WO1980001257A1

WO1980001257A1 - Method and device for machining inner surface of molded cylindrical article

Info

Publication number: WO1980001257A1
Application number: PCT/JP1979/000319
Authority: WO
Inventors: K Takeshita; T Amakasu; M Miyagaki; M Nakaishi; K Ugata
Original assignee: Kubota Ltd; K Takeshita; T Amakasu; M Miyagaki; M Nakaishi; K Ugata
Priority date: 1978-12-19
Filing date: 1979-12-19
Publication date: 1980-06-26
Also published as: EP0028653A4; NL178945B; DE2953434C2; BR7908953A; SU1269735A3; NL178945C; NL7920183A; EP0028653B1; EP0028653A1; GB2048743A; DE2953434A1; GB2048743B; JPS5584265A

Abstract

Method and device for pressurizing the inner surface of a molded cylindrical article by the step of pressurizing and forming the inner surface of the article while rotating a pressing unit (6a) of pressurizing means (6) relative to a molded article (2) during a period of time which begins immediately after completion of solidification of the article ready for pressurizing and forming, and which continues until the transition temperature of the article has been reached the temperature at which the tensile strength and elongation of the article undergo an abrupt charge. This is performed in order to pressurize and cause the collapse of blowholes and air bubbles in the molded article, and to harden the inner surface thereof.

Description

. Specification

Inner surface processing method and apparatus for cylindrical shaped products

Technical field

The present invention relates to a method and an apparatus for processing the inner surface of a cylindrical structure, which is formed by pressurizing the inner surface of the cylindrical structure in a predetermined temperature range.

Background technology

Cylindrical structures are generally manufactured by a centrifugal method or a method using a core. According to such a method, it is known that shrinkage cavities and air bubbles are generated on the inner surface of the 10-cylinder structure when the structure is cooled. It has been found that these shrinkage cavities and bubbles reduce the strength and airtightness of the tubular structure.

Conventionally, in order to eliminate the above-mentioned drawbacks, when manufacturing a cylindrical recording product by the centrifugal manufacturing method, hot water is poured into a centrifugal recording mold and before the solidification of the hot water is completed. Meanwhile, a method has been proposed in which the inner surface of the cylinder is pressurized using a roller or the like to press and close shrinkage cavities and bubbles.

On the other hand, when a tubular structure is used for a fluid transport pipe, not only the strength and airtightness of the pipe itself are excellent, but also the hardness of the inner surface of the pipe is increased and the wear resistance is increased. It was necessary to make a product with excellent corrosion resistance and a tube inner surface with low fluid resistance.

However, it breaks the conventional shrinkage cavities and air bubbles and destroys them.

O PI According to this method, since the inner surface of the cylinder is pressurized in a softened state before the solidification of the hot water, the inner surface of the cylinder cannot be hardened even if shrinkage cavities and bubbles can be crushed. Was.

On the other hand, the so-called cold working method of pressing the surface at room temperature 5 with the purpose of hardening the surface of the product is widely practiced on a single boat. However, if a shrinkage cavity or air bubbles are crushed at the same time by such a method, a device that generates a very large pressure is required, and by applying such a large pressure, a cylinder is required. Since there are 10 missing D points that caused distortion, such a method has been implemented.

Disclosure of the invention

The present invention has been made in view of the above-described limitations of the related art, and has as its object to provide a method for processing the inner surface of a tubular structure and an apparatus for satisfying two conflicting requirements.

In order to achieve this object, a method for processing the inner surface of a cylindrical product according to the present invention includes the steps of: providing a pressurizing section of a pressurizing means in a hollow portion of the cylindrical product formed by embedding; The pressurizing unit and the pressurizing unit are rotated relative to each other within a temperature range 20 from immediately after the solidification of the cylindrical product to the transition temperature. Thus, the inner surface of the tubular structure is pressure-formed.

The inventor of the present invention has found that the mechanical properties of general metals, especially the “elongation” for facilitating the processing, suddenly improve above the transition temperature.

O PI WIPO -Focusing on the point and, even immediately after solidification of the metal, an experiment was conducted to increase the hardness of the machined surface by pressing and shaping the surface of the metal while rotating the metal and the pressing member relative to each other. I confirmed it. The transition temperature in the present invention refers to a temperature at which the mechanical properties 5 (tensile strength and elongation) suddenly change.

As described above, the present invention makes it possible to simultaneously perform the close contact of the shrinkage cavities and bubbles and the surface hardening treatment of the inner surface of the tubular product, which were conventionally considered to be different work processes. It is said that.

10mm], in a temperature range where pressure molding is easy

While pressing the shrinkage cavities and air bubbles on the inner surface of the cylindrical mirror product with the applied pressure, the inner surface of the cylindrical mirror product is press-formed while the relative rotation between the cylindrical mirror product and the pressurizing unit is performed. Thus, hardening of the inner surface of the cylindrical structure to be pressure-formed could be performed at a stroke without causing almost any distortion in the cylindrical structure.

As a result, the metal structure density near the inner surface of the tubular structure is increased and uniformized, and the strength and airtightness of the entire tubular structure are increased, and the inner surface is hardened. Cylindrical type with excellent wear and corrosion resistance, yet low resistance in fluid transport

20__ I was able to get a product.

Therefore, further improvement in quality is required in the future. For example, one member of a fluid pressure cylinder, a part of a cylinder of an internal heat engine, various steel pipes, vacuum vessel members and various rollers Pipes for nuclear power generation, high strength aluminum alloys, steel pipes, etc.

OMPI One V / IPO ~ " It is said to have a remarkably great industrial value in the production of various cylindrical shaped products.

Another object of the present invention is to provide an apparatus for processing an inner surface of a cylindrical structure for performing the above-described method.

In order to achieve a powerful purpose, the inner surface machining apparatus for a cylindrical product of the present invention can pressurize the inner surface of the cylindrical product from immediately after solidification to a transition temperature. It is characterized by comprising a pressurizing unit having a pressurizing unit formed in this way, and a driving unit for relatively rotating the cylindrical structure and the pressurizing unit stage.

During the period between the completion of solidification of the tubular structure and the transition temperature to the transition temperature, the inner surface of the tubular structure is pressed by the pressurizing section while the pressurizing section and the cylindrical section are pressed. Since the inner surface is applied by rotating the product and the relative motion by the driving means, shrinkage cavities and bubbles generated in the cylindrical product are crushed, and the thickness of the cylindrical product is increased. It was possible to increase the density of the metal structure in the direction and harden the inner surface.

As a result, it has been possible to provide a tubular structure excellent in the strength of the entire tubular structure, the abrasion resistance of the inner surface thereof, and the corrosion resistance.

In addition, air bubbles and shrinkage cavities on the inner surface of the cylindrical structure are crushed, and the density of the metal structure in the thickness direction is increased. When this structure is used as a member requiring airtightness, such as a vacuum vessel member, there is an advantage that extremely good airtightness is exhibited.

R £ A

OMPI WIPO Other objects and advantages of the present invention will become apparent from the following description.

Description of drawings

The drawings illustrate the best mode of a method and an apparatus for processing the inner surface of a cylindrical shaped product according to the present invention.

Is a vertical section of a centrifugal machine and a cylindrical structure.

Overall schematic side view of the inner surface processing device of

g 2 is the 加圧 — Π arrow pressurization in S

Enlarged end view of the means,

I ¹ ig · 3 is an enlarged partial cross-sectional side view of the main part of the pressurizing means

Figure,

FIG. 4 shows the state processed by the method of the present invention and the unprocessed state.

A cross-sectional photograph of an aluminum alloy tubular structure showing the condition and

FIG. 5 shows the circular cross section to which the method of the present invention is applied.

A longitudinal side view showing the cylindrical product;

6 is an end view of F i g.

And

FIG. 7 shows a cross section of a different diameter to which the method of the present invention is applied.

FIG. 2 is a longitudinal sectional side view showing a tubular product having the same.

OMPI

One BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

Fig. L shows a schematic vertical sectional view of the main part of a centrifugal mirror machine and the inner surface of a cylindrical structure. In this embodiment, the tubular structure is formed by the centrifugal method and the apparatus, but may be formed by another method.

(1) shows a mold for making a centrifugal mirror, and ( ² ) shows a cylindrical structure built in the mold (1). This cylindrical '錡造article) includes Ri 10 shown in. Mails, whereas the end portion. ⁷ La Nji a (2a). ) Is a drive port for supporting the mold (1) and rotating the mold (1). These drive rollers are connected to the electric motor ( ⁴ ) via appropriate means, and the drive means ( ⁵ ) is provided with these two members and the mold (1). It is composed. However, if a cylindrical structure is to be obtained by a method other than telescope manufacturing, a drive configuration may be used instead of the drive port-a).

5 o

(6) is a heating means, which applies a heating force of the heating part (6a) inserted into the hollow part of the cylindrical structure () and the heating part (6a) to 20. A moving device (6b) for moving the force generating portion (6b) to be generated, and the pressing force generating portion (6b) and the E portion (6a) along the axis of the cylindrical structure (2). 6c).

The moving device (6c) includes a hydraulic cylinder fixed at a fixed position) and a known oil EE pump system that supplies oil E to the hydraulic cylinder. (Not shown), and the piston rod of the oil E cylinder) is connected to the main body of the pressing force generating section (6b). The force-applying force generating portion (6b) includes a support (10) that supports the force-applying portion (6a), an oil-E cylinder ( ⁹ ), and a piston rod (11) (FIG. 3) and an oil pump system (not shown) that drives this oil cylinder ( ⁹ ).

The pressing force generating section (6b) is configured to be able to travel on the rail (on which the moving force generating section (6b) operates. The E-portion (6a) can be moved smoothly in the direction of the axis of the cylindrical mirror product by means of the f-portion, so that O can be moved smoothly.

The support (10) extends from a machine frame of the applied force generating section (6b) to support the heating section (6a). The piston rod (11) extends through the support (10) toward the heating portion (6a) so as to be able to advance and retreat, and a taper portion is provided at a tip end thereof. (11a) is formed. (1 is a J-port opening, which is equally spaced in the circumferential direction of the E-portion (6a), and each is an axis of the piston rod (11). It is arranged so that it has a rotation axis parallel to the core, and if there is at least / a number of additional E ports, the purpose of the BE forming can be achieved.

In Fig. 3, in order to make the drawing easy and easy to see, the distance between the individual E-rollers (1 is shortened. '(18) is a guide member. One end is attached to the tip of the pressurizing section (6a) by a nut, and the other end is the taper section.

OViPI leg _ It is inserted into the hole drilled in (11a) and serves as a guide when the taper section (11a) is operated forward and backward.

The above-mentioned opening-and-roller & ¾ is attached to each holding member ^ so as to be freely rotatable on a support shaft fixed thereto. Each holding member ³ ) holds the body of the additional portion (6 a) so as to be able to slide in the radial direction of the piston rod (11) or the cylindrical structure. In addition, a cam surface (13a) is formed on the axis side thereof. Due to the movement of the piston rod (II), the taper portion (11a) comes into contact with the cam surface (13a), and the holding member (13) is pressed. The Kao-guchi (1) provided on this is pressed against the inner surface of the cylindrical structure (2). In this way, the piston rod ( The tape means (11a) of (11) and the cam surface (13a) of the holding member ^ constitute cam means (). The tube has a narrow flat surface (12a) and a sloped surface (12b) on both sides thereof. It has the advantage that it can increase the pressing force against the inner surface of the molded product, and that the inner surface can be processed smoothly. However, as the shape of the E-roller, besides, a beer barrel shape having a gentle convexity, a shape having various shaped ώ portions, a cylindrical body, or the like can be used as appropriate. Further, it is possible to adopt a configuration for forcibly driving and rotating the inlet-roller.

(IS) is a compression panel, which is interposed between the main body of the pressurizing section (6a) and the holding member & 3), and is operated by the action of the cam means (15).

O PI WIPO *. When the holding member ³ ) is pushed and moved E, it is compressed by EE, and when the cam operation is released, the holding member () is returned to the original position, that is, the non-pressing operation position. Play a role.

Fig. 3 shows a state in which the cam action by the cam means is released, the E compression spring (16) is extended, and the holding member ^ is in the non-pressing action position.

⁷ ) As shown in Figs. 1 and 2, ⁷ ) is a byte for cutting the inner surface of the cylindrical structure (), which is attached to the tip of the E (6a). I have.

Fig. 3 shows this byte (17) in the unfolded state O

Next, the method of the present invention will be described using the above-described centrifugal mirror mold (1) and driving means (6).

First, the aluminum alloy water is poured into a mold (1), and a cylindrical structure is formed by centrifugal forming. Next, the pressurizing portion (6a) of the pressurizing means (6) is inserted into the hollow portion of the cylindrical structure.

Immediately after the cylindrical structure is solidified, the oil E cylinder ( ⁹ ) of the pressurizing force generating section (6b) is operated, and the piston rod (11) is pulled. Then, the taper portion (11a) at the tip is moved toward the inner surface of the cylindrical structure (2) by the cam action of the holding member (13) of the heating roller (12). .

As a result, the inner surface of each cylindrical roller is press-formed. During this time, the front mold (1) continues to rotate, and the visiting roller (2) performs the EE forming while idle.

The pressure generating section (6b) is moved by the moving device (19) on the rail ( ⁷ ), so that the pressurizing section (6a) is cylindrical. It is moved in the axial direction of the product (2) to perform E-forming over the entire inner surface of the cylinder.

Note that the description of the step of cutting the inner surface of the cylindrical mirror product ( ² ) by the pipe (17) is omitted, but if this cutting step is performed before the E-forming step, the cylindrical shape is reduced. The inner diameter of the product (2) can be set to the same value, and the pressing force over the entire inner surface of the subsequent mirror (12) will be almost constant. Come on, yo! ) Excellent quality tubular products can be obtained.

In addition, if a cutting step is performed after the above-mentioned pressure forming step, the inner diameter of the cylindrical mirror product can be set to a desired value.

Furthermore, by first performing the cutting process, then performing the inner surface forming process, and then performing the cutting process again, the advantages of the above two methods can be obtained. You. .

In addition, after the final cutting process is completed, special processes such as surface treatment and hardening treatment are added to obtain cylindrical products with quality suitable for various applications. Let's do it a Next, the above-described present invention will be described below in Example 1.

Example 1>

Μ — 45% ¾ The alloy is centrifugally formed into a single-wall thickness of 35 weave, and pressurized at 300 C after solidification is completed, leaving the cylindrical structure as a 铸 and body. The inner surface was pressurized by a roller with a pressing force of 200 mm, and the inner surface was reciprocated twice over the entire length of the inner surface to reduce the wall thickness by 0.5.

Was taken the photo after applying the stain penetration flaw detection test to the cross section of the tubular篛造goods in this good cormorants is Fi _g .4.

The center part of the cylindrical structure shown in Fig. 4 has been subjected to the above-mentioned press forming, and both sides are in the state as formed by the conventional centrifugal forming method. .

As is evident from Fig. 4, the part subjected to the inner surface addition according to the method of the present invention is shown in white, that is, it has been changed to a dense structure, and the shrinkage cavities on both sides. It can be seen that it is black (actually stained red) due to the generation of bubbles and bubbles.

Table 1 shows the changes in the mechanical properties near the inner diameter of this structure and those obtained by the conventional method.

-However, each of the test specimens was taken at an outer diameter of 14 males, with the center located at 10 ° from the inner diameter of the cylindrical structure.

Next, Example 2 for showing the surface hardening accompanying the inner surface press forming of the cylindrical shaped article as the object of the present invention will be described below.

A cylindrical product was manufactured using an aluminum alloy substantially the same as in Example 1 above, and the pressing force of the press roller was set to 400.

関係 shows the relationship between the temperature at the time of press forming when press forming is performed and the hardness at room temperature of the inner surface and the outer surface of the unformed outer shape of the cylindrical molded product at that temperature. Table 2 shows the relationship between the elongation and the tensile strength of the gi aluminum alloy at the temperature at which the pressure forming is performed.

Table 2

OMPI WIPO 53)

As can be seen from Table 2 above, the hardness of the inner surface of the cylindrical product subjected to internal pressure processing at 500 ° C is higher than the hardness of the outer surface of the larger cylindrical product. Is also large. And, as the temperature of the pressing decreases,

Five-sided hardness increases, about 150 ° C to 100 ° C. You can see that the limit is almost reached at C.

Conversely, it can be seen that the elongation of the mechanical properties of the aluminum-alloy increases remarkably as the temperature rises from about 100 ° C., ie, the transition temperature.

10 This means that if the method of the present invention is carried out between the temperature immediately after solidification of the metal to be forged and the transition temperature of the metal, the heat treatment will be small in the low steel state of the metal. Shrinkage cavities and air bubbles are pressed and immersed by pressure, and a dense metal structure can be obtained almost uniformly in the thickness direction of the cross section of the cylindrical product, and the hardness of the processed surface can be increased. The solution is

^ o

From Table 2 above, it can be seen that the tensile strength is about 200 ° C., and that it decreases significantly as the temperature rises. From 50 ° C to about 200 ° C

It can be seen that if pressure forming is performed until 20 hours, internal forming with relatively high hardness can be performed with a smaller pressing force.

Note that the transition temperature of other metals is about 50,000 for steel and iron, for example. C, 180-180 ° C in 18-18 stainless steel, And copper alloy (copper 70%, zinc 30%). c. ^ Details: As described above, according to the present invention, it is possible to improve the quality by adding the inner surface of a cylindrical structure, As shown in Fig. 5, by increasing the pressing force partially in a high temperature condition, a step can be formed on the inner surface of the cylinder, and the shape processing is also possible.

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Fig. 7 shows a cylindrical structure with a tapered cross section.

6 can apply the method of the present invention to a cylindrical product having a polygonal outer shape as shown in FIG.

In the present invention, the pressurizing means ( ⁶ ) uses a hydraulic pressure, but any structure may be used as long as it can pressurize the inner surface of the cylindrical structure ( ² ).

In addition, the method of rotating the cylindrical structure (2) and the pressurizing section (6a) of the pressurizing means ( ⁶ ) relative to each other is based on the case where the mold for centrifugal machine described above is used. Alternatively, the pressurizing section (6a) side may be rotated, or the mold and the mold (1) holding the tubular structure ( ² ) may be rotated in the opposite direction. .

Further, the peripheral speeds of the two contact portions may be different from each other in the same direction.

Such a relative rotation method is also applicable to a case in which a tubular consolidation product is inserted by another manufacturing method and the formed product is held by another chuck or the like to perform pressure forming. Also, the driving means ( ⁵ ) for rotating the pressurizing means (6) and the cylindrical structure relative to each other has an appropriate structure.

OHFI WIPO d5)

Is used.

Industrial applicability

As can be seen from the above description, the method and apparatus for processing the inner surface of a cylindrical product according to the present invention provide strength and airtightness of the cylindrical product and abrasion resistance and corrosion resistance of the inner surface. Since it can be improved, it can be used for various purposes, which is extremely useful for industrial use.

Claims

(16)

- The scope of the claims

1. For the cylindrical mirror product molded by embedding, locate the pressurizing section (6a) of the pressurizing means (6) in the hollow portion of the cylindrical mirror product. Within the temperature range from immediately after to the transition temperature, the pressurizing section (6a) and the cylindrical structure (2) are rotated by the pressurizing section (6a) while rotating relatively. A method for processing an inner surface of a tubular structure, wherein the inner surface of the tubular structure is pressure-formed.

2. The method according to claim 1, wherein the incorporation of the tubular structure is performed by a centrifugal mirror method. Processing method.

3. A method according to claim 2, wherein the tubular structure is characterized by being made of an aluminum alloy. Inner surface processing method of the product.

4. The method according to claim 3, wherein the temperature range of the internal molding of the cylindrical shaped product ( ² ) is from 450 to 450.

The internal force of a tubular structure characterized by being between 150!]

5. The method according to claim 2 or 4, wherein the tubular structure is configured to rotate with respect to the pressurizing portion (6a).方法 Method of processing the inner surface of the product.

6. The method according to claim 2 or '4, wherein the pressurizing portion (6a; rotating with respect to the cylindrical structure (2)).方法 Method of processing the inner surface of the product.

Ο ΡΙ WIPO tt7)

7. The method according to claim 2 or 4, wherein

The cylindrical structure) and the pressurizing section (6a) are rotated in the same direction.

And a method of machining the inner surface of a tubular structure, characterized in that the relative peripheral speeds of the two are different.

8. The method according to claim 2 or 4, wherein

The cylindrical structure ( ² ) and the pressurizing section (6) are

Inner surface processing method for cylindrical shaped products characterized by being rotated

9. The method according to claim 1 or 4, wherein

The pressurizing section [6a] is used to pressurize the inner surface of the tubular structure (2).

It is characterized in that its inner surface is cut before forming.

Inner surface machining method for cylindrical shaped products.

10. The method according to claim 1 or 5, wherein

The pressurizing section (6a) pressurizes the inner surface of the cylindrical structure (2).

In the shape, the pressurizing section (6a) is connected to the axis of the cylindrical mirror product (2).

. Cylindrical mirrors that move along the core direction

Inner surface processing method of the product.

11. The method according to claim 10, wherein said cylindrical mold

移動 Movement of the pressurizing section (6a) in the axial direction of the product ( ² )

The generated pressure is changed to change the cylindrical shape.

Cylindrical shape characterized by forming a step on the inner surface of the product

方法 Method of processing the inner surface of the product. '

12. In the temperature range from immediately after solidification to the transition temperature

The inner surface of the cylindrical mirror product is pressurized.

-¾υ ¾Η

Ο? Ι \ (18)

It is characterized by comprising a pressurizing means (6) provided with a pressurizing shaft [6], and a driving means (5) for relatively rotating the pressurizing part (6a). Inner surface processing equipment for cylindrical shaped products.

13. The apparatus according to claim 12, wherein the EE5 means (6) is located in a hollow portion of the tubular structure (2).

What is the pressure part (6a) and the pressure generation part [6] located outside it? The former (6a) is composed of at least one heating roller © contacting the inner surface of the tubular structure ( ² ) and the pressurizing roller (12). 10) means (15) for pressing and displacing the inner surface of the (manufactured product), and the latter [6] acts on the cam means 5).

An internal surface machining apparatus for cylindrical shaped articles, characterized in that it includes a hydraulic cylinder-( ⁹ ).

14. The apparatus according to claim 13, wherein said pressurizing is performed.

B-La 02) is at equal intervals around the

15 It is characterized that three are arranged and that it is freely rotatable.

Internal processing equipment for cylindrical mirror products.

'15. The apparatus according to claim 14, wherein the driving is performed.

The means (δ) is an inner surface machining apparatus for a cylindrical rust product, characterized in that the means is configured to rotate only the cylindrical rust product.

20 16. The apparatus according to claim 14, wherein the driving is performed.

The means ( ⁵ ) is an inner surface machining apparatus for a cylindrical mirror product, characterized in that the means ( ⁵ ) is configured to rotate only the heating section (6a) of the heating means ( ⁶ ).

17. The apparatus according to claim 14, wherein the driving is performed. The means (5) is characterized in that the cylindrical structure (2) and the pressurizing portion (6a) of the pressurizing means (6) are configured to rotate in mutually opposite directions. Inner surface processing equipment for cylindrical rust products. '.

18. The device according to claim 14, wherein the driving means ( ₅ ) is the cylindrical mirror product) and a pressurizing portion of the pressurizing means ( ⁶ ).

(6a) An inner surface machining apparatus for a cylindrical shaped product, characterized in that it is configured to rotate in a same direction and so that peripheral speeds of contact between them are different from each other.

19. The apparatus according to claim 15, wherein the drive means (δ) is connected to a centrifugal mold (die), at least one drive roller). And an electric motor ( ⁴ ).

20. The apparatus according to claim 19, wherein said pressurizing is performed.

The roller (12) is characterized in that it has a flat bearing surface (12a) at its center and a sloped surface (1213) on both sides of the surface.錡 Internal processing equipment for manufactured products.

21. The apparatus according to claim 19, wherein said pressurizing is performed.

The inner surface machining apparatus for a tubular product is characterized in that the mouth part 02) is formed in a via barrel shape having a smooth 'convex surface' at the center thereof.

22. The apparatus according to claim 20, wherein said cam is provided.

The means (15) includes a force surface formed in the holding shaolin (13) holding the pressurized roller (12) and a screw of the oil cylinder (9).

OMPI WIPO 80/01257-.. PGT / JP79 / 003

(20)

An inner surface machining device for cylindrical shaped products, characterized by a tapered part (lla) formed at the end of the tonrod αΐ).

23. The apparatus according to claim 22, wherein said pressurizing is performed.

The s section (6a) further includes a holding member (13) of the pressure roller 02).

At least one compression panel between the pressurizing section (6a) and the main body

An internal surface machining apparatus for cylindrical shaped products, characterized in that (16) is provided.

24. The device according to claim 13 or 23.

The pressurizing means ( ⁶ ) further includes a moving device (6c).

An inner surface processing device for cylindrical shaped products.

25. The apparatus according to claim 24, wherein said moving is performed.

The device (6c) includes an oil EE cylinder (19) and a piston rod (20), and one end of the piston rod (20) is connected to the E-side generating section.

s (6¾)

Internal surface processing equipment.

26. The apparatus according to claim 13, wherein the pressurization is performed.

An inner surface machining apparatus for a tubular structure, characterized in that the roller 02) is forcibly driven and rotated.

OMPI