Conical superfine tungsten filament manufacturing device
By using high-sensitive current detection and precise stepping control modules during the electrolysis of tungsten wire, the instability problem caused by temperature and concentration changes during the electrolysis of tungsten wire is solved, and the stability and qualification of the cone shape of tungsten wire is significantly improved. Rate.
Patent Information
- Application Number
- CN202420627443.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-03-29
AI Technical Summary
During the electrolysis of existing tungsten wires, changes in temperature, concentration and diameter of tungsten wires lead to changes in current, resulting in unstable morphology and low pass rate.
Design a device including an electrolytic power supply module, a current electrical measurement module, a stepping execution module and a control module. Use a high-sensitive milliamper meter to detect the current value of the tungsten wire to control the electrolytic time, combining a stepping screw slide table and a PLC with high accuracy. Controller, precisely controls the length and electrolysis process of tungsten wire.
By accurately controlling the electrolysis process of tungsten wire, the instability caused by changes in temperature, concentration and diameter are avoided, and the stability and pass rate of the cone shape of tungsten wire is significantly improved.
Smart Images
Figure CN222274777U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ceramic splitting knife processing, in particular to a manufacturing device for an ultra-fine tungsten wire cone shape. Background Art
[0002] In the process of splitting knife production, tungsten wire with a micron diameter (10-50um) is needed for hole expansion. The front end of the tungsten wire needs to be conical, which is convenient for drilling. The existing equipment detects the instantaneous signal of the tungsten wire contacting the NaOH electrolyte as the signal of the tungsten wire entering the electrolyte, and controls the length of the tungsten wire electrolysis by slowly running the stepper motor. The final electrolysis shape is controlled according to the electrolysis time required for different models. However, the tungsten wire electrolysis process is affected by the temperature of the solution, the concentration of the solution, the diameter of the tungsten wire and the length of the tungsten wire in the solution. Therefore, changes in temperature, concentration and tungsten wire model during the production process will affect the current change in the electrolysis process, which will cause the tungsten wire shape to be unstable and the qualified rate to be low. Utility Model Content
[0003] The utility model aims to provide a device for making an ultra-fine tungsten wire cone shape, which uses a high-sensitivity milliammeter to detect the current value of the tungsten wire and the NaOH electrolyte to control the time of electrolytic corrosion, thereby avoiding instability caused by changes in the temperature and concentration of the electrolyte, changes in the diameter of the tungsten wire and the set electrolytic time.
[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is to design a device for making an ultrafine tungsten wire cone shape, including an electrolytic power supply module, a current electrical measurement module, a stepping execution module, a control module and an electrolytic module; the electrolytic module includes a cathode and an anode and an electrolyte, the cathode electrode is placed in the electrolyte, and the anode is fixed on the stepping execution module; the stepping execution module is an actuator for controlling the anode to enter and exit the electrolyte in a vertical direction; the output end of the electrolytic power supply module is respectively connected to the stepping execution module, the control module and the electrolytic module to provide energy for the electrolytic process; the detection end of the current electrical measurement module extends into the electrolyte, and the signal output end is connected to the control module; the signal output end of the control module is connected to the stepping execution module.
[0005] Furthermore, the electrolysis power supply module is a 30V DC voltage power supply responsible for providing energy for electrolysis.
[0006] Furthermore, the current measuring module is an ammeter with an accuracy of 1uA or more (including an accuracy of 1uA), which detects the current value of the tungsten wire in the electrolyte, and calculates the corrosion state of the tungsten wire during electrolysis through the current value.
[0007] Furthermore, the stepping execution module is a stepping screw slide with an accuracy of 1um or more (including an accuracy of 1um). The length of the tungsten wire entering the electrolyte is controlled by stepping. The final tungsten wire taper length is 50-100um. The high-precision execution structure helps to improve the product qualification rate.
[0008] Furthermore, the control module is a PLC controller, which is responsible for processing the selection of tungsten wire models, receiving the current received by the acquisition module, and controlling the movement of the actuator through formula calculation to achieve precise length control of the tungsten wire.
[0009] Electrolytic Principle: Electrolytic corrosion is a method of preparing metals by using the electrochemical corrosion of metals in electrolytes, i.e., electrochemical anodes. Electrolysis generally uses AC or DC power for electrolysis. This device uses a human body safe DC voltage of 30V. The electrolytic principle is the reaction as shown below:
[0010] Reaction 2 NaOH + WO4²⁻ → 2 Na⁺ + WO4²⁻ + H2O
[0011] In this equation, sodium hydroxide (NaOH) neutralizes tungstate ions (WO4²⁻) to produce water (H2O) and the corresponding salt.
[0012] The resistance formula of tungsten wire in electrolyte is: I=(V⋅π⋅(d / 2)^2) / (ρ⋅L);
[0013] V is the electrolysis voltage (unit: volt, V);
[0014] d is the diameter of the conductor (unit: meter, m);
[0015] ρ is the resistivity of the conductor material (unit: Ω·m);
[0016] L is the length of the wire (unit: meter, m).
[0017] The advantages and beneficial effects of the utility model are as follows: the utility model is a device for making an ultra-fine tungsten wire cone shape, which uses a high-sensitivity milliammeter to detect the current value of the tungsten wire and the NaOH electrolyte to control the electrolytic corrosion time, and can avoid the instability caused by the change of the temperature and concentration of the electrolyte, the change of the tungsten wire diameter and the mismatch of the set electrolytic time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the utility model.
[0019] Figure 2 It is a side schematic diagram of the utility model.
[0020] Figure 3 It is a local enlarged schematic diagram.
[0021] Among them, there are a stepper screw slide 1, a T-shaped bracket 2, a chuck bracket 3, a tungsten wire sleeve chuck 4, a copper rod 5, a beaker 6, an ammeter 7, a circuit box 8, a power box 9, a tripod 10, and a beaker cover 11. DETAILED DESCRIPTION
[0022] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention. Example
[0023] The manufacturing device of the ultra-fine tungsten wire cone shape comprises a stepping screw slide 1, a T-shaped bracket 2, a chuck bracket 3, a tungsten wire sleeve chuck 4, a copper rod 5, a beaker 6, an ammeter 7, a circuit box 8, a power box 9, a tripod 10, and a beaker cover 11.
[0024] like Figure 1 , Figure 2 and Figure 3 As shown, the power box 9 is fixed on the circuit box 8, and the power box 9 provides energy for electrolysis. The stepping screw slide 1 is fixed on the circuit box 8 through a tripod 10, and the movement direction of the slider of the stepping screw slide 1 is perpendicular to the circuit box 8.
[0025] The ammeter 7 is embedded in the circuit box 8 .
[0026] The slider of the stepping screw slide 1 is connected to the chuck bracket 3 through the T-shaped bracket 2, the front end of the chuck bracket 3 is connected to the tungsten wire sleeve chuck 4, and the front end of the tungsten wire sleeve chuck 4 clamps the tungsten wire so that the tungsten wire is parallel to the stepping screw slide 1.
[0027] The bottom of the beaker 6 is fixed on the circuit box 8 and is located directly below the tungsten wire sleeve chuck 4 .
[0028] The beaker 6 has a beaker cover 11 on its mouth, and the beaker cover 11 is provided with a through hole for the tungsten wire to vertically enter and exit the beaker 6 .
[0029] The copper rod 5 is arranged on the outer wall of the beaker 6 , and one end of the copper rod 5 extends into the beaker 6 , and the other end of the copper rod 5 is connected to the ammeter 7 .
[0030] A PLC controller is provided in the circuit box 8 , the signal input end of the PLC controller is connected to the ammeter, and the signal output end of the PLC controller is connected to the stepping screw slide 1 to control the movement of the slider of the stepping screw slide 1 , thereby controlling the process of the tungsten wire entering and exiting the electrolyte in the beaker 6 .
[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.
Claims
1. A device for making ultra-fine tungsten wire cone shape, characterized by: It includes an electrolysis power supply module, a current electric measurement module, a stepping execution module, a control module and an electrolysis module; the electrolysis module includes positive and negative electrodes and an electrolyte, the negative electrode is placed in the electrolyte, and the anode is fixed on the stepping execution module; the stepping execution module is an actuator for controlling the anode to enter and exit the electrolyte in a vertical direction; the output end of the electrolysis power supply module is respectively connected to the stepping execution module, the control module and the electrolysis module to provide energy for the electrolysis process; the detection end of the current electric measurement module extends into the electrolyte, and the signal output end is connected to the control module; the signal output end of the control module is connected to the stepping execution module.
2. The device for making an ultra-fine tungsten wire cone according to claim 1, characterized in that: The electrolysis power supply module is a 30V DC voltage power supply.
3. The device for making an ultra-fine tungsten wire cone according to claim 1, characterized in that: The current measuring module uses an ammeter with an accuracy of more than 1uA.
4. The device for manufacturing an ultra-fine tungsten wire cone shape according to claim 1, characterized in that: The stepping execution module uses a stepping screw slide with an accuracy of more than 1um.
5. The device for manufacturing an ultra-fine tungsten wire cone shape according to claim 1, characterized in that: The control module is a PLC controller.