CN111218713A - Machining equipment and method for controlling size of tungsten-molybdenum wire - Google Patents
Machining equipment and method for controlling size of tungsten-molybdenum wire Download PDFInfo
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- CN111218713A CN111218713A CN202010116838.2A CN202010116838A CN111218713A CN 111218713 A CN111218713 A CN 111218713A CN 202010116838 A CN202010116838 A CN 202010116838A CN 111218713 A CN111218713 A CN 111218713A
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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
- C25F7/00—Constructional parts, or assemblies thereof, of cells for electrolytic removal of material from objects; Servicing or operating
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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
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/08—Refractory metals
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Abstract
A processing device for controlling the size of a tungsten-molybdenum wire sequentially comprises a paying-off wheel, a tension adjusting component, an electrolytic tank, a cleaning tank, a drying component, a wire guide wheel, a size measuring instrument and a wire winding wheel; the electrolytic cell also comprises an electrolytic power supply, a controller and a current tester, wherein the input end of the current tester is connected between the cathode of the electrode of the electrolytic cell and the electrolytic power supply, and the output end of the current tester is electrically connected with the input end of the controller; the output end of the size measuring instrument is electrically connected with the input end of the controller; the output end of the controller is connected with the current adjusting part of the electrolytic cell. By adopting the device, the measuring instrument sends the measured size to the controller, when the size fluctuates, the controller outputs a control signal to regulate the electrolytic current, and the size tolerance range of the wire material is extremely small (less than 0.1mm) through the accurate control of the electrolytic current, so that the requirement of a customer is met, the one-time rejection rate of the wire material is greatly reduced, the production efficiency and the input and output of the wire material are improved, and the production cost is reduced.
Description
Technical Field
The invention belongs to the field of tungsten-molybdenum wire preparation, and particularly relates to tungsten-molybdenum wire processing equipment and a method for controlling the size of a tungsten-molybdenum wire.
Background
The white tungsten (molybdenum) wire is a tungsten wire obtained by alkali washing, hydrogen sintering or electrolysis of the black tungsten (molybdenum) wire, and compared with the black tungsten (molybdenum) wire, the white tungsten (molybdenum) wire has the advantages of smooth, bright and clean surface, silver gray metallic luster, uniform wire diameter, good processing and forming performance, long service life of the filament and high luminous efficiency. The method is widely applied to the electronic vacuum industry for producing electronic tubes of various types. The filament is used for H series automobile lamps, halogen lamps and other special bulbs produced in the electric light source industry.
Patent CN201010258482.2 discloses a device for continuously cleaning the surface of a molybdenum wire at high temperature, which comprises a paying-off mechanism, a first wire guide wheel, a cleaning mechanism, a second wire guide wheel and a wire take-up mechanism in sequence; the two ends of the furnace body of the cleaning mechanism are provided with a molybdenum wire inlet hole and a molybdenum wire outlet hole, the molybdenum wire inlet hole and the middle part in the furnace body are provided with electrodes connected with a power supply, the upper part of the furnace body is provided with a gas outlet, and the lower part of the furnace body is provided with a wet hydrogen inlet; a heating section in the furnace body is formed between the electrode at the molybdenum wire inlet and the electrode at the middle part of the furnace body, and a cooling section in the furnace body is formed between the electrode at the middle part of the furnace body and the molybdenum wire outlet. The invention also discloses a process for continuously cleaning the surface of the molybdenum wire at high temperature, which comprises the steps of heating the molybdenum wire between two electrodes to 750-1200 ℃, carrying out thermochemical reaction with wet hydrogen in a furnace body, removing impurities on the surface of the molybdenum wire, and eliminating the stress of the molybdenum wire in the wire drawing process.
However, the quality of the wire diameter consistency and the coaxiality of the white tungsten (molybdenum) wire product obtained by the method is not high in electrolytic quality, and an electrolytic cleaning process flow chart is shown in figure 1, (1) a paying-off wheel, (2) a tension regulator, (3) an electrolytic bath, (4) a cleaning groove, (5) a drying box, (6) a wire guide wheel, (7) a wire take-up wheel. The cleaning method comprises the following steps: under the drive of a wire winding wheel 7, a tungsten wire arranged on a wire unwinding wheel 1 enters an electrolytic tank 3 filled with strong alkaline solution through a tension regulator 2 to be subjected to electrolytic corrosion, then excessive alkali liquor adsorbed on the surface of the tungsten wire is cleaned through a cleaning tank 4, and finally the tungsten wire is dried through a drying box 5 and wound on a wire winding wheel 7 through a wire guide wheel 6 to obtain the required white wire.
Although the quality of the white wire obtained by the electrolysis method is improved and the surface quality is good, the size fluctuation of the wire is usually more than 0.1mm, and the requirement of a customer with the size tolerance range of less than 0.1mm cannot be met.
In addition, the size of the conventional wire is checked after the cleaning process is finished, and the size of the wire is controlled by adjusting the wire drawing rate during cleaning after the size is found to be out of tolerance.
Disclosure of Invention
The invention aims to provide a device and a method for controlling the size of a tungsten wire or a molybdenum wire, wherein the device comprises a pay-off wheel, a tension adjusting part, an electrolytic bath, a cleaning tank, a drying part, a wire guide wheel, a size measuring instrument and a wire collecting wheel; the device also comprises an electrolytic power supply, a controller, a current tester and a size measuring instrument; the input end of the current tester is connected between the cathode of the electrolysis electrode and the electrolysis power supply, and the output end of the current tester is electrically connected with the input end of the controller; the output end of the size measuring instrument is electrically connected with the input end of the controller; the output end of the controller is connected with the current adjusting part of the electrolytic cell.
The dimension measuring instrument is a laser diameter measuring instrument.
By adopting the device, the wire on the pay-off wheel sequentially passes through the tension adjusting part, the electrolytic bath, the cleaning tank, the drying part, the wire guide wheel and the measuring area of the laser diameter gauge and is tightened on the wire take-up wheel, so that the on-line detection of the cleaned wire can be realized. The size measuring instrument feeds back the size on-line detection data electric signal to the controller, the controller compares the obtained size data with a set value, if the size data exceeds the set value, the controller starts the current adjusting part, if the size is larger, the electrolytic current is increased, and if the size is smaller, the electrolytic current is reduced.
According to the device and the method, when the size fluctuates, the size of the wire material is always fluctuated within a set value range through the accurate control of the electrolytic current, the tolerance range is extremely small (<0.1mm), the requirements of customers are met, the one-time rejection rate of the wire material is greatly reduced, the production efficiency and the input and output of the wire material are improved, and the production cost is reduced.
Drawings
Fig. 1 shows a tungsten wire cleaning apparatus of the prior art 1.
FIG. 2 shows a tungsten wire cleaning apparatus according to an embodiment of the present invention.
FIG. 3 is a control schematic of an embodiment of the present invention.
Fig. 4 is a PID control flowchart.
Fig. 5 is a comparison graph of the wire diameter CPK of the prior art constant current control system and the current feedback control system of the present invention.
FIG. 6 is a comparison of the white filament sizes produced by the tungsten filament No. 1 in the example with the constant current control system and the control system of the present invention.
FIG. 7 is a graph comparing the sizes of white filaments produced by the tungsten wire No. 2 in the constant current control system and the control system of the present invention in the example.
FIG. 8 is a comparison of the white filament sizes produced by the constant current control system and the control system of the present invention for tungsten filament number 3 in example 3.
FIG. 9 is a graph comparing the sizes of white filaments produced by the constant current control system and the control system of the present invention for tungsten filament No. 4 in example 4.
FIG. 10 is a graph comparing the dimensions of white filaments produced by tungsten wire number 5 in the example with the constant current control system and the control system of the present invention.
FIG. 11 is a comparison of the white filament sizes produced by the constant current control system and the control system of the present invention for tungsten wire number 6 in example 6.
FIG. 12 is a comparison of the white filament sizes produced in the constant current control system and the control system of the present invention for tungsten wire number 7 in example 7.
FIG. 13 is a graph comparing the dimensions of white filaments produced by tungsten wire No. 8 in the example with the constant current control system and the control system of the present invention.
FIG. 14 is a graph comparing the size of white filaments produced by tungsten wire number 9 in the example with the constant current control system and the control system of the present invention.
FIG. 15 is a graph comparing the dimensions of white filaments produced in the constant current control system and the control system of the present invention from tungsten wire number 10 in example 10.
Description of the figures of the drawings:
1. a paying-off wheel; 2. a tension adjuster; 3. an electrolytic cell; 4. a cleaning tank; 5. a drying oven; 6. a wire guide wheel; 7. a take-up pulley; 8. laser diameter measuring instrument.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 2, the tungsten filament cleaning device (control component not shown) of the present invention comprises a paying-off wheel 1, a tension regulator 2, an electrolytic bath 3, a cleaning tank 4, a drying box 5, a wire guide wheel 6, a laser diameter measuring instrument, and a take-up wheel 7 in sequence; the device also comprises a PID controller and a current tester; the input end of the current tester is connected between the cathode of the electrolysis electrode and the electrolysis power supply, and the output end of the current tester is electrically connected with the input end of the controller; the output end of the laser diameter measuring instrument is electrically connected with the input end of the controller; the output end of the PID controller is connected with the current regulating part of the electrolytic cell. The controller, the current tester and the current adjusting part form a current feedback control system.
The wire wound on the pay-off wheel 1 sequentially passes through a tension regulator 2, an electrolytic bath 3, a cleaning tank 4, a drying box 5, a wire guide wheel 7 and a measuring area of a laser diameter measuring instrument 8 and is tightened on a wire take-up wheel 7. The wire winding wheel is driven, electrolysis starts, and the on-line detection and size control of the wire can be realized while the wire is cleaned.
The working principle and the control flow of the embodiment of the invention are shown in fig. 3 and 4, and according to the formula of delta mg/3.6V (speed) ═ I0Calculating an initial current and manually setting I0(ii) a And setting a central value and upper and lower size control limits in the PID, wherein the upper and lower size control limits are between the upper and lower limits of the actual product size specification. The wire moves in the measuring area, the laser diameter measuring instrument starts measuring, data signals are transmitted to the PID controller, measured values are read, the deviation between the measured values and the central value is calculated, whether the deviation is out of tolerance or not is judged, if the deviation is not out of tolerance, the measured values are continuously read, and if the deviation is out of tolerance, UP, UI, Ud and UK are calculated, and the PID controller outputs control signals to a current adjusting part of the electrolytic cell according to the calculation result. Namely, when the on-line measurement value is larger than the set upper limit or smaller than the set lower limit, the current feedback control system increases or decreases the current to enable the on-line measurement value to fluctuate within the range of the set upper limit and the set lower limit, so that the uniformity of the size of the white filament is improved. And after the control signal is output, returning to the measurement, and circularly repeating the steps. The measurement adjustment process being carried out throughout the production processAlways.
Ten tungsten wires with specification sizes (number 1-10) are selected and respectively used for carrying out comparison experiments with the conventional constant current electrolysis control system in the prior art by using the device with the current feedback control system, the measurement and detection comparison results are shown in a table 1, a wire diameter CPK comparison graph is shown in a figure 5, and size comparison graphs are shown in figures 6-15, wherein the front half part of a red line is the product size cleaned by the constant current system, and the rear half part of the red line is the size cleaned by the control system.
From the comparative data of table 1 and fig. 5 and fig. 6-15, it is proved that the white filament size Capability (CPK) cleaned by current feedback is higher than that of the current constant current system, the size tolerance fluctuation range is smaller, and the white filament size yield reaches 100% due to the realization of on-line detection and real-time current adjustment control.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Such as molybdenum wire size control.
Claims (4)
1. The processing equipment for controlling the size of the tungsten-molybdenum wire is characterized by sequentially comprising the following components: the device comprises a paying-off wheel, a tension adjusting component, an electrolytic bath, a cleaning tank, a drying component, a wire guide wheel, a dimension measuring instrument and a wire winding wheel; the electrolytic cell also comprises an electrolytic power supply, a controller and a current tester, wherein the input end of the current tester is connected between the cathode of the electrode of the electrolytic cell and the electrolytic power supply, and the output end of the current tester is electrically connected with the input end of the controller; the output end of the size measuring instrument is electrically connected with the input end of the controller; the output end of the controller is connected with the current adjusting part of the electrolytic cell.
2. The machining apparatus for controlling the size of a tungsten-molybdenum wire according to claim 1, wherein the size measuring instrument is a laser caliper.
3. The apparatus of claim 1, wherein the controller is a PID.
4. A method for controlling the size of a tungsten-molybdenum wire is characterized by comprising the following steps:
s1, the tungsten-molybdenum wire on the pay-off wheel sequentially passes through the tension adjusting component, the electrolytic bath, the cleaning tank, the drying component, the wire guide wheel and the measuring area of the dimension measuring instrument and is tightened on the wire take-up wheel;
s2, setting the initial current of the electrolysis of the electrolytic cell, and setting a size control center value and size control upper and lower limits in the controller;
s3 when the electrolysis starts, when the tungsten molybdenum wire passes through the measuring area of the measuring instrument, the measuring instrument immediately feeds back the detected size data to the controller, the controller compares the obtained size data with the set value, if the size data exceeds the set value, the controller starts the current adjusting part, if the size data is larger, the electrolysis current is increased, and if the size data is smaller, the electrolysis current is reduced.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010116838.2A CN111218713A (en) | 2020-02-25 | 2020-02-25 | Machining equipment and method for controlling size of tungsten-molybdenum wire |
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| CN202010116838.2A CN111218713A (en) | 2020-02-25 | 2020-02-25 | Machining equipment and method for controlling size of tungsten-molybdenum wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916636A (en) * | 2021-02-08 | 2021-06-08 | 宜昌给立金刚石工业有限公司 | Rapid electrolytic reducing device and method for metal wire |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1796236A1 (en) * | 1968-09-26 | 1972-03-09 | Patra Patent Treuhand | Method and device for electrolytic etching, in particular for leveling wires made of refractory metals such as tungsten or molybdenum |
| KR20050024829A (en) * | 2003-09-04 | 2005-03-11 | 진찬우 | Washing Method and Device of Tungsten Wire |
| CN101368287A (en) * | 2008-09-12 | 2009-02-18 | 西北有色金属研究院 | Multi-working procedure combined ultra-fine molybdenum filament continuous processing method and equipment |
| CN203602748U (en) * | 2013-10-27 | 2014-05-21 | 西北机器有限公司 | Tungsten molybdenum wire cleaning machine |
| CN104562170A (en) * | 2013-10-27 | 2015-04-29 | 西北机器有限公司 | Tungsten-molybdenum wire cleaning machine |
| CN106191822A (en) * | 2016-07-03 | 2016-12-07 | 昆山中冶宝钢焊接材料有限公司 | A kind of on-line monitoring for preparation technology of welding wire and Real-time Feedback and self compensating system |
| CN107059032A (en) * | 2017-04-01 | 2017-08-18 | 内蒙古工业大学 | Wire automatic processing device |
| CN107904653A (en) * | 2017-10-30 | 2018-04-13 | 中国科学院电工研究所 | A kind of fine preparation method of wolfram filament for X-ray zone plate |
-
2020
- 2020-02-25 CN CN202010116838.2A patent/CN111218713A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1796236A1 (en) * | 1968-09-26 | 1972-03-09 | Patra Patent Treuhand | Method and device for electrolytic etching, in particular for leveling wires made of refractory metals such as tungsten or molybdenum |
| KR20050024829A (en) * | 2003-09-04 | 2005-03-11 | 진찬우 | Washing Method and Device of Tungsten Wire |
| CN101368287A (en) * | 2008-09-12 | 2009-02-18 | 西北有色金属研究院 | Multi-working procedure combined ultra-fine molybdenum filament continuous processing method and equipment |
| CN203602748U (en) * | 2013-10-27 | 2014-05-21 | 西北机器有限公司 | Tungsten molybdenum wire cleaning machine |
| CN104562170A (en) * | 2013-10-27 | 2015-04-29 | 西北机器有限公司 | Tungsten-molybdenum wire cleaning machine |
| CN106191822A (en) * | 2016-07-03 | 2016-12-07 | 昆山中冶宝钢焊接材料有限公司 | A kind of on-line monitoring for preparation technology of welding wire and Real-time Feedback and self compensating system |
| CN107059032A (en) * | 2017-04-01 | 2017-08-18 | 内蒙古工业大学 | Wire automatic processing device |
| CN107904653A (en) * | 2017-10-30 | 2018-04-13 | 中国科学院电工研究所 | A kind of fine preparation method of wolfram filament for X-ray zone plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916636A (en) * | 2021-02-08 | 2021-06-08 | 宜昌给立金刚石工业有限公司 | Rapid electrolytic reducing device and method for metal wire |
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