JP5187673B1 - Metal cylindrical roller plating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plating apparatus capable of performing a hard chrome plating process on the circumferential surface of a metal cylindrical roller with a uniform thickness.
SOLUTION: Two anodes are provided facing each other in a plating tank in which a plating solution is stored and a metal cylindrical roller is immersed vertically and vertically in the plating solution. In order to make the entire circumferential surface of the metal cylindrical roller after plating have a uniform plating thickness, it is attached to both end faces of the metal cylindrical roller suspended vertically and vertically in the plating tank, A pair of connecting jigs are provided to energize a metal cylindrical roller as a cathode. A hanger is detachably bridged on the upper edge of the plating tank, and the hanger has a suspension mechanism for freely hanging the metal cylindrical roller and a drive mechanism for rotating the shaft center. Is provided.
[Selection] Figure 1

Description

  The present invention relates to a hard chrome plating process for a metal cylindrical roller (hereinafter referred to as a roller), and more specifically, plating of a roller capable of applying a uniform thickness to the circumferential surface of the roller. It relates to the device.

  The roller is widely used in textile machinery, printing machinery, film production equipment, liquid crystal production equipment, and the like. The rollers used in these apparatuses are required to have high surface accuracy because they affect product quality. For example, a roller used in a textile machine is finished so as to have high roundness and cylindricity by grinding a grindstone or the like after a hard chrome plating process is performed on the circumferential surface thereof.

When hard chrome plating is applied to the roller, current concentration of the plating current occurs at both ends of the roller and both ends of the circumferential surface. As a result, the hard chrome plating thicknesses at both ends and the circumferential surfaces of the both end surfaces and the circumferential surface are thicker than the circumferential surface intermediate portion as shown in FIG . The plating thicknesses at the both end surfaces and both ends of the circumferential surface are not only unnecessary, but increase the polishing time and cost due to grinding of the grindstone or the like. Furthermore, since metal scraps scraped by polishing are difficult to reuse in a plating plant, there is a problem that the amount of plating used and waste increase.

  As described above, in the hard chrome plating processing of the roller, a method of suppressing the plating thickness on the both end surfaces and both ends of the circumferential surface and performing a hard chrome plating processing on the circumferential surface to a uniform thickness is desired. . As a technique for suppressing the plating thickness on the roll end surface and the circumferential surface, for example, a pair of roll chucks for chucking both ends of a roll to be plated, a plating tank for storing a plating solution and immersing the roll in the plating solution, and the above plating A plating apparatus for rolls, comprising: a pair of plating current shields provided in a tank, facing each other so as to be externally fitted to the roll chuck, and suppressing concentration of plating currents on the roll ends. The belt is suspended so as to be movable in the axial direction of the roll chuck, and a roll end face covering plate that is externally fitted to the roll chuck, and a belt-like shape having a notch region standing on the opposite surface side of the roll end face covering plate A roll plating apparatus having a roll peripheral surface end covering plate is disclosed (see Patent Document 1).

  JP 2011-122233 A

  Although the roll plating apparatus can reduce the plating thickness at both ends of the roll circumferential surface by providing the roll end surface coating plate and the roll circumferential surface end coating plate, both ends of the roll circumferential surface still remain. In this roll plating apparatus, it is difficult to make the plating thickness at both ends of the circumferential surface uniform with the central portion of the circumferential surface.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a roller plating apparatus that can apply a hard chrome plating process to the circumferential surface of the roller to a uniform thickness. It is said.

  In order to solve the above-mentioned problems, a plating apparatus according to claim 1 of the present invention includes a plating bath for storing a plating solution and vertically immersing a roller in the plating solution, and at least two in the plating bath. A plurality of anodes are provided facing each other. Then, in order to make the entire circumferential surface of the roller after the hard chrome plating processing have a uniform plating thickness, that is, to be equal to or less than a predetermined roundness and cylindricity, it is perpendicular to the plating tank. A pair of connecting jigs composed of an upper lid and a lower lid are provided that are attached to both end faces of the roller suspended vertically and energize the roller as a cathode. A hanger is detachably bridged on the upper edge of the plating tank, and the hanger has a suspension mechanism that suspends the roller rotatably and a drive mechanism that rotates the roller around an axis. Is provided.

  Due to many years of experience by the inventor, the unevenness of the plating thickness when the roller is held horizontally in the plating solution and when it is held vertically is more uniform when the cylindrical roller is held vertically. Know that you can. In addition, by attaching a pair of connecting jigs composed of an upper lid and a lower lid to both end faces of the roller, it is possible to prevent plating adhesion to both end faces of the roller, and the circumferential surface of the roller Since the portions where the plating thickness is increased at both ends are connected to be the circumferential surfaces of the pair of connecting jigs, the circumferential surface of the roller should have a uniform plating thickness over the entire length in the axial direction. it can.

  In the plating apparatus according to claim 2 of the present invention, the connecting jig is formed in a predetermined length having a cylindrical portion having the same outer diameter as the roller, and mechanically connects the end surface of the connecting jig and the end surface of the roller. It is connected with a connection, for example, a bolt, a screw or a screw.

  By attaching a pair of connecting jigs composed of an upper lid and a lower lid to both end faces of the roller, plating adhesion to both end faces of the roller can be prevented, and both ends of the circumferential surface of the roller The portion where the plating thickness is increased becomes the circumferential surface of a pair of connecting jigs composed of an upper lid and a lower lid, and the circumferential surface of the roller can have a uniform plating thickness over the entire length in the axial direction.

The two hangers are attached to the hangers by insulating the central part of the plurality of long frames and the central part of the horizontal rotating shaft that are bridged in parallel with the upper edges on both sides of the plating tank with an insulating material. The shaft bearings are insulated. That is, it is provided on the long frame and the short frame that are provided opposite to the upper edge on the short side of the plating cage and intersect the imaginary line that connects the insulating members that divide the plating cage in the longitudinal direction by a straight line. The intersecting point of the horizontal rotating shafts is insulated by an insulating material. With such a configuration, since the two rollers suspended on the hanger are insulated, optimal electrical control can be performed for each roller. Thereby, the plating thickness of the circumferential surface of the roller can be made more uniform.

In the plating apparatus according to claim 2 of the present invention, the hanger can suspend a plurality of the rollers, and each of the rollers is provided with power supply means. Thereby, since each roller can perform optimal electric control with a rectifier for each roller according to the position immersed in the plating tank, the circumferential surface of the roller is more uniform over the entire axial length. It can be a plating thickness.

The plating apparatus according to claim 3 of the present invention can be used for a textile machine apparatus, a printing machine apparatus, a film manufacturing apparatus, or a liquid crystal manufacturing apparatus. According to this, the hard chromium plating process can be performed on the rollers for various uses.

  According to the roller plating apparatus of the present invention, by attaching a pair of connecting jigs composed of an upper lid and a lower lid to both end faces of the roller, it is possible to prevent plating from being attached to both end faces of the roller. In addition, the portion where the plating thickness is thick at both ends of the circumferential surface of the roller becomes the circumferential surface of the pair of connecting jigs, and the circumferential surface of the roller has a uniform plating thickness over the entire length in the axial direction. Can do. In addition, since the two bearings attached to the hanger are insulated, optimal electrical control is possible for each roller, and the plating thickness of the circumferential surface of the roller can be made more uniform. .

It is front sectional drawing of the plating apparatus which shows an example of embodiment of this invention. It is a top view of the plating apparatus which shows an example of embodiment of this invention. It is side surface sectional drawing of the plating apparatus which shows an example of embodiment of this invention. It is front sectional drawing of the connection jig which shows an example of embodiment of this invention. It is a front view of the hanger which shows an example of embodiment of this invention. It is a bearing bearing detail drawing of the plating apparatus which shows an example of embodiment of this invention. It is the electric power feeding part detail drawing of the plating apparatus which shows an example of embodiment of this invention. It is a front whole figure showing an example of an embodiment of plating equipment which has arranged a plating device of the present invention. It is a schematic diagram which shows the plating thickness in the circumferential surface of the roller plated by the plating apparatus of this invention. It is a schematic diagram which shows the plating thickness in the circumferential surface of the roller plated with the conventional plating apparatus.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3, the plating tank 1 is formed in a rectangular parallelepiped whose upper surface is opened so that the plating solution 2 can be stored and the roller R can be immersed vertically and vertically. The area and volume of the plating tank 1 are determined according to the number of the plating tanks 1 in which the roller R is immersed simultaneously. For example, the plating tank 1 can be used for four or six. Further, not only the plating tank 1 but also a pretreatment tank and a post-treatment tank can be connected to or integrally formed with the plating tank 1. The treatment by the pretreatment tank includes degreasing, water washing and pickling, and the treatment by the posttreatment tank includes water washing by shower and rust prevention treatment.

  As the plating solution 2 stored in the plating tank 1, a known solution for applying hard chrome plating is appropriately used. Although not shown, a plating solution supply tank for supplying the plating solution 2 can be separately connected to the plating tank 1 so that the amount and concentration of the plating solution 2 stored in the plating tank 1 can be kept constant. Depending on the change of the plating solution 2 in the tank 1, the plating solution 2 can be appropriately supplied. In addition, the density | concentration of the plating solution 2, etc. are suitably set according to the shape of the roller R, the voltage applied to the plating tank 1, the magnitude | size of an electric current, etc.

  As shown in FIGS. 1 to 3, at least two anodes 3 are provided in the plating tank 1 in the vicinity of the inner corners of the plating tank 1. Normally, in the Sargent bath used for hard chrome plating, the copper core of the anode 3 is pure copper, and the lead alloy components are, for example, 59% to 92% lead, 7 to 40% tin, antimony, 1% of trace components such as bismuth are contained. According to the plating tank 1, it is possible to flow a plating current between the anode 3 and the roller R serving as a cathode, and hard chrome plating can be applied to the roller R.

  In FIG. 4, a pair of connecting jigs 4 composed of an upper lid 41 and a lower lid 42 are coupled to both ends of the roller R. The connecting jig 4 has a uniform plating thickness over the entire circumferential surface of the roller R after the hard chrome plating process, that is, in order to have a predetermined roundness and cylindricity or less. It is combined with both end faces of the roller R suspended vertically and vertically in the plating solution of the plating tank 1. The upper lid 41 is connected to a substantially L-shaped cathode rod 5 used to suspend the roller R from a bearing portion 7 of a hanger 6 described later.

  The upper lid 41 is made of a conductive material such as iron and has a cylindrical shape with an outer diameter that is the same as the outer diameter of the roller R and a recess 43 that loosely inserts the boss portion of the roller R on one end surface. Has been. For the connection between the upper lid 41 and the roller R and the connection between the cathode rod 5 and the upper lid 41, bolts or small screws 44 are used. The lower lid 42 is made of the same material as the upper lid 41, has the same outer diameter as the outer diameter of the roller R, and has a columnar shape in which one end face is provided with a step 45 that is loosely inserted into the concave portion of the roller R. Is formed. For the connection between the lower lid 42 and the roller R, a bolt or a small screw 44 or the like is used. The lengths of the upper lid 41 and the lower lid 42 in the axial direction are set to optimum lengths corresponding to the outer diameter and the overall length of the roller R.

As another embodiment of the connecting jig in FIG. 4, although not shown, only the shape of the lower lid 42 can be different. The lower lid 42 is made of the same material as the upper lid 41 and has the same outer diameter as the outer diameter of the roller R. The lower lid 42 has a columnar shape in which one end face is provided with a step 45 that is loosely inserted into the concave portion of the roller R. Is formed. A disc having the same axis as the lower lid is formed on the other end surface. The disk may be formed integrally with the cylindrical part, but the disk may be formed in a donut shape and fixed to the cylindrical part by fitting or welding. For the connection between the lower lid 42 and the roller R, a bolt or a small screw 44 or the like is used. The length of the lower lid 42 in the axial direction and the position and diameter of the disc are set to the optimum dimensions corresponding to the outer diameter and the total length of the roller R. When the lower lid 42 has such a shape, the plating current is strongly attracted to the disk portion, so that the plating thickness on the circumferential surface of the roller R can be made more uniform.

In FIG. 5 , the main part of the hanger 6 is made of stainless steel, and is detachably bridged on the upper edge 11 of the plating tank 1 with two rollers R suspended, so that the hanger 6 is perpendicular to and perpendicular to the plating solution 2. It is immersed, and is composed of a frame body 61, a power transmission portion 65, a bearing portion 7, a power feeding portion 8, and the like. The frame 61 includes a plurality of long frames 62 that are bridged in parallel to the upper edges 11 on both sides of the plating tank 1, four short frames 63 that connect the long frames 62 in a perpendicular direction, and the length It is formed by four locking struts 64 erected from the end of the scale frame 62. That is, the intersection of the long frame and the horizontal rotation axis that are provided opposite to the upper edge of the short side of the plating cage and intersect the imaginary line that connects the insulating members that bisect the plating cage in the longitudinal direction by a straight line Is insulated by an insulating material. The middle portion of the long frame 62 is insulated by the insulating material 20. The locking strut 64 is detachably locked to the arm 91 of the cantilever carrier 9 shown in FIG.

  The power transmission unit 65 receives power from an endless chain T driven by a motor (not shown) installed on the side surface of the plating tank 1 and rotates the roller R. A motor is installed in the lower part of the side surface of the plating tank 1, and a chain sprocket 66 is rotatably mounted at predetermined positions on the output shaft of the motor, the middle part of the side surface of the plating tank 1, and the upper part of the side surface. An endless chain T is stretched on 66 and driven by a motor.

  On the short frame 63 of the hanger 6, a horizontal rotating shaft 67 whose middle portion is insulated by the insulating material 20 is supported by a plurality of bearings 68, and the horizontal rotating shaft 67 has a free end at the free end. A chain sprocket 69 that meshes with the endless chain T is rotatably attached. As shown in FIG. 7, two worms 78 are fitted at predetermined positions on the horizontal rotation shaft 67. The worm 78 meshes with a worm wheel 79 fitted to the upper end of a spindle 71 suspended from the bearing portion 7 to form a worm gear, and the spindle 71 is suspended in a central hole of the worm wheel 79 so as to be freely rotatable. Has been. An attachment flange 72 is connected to the lower end of the spindle 71 to lock the cathode bar 5 attached to the upper end of the roller R. In addition, electricity conducted from a power supply unit 8 to be described later is sent to a power supply metal fitting A74 and energized with a roller R connected to the spindle 71 via a power supply pulley 73 as a cathode.

In FIG. 6 , the bearing portion 7 is attached to a bearing mounting plate 75 that connects the long frames 62, and a spindle 71 with a bearing fitted thereon is rotatably supported on the bearing portion 7. . At the lower end of the spindle 71, an attachment flange 72 for fastening the cathode rod 5 attached to the upper part of the roller R is fastened.

In FIG. 7 , the power feeding unit 8 is provided in the vicinity of a position where four corners of the long frame 62 of the hanger 6 are detachably bridged to the upper edge 11 of the plating tank 1. The four power supply units 8 (two power supply units for one roller) are arranged. The electricity conducted from the power cable (not shown) to the power supply fitting C82 is sent to the power supply fitting A74 of the bearing 7 through the captyre cable 83, and the roller R passes through the power supply pulley 73, the spindle 71 and the cathode rod 5 from the power supply fitting A74. It is energized as a cathode. When the roller R is connected to the cathode, plating adheres to the surface of the roller R, and when the roller R is switched to the anode, the surface of the roller R can be cleaned by reverse electric treatment. .

In FIG. 8 , plating tanks 1 are installed on both sides, so that hangers 6 that can be detachably bridged on the upper surface edge 11 of the plating tanks 1 on both sides can be locked or removed at the middle part thereof. A cantilever carrier 9 that can move in the horizontal and vertical directions of the plating tank 1 is installed. A control panel 10 is controlled by connecting a rectifier for each roller R. Hereinafter, the operation of the plating apparatus of the present invention with reference to FIGS. 1 to 8.

  A connecting jig 4 composed of an upper lid 41 and a lower lid 42 is coupled to both ends of the roller R, and a substantially L-shaped cathode rod 5 is connected to the upper lid 41. The hanger 6 is locked to the cantilever carrier 9, and the cathode rod 5 connected to the roller R is locked to the two mounting flanges 72 of the hanger 6. The cantilever carrier 9 is moved up and horizontally moved by driving the motor M and immersed in a pretreatment tank provided in the plating tank 1 to perform pretreatment such as degreasing, water washing and pickling.

  The roller R that has been subjected to the pretreatment is carried by the cantilever carrier 9 while being suspended on the hanger 6, and is bridged at a predetermined position on the upper edge 11 of the plating tank 1. A power supply unit 8 is installed on the upper edge 11, and a connection terminal of a cabtire cable 83 provided on the power supply unit 8 is connected to a power supply fitting A 74 provided on the hanger 6. For example, when the number of plating treatments in the plating tank 1 is 6, six rollers R are immersed in the plating layer 1 by repeating the above operation three times.

  The six rollers R immersed in the plating tank 1 are connected as cathodes, but a reverse electric treatment is performed before the hard chrome plating. The reverse electric treatment is to perform electrolysis by changing the normal polarity. The roller R is switched from the cathode to the anode and anodized in the plating solution, and then the polarity is switched to the cathode. As a result, etching of the roller material and surface cleaning by the action of oxygen gas occur, and the adhesion of the plating film is improved. In addition, the reverse electric processing time is normally 10 to 20 seconds.

The hard chrome plating process is controlled by immersing the entire roller R in the plating solution and connecting one rectifier to each roller R. The rotation speed of the roller is adjusted by changing the traveling speed of the endless chain T. Optimum conditions for the roller can be set each time for the liquid temperature, voltage, current, plating time, etc. in the plating process. Thereby, as shown in FIG. 9 , uniform plating thickness can be given over the cylindrical surface full length of a roller.

  The six rollers plated under the above conditions had a plating thickness of 40-50 μm, a roundness of 3 μm or less, and a cylindricity of 5-10 μm. In addition, the measurement position of the roller R is four places, and the measurement instrument used the micrometer made from Mitutoyo Corporation. As described above, the roundness required for the roller R of 15 μm or less and the cylindrical degree of 10 μm or less are achieved only by the plating process, so that it is possible to greatly reduce the grinding time of the grinding stone after the plating process. It was. In addition, the amount of plating used and waste could be reduced.

  INDUSTRIAL APPLICABILITY The plating apparatus of the present invention is useful as a plating apparatus capable of performing plating on the circumferential surface of a metal cylindrical roller with a uniform thickness. Textile machine apparatus, printing machine apparatus, film manufacturing apparatus, and liquid crystal manufacturing It can be suitably used as an apparatus for plating a metal cylindrical roller such as an apparatus.

DESCRIPTION OF SYMBOLS 1 Plating tank, 11 Upper edge, 2 Plating liquid, 3 Anode, 4 Connecting jig 41 Upper lid, 42 Lower lid, 43 Recessed part, 44 Bolt or small screw 45 Step part, 5 Cathode rod, 6 Hanger, 61 Frame, 62 Long frame 63 Short frame, 64 Locking strut, 65 Power transmission part 66, 69 Chain sprocket, 67 Horizontal rotating shaft, 68 Bearing 7 Bearing part, 71 Spindle, 72 Mounting flange, 73 Feeding pulley 74 Feeding bracket A, 75 Bearing Mounting plate, 8 power supply section, 82 power supply bracket C
83 Captyre cable, 9 Cantilever carrier, 91 Arm 10 Control panel, 20 Insulation material, M motor, T endless chain R roller (metal cylindrical roller)

Claims (3)

A plating tank for storing a plating solution and vertically and vertically immersing a metal cylindrical roller in the plating solution, a plurality of anodes provided in the plating tank, and the metal cylindrical roller after the plating process Is attached to both end faces of the metal cylindrical roller that is suspended vertically and vertically in the plating tank so that the roundness and the cylindricity are less than or equal to a predetermined roundness and cylindricity. It consists of a pair of connecting jigs composed of an upper lid and a lower lid, energized with a roller as a cathode, and a hanger detachably bridged on the upper edge of the plating tank,
The hanger includes a suspension mechanism that suspends the metal cylindrical roller rotatably, and a drive mechanism that rotates the metal cylindrical roller about an axis .
The frame constituting the hanger includes a plurality of long frames that are bridged in parallel with the upper edges of both sides of the plating tank, four short frames that connect the long frames at right angles, and the long frames. Insulation that is formed with four locking struts erected from the end of the frame, is opposed to the upper edge on the short side of the plating rod, and insulates the plating rod in half in the longitudinal direction An apparatus for plating a cylindrical metal roller, characterized in that an intersection of a long frame intersecting a virtual line connecting members with a straight line and a horizontal rotation axis provided on the short frame is insulated by an insulating material .   The hanger can suspend a plurality of the metallic cylindrical rollers, each of the metallic cylindrical rollers is provided with a power supply means, and each is electrically controlled independently. The metal cylindrical roller plating apparatus according to claim 1.   The said cylindrical roller is used for a textile machine apparatus, a printing machine apparatus, a film manufacturing apparatus, or a liquid crystal manufacturing apparatus, The metal cylindrical roller plating apparatus of Claim 1-2 characterized by the above-mentioned.

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