List 10 First cleaning tank 11 Upper chamber 12 Lower chamber 16 Cylinder for elevating 17, 18 Nozzle 19 Cleaning liquid tank 20 Second cleaning tank 21 Upper chamber 22 Lower chamber 28 Rotating motor 29 Nozzle 31 Pallet W Workpiece

Claims (2)

(57) [Claims] 1. A cleaning device according to claim 1, wherein said holding means, which holds a plurality of workpieces aligned in a predetermined direction, is swung in the cleaning liquid, and the cleaning liquid is discharged toward the processing object in the cleaning liquid in the holding direction. A first cleaning step of cleaning, after the cleaning in the cleaning liquid, a second cleaning step of raising the holding means to the atmosphere and spraying the cleaning liquid on the object to be cleaned, and a second cleaning step Spraying a liquid for rust prevention and degreasing on the object to be cleaned in the air after the step (c) is completed. 2. A holding means for holding a plurality of objects to be processed in a fixed direction, first and second cleaning tanks arranged along the transport path, and the holding means comprising: Elevating means for dipping in the first cleaning tank; and dipping the holding liquid in the cleaning liquid contained in the first cleaning tank by the elevating means, and oscillating the cleaning liquid in a state where the holding means is swung. First liquid discharging means for discharging in the holding direction, second liquid discharging means for spraying the cleaning liquid in a state where the holding means is pulled up above the cleaning liquid in the first cleaning tank by the elevating means, and Turning means for turning the means in the second cleaning tank, and third liquid discharging means for spraying a liquid for rust prevention and degreasing on the object under rotation of the holding means. Cleaning equipment for processing objects.