Rust-proof treatment method for cylindrical member

Abstract

A rust prevention treatment method for a cylindrical member according to the present invention comprises: a first end forming step for forming, at one end of the cylindrical member, a first end that seals the one end; an anti-rust material insertion step of inserting an anti-rust material into the cylindrical member, the anti-rust material having an anti-scattering material, a vaporizable anti-rust agent covered by the anti-scattering material, and a holding sheet for holding the vaporizable anti-rust agent; a second end portion forming step of forming a second end portion on an end portion of the cylindrical member on the opposite side from the first end portion after the rust-proof material is accommodated in the cylindrical member; and an anti-rust agent gasification step for gasifying the gasified anti-rust agent.

Description

Technical Field

[0001] The invention relates to a rust-proof treatment method for a tubular component. Background Art

[0002] A stabilizer bar used in a vehicle or the like is installed on the vehicle to stabilize the posture of the vehicle. A stabilizer bar is known that is formed by deforming a hollow cylindrical member in order to reduce the weight of the vehicle. When a cylindrical member is used to make a stabilizer bar, the inside of the stabilizer bar needs to have a rust-proof function. For example, in Patent Document 1, a rust-proof film is formed inside the stabilizer bar by sealing a vaporizing powder rust-proof agent inside the stabilizer bar and vaporizing the vaporizing rust-proof agent.

[0003] Patent Document 1: International Publication No. 2017 / 170787 Invention Summary Summary of the invention

[0004] However, the vaporizable rust inhibitor is in the form of powder, which is difficult to handle and sometimes makes it difficult to perform rust prevention treatment.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for rust-proofing a tubular member, which can easily perform rust-proofing on the inside of the tubular member.

[0006] In order to solve the above-mentioned problems and achieve the purpose, the rust-proof treatment method of a tubular component of the present invention is a rust-proof treatment method of a tubular component, which includes: a first end forming step, forming a first end to seal one end at one end of the tubular component; a rust-proof material inserting step, inserting the rust-proof material into the tubular component, the rust-proof material having an anti-scattering material, a gasifiable rust inhibitor covered by the anti-scattering material, and a retaining sheet for retaining the gasifiable rust inhibitor; a second end forming step, after the rust-proof material is accommodated in the tubular component, forming a second end to seal the end at the end of the tubular component on the opposite side of the first end; and a rust-proof agent gasification step, gasifying the gasifiable rust inhibitor.

[0007] In addition, the rust prevention method for a tubular member of the present invention is such that, in the above invention, the holding sheet is in a sheet shape for placing the vaporizable rust inhibitor and the scattering prevention material.

[0008] In addition, the rust prevention method for a tubular member of the present invention is characterized in that, in the above invention, the holding sheet is in a bag shape and contains the vaporizable rust inhibitor and the scattering prevention material.

[0009] In addition, the rust prevention method for a tubular member of the present invention is such that, in the above invention, the scatter prevention material is a liquid or solid having viscosity at room temperature.

[0010] According to the present invention, there is an effect that the rust prevention treatment inside the stabilizer bar can be easily performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a perspective view showing an example of a suspension mechanism including a stabilizer bar according to an embodiment of the present invention.

[0012] Figure 2 Yes means Figure 1 A top view of the structure of the stabilizer bar is shown.

[0013] Figure 3 This is a perspective view showing the structure of a tubular member for manufacturing a stabilizer bar according to one embodiment of the present invention.

[0014] Figure 4 This is a perspective view for explaining the structure of a rust-proof material used in rust-proof treatment.

[0015] Figure 5 yes Figure 4 The AA line cross-sectional view is shown.

[0016] Figure 6 This is a diagram for explaining the rust-proofing treatment performed on the inside of the stabilizer bar according to one embodiment of the present invention (part 1).

[0017] Figure 7 This is a diagram for explaining the rust-proofing treatment performed on the inside of the stabilizer bar according to one embodiment of the present invention (part 2).

[0018] Figure 8 This is a diagram (part 3) for explaining the rust-proofing treatment performed on the inside of the stabilizer bar according to one embodiment of the present invention.

[0019] Fig. 9 This is a diagram (part 4) for explaining the rust prevention treatment performed on the inside of the stabilizer bar according to one embodiment of the present invention.

[0020] Fig.10 It is a perspective view for explaining the structure of the rust-proof material of a modification. DETAILED DESCRIPTION

[0021] Below, the method for implementing the present invention (hereinafter referred to as "implementation method") is described with reference to the accompanying drawings. In addition, the accompanying drawings are schematic diagrams, and the relationship between the thickness and width of each part, the ratio of the thickness of each part, etc. may be different from the actual situation, and the accompanying drawings may sometimes include parts with different size relationships or ratios.

[0022] Implementation

[0023] Figure 1 It is a perspective view showing an example of a suspension mechanism including a stabilizer bar according to an embodiment of the present invention. Figure 1 The suspension mechanism 100 shown in the figure includes a stabilizer bar 1, suspensions 101, 102, and connecting rods 103, 104. The suspensions 101, 102 include a retractable coil spring. When the suspension mechanism 100 is installed in a car, it is installed for tires 111, 112 (for example, front wheels) to absorb vibrations transmitted from the tires 111, 112 corresponding to the unevenness of the road surface. The stabilizer bar 1 and the suspensions 101, 102 are connected via connecting rods 103, 104, respectively.

[0024] Figure 2 Yes means Figure 1 The stabilizer bar 1 is a top view of the structure of the stabilizer bar shown in FIG. The stabilizer bar 1 is a hollow cylindrical member (tubular member) made of metal or various fibers (e.g., carbon fibers), and is made of, for example, a material having a 0.2% yield strength in the range of 1000 to 1600 MPa. The stabilizer bar 1 has a main body 10, a first end 11 connected to one end of the main body 10, and a second end 12 connected to the other end of the main body 10.

[0025] The central part of the main body 10 extends in a straight line, and the two ends of the main body 10 are bent. The first end 11 and the second end 12 are flattened by squeezing the cylindrical member. In addition, the first end 11 and the second end 12 are formed with through holes (not shown) for inserting the fastening member.

[0026] Next, refer to Figure 3 to Figure 9 The following describes the rust prevention treatment of the interior of the stabilizer bar 1. The stabilizer bar 1 is manufactured by processing a base material.

[0027] Figure 3 1 is a perspective view showing the structure of a cylindrical component for manufacturing a stabilizer bar according to an embodiment of the present invention. The cylindrical component 20, which is a base material of the stabilizer bar 1, is in a cylindrical shape extending with a fixed inner diameter and outer diameter. The wall thickness of the cylindrical component 20 is, for example, the same as the wall thickness of the main body 10 of the stabilizer bar 1.

[0028] Figure 4 This is a perspective view for explaining the structure of a rust-proof material used in rust-proof treatment. Figure 5 yes Figure 4 AA line cross-sectional view shown. In this embodiment, a rust-proof material 30 is used in the rust-proof treatment. The rust-proof material 30 includes: a holding sheet 31, a vaporizing rust-proof agent 32, and a scattering prevention material 33. The rust-proof material 30 is formed so that the vaporizing rust-proof agent 32 placed on the holding sheet 31 is covered by the scattering prevention material 33 (see Figure 4 ).

[0029] The holding sheet 31 is formed using, for example, Japanese paper or wax paper.

[0030] The vaporizing rust preventive 32 is, for example, a powder, and the rust preventive component is vaporized by heating. The temperature at which the rust preventive component is vaporized is room temperature, or is set according to the heating temperature applied after being sealed in the tubular member 20. For example, the vaporizing rust preventive 32 can use "VERZONE ECOSUPER-K" (manufactured by Yamato Kasei Co., Ltd.) and "Zerust (registered trademark) ActivPowder TM (LS)-10F" (made by Northern Technologies International Corporation).

[0031] The anti-scattering material 33 is formed of a grease-like substance (such as wax), which is a viscous liquid or solid at room temperature. The anti-scattering material 33 can be, for example, hot melt adhesive (glue stick).

[0032] Figure 6 to Figure 9 1 is a diagram for explaining the rust prevention treatment performed on the inside of the stabilizer bar according to one embodiment of the present invention. Figure 3 The rust prevention treatment in the case of manufacturing a stabilizer bar using the cylindrical member 20 shown will be described.

[0033] First, one end of the tubular member 20 is flattened to form the one end into a flat shape, so that the one end of the tubular member 20 is in a closed shape (see Figure 6 ). Thus, the opening 20a is formed only on one side of the tubular member 20, and a flat first end 21 is formed at the other end (first end forming step).

[0034] Next, the rust-proof material 30 is housed in the cylindrical member 20 (see Figure 7 At this time, the rust-proof material 30 is inserted from the opening 20a of the tubular member 20 (rust-proof material inserting step).

[0035] Furthermore, as long as the rust-proofing material 30 does not come off the tubular member 20 , the rust-proofing material 30 may be inserted into the tubular member 20 before the first end portion 21 is formed.

[0036] After the rust-proof material 30 is accommodated, the end portion of the opening 20a side of the cylindrical member 20 is flattened to form the one end into a flat shape, so that both ends of the cylindrical member 20 are closed (see Figure 8 ). Thus, a flat second end 22 is formed at the end opposite to the first end 21 of the tubular member 20 (second end forming step). Therefore, the tubular member 20 has a shape with both ends closed based on the first end 21 and the second end. Thus, the rust-proof material 30 is sealed in the tubular member 20.

[0037] Next, the vaporizing rust preventive 32 is vaporized (rust preventive vaporization step: see Fig. 9 ). At this time, when the gasifying rust preventive 32 is a rust preventive that gasifies at room temperature, it is placed at room temperature for the time required for gasification. On the other hand, when the gasification temperature is high, the tubular member 20 is heated. The heating temperature is set to a temperature higher than the gasification temperature of the gasifying rust preventive 32, for example. At this time, the gasified gasifying rust preventive 32 either passes through the gap between the retaining sheet 31 and the anti-scattering material 33, or penetrates the anti-scattering material 33, and diffuses in the entire internal space of the tubular member 20.

[0038] In addition, only the rust-proofing treatment of the inside is described here, but when the stabilizer bar 1 is manufactured using the cylindrical member 20, well-known treatments such as shape forming, quenching, tempering, and shot peening are performed.

[0039] In this embodiment, the rust-proofing treatment can be performed by placing the rust-proofing material 30 in which the vaporizing rust-proofing agent 32 placed on the holding sheet 31 is covered with the anti-scattering material 33 into the cylindrical member 20 and performing a heating treatment. According to this embodiment, the powdered vaporizing rust-proofing agent 32 can be easily handled during the rust-proofing treatment, and as a result, the rust-proofing treatment inside the stabilizer bar can be easily performed.

[0040] Modifications

[0041] Next, refer to Fig.10 A modification of the present embodiment will be described. In this modification, the structure of the rust-proof material is different from that of the rust-proof material of the embodiment. Fig.10 It is a perspective view for explaining the structure of the rust-proof material of a modification.

[0042] The rust-proof material 30A is formed by a holding sheet 31 holding a vaporized rust-proof agent 32 and a scatter-proof material 33. Specifically, in this modified example, the holding sheet 31 is in a bag shape, and the vaporized rust-proof agent 32 and the scatter-proof material 33 are contained therein. Here, an example is shown in which the holding sheet 31 is formed into a bag shape by gathering the outer edges of the sheet, but it can also be formed in other shapes, such as making the holding sheet 31 into a cylindrical shape, twisting the two ends together to wrap the vaporized rust-proof agent 32 and the scatter-proof material 33, etc.

[0043] The operation method of the rust-proof material 30A during the rust-proof treatment is the same as that in the embodiment.

[0044] In this modification, as in the above-mentioned embodiment, the rust-proofing treatment can be performed by placing the rust-proofing material 30A in which the vaporizing rust-proofing agent 32 covered by the anti-scattering material 33 is wrapped by the retaining sheet 31 into the cylindrical member 20 and performing a heating treatment. According to this modification, the powdered vaporizing rust-proofing agent 32 can be easily handled during the rust-proofing treatment, and as a result, the rust-proofing treatment inside the stabilizer bar can be easily performed.

[0045] Furthermore, according to the present modification, since the vaporizable rust preventive agent 32 and the scattering prevention material 33 are wrapped by the holding sheet 31 , the workability can be further improved compared to the case where they are placed on a sheet in the embodiment.

[0046] In addition, when the rust prevention treatment is automated, the treatment is performed while the tubular member 20 is being transported to each treatment position. For example, the rust prevention material 30 is accommodated in the tubular member 20 by air conveyance or the like for the opening 20a of the tubular member 20 having the first end 21 formed therein. After the rust prevention material 30 is accommodated, the tubular member 20 is transported to a predetermined treatment position, and the second end 22 is formed and heated. By performing this treatment on each tubular member 20, the rust prevention treatment can be continuously performed.

[0047] Although the embodiment for implementing the present invention has been described above, the present invention should not be limited to the above embodiment. For example, the present invention can be applied to a product in which a gas such as a rust inhibitor is sealed in the inner peripheral surface of a cylindrical member.

[0048] Thus, the present invention may include various embodiments and the like that are not described herein, and various design changes and the like can be implemented without departing from the scope of the technical concept defined by the claims.

[0049] Industrial Applicability

[0050] As described above, the method for manufacturing a stabilizer bar of the present invention is suitable for easily performing rust prevention treatment on the inside of the stabilizer bar.

[0051] Explanation of symbols:

[0052] 1 Stabilizer bar

[0053] 10 Main body

[0054] 11, 21 First end

[0055] 12, 22 Second end

[0056] 20 Cylindrical parts

[0057] 30, 30A anti-rust material

[0058] 31. Retaining sheet

[0059] 32. Gasification rust inhibitor

[0060] 33 Anti-scattering material.

Claims

1. A method for rust prevention of a cylindrical component, characterized in that: include: A first end forming step of forming a first end portion at one end of the tubular member to seal the one end; a rust-proof material inserting step, inserting the rust-proof material into the cylindrical member, wherein the rust-proof material comprises an anti-scattering material, a vaporizing rust-proof agent covered by the anti-scattering material, and a retaining sheet for retaining the vaporizing rust-proof agent; A second end forming step of forming a second end portion to seal the end portion of the tubular member on the opposite side of the first end portion after the rust-proof material is accommodated in the tubular member; and The rust inhibitor gasification step gasifies the gasifiable rust inhibitor.

2. The rust-proofing method for a tubular component according to claim 1, characterized in that: The retaining sheet is in a sheet shape and is used to carry the vaporizable rust inhibitor and the anti-scattering material.

3. The rust-proofing method for a tubular component according to claim 1, characterized in that: The retaining sheet is in a bag shape and contains the vaporizable rust inhibitor and the anti-scattering material.

4. The rust-proofing method for a tubular component according to any one of claims 1 to 3, characterized in that: The anti-scattering material is a liquid or solid having viscosity at room temperature.

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