JPS6227872B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to cleaning the inside of a blind hole after surface treatment of a member to be treated having a blind hole. Concerning improvements in methods.

Conventionally, in a method for removing residual liquid remaining in a blind hole of a workpiece having a blind hole, for example, as shown in FIG. For discharge, Figure 1b
As shown in the figure, a spray nozzle 4 is inserted into the blind hole 2, and air or cleaning water is sent out from the nozzle 4 by spraying to blow away the remaining processing liquid 3 in the direction of the entrance of the blind hole 2, or the treated member 1 Methods such as shaking strongly were used.

However, with this method, as shown in Figure 1c, the contaminated liquid scatters 6, and the residual liquid remaining in the blind hole 2 cannot be sufficiently discharged due to the surface tension in the blind hole 2. There was an inconvenience that continuous processing was difficult because cleaning was done one by one.

It is an object of the present invention to eliminate such drawbacks, and the purpose is to divide the interior of the blind hole into at least two chambers in cleaning such as after surface treatment of an article having a blind hole; A flow control plate whose other end has a predetermined inclination and is bent so as to form a gap between one end and the deepest part of the blind hole through which air or washing water supplied from one chamber is circulated to the other chamber. Installed horizontally to the axial direction of the blind hole,
This can be achieved by a method for cleaning residual liquid in a blind hole, characterized in that air or cleaning water supplied from one chamber formed in the blind hole is discharged from the other chamber to clean the inside of the blind hole. .

The main parts of an embodiment of the method for cleaning residual liquid in a blind hole according to the present invention will be explained below with reference to the sectional views in FIGS. 2a and 2b and the side view in FIG. 2c.

In the figure, 1 is a member to be treated having a blind hole 2;
3 is a treatment liquid, 5 is a spray having a nozzle 4, 7
is a flow control plate whose tip is bent into a dogleg shape, 8 is an upper chamber, and 9 is a lower chamber.

As illustrated in FIG.
A flow control plate 7 which is divided into 9 parts and whose tip is bent downward is provided, and the plate 7 is inserted into the blind hole 2, and air is blown to the entrance of the blind hole 2 by the nozzle 4, or cleaning water is sent out to the blind hole 2. The processing liquid 3 remaining inside the chamber 2 is caused to flow from the upper chamber 8 to the lower chamber 9 and is circulated to be discharged.

Thus, when the flow control plate 7 whose tip is bent downward is inserted into the blind hole 2 of the workpiece 1 as shown in FIG. The surface treatment liquid 3 moves from the upper chamber 8 to the lower chamber 9. That is, the member to be processed 1
In the method shown in FIG. 2a in which the surface treatment method is immersed and then pulled up, the surface treatment liquid 3 flows from the upper arrow direction of the blind hole 2 entrance of the upper chamber 8 to the upper side of the flow control plate 7. It flows in the direction of the arrow inside the blind hole 2 and is discharged from the entrance of the lower chamber 9 in the direction of the arrow.

In order to remove the processing liquid 3 remaining in the blind hole 2 of the workpiece 1 after this lifting, the tip of the flow control plate 7 at the entrance of the blind hole 2 of the upper chamber 8 is moved downward as shown in FIG. 2b. Aim the spray nozzle 4 at the blind hole 2 from above the bent hole, and when air is blown from the nozzle in the direction of the arrow or cleaning water is sent out, the remaining treatment liquid 3 flows inside the blind hole 2 in the direction of the arrow and downwards. The discharge is performed from the blind hole 2 entrance of the chamber 9 in the downward direction of the arrow.

Therefore, in the conventional method for cleaning the remaining treatment liquid 3 during surface treatment of the workpiece 1, since the flow control plate 7 of the present invention is bent downward at the tip, air or cleaning water flows into the upper part of the blind hole 2. It enters from the entrance of the chamber 8, flows into the chamber 9 below, and is delivered from the nozzle 4 of the spray 5 to the blind holes 2 throughout the workpiece 1, as shown in FIG. Surface treatment can be performed by automatically discharging the remaining treatment liquid 3.

Note that if the blind hole 2 is a normal drilled hole, no special device is required for one end (left side) of the flow control plate 7, but if the blind hole 2 is a reamed hole 10 as shown in FIG. As shown in FIG. 3b, one end (left side) of the flow control plate 12 is made with a notch 11 or the like to ensure the flow of the processing liquid 3, air, or cleaning water in the reamer hole 10. Then, the remaining processing liquid 3 can be discharged.

As explained above in the embodiments, according to the method for cleaning residual liquid in a blind hole according to the present invention, a flow control plate is provided for discharging the remaining residual liquid, and the residual liquid is automatically discharged at the end of the treatment process. Surface treatments such as plating, plating, and chemical formation can be carried out continuously, and if the workability is improved, the quality is also improved, which has a great effect.

[Brief explanation of the drawing]

Figure 1a is a cross-sectional view of the main part of a conventional blind hole of a member to be treated, Figures 1b and c are a cross-sectional view of the main part of the residual liquid removal method and a side view of the applied method, and Figure 2a is the present invention. Figure 2b is a cross-sectional view of the main part of the blind hole of the workpiece, Figure 2c is a side view of the method used, and Figures 3a and b are used for reamed holes. Figure 3 shows a side view as well as a top view of the flow control plate. In the figure, 1... member to be processed, 2... blind hole,
3...Residual processing liquid, 4...Nozzle, 5...Spray, 6...Scattering of contaminated liquid, 7, 12...Flow control plate, 8...Upper chamber, 9...Lower chamber, 10
... Reamer hole, 11 ... Notch is shown.

Claims (1)

[Claims] 1. When cleaning an item with a blind hole after surface treatment, etc., the inside of the blind hole is divided into at least two chambers, and the air or cleaning water supplied from one chamber is circulated to the other chamber. A flow control plate, the other end of which is bent at a predetermined inclination, is inserted horizontally to the axial direction of the blind hole so as to form a gap between one end and the deepest part of the blind hole. A method for cleaning residual liquid in a blind hole, characterized in that air or cleaning water supplied from one chamber formed in the blind hole is discharged from the other chamber to clean the inside of the blind hole.