JP2002030477A - Method for producing electrodeposited bellows and mandrel for producing electrodeposited bellows - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing electrodeposited bellows by which there is a need of performing the cutting of a plating layer, and also, the dimensional precision of the edge parts of electrodeposited bellows can be improved and to provide a mandrel for producing electrodeposited bellows. SOLUTION: This method for producing electrodeposited bellows (1) comprises an O-ring mounting stage in which nonconductive O-rings (11) having elasticity are inserted into ringlike O-ring grooves (8) provided on both edge parts of the electrodeposited bellows forming part (7) of a mandrel (6), an electroplating stage in which the mandrel mounted with the O-rings is dipped into a plating solution and is subjected to electroplating to form electrodeposited bellows on the electrodeposited bellows forming part, an O-ring removing stage in which the O-rings are removed from the electroplated mandrel, and a mandrel dissolving stage in which the body of the mandrel freed from the O-rings is dissolved and the mandrel is removed from the electrodeposited bellows formed on the electrodeposited bellows forming part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an electrodeposited bellows in which a mandrel body is formed by electroplating the surface of a mandrel and then melting the mandrel body, and a mandrel for manufacturing an electrodeposited bellows.

[0002]

2. Description of the Related Art A conventional method for producing an electrodeposited bellows is shown in FIG.
This will be described with reference to FIG. 6A and 6B are explanatory views for explaining a conventional method for manufacturing an electrodeposited bellows, wherein FIG. 6A is a cross-sectional view of a mandrel, FIG. 6B is a cross-sectional view of a main part of an electroplated mandrel, and FIG. FIG. 2 is a cross-sectional view of a main part of the mandrel, taken along a line, and (d) is a cross-sectional view of a main part of the manufactured electrodeposition bellows.

When manufacturing an electrodeposited bellows, first, a mandrel 01 shown in FIG. 6A is placed in a plating tank and electroplating is performed. Then, as shown in FIG. 6B, a plating layer 02 is formed on the surface of the mandrel 01. Then, as shown in FIG. 6C, both ends of the mandrel 01 on which the plating layer 02 is formed are cut,
Next, the main body of the mandrel 01 was melted, and FIG.
As shown in (d), the mandrel 01 is removed from the plating layer 02. The plating layer 02 from which the mandrel 01 has been removed becomes the electrodeposition bellows 03.

[0004]

By the way, in the conventional method of manufacturing the electrodeposited bellows, the mandrel 0 after the electroplating is used.
When dissolving 1, it is necessary to remove a part of the plating layer 02 covering the entire mandrel 01. Therefore, post-processing such as cutting the plating layer 02 is necessary,
Manufacturing costs increase. Further, burrs are generated at the ends of the electrodeposition bellows 03 when the plating layer 02 is cut. Further, the dimensional accuracy of the end of the electrodeposition bellows 03 may be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and does not require cutting of a plating layer.
An object of the present invention is to provide a method of manufacturing an electrodeposited bellows and a mandrel for manufacturing the electrodeposited bellows, which can improve the dimensional accuracy of an end portion of the electrodeposited bellows.

[0006]

According to the present invention, there is provided a method of manufacturing an electrodeposited bellows (1) for a ring-shaped O-ring provided at both ends of an electrodeposited bellows forming portion (7) of a mandrel (6). An O-ring mounting step of fitting an elastic non-conductive O-ring (11) into the groove (8), and dipping the mandrel on which the O-ring is mounted in a plating solution to perform electroplating; An electroplating step of forming an electrodeposited bellows on the forming portion, an O-ring removal step of removing an O-ring from the electroplated mandrel, and dissolving the main body of the mandrel from which the O-ring has been removed to form the electrodeposited bellows. A mandrel dissolving step of removing the mandrel from the electrodeposited bellows formed in the portion.

The mandrel for producing an electrodeposited bellows according to the present invention forms an electrodeposited bellows by electroplating the surface and then dissolving the mandrel main body. Ring-shaped O-ring grooves into which non-conductive O-rings are fitted are formed at both ends of the bellows forming portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method for manufacturing an electrodeposited bellows according to the present invention will be described. FIG. 1 is a schematic sectional view of a plating tank used in a method for producing an electrodeposited bellows. FIG. 2 is a perspective view of the electrodeposition bellows. FIG. 3 is a perspective view of a mandrel and an O-ring used in the method for manufacturing an electrodeposited bellows of the present invention. 4A and 4B are explanatory views for explaining a method for manufacturing an electrodeposited bellows of the present invention. FIG. 4A is a cross-sectional view of a mandrel, FIG. 4B is a cross-sectional view of a main part of an electroplated mandrel, and FIG. It is principal part sectional drawing of the mandrel from which the ring was removed, (d) is principal part sectional drawing of the manufactured electrodeposition bellows. FIG. 5 is a sectional view of a main part of a modification of the mandrel.

Referring to FIG. 2, an electrodeposited bellows 1 used for a bellows coupling or the like includes a bellows portion 2 and cylindrical connecting portions 3 provided on both sides of the bellows portion 2. The unit 3 is connected to a rotating shaft such as a motor or an encoder. The mandrel 6 used when manufacturing the electrodeposited bellows 1 is shown in FIGS. 3 and 4, and a bellows forming portion 7 a for forming the bellows portion 2 of the electrodeposited bellows 1, and the bellows forming portion 7 a A connecting portion forming portion 7b provided on both sides of the portion 7a is provided at a central portion,
The bellows forming part 7a and the connecting part forming part 7b constitute the electrodeposition bellows forming part 7. The large-diameter portions d and the small-diameter portions s are alternately formed in the bellows forming portion 7a. O-ring grooves 8 are provided at both ends of the electrodeposited bellows forming portion 7 in a ring shape. The mandrel 6 has a cylindrical shape, and has a mounting hole 9 formed in the center axis. The mandrel 6 is made of a resin containing a metal or a conductive material. The O-ring 11 fitted in each O-ring groove 8 is formed of an elastic material such as silicon rubber which is non-conductive and has chemical resistance (corrosion resistance to plating solution).

When the electrodeposited bellows 1 is manufactured, first, the O-ring 11 is fitted into the O-ring groove 8 of the mandrel 6 (O-ring mounting step). The O-ring 11 as a masking material has elasticity as described above, and can be easily fitted into the O-ring groove 8 and substantially adheres to the O-ring groove 8 after mounting. In this O-ring mounting step, the mandrel 6 is in the state shown in FIG.

Next, the mandrel 6 on which the O-ring 11 is mounted is put into a plating tank 16 in which a plating solution is stored, and the mandrel 6 is immersed in the plating solution. That is, the plating tank 16 is provided with an electrode rod 17 on the cathode side (− side) and an electrode rod 18 on the anode side (+ side). The electrode rod 17 on the cathode side has a clip for supporting an article to be plated. And a plurality of support fittings 19 are provided in a tree shape. The mandrel 6 is attached by fitting the attachment hole 9 into a support fitting 19. Then, electricity is supplied to the electrode rods 17 and 18 to perform electroplating on the mandrel 6 which is a product to be plated (electroplating step). In this electroplating step, the mandrel 6 is in the state shown in FIG. 4B, and the plating layer 21 is formed on the surface of the mandrel 6. Since the O-ring 11 is non-conductive, the O-ring 1
No plating layer is formed on the surface of No. 1. Therefore, the plating layer 21 on the mandrel 6 is
The upper plating layer 21a and the plating layer 21b other than the electrodeposition bellows forming portion 7 are formed separately by the O-ring groove 8.

Next, the O-ring 11 is removed from the electroplated mandrel 6 (O-ring removing step). In this O-ring removal process, the mandrel 6
The state shown in FIG.

Then, the mandrel 6 from which the O-ring 11 has been removed is put into a dissolving tank (not shown) in which a dissolving solution is stored. Then, the solution that has entered through the O-ring groove 8 dissolves the main body of the mandrel 6, leaving only the plating layer 21 (mandrel dissolving step). Then, the plating layer 21 a on the electrodeposited bellows forming portion 7 from which the mandrel 6 has been removed becomes the electrodeposited bellows 1. Thus, the electrodeposited bellows 1 is manufactured.

Next, a modification of the mandrel 6 will be described.
In the above-described embodiment, the connecting portion forming portion 7 of the mandrel 6 is used.
The diameter of b is the same as the small diameter part s of the bellows forming part 7a,
As shown in FIG. 5A, the diameter of the connecting portion forming portion 7b can be the same as the large diameter portion d of the bellows forming portion 7a. Further, each mandrel 6 is provided with one electrodeposition bellows forming portion 7, but as shown in FIG. 5B, a plurality of electrodeposition bellows forming portions 7 are attached to one mandrel 6 by an O-ring. It is also possible to provide them continuously through the groove 8. In any of the modifications, the electrodeposition bellows forming portion 7
O-ring grooves 8 are provided on both sides of the O-ring, and an O-ring 11 is mounted. Also in these modifications, the method of manufacturing the electrodeposited bellows 1 is substantially the same as the method shown in FIG.

As described above, in this embodiment, the O-ring groove 8 is provided in the mandrel 6, and the O-ring 11 is mounted in the O-ring groove 8. 8 is not plated. After plating, the O-ring 11 is removed, and the mandrel 6 is melted from the O-ring groove 8 to manufacture the electrodeposited bellows 1. Therefore, there is no need to cut the mandrel 6 after plating, and the work becomes easy. In addition, it is possible to prevent the occurrence of burrs due to the cutting. In addition, since the mounting position of the O-ring 11 is determined by the O-ring groove 8, the mounting accuracy of the O-ring 11 can be increased, and the dimensional accuracy of the electrodeposited bellows 1 is accordingly improved. In particular, when the mandrel 6 is integrally formed with a mold, the accuracy of the formation position of the O-ring groove 8 is extremely high, and the dimensional accuracy of the electrodeposited bellows 1 is also improved. Furthermore, the O-ring 11 has elasticity, so that it can be easily attached and detached and reused.
The amount and cost of waste can be reduced.

The shape of the O-ring groove can be appropriately changed as long as the O-ring can be fitted.
Further, the cross-sectional shape of the O-ring can be appropriately selected, and may be other than circular. For example, an oval shape is also possible. Further, the diameter of the connecting portion forming portion of the mandrel can be appropriately selected regardless of the diameter of the bellows forming portion. The O-ring has such non-conductivity that a plating layer is not formed on the surface during electroplating.

[0017]

According to the present invention, an O-ring groove is provided at both ends of the electrodeposited bellows forming portion of the mandrel, and a non-conductive O-ring is mounted in the O-ring groove.
O-ring grooves are not plated during electroplating.
Then, after plating, the O-ring is removed, and the mandrel is melted from the O-ring groove to manufacture an electrodeposited bellows. Therefore, after plating the mandrel, there is no need to cut the plated mandrel, and the work is facilitated. In addition, it is possible to prevent the occurrence of burrs due to the cutting. In addition, the mounting position of the O-ring is determined by the O-ring groove, so that the mounting accuracy can be increased, and accordingly, the dimensional accuracy of the electrodeposited bellows is also improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a plating tank used in a method for manufacturing an electrodeposition bellows.

FIG. 2 is a perspective view of an electrodeposition bellows.

FIG. 3 is a perspective view of a mandrel and an O-ring used in the method for manufacturing an electrodeposited bellows of the present invention.

FIG. 4 is an explanatory view for explaining a method for manufacturing an electrodeposited bellows of the present invention, wherein (a) is a cross-sectional view of a mandrel,
(B) is a cross-sectional view of a main part of the electroplated mandrel,
(C) is a sectional view of a main part of a mandrel from which an O-ring is removed, and (d) is a sectional view of a main part of a manufactured electrodeposition bellows.

FIG. 5 is a sectional view of a main part of a modification of the mandrel.

FIG. 6 is an explanatory view for explaining a conventional method for manufacturing an electrodeposited bellows, in which (a) is a sectional view of a mandrel,
(B) is a cross-sectional view of a main part of the electroplated mandrel,
(C) is a sectional view of an essential part of the mandrel in which both ends are cut off,
(D) is a sectional view of a main part of the manufactured electrodeposition bellows.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrodeposited bellows 6 Mandrel 7 Electrodeposited bellows forming part 8 O-ring groove 11 O-ring

Claims (2)

[Claims] An O-ring mounting step of fitting an elastic non-conductive O-ring into a ring-shaped O-ring groove provided at both ends of an electrodeposition bellows forming portion of a mandrel; An electroplating step of immersing the mandrel on which the is mounted with a plating solution to perform electroplating to form an electroplated bellows on the electroplated bellows forming portion; and removing an O-ring from the electroplated mandrel.
A ring removing step, and a mandrel melting step of melting the main body of the mandrel from which the O-ring has been removed and removing the mandrel from the electrodeposited bellows formed in the electrodeposited bellows forming section. Production method of electrodeposited bellows. 2. A mandrel for producing an electrodeposited bellows, which forms an electrodeposited bellows by dissolving a mandrel main body after electroplating the surface, wherein both ends of an electrodeposited bellows forming portion forming the electrodeposited bellows are provided. A mandrel for producing an electrodeposited bellows, wherein a ring-shaped groove for an O-ring into which a non-conductive O-ring is fitted is formed.