JP3064854U - Hard chrome plating equipment for vertical rolls - Google Patents

Abstract

(57) Abstract: A conductive material is provided in which a plating tank (1) for vertically immersing a roll (P), a support (2) is mounted above the plating tank (1), and is detachably connected to an upper end of the roll (P). Concatenated body 3
And a rotating shaft 4 of a conductive material connected to the upper portion of the connecting body 3 and electrically connected to and supported by the roll P. The rotating shaft 4 is rotatably supported on the support base 2 and is fixed to the upper end of the rotating shaft 4. A plurality of carbon terminals 6 are pressed against the plate 5 and energized while rotating a roll in the plating tank. [Effect] Plating with a uniform and precise thickness can be performed. It eliminates the need for a precision polishing step to make the plating thickness uniform. Significantly reduce the time to completion of the product and significantly reduce manufacturing costs.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a hard chrome plating apparatus for vertical rolls in which hard chrome plating (industrial chrome plating) is performed on the rolls. The invention relates to a hard chrome plating device for vertical rolls that can be used.

[0002]

[Prior art]

 Generally, when applying hard chrome plating to rolls, it is common sense that the plating process alone will result in an uneven thickness, and in order to make the plating thickness uniform, it was necessary to precisely polish the thicker plating. . In particular, when plating a long roll, it is known that the plating attached to the longitudinal end of the roll becomes thicker than the center of the roll. For example, if the plating thickness at the center of the roll is set to 50μ, the plating of about 70μ to 80μ adheres to the vicinity of the end of the roll. Therefore, when uniformly applying a 50μ thickness plating to the entire roll, plating is performed until the end of the roll is about 100μ thick, and then the entire roll is adjusted to a 50μ thickness by precision polishing. there were.

On the other hand, Japanese Patent Publication No. 4-35422 discloses a long material holding and energizing facility in which a roll for plating is suspended in a vertical plating tank to perform plating. According to the suspension type current supply equipment, the rolls are suspended by a crane, and the current collecting surface of the power supply device is brought into contact with a current supply / support surface provided on a flange of a suspension fitting. This plating apparatus is designed to simplify preparation before plating by simultaneously supporting and energizing a roll.

A rotary plating apparatus that performs plating while rotating an object to be plated is described in JP-A-57-131394. This rotary plating apparatus stacks a large number of ring-shaped workpieces through a jig shaft, rotates the jig shaft in a plating tank, and performs plating on the ring-shaped workpiece. is there.

[0005]

[Problems to be solved by the invention]

 However, in the case of conventional hard chrome plating, where thick plating is applied to a predetermined plating thickness by precision polishing, the polishing time is added to the plating time, so the time required to complete the product is extremely long. Become. Moreover, the polishing of a thickly plated surface not only adds polishing cost, but also increases the plating cost itself for plating a predetermined thickness or more. It was irrational. Furthermore, precision polishing for making the thickness of the plating uniform results in scratches on the plating surface, so that the surface roughness of the plating surface becomes rough.

On the other hand, in the conventional suspension-type current-carrying equipment, it is possible to simplify the preparation for plating by simultaneously supporting the rolls and energizing, but it is not possible to make the plating thickness uniform. Can not. Therefore, after plating, precision polishing is required to make the plating thickness accurate.

A conventional rotary plating apparatus is a technique used as decorative chrome plating for accessories and the like, and is an apparatus for performing thin 0.1 μm chromium plating on nickel plating. With this decorative chrome plating technique, it is difficult to apply hard chrome plating with a thickness of 3 μm or more to the metal without intermediate plating. That is, in the case of hard chrome plating, a higher current is applied for a longer time than in the case of decorative chrome plating, so that it was extremely difficult to make the contact surfaces of the power supply device always contact uniformly during rotation. Therefore, when a current is applied, an irregular spark-like load is applied to the contact portion, and the plating thickness must be irregular.

Accordingly, the present invention has been created to solve the above-described problems, and enables plating of uniform and precise thickness, and hard chrome plating for a vertical roll, which does not require a precision polishing process after plating. It is intended to provide a device.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, a first means of the present invention is to provide a plating tank 1 for vertically immersing a roll P in a hard chrome plating apparatus, and mounting a support base 2 above the plating tank 1. A conductive connecting member 3 detachably connected to the upper end of the roll P, and a conductive rotating shaft 4 connected to the upper portion of the connecting member 3 and electrically supporting the roll P are rotatably mounted on the support base 2. A plurality of carbon terminals 6 are pressed against a disk-shaped conductive plate 5 fixed to the upper end of the rotating shaft 4 to energize while rotating a roll in a plating tank.

The carbon terminals 6 of the second means are formed in a block shape and are arranged radially on the upper surface of the conductive plate 5, and each of the carbon terminals 6 is energized and the carbon terminals 6 are connected to the conductive plate 5. The pressing body 7 to be pressed against the upper surface of the support frame 2 is mounted on the support base 2.

The pressing body 7 of the third means comprises a bracket 10 fixed to the support base 2 and a plurality of pressing springs 11 fixed to the bracket 10. Press.

Further, the rotation of the rotating shaft 4 of the fourth means by a motor 9 via a rotating gear 8 provided around the rotating shaft 4 is a means for solving the problem.

[0013]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Reference numeral 1 shown in the figure is a plating tank into which a roll P suspended vertically is immersed. A support base 2 for suspending the roll P, a connector 3, and a rotating shaft 4 are mounted above the plating tank 1 (see FIG. 1).

The support base 2 rotatably supports a rotating shaft 4 described later, and a motor 9 for rotating the rotating shaft 4 and the like are mounted on the support base 2 shown in the figure.

The rotating shaft 4 has a cylindrical shape for rotating the roll P while energizing the roll P. The rotating shaft 4 is made of a material having good conductivity such as a copper material. In order to prevent electric leakage to the support base 2 supporting the rotary shaft 4 when the roll P is energized from the rotary shaft 4, an insulator such as a bakelite material is provided on the rotary support between the rotary shaft 4 and the support base 2. Via 12.

The lower end of the rotating shaft 4 is connected to the roll P via the connecting body 3. The connecting body 3 includes a connecting jig 3A connected to the upper end of the roll P and a fixed body 3B fixed to the lower end of the rotating shaft 4. Then, by attaching / detaching the connection jig 3A connected to the roll P to / from the fixed body 3B, the rotating shaft 4 and the roll P are connected in a conductive state. The connection jig 3A in the illustrated example has a plate-like shape, and is provided with an insertion hole 3Aa for inserting the shaft P1 of the roll P, and a bolt insertion hole 3Ab for screwing to the end of the roll P. (See FIG. 3). On the other hand, the fixed body 3B is provided in a frame shape so that the shaft portion P1 inserted into the connection jig 3A does not hinder the connection between the connection jig 3A and the fixed body 3B (see FIG. 1). .

A rotating gear 8 connected to a motor 9 is provided around a substantially central portion of the rotating shaft 4. Then, by rotating the rotating gear 8, the roll P rotates together with the rotating shaft 4. The illustrated rotating gear 8 uses a bevel gear, and is rotated at a controlled speed by a geared motor 9.

A disc-shaped conductive plate 5 is fixed to the upper end of the rotating shaft 4. The conductive plate 5 is formed of a conductive material such as a copper plate and rotates with the rotating shaft 4. The upper surface of the conductive plate 5 is a contact point with the carbon terminal 6, and the rotating conductive plate 5 is energized while slidingly contacting the lower surface of the carbon terminal 6.

A plurality of carbon terminals 6 are arranged on the upper surface of conductive plate 5. The carbon terminals 6 are formed in a block shape and are radially arranged on the upper surface of the conductive plate 5 (see FIG. 2). In the embodiment, eight carbon terminals 6 having a length of 40 mm and a height of 50 mm are radially arranged on a copper conductive plate 5 having a diameter of 250 mm and a thickness of 20 mm. Further, a pressing body 7 for pressing and biasing the carbon terminals 6 is provided so that each carbon terminal 6 is in close contact with the conductive plate 5.

The pressing body 7 has a bracket 10 fixed to the support base 2, and a plurality of pressing springs 11 fixed to the bracket 10. The illustrated bracket 10 includes a fixing plate 10A on which a spring 11 is arranged, and an adjusting bolt portion 10B for connecting the fixing plate 10A to the support base 2 so as to be adjustable in height. A spring 11 is arranged on the lower surface of the fixed plate 10A, and the carbon terminal 6 is pressed and urged between the spring 11 and the carbon terminal 6 via a metal terminal 13 such as a copper plate (see FIG. 1). ).

Incidentally, in order to protect the carbon terminal 6 and the conductive plate 5, each may be covered with a cover or the like made of an insulating material (not shown).

The method of use of the present invention is such that a roll P is rotatably supported on a support base 2 mounted above the plating tank 1, and plating is performed while rotating the roll P in the plating tank 1. In this embodiment, the rotating shaft 4 and the roll P are rotated by the rotation of the motor 9 described in the above device, and at the same time, the cathode is connected to the roll P conducted through the carbon terminal 6 and the conducting plate 5 to connect the cathode. Is flowing.

[0023]

[Table 1] Table 1 shows the plating film thickness of each part when a roll P of FCD (spheroidized graphite cast iron) 300 φ × 1200 is plated by the device of the present invention. This data corresponds to the position of each part of the roll shown in FIG. According to this data, it is shown that the plating is formed with a film thickness with an accuracy within the range of 50 μm to 54 μm, and it is understood that an error of only about 4/1000 mm occurs.

[0024]

[Effect of the invention]

 The present invention achieves the original object by being configured as described above. That is, according to the first aspect, since the current is supplied while rotating the roll in the plating tank, plating of uniform and precise thickness in cylindricity and concentricity can be achieved. As a result, the precision polishing process required for uniform thickness in conventional hard chrome plating is no longer required, significantly shortening the time it takes to complete the product and significantly reducing manufacturing costs. Was successful.

Further, since the hydrogen gas is separated from the plating surface with the rotation of the roll P, generation of pinholes and the like can be prevented, and plating excellent in corrosion resistance can be performed.

Furthermore, the carbon terminal 6 and the pressing body 7 pressing the carbon terminal 6 according to the second and third aspects make it possible to energize the rotating roll P in a stable state for a long time.

The roll P can be rotated while securely supporting the roll P.

As described above, according to the present invention, plating with a uniform and precise thickness can be achieved, and a precision polishing step after plating is not required, so that the time required for completing a product is significantly reduced. It has various industrially beneficial effects such as significantly reducing manufacturing costs.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a plating apparatus of the present invention.

FIG. 2 is a bottom view showing the carbon terminal of the present invention.

FIG. 3 is a plan view showing the connection jig of the present invention.

FIGS. 4A and 4B are front views and FIGS. 4B and 4C are views showing rolls on which data shown in Table 1 are measured. FIGS.

[Explanation of symbols]

 P roll P1 Shaft part 1 Plating tank 2 Supporting gantry 3 Connecting body 3A Connection jig 3Aa insertion hole 3Ab Bolt insertion hole 3B Fixed body 4 Rotating shaft 5 Conductive plate 6 Carbon terminal 7 Pressing body 8 Rotating gear 9 Motor 10 Bracket 10A Fixed plate 10B Adjusting bolt part 11 Spring 12 Insulator 13 Metal terminal

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[Procedure amendment]

[Submission date] August 9, 1999 (1999.8.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 3

[Correction method] Change

[Correction contents]

Claims (4)

[Utility model registration claims] In a hard chrome plating apparatus, a plating tank for vertically dipping a roll is provided, a support base is mounted above the plating tank, and a connected body of a conductive material detachably connected to an upper end of the roll. A rotating shaft of a conductive material that is connected to the upper part of the connecting body and suspends and supports the roll is rotatably supported on a support base, and a plurality of disk-shaped conductive plates fixed to the upper end of the rotating shaft are provided. A hard chrome plating apparatus for vertical rolls, characterized in that a carbon terminal is pressed into contact and power is supplied while rotating a roll in a plating tank. 2. A pressing member which is formed in a block shape and is radially disposed on an upper surface of a conductive plate, and energizes each carbon terminal, and presses each carbon terminal against the upper surface of the conductive plate. Claim 1 mounted on a support base
A hard chrome plating apparatus for vertical rolls as described above. 3. The vertical body according to claim 1, wherein the pressing body comprises a bracket fixed to a support base, and a plurality of pressing springs fixed to the bracket, and each spring presses each carbon terminal. Hard chrome plating equipment for die rolls. 4. The hard chrome plating apparatus for a vertical roll according to claim 1, wherein the rotating shaft is rotated by a motor via a rotating gear provided around the rotating shaft.