CN110886011A - Titanium tube electrolytic polishing method - Google Patents
Titanium tube electrolytic polishing method Download PDFInfo
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- CN110886011A CN110886011A CN201911154585.1A CN201911154585A CN110886011A CN 110886011 A CN110886011 A CN 110886011A CN 201911154585 A CN201911154585 A CN 201911154585A CN 110886011 A CN110886011 A CN 110886011A
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- Prior art keywords
- titanium tube
- lower layer
- electrolyte
- titanium
- upper layer
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/22—Polishing of heavy metals
- C25F3/26—Polishing of heavy metals of refractory metals
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
Abstract
The invention provides a titanium tube electrolytic polishing method, which comprises the following steps: dividing the electrolytic cell into an upper layer and a lower layer, wherein the upper layer and the lower layer are communicated and are filled with electrolyte simultaneously; placing a titanium tube on the lower layer of the electrolytic cell, and placing a cathode bar on the upper layer of the electrolytic cell; and switching on a power supply, and performing electrolytic polishing on the titanium tube by adopting the electrolyte. In the invention, the electrolytic cell is divided into an upper layer and a lower layer, the upper layer is provided with a liquid injection port, the lower layer is provided with a liquid discharge port, electrolyte is injected from the upper layer of the electrolytic cell, the electrolyte flows into the lower layer from the mutually communicated parts of the upper layer and the lower layer, and is finally discharged from the lower layer, so that the electrolyte forms a flowing solution, and the titanium tube is positioned at the lower layer of the electrolytic cell, therefore, the flowing solution can break bubbles generated on the surface of the titanium tube during electrolytic polishing, and the smooth finish of the surface of the titanium tube.
Description
Technical Field
The invention relates to the field of titanium materials, in particular to an electrolytic polishing method for a titanium tube.
Background
The titanium tube has light weight, high strength and excellent mechanical performance, and is widely applied to various fields of aviation, aerospace, medical treatment and the like. At present, there are many methods for leveling the surface of a titanium tube, which are mainly divided into three methods, i.e., mechanical polishing, chemical polishing and electrochemical polishing.
In order to improve the brightness of the titanium tube, electrochemical polishing is generally used. The electrochemical polishing is a processing method for gradually making the metal surface micro-smooth based on the principle of metal anode electrochemical dissolution, can greatly reduce the residual stress inside and on the surface of a polished part, is not limited by the shapes of titanium and titanium alloy devices, and has the advantages of high processing efficiency, corrosion resistance and the like.
Most of the surface of the titanium tube after polishing is flat and smooth in the existing electrochemical polishing process, but some points or blocks on the surface of the titanium tube are still not bright enough. Based on this, there is a need to provide a titanium tube electropolishing method to solve the above problems.
Disclosure of Invention
The invention provides a titanium tube electrolytic polishing method, which utilizes flowing electrolyte to carry out electrolytic polishing on a titanium tube so as to improve the surface smoothness of the titanium tube.
The technical scheme for realizing the purpose of the invention is as follows:
an electrolytic polishing method for a titanium tube comprises the following steps:
dividing the electrolytic cell into an upper layer and a lower layer, wherein the upper layer and the lower layer are communicated and are filled with electrolyte simultaneously;
placing a titanium tube on the lower layer of the electrolytic cell, and placing a cathode bar on the upper layer of the electrolytic cell;
and switching on a power supply, and performing electrolytic polishing on the titanium tube by adopting the electrolyte.
In the invention, the electrolytic cell is divided into an upper layer and a lower layer, the upper layer is provided with a liquid injection port, the lower layer is provided with a liquid discharge port, electrolyte is injected from the upper layer of the electrolytic cell, the electrolyte flows into the lower layer from the mutually communicated parts of the upper layer and the lower layer, and is finally discharged from the lower layer, so that the electrolyte forms a flowing solution, and the titanium tube is positioned at the lower layer of the electrolytic cell, therefore, the flowing solution can break bubbles generated on the surface of the titanium tube during electrolytic polishing, and the smooth finish of the surface of the titanium tube.
As a further improvement of the invention, after the power supply is switched on, the polishing is carried out for 8-15 min at 30-40 ℃ and under the voltage of 35-45V.
As a further improvement of the invention, the titanium tube is washed with water after the electrolytic polishing.
As a further improvement of the invention, a plurality of titanium tubes are simultaneously electropolished.
The invention can simultaneously carry out electrolytic polishing on a plurality of titanium tubes, thereby improving the efficiency of electrolytic polishing.
As a further development of the invention, the electrolyte comprises 15% by weight of sodium chloride and 3% by weight of sodium bromide.
As a further improvement of the invention, after the electrolytic polishing is finished, the voltage is directly reduced to 1/3-1/2 of the electrolytic polishing, and the titanium tube is subjected to electroetching, wherein the electroetching time is less than 1/2 of the polishing time.
As a further improvement of the invention, the electropolishing current density is greater than conventional electropolishing current densities. The current density of the electrolytic polishing is 0.7-0.12A/cm2。
In order to avoid the bubbles on the surface of the titanium pipe to the maximum extent, the bubbles generated on the surface of the titanium pipe cannot be separated in time during polishing, and are attached to the surface of the titanium pipe to cause that some points or blocks on the surface of the titanium pipe are still not bright enough. According to the invention, the brightness of the surface of the titanium tube is improved through the scheme, and the current density is also improved, so that the bubbles can be conveniently desorbed.
Compared with the prior art, the invention has the beneficial effects that:
1. the electrolytic cell is divided into an upper layer and a lower layer, the upper layer is provided with a liquid injection port, the lower layer is provided with a liquid discharge port, electrolyte is injected from the upper layer of the electrolytic cell, the electrolyte flows into the lower layer from the mutually communicated parts of the upper layer and the lower layer, and is finally discharged from the lower layer, so that the electrolyte forms a flowing solution, and the titanium tube is positioned at the lower layer of the electrolytic cell, therefore, the flowing solution can break bubbles generated on the surface of the titanium tube during electrolytic polishing, and the smooth finish of the surface of the titanium tube is improved.
2. The invention can simultaneously carry out electrolytic polishing on a plurality of titanium tubes, thereby improving the efficiency of electrolytic polishing.
3. In order to avoid the bubbles on the surface of the titanium pipe to the maximum extent, the bubbles generated on the surface of the titanium pipe cannot be separated in time during polishing, and are attached to the surface of the titanium pipe to cause that some points or blocks on the surface of the titanium pipe are still not bright enough. According to the invention, the brightness of the surface of the titanium tube is improved through the scheme, and the current density is also improved, so that the bubbles can be conveniently desorbed.
Detailed Description
The present invention is described in detail with reference to the embodiments shown below, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should be able to make modifications and substitutions on the functions, methods, or structural equivalents of these embodiments without departing from the scope of the present invention.
The invention provides a titanium tube electrolytic polishing method, which comprises the following steps: dividing the electrolytic cell into an upper layer and a lower layer, wherein the upper layer and the lower layer are communicated and are filled with electrolyte simultaneously; placing a titanium tube on the lower layer of the electrolytic cell, and placing a cathode bar on the upper layer of the electrolytic cell; and switching on a power supply, and performing electrolytic polishing on the titanium tube by adopting the electrolyte.
In the invention, the electrolytic cell is divided into an upper layer and a lower layer, the upper layer is provided with a liquid injection port, the lower layer is provided with a liquid discharge port, electrolyte is injected from the upper layer of the electrolytic cell, the electrolyte flows into the lower layer from the mutually communicated parts of the upper layer and the lower layer, and is finally discharged from the lower layer, so that the electrolyte forms a flowing solution, and the titanium tube is positioned at the lower layer of the electrolytic cell, therefore, the flowing solution can break bubbles generated on the surface of the titanium tube during electrolytic polishing, and the smooth finish of the surface of the titanium tube.
Specifically, after the power is switched on, polishing is carried out for 8-15 min at 30-40 ℃ and under the voltage of 35-45V. The titanium tube was water washed after the electropolishing. In order to improve the electrolytic polishing efficiency of the titanium tube, the multiple titanium tubes are simultaneously subjected to electrolytic polishing. Preferably, the electrolyte comprises 15% by weight of sodium chloride and 3% by weight of sodium bromide. After the electrolytic polishing is finished, the voltage is directly reduced to 1/3-1/2 of the electrolytic polishing, and the titanium tube is subjected to electroetching, wherein the electroetching time is less than 1/2 of the polishing time. The current density of electropolishing is greater than that of conventional electropolishing. The current density of the electrolytic polishing is 0.7-0.12A/cm2。
The first implementation mode comprises the following steps:
the embodiment provides a titanium tube electrolytic polishing method, which comprises the steps of grinding and polishing a titanium tube, and then putting the titanium tube into an electrolytic cell for electrolytic polishing; and in the electrolytic polishing, the polished titanium tube is used as an anode, and the cathode bar is used as a cathode. And cleaning the titanium tube subjected to the electrolytic polishing treatment by using water and ethanol in sequence, and drying.
Before electrolytic polishing, the voltage of a constant-current stabilized-voltage power supply beside an electrolytic cell is adjusted to 40V, then electrolytic polishing is started, a titanium tube is immersed into electrolyte in parallel with a cathode bar, mechanical stirring is carried out, and the electrolytic polishing time is 15 min.
In the electrolytic polishing method of a titanium tube of the present embodiment, the electrolytic solution includes a first electrolytic solution region where the titanium tube is located and a second electrolytic solution region where the cathode bar is located; the second electrolyte area where the cathode bar is located is positioned above the first electrolyte area where the titanium tube is located, and the second electrolyte area where the cathode bar is located is communicated with the first electrolyte area where the titanium tube is located; a plurality of titanium tubes are arranged in the first electrolyte area where the titanium tubes are located and serve as anodes, the plurality of titanium tubes serve as anodes and are composed of a plurality of vertically arranged titanium tubes, and all the titanium tubes are connected through titanium materials; a cathode bar serving as a cathode is arranged in the second electrolyte area where the cathode bar is located, the cathode bar serving as the cathode is composed of a plurality of cathode bars which are vertically arranged, metal wires are wound on the outer walls of all the cathode bars, and all the cathode bars are connected through the metal wires; a bubble removing device is arranged between a first electrolyte area where the titanium tube is located and a second electrolyte area where the cathode bar is located, and the bubble removing device is connected with a vacuum pump through a pipeline so as to pump out air in the electrolyte; the second electrolyte area where the cathode bar is located has a taper with a small upper part and a big lower part, the top end of the second electrolyte area where the cathode bar is located is provided with an opening, and a power line of the constant-current stabilized-voltage power supply passes through the opening.
The second embodiment:
the electrolyte consists of a first electrolyte area where the titanium tube is located and a second electrolyte area where the cathode bar is located; the second electrolyte area where the cathode bar is located is positioned above the first electrolyte area where the titanium tube is located, and the second electrolyte area where the cathode bar is located is communicated with the first electrolyte area where the titanium tube is located; a plurality of titanium tubes are arranged in the first electrolyte area where the titanium tubes are located and serve as anodes, the plurality of titanium tubes serve as anodes and are composed of a plurality of vertically arranged titanium tubes, and all the titanium tubes are connected through titanium materials; a cathode bar serving as a cathode is arranged in a second electrolyte area where the cathode bar is located, the cathode bar serving as the cathode is composed of a plurality of cathode bars which are vertically arranged, fixing ropes are wound on the outer walls of all the cathode bars, and all the cathode bars are connected through the fixing ropes; a bubble removing device is arranged between a first electrolyte area where the titanium tube is located and a second electrolyte area where the cathode bar is located, and the bubble removing device is connected with a vacuum pump through a pipeline so as to pump out air in the electrolyte; the second electrolyte area where the cathode bar is located has a taper with a small upper part and a big lower part, the top end of the second electrolyte area where the cathode bar is located is provided with an opening, and a power line of the constant-current stabilized-voltage power supply passes through the opening. Electrolyte is injected into the first electrolyte area where the titanium tube is located and the second electrolyte area where the cathode bar is located. Air in the bubble removing device is pumped out by a vacuum pump, and bubbles rise to react with the cathode bar.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. An electrolytic polishing method for a titanium tube is characterized by comprising the following steps:
dividing the electrolytic cell into an upper layer and a lower layer, wherein the upper layer and the lower layer are communicated and are filled with electrolyte simultaneously;
placing a titanium tube on the lower layer of the electrolytic cell, and placing a cathode bar on the upper layer of the electrolytic cell;
and switching on a power supply, and performing electrolytic polishing on the titanium tube by adopting the electrolyte.
2. The method for electropolishing a titanium tube according to claim 1, wherein after the power is turned on, the titanium tube is polished at 30 to 40 ℃ and 35 to 45V for 8 to 15 minutes.
3. The electrolytic polishing method for a titanium tube according to claim 1 or 2, characterized in that the titanium tube is washed with water after the electrolytic polishing.
4. The electrolytic polishing method for titanium tubes according to claim 1 or 2, characterized in that a plurality of titanium tubes are simultaneously electropolished.
5. The method of claim 1, wherein the electrolyte comprises but is not limited to 15% by weight of sodium chloride and 3% by weight of sodium bromide.
6. The method for electropolishing a titanium tube as claimed in claim 1 or 5, wherein after electropolishing, the voltage is directly decreased to 1/3-1/2 of electropolishing to electroerode the titanium tube, the electroerosion time being less than 1/2 of the polishing time.
7. The method of claim 1, wherein the electropolishing is performed at a current density greater than that of conventional electropolishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154585.1A CN110886011A (en) | 2019-11-22 | 2019-11-22 | Titanium tube electrolytic polishing method |
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| CN201911154585.1A CN110886011A (en) | 2019-11-22 | 2019-11-22 | Titanium tube electrolytic polishing method |
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| CN110886011A true CN110886011A (en) | 2020-03-17 |
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| CN201911154585.1A Pending CN110886011A (en) | 2019-11-22 | 2019-11-22 | Titanium tube electrolytic polishing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112522774A (en) * | 2020-10-27 | 2021-03-19 | 沈阳富创精密设备股份有限公司 | Titanium tube flowing type electrolytic polishing special method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112522774A (en) * | 2020-10-27 | 2021-03-19 | 沈阳富创精密设备股份有限公司 | Titanium tube flowing type electrolytic polishing special method |
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Application publication date: 20200317 |