CN216738609U - Clamp for electroplating tool - Google Patents
Clamp for electroplating tool Download PDFInfo
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- CN216738609U CN216738609U CN202122310100.2U CN202122310100U CN216738609U CN 216738609 U CN216738609 U CN 216738609U CN 202122310100 U CN202122310100 U CN 202122310100U CN 216738609 U CN216738609 U CN 216738609U
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- tool
- electroplating
- binding clip
- cathode
- guide rod
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Abstract
The utility model relates to the technical field of tools for electroplating, and discloses a clamp for electroplating a tool with a plane part, a concave part and a tip part, which comprises an electroplating frame and a cathode guide rod electrically connected with a power supply cathode, wherein the electroplating frame is also provided with an inert auxiliary anode and an inert auxiliary cathode; when the tool is secured to the fixture, the inert auxiliary anode extends into the concave portion of the tool and the inert auxiliary cathode is disposed adjacent the tip portion. The clamp can meet the requirement of uniform current distribution on the surface of a tool with a concave surface part, a plane part and a tip part, such as a handheld clamp, enhance the covering capability of a coating, and reduce or avoid the phenomena of 'scorching' at the tip end and 'yellow leakage' at a groove of the tool, thereby improving the success rate of primary electroplating, and achieving the effects of improving the quality of a plated part and reducing the cost of secondary chromium plating.
Description
Technical Field
The utility model relates to the technical field of tools for electroplating, in particular to a clamp for electroplating a tool.
Background
The hand-held pliers are tools with a plane part, a concave part and a tip part, and are used for clamping and fixing a processing workpiece or hand tools for twisting, bending and cutting off a metal wire. The hand-held pliers are V-shaped, generally comprise two parts of a handle and a pliers head (a pliers cheek and a pliers mouth), wherein the pliers mouth comprises a jaw, a tooth mouth, a knife edge and two hand-cut mouths, the tip part is positioned at the front end of the pliers head, the plane part is positioned on the side face of the pliers head, the concave part is mainly a groove on the side face of the knife edge of the pliers mouth and is adjacent to the knife edge, and the common types of the hand-held pliers comprise a vice, a sharp-nose pliers, an inclined-nose pliers and the like. The preparation process comprises the working procedures of forging, milling, heat treatment, polishing, electroplating and the like. The electroplating is mainly to plate metal protective layers such as nickel layers and chromium layers on the surfaces of the handheld pliers, so that the corrosion resistance of the pliers is enhanced, certain gloss is given to the handheld pliers, and the attractiveness of the handheld pliers is enhanced.
However, tools having a flat surface, a concave surface and a tip end, including hand-held pliers, are prone to have uneven coating thickness during electroplating, and even have undesirable phenomena such as "scorching" or "yellow leakage". Taking a vice or a sharp-nose pliers as an example, the pliers mouth mainly comprises a jaw, a tooth opening, a knife edge and a hand hay cutter opening, wherein the knife edge is deeply concave on the side surface of the pliers mouth to form a groove, the jaw is used for clamping an object, the tooth opening is used for twisting a screw and the like, and the knife edge and the hand hay cutter opening are used for shearing. The front end plating layer of the jaw is easy to be too thick and even burnt, the plating layer at the groove of the knife edge is easy to be thinned and even to be leaked with yellow, namely, no plating layer exists, and the pliers with the yellow leakage need to be plated for the second time, so that the processing quality and the production efficiency of the pliers are influenced.
Chinese patent CN202671693, the patent name "special hanger is electroplated to small spanner", discloses a hanger of electroplating usefulness to small spanner, this hanger includes the bracing piece, be equipped with electrically conductive copper wire and lower electrically conductive copper wire on the bracing piece, during electroplating, it is connected with the gyro wheel of small spanner to go up electrically conductive copper wire, lower electrically conductive copper wire and the handheld end connection of small spanner form closed circuit like this, guarantee electrically conductive leakproofness, and then reduce the chromium plating and leak yellow phenomenon, but this hanger is not suitable for the binding clip.
SUMMERY OF THE UTILITY MODEL
Aiming at the phenomenon that the plating layer of the electroplating of the tool is easy to be thin at the concave part and even to generate 'yellow leakage', the utility model aims to provide a clamp for electroplating of the tool, which can effectively thicken the plating layer of the deep concave part of the tool and avoid the phenomenon of 'yellow leakage'.
The utility model provides the following technical scheme:
a fixture for electroplating a tool comprises a plane part, a concave part and a tip part, and comprises an electroplating frame and a cathode guide rod electrically connected with a negative electrode of a power supply, wherein the cathode guide rod is arranged on the electroplating frame, an auxiliary anode guide rod with an insulating layer coated on the surface is further arranged on the electroplating frame, the auxiliary anode guide rod is electrically connected with a positive electrode of the power supply, and an inert auxiliary anode is arranged on the auxiliary anode guide rod;
when the tool is secured to the fixture, the inert auxiliary anode extends into the concave portion of the tool.
The existing research shows that factors causing the electroplating scorching or yellow leakage are various and mainly comprise electrolyte components, pH value and the like. Further, the inventors have studied and found that, in addition to the electrolytic solution components such as additives and the like, the distribution of the current density and the plating thickness is not uniform on a flat cathode having a distance equal to the anode, although the anode and the cathode are placed in parallel and opposed to each other, in the case of plating a tool having a flat surface portion, a concave surface portion and a tip portion, such as a hand-held pliers, and on the one hand, the electric line of force is easily concentrated at a position having a large curvature such as a sharp corner, an edge and the like of a part due to the edge effect of the current, and the current density is relatively large, so that the plating thickness is larger than the average thickness; and the curvature of the middle part of the surface is smaller, so that the power lines are less distributed, the current density is small, and the thickness of the plating layer is smaller than the average thickness. On the other hand, the pliers tool has a concave surface part, so that the distances between the concave surface part and the anode are different from each other, and the resistances between the concave surface part and the anode are different from each other, so that the distribution of current at the concave-convex part is different, the convex part is close to the cathode, the resistance is small, the current density is high, and the plating layer is thick; on the contrary, the plating in the recesses is thin. Aiming at the current distribution of the concave surface part of the tool, the inventor adds an inert auxiliary anode at the concave surface part, utilizes the inert auxiliary anode to increase the current efficiency of a low current area of a workpiece, enhances the covering capability and the dispersing capability of a deep concave coating and obviously improves, further enhances the thickness of the coating, and reduces or even avoids the occurrence of yellow leakage.
Preferably, the fixture further comprises an auxiliary cathode guide rod, the auxiliary cathode guide rod is electrically connected with the power supply cathode, the surface of the auxiliary cathode guide rod is coated with an insulating layer, an inert auxiliary cathode is arranged on the auxiliary electrode guide rod, and when the tool is fixed on the fixture, the inert auxiliary cathode is adjacent to the tip. The inert auxiliary cathode is arranged to change a power line, weaken the current effect of the tip, play a role in assisting the uniform electroplating in cooperation with the inert auxiliary anode, and reduce the phenomenon of scorching.
Preferably, the fixture is further provided with limiting parts for fixing tools, and the limiting parts are distributed on the upper side and the lower side of the cathode guide rod.
Preferably, the stopper is a hook.
Preferably, the top of the electroplating rack is provided with an electroplating rack hook.
Preferably, the tool is a handheld pliers, the handheld pliers comprises a binding clip, the binding clip comprises an upper binding clip and a lower binding clip, a binding clip mouth is formed between the upper binding clip and the lower binding clip, the tip part is arranged at the front end of the binding clip, the flat part is a side surface of the binding clip, the concave part is a groove part which is formed by recessing the side surfaces of the upper binding clip and the lower binding clip adjacent to the binding clip mouth and can be opened and closed along with the binding clip mouth, and the front end of the inert auxiliary anode is positioned in the groove part. The electroplating effect of the flat side of the pliers mouth is prevented from being influenced after the inert auxiliary anode extends out of the groove part.
Preferably, the inert auxiliary anode comprises a base section extending into the forceps mouth and an expansion section extending into the groove part, and the base section and the expansion section are connected in a smooth transition mode. The space of the groove part is larger than that of the knife edge when the pliers mouth is opened, and the requirement of uniform electroplating is met by adjusting the shape of the inert auxiliary anode.
Preferably, the cross sections of the base section and the expansion section are in inverted isosceles triangle shapes, and the vertexes of the triangles are in arc transition. When the forceps mouth is opened, the forceps mouth is in a V shape, so that the isosceles triangle-shaped base section and the isosceles triangle-shaped expansion section are matched with the forceps mouth.
Preferably, the expansion section is formed by surrounding a plurality of electrode thin rods which extend out of the base section and are uniformly distributed along the outer edge of the base section. Utilize many electrodes pin to provide more even electric field, avoid taking place local current too big phenomenon in the concave part.
In the present invention, the inert auxiliary electrode is preferably made of platinum or iridium. The inert auxiliary anode and the inert auxiliary cathode can be made of common inert electrode materials.
The utility model has the following beneficial effects:
the clamp can meet the requirement of uniform current distribution on the surface of a tool with a plane part, a concave part and a tip part, such as a handheld clamp, enhance the covering capability of a coating, and reduce or avoid the phenomena of 'scorching' at the tip end and 'yellow leakage' at the concave part of the tool, thereby improving the success rate of primary electroplating, and achieving the effects of improving the quality of a plated part and reducing the cost of secondary chromium plating.
Drawings
Fig. 1 is a structural view of the clip of the present invention.
Fig. 2 is a structural view of an inert auxiliary anode.
Fig. 3 is a cross-sectional view of the inert auxiliary anode of fig. 2 at a-a.
Fig. 4 is a cross-sectional view of the inert auxiliary anode of fig. 2 at B-B.
Fig. 5 is a structural view of another implementation of an inert auxiliary anode.
In the figure, 1, a plating frame, 11, a hook, 12, a hook frame, 13, a hook, 2, a cathode guide rod, 21, an auxiliary cathode guide rod, 22, an inert auxiliary cathode, 3, an auxiliary anode guide rod, 31, an inert auxiliary anode, 311, a base section, 312, an expansion section, 313, an electrode thin rod, 32, an auxiliary anode lead, 4, a vice, 41, a vice mouth, 42, a knife edge, 43, a groove part, 44 and a handle.
Detailed Description
The following further describes the embodiments of the present invention.
In the following embodiments, the tool to be plated is exemplified as a hand-held pliers.
Example 1
As shown in figure 1, the clamp for electroplating by using the handheld pliers as a vice 4 is described by taking the handheld pliers as an example, a vice jaw 41 consists of a jaw, a tooth opening, a knife edge 42 and a hand-cut opening, a groove part 43 is arranged on the side surface of the knife edge and is connected with the knife edge and is a main part which is easy to generate 'yellow leakage' during electroplating, and the front end of the jaw is a main part which is easy to generate scorching during electroplating. In order to solve the phenomenon, the clamp is provided with a rectangular frame-shaped electroplating frame 1, the upper end of the electroplating frame is provided with a hook 11 used for hanging the electroplating frame on an electrolytic cell, the electroplating frame is provided with a cathode guide rod 2, the cathode guide rod is horizontally arranged and is electrically connected with a power supply cathode through a lead, the cathode guide rod is provided with a hook frame 12, the hook frames are arranged on the upper side and the lower side of the cathode guide rod, each hook frame is provided with two hooks 13 used for fixing a handle 44 of a vice, the distance between the two hooks on the upper side is smaller than that between the two hooks on the lower side, the surface of the cathode guide rod is coated with an insulating layer, and the hooks are conductive pieces and are electrically connected with the cathode guide rod. An auxiliary anode guide rod 3 parallel to the cathode guide rod is further arranged on the electroplating frame, the auxiliary anode guide rod is connected with the positive electrode of the power supply through an auxiliary anode lead 32, the surface of the auxiliary anode guide rod is coated with an insulating layer, a conductive inert auxiliary anode 31 is arranged on the auxiliary anode guide rod, the inert auxiliary anode is in a conical column shape, the front end of the inert auxiliary anode is thin, the tail end of the inert auxiliary anode connected with the auxiliary anode guide rod is thick, the inert auxiliary anode is made of iridium, when a vice is fixed on the electroplating frame, the vice mouth is opened, and the inert auxiliary anode penetrates into the knife edge from the other side face of the vice head and extends into the concave groove part.
In order to eliminate the phenomenon of scorching at the front end of the clamp nozzle, the clamp further comprises an auxiliary cathode guide rod 21, the auxiliary cathode guide rod is arranged in parallel with the cathode guide rod and is connected with the cathode guide rod through a conducting rod, an insulating layer is coated on the surface of the auxiliary cathode guide rod, an inert auxiliary cathode 22 is arranged on the auxiliary electrode guide rod and is made of platinum and is in a conical column shape, the front end is thin, the tail end connected with the auxiliary cathode guide rod is thick, and when the clamp nozzle is opened, the inert auxiliary cathode extends into the clamp nozzle and is arranged close to the front end of the clamp nozzle.
The clamp of the utility model has the following use process:
the method comprises the steps that a vice to be electroplated is installed on an electroplating frame, wherein a handle of the vice is opened and is clamped by clamping hooks on the upper side and the lower side of a cathode guide rod respectively, a vice mouth of the vice is correspondingly opened, an inert auxiliary cathode extends into a vice mouth of the vice mouth and is close to the front end of the vice mouth, an inert auxiliary anode penetrates into a knife edge of the vice mouth from the side surface of the vice and extends into a groove portion of the knife edge, a basic section is located at the knife edge, an expansion section extends into the groove portion, the electroplating frame is vertically hung on an electrolytic cell, the groove portion of the vice is opposite to an anode of the electrolytic cell, a negative electrode of a power supply is electrically connected with the cathode guide rod, the inert auxiliary cathode is connected, an anode of the power supply is electrically connected with an auxiliary anode guide rod, and the inert auxiliary anode is connected for electroplating.
Example 2
As shown in figure 1, a clamp for electroplating handheld pliers is different from that of embodiment 1 in that, in order to ensure the supplementary effect of an inert auxiliary anode, as shown in figure 2, the inert auxiliary anode comprises two sections, one section is a basic section 311 connected with an auxiliary anode guide rod, the other section is an expansion section 312 extending forwards from the basic section, the cross section of the expansion section is larger than that of the basic section, when the inert auxiliary anode penetrates into a knife edge from the other side surface of a pliers head and extends into a groove part, the basic section is positioned in the knife edge, the expansion section is positioned in the groove part, and the basic section and the expansion section are connected in a smooth transition mode. As shown in figures 3 and 4, in order to match the V-shaped shape of the opened forceps mouth, the cross sections of the base section and the expansion section are in inverted isosceles triangle shapes, the vertexes of the triangles are in arc transition, and the small-angle vertexes of the isosceles triangle cross sections of the base section and the expansion section face the vertex of the V-shaped opening of the forceps mouth. Of course, the shape of the notch for the recessed portion of the vise is generally elliptical, and the cross section of the expansion section may be made elliptical.
Example 3
Referring to fig. 1, a clamp for electroplating with handheld pliers is different from embodiment 2 in that, as shown in fig. 5, an expansion section of an inert auxiliary anode is formed by uniformly distributing and enclosing a plurality of electrode thin rods 313 extending from a base section along the outer edge of the base section, wherein the base section is cylindrical to provide more uniform electric field distribution.
Claims (10)
1. A clamp for electroplating a tool, wherein the tool comprises a plane part, a concave part and a tip part, the clamp comprises an electroplating frame and a cathode guide rod electrically connected with a power supply cathode, and is characterized in that,
the cathode guide rod is arranged on an electroplating frame, an auxiliary anode guide rod with an insulating layer coated on the surface is further arranged on the electroplating frame, the auxiliary anode guide rod is electrically connected with a power supply positive electrode, and an inert auxiliary anode is arranged on the auxiliary anode guide rod;
when the tool is secured to the fixture, the inert auxiliary anode extends into the concave portion of the tool.
2. A jig for electroplating a tool according to claim 1, further comprising an auxiliary cathode guide electrically connected to the negative electrode of the power supply, wherein the surface of the auxiliary cathode guide is coated with an insulating layer, and an inert auxiliary cathode is provided on the auxiliary cathode guide, wherein the inert auxiliary cathode abuts the tip portion when the tool is mounted on the jig.
3. A jig for electroplating a tool according to claim 1, wherein the jig is further provided with a limiting part for fixing the tool, and the limiting part is distributed on the upper and lower sides of the cathode guide rod.
4. A jig for electroplating a tool according to claim 3, wherein the position-limiting portion is a hook.
5. The jig for electroplating a tool as claimed in claim 1, wherein the plating rack has a plating rack hook at the top.
6. The tool-plating jig according to claim 1, wherein the tool is a hand-held pliers, the hand-held pliers comprise a binding clip, the binding clip comprises an upper binding clip and a lower binding clip, a binding clip is formed between the upper binding clip and the lower binding clip, the tip portion is arranged at the front end of the binding clip, the flat portion is a side surface of the binding clip, the concave portion is a concave portion which is obtained by recessing the side surfaces of the upper binding clip and the lower binding clip adjacent to the binding clip and can be opened and closed along with the binding clip, and the front end of the inert auxiliary anode is located in the concave portion.
7. The tool plating fixture of claim 6, wherein the inert auxiliary anode includes a base section extending into the jaw and an expansion section extending into the recess, the base section and the expansion section being joined in a smooth transition.
8. The tool plating jig of claim 7 wherein the base section and the expansion section are each in the shape of an inverted isosceles triangle in cross section with the apex of the triangle in the arc transition.
9. A tool plating jig according to claim 7 wherein the expansion section is defined by a plurality of electrode pins extending from the base section and being evenly spaced around the periphery of the base section.
10. A tool plating jig according to any one of claims 1 to 9, wherein the inert auxiliary electrode is made of platinum or iridium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122310100.2U CN216738609U (en) | 2021-09-22 | 2021-09-22 | Clamp for electroplating tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122310100.2U CN216738609U (en) | 2021-09-22 | 2021-09-22 | Clamp for electroplating tool |
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| Publication Number | Publication Date |
|---|---|
| CN216738609U true CN216738609U (en) | 2022-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122310100.2U Active CN216738609U (en) | 2021-09-22 | 2021-09-22 | Clamp for electroplating tool |
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| Country | Link |
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| CN (1) | CN216738609U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957511A (en) * | 2021-09-22 | 2022-01-21 | 杭州巨星科技股份有限公司 | Fixture for electroplating tool and electroplating method |
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2021
- 2021-09-22 CN CN202122310100.2U patent/CN216738609U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113957511A (en) * | 2021-09-22 | 2022-01-21 | 杭州巨星科技股份有限公司 | Fixture for electroplating tool and electroplating method |
| CN113957511B (en) * | 2021-09-22 | 2023-07-21 | 杭州巨星科技股份有限公司 | Clamp for electroplating tool and electroplating method |
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