JPH0725028B2 - Workpiece groove pattern processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is, for example, a mechanical seal made of silicon carbide, tungsten carbide, or the like, a bearing, or a shaft portion thereof. The present invention relates to a groove pattern processing method for a work, which is used for processing a large groove portion.

(B) Conventional Technology Conventionally, as the above-described groove pattern processing method, for example, a resist agent is directly screen-printed on a processed surface of a work, and then the resist agent is crosslinked (heated or ultraviolet-treated) to be cured, A method in which a work surface of a work is covered and protected by a film body, and only an exposed portion of the work excluding a portion covered by the film body is shot blasted to form a fine groove portion on the work surface of the work. See JP-A-63-235721 and JP-A-62-2783313).

(C) Problems to be Solved by the Invention However, when the resist agent is directly printed on the processed surface of the work as described above, the resist agent can be easily printed on the processed surface of the work formed in a planar shape. However, in the case of a work formed in a curved shape or an uneven surface shape, it is difficult to print the resist agent because there is a gap between the work surface of the work and the plate film, and print failure occurs only after printing. However, if printing failure occurs, the work must be performed from the beginning, and the printing work is troublesome.

Further, it is technically difficult to uniformly apply the resist agent to the processed surface of the work formed in the curved shape,
Moreover, there is a problem that not only a high technique is required for adjusting the brightness of ultraviolet rays used for exposure, but also it is difficult to manufacture an exposure mask corresponding to the processed surface shape.

In view of the above problems, the present invention, by transferring and adhering the film body formed on the transfer film to the processed surface of the work, it is possible to reliably transfer the film body corresponding to the processed surface shape of the work, An object of the present invention is to provide a groove pattern processing method for a work, which allows the transfer work of a film body to be performed simply and accurately.

(D) Means for Solving Problems The present invention is directed to screen printing a pattern opposite to a groove pattern to be processed on a work on the sticking surface side of a transfer film coated with a release agent with an ultraviolet curable adhesive coating. To form a film body, and after the film body of the transfer film is attached to the processed surface of the work, the film body is transferred to the work by ultraviolet treatment and cured while being adhered to the work, and only the transfer film is peeled off. Then, the film body is transferred and adhered to the processed surface of the work, the processed surface of the work is shot-blasted, and the film body transferred and adhered to the processed surface of the work is removed. Is characterized in that.

(E) Action and Effect of the Invention According to the present invention, since the film body formed on the transfer film is transferred and adhered to the processed surface of the work, the transfer film is flexibly deformed corresponding to the shape of the processed surface of the work. However, the film body can be reliably transferred not only to the planar shape but also to the processed surface of the work formed in the curved shape.

In addition, since the reverse pattern of the groove pattern to be processed on the work is once screen-printed on the transfer film, the printing state of the film body formed on the transfer film is inspected before the transfer to check the transfer failure of the film body. In addition to preventing it, the film body can be transferred easily and accurately without using a large-scale device, and the thickness adjustment and exposure adjustment of the resist agent in the conventional processing method are unnecessary, and the transfer operation of the film body is easy. Can be done.

Moreover, after the film body of the above-mentioned transfer film is adhered to the work surface of the work, the film body is cured by being transferred and adhered to the work by ultraviolet treatment, so that it is transferred to the work during the next shot blasting process. The groove pattern is not scraped, and the groove pattern is hardened once in this way, so that it is possible to form the groove with high precision in the superhard material.

(F) Embodiment One embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 7 show a first embodiment for processing a groove pattern on a ring-shaped work intended for a seal ring of a spiral groove type mechanical seal, and FIGS. 1 to 5 show the groove pattern processing method. Is a transfer film 1
A printing step of screen-printing the film body 2 on the sticking surface side of
It is composed of a transfer step of transferring and sticking the film body 2 formed on the transfer film 1 to the processed surface 3a of the work 3, and a processing step of shot blasting the processed surface 3a of the work 3.

First, in the printing process described above, as shown in FIG.
A transparent or semi-transparent transfer film 1 is formed of a synthetic resin such as polyester, and a release agent 4 is thinly and uniformly applied to the sticking surface side of the transfer film 1, and then the transfer film 1 is stuck. On the surface side, a pattern opposite to the groove pattern to be processed on the work 3 is screen-printed with an ultraviolet curable adhesive paint, and as shown in FIG. 7, a spiral pattern is formed on the sticking surface side of the transfer film 1. The film body 2 (black portion in the figure) is formed.

Next, in the transfer process, as shown in FIG. 2, silicon carbide (SiC) or tungsten carbide (W
Transfer film 1 on the processed surface 3a of the work 3 formed in C)
After positioning and adhering the film body 2 of 1., the film body 2 is cured by a UV treatment while being transferred and adhered to the work,
As shown in the figure, only the transfer film 1 is peeled off, and the film body 2 is transferred and attached to the processed surface 3a of the work 3.

After that, a crosslinking treatment (heating treatment or ultraviolet treatment) according to the characteristics of the film body 2 is performed, and the film body 2 is cured while being transferred and attached to the work 3.

Next, in the processing step, as shown in FIG. 4, the white part of the film body 2 transferred and adhered to the processed surface 3a of the work 3, that is, the part of the work 3 excluding the part covered by the film body 2 is processed. Blast particles 5 (made of SiC or Al ₂ O ₃ ) having a particle diameter corresponding to the groove depth to be processed are sprayed on the exposed portion for a predetermined time to perform shot blasting, and as shown in FIG. A fine groove 3b having a depth of 0.5 μm to 100 μm is processed on the processed surface 3a.

After that, as shown in FIG. 5, the work of working the work 3 is completed by dissolving and removing the film body 2 transferred and adhered to the working surface 3a of the work 3 with a solvent or the like.

FIG. 8 shows a machined surface on the outer peripheral side of the work 6 formed in a cylindrical shape.
A second embodiment of processing a groove pattern on 6a is shown, that is, as shown in FIG. 10, a striped film body 8 (black portion in the figure) formed on a transfer film 7 is used as a work 6
After attaching the film body 8 to the outer peripheral side processed surface 6a, peeling off only the transfer film 7 and transferring and attaching the film body 8 to the outer peripheral side processed surface 6a of the workpiece 6, the work excluding the portion covered by the film body 8 is removed. The outer peripheral side processed surface 6a of 6 is shot blasted to form a spiral groove pattern.

FIG. 9 shows the inner peripheral side machining surface of the workpiece 9 formed in a cylindrical shape.
9a shows a third embodiment in which a groove pattern is processed, that is, the film body 8 formed on the transfer film 7 is attached along the inner peripheral side processed surface 9a of the work 9, and the transfer film 7 is formed.
After peeling off only the film body 8 and transferring and adhering the film body 8 to the inner peripheral side processed surface 9a of the work 9, the inner peripheral side processed surface 9a of the work 9 is processed in the same manner as described above.
Is shot blasted to form a striped groove pattern.

Film bodies formed on transfer films 1 and 7 as in the above examples
Transferring 2 and 8 onto the processed surfaces 3a, 6a, and 9a of the works 3, 6, and 9, the transfer films 1 and 7 are flexibly deformed according to the shape of the processed surfaces of the works 3, 6, and 9. , A film body for the machined surfaces 3a, 6a, 9a of the workpieces 3, 6, 9 that are not only flat but also curved
2,8 can be reliably transferred.

Also, since the pattern opposite to the groove pattern processed on the works 3, 6, 9 is screen-printed on the transfer films 1, 7,
The printing condition of the film bodies 2 and 8 formed on the transfer films 1 and 7 is inspected before transfer to prevent transfer defects of the film bodies 2 and 8, and it is simple and accurate without using a large-scale device. On the membrane body 2,
8 can be transferred, the thickness adjustment and exposure adjustment of the resist agent in the conventional processing method are not required, and the transfer operation of the film bodies 2 and 8 can be easily performed.

Moreover, after the film body of the above-mentioned transfer film is adhered to the work surface of the work, the film body is cured by being transferred and adhered to the work by ultraviolet treatment, so that it is transferred to the work during the next shot blasting process. The groove pattern is not scraped, and the groove pattern is hardened once in this way, so that it is possible to form the groove with high precision in the superhard material.

The groove patterns processed on the works 3, 6, and 9 described above are not limited to spiral patterns and stripe patterns, and may be groove patterns such as cross patterns and honeycomb patterns.

[Brief description of drawings]

1 to 7 show a first embodiment of the present invention, FIG. 1 is a vertical sectional side view of a transfer film showing a printing process of a film body, and FIG. 2 is a work showing a film body attaching process. FIG. 3 is a vertical sectional side view of the work showing the transfer step of the film body, FIG. 4 is a vertical sectional side view of the work showing the processing step, and FIG. 5 is a vertical cross section of the work showing the film body removing step. FIG. 6 is a side view, FIG. 6 is an enlarged vertical side view of a groove portion processed in a work, FIG. 7 is a plan view of a transfer film showing a film body printed in a spiral pattern, and FIG. 8 is a film in a second embodiment. FIG. 9 is a transverse sectional view of the work showing the transfer step of the body, FIG. 9 is a transverse sectional view of the work showing the transfer step of the film body in the third embodiment, and FIG. 10 is a transfer showing the film body printed in a stripe pattern. It is a top view of a film. 1,7 ... Transfer film 2,8 ... Membrane body, 3,6,9 ... Work 3a, 6a, 9a ... Processed surface 3b ... Groove, 4 ... Release agent

Claims (1)

[Claims] 1. A film body is formed by screen-printing a pattern opposite to a groove pattern to be processed on a work with an ultraviolet-curable adhesive coating on the sticking surface side of a transfer film coated with a release agent. After the film body of the transfer film is adhered to the processed surface of the work, the film body is cured by being transferred and adhered to the work by ultraviolet treatment, and only the transfer film is peeled off to form the film body on the processed surface of the work. Is transferred and adhered, the processed surface of the work is shot blasted, and then the film body transferred and adhered to the processed surface of the work is removed.