Auxiliary tool for electroplating chromium in center hole of part

Abstract

The auxiliary tool comprises a hook, a conducting rod, a conducting support, a conformal anode, an insulating gasket and a fastener, the hook, the conducting rod and the conducting support are sequentially arranged from top to bottom, the conducting support is a U-shaped support with a downward opening, the conducting rod is vertically fixed to the center of the top of the conducting support, and the conformal anode is fixed to the top of the conducting support. The insulation gasket is horizontally installed at the open end of the conductive support, the pictographic anode is coaxially nested in a central through hole of the insulation gasket, and a part to be electroplated is coaxially installed below the insulation gasket, does not make contact with the pictographic anode and is connected with the conductive support through a fastener. And the outline of the conformal anode below the insulating gasket is consistent with the shape of the part center hole, so that the plating rate and plating uniformity of each electroplating surface of the part center hole are ensured. The electroplating device is simple in operation, high in efficiency and uniform and reliable in plating layer when being used for electroplating the center hole of the part.

Description

TECHNICAL FIELD

[0001] The utility model belongs to surface treatment technical field, concretely relates to a kind of auxiliary tool for part center hole chrome plating. BACKGROUND

[0002] Referring to Figure 1 A bearing seat has a center hole, and the bearing seat has a radial outwardly extending lug at one end, and the lug is symmetrically provided with a mounting through hole. When the bearing seat center inner surface appears slight scratch and wear and tear, the bearing seat can still be used normally, but when there is serious scratch and wear and tear, and the bearing matching surface roundness and cylindricity is greater than 0.015mm, it needs to be ground and re-chromed repaired, the bearing seat center hole inner wall and end face need to be thickened and plated with chromium, and the remaining surface is not allowed to have a chromium layer, and the finished product needs to be ground by a machine tool to ensure the shape and position tolerances of the product.

[0003] When traditional chromic anhydride plating solution is directly applied to the bearing seat, it is difficult to ensure the uniformity of the chromium plating layer, and since the inner diameter of the center hole of the bearing seat is generally The chromium plating area is large, the internal profile of the center hole is complex, and there are two chromium plating surfaces (the inner wall of the center hole and the end face) at the same time, it is difficult to deposit a chromium plating layer on the end face of the center hole during electroplating, and long-term electroplating is very prone to problems such as uneven thickness of the plating layer and local accumulation of the chromium layer. A Chinese patent with patent number 202221342095.1 discloses an end cover inner diameter chrome plating tool that can protect the non-electroplated surface while electroplating and repairing the inner wall of the inner hole, but the tool can only repair the inner wall of the inner hole and cannot simultaneously electroplate and repair the end face of the inner hole.

[0004] To realize electroplating repair of the two plating surfaces, the traditional operation method is to use copper wire binding as a part cathode conductive path to electroplate chromium on the two electroplated surfaces of the part in steps. After one electroplating, electroplatable paint or electrician's insulating tape is used to insulate and protect the already electroplated part, and then electroplating chromium on the other electroplated surface is performed. The preparation time required for the second electroplating protection is longer, and the plating layer stability is poor due to the influence of the shape of the part during the second electroplating. The internal current of the part concentrates at the sharp corner during electroplating, resulting in uneven deposition of the plating layer of the part. It has been verified through practice that long-term electroplating cannot achieve the required size, cannot meet the repair requirements of the bearing seat, and the finished product rate is low. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problems of complex process, uneven plating layer and not meeting repair requirements in the process of electroplating repair of the center hole of the bearing seat by traditional electroplating tool, and provides an auxiliary tool for chrome plating of the center hole of the part.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0007] An auxiliary tool for electroplating chromium on a center hole of a part, the part having a lug extending radially outward at one end, the lug having a mounting hole symmetrically arranged thereon; the auxiliary tool comprising a hook, a conductive rod, a conductive bracket, an anode, a first insulating pad, and a fastener;

[0008] The hook, the conductive rod, and the conductive bracket are arranged in sequence from top to bottom;

[0009] The conductive bracket is a U-shaped bracket with an opening facing downward, and the conductive rod is vertically fixed at the top center of the conductive bracket;

[0010] The first insulating pad is horizontally arranged at the opening end of the conductive bracket; the first insulating pad is provided with process holes coaxial with the two end portions of the opening end of the conductive bracket, respectively, and a center through hole coaxial with the conductive rod, and the anode is coaxially nested in the center through hole of the first insulating pad;

[0011] The part to be electroplated is coaxially arranged below the first insulating pad, and the mounting holes on the lugs of the part are fixedly connected to the two end portions of the conductive bracket through the fasteners, respectively;

[0012] The profile of the anode below the first insulating pad is consistent with the shape of the center hole of the part, and the anode does not contact the part to be electroplated.

[0013] Further, the anode comprises a first shaft and a second shaft connected coaxially from top to bottom, the second shaft is coaxially nested in the center through hole of the first insulating pad, and the diameter of the first shaft is greater than the inner diameter of the center through hole of the first insulating pad;

[0014] The outer profile and the inner hole profile of the second shaft are consistent with the shape of the center hole of the part.

[0015] Further, it further comprises a second insulating pad and a pressing assembly; the second insulating pad is coaxially fixed on the top surface of the first insulating pad, and the center through hole of the second insulating pad is matched with the first shaft of the anode;

[0016] The pressing assembly is located at the top of the second insulating pad and the anode, and is used to axially fix the second insulating pad and the anode.

[0017] Further, the top surface of the second insulating pad is flush with the top surface of the anode;

[0018] The pressing assembly comprises a pressing plate and an insulating bolt, and the pressing plate is located at the top of the first shaft of the anode and the second insulating pad;

[0019] The first shaft of the pictograph anode has a threaded hole matched with the insulating bolt, and the pressing plate is fixedly connected with the first shaft of the pictograph anode through the insulating bolt.

[0020] Further, the pressing assembly has two and is symmetrically arranged.

[0021] Further, the pictograph anode is made of lead-antimony alloy material and is insoluble anode in the electroplating process; the pictograph anode is connected with the anode of the power supply through a wire to provide an anode potential.

[0022] Further, the hook, the conductive rod and the conductive support are fixed by welding.

[0023] Further, the first insulating gasket and the second insulating gasket are made of polytetrafluoroethylene material.

[0024] The utility model discloses the advantages are:

[0025] 1. The utility model discloses a part center hole chrome electroplating auxiliary tool, including from top to bottom coaxial arrangement's hook, conductive rod, conductive support, pictograph anode and insulating gasket, pictograph anode coaxial nest in the center through -hole of insulating gasket, and the part of waiting for chrome plating is installed in the open end end of U type conductive support, and the pictograph anode lower segment outer contour is identical with the part of waiting for electroplating center hole contour, and the distance between part and anode is identical, and the power line is more evenly distributed on the plating surface when electroplating, and the problem of uneven chrome plating layer of each plating surface of part center hole is solved.

[0026] 2. When adopting the utility model discloses auxiliary tool and carries out electroplating operation, cancelled secondary electroplating protection procedure, and the chrome electroplating of all electroplating surfaces of part center hole can be completed in one electroplating operation, and the operation is simple and high in efficiency, and the manufacturing maintenance cost of enterprise is reduced.

[0027] 3. In the utility model, the coaxial arrangement between the parts avoids the uneven plating problem caused by the eccentricity of part hanging, and improves the part center hole electroplating repair quality.

[0028] 4. After adopting the utility model discloses auxiliary tool and electroplating, the size of center hole electroplating surface satisfies the requirement of later stage grinding allowance, and the finished product size of part after grinding satisfies the requirement. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the bearing seat schematic view in the utility model embodiment;

[0030] Figure 2 It is the structure schematic view of the part center hole chrome electroplating auxiliary tool embodiment one of the utility model;

[0031] Figure 3 It is Figure 2A schematic view of a long-term use worn-out pictograph anode structure;

[0032] Figure 4 A schematic view of a long-term use worn-out pictograph anode structure;

[0033] Figure 5 A schematic view of a long-term use worn-out pictograph anode structure;

[0034] In the figure: 1 - hook, 2 - electrically conductive rod, 3 - electrically conductive support, 4 - pictograph anode, 5 - insulating gasket, 6 - nut, 7 - terminal post, 8 - additional insulating gasket, 9 - compression assembly. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, which are exemplary and intended to explain the present application, and cannot be understood as a limitation of the present application.

[0036] Embodiment one

[0037] With reference to Figure 2 , the present embodiment takes a bearing seat as an example, and provides an auxiliary tool for electroplating chromium on a center hole of a part. The bearing seat has a support lug extending radially outward at one end, and the support lug is symmetrically provided with mounting holes. The auxiliary tool for electroplating chromium includes a hook 1, an electrically conductive rod 2, an electrically conductive support 3, a pictograph anode 4, an insulating gasket 5, and a nut 6. The hook 1, the electrically conductive rod 2, and the electrically conductive support 3 are sequentially arranged from top to bottom, and the hook 1 and the electrically conductive rod 2, and the electrically conductive rod 2 and the electrically conductive support 3 are fixed by welding. The electrically conductive support 3 is a U-shaped support with an opening facing downward, and the electrically conductive rod 2 is vertically fixed at the top center position of the U-shaped electrically conductive support. The U-shaped electrically conductive support 3 is rod-shaped, and the two end portions of the opening end of the electrically conductive support are provided with external threads.

[0038] The insulating gasket 5 is disc-shaped and horizontally arranged at the opening end of the electrically conductive support 3, and the insulating gasket is symmetrically provided with two process holes matched with the two end portions of the electrically conductive support 3. A center through hole coaxial with the electrically conductive rod 2 is further formed in the middle of the insulating gasket 5, and the pictograph anode is coaxially nested in the center through hole of the insulating gasket 5. The insulating gasket 5 is made of polytetrafluoroethylene material.

[0039] The bearing seat to be electroplated is coaxially arranged below the insulating gasket 5, and the two end portions of the electrically conductive support pass through the mounting holes in the support lug of the bearing seat, and the bearing seat and the electrically conductive support are fixedly connected by the nut 6, so as to realize the indirect connection between the bearing seat and the power supply cathode and provide the cathode potential. After installation, the bearing seat does not contact the pictograph anode located in the center hole thereof, and under the joint action of the insulating gasket 5, the bearing seat and the pictograph anode are insulated from each other, so as to avoid the problems such as electric shock of the part caused by short circuit of the circuit during the electroplating process.

[0040] With reference to Figure 3The icon-shaped anode 4 comprises coaxially connected first and second shafts from top to bottom, and has stepped through holes along its axis, with large holes in the second shaft and small holes in the first shaft. The second shaft is coaxially nested in the central through hole of the insulating liner 5, and the diameter of the first shaft is larger than the inner diameter of the central through hole of the insulating liner. The outer profile of the second shaft and the inner profile of the central hole thereof are consistent with the shape of the central hole of the bearing seat, so as to ensure the plating speed and uniformity of the plating layer of the end face and inner wall of the central hole during electroplating. The icon-shaped anode 4 has a vertically arranged terminal post 7 at the top thereof, which is used to connect the icon-shaped anode 4 with the anode of a power supply through a wire 7 to provide an anode potential. The icon-shaped anode 4 is made of lead-antimony alloy and is an insoluble anode during electroplating.

[0041] The conductive rod 2, the conductive support 3, the icon-shaped anode 4, the insulating liner 5 and the bearing seat to be electroplated are coaxially arranged, so as to avoid the problem of uneven plating layer caused by eccentricity during electroplating.

[0042] Embodiment two

[0043] Although the icon-shaped anode made of lead-antimony alloy is an insoluble anode during electroplating, the lead-antimony alloy has a soft texture, and long-term wear may cause the size of the icon-shaped anode to decrease, so that the icon-shaped anode cannot reliably cooperate with the insulating liner 5, and is prone to shaking or eccentricity, and there is a risk that the icon-shaped anode contacts the electroplated bearing cover or causes uneven plating layer. In order to avoid the foregoing problems, the embodiment further designs an additional insulating liner 8 and a pressing assembly 9. The additional insulating liner 8 is coaxially fixed to the top of the insulating liner 5, and the top surface of the additional insulating liner is flush with the top surface of the icon-shaped anode. The central through hole of the additional insulating liner is in shaft hole cooperation with the first shaft of the icon-shaped anode, so as to radially limit the icon-shaped anode. The pressing assembly 9 is installed on the top of the additional insulating liner 8 and the icon-shaped anode, and is used to axially press and fix the icon-shaped anode in the inner hole of the insulating liner 5 and the inner hole of the additional insulating liner 8. Specifically, the pressing assembly is two and is symmetrically arranged. The pressing assembly comprises a pressing plate and an insulating nut. The lower surface of the pressing plate is in contact with the top surface of the top of the additional insulating liner 8 and the icon-shaped anode, and the top of the icon-shaped anode is axially fixed with the pressing plate through the insulating nut.

[0044] Specifically, the additional insulating liner 8 is coaxially bonded and fixed with the insulating liner 5. The additional insulating liner 8 is made of polytetrafluoroethylene material.

[0045] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application.

Claims

1. An auxiliary tool for electroplating chromium in the center hole of a part, one end of the part having a radial outwardly extending lug, the lug having symmetrically arranged mounting through holes; characterized in that, The auxiliary tooling includes a hook, a conductive rod, a conductive support, an anode in the shape of an object, a first insulating gasket, and fasteners; The hook, the conductive rod, and the conductive support are arranged in sequence from top to bottom; The conductive support is a U-shaped support with an opening facing downward, and the conductive rod is vertically fixed at the top center of the conductive support; The first insulating gasket is horizontally arranged at the opening end of the conductive support, and the first insulating gasket is provided with process holes coaxial with the two end portions of the opening end of the conductive support, respectively, and is also provided with a center through hole coaxial with the conductive rod, and the anode in the shape of an object is coaxially nested in the center through hole of the first insulating gasket; The part to be electroplated is coaxially arranged below the first insulating gasket, and the mounting through holes on the part lugs are fixedly connected with the two end portions of the conductive support through the fasteners, respectively; The profile of the anode in the shape of an object below the first insulating gasket is consistent with the shape of the center hole of the part, and the anode in the shape of an object does not contact the part to be electroplated.

2. The jig for electroplating chromium into a center hole of a part according to claim 1, wherein The anode in the shape of an object includes a first shaft and a second shaft connected coaxially from top to bottom, the second shaft is coaxially nested in the center through hole of the first insulating gasket, and the diameter of the first shaft is greater than the inner diameter of the center through hole of the first insulating gasket; The outer profile and the inner hole profile of the second shaft are consistent with the shape of the center hole of the part.

3. The jig for electroplating chromium into a center hole of a part according to claim 2, wherein It also includes a second insulating gasket and a compression assembly; the second insulating gasket is coaxially fixed on the top surface of the first insulating gasket, and the center through hole of the second insulating gasket matches the first shaft of the anode in the shape of an object; The compression assembly is located at the top of the second insulating gasket and the anode in the shape of an object, and is used to axially fix the second insulating gasket and the anode in the shape of an object.

4. The jig for electroplating chromium into a center hole of a part according to claim 3, wherein The top surface of the second insulating gasket is flush with the top surface of the anode in the shape of an object; The compression assembly includes a pressing plate and an insulating bolt, and the pressing plate is located at the top of the first shaft of the anode in the shape of an object and the second insulating gasket; The first shaft of the anode in the shape of an object has a threaded hole matched with the insulating bolt, and the pressing plate is axially fixedly connected with the first shaft of the anode in the shape of an object through the insulating bolt.

5. The jig for electroplating chromium into a center hole of a part according to claim 4, wherein The compression assembly has two and is symmetrically arranged.

6. The jig for electroplating chromium into a center hole of a part according to any one of claims 1 to 5, wherein The anode in the shape of an object is made of lead-antimony alloy material and is insoluble in the electroplating process; the anode in the shape of an object and the anode of the power supply are connected through wires to provide anode potential.

7. The jig for electroplating chromium into a center hole of a part according to claim 6, wherein The hook, the conductive rod, and the conductive support are fixed by welding.

8. The jig for electroplating chromium into a center hole of a part according to claim 7, wherein The first insulating gasket and the second insulating gasket are made of polytetrafluoroethylene material.

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