阅读说明：本技术 一种电铸金属圆管用挂具 (Hanging tool for electroforming metal round pipe ) 是由 周涛 明平美 王日鑫 闫亮 李真明 秦歌 郑兴帅 牛屾 于 2020-06-30 设计创作，主要内容包括：本发明专利公开了一种电铸金属圆管用挂具,属于电铸加工领域。该挂具主要包括上固定座、下固定座、引电单元、圆筒状钛网、联接杆、芯模；所述的上固定座包括上底座、轴承Ⅰ、内齿轮套；所述的下固定座包括下底座、轴承Ⅱ、导向柱；所述的引电单元包括引电架、引电轴承、引电杆、惰轮。本发明可协同提高芯模表面流场与电场分布均匀性,使得电铸层厚度分布均匀性好。本发明中的圆筒状钛网与芯模可做相对反向旋转运动,加强了对芯模附近电解液的搅拌,电铸速度更快。此外,强烈的搅拌可对芯模表面可能产生的气泡产生有效的驱离作用,使得电铸金属圆管表面质量好,良品率高。(The invention discloses a hanger for electroforming a metal round pipe, and belongs to the field of electroforming processing. The hanger mainly comprises an upper fixed seat, a lower fixed seat, an electricity leading unit, a cylindrical titanium net, a connecting rod and a core mold; the upper fixing seat comprises an upper base, a bearing I and an inner gear sleeve; the lower fixed seat comprises a lower base, a bearing II and a guide post; the electricity leading unit comprises an electricity leading frame, an electricity leading bearing, an electricity leading rod and an idler wheel. The invention can synergistically improve the distribution uniformity of the flow field and the electric field on the surface of the core mould, so that the thickness distribution uniformity of the electroforming layer is good. The cylindrical titanium mesh and the core mold can perform relative reverse rotation movement, so that the stirring of electrolyte near the core mold is enhanced, and the electroforming speed is higher. In addition, the strong stirring can generate effective driving-off action on bubbles possibly generated on the surface of the core mould, so that the surface quality of the electroformed metal round pipe is good, and the yield is high.)

1. A hanger for electroforming a metal round pipe is characterized in that: the device comprises an upper fixed seat (1), a lower fixed seat (2), an electricity leading unit (3), a cylindrical titanium net (4), a connecting rod (5) and a core mold (6); the upper fixing seat (1) comprises an upper base (1-1), a bearing I (1-2) and an internal gear sleeve (1-3); the lower fixed seat (2) comprises a lower base (2-1), a bearing II (2-2) and a guide post (2-3); the electric lead unit (3) comprises an electric lead frame (3-1), an electric lead bearing (3-2), an electric lead rod (3-3) and an idler wheel (3-4); a through hole I (1-1-1) is formed in the center of the upper base (1-1), and positioning holes (1-1-2) are symmetrically formed in two sides of the upper base; the inner gear sleeve (1-3) is tubular, and the inner wall of the inner gear sleeve is provided with gear teeth (1-3-1); the lower base (2-1) is provided with an annular boss (2-1-1); a through hole II (3-1-1) is formed in the center of the electricity leading frame (3-1), and positioning columns (3-1-3) are symmetrically arranged on two sides of the electricity leading frame; the middle part of the power lead rod (3-3) is provided with a gear (3-3-1), and the lower part of the power lead rod is provided with a threaded section (3-3-2); the upper section of the core mould (6) is provided with an internal threaded hole (6-1), and the lower section is provided with a guide hole (6-2); the upper base (1-1) and the lower base (2-1) are fixedly connected together in parallel and opposite to each other through 4 uniformly distributed connecting rods (5); the internal gear sleeve (1-3) is rotatably arranged in the through hole I (1-1-1) through a bearing I (1-2); the guide post (2-3) is rotatably arranged at the center of the annular boss (2-1-1); the positioning column (3-1-3) is arranged in the positioning hole (1-1-2) in a matching way; the lead rod (3-3) is rotatably arranged in the through hole II (3-1-1) through a lead bearing (3-2); the idle wheel (3-4) is rotatably arranged on the lead frame (3-1) and is simultaneously meshed with the gear (3-3-1) and the gear teeth (1-3-1); the internal thread hole (6-1) is connected with the thread section (3-3-2) in a matching way, and the guide hole (6-2) is connected with the guide post (2-3) in a matching way; one end of the cylindrical titanium net (4) is fixedly matched and connected with the inner gear sleeve (1-3), and the other end of the cylindrical titanium net is rotatably matched and installed with the outer surface of the annular boss (2-1-1) through a bearing II (2-2); the cylindrical titanium mesh (4) is coaxial with the core mold (6), and the distance between the inner surface of the cylindrical titanium mesh and the surface of the core mold (6) is 1-5 mm.

2. The hanger for electroforming a metal round tube according to claim 1, wherein: the electric lead frame (3-1) is provided with an electric lead column (3-1-2).

3. The hanger for electroforming a metal round tube according to claim 1, wherein: the bearing I (1-2) and the bearing II (2-2) are both made of acid and alkali corrosion resistant nylon.

4. The hanger for electroforming a metal round tube according to claim 1, wherein: the material grade of the cylindrical titanium net (4) is TA1, and the mesh number is 5-40.

Technical Field

The invention belongs to the field of electroforming processing, and particularly relates to a hanger for an electroformed metal round pipe.

Background

The electroforming technology is a technology for electrochemically depositing metal with a certain thickness on the surface of a cathode and separating the metal deposition layer from the cathode so as to obtain a metal product with a specific function. Since the electroforming technique has many advantages such as high processing accuracy (high replication accuracy) and low processing cost, it has been widely used in many fields such as aerospace, precision machinery, and plastic molds in recent years.

The uniformity of the thickness distribution of the electroformed layer is one of the important criteria for electroforming technology. The existing research shows that the main factor influencing the thickness distribution uniformity of the electroformed layer is the flow field and electric field distribution on the surface of the cathode. In practical application, the uniformity of the flow field and the electric field distribution on the surface of the cathode is not ideal, so that the thickness distribution of the electroforming layer is not uniform (the thickness difference is generally more than 20%), which restricts the effective exertion of the performance of the electroforming product to a certain extent.

The patent with the application number of 201822146030.X discloses a slender shaft part electroplating tool, and the device guarantees the consistency of the potential difference of the outer surface of a shaft part through arranging a shaft sleeve coaxial with the shaft part so as to ensure the consistency of the thickness of an electroplated layer of the shaft part. Because the shaft sleeve and the shaft part are relatively static, and the electrolyte flow strength of the opposite position of the communicating area on the coaxial sleeve on the surface of the shaft part is stronger than that of the other positions, relatively uniform flow field distribution on the surface of the shaft part is difficult to obtain, so that the thickness distribution uniformity of an electroplated layer is not ideal. In addition, air bubbles may be attached to the surface of the shaft part at a position where the electrolyte has a weak current strength, so that a pinhole defect may be generated on the surface of the shaft part. The invention patent with application number 201910347052.9 discloses a device for electrodepositing a thin-wall seamless circular tube, which presses flexible cilia on the surface of a round rod-shaped cathode (core mold) and enables the flexible cilia and the round rod-shaped cathode to generate relative motion so as to obtain an electroforming layer with ideal thickness distribution uniformity. Although the device can obtain relatively uniform flow field distribution on the surface of the core mould to a certain extent, the device has no obvious positive effect on improving the electric field distribution uniformity on the surface of the core mould, and the thickness distribution uniformity of the electroformed layer is not ideal. Therefore, it is necessary to develop a device that can synergistically improve the uniformity of the flow field and the electric field distribution on the surface of the mandrel, so as to better solve the problem of the uniformity of the thickness of the electroformed layer.

Disclosure of Invention

The invention aims to provide a hanger for electroforming a metal round pipe, which solves the problems mentioned above.

In order to achieve the purpose, the technical scheme of the invention is as follows: a kind of electroforming metal round pipe hanger, it includes upper fixed seat, lower fixed seat, draws the electric unit, cylindrical titanium mesh, tie rod, mandrel; the upper fixing seat comprises an upper base, a bearing I and an inner gear sleeve; the lower fixed seat comprises a lower base, a bearing II and a guide post; the electricity leading unit comprises an electricity leading frame, an electricity leading bearing, an electricity leading rod and an idler wheel; a through hole I is formed in the center of the upper base, and positioning holes are symmetrically formed in the two sides of the upper base; the inner gear sleeve is tubular, and the inner wall of the inner gear sleeve is provided with gear teeth; the lower base is provided with an annular boss; a through hole II is formed in the center of the electricity leading frame, and positioning columns are symmetrically arranged on two sides of the electricity leading frame; the middle part of the electric leading rod is provided with a gear, and the lower part of the electric leading rod is provided with a thread section; the upper section of the core mould is provided with an internal thread hole, and the lower section of the core mould is provided with a guide hole; the upper base and the lower base are fixedly connected together in parallel and oppositely through 4 uniformly distributed connecting rods; the internal gear sleeve is rotatably arranged in the through hole I through a bearing I; the guide post is rotatably arranged at the center of the annular boss; the positioning column is arranged in the positioning hole in a matching way; the lead electric rod is rotatably arranged in the through hole II through a lead electric bearing; the idler wheel is rotatably arranged on the power lead frame and is meshed with the gear and the gear teeth simultaneously; the internal thread hole is matched and connected with the thread section, and the guide hole is matched and connected with the guide post; one end of the cylindrical titanium net is fixedly matched and connected with the inner gear sleeve, and the other end of the cylindrical titanium net is rotatably matched and installed with the outer surface of the annular boss through a bearing II; the cylindrical titanium net is coaxial with the core mold, and the distance between the inner surface of the cylindrical titanium net and the surface of the core mold is 1-5 mm.

And the electricity leading frame is provided with an electricity leading column.

And the bearing I and the bearing II are both made of acid and alkali corrosion resistant nylon.

The material grade of the cylindrical titanium mesh is TA1, and the mesh number is 5-40.

Compared with the prior art, the invention has the beneficial effects that:

1. the thickness distribution uniformity of the electroforming layer is good. The cylindrical titanium net and the core mold are coaxially arranged, and can perform relative reverse rotation movement, so that electrolyte close to the surface of the core mold can be stirred with the same strength, and a uniformly distributed flow field is formed on the surface of the core mold. In addition, the cylindrical titanium mesh with full conductivity can carry out secondary homogenization on the electric field from the anode, so that the electric field distribution on the surface of the mandrel is more uniform. The two components cooperate to make the thickness distribution of the electroformed metal round tube uniform.

2. The electroforming speed is faster. The cylindrical titanium mesh and the core mold can perform relative reverse rotation movement, so that the stirring of electrolyte near the core mold is enhanced, the updating speed of the electrolyte on the surface of the core mold is higher, the thickness of a diffusion layer is thinner, the mass transfer efficiency in the electroforming process is higher, and the electroforming speed is higher.

3. The surface quality of the electroforming metal round pipe is good, and the yield is high. The strong stirring caused by the relative reverse rotation motion of the cylindrical titanium mesh and the core mold can effectively drive off air bubbles possibly generated on the surface of the core mold, so that the air bubbles are prevented from being attached to the surface of the core mold, the number of pinholes in a certain area of an electroformed layer is greatly reduced, and favorable conditions are created for preparing a metal round pipe by electroforming.

Drawings

FIG. 1 is a three-dimensional schematic of the present invention.

Fig. 2 is a partial cross-sectional schematic view of the present invention.

Fig. 3 is a schematic sectional view of the upper fixing base of the present invention.

Fig. 4 is a schematic cross-sectional view of the lower fixing base of the present invention.

Fig. 5 is a three-dimensional schematic diagram of the electricity-drawing unit in the present invention.

Fig. 6 is a front view of the electrifying unit in the present invention.

Figure 7 is a schematic view of the assembly of the present invention in use.

Fig. 8 is a schematic view of the gear mesh of the present invention.

Reference numbers and designations in the drawings: 1. an upper fixed seat; 1-1, mounting a base; 1-1-1, a through hole I; 1-1-2, positioning holes; 1-2, bearing I; 1-3, an internal gear sleeve; 1-3-1, gear teeth; 2. a lower fixed seat; 2-1, a lower base; 2-1-1, annular boss; 2-2, bearing II; 2-3, a guide post; 3. a power-on unit; 3-1, a power lead frame; 3-1-1, a through hole II; 3-1-2, and an electricity leading column; 3-1-3, a positioning column; 3-2, leading an electric bearing; 3-3, leading the pole; 3-3-1, gear; 3-3-2 of thread segments; 3-4, an idler wheel; 4. a cylindrical titanium mesh; 5. a coupling rod; 6. a core mold; 6-1, an internal threaded hole; 6-2 and a guide hole.

Detailed Description

The following further describes the implementation of the present invention with reference to the drawings, which shows a detailed embodiment and the operation steps of electroforming a metal round pipe, but the scope of the present invention is not limited to the following examples.

As shown in fig. 1 to 8, a hanger for electroforming a metal round tube comprises an upper fixed seat 1, a lower fixed seat 2, an electricity leading unit 3, a cylindrical titanium mesh 4, a connecting rod 5 and a core mold 6; the upper fixing seat 1 comprises an upper base 1-1, a bearing I1-2 and an internal gear sleeve 1-3; the lower fixing seat 2 comprises a lower base 2-1, a bearing II 2-2 and a guide post 2-3; the electricity leading unit 3 comprises an electricity leading frame 3-1, an electricity leading bearing 3-2, an electricity leading rod 3-3 and an idler wheel 3-4; the center of the upper base 1-1 is provided with a through hole I1-1-1, and the two sides are symmetrically provided with positioning holes 1-1-2; the inner gear sleeve 1-3 is tubular, and the inner wall of the inner gear sleeve is provided with gear teeth 1-3-1; the lower base 2-1 is provided with an annular boss 2-1-1; the center of the electricity leading frame 3-1 is provided with a through hole II 3-1-1, and the two sides are symmetrically provided with positioning columns 3-1-3; the lead pole 3-3 is made of red copper with good conductivity, a gear 3-3-1 is arranged in the middle of the lead pole, and a thread section 3-3-2 is arranged at the lower part of the lead pole; the core mold 6 is an SUS304 stainless steel bar with the length of 400mm and the diameter of 30mm, an internal thread hole 6-1 is arranged at the upper section of the core mold, and a guide hole 6-2 is arranged at the lower section of the core mold; the upper base 1-1 and the lower base 2-1 are fixedly connected together in parallel and opposite to each other through 4 uniformly distributed connecting rods 5; the internal gear sleeve 1-3 is rotatably arranged in the through hole I1-1-1 through a bearing I1-2; the guide post 2-3 is rotatably arranged at the center of the annular boss 2-1-1; the positioning column 3-1-3 is arranged in the positioning hole 1-1-2 in a matching way; the lead pole 3-3 is rotatably arranged in the through hole II 3-1-1 through a lead bearing 3-2; the idle wheel 3-4 is rotatably arranged on the lead frame 3-1 and is simultaneously meshed with the gear 3-3-1 and the gear teeth 1-3-1; the internal thread hole 6-1 is connected with the thread section 3-3-2 in a matching way, and the guide hole 6-2 is connected with the guide post 2-3 in a matching way; the cylindrical titanium net 4 is 420mm in length, 35mm in inner diameter and 0.2mm in thickness, one end of the cylindrical titanium net is fixedly matched and connected with the inner gear sleeve 1-3, and the other end of the cylindrical titanium net is rotatably matched and installed with the outer surface of the annular boss 2-1-1 through a bearing II 2-2; the cylindrical titanium mesh 4 is coaxial with the core mold 6, and the distance between the inner surface thereof and the surface of the core mold 6 is 2.5 mm.

The upper base 1-1, the lower base 2-1, the internal gear sleeve 1-3 and the connecting rod 5 are all made of polypropylene.

The lead frame 3-1 is made of red copper with good conductivity, and the side surface of the lead frame is provided with a lead column 3-1-2.

The bearings I1-2 and the bearings II 2-2 are made of acid and alkali corrosion resistant nylon.

The material grade of the cylindrical titanium net 4 is TA1, and the mesh number is 20.

Based on the hanger, the specific operation steps for preparing the metal round pipe by electroforming are as follows:

(a) the assembled hanger and electroforming anode (strip nickel plate with purity of 99.99%, not shown in the figure) are parallelly and fixedly placed in watt type electrolyte with temperature of 55 ℃ and PH of 4.5;

(b) connecting the electroforming anode with the positive electrode of an electroplating power supply (not shown), connecting the electric lead column 3-1-2 with the negative electrode of the electroplating power supply, and connecting the upper end part of the electric lead rod 3-3 with a rotating motor (not shown);

(c) starting a rotating motor, and under the driving action of the rotating motor and the transmission action of a gear mechanism, the cylindrical titanium mesh 4 and the core mold 6 perform relative reverse rotation movement;

(d) the electroplating power supply was turned on, and electroforming was carried out for 2h at a current density of 2A/dm (the thickness of the electroformed layer grown under this condition was 50 μm);

(e) after the electroforming is finished, the electroplating power supply and the rotating motor are sequentially closed, the core mould 6 after electroforming is taken out from the hanger, the surface of the electroforming layer is washed by a large amount of distilled water, and the electroforming layer is taken down from the core mould 6 after the electroforming layer is washed cleanly, so that the metal round pipe with the length of 400mm, the inner diameter of 30mm and the thickness of 50 mu m is manufactured.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. Any person skilled in the art should be able to cover the technical scope of the present invention by equivalent or modified solutions and modifications within the technical scope of the present invention.